Wu H

References (90)

Title : Neuroprotection of macamide in a mouse model of Alzheimer's disease involves Nrf2 signaling pathway and gut microbiota - Xia_2024_Eur.J.Pharmacol_975_176638
Author(s) : Xia N , Xu L , Huang M , Xu D , Li Y , Wu H , Mei Z , Yu Z
Ref : European Journal of Pharmacology , 975 :176638 , 2024
Abstract : The underlying mechanisms of macamide's neuroprotective effects in Alzheimer's disease (AD) were investigated in the paper. Macamides are considered as unique ingredients in maca. Improvement effects and mechanisms of macamide on cognitive impairment have not been revealed. In this study, Vina 1.1.2 was used for docking to evaluate the binding abilities of 12 main macamides to acetylcholinesterase (AChE). N-benzyl-(9Z,12Z)-octadecadienamide (M 18:2) was selected to study the following experiments because it can stably bind to AChE with a strong binding energy. The animal experiments showed that M 18:2 prevented the scopolamine (SCP)-induced cognitive impairment and neurotransmitter disorders, increased the positive rates of Nrf2 and HO-1 in hippocampal CA1, improved the synaptic plasticity by maintaining synaptic morphology and increasing the synapse density. Moreover, the contents of IL-1beta, IL-6, and TNF-alpha in the hippocampus, serum, and colon were reduced by M 18:2. Furthermore, M 18:2 promoted colonic epithelial integrity and partially restored the composition of the gut microbiota to normal, including decreased genera Clostridiales_unclassified and Lachnospiraceae_unclassified, as well as increased genera Muribaculaceae_unclassified, Muribaculum, Alistipes, and Bacteroides, which may be the possible biomarkers of cognitive aging. In summary, M 18:2 exerted neuroprotective effects on SCP-induced AD mice possibly via activating the Nrf2/HO-1 signaling pathway and modulating the gut microbiota.
ESTHER : Xia_2024_Eur.J.Pharmacol_975_176638
PubMedSearch : Xia_2024_Eur.J.Pharmacol_975_176638
PubMedID: 38734297

Title : LET-767 determines lipid droplet protein targeting and lipid homeostasis - Fu_2024_J.Cell.Biol_223_
Author(s) : Fu L , Zhang J , Wang Y , Wu H , Xu X , Li C , Li J , Liu J , Wang H , Jiang X , Li Z , He Y , Liu P , Wu Y , Zou X , Liang B
Ref : Journal of Cell Biology , 223 : , 2024
Abstract : Lipid droplets (LDs) are composed of a core of neutral lipids wrapped by a phospholipid (PL) monolayer containing several hundred proteins that vary between different cells or organisms. How LD proteins target to LDs is still largely unknown. Here, we show that RNAi knockdown or gene mutation of let-767, encoding a member of hydroxysteroid dehydrogenase (HSD), displaced the LD localization of three well-known LD proteins: DHS-3 (dehydrogenase/reductase), PLIN-1 (perilipin), and DGAT-2 (diacylglycerol O-acyltransferase 2), and also prevented LD growth in Caenorhabditis elegans. LET-767 interacts with ARF-1 (ADP-ribosylation factor 1) to prevent ARF-1 LD translocation for appropriate LD protein targeting and lipid homeostasis. Deficiency of LET-767 leads to the release of ARF-1, which further recruits and promotes translocation of ATGL-1 (adipose triglyceride lipase) to LDs for lipolysis. The displacement of LD proteins caused by LET-767 deficiency could be reversed by inhibition of either ARF-1 or ATGL-1. Our work uncovers a unique LET-767 for determining LD protein targeting and maintaining lipid homeostasis.
ESTHER : Fu_2024_J.Cell.Biol_223_
PubMedSearch : Fu_2024_J.Cell.Biol_223_
PubMedID: 38551495

Title : Extracellular Macrophage Migration Inhibitory Factor (MIF) Downregulates Adipose Hormone-Sensitive Lipase (HSL) and Contributes to Obesity - Chen_2023_Mol.Metab__101834
Author(s) : Chen L , Li L , Cui D , Huang Y , Tong H , Zabihi H , Wang S , Qi Y , Lakowski T , Leng L , Liu S , Wu H , Young LH , Bucala R , Qi D
Ref : Mol Metab , :101834 , 2023
Abstract : Attenuation of adipose hormone sensitive lipase (HSL) may impair lipolysis and exacerbate obesity. We investigate the role of cytokine, macrophage migration inhibitory factor (MIF) in regulating adipose HSL and adipocyte hypertrophy. Extracellular MIF released from adipocytes downregulates HSL in an autocrine fashion, by activating the AMPK/JNK signaling pathway upon binding to its membrane receptor, CD74. WT mice fed high fat diet (HFD), as well as mice overexpressing MIF, both had high circulating MIF levels and showed suppression of HSL during the development of obesity. Blocking the extracellular action of MIF by a neutralizing MIF antibody significantly reduced obesity in HFD mice. Interestingly, intracellular MIF binds with Csn5 and JNK, which leads to an opposing effect to inhibit JNK phosphorylation. With global MIF deletion, adipocyte JNK phosphorylation increased, resulting in decreased HSL expression, suggesting that the loss of MIF's intracellular inhibitory action on JNK was dominant in Mif(-/-) mice. Adipose tissue from Mif(-/-) mice also exhibited higher Akt and lower PKA phosphorylation following HFD feeding compared with WT, which may contribute to the downregulation of HSL activation during more severe obesity. Both intracellular and extracellular MIF have opposing effects to regulate HSL, but extracellular actions predominate to downregulate HSL and exacerbate the development of obesity during HFD.
ESTHER : Chen_2023_Mol.Metab__101834
PubMedSearch : Chen_2023_Mol.Metab__101834
PubMedID: 37935315

Title : Identification and characterization of novel carboxyl ester lipase gene variants in patients with different subtypes of diabetes - Wu_2023_BMJ.Open.Diabetes.Res.Care_11_e003127
Author(s) : Wu H , Shu M , Liu C , Zhao W , Li Q , Song Y , Zhang T , Chen X , Shi Y , Shi P , Fang L , Wang R , Xu C
Ref : BMJ Open Diabetes Res Care , 11 : , 2023
Abstract : INTRODUCTION: Mutations of CEL gene were first reported to cause a new type of maturity-onset diabetes of the young (MODY) denoted as MODY8 and then were also found in patients with type 1 (T1D) and type 2 diabetes (T2D). However, its genotype-phenotype relationship has not been fully determined and how carboxyl ester lipase (CEL) variants result in diabetes remains unclear. The aim of our study was to identify pathogenic variants of CEL in patients with diabetes and confirm their pathogenicity. RESEARCH DESIGN AND METHODS: All five patients enrolled in our study were admitted to Shandong Provincial Hospital and diagnosed with diabetes in the past year. Whole-exome sequencing was performed to identify pathogenic variants in three patients with MODY-like diabetes, one newborn baby with T1D and one patient with atypical T2D, as well as their immediate family members. Then the consequences of the identified variants were predicted by bioinformatic analysis. Furthermore, pathogenic effects of two novel CEL variants were evaluated in HEK293 cells transfected with wild-type and mutant plasmids. Finally, we summarized all CEL gene variants recorded in Human Gene Mutation Database and analyzed the mutation distribution of CEL. RESULTS: Five novel heterozygous variants were identified in CEL gene and they were predicted to be pathogenic by bioinformatic analysis. Moreover, in vitro studies indicated that the expression of CEL(R540C) was remarkably increased, while p.G729_T739del variant did not significantly affect the expression of CEL. Both novel variants obviously abrogated the secretion of CEL. Furthermore, we summarized all reported CEL variants and found that 74.3% of missense mutations were located in exons 1, 3, 4, 10 and 11 and most missense variants clustered near catalytic triad, Arg-83 and Arg-443. CONCLUSION: Our study identified five novel CEL variants in patients with different subtypes of diabetes, expanding the gene mutation spectrum of CEL and confirmed the pathogenicity of several novel variants.
ESTHER : Wu_2023_BMJ.Open.Diabetes.Res.Care_11_e003127
PubMedSearch : Wu_2023_BMJ.Open.Diabetes.Res.Care_11_e003127
PubMedID: 36634979
Gene_locus related to this paper: human-CEL

Title : Palmitoyltransferase DHHC9 and acyl protein thioesterase APT1 modulate renal fibrosis through regulating beta-catenin palmitoylation - Gu_2023_Nat.Commun_14_6682
Author(s) : Gu M , Jiang H , Tan M , Yu L , Xu N , Li Y , Wu H , Hou Q , Dai C
Ref : Nat Commun , 14 :6682 , 2023
Abstract : Palmitoylation, a reversible post-translational modification, is initiated by the DHHC family of palmitoyltransferases and reversed by several acyl protein thioesterases. However, the role and mechanisms for protein palmitoylation in renal fibrosis have not been elucidated. Here we show protein palmitoylation and DHHC9 were downregulated in the fibrotic kidneys of mouse models and chronic kidney disease (CKD) patients. Ablating DHHC9 in tubular cells aggravated, while inducing DHHC9 overexpression with adeno-DHHC9 transfection or iproniazid treatment protected against kidney fibrosis in male mouse models. Mechanistically, DHHC9 palmitoylated beta-catenin, thereby promoted its ubiquitination and degradation. Additionally, acyl protein thioesterase 1 (APT1) was induced in the fibrotic kidneys, which depalmitoylated beta-catenin, increased its abundance and nuclear translocation. Ablating tubular APT1 or inhibiting APT1 with ML348 markedly protected against unilateral ureter obstruction (UUO) or ischemia/reperfusion injury (IRI)-induced kidney fibrosis in male mice. This study reveals the regulatory mechanism of protein palmitoylation in kidney fibrosis.
ESTHER : Gu_2023_Nat.Commun_14_6682
PubMedSearch : Gu_2023_Nat.Commun_14_6682
PubMedID: 37865665
Gene_locus related to this paper: human-LYPLA1

Title : Toxicological mechanism of cadmium in the clam Ruditapes philippinarum using combined ionomic, metabolomic and transcriptomic analyses - Zhang_2023_Environ.Pollut__121286
Author(s) : Zhang X , Li F , Ji C , Wu H
Ref : Environ Pollut , :121286 , 2023
Abstract : Cadmium (Cd) contamination in marine environment poses great risks to the organisms due to its potential adverse effects. In the present study, the toxicological effects and mechanisms of Cd at environmentally relevant concentrations (5 and 50 microg/L) on clam Ruditapes philippinarum after 21 days were investigated by combined ionomic, metabolomic, and transcriptomic analyses. Results showed that the uptake of Cd significantly decreased the concentrations of Cu, Zn, Sr, Se, and Mo in the whole soft tissue from 50 microg/L Cd-treated clams. Significantly negative correlations were observed between Cd and essential elements (Zn, Sr, Se, and Mo). Altered essential elements homeostasis was associated with the gene regulation of transport and detoxification, including ATP-binding cassette protein subfamily B member 1 (ABCB1) and metallothioneins (MT). The crucial contribution of Se to Cd detoxification was also found in clams. Additionally, gene set enrichment analysis showed that Cd could interfere with proteolysis by peptidases and decrease the translation efficiency at 50 microg/L. Cd inhibited lipid metabolism in clams and increased energy demand by up-regulating glycolysis and TCA cycle. Osmotic pressure was regulated by free amino acids, including alanine, glutamate, taurine, and homarine. Meanwhile, significant alterations of some differentially expressed genes, such as dopamine-beta-hydroxylase (DBH), neuroligin (NLGN), NOTCH 1, and chondroitin sulfate proteoglycan 1 (CSPG1) were observed in clams, which implied potential interference with synaptic transmission. Overall, through integrating multiple omics, this study provided new insights into the toxicological mechanisms of Cd, particularly in those mediated by dysregulation of essential element homeostasis.
ESTHER : Zhang_2023_Environ.Pollut__121286
PubMedSearch : Zhang_2023_Environ.Pollut__121286
PubMedID: 36791949

Title : Polysaccharide from Polygala tenuifolia alleviates cognitive decline in Alzheimer's disease mice by alleviating Abeta damage and targeting the ERK pathway - Li_2023_J.Ethnopharmacol__117564
Author(s) : Li Y , Wu H , Liu M , Zhang Z , Ji Y , Xu L , Liu Y
Ref : J Ethnopharmacol , :117564 , 2023
Abstract : ETHNOPHARMACOLOGICAL RELEVANCE: Polygala tenuifolia is used in a variety of Chinese medicine prescriptions for the classic dementia treatment, and polysaccharide is an important active component in the herb. AIM OF THE STUDY: This study investigated the in vivo anti-Alzheimer's disease (AD) activity of the polysaccharide PTPS from Polygala tenuifolia using the senescence-accelerated mouse/prone8 (SAMP8) model and explored its molecular mechanism to lay the foundation for the development of polysaccharide-based anti-AD drugs. MATERIALS AND METHODS: The Morris water maze test (MWM)was used to detect changes in the spatial cognitive ability of mice, and Nissl staining was applied to observe the state of neurons in the classic hippocampus. The levels of acetylcholine (ACh) and acetylcholinesterase (AChE) were measured by ELISA. Immunofluorescence was used to reflect beta-amyloid (Abeta) levels in brain tissue. Apoptosis was evaluated by TdT-mediated dUTP Nick-End Labeling (TUNEL) method. The status of dendritic branches and spines was observed by Golgi staining. Meanwhile, the expression levels of recombinant human insulin-degrading enzyme (IDE), brain-derived neurotrophic factor (BDNF), tyrosine kinase receptor B (TrkB), extracellular regulated protein kinases (ERK), and cAMP-response element binding protein (CREB) proteins were determined by Western blotting. RESULTS: PTPS improves spatial cognitive deficits in AD mice, reduces cellular damage in the CA3 region of the hippocampus, maintains the balance of the cholinergic system, and exerts an anti-AD effect in vivo. The molecular mechanism of its action may be related to the reduction of Abeta deposition as well as the activation of ERK pathway-related proteins with enhanced synaptic plasticity. CONCLUSIONS: PTPS is able to exert anti-AD activity in vivo by mitigating Abeta damage and targeting the ERK pathway.
ESTHER : Li_2023_J.Ethnopharmacol__117564
PubMedSearch : Li_2023_J.Ethnopharmacol__117564
PubMedID: 38081400

Title : Palmatine attenuates LPS-induced neuroinflammation through the PI3K\/Akt\/NF-B pathway - Zeng_2023_J.Biochem.Mol.Toxicol__e23544
Author(s) : Zeng J , Pei H , Wu H , Chen W , Du R , He Z
Ref : J Biochem Mol Toxicol , :e23544 , 2023
Abstract : To investigate the key molecular mechanisms of palmatine for the treatment of neuroinflammation through modulation of a pathway using molecular docking, molecular dynamics (MD) simulation combined with network pharmacology, and animal experiments. Five alkaloid components were obtained from the traditional Chinese medicine Huangteng through literature mining. Molecular docking and MD simulation with acetylcholinesterase were used to screen palmatine. At the animal level, mice were injected with LPS intracerebrally to cause a neuroinflammatory model, and the Morris water maze experiment was performed to examine the learning memory of mice. Anxiety levels were tested using the autonomous activity behavior experiment with the open field and elevated behavior experiments. HE staining and Niss staining were performed on brain tissue sections to observe morphological lesions and apoptosis; serum was examined for inflammatory factors TNF-alpha, IL-6, and IL-1beta; Western blot was performed to detect the protein expression. The expression of PI3K/AKT/NFkB signaling pathway-related proteins was examined by Western blot. The results of network pharmacology showed that the screening of palmatine activation containing the PI3K/Akt/NFkB signaling pathway exerts antineuroinflammatory effects. Results from behavioral experiments showed that Pal enhanced learning memory in model mice, improved anxiety behavior, and significantly improved brain damage caused by neuroinflammation. The results of HE staining and Niss staining of brain tissue sections showed that palmatine could alleviate morphological lesions and nucleus damage in brain tissue. Palmatine improved the levels of serum inflammatory factors TNF-alpha, IL-6, and IL-1beta. SOD, MDA, CAT, ACH, and ACHE in the hippocampus were improved. Western blot results showed that palmatine administration ameliorated LPS-induced neuroinflammation through the PI3K/Akt/NFkB pathway.
ESTHER : Zeng_2023_J.Biochem.Mol.Toxicol__e23544
PubMedSearch : Zeng_2023_J.Biochem.Mol.Toxicol__e23544
PubMedID: 37815058

Title : Identification of genes related to glucose metabolism and analysis of the immune characteristics in Alzheimer's disease - Wang_2023_Brain.Res_1819_148545
Author(s) : Wang Y , Shen Z , Wu H , Yu Z , Wu X , Zhou L , Guo F
Ref : Brain Research , 1819 :148545 , 2023
Abstract : OBJECTIVE: Glucose metabolism plays a crucial role in the progression of Alzheimer's disease (AD). The purpose of this study is to identify genes related to glucose metabolism in AD by bioinformatics, construct an early AD prediction model from the perspective of glucose metabolism, and analyze the characteristics of immune cell infiltration. METHODS: AD-related modules and genes were screened by weighted gene co-expression network analysis (WGCNA). The GO and KEEG enrichment analysis were used to explore the potential biological functions of glucose metabolism related genes (GMRGs) in AD. The Least Absolute Shrinkage Selection Operator (LASSO) method was used to construct an early AD prediction model based on GMRGs. Then, the receiver operating characteristic curve (ROC) and nomogram were introduced to evaluate the effectiveness of this model. Finally, CIBERSORT and single-cell analysis were applied for illustrating the immune characteristics in AD patients. RESULTS: A total of 462 differential expressed genes (DEGs) were obtained between Non-Alzheimer's disease (ND,) and AD groups. The genes in the blue module had the highest correlation with AD by WGCNA analysis. We found 18 intersected genes among DEGs, blue model genes and GMRGs according to the Venn diagram. The GO and KEEG enrichment analysis showed that these 18 genes were mainly involved in the production of metabolites and energy, glycolysis, amino acid biosynthesis and so on. The early AD prediction model including ENO2, TPI1, AEBP1, HERC1, PCSK1, PREPL, SLC25A4, UQCRC2, CHST6, DDIT4, ACSS1 and SUCLA2 was constructed by LASSO analysis. The area under the curve (AUC) of this model in brain tissues was 0.942. Then, we draw the nomogram of this model and the C-index was 0.942. The model was further validated in blood samples and the AUC was 0.644. Immune cell infiltration analysis showed that the proportion of plasma cells, T cells follicular helper and activated NK cells in AD group were significantly lower than ND group, while the proportion of M1 macrophages, neutrophils, T cells CD4 naive and gamma-delta T cells was significantly increased when compared with the ND group. Additionally, the specific GMRGs such as ENO2, DDIT4, and SUCLA2 are significantly correlated with certain immune cells such as plasma cells, follicular helper T cells, and M1 macrophages. Single-cell analysis results suggested that the increased macrophages in AD was associated with the up-regulation of AEBP1, DDIT4 and ACSS1. CONCLUSIONS: The diagnosis model based on the twelve GMRGs has strong predictive ability and can be used as early diagnosis biomarkers for AD. In addition, these GMRGs closely associate with AD development by influencing the glucose metabolism of immune cells.
ESTHER : Wang_2023_Brain.Res_1819_148545
PubMedSearch : Wang_2023_Brain.Res_1819_148545
PubMedID: 37619853

Title : Insights into the Effects of Insecticides on Aphids (Hemiptera: Aphididae): Resistance Mechanisms and Molecular Basis - Kaleem_2023_Int.J.Mol.Sci_24_
Author(s) : Kaleem Ullah RM , Gao F , Sikandar A , Wu H
Ref : Int J Mol Sci , 24 : , 2023
Abstract : With the passage of time and indiscreet usage of insecticides on crops, aphids are becoming resistant to their effect. The different classes of insecticides, including organophosphates, carbamates, pyrethroids and neonicotinoids, have varied effects on insects. Furthermore, the molecular effects of these insecticides in aphids, including effects on the enzymatic machinery and gene mutation, are resulting in aphid resistance to the insecticides. In this review, we will discuss how aphids are affected by the overuse of pesticides, how resistance appears, and which mechanisms participate in the resistance mechanisms in various aphid species as significant crop pests. Gene expression studies were analyzed using the RNA-Seq technique. The stress-responsive genes were analyzed, and their expression in response to insecticide administration was determined. Putative insecticide resistance-related genes, cytochrome P450, glutathione S-transferase, carboxylesterase CarEs, ABC transporters, cuticle protein genes, and trypsin-related genes were studied. The review concluded that if insecticide-susceptible aphids interact with ample dosages of insecticides with sublethal effects, this will result in the upregulation of genes whose primary role is to detoxify insecticides. In the past decade, certain advancements have been observed regarding insecticide resistance on a molecular basis. Even so, not much is known about how aphids detoxify the insecticides at molecular level. Thus, to attain equilibrium, it is important to observe the manipulation of pest and insect species with the aim of restoring susceptibility to insecticides. For this purpose, this review has included critical insights into insecticide resistance in aphids.
ESTHER : Kaleem_2023_Int.J.Mol.Sci_24_
PubMedSearch : Kaleem_2023_Int.J.Mol.Sci_24_
PubMedID: 37047722

Title : Loss-of-Function Homozygous Variant in LPL Causes Type I Hyperlipoproteinemia and Renal Lipidosis - Wu_2023_Kidney.Int.Rep_8_2428
Author(s) : Wu H , Xu H , Lei S , Yang Z , Yang S , Du J , Zhou Y , Liu Y , Yang Y , Hu Z
Ref : Kidney Int Rep , 8 :2428 , 2023
Abstract : INTRODUCTION: Lipoprotein lipase (LPL) is an important enzyme in lipid metabolism, individuals with LPL gene variants could present type I hyperlipoproteinemia, lipemia retinalis, hepatosplenomegaly, and pancreatitis. To date, there are no reports of renal lipidosis induced by type I hyperlipoproteinemia due to LPL mutation. METHODS: Renal biopsy was conducted to confirm the etiological factor of nephrotic syndrome in a 44-year-old Chinese man. Lipoprotein electrophoresis, apoE genotype detection, and whole-exome sequencing were performed to confirm the dyslipidemia type and genetic factor. Analysis of the 3-dimensional protein structure and in vitro functional study were conducted to verify variant pathogenicity. RESULTS: Renal biopsy revealed numerous CD68 positive foam cells infiltrated in the glomeruli; immunoglobulin and complement staining were negative; and electron microscopy revealed numerous lipid droplets and cholesterol clefts in the cytoplasm of foam cells. Lipoprotein electrophoresis revealed that the patient fulfilled the diagnostic criteria of type I hyperlipoproteinemia. The apoE genotype of the patient was the sigma3/sigma3 genotype. Whole-exome sequencing revealed an LPL (c.292G > A, p.A98T) homozygous variant with alpha-helix instability and reduced post-heparin LPL activity but normal lipid uptake capability compared to the wild-type variant. CONCLUSION: LPL (c.292G > A, p.A98T) is a pathogenic variant that causes renal lipidosis associated with type I hyperlipoproteinemia. This study provides adequate evidence of the causal relationship between dyslipidemia and renal lesions. However, further research is needed to better understand the pathogenetic mechanism of LPL variant-related renal lesions.
ESTHER : Wu_2023_Kidney.Int.Rep_8_2428
PubMedSearch : Wu_2023_Kidney.Int.Rep_8_2428
PubMedID: 38025240
Gene_locus related to this paper: human-LPL

Title : ACh signaling modulates activity of the GABAergic signaling network in the basolateral amygdala and behavior in stress-relevant paradigms - Mineur_2022_Mol.Psychiatry_27_4918
Author(s) : Mineur YS , Mose TN , Maibom KL , Pittenger ST , Soares AR , Wu H , Taylor SR , Huang Y , Picciotto MR
Ref : Mol Psychiatry , 27 :4918 , 2022
Abstract : The balance between excitatory and inhibitory (E/I) signaling is important for maintaining homeostatic function in the brain. Indeed, dysregulation of inhibitory GABA interneurons in the amygdala has been implicated in human mood disorders. We hypothesized that acetylcholine (ACh) signaling in the basolateral amygdala (BLA) might alter E/I balance resulting in changes in stress-sensitive behaviors. We therefore measured ACh release as well as activity of calmodulin-dependent protein kinase II (CAMKII)-, parvalbumin (PV)-, somatostatin (SOM)- and vasoactive intestinal protein (VIP)-expressing neurons in the BLA of awake, behaving male mice. ACh levels and activity of both excitatory and inhibitory BLA neurons increased when animals were actively coping, and decreased during passive coping, in the light-dark box, tail suspension and social defeat. Changes in neuronal activity preceded behavioral state transitions, suggesting that BLA activity may drive the shift in coping strategy. In contrast to exposure to escapable stressors, prolonging ACh signaling with a cholinesterase antagonist changed the balance of activity among BLA cell types, significantly increasing activity of VIP neurons and decreasing activity of SOM cells, with little effect on CaMKII or PV neurons. Knockdown of alpha7 or beta2-containing nAChR subtypes in PV and SOM, but not CaMKII or VIP, BLA neurons altered behavioral responses to stressors, suggesting that ACh signaling through nAChRs on GABA neuron subtypes contributes to stress-induced changes in behavior. These studies show that ACh modulates the GABAergic signaling network in the BLA, shifting the balance between SOM, PV, VIP and CaMKII neurons, which are normally activated coordinately during active coping in response to stress. Thus, prolonging ACh signaling, as occurs in response to chronic stress, may contribute to maladaptive behaviors by shifting the balance of inhibitory signaling in the BLA.
ESTHER : Mineur_2022_Mol.Psychiatry_27_4918
PubMedSearch : Mineur_2022_Mol.Psychiatry_27_4918
PubMedID: 36050437

Title : Pisa syndrome in dementia with Lewy bodies: A Chinese multicenter study - Su_2022_Parkinsonism.Relat.Disord_103_50
Author(s) : Su Z , Liu S , Chen G , Gan J , Bao X , Zhu H , Wang X , Wu H , Ji Y
Ref : Parkinsonism Relat Disord , 103 :50 , 2022
Abstract : BACKGROUND: Pisa syndrome (PS) is rarely reported in Dementia with Lewy bodies (DLB). The aim of this article is to investigate the prevalence rate of PS and the correlation with clinical features evaluated in patients with DLB. METHODS: A total of 209 DLB patients were consecutively recruited and underwent standardized clinical evaluation in our multicenter study. The associations between PS and clinical factors were evaluated. RESULTS: The prevalence rate of PS in patients with DLB was 15.3%, which was higher in the moderate and severe stages than mild cognitive impairment and mild stages (81.2% vs. 18.8%). Patients with PS had a longer duration of disease (P = 0.020) and parkinsonism (P = 0.003), higher scores of NPI (P = 0.028), ADL (P = 0.002) and UPDRS part III (P < 0.001), lower scores of clock drawing test (P = 0.009), visuospatial/executive abilities (P = 0.018), attention (P = 0.020), language and praxis (P = 0.020), registration (P = 0.012), greater H&Y stage (P < 0.001), and higher proportion of cholinesterase inhibitors used (P = 0.044) than those without PS. Longer disease duration (OR = 1.166, P = 0.023), presence of parkinsonism (OR = 7.971, P = 0.007), moderate and severe dementia (OR = 3.215, P = 0.021) were associated with the presence of PS. Patients had a longer duration of PS (P = 0.014) and lower mean age of onset (P = 0.040) in the group with severe lateral trunk flexion. CONCLUSION: The development of PS may be associated with longer disease duration, the presence of parkinsonism and severe stages of dementia in DLB. Cholinesterase inhibitors may have a correlation with PS. The severity of lateral flexion is related to the duration of PS and mean age of onset.
ESTHER : Su_2022_Parkinsonism.Relat.Disord_103_50
PubMedSearch : Su_2022_Parkinsonism.Relat.Disord_103_50
PubMedID: 36041278

Title : Fine mapping of powdery mildew resistance gene MlWE74 derived from wild emmer wheat (Triticum turgidum ssp. dicoccoides) in an NBS-LRR gene cluster - Zhu_2022_Theor.Appl.Genet__
Author(s) : Zhu K , Li M , Wu H , Zhang D , Dong L , Wu Q , Chen Y , Xie J , Lu P , Guo G , Zhang H , Zhang P , Li B , Li W , Wang Q , Zhu J , Hu W , Guo L , Wang R , Yuan C , Li H , Liu Z , Hua W
Ref : Theor Appl Genet , : , 2022
Abstract : Powdery mildew resistance gene MlWE74, originated from wild emmer wheat accession G-748-M, was mapped in an NBS-LRR gene cluster of chromosome 2BS. Wheat powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is a globally devastating disease. Wild emmer wheat (Triticum turgidum var. dicoccoides) is a valuable genetic resource for improving disease resistance in common wheat. A powdery mildew resistance gene was transferred to hexaploid wheat line WE74 from wild emmer accession G-748-M. Genetic analysis revealed that the powdery mildew resistance in WE74 is controlled by a single dominant gene, herein temporarily designated MlWE74. Bulked segregant analysis (BSA) and molecular mapping delimited MlWE74 to the terminal region of chromosome 2BS flanking by markers WGGBD412 and WGGBH346 within a genetic interval of 0.25 cM and corresponding to 799.9 kb genomic region in the Zavitan reference sequence. Sequence annotation revealed two phosphoglycerate mutase-like genes, an alpha/beta-hydrolases gene, and five NBS-LRR disease resistance genes that could serve as candidates for map-based cloning of MlWE74. The geographical location analysis indicated that MlWE74 is mainly distributed in Rosh Pinna and Amirim regions, in the northern part of Israel, where environmental conditions are favorable to the occurrence of powdery mildew. Moreover, the co-segregated marker WGGBD425 is helpful in marker-assisted transfer of MlWE74 into elite cultivars.
ESTHER : Zhu_2022_Theor.Appl.Genet__
PubMedSearch : Zhu_2022_Theor.Appl.Genet__
PubMedID: 35006335

Title : Toxicological effects of tris(1,3-dichloro-2-propyl) phosphate in oyster Crassostrea gigas using proteomic and phosphoproteomic analyses - Yin_2022_J.Hazard.Mater_434_128824
Author(s) : Yin C , Sun Z , Ji C , Li F , Wu H
Ref : J Hazard Mater , 434 :128824 , 2022
Abstract : As a typical organophosphorus pollutant, tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) has been widely detected in aquatic environment. Previous studies showed that protein phosphorylation might be a vital way of TDCIPP to exert multiple toxic effects. However, there is a lack of high-throughput investigations on how TDCIPP affected protein phosphorylation. In this study, the toxicological effects of TDCIPP were explored by proteomic and phosphoproteomic analyses together with traditional means in oysters Crassostrea gigas treated with 0.5, 5 and 50 microg/L TDCIPP for 28 days. Integration of omic analyses revealed that TDCIPP dysregulated transcription, energy metabolism, and apoptosis and cell proliferation by either directly phosphorylating pivotal proteins or phosphorylating their upstream signaling pathways. The U-shaped response of acetylcholinesterase activities suggested the neurotoxicity of TDCIPP in a hormesis manner. What's more, the increase in caspase-9 activity as well as the expression or phosphorylation alterations in eukaryotic translation initiation factor 4E, cell division control protein 42 and transforming growth factor-beta1-induced protein indicated the disruption of homeostasis between apoptosis and cell proliferation, which was consistent with the observation of shedding of digestive cells. Overall, combination of proteomic and phosphoproteomic analyses showed the capability of identifying molecular events, which provided new insights into the toxicological mechanisms of TDCIPP.
ESTHER : Yin_2022_J.Hazard.Mater_434_128824
PubMedSearch : Yin_2022_J.Hazard.Mater_434_128824
PubMedID: 35427976

Title : The strigolactone receptor SlDWARF14 plays a role in photosynthetic pigment accumulation and photosynthesis in tomato - Li_2022_Plant.Cell.Rep_41_2089
Author(s) : Li Z , Pi Y , Zhai C , Xu D , Ma W , Chen H , Li Y , Wu H
Ref : Plant Cell Rep , 41 :2089 , 2022
Abstract : Tomato DWARF14 regulates the development of roots, shoot branches and leaves, and also plays a role in photosynthetic pigment accumulation and photosynthetic capacity. Strigolactones (SLs) are a novel class of plant hormones. DWARF14 (D14) is the only SL receptor identified to date, but it is not functionally analyzed in tomato (Solanum lycopersicum). In the present study, we identified the potential SL receptor in tomato by bioinformatic analysis, which was designated as SlD14. SlD14 was expressed in roots, stems, flowers and developing fruits, with the highest expression level in leaves. sld14 mutant plants produced by the CRISPR/Cas9 system displayed reduced plant height and root biomass, increased shoot branching and altered leaf shape comparing with WT plants. The cytokinin biosynthetic gene ISOPENTENYLTRANSFERASE 3 (SlIPT3), auxin biosynthetic genes FLOOZY (SlFZY) and TRYPTOPHAN AMINOTRANSFERASE RELATED 1 (SlTAR1) and several auxin transport genes SlPINs, which are involved in branch formation, showed higher expression levels in the sld14 plant stem. In addition, sld14 plants exhibited light-green leaves, reduced chlorophyll and carotenoid contents, abnormal chloroplast structure and reduced photosynthetic capacity. Transcriptomic analysis showed that the transcript levels of six chlorophyll biosynthetic genes, three carotenoid biosynthetic genes and numerous chlorophyll a/b-binding protein genes were decreased in sld14 plants. These results suggest that tomato SL receptor gene SlD14 not only regulates the development of roots, shoot branches and leaves, but also plays a role in regulating photosynthetic pigment accumulation and photosynthetic capacity.
ESTHER : Li_2022_Plant.Cell.Rep_41_2089
PubMedSearch : Li_2022_Plant.Cell.Rep_41_2089
PubMedID: 35907035

Title : Preventive Effect of Limosilactobacillus fermentum SCHY34 on Lead Acetate-Induced Neurological Damage in SD Rats - Long_2022_Front.Nutr_9_852012
Author(s) : Long X , Wu H , Zhou Y , Wan Y , Kan X , Gong J , Zhao X
Ref : Front Nutr , 9 :852012 , 2022
Abstract : Lead poisoning caused by lead pollution seriously affects people's health. Lactic acid bacteria has been shown to be useful for biological scavenging of lead. In this experiment, Sprague-Dawley (SD) rats were treated with 200 mg/L of lead acetate solution daily to induce chronic lead poisoning, and oral Limosilactobacillus fermentum (L. fermentum) SCHY34 to study its mitigation effects and mechanisms on rat neurotoxicity. The L. fermentum SCHY34 showed competent results on in vitro survival rate and the lead ion adsorption rate. Animal experiments showed that L. fermentum SCHY34 maintained the morphology of rat liver, kidney, and hippocampi, reduced the accumulation of lead in the blood, liver, kidney, and brain tissue. Further, L. fermentum SCHY34 alleviated the lead-induced decline in spatial memory and response capacity of SD rats, and also regulated the secretion of neurotransmitters and related enzyme activities in the brain tissue of rats, such as glutamate (Glu), monoamine oxidase (MAO), acetylcholinesterase (AchE), cyclic adenosine monophosphate (cAMP), and adenylate cyclase (AC). In addition, the expression of genes related to cognitive capacity, antioxidation, and anti-apoptotic in rat brain tissues were increased L. fermentum SCHY34 treatment, such as brain-derived neurotrophic factor (BDNF), c-fos, c-jun, superoxide dismutase (SOD)1/2, Nuclear factor erythroid 2-related factor 2 (Nrf2), and B-cell lymphoma 2 (Bcl-2), and so on. L. fermentum SCHY34 showed a great biological scavenging and potential effect on alleviating the toxicity of lead ions.
ESTHER : Long_2022_Front.Nutr_9_852012
PubMedSearch : Long_2022_Front.Nutr_9_852012
PubMedID: 35571929

Title : 5-Methyltetrahydrofolate Alleviates Memory Impairment in a Rat Model of Alzheimer's Disease Induced by D-Galactose and Aluminum Chloride - Zhang_2022_Int.J.Environ.Res.Public.Health_19_
Author(s) : Zhang Z , Wu H , Qi S , Tang Y , Qin C , Liu R , Zhang J , Cao Y , Gao X
Ref : Int J Environ Research Public Health , 19 : , 2022
Abstract : The effects of 5-methyltetrahydrofolate (5-MTHF) on a rat model of Alzheimer's disease (AD) induced by D-galactose (D-gal) and aluminum chloride (AlCl(3)) were investigated. Wistar rats were given an i.p. injection of 60 mg/kg D-gal and 10 mg/kg AlCl(3) to induce AD and three doses of 1 mg/kg, 5 mg/kg or 10 mg/kg 5-MTHF by oral gavage. A positive control group was treated with 1 mg/kg donepezil by gavage. Morris water maze performance showed that 5 and 10 mg/kg 5-MTHF significantly decreased escape latency and increased the number of platform crossings and time spent in the target quadrant for AD rats. The administration of 10 mg/kg 5-MTHF decreased the brain content of amyloid beta-protein 1-42 (Abeta(1-42)) and phosphorylated Tau protein (p-Tau) and decreased acetylcholinesterase and nitric oxide synthase activities. Superoxide dismutase activity, vascular endothelial growth factor level and glutamate concentration were increased, and malondialdehyde, endothelin-1, interleukin-6, tumor necrosis factor-alpha and nitric oxide decreased. The administration of 10 mg/kg 5-MTHF also increased the expression of disintegrin and metallopeptidase domain 10 mRNA and decreased the expression of beta-site amyloid precursor protein cleavage enzyme 1 mRNA. In summary, 5-MTHF alleviates memory impairment in a D-gal- and AlCl(3)-exposed rat model of AD. The inhibition of Abeta(1-42) and p-Tau release, reduced oxidative stress, the regulation of amyloid precursor protein processing and the release of excitatory amino acids and cytokines may be responsible.
ESTHER : Zhang_2022_Int.J.Environ.Res.Public.Health_19_
PubMedSearch : Zhang_2022_Int.J.Environ.Res.Public.Health_19_
PubMedID: 36554305

Title : Could AlphaFold revolutionize chemical therapeutics? -
Author(s) : Tong AB , Burch JD , McKay D , Bustamante C , Crackower MA , Wu H
Ref : Nat Struct Mol Biol , 28 :771 , 2021
PubMedID: 34561631

Title : Platelet activating-factor acetylhydrolase II: A member of phospholipase A2 family that hydrolyzes oxidized phospholipids - Dong_2021_Chem.Phys.Lipids_239_105103
Author(s) : Dong L , Li Y , Wu H
Ref : Chemistry & Physic of Lipids , 239 :105103 , 2021
Abstract : Intracellular platelet activating-factor acetylhydrolase type II (PAF-AH II) is a 40-kDa monomeric enzyme. It was originally identified as an enzyme that hydrolyzes the acetyl group of PAF (1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine). As a member of phospholipase A2 super family, PAF-AH II has broad substrate specificity. It can hydrolyze phospholipids with relatively short-length or oxidatively modified sn-2 chains which endows it with various functions such as protection against oxidative stress, transacetylase activity and producing lipid mediators. PAF-AH II has been proven to be involved in several diseases such as allergic diseases, oxidative stress-induced injury and ischemia injury, thus it has drawn more attention from researchers. In this paper, we outline an entire summary of PAF-AH II, including its structure, substrate specificity, activity assay, inhibitors and biological activities.
ESTHER : Dong_2021_Chem.Phys.Lipids_239_105103
PubMedSearch : Dong_2021_Chem.Phys.Lipids_239_105103
PubMedID: 34116047
Gene_locus related to this paper: human-PAFAH2

Title : Ultrasmall Au nanoparticles modified 2D metalloporphyrinic metal-organic framework nanosheets with high peroxidase-like activity for colorimetric detection of organophosphorus pesticides - Yang_2021_Food.Chem_376_131906
Author(s) : Yang H , Sun Z , Qin X , Wu H , Zhang H , Liu G
Ref : Food Chem , 376 :131906 , 2021
Abstract : Ultrasmall Au nanoparticles (UsAuNPs) in the size range of 4.0-7.0 nm was successfully immobilized on the surface of 2D metalloporphyrinic metal-organic framework nanosheets (2D MOF). Firstly, The obtained hybrid nanomaterial, UsAuNPs/2D MOF, was fully characterized by TEM, HRTEM, element mapping images and XPS. Then, the peroxidase-like activity of UsAuNPs/2D MOF was comparatively studied with other hybrid nanozyme to explore the influence of AuNPs size on peroxidase-like activity. Further, UsAuNPs/2D MOF with outstanding peroxidase-like activity was selected to form ternary cascade enzyme reaction with acetylcholinesterase (AChE) and choline oxidase (ChOx). Based on the inhibitory effect of organophosphorus pesticides on AChE, a fast and sensitive colorimetric method was established for trichlorfon detection with the advantages of simple operation, low detection limit (1.7 microM), good linear range (1.7-42.4 microM) and high accuracy (recovery rate of 96.6-105.3%). Finally, this method was applied to visual analysis of trichlorfon concentration in tomatoes, cucumbers and eggplants.
ESTHER : Yang_2021_Food.Chem_376_131906
PubMedSearch : Yang_2021_Food.Chem_376_131906
PubMedID: 34968912

Title : Fabrication of Nano\/Micro-Structured Electrospun Detection Card for the Detection of Pesticide Residues - Feng_2021_Foods_10_
Author(s) : Feng K , Zhai MY , Wei YS , Zong MH , Wu H , Han SY
Ref : Foods , 10 : , 2021
Abstract : A novel nano/micro-structured pesticide detection card was developed by combining electrospinning and hydrophilic modification, and its feasibility for detecting different pesticides was investigated. Here, the plain and hydrophilic-modified poly(sigma-caprolactone) (PCL) fiber mats were used for the absorption of indolyl acetate and acetylcholinesterase (AChE), respectively. By pre-treating the fiber mat with ethanol, its surface wettability was improved, thus, promoting the hydrolysis of the PCL fiber mat. Furthermore, the absorption efficiency of AChE was improved by almost two times due to the increased hydrophilicity of the modified fiber mat. Noteworthily, this self-made detection card showed a 5-fold, 2-fold, and 1.5-fold reduction of the minimum detectable concentration for carbofuran, malathion, and trichlorfon, respectively, compared to the national standard values. Additionally, it also exhibited good stability when stored at 4 degreesC and room temperature. The food detection test showed that this nano/micro-based detection card had better detectability than the commercial detection card. Therefore, this study offers new insights into the design of pesticide detection cards, which also broadens the application of electrospinning technique.
ESTHER : Feng_2021_Foods_10_
PubMedSearch : Feng_2021_Foods_10_
PubMedID: 33921560

Title : DPP9 sequesters the C terminus of NLRP1 to repress inflammasome activation - Hollingsworth_2021_Nature_592_778
Author(s) : Hollingsworth LR , Sharif H , Griswold AR , Fontana P , Mintseris J , Dagbay KB , Paulo JA , Gygi SP , Bachovchin DA , Wu H
Ref : Nature , 592 :778 , 2021
Abstract : Nucleotide-binding domain and leucine-rich repeat pyrin-domain containing protein 1 (NLRP1) is an inflammasome sensor that mediates the activation of caspase-1 to induce cytokine maturation and pyroptosis(1-4). Gain-of-function mutations of NLRP1 cause severe inflammatory diseases of the skin(4-6). NLRP1 contains a function-to-find domain that auto-proteolyses into noncovalently associated subdomains(7-9), and proteasomal degradation of the repressive N-terminal fragment of NLRP1 releases its inflammatory C-terminal fragment (NLRP1 CT)(10,11). Cytosolic dipeptidyl peptidases 8 and 9 (hereafter, DPP8/DPP9) both interact with NLRP1, and small-molecule inhibitors of DPP8/DPP9 activate NLRP1 by mechanisms that are currently unclear(10,12-14). Here we report cryo-electron microscopy structures of the human NLRP1-DPP9 complex alone and with Val-boroPro (VbP), an inhibitor of DPP8/DPP9. The structures reveal a ternary complex that comprises DPP9, full-length NLRP1 and the NLRPT CT. The binding of the NLRP1 CT to DPP9 requires full-length NLRP1, which suggests that NLRP1 activation is regulated by the ratio of NLRP1 CT to full-length NLRP1. Activation of the inflammasome by ectopic expression of the NLRP1 CT is consistently rescued by co-expression of autoproteolysis-deficient full-length NLRP1. The N terminus of the NLRP1 CT inserts into the DPP9 active site, and VbP disrupts this interaction. Thus, VbP weakens the NLRP1-DPP9 interaction and accelerates degradation of the N-terminal fragment(10) to induce inflammasome activation. Overall, these data demonstrate that DPP9 quenches low levels of NLRP1 CT and thus serves as a checkpoint for activation of the NLRP1 inflammasome.
ESTHER : Hollingsworth_2021_Nature_592_778
PubMedSearch : Hollingsworth_2021_Nature_592_778
PubMedID: 33731932
Gene_locus related to this paper: human-DPP9

Title : Dipeptidyl peptidase 9 sets a threshold for CARD8 inflammasome formation by sequestering its active C-terminal fragment - Sharif_2021_Immunity__
Author(s) : Sharif H , Hollingsworth LR , Griswold AR , Hsiao JC , Wang Q , Bachovchin DA , Wu H
Ref : Immunity , : , 2021
Abstract : CARD8 detects intracellular danger signals and forms a caspase-1 activating inflammasome. Like the related inflammasome sensor NLRP1, CARD8 autoprocesses into noncovalently associated N-terminal (NT) and C-terminal (CT) fragments and binds the cellular dipeptidyl peptidases DPP8 and 9 (DPP8/9). Certain danger-associated signals, including the DPP8/9 inhibitor Val-boroPro (VbP) and HIV protease, induce proteasome-mediated NT degradation and thereby liberate the inflammasome-forming CT. Here, we report cryoelectron microscopy (cryo-EM) structures of CARD8 bound to DPP9, revealing a repressive ternary complex consisting of DPP9, full-length CARD8, and CARD8-CT. Unlike NLRP1-CT, CARD8-CT does not interact with the DPP8/9 active site and is not directly displaced by VbP. However, larger DPP8/9 active-site probes can directly weaken this complex in vitro, and VbP itself nevertheless appears to disrupt this complex, perhaps indirectly, in cells. Thus, DPP8/9 inhibitors can activate the CARD8 inflammasome by promoting CARD8 NT degradation and by weakening ternary complex stability.
ESTHER : Sharif_2021_Immunity__
PubMedSearch : Sharif_2021_Immunity__
PubMedID: 34019797
Gene_locus related to this paper: human-DPP9

Title : Structural mechanism of CARD8 regulation by DPP9 - Sharif_2021_Biorxiv__
Author(s) : Sharif H , Hollingsworth LR , Griswold AR , Hsiao JC , Wang QH , Bachovchin DA , Wu H
Ref : Biorxiv , : , 2021
Abstract : CARD8 is a germline-encoded pattern recognition receptor that detects intracellular danger signals. Like the related inflammasome sensor NLRP1, CARD8 undergoes constitutive autoprocessing within its function-to-find domain (FIIND), generating two polypeptides that stay associated and autoinhibited. Certain pathogen-and danger-associated activities, including the inhibition of the serine dipeptidases DPP8 and DPP9 (DPP8/9), induce the proteasome-mediated degradation of the N-terminal(NT) fragment,releasing the C-terminal (CT) fragment to form a caspase-1 activating inflammasome. DPP8/9 also bind directly to the CARD8 FIIND, but the role that this interaction plays in CARD8 inflammasome regulation is not yet understood. Here, we solved several cryo-EM structures of CARD8 bound to DPP9, with or without the DPP inhibitor Val-boroPro (VbP), which revealed a ternary complex composed of one DPP9, the full-length CARD8, and one CARD8-CT. Through structure-guided biochemical and cellular experiments, we demonstrated thatDPP9's structure restrains CARD8-CT after proteasomal degradation. Moreover, although DPP inhibitors do not directly displace CARD8 from DPP9in vitro,we show that they can nevertheless destabilize this complex in cells. Overall, these results demonstrate that DPP8/9 inhibitors cause CARD8 inflammasome activation via at least two distinct mechanisms, one upstream and one downstream of the proteasome.
ESTHER : Sharif_2021_Biorxiv__
PubMedSearch : Sharif_2021_Biorxiv__
Gene_locus related to this paper: human-DPP9

Title : Case Report\/Case Series: Rare case of anti-LGI1 limbic encephalitis with rapidly progressive dementia, psychiatric symptoms, and frequently seizures: A case report - Wu_2021_Medicine.(Baltimore)_100_e26654
Author(s) : Wu H , Mei F , Liu L , Zhang L , Hao H , Zhang S
Ref : Medicine (Baltimore) , 100 :e26654 , 2021
Abstract : RATIONALE: Anti leucine-rich glioma inactivated 1 (LGI1) limbic encephalitis (LE) is rare autoimmune encephalitis, characterized by acute or subacute cognitive impairment, faciobrachial dystonic seizures, mental disorders, and refractory hyponatremia. As a type of treatable rapidly progressive dementia with a good prognosis, early, and accurate diagnosis is essential. We present a case of anti-LGI1 LE who was initially misdiagnosed with Alzheimer disease because his clinical manifestations were similar to Alzheimer disease. PATIENT CONCERNS: A male patient presenting with rapidly progressive dementia, faciobrachial dystonic seizures, psychiatric disturbance, and refractory hyponatremia was admitted. The scores of Mini-Mental State Examination, Montreal Cognitive Assessment, and Neuropsychiatric Inventory were 19/30, 16/30, and 91/144, respectively. Brain magnetic resonance images indicated moderate atrophy of the hippocampus and abnormally hyperintensities in the left medial temporal and hippocampus. DIAGNOSIS: The patient was diagnosed with anti-LGI1 LE based on the presence of LGI-1 antibodies in the cerebrospinal fluid and serum and clinical manifestations. INTERVENTIONS: Patient was treated with glucocorticoid against LGI1, antiepileptic drug, cholinesterase inhibitors, and other adjuvant therapy. OUTCOMES: The patient showed marked improvement on immunotherapy. Clinical symptoms were disappeared and the LGI-1 antibodies in cerebrospinal fluid and serum were both negative at the time of discharge. CONCLUSIONS: Recognition of the specific symptoms and LGI-1 antibody test will be helpful for the early diagnosis, prompt immunotherapy, and good prognosis. This case raises the awareness that rapidly progressive dementia with frequent seizures could be caused by immunoreactions.
ESTHER : Wu_2021_Medicine.(Baltimore)_100_e26654
PubMedSearch : Wu_2021_Medicine.(Baltimore)_100_e26654
PubMedID: 34398024

Title : Differential Effects of 17,18-EEQ and 19,20-EDP Combined with Soluble Epoxide Hydrolase Inhibitor t-TUCB on Diet-Induced Obesity in Mice - Yang_2021_Int.J.Mol.Sci_22_
Author(s) : Yang Y , Xu X , Wu H , Yang J , Chen J , Morisseau C , Hammock BD , Bettaieb A , Zhao L
Ref : Int J Mol Sci , 22 : , 2021
Abstract : 17,18-Epoxyeicosatetraenoic acid (17,18-EEQ) and 19,20-epoxydocosapentaenoic acid (19,20-EDP) are bioactive epoxides produced from n-3 polyunsaturated fatty acid eicosapentaenoic acid and docosahexaenoic acid, respectively. However, these epoxides are quickly metabolized into less active diols by soluble epoxide hydrolase (sEH). We have previously demonstrated that an sEH inhibitor, t-TUCB, decreased serum triglycerides (TG) and increased lipid metabolic protein expression in the brown adipose tissue (BAT) of diet-induced obese mice. This study investigates the preventive effects of t-TUCB (T) alone or combined with 19,20-EDP (T + EDP) or 17,18-EEQ (T + EEQ) on BAT activation in the development of diet-induced obesity and metabolic disorders via osmotic minipump delivery in mice. Both T + EDP and T + EEQ groups showed significant improvement in fasting glucose, serum triglycerides, and higher core body temperature, whereas heat production was only significantly increased in the T + EEQ group. Moreover, both the T + EDP and T + EEQ groups showed less lipid accumulation in the BAT. Although UCP1 expression was not changed, PGC1alpha expression was increased in all three treated groups. In contrast, the expression of CPT1A and CPT1B, which are responsible for the rate-limiting step for fatty acid oxidation, was only increased in the T + EDP and T + EEQ groups. Interestingly, as a fatty acid transporter, CD36 expression was only increased in the T + EEQ group. Furthermore, both the T + EDP and T + EEQ groups showed decreased inflammatory NFkappaB signaling in the BAT. Our results suggest that 17,18-EEQ or 19,20-EDP combined with t-TUCB may prevent high-fat diet-induced metabolic disorders, in part through increased thermogenesis, upregulating lipid metabolic protein expression, and decreasing inflammation in the BAT.
ESTHER : Yang_2021_Int.J.Mol.Sci_22_
PubMedSearch : Yang_2021_Int.J.Mol.Sci_22_
PubMedID: 34361032

Title : FAM172A inhibits EMT in pancreatic cancer via ERK-MAPK signaling - Chen_2020_Biol.Open_9_bio048462
Author(s) : Chen Y , Liu P , Shen D , Liu H , Xu L , Wang J , Sun H , Wu H
Ref : Biol Open , 9 : , 2020
Abstract : FAM172A, as a newly discovered gene, is little known in cancer development, especially in pancreatic cancer (PC). We investigated the potential role and molecular mechanism of FAM172A in epithelial to mesenchymal transition (EMT) in both human clinical samples and PC cells. FAM172A was downregulated in human PC tissues compared with that in non-cancerous pancreas cells by immunohistochemistry and qRT-PCR. FAM172A expression was negatively associated with tumor size (P=0.015), T stage (P=0.006), lymph node metastasis (P=0.028) and the worst prognosis of PC patients (P=0.004). Meanwhile, a positive relationship between FAM172A and E-cadherin (E-cad) (r=0.381, P=0.002) was observed in clinical samples, which contributed to the better prognosis of PC patients (P=0.014). FAM172A silencing induced EMT in both AsPC-1 and BxPC-3 cells, including inducing the increase of Vimentin, MMP9 and pERK and the decrease of E-cad and beta-catenin expression, stimulating EMT-like cell morphology and enhancing cell invasion and migration in PC cells. However, MEK1 inhibitor PD98059 reversed FAM172A silencing-enhanced EMT in PC cells. We conclude that FAM172A inhibits EMT of PC cells via ERK-MAPK signaling.
ESTHER : Chen_2020_Biol.Open_9_bio048462
PubMedSearch : Chen_2020_Biol.Open_9_bio048462
PubMedID: 31988090
Gene_locus related to this paper: human-f172a

Title : Development of a novel nano-based detection card by electrospinning for rapid and sensitive analysis of pesticide residues - Zhai_2020_J.Sci.Food.Agric__
Author(s) : Zhai MY , Feng K , Hu TG , Zong MH , Wu H
Ref : J Sci Food Agric , : , 2020
Abstract : BACKGROUND: Increased awareness of consumers on food safety promotes the development of rapid and sensitive detection techniques for pesticide residues. In this study, a new type of rapid detection card for organophosphorus (OPs) and carbamates (CMs) pesticide residues was developed by electrospinning. The card involved enzyme fiber mat (EFM) and substrate fiber mat (SFM) which were prepared by mixing poly(vinyl alcohol) (PVA) with acetylcholinesterase (AChE) and indolyl acetate (IA), respectively. RESULTS: The mean diameter of fibers was 240+/-53 nm for EFM and 387+/-84 nm for SFM. Results of ATR-FTIR and XPS confirmed that AChE and IA were successfully encapsulated into the fibers. The minimum concentrations of AChE and IA for effective detection were 1 mg/mL and 3 mg/mL, respectively, and the optimal detection time was 15 min. The limits of detection for this card were 0.5 mg/L for omethoate, 1.5 mg/L for malathion, 0.1 mg/L for carbaryl, and 0.02 mg/L for carbofuran. The detection card exhibited good storage stability and its activity can be maintained when stored at room temperature for at least 4 months. Additionally, the EFM can be reused for three times. CONCLUSION: The detection card obtained here was superior to the commercial card in detecting pesticide residues in the real food samples. Hence, this electrospun detection card is potential for simple, rapid and sensitive analysis of pesticide residues. This article is protected by copyright. All rights reserved.
ESTHER : Zhai_2020_J.Sci.Food.Agric__
PubMedSearch : Zhai_2020_J.Sci.Food.Agric__
PubMedID: 32388876

Title : Substrate and inhibitor selectivity, and biological activity of an epoxide hydrolase from Trichoderma reesei - de Oliveira_2019_Mol.Biol.Rep_46_371
Author(s) : de Oliveira GS , Adriani PP , Wu H , Morisseau C , Hammock BD , Chambergo FS
Ref : Mol Biol Rep , 46 :371 , 2019
Abstract : Epoxide hydrolases (EHs) are present in all living organisms and catalyze the hydrolysis of epoxides to the corresponding vicinal diols. EH are involved in the metabolism of endogenous and exogenous epoxides, and thus have application in pharmacology and biotechnology. In this work, we describe the substrates and inhibitors selectivity of an epoxide hydrolase recently cloned from the filamentous fungus Trichoderma reesei QM9414 (TrEH). We also studied the TrEH urea-based inhibitors effects in the fungal growth. TrEH showed high activity on radioative and fluorescent surrogate and natural substrates, especially epoxides from docosahexaenoic acid. Using a fluorescent surrogate substrate, potent inhibitors of TrEH were identified. Interestingly, one of the best compounds inhibit up to 60% of T. reesei growth, indicating an endogenous role for TrEH. These data make TrEH very attractive for future studies about fungal metabolism of fatty acids and possible development of novel drugs for human diseases.
ESTHER : de Oliveira_2019_Mol.Biol.Rep_46_371
PubMedSearch : de Oliveira_2019_Mol.Biol.Rep_46_371
PubMedID: 30426381
Gene_locus related to this paper: hypjq-g0r7e2

Title : Galantamine reversed early postoperative cognitive deficit via alleviating inflammation and enhancing synaptic transmission in mouse hippocampus - Wang_2019_Eur.J.Pharmacol_846_63
Author(s) : Wang T , Zhu H , Hou Y , Gu W , Wu H , Luan Y , Xiao C , Zhou C
Ref : European Journal of Pharmacology , 846 :63 , 2019
Abstract : Postoperative cognitive dysfunction (POCD) is commonly seen in patients undergoing major surgeries and may persist. Although neuroinflammation is one of the important contributors to the development of POCD, the mechanisms underlying POCD remain unclear. We performed stabilized tibial fracture operation in male mice. In comparison with sham mice (anesthesia only), the surgery mice exhibited cognitive deficits in a fear conditioning paradigm at postsurgery day 3-7, and increased numbers of microglia and elevated levels of pro-inflammatory cytokines (IL-1beta, IL-6 and TNF-alpha) without change of anti-inflammatory cytokines (IL-4 and IL-10) in the hippocampus. Electrophysiological recordings from CA1 hippocampal neurons revealed that POCD mice exhibited impairment in AMPA receptor-mediated evoked excitatory postsynaptic currents (eEPSCs) without alteration in the rectification property of AMPA receptors. Interestingly, daily intraperitoneal administration of galantamine, an inhibitor of acetylcholinesterase, reversed cognitive dysfunction in surgery mice and attenuated accumulation of microglia and protein levels of IL-1beta, IL-6 and TNF-alpha in the hippocampus. Additionally, galantamine potentiated AMPA receptor-mediated eEPSCs in the hippocampus more prominent in surgery mice than in sham mice. Therefore, enhancement of cholinergic tone in the hippocampus might be a therapeutic strategy for early POCD in terms of suppression of inflammation and normalization of excitatory synaptic transmission.
ESTHER : Wang_2019_Eur.J.Pharmacol_846_63
PubMedSearch : Wang_2019_Eur.J.Pharmacol_846_63
PubMedID: 30586550

Title : Analysis of the SNP rs3747333 and rs3747334 in NLGN4X gene in autism spectrum disorder: a meta-analysis - Sun_2019_Ann.Gen.Psychiatry_18_6
Author(s) : Sun H , Yang Y , Zhang L , Wu H , Zhang H , Li H
Ref : Ann Gen Psychiatry , 18 :6 , 2019
Abstract : Background: The SNP rs3747333 and rs3747334 in Neuroligin 4X (NLGN4X) gene have been demonstrated to be associated with the susceptibility to Autism spectrum disorder (ASDs; MIM 209850), but the results are inconsistent. Therefore, a meta-analysis of eligible studies reporting the association between rs3747333 and rs3747334 and ASD was carried out to enhance the reliability of published results. Methods: A systematic literature search was performed using PubMed, Web of Science, Cochrane Library to search English articles concerning the relation between rs3747333, rs3747334 and ASD up to Sep. 21th, 2017. Summary odds ratios (OR) and 95% confidence interval (CI) were used to evaluate the risk of rs3747333, rs3747334 in the ASD. The heterogeneity and publication bias of the eligible studies were also evaluated. Results: Six eligible studies involving 1284 subjects (735 patients and 549 healthy controls) were included in this meta-analysis. Overall, the results indicated that there was no significant risk elevation between rs3747333, rs3747334 variants and ASD (OR = 0.39, 95% CI 0.10-1.60). Furthermore, sensitivity analysis and publication bias analysis confirmed this result. Conclusions: In conclusion, our meta-analysis suggests that the rs3747333, rs3747334 in NLGN4X gene are not frequent causes of ASD.
ESTHER : Sun_2019_Ann.Gen.Psychiatry_18_6
PubMedSearch : Sun_2019_Ann.Gen.Psychiatry_18_6
PubMedID: 31139237
Gene_locus related to this paper: human-NLGN4X

Title : One-step orientated immobilization of nanobodies and its application for immunoglobulin purification - Fu_2019_J.Chromatogr.A_1603_15
Author(s) : Fu J , Li J , Wang W , Wu H , Zhou P , Li Y , He Q , Tu Z
Ref : Journal of Chromatography A , 1603 :15 , 2019
Abstract : Affinity chromatography technologies play an important role in the purification of antibodies. To prepare affinity materials, prior isolation and purification of affinity ligands are required before coupling onto solid supports, which is quite expensive and laborious in large-scale applications. In this study, a one-step approach which circumvents the ligand purification procedures was developed to fabricate affinity gel for purifying immunoglobulin G (IgG). A self-labeling tag, haloalkane dehalogenase, was fused to the C-terminal of an anti-Fc variable domain of the heavy chain of the heavy-chain antibody (AFV) which was isolated in previous work. The AFV binds to various sources of IgG and is highly thermal stable. The fusion protein, namely HAFV, was expressed in Escherichia coli as a soluble protein. The binding affinity of HAFV to the Fc region of IgG was characterized and compared with the untagged anti-Fc nanobody. Next, the HAFV was immobilized directly from the crude cell lysate of isopropylthio-beta-D-galactoside (IPTG) induced E. coli. The effects of NaCl concentrations and pH on the capacity of the HAFV resin were investigated. In addition, the one-step coupled HAFV resin was compared with the AFV resin and commercial resins (Protein A and Protein G) by evaluating the static capacity and stability. Though the Protein A (8.34+/-0.37mg/ml) and Protein G (9.19+/-0.28mg/ml) showed higher static capacity, the static capacity of HAFV resin (8.21+/-0.30mg/ml) was better than that of the untagged AFV gel (6.48+/-0.56mg/ml). The recovery results calculated for the reusability and stability show that there is no significant difference between the results obtained for the HAFV gel with those of the untagged AFV gel and commercial Protein A and G. After stored at 37 for 7 days and recycled 10 times, the static capacity of HAFV gel remains above 78%. Our strategy is site-specific, cost-effective, reproducible, and has the potential to dramatically cut down the costs of affinity materials for IgG purification.
ESTHER : Fu_2019_J.Chromatogr.A_1603_15
PubMedSearch : Fu_2019_J.Chromatogr.A_1603_15
PubMedID: 31213362
Gene_locus related to this paper: xanau-halo1

Title : Mechanistic insight into the relationship between triacylglycerol and crystallization of lipase-catalyzed interesterified blend of palm stearin and vegetable oil - Zhu_2018_Food.Chem_260_306
Author(s) : Zhu TW , Weng HT , Zhang X , Wu H , Li B
Ref : Food Chem , 260 :306 , 2018
Abstract : To give a deep insight into the relationship between triacylglycerol and crystallization of interesterified fat, the blends of palm stearin and various vegetable oil were catalyzed by two different immobilized lipases in this study. After interesterification, the blends had wider plastic range indicated by the SFC results and more beta' crystal. The improved physicochemical characteristics of interesterified blends were attributed to their changed TAG profiles. The statistical analysis showed that the interesterified blends were more likely to form beta' crystal with the increase of SU2-type TAG content and the decrease of SSS-type TAG content (p<0.01). In addition, the decrease of ECN 42- and ECN 48-type TAGs and the increase of ECN 50-type TAGs also significantly enhanced the formation of beta' crystal (p<0.05). Furthermore, the sn-1,3-specific Lipozyme TL IM-catalyzed interesterified blends were favorable for the formation of beta' crystal than the non-specific Novozym 435-catalyzed interesterified blends.
ESTHER : Zhu_2018_Food.Chem_260_306
PubMedSearch : Zhu_2018_Food.Chem_260_306
PubMedID: 29699674

Title : Orally Available Soluble Epoxide Hydrolase\/Phosphodiesterase 4 Dual Inhibitor Treats Inflammatory Pain - Blocher_2018_J.Med.Chem_61_3541
Author(s) : Blocher R , Wagner KM , Gopireddy RR , Harris TR , Wu H , Barnych B , Hwang SH , Xiang YK , Proschak E , Morisseau C , Hammock BD
Ref : Journal of Medicinal Chemistry , 61 :3541 , 2018
Abstract : Inspired by previously discovered enhanced analgesic efficacy between soluble epoxide hydrolase (sEH) and phosphodiesterase 4 (PDE4) inhibitors, we designed, synthesized and characterized 21 novel sEH/PDE4 dual inhibitors. The best of these displayed good efficacy in in vitro assays. Further pharmacokinetic studies of a subset of four selected compounds led to the identification of a bioavailable dual inhibitor N-(4-methoxy-2-(trifluoromethyl)benzyl)-1-propionylpiperidine-4-carboxamide (MPPA). In a lipopolysaccharide induced inflammatory pain rat model, MPPA rapidly increased in the blood ( Tmax = 30 min; Cmax = 460 nM) after oral administration of 3 mg/kg and reduced inflammatory pain with rapid onset of action correlating with blood levels over a time course of 4 h. Additionally, MPPA does not alter self-motivated exploration of rats with inflammatory pain or the withdrawal latency in control rats.
ESTHER : Blocher_2018_J.Med.Chem_61_3541
PubMedSearch : Blocher_2018_J.Med.Chem_61_3541
PubMedID: 29614224

Title : NDRG3 facilitates colorectal cancer metastasis through activating Src phosphorylation - Li_2018_Onco.Targets.Ther_11_2843
Author(s) : Li T , Sun R , Lu M , Chang J , Meng X , Wu H
Ref : Onco Targets Ther , 11 :2843 , 2018
Abstract : Background: NDRG3 is an N-myc downregulated gene (NDRG). The aim of this article was to identify the role of NDRG3 in colorectal cancer (CRC) and to determine the mechanism underlying its function. Methods: Using immunohistochemical staining, expression and clinicopathological variables of NDRG3 were analyzed in 170 CRC samples. Overexpression of NDRG3 was employed in SW1116 cells, downregulation of NDRG3 was achieved in RKO cells, then migration and invasion assays were performed in vitro, and a mouse model was constructed in vivo. Results: Increased expression of NDRG3 was observed in primary CRC tissues, and this expression was correlated with distant metastasis. Consistently, ectopic expression of NDRG3 in SW1116 cells enhanced cell migration and invasion, while knockdown of NDRG3 in RKO cells significantly suppressed CRC cell metastasis. The portal vein injection models suggested that NDRG3 overexpression facilitates liver metastasis. These events were associated with the phosphorylation of Src (c-Src) at Tyr 419 site. Conclusion: Our results showed that NDRG3 facilitates CRC migration and invasion by activating Src phosphorylation, suggesting the role of NDRG3 as a candidate oncogene.
ESTHER : Li_2018_Onco.Targets.Ther_11_2843
PubMedSearch : Li_2018_Onco.Targets.Ther_11_2843
PubMedID: 29844682

Title : Structure-activity relationship investigation of benzamide and picolinamide derivatives containing dimethylamine side chain as acetylcholinesterase inhibitors - Gao_2018_J.Enzyme.Inhib.Med.Chem_33_110
Author(s) : Gao XH , Liu LB , Liu HR , Tang JJ , Kang L , Wu H , Cui P , Yan J
Ref : J Enzyme Inhib Med Chem , 33 :110 , 2018
Abstract : A series of benzamide and picolinamide derivatives containing dimethylamine side chain (4a-4c and 7a-7i) were synthesised and evaluated for acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity in vitro. Structure-activity relationship investigation revealed that the substituted position of dimethylamine side chain markedly influenced the inhibitory activity and selectivity against AChE and BChE. In addition, it seemed that the bioactivity of picolinamide amide derivatives was stronger than that of benzamide derivatives. Among them, compound 7a revealed the most potent AChE inhibitory activity (IC50: 2.49 +/- 0.19 muM) and the highest selectivity against AChE over BChE (Ratio: 99.40). Enzyme kinetic study indicated that compound 7a show a mixed-type inhibition against AChE. The molecular docking study revealed that this compound can bind with both the catalytic site and the peripheral site of AChE.
ESTHER : Gao_2018_J.Enzyme.Inhib.Med.Chem_33_110
PubMedSearch : Gao_2018_J.Enzyme.Inhib.Med.Chem_33_110
PubMedID: 29166796

Title : Enhanced lincomycin production by co-overexpression of metK1 and metK2 in Streptomyces lincolnensis - Xu_2018_J.Ind.Microbiol.Biotechnol_45_345
Author(s) : Xu Y , Tan G , Ke M , Li J , Tang Y , Meng S , Niu J , Wang Y , Liu R , Wu H , Bai L , Zhang L , Zhang B
Ref : J Ind Microbiol Biotechnol , 45 :345 , 2018
Abstract : Streptomyces lincolnensis is generally utilized for the production of lincomycin A (Lin-A), a clinically useful antibiotic to treat Gram-positive bacterial infections. Three methylation steps, catalyzed by three different S-adenosylmethionine (SAM)-dependent methyltransferases, are required in the biosynthesis of Lin-A, and thus highlight the significance of methyl group supply in lincomycin production. In this study, we demonstrate that externally supplemented SAM cannot be taken in by cells and therefore does not enhance Lin-A production. Furthermore, bioinformatics and in vitro enzymatic assays revealed there exist two SAM synthetase homologs, MetK1 (SLCG_1651) and MetK2 (SLCG_3830) in S. lincolnensis that could convert L-methionine into SAM in the presence of ATP. Even though we attempted to inactivate metK1 and metK2, only metK2 was deleted in S. lincolnensis LCGL, named as DeltametK2. Following a reduction of the intracellular SAM concentration, DeltametK2 mutant exhibited a significant decrease of Lin-A in comparison to its parental strain. Individual overexpression of metK1 or metK2 in S. lincolnensis LCGL either elevated the amount of intracellular SAM, concomitant with 15% and 22% increase in Lin-A production, respectively. qRT-PCR assays showed that overexpression of either metK1 or metK2 increased the transcription of lincomycin biosynthetic genes lmbA and lmbR, and regulatory gene lmbU, indicating SAM may also function as a transcriptional activator. When metK1 and metK2 were co-expressed, Lin-A production was increased by 27% in LCGL, while by 17% in a high-yield strain LA219X.
ESTHER : Xu_2018_J.Ind.Microbiol.Biotechnol_45_345
PubMedSearch : Xu_2018_J.Ind.Microbiol.Biotechnol_45_345
PubMedID: 29574602
Gene_locus related to this paper: strln-a0a1b1ma73 , strln-a0a1b1m575

Title : Targeting dipeptidyl peptidase 8 genes inhibits proliferation, migration and invasion by inhibition of cyclin D1 and MMP2MMP9 signal pathway in cervical cancer - Chen_2018_J.Gene.Med_20_e3056
Author(s) : Chen Y , Liu F , Wu K , Wu W , Wu H , Zhang W
Ref : J Gene Med , 20 :e3056 , 2018
Abstract : BACKGROUND: DPP8 is a member of the dipeptidyl peptidase IV family, which belongs to the S9b protease subfamily. It regulates cell proliferation, apoptosis, migration and invasion during cancer progression. METHODS: To investigate the role of DPP8 in cervical cancer, we examined DPP8 levels in cervical cancer tissues and cells. The localization of DPP8 was determined by immunofluorescence staining. Subsequently, SiHa and HeLa cells were treated with small interfering RNA (siRNA)-DPP8. We used cell cycle analysis, an 5-ethyl-2'-deoxyuridine assay proliferation assay and a cellular apoptosis assay to determine the effect of DPP8 on the proliferation and apoptosis of cervical cancer cells. We used a Transwell assay to assess the number of transfection cancer cells migrating through the matrix. A real-time polymerase chain reaction and western blot analysis were used to analyze the expression of related proteins and to determine the phenotype caused by the depletion or overexpression of DPP8 in cervical cancer cells. RESULTS: We observed that DPP8 was highly expressed in cervical cancer tissues and cells. DPP8 expression was observed in the cytosol and in the perinuclear area, as well as in the nuclei of cervical cancer cells. Notably, when cells were treated with siRNA-DPP8, the expression of BAX increased, and the expression of cyclin D1, Bcl-2, MMP2 and MMP9 was downregulated. In cervical cancer cell lines, silencing the expression of DPP8 not only suppressed the proliferation, migration and invasion of the cervical cancer cells, but also promoted cervical cancer cell apoptosis. CONCLUSIONS: The data obtained in the present study reveal that DPP8 promotes the progression of cervical cancer.
ESTHER : Chen_2018_J.Gene.Med_20_e3056
PubMedSearch : Chen_2018_J.Gene.Med_20_e3056
PubMedID: 30225951

Title : Cellular Transport of Esculin and Its Acylated Derivatives in Caco-2 Cell Monolayers and Their Antioxidant Properties in Vitro - Zhang_2017_J.Agric.Food.Chem_65_7424
Author(s) : Zhang M , Xin X , Lai F , Zhang X , Li X , Wu H
Ref : Journal of Agricultural and Food Chemistry , 65 :7424 , 2017
Abstract : Esculin has many pharmacological effects, but these are difficult to observe after oral administration owing to poor lipid solubility. In our previous study, five acylated derivatives with different acyl chain lengths (EA, EP, EO, EL, and EM) were synthesized to improve the lipophilicity of esculin. In this study, the bioavailability and antioxidant activity of the five derivatives were investigated. The logP of esculin, EA, EP, EO, EL, and EM were -1.1 +/- 0.1, -0.3 +/- 0.14, 0.1 +/- 0.17, 1.6 +/- 0.09, 2.4 +/- 0.11, and 2.8 +/- 0.18, and their Papp were 0.71 +/- 0.02, 1.24 +/- 0.18, 1.74 +/- 0.11, 11.6 +/- 3.6, 4.11 +/- 1.03, and 2.64 +/- 0.97 x 10(-6) cm/s, respectively. Besides, the bioavailability of EO, EL, and EM were seriously affected by carboxylesterase. The results of ABTS, ORAC, and DPPH assays indicated that the antiradical ability of the five derivatives did not exceed that of esculin. However, EA, EP, and EO showed more effective inhibition of AAPH-induced oxidative hemolysis than esculin did (p < 0.05), and EL and EM were less effective than esculin (p < 0.05). The mechanism was related to the distribution and localization of the derivatives in "oil-water interface" between the cytomembrane and the aqueous phase.
ESTHER : Zhang_2017_J.Agric.Food.Chem_65_7424
PubMedSearch : Zhang_2017_J.Agric.Food.Chem_65_7424
PubMedID: 28805379

Title : Modulation of excitation on parvalbumin interneurons by neuroligin-3 regulates the hippocampal network - Polepalli_2017_Nat.Neurosci_20_219
Author(s) : Polepalli JS , Wu H , Goswami D , Halpern CH , Sudhof TC , Malenka RC
Ref : Nat Neurosci , 20 :219 , 2017
Abstract : Hippocampal network activity is generated by a complex interplay between excitatory pyramidal cells and inhibitory interneurons. Although much is known about the molecular properties of excitatory synapses on pyramidal cells, comparatively little is known about excitatory synapses on interneurons. Here we show that conditional deletion of the postsynaptic cell adhesion molecule neuroligin-3 in parvalbumin interneurons causes a decrease in NMDA-receptor-mediated postsynaptic currents and an increase in presynaptic glutamate release probability by selectively impairing the inhibition of glutamate release by presynaptic Group III metabotropic glutamate receptors. As a result, the neuroligin-3 deletion altered network activity by reducing gamma oscillations and sharp wave ripples, changes associated with a decrease in extinction of contextual fear memories. These results demonstrate that neuroligin-3 specifies the properties of excitatory synapses on parvalbumin-containing interneurons by a retrograde trans-synaptic mechanism and suggest a molecular pathway whereby neuroligin-3 mutations contribute to neuropsychiatric disorders.
ESTHER : Polepalli_2017_Nat.Neurosci_20_219
PubMedSearch : Polepalli_2017_Nat.Neurosci_20_219
PubMedID: 28067903

Title : No Association Between CEL-HYB Hybrid Allele and Chronic Pancreatitis in Asian Populations - Zou_2016_Gastroenterology_150_1558
Author(s) : Zou WB , Boulling A , Masamune A , Issarapu P , Masson E , Wu H , Sun XT , Hu LH , Zhou DZ , He L , Fichou Y , Nakano E , Hamada S , Kakuta Y , Kume K , Isayama H , Paliwal S , Mani KR , Bhaskar S , Cooper DN , Ferec C , Shimosegawa T , Chandak GR , Chen JM , Li ZS , Liao Z
Ref : Gastroenterology , 150 :1558 , 2016
Abstract : A hybrid allele between the carboxyl ester lipase gene (CEL) and its pseudogene, CELP (called CEL-HYB), generated by nonallelic homologous recombination between CEL intron 10 and CELP intron 10', was found to increase susceptibility to chronic pancreatitis in a case-control study of patients of European ancestry. We attempted to replicate this finding in 3 independent cohorts from China, Japan, and India, but failed to detect the CEL-HYB allele in any of these populations. The CEL-HYB allele might therefore be an ethnic-specific risk factor for chronic pancreatitis. An alternative hybrid allele (CEL-HYB2) was identified in all 3 Asian populations (1.7% combined carrier frequency), but was not associated with chronic pancreatitis.
ESTHER : Zou_2016_Gastroenterology_150_1558
PubMedSearch : Zou_2016_Gastroenterology_150_1558
PubMedID: 26946345

Title : Susceptibility and potential biochemical mechanism of Oedaleus asiaticus to beta-cypermethrin and deltamethrin in the Inner Mongolia, China - Dong_2016_Pestic.Biochem.Physiol_132_47
Author(s) : Dong W , Zhang X , Wu H , Zhang M , Ma E , Zhang J
Ref : Pestic Biochem Physiol , 132 :47 , 2016
Abstract : Oedaleus asiaticus is a highly destructive grass pest in Inner Mongolia, China, and likely developed resistance to pyrethroid insecticides due to their frequent application for control of this locust. In this study, the susceptibility of five field populations of O. asiaticus to two pyrethroid insecticides was investigated. The Wulate Middle Banner (WB) population was the least susceptible, whereas the Ewenki Banner (EB) population appeared to be the most sensitive. The WB population was 3.16 and 5.15-fold less sensitive to beta-cypermethrin and deltamethrin than EB population, respectively. Further, the enzyme activities and mRNA expression levels of carboxylesterase (CarE) and glutathione-S-transferase (GST) were determined and we found that their activities in the WB population were 5.15 and 2.8-fold higher than those in the EB population, respectively. Quantitative real-time PCR (qRT-PCR) analysis demonstrated that the mRNA expression levels of CarE and GST genes were positively correlated with the LD50 in the WB, Siziwang Banner (SB) and EB populations. Our findings suggest that differences in susceptibility to pyrethroids in O. asiaticus might be attributed to the elevated activities and mRNA expression levels of CarE and GST genes.
ESTHER : Dong_2016_Pestic.Biochem.Physiol_132_47
PubMedSearch : Dong_2016_Pestic.Biochem.Physiol_132_47
PubMedID: 27521912

Title : Functions of Type II Thioesterases in Bacterial Polyketide Biosynthesis - Luo_2016_Protein.Pept.Lett_23_1032
Author(s) : Luo HD , Jin MY , Wu H , Jiang H
Ref : Protein Pept Lett , 23 :1032 , 2016
Abstract : Many polyketides show biological activities and have thus been applied in clinics, as food additives, and in agriculture. Type II thioesterases (TEIIs) play an important role in polyketide biosynthesis. Most TEIIs belong to alpha/beta-hydrolase family and usually contain a catalytic triad Ser-His-Asp. In polyketide biosynthesis, TEIIs can play an editing role by removal of aberrant non-extendable acyl units in elongation steps, a starter unit selection role by removal of unfavored starter acyl units in initiation steps, and a releasing role by removal of final product in termination steps. Complementation of TEIIs has been observed and applied.
ESTHER : Luo_2016_Protein.Pept.Lett_23_1032
PubMedSearch : Luo_2016_Protein.Pept.Lett_23_1032
PubMedID: 27653630

Title : Enriched environment improves post-stroke cognitive impairment in mice by potential regulation of acetylation homeostasis in cholinergic circuits - Wang_2016_Brain.Res_1650_232
Author(s) : Wang X , Chen A , Wu H , Ye M , Cheng H , Jiang X , Zhang X , Wu D , Gu X , Shen F , Shan C , Yu D
Ref : Brain Research , 1650 :232 , 2016
Abstract : Post-stroke cognitive impairment (PSCI), commonly seen in the clinical practice, is a major factor impeding patient rehabilitation. Enriched environment (EE) intervention is a simple and effective way to improve cognitive impairment, partially due to the rebalancing of the basal forebrain-hippocampus cholinergic signaling pathway. Epigenetic changes have been identified in many cognitive disorders. However, studies on the effects of EE on epigenetic regulation of cholinergic circuits in PSCI animal models have not yet been reported. In this study, we established a photothrombotic mouse PSCI model and showed that after EE intervention, mice with PSCI had significantly improved water maze performance, better induction of hippocampal long-term potentiation (LTP), enhanced function of the basal forebrain-hippocampus cholinergic circuits of contralateral side of stroke and relatively balanced acetylation homeostasis compared to those of PSCI mice in standard environments (SE). In addition, PSCI mice in EE expressed much higher levels of p-CREB and CBP than in SE, and the chromatins bound to M-type promoter of ChAT gene were more acetylated. These results demonstrate that EE plays an important role in the improvement of PSCI and the underlying mechanism may involve in the acetylation of histones bound to the ChAT gene promoter in cholinergic circuits.
ESTHER : Wang_2016_Brain.Res_1650_232
PubMedSearch : Wang_2016_Brain.Res_1650_232
PubMedID: 27637156

Title : Solid phase synthesis of 1,3,4-oxadiazin-5 (6R)-one and 1,3,4-oxadiazol-2-one scaffolds from acyl hydrazides - Sarma_2015_Org.Biomol.Chem_13_59
Author(s) : Sarma BK , Liu X , Wu H , Gao Y , Kodadek T
Ref : Org Biomol Chem , 13 :59 , 2015
Abstract : Solid phase synthesis of 1,3,4-oxadiazin-5(6R)-one and 1,3,4-oxadiazol-2-one scaffolds from resin-bound acyl hydrazides is described. We demonstrate here that the reactions of resin-bound aryl or hetero-aromatic acyl hydrazides with 2-substituted-2-bromoacetic acids and 4-nitrophenyl chloroformate and subsequent treatment with DIEA lead to intramolecular cyclization reactions to produce six-membered 1,3,4-oxadiazin-5(6R)-ones and five-membered 1,3,4-oxadiazol-2-ones, respectively. We also show that acyl hydrazide-derived 1,3,4-oxadiazol-2-ones may be useful serine hydrolase inhibitors.
ESTHER : Sarma_2015_Org.Biomol.Chem_13_59
PubMedSearch : Sarma_2015_Org.Biomol.Chem_13_59
PubMedID: 25354697

Title : Effects of harmine, an acetylcholinesterase inhibitor, on spatial learning and memory of APP\/PS1 transgenic mice and scopolamine-induced memory impairment mice - He_2015_Eur.J.Pharmacol_768_96
Author(s) : He D , Wu H , Wei Y , Liu W , Huang F , Shi H , Zhang B , Wu X , Wang C
Ref : European Journal of Pharmacology , 768 :96 , 2015
Abstract : Harmine, a beta-carboline alkaloid present in Peganum harmala with a wide spectrum of pharmacological activities, has been shown to exert strong inhibition against acetylcholinesterase in vitro. However, whether it can rescue the impaired cognition has not been elucidated yet. In current study, we examined its effects on scopolamine-induced memory impairment mice and APP/PS1 transgenic mice, one of the models for Alzheimer's disease, using Morris Water Maze test. In addition, whether harmine could penetrate blood brain barrier, interact with and inhibit acetylcholinesterase, and activate downstream signaling network was also investigated. Our results showed that harmine (20mg/kg) administered by oral gavage for 2 weeks could effectively enhance the spatial cognition of C57BL/6 mice impaired by intraperitoneal injection of scopolamine (1mg/kg). Meanwhile, long-term consumption of harmine (20mg/kg) for 10 weeks also slightly benefited the impaired memory of APP/PS1 mice. Furthermore, harmine could pass through blood brain barrier, penetrate into the brain parenchyma shortly after oral administration, and modulate the expression of Egr-1, c-Jun and c-Fos. Molecular docking assay disclosed that harmine molecule could directly dock into the catalytic active site of acetylcholinesterase, which was partially confirmed by its in vivo inhibitory activity on acetylcholinesterase. Taken together, all these results suggested that harmine could ameliorate impaired memory by enhancement of cholinergic neurotransmission via inhibiting the activity of acetylcholinesterase, which may contribute to its clinical use in the therapy of neurological diseases characterized with acetylcholinesterase deficiency.
ESTHER : He_2015_Eur.J.Pharmacol_768_96
PubMedSearch : He_2015_Eur.J.Pharmacol_768_96
PubMedID: 26526348

Title : Whole-genome sequencing of cultivated and wild peppers provides insights into Capsicum domestication and specialization - Qin_2014_Proc.Natl.Acad.Sci.U.S.A_111_5135
Author(s) : Qin C , Yu C , Shen Y , Fang X , Chen L , Min J , Cheng J , Zhao S , Xu M , Luo Y , Yang Y , Wu Z , Mao L , Wu H , Ling-Hu C , Zhou H , Lin H , Gonzalez-Morales S , Trejo-Saavedra DL , Tian H , Tang X , Zhao M , Huang Z , Zhou A , Yao X , Cui J , Li W , Chen Z , Feng Y , Niu Y , Bi S , Yang X , Cai H , Luo X , Montes-Hernandez S , Leyva-Gonzalez MA , Xiong Z , He X , Bai L , Tan S , Liu D , Liu J , Zhang S , Chen M , Zhang L , Zhang Y , Liao W , Wang M , Lv X , Wen B , Liu H , Luan H , Yang S , Wang X , Xu J , Li X , Li S , Wang J , Palloix A , Bosland PW , Li Y , Krogh A , Rivera-Bustamante RF , Herrera-Estrella L , Yin Y , Yu J , Hu K , Zhang Z
Ref : Proc Natl Acad Sci U S A , 111 :5135 , 2014
Abstract : As an economic crop, pepper satisfies people's spicy taste and has medicinal uses worldwide. To gain a better understanding of Capsicum evolution, domestication, and specialization, we present here the genome sequence of the cultivated pepper Zunla-1 (C. annuum L.) and its wild progenitor Chiltepin (C. annuum var. glabriusculum). We estimate that the pepper genome expanded approximately 0.3 Mya (with respect to the genome of other Solanaceae) by a rapid amplification of retrotransposons elements, resulting in a genome comprised of approximately 81% repetitive sequences. Approximately 79% of 3.48-Gb scaffolds containing 34,476 protein-coding genes were anchored to chromosomes by a high-density genetic map. Comparison of cultivated and wild pepper genomes with 20 resequencing accessions revealed molecular footprints of artificial selection, providing us with a list of candidate domestication genes. We also found that dosage compensation effect of tandem duplication genes probably contributed to the pungent diversification in pepper. The Capsicum reference genome provides crucial information for the study of not only the evolution of the pepper genome but also, the Solanaceae family, and it will facilitate the establishment of more effective pepper breeding programs.
ESTHER : Qin_2014_Proc.Natl.Acad.Sci.U.S.A_111_5135
PubMedSearch : Qin_2014_Proc.Natl.Acad.Sci.U.S.A_111_5135
PubMedID: 24591624
Gene_locus related to this paper: capch-q75qh4 , capan-a0a1u8fuf5 , capan-a0a1u8gmz3 , capan-a0a1u8f879 , capan-a0a1u8ftr2 , capan-a0a1u8g8s6

Title : Effect of allyl isothiocyanate on ultra-structure and the activities of four enzymes in adult Sitophilus zeamais - Wu_2014_Pestic.Biochem.Physiol_109_12
Author(s) : Wu H , Liu XR , Yu DD , Zhang X , Feng JT
Ref : Pesticide Biochemistry and Physiology , 109 :12 , 2014
Abstract : Rarefaction and vacuolization of the mitochondrial matrix of AITC-treated (allyl isothiocyanate-treated) adult Sitophilus zeamais were evident according to the ultra-structural by TEM. Four important enzymes in adult S. zeamais were further studied after fumigation treatment with allyl isothiocyanate (AITC) extracted from Armoracia rusticana roots and shoots. The enzymes were glutathione S-transferase (GST), catalase (CAT), cytochrome c oxidase, and acetylcholinesterase (AChE). The results indicated that the activities of the four enzymes were strongly time and dose depended. With prolonged exposure time, treatment with 0.74mug/mL AITC inhibited the activities of cytochrome c oxidase, AChE, and CAT, but induced the activity of GST. The activities of cytochrome c oxidase, AChE, and CAT were remarkably induced at a low AITC dosage (0.25mug/mL), but were restrained with increased AITC dosage. The activity of GST was inhibited at a low AITC dosage (0.5mug/mL), but was induced at a high AITC dosage (1.5mug/mL). According to the results of TEM, toxic symptoms and enzymes activities, it suggested that mitochondrial maybe the one site of action of AITC against the adult S. zeamais and it also suggested that cytochrome c oxidase maybe one target protein of AITC against the adult S. zeamais, which need to further confirmed by protein function tested.
ESTHER : Wu_2014_Pestic.Biochem.Physiol_109_12
PubMedSearch : Wu_2014_Pestic.Biochem.Physiol_109_12
PubMedID: 24581380

Title : Synthesis and evaluation of paeonol derivatives as potential multifunctional agents for the treatment of Alzheimer's disease - Zhou_2014_Molecules_20_1304
Author(s) : Zhou A , Wu H , Pan J , Wang X , Li J , Wu Z , Hui A
Ref : Molecules , 20 :1304 , 2014
Abstract : Alzheimer's disease (AD) is a progressive neurodegenerative brain disorder characterized by memory loss, language impairment, personality changes and intellectual decline. Taking into account the key pathological features of AD, such as low levels of acetylcholine, beta-amyloid (Abeta) aggregation, oxidative stress and dyshomeostasis of biometals, a new series of paeonol derivatives 5a-5d merging three different functions, i.e., antioxidant, anti-acetylcholinesterase (AChE) activity, metal chelating agents for AD treatment have been synthesized and characterized. Biological assays revealed that compared with paeonol (309.7 muM), 5a-5d had a lower DPPH IC50 value (142.8-191.6 muM). 5a-5d could significantly inhibit hydrogen peroxide-induced neuronal PC12 cell death assessed by MTT assay in the concentration range of 5-40 muM. AChE activity was effectively inhibited by 5a-5d, with IC50 values in the range of 0.61-7.04 muM. 5a-5d also exhibited good metal-chelating ability. All the above results suggested that paeonol derivatives may be promising multifunctional agents for AD treatment.
ESTHER : Zhou_2014_Molecules_20_1304
PubMedSearch : Zhou_2014_Molecules_20_1304
PubMedID: 25594344

Title : Whole-genome sequencing of Oryza brachyantha reveals mechanisms underlying Oryza genome evolution - Chen_2013_Nat.Commun_4_1595
Author(s) : Chen J , Huang Q , Gao D , Wang J , Lang Y , Liu T , Li B , Bai Z , Luis Goicoechea J , Liang C , Chen C , Zhang W , Sun S , Liao Y , Zhang X , Yang L , Song C , Wang M , Shi J , Liu G , Liu J , Zhou H , Zhou W , Yu Q , An N , Chen Y , Cai Q , Wang B , Liu B , Min J , Huang Y , Wu H , Li Z , Zhang Y , Yin Y , Song W , Jiang J , Jackson SA , Wing RA , Chen M
Ref : Nat Commun , 4 :1595 , 2013
Abstract : The wild species of the genus Oryza contain a largely untapped reservoir of agronomically important genes for rice improvement. Here we report the 261-Mb de novo assembled genome sequence of Oryza brachyantha. Low activity of long-terminal repeat retrotransposons and massive internal deletions of ancient long-terminal repeat elements lead to the compact genome of Oryza brachyantha. We model 32,038 protein-coding genes in the Oryza brachyantha genome, of which only 70% are located in collinear positions in comparison with the rice genome. Analysing breakpoints of non-collinear genes suggests that double-strand break repair through non-homologous end joining has an important role in gene movement and erosion of collinearity in the Oryza genomes. Transition of euchromatin to heterochromatin in the rice genome is accompanied by segmental and tandem duplications, further expanded by transposable element insertions. The high-quality reference genome sequence of Oryza brachyantha provides an important resource for functional and evolutionary studies in the genus Oryza.
ESTHER : Chen_2013_Nat.Commun_4_1595
PubMedSearch : Chen_2013_Nat.Commun_4_1595
PubMedID: 23481403
Gene_locus related to this paper: orysa-Q6ZDG3 , orysa-q6h415 , orysj-q6yse8 , orysa-q33aq0 , orybr-j3l7k2 , orybr-j3m138 , orybr-j3l6m8 , orybr-j3m3b3 , orybr-j3l8d1 , orybr-j3kza5 , orybr-j3mnb5 , orybr-j3n4p4 , orybr-j3lg73 , orybr-j3l342 , orybr-j3msi2 , orybr-j3nb83 , orybr-j3mpc5

Title : Genome sequence of the date palm Phoenix dactylifera L - Al-Mssallem_2013_Nat.Commun_4_2274
Author(s) : Al-Mssallem IS , Hu S , Zhang X , Lin Q , Liu W , Tan J , Yu X , Liu J , Pan L , Zhang T , Yin Y , Xin C , Wu H , Zhang G , Ba Abdullah MM , Huang D , Fang Y , Alnakhli YO , Jia S , Yin A , Alhuzimi EM , Alsaihati BA , Al-Owayyed SA , Zhao D , Zhang S , Al-Otaibi NA , Sun G , Majrashi MA , Li F , Tala , Wang J , Yun Q , Alnassar NA , Wang L , Yang M , Al-Jelaify RF , Liu K , Gao S , Chen K , Alkhaldi SR , Liu G , Zhang M , Guo H , Yu J
Ref : Nat Commun , 4 :2274 , 2013
Abstract : Date palm (Phoenix dactylifera L.) is a cultivated woody plant species with agricultural and economic importance. Here we report a genome assembly for an elite variety (Khalas), which is 605.4 Mb in size and covers >90% of the genome (~671 Mb) and >96% of its genes (~41,660 genes). Genomic sequence analysis demonstrates that P. dactylifera experienced a clear genome-wide duplication after either ancient whole genome duplications or massive segmental duplications. Genetic diversity analysis indicates that its stress resistance and sugar metabolism-related genes tend to be enriched in the chromosomal regions where the density of single-nucleotide polymorphisms is relatively low. Using transcriptomic data, we also illustrate the date palm's unique sugar metabolism that underlies fruit development and ripening. Our large-scale genomic and transcriptomic data pave the way for further genomic studies not only on P. dactylifera but also other Arecaceae plants.
ESTHER : Al-Mssallem_2013_Nat.Commun_4_2274
PubMedSearch : Al-Mssallem_2013_Nat.Commun_4_2274
PubMedID: 23917264
Gene_locus related to this paper: phodc-a0a2h3y3d5 , phodc-a0a2h3z529 , phodc-a0a2h3y147 , phodc-a0a2h3xrz4 , phodc-a0a3q0ic37 , phodc-a0a2h3yxf0 , phodc-a0a2h3zh01 , phodc-a0a3q0hs32

Title : Draft genome of the wheat A-genome progenitor Triticum urartu - Ling_2013_Nature_496_87
Author(s) : Ling HQ , Zhao S , Liu D , Wang J , Sun H , Zhang C , Fan H , Li D , Dong L , Tao Y , Gao C , Wu H , Li Y , Cui Y , Guo X , Zheng S , Wang B , Yu K , Liang Q , Yang W , Lou X , Chen J , Feng M , Jian J , Zhang X , Luo G , Jiang Y , Liu J , Wang Z , Sha Y , Zhang B , Tang D , Shen Q , Xue P , Zou S , Wang X , Liu X , Wang F , Yang Y , An X , Dong Z , Zhang K , Luo MC , Dvorak J , Tong Y , Yang H , Li Z , Wang D , Zhang A
Ref : Nature , 496 :87 , 2013
Abstract : Bread wheat (Triticum aestivum, AABBDD) is one of the most widely cultivated and consumed food crops in the world. However, the complex polyploid nature of its genome makes genetic and functional analyses extremely challenging. The A genome, as a basic genome of bread wheat and other polyploid wheats, for example, T. turgidum (AABB), T. timopheevii (AAGG) and T. zhukovskyi (AAGGA(m)A(m)), is central to wheat evolution, domestication and genetic improvement. The progenitor species of the A genome is the diploid wild einkorn wheat T. urartu, which resembles cultivated wheat more extensively than do Aegilops speltoides (the ancestor of the B genome) and Ae. tauschii (the donor of the D genome), especially in the morphology and development of spike and seed. Here we present the generation, assembly and analysis of a whole-genome shotgun draft sequence of the T. urartu genome. We identified protein-coding gene models, performed genome structure analyses and assessed its utility for analysing agronomically important genes and for developing molecular markers. Our T. urartu genome assembly provides a diploid reference for analysis of polyploid wheat genomes and is a valuable resource for the genetic improvement of wheat.
ESTHER : Ling_2013_Nature_496_87
PubMedSearch : Ling_2013_Nature_496_87
PubMedID: 23535596
Gene_locus related to this paper: triua-m8a764 , triua-m8ag96 , triua-m7zp69 , wheat-w5d1z6 , wheat-w5d232 , wheat-w5bnf5 , triua-t1nm05 , wheat-w5cae4 , triua-m7ytf7 , wheat-w5f1j8 , triua-m8ad49 , wheat-a0a077s1q2 , wheat-a0a3b6c2m6 , triua-m7zi26 , wheat-a0a3b6at77 , wheat-a0a3b6atp7

Title : Alterations in activity and mRNA expression of acetylcholinesterase in the liver, kidney and gill of common carp exposed to atrazine and chlorpyrifos - Xing_2013_Environ.Toxicol.Pharmacol_35_47
Author(s) : Xing H , Wu H , Sun G , Zhang Z , Xu S , Li S
Ref : Environ Toxicol Pharmacol , 35 :47 , 2013
Abstract : Insecticides and herbicides are widely used in modern agricultural production. The intensive use of insecticide chlorpyrifos (CPF) and herbicide atrazine (ATR) has resulted in serious environmental problems. Herein, we investigated alteration in activity and mRNA levels of AChE in the liver, kidney and gill from common carp after 40d exposure to CPF and ATR alone or in combination and 20d recovery treatment. Results indicated that activity and mRNA levels of AChE at all high-dose groups have been significantly decreased after CPF and ATR alone or ATR/CPF mixture exposure, and the changes were improved in the end of recovery tests in varying degrees, the activity and gene expression of AChE in the joint toxicity of ATR and CPF groups were significantly lower than that in the single toxicant group. Our study suggests that the decrease of AChE activity observed at all high-dose groups (CPF and ATR alone or in combination) may be directly related to a lower AChE expression, and the joint toxicity of ATR and CPF is higher than ATR and CPF alone.
ESTHER : Xing_2013_Environ.Toxicol.Pharmacol_35_47
PubMedSearch : Xing_2013_Environ.Toxicol.Pharmacol_35_47
PubMedID: 23237783

Title : Gap2 promotes the formation of a stable protein complex required for mature Fap1 biogenesis - Echlin_2013_J.Bacteriol_195_2166
Author(s) : Echlin H , Zhu F , Li Y , Peng Z , Ruiz T , Bedwell GJ , Prevelige PE, Jr. , Wu H
Ref : Journal of Bacteriology , 195 :2166 , 2013
Abstract : Serine-rich repeat glycoproteins (SRRPs) are important bacterial adhesins conserved in streptococci and staphylococci. Fap1, a SRRP identified in Streptococcus parasanguinis, is the major constituent of bacterial fimbriae and is required for adhesion and biofilm formation. An 11-gene cluster is required for Fap1 glycosylation and secretion; however, the exact mechanism of Fap1 biogenesis remains a mystery. Two glycosylation-associated proteins within this cluster--Gap1 and Gap3--function together in Fap1 biogenesis. Here we report the role of the third glycosylation-associated protein, Gap2. A gap2 mutant exhibited the same phenotype as the gap1 and gap3 mutants in terms of Fap1 biogenesis, fimbrial assembly, and bacterial adhesion, suggesting that the three proteins interact. Indeed, all three proteins interacted with each other independently and together to form a stable protein complex. Mechanistically, Gap2 protected Gap3 from degradation by ClpP protease, and Gap2 required the presence of Gap1 for expression at the wild-type level. Gap2 augmented the function of Gap1 in stabilizing Gap3; this function was conserved in Gap homologs from Streptococcus agalactiae. Our studies demonstrate that the three Gap proteins work in concert in Fap1 biogenesis and reveal a new function of Gap2. This insight will help us elucidate the molecular mechanism of SRRP biogenesis in this bacterium and in pathogenic species.
ESTHER : Echlin_2013_J.Bacteriol_195_2166
PubMedSearch : Echlin_2013_J.Bacteriol_195_2166
PubMedID: 23475979
Gene_locus related to this paper: 9stre-e7s950

Title : [Impacts that dimethoate inhibited the benchmark dose of acetylcholinesterase based on experimental designs] - He_2013_Wei.Sheng.Yan.Jiu_42_999
Author(s) : He X , Li T , Yi N , Wu H , Zhao M , Yao X , Wang C
Ref : Wei Sheng Yan Jiu , 42 :999 , 2013
Abstract : OBJECTIVE: To obtain the impacts of experimental design on benchmark dose (BMD), and the result was applied to test the computer simulation by software Slob (optimal method to calculate the BMD: for a certain sample capacity, to add the experimental groups by reducing the amount of animals in each group) , consequently, this method can be widely used in the future.
METHODS: Eighty adult female SD rats were ig given dimethoate 0.5, 1, 2, 4, 8, 16 and 32 mg/kg for 21 d, respectively. Rats were sacrificed, and acetylcholinesterase (AChE) activity in the hippocampus, cerebral cortex and serum of rats was determined after dimethoate was ig given to rats for 21 d. And then, the software package PROAST28.1 was applied to calculate the BMD. The four does groups of 10 animals (4 x 10 design) and 8 x 5 design were selected from 8 x 10 design to study the impacts of experimental design on BMD.
RESULTS: Comparing with the normal control, the significant decline of AChE in hippocampus was observed in 2, 4, 8, 16 and 32 mg/kg groups (P < 0.05), whereas the significant decrease was obtained in 0.5, 1, 2, 4, 8, 16 and 32 mg/kg groups (P < 0.05). Taking the 8 x 10 design as the standard, the confidence interval of BMD calculated by both of 4 x 10 design and 8 x 5 design covered the BMD by 8 x 10 design. And also, confidence interval of BMD, calculated by design scheme 1, 2, 3, 4 and 6 of 4 x 10 design, wider than that of 8 x 5 design, but its scheme 5 narrower than 8 x 5 design. CONCLUSION: To add experimental groups in a certain sample capacity was the optimal method to calculate BMD, but was not the common toxicity experimental design (e. g. set four groups including control, low-dose, moderate-dose, high-dose group).
ESTHER : He_2013_Wei.Sheng.Yan.Jiu_42_999
PubMedSearch : He_2013_Wei.Sheng.Yan.Jiu_42_999
PubMedID: 24459918

Title : Distinct roles of muscle and motoneuron LRP4 in neuromuscular junction formation - Wu_2012_Neuron_75_94
Author(s) : Wu H , Lu Y , Shen C , Patel N , Gan L , Xiong WC , Mei L
Ref : Neuron , 75 :94 , 2012
Abstract : Neuromuscular junction (NMJ) formation requires precise interaction between motoneurons and muscle fibers. LRP4 is a receptor of agrin that is thought to act in cis to stimulate MuSK in muscle fibers for postsynaptic differentiation. Here we dissected the roles of LRP4 in muscle fibers and motoneurons in NMJ formation by cell-specific mutation. Studies of muscle-specific mutants suggest that LRP4 is involved in deciding where to form AChR clusters in muscle fibers, postsynaptic differentiation, and axon terminal development. LRP4 in HEK293 cells increased synapsin or SV2 puncta in contacting axons of cocultured neurons, suggesting a synaptogenic function. Analysis of LRP4 muscle and motoneuron double mutants and mechanistic studies suggest that NMJ formation may also be regulated by LRP4 in motoneurons, which could serve as agrin's receptor in trans to induce AChR clusters. These observations uncovered distinct roles of LRP4 in motoneurons and muscles in NMJ development.
ESTHER : Wu_2012_Neuron_75_94
PubMedSearch : Wu_2012_Neuron_75_94
PubMedID: 22794264

Title : A novel small Odorranalectin-bearing cubosomes: preparation, brain delivery and pharmacodynamic study on amyloid-beta(2)(5)(-)(3)(5)-treated rats following intranasal administration - Wu_2012_Eur.J.Pharm.Biopharm_80_368
Author(s) : Wu H , Li J , Zhang Q , Yan X , Guo L , Gao X , Qiu M , Jiang X , Lai R , Chen H
Ref : Eur J Pharm Biopharm , 80 :368 , 2012
Abstract : Because of the immunogenicity and toxicity in vivo of large molecules such as lectins, the application of these molecules is remarkably restricted in drug delivery systems. In this study, to improve the brain drug delivery and reduce the immunogenicity of traditional lectin modified delivery system, Odorranalectin (OL, 1700 Da), a novel non-immunogenic small peptide, was selected to establish an OL-modified cubosomes (Cubs) system. The streptavidin (SA)-conjugated Cubs were prepared by incorporating maleimide-PEG-oleate and taking advantage of its thiol group binding reactivity to conjugate with 2-iminothiolane thiolated SA; mono-biotinylated OL was then coupled with the SA-modified Cubs. The OL-decorated Cubs (OL-Cubs) devised via a non-covalent SA-biotin "bridge" made it easy to conjugate OL and determine the number of ligands on the surface of the Cubs using sensitive chemiluminescent detection. Retention of the bio-recognitive activity of OL after covalent coupling was verified by hemagglutination testing. Nose-to-brain delivery characteristic of OL-Cubs was investigated by in vivo fluorescent biodistribution using coumarin-6 as a marker. The relative uptake of coumarin carried by OL-Cubs was 1.66- to 3.46-fold in brain tissues compared to that incorporated in the Cubs. Besides, Gly14-Humanin (S14G-HN) as a model peptide drug was loaded into cubosomes and evaluated for its pharmacodynamics on Alzheimer's disease (AD) rats following intranasal administration by Morris water maze test and acetylcholinesterase activity determination. The results suggested that OL functionalization enhanced the therapeutic effects of S14G-HN-loaded cubosomes on AD. Thus, OL-Cubs might offer a novel effective and noninvasive system for brain drug delivery, especially for peptides and proteins.
ESTHER : Wu_2012_Eur.J.Pharm.Biopharm_80_368
PubMedSearch : Wu_2012_Eur.J.Pharm.Biopharm_80_368
PubMedID: 22061263

Title : Overexpression and characterization of a new organic solvent-tolerant esterase derived from soil metagenomic DNA - Jin_2012_Bioresour.Technol_116_234
Author(s) : Jin P , Pei X , Du P , Yin X , Xiong X , Wu H , Zhou X , Wang Q
Ref : Bioresour Technol , 116 :234 , 2012
Abstract : In this study, an esterase, designated EstC23, was isolated from a soil metagenomic library. The protein was amenable to overexpression in Escherichia coli under control of the T7 promoter, resulting in expression of the active, soluble protein that constituted 30% of the total cell protein content. This enzyme showed optimal activity at 40 degrees C and retained about 50% maximal activity at 5-10 degrees C. EstC23 showed remarkable stability in up to 50% (v/v) benzene and alkanes (high logP solvents). When incubated for 7 days in the presence of 50% benzene or alkanes, the enzyme maintained its 2-3 fold elevated activity. The purified enzyme also cleaved sterically hindered esters of tertiary alcohols. These results indicate that EstC23 has potential for use in industrial processes.
ESTHER : Jin_2012_Bioresour.Technol_116_234
PubMedSearch : Jin_2012_Bioresour.Technol_116_234
PubMedID: 22100232
Gene_locus related to this paper: 9bact-q6rjm3

Title : Genomic and transcriptomic insights into the thermo-regulated biosynthesis of validamycin in Streptomyces hygroscopicus 5008 - Wu_2012_BMC.Genomics_13_337
Author(s) : Wu H , Qu S , Lu C , Zheng H , Zhou X , Bai L , Deng Z
Ref : BMC Genomics , 13 :337 , 2012
Abstract : BACKGROUND: Streptomyces hygroscopicus 5008 has been used for the production of the antifungal validamycin/jinggangmycin for more than 40 years. A high yield of validamycin is achieved by culturing the strain at 37 degreesC, rather than at 30 degreesC for normal growth and sporulation. The mechanism(s) of its thermo-regulated biosynthesis was largely unknown. RESULTS: The 10,383,684-bp genome of strain 5008 was completely sequenced and composed of a linear chromosome, a 164.57-kb linear plasmid, and a 73.28-kb circular plasmid. Compared with other Streptomyces genomes, the chromosome of strain 5008 has a smaller core region and shorter terminal inverted repeats, encodes more alpha/beta hydrolases, major facilitator superfamily transporters, and Mg2+/Mn2+-dependent regulatory phosphatases. Transcriptomic analysis revealed that the expression of 7.5% of coding sequences was increased at 37 degreesC, including biosynthetic genes for validamycin and other three secondary metabolites. At 37 degreesC, a glutamate dehydrogenase was transcriptionally up-regulated, and further proved its involvement in validamycin production by gene replacement. Moreover, efficient synthesis and utilization of intracellular glutamate were noticed in strain 5008 at 37 degreesC, revealing glutamate as the nitrogen source for validamycin biosynthesis. Furthermore, a SARP-family regulatory gene with enhanced transcription at 37 degreesC was identified and confirmed to be positively involved in the thermo-regulation of validamycin production by gene inactivation and transcriptional analysis. CONCLUSIONS: Strain 5008 seemed to have evolved with specific genomic components to facilitate the thermo-regulated validamycin biosynthesis. The data obtained here will facilitate future studies for validamycin yield improvement and industrial bioprocess optimization.
ESTHER : Wu_2012_BMC.Genomics_13_337
PubMedSearch : Wu_2012_BMC.Genomics_13_337
PubMedID: 22827618
Gene_locus related to this paper: strhj-h2k4a5

Title : Edwardsiella comparative phylogenomics reveal the new intra\/inter-species taxonomic relationships, virulence evolution and niche adaptation mechanisms - Yang_2012_PLoS.One_7_e36987
Author(s) : Yang M , Lv Y , Xiao J , Wu H , Zheng H , Liu Q , Zhang Y , Wang Q
Ref : PLoS ONE , 7 :e36987 , 2012
Abstract : Edwardsiella bacteria are leading fish pathogens causing huge losses to aquaculture industries worldwide. E. tarda is a broad-host range pathogen that infects more than 20 species of fish and other animals including humans while E. ictaluri is host-adapted to channel catfish causing enteric septicemia of catfish (ESC). Thus, these two species consist of a useful comparative system for studying the intricacies of pathogen evolution. Here we present for the first time the phylogenomic comparisons of 8 genomes of E. tarda and E. ictaluri isolates. Genome-based phylogenetic analysis revealed that E. tarda could be separate into two kinds of genotypes (genotype I, EdwGI and genotype II, EdwGII) based on the sequence similarity. E. tarda strains of EdwGI were clustered together with the E. ictaluri lineage and showed low sequence conservation to E. tarda strains of EdwGII. Multilocus sequence analysis (MLSA) of 48 distinct Edwardsiella strains also supports the new taxonomic relationship of the lineages. We identified the type III and VI secretion systems (T3SS and T6SS) as well as iron scavenging related genes that fulfilled the criteria of a key evolutionary factor likely facilitating the virulence evolution and adaptation to a broad range of hosts in EdwGI E. tarda. The surface structure-related genes may underlie the adaptive evolution of E. ictaluri in the host specification processes. Virulence and competition assays of the null mutants of the representative genes experimentally confirmed their contributive roles in the evolution/niche adaptive processes. We also reconstructed the hypothetical evolutionary pathway to highlight the virulence evolution and niche adaptation mechanisms of Edwardsiella. This study may facilitate the development of diagnostics, vaccines, and therapeutics for this under-studied pathogen.
ESTHER : Yang_2012_PLoS.One_7_e36987
PubMedSearch : Yang_2012_PLoS.One_7_e36987
PubMedID: 22590641
Gene_locus related to this paper: 9gamm-a0a076lfv2

Title : Use of hydrophilic ionic liquids in a two-phase system to improve Mung bean epoxide hydrolases-mediated asymmetric hydrolysis of styrene oxide - Chen_2012_J.Biotechnol_162_183
Author(s) : Chen WJ , Lou WY , Yu CY , Wu H , Zong MH , Smith TJ
Ref : J Biotechnol , 162 :183 , 2012
Abstract : A comparative study was made of Mung bean epoxide hydrolases-catalyzed asymmetric hydrolysis of styrene oxide to (R)-1-phenyl-1,2-ethanediol in an n-hexane/buffer biphasic system containing various hydrophilic ionic liquids (ILs). Compared to the n-hexane/buffer biphasic system alone, addition of a small amount of hydrophilic ILs reduced the amount of non-enzymatic hydrolysis, and improved the reaction rate by up to 22%. The ILs with cation containing an alkanol group, namely [C(2)OHMIM][BF(4)] and [C(2)OHMIM][TfO], and the choline amino acid ILs [Ch][Arg] and [Ch][Pro] were found to be the most suitable co-solvents for the reaction, owing to their good biocompatibility with the enzyme, which led to high initial rates (0.99-1.25mumol/min) and high product e.e.s (95%). When substrate concentration was around 30mM, where optimal performance was observed with the IL-containing systems, the product e.e. was improved from 90% without ILs to >/=95% in the presence of ILs.
ESTHER : Chen_2012_J.Biotechnol_162_183
PubMedSearch : Chen_2012_J.Biotechnol_162_183
PubMedID: 22995740
Gene_locus related to this paper: vigra-Vreh3

Title : Crystal structure of FAS thioesterase domain with polyunsaturated fatty acyl adduct and inhibition by dihomo-gamma-linolenic acid - Zhang_2011_Proc.Natl.Acad.Sci.U.S.A_108_15757
Author(s) : Zhang W , Chakravarty B , Zheng F , Gu Z , Wu H , Mao J , Wakil SJ , Quiocho FA
Ref : Proc Natl Acad Sci U S A , 108 :15757 , 2011
Abstract : Human fatty acid synthase (hFAS) is a homodimeric multidomain enzyme that catalyzes a series of reactions leading to the de novo biosynthesis of long-chain fatty acids, mainly palmitate. The carboxy-terminal thioesterase (TE) domain determines the length of the fatty acyl chain and its ultimate release by hydrolysis. Because of the upregulation of hFAS in a variety of cancers, it is a target for antiproliferative agent development. Dietary long-chain polyunsaturated fatty acids (PUFAs) have been known to confer beneficial effects on many diseases and health conditions, including cancers, inflammations, diabetes, and heart diseases, but the precise molecular mechanisms involved have not been elucidated. We report the 1.48 A crystal structure of the hFAS TE domain covalently modified and inactivated by methyl gamma-linolenylfluorophosphonate. Whereas the structure confirmed the phosphorylation by the phosphonate head group of the active site serine, it also unexpectedly revealed the binding of the 18-carbon polyunsaturated gamma-linolenyl tail in a long groove-tunnel site, which itself is formed mainly by the emergence of an alpha helix (the "helix flap"). We then found inhibition of the TE domain activity by the PUFA dihomo-gamma-linolenic acid; gamma- and alpha-linolenic acids, two popular dietary PUFAs, were less effective. Dihomo-gamma-linolenic acid also inhibited fatty acid biosynthesis in 3T3-L1 preadipocytes and selective human breast cancer cell lines, including SKBR3 and MDAMB231. In addition to revealing a novel mechanism for the molecular recognition of a polyunsaturated fatty acyl chain, our results offer a new framework for developing potent FAS inhibitors as therapeutics against cancers and other diseases.
ESTHER : Zhang_2011_Proc.Natl.Acad.Sci.U.S.A_108_15757
PubMedSearch : Zhang_2011_Proc.Natl.Acad.Sci.U.S.A_108_15757
PubMedID: 21908709
Gene_locus related to this paper: human-FASN

Title : Biochemical effects of acute phoxim administration on antioxidant system and acetylcholinesterase in Oxya chinensis (Thunberg) (Orthoptera: Acrididae) - Wu_2011_Pestic.Biochem.Physiol_100_23
Author(s) : Wu H , Liu J , Zhang R , Zhang J , Guo Y , Ma E
Ref : Pesticide Biochemistry and Physiology , 100 :23 , 2011
Abstract : The study was undertaken to evaluate the effects of different concentrations of phoxim on acetylcholinesterase (AChE) and esterase (EST) activities, and antioxidant system after topical application to Oxya chinensis. The results showed that phoxim inhibited AChE activity, and did not cause significant changes in the EST activity and the levels of malondialdehyde (MDA) and reduced glutathione (GSH). After phoxim administration, superoxide (SOD) and catalase (CAT) activities showed a biphasic response with an initial increase followed by a decline in their activities. Glutathione reductase (GR) and glutathione peroxidase (GPx) activities were inhibited in comparison with the control. Glutathione S-transferase (GST) activity showed irregular changes. Its activity increased significantly at the concentrations of 0.06 and 0.12 ug/uL and decreased at the concentrations of 0.09 and 0.24 ug/uL compared with the control. Changes in SOD, CAT, GST, GPx, and GR activities indicated that phoxim caused oxidative damage in O. chinensis. However, no significant changes in MDA content suggested that these enzymes played important roles in scavenging the oxidative free radicals induced by phoxim in O. chinensis. The formation of oxygen free radicals might be a factor in the toxicity of phoxim.
ESTHER : Wu_2011_Pestic.Biochem.Physiol_100_23
PubMedSearch : Wu_2011_Pestic.Biochem.Physiol_100_23

Title : Prospecting metagenomic enzyme subfamily genes for DNA family shuffling by a novel PCR-based approach - Wang_2010_J.Biol.Chem_285_41509
Author(s) : Wang Q , Wu H , Wang A , Du P , Pei X , Li H , Yin X , Huang L , Xiong X
Ref : Journal of Biological Chemistry , 285 :41509 , 2010
Abstract : DNA family shuffling is a powerful method for enzyme engineering, which utilizes recombination of naturally occurring functional diversity to accelerate laboratory-directed evolution. However, the use of this technique has been hindered by the scarcity of family genes with the required level of sequence identity in the genome database. We describe here a strategy for collecting metagenomic homologous genes for DNA shuffling from environmental samples by truncated metagenomic gene-specific PCR (TMGS-PCR). Using identified metagenomic gene-specific primers, twenty-three 921-bp truncated lipase gene fragments, which shared 64-99% identity with each other and formed a distinct subfamily of lipases, were retrieved from 60 metagenomic samples. These lipase genes were shuffled, and selected active clones were characterized. The chimeric clones show extensive functional and genetic diversity, as demonstrated by functional characterization and sequence analysis. Our results indicate that homologous sequences of genes captured by TMGS-PCR can be used as suitable genetic material for DNA family shuffling with broad applications in enzyme engineering.
ESTHER : Wang_2010_J.Biol.Chem_285_41509
PubMedSearch : Wang_2010_J.Biol.Chem_285_41509
PubMedID: 20962349

Title : Genome sequencing and analysis of the model grass Brachypodium distachyon. -
Author(s) : Vogel JP , Garvin DF , Mockler TC , Schmutz J , Rokhsar D , Bevan MW , Barry K , Lucas S , Harmon-Smith M , Lail K , Tice H , Grimwood J , McKenzie N , Huo N , Gu YQ , Lazo GR , Anderson OD , You FM , Luo MC , Dvorak J , Wright J , Febrer M , Idziak D , Hasterok R , Lindquist E , Wang M , Fox SE , Priest HD , Filichkin SA , Givan SA , Bryant DW , Chang JH , Wu H , Wu W , Hsia AP , Schnable PS , Kalyanaraman A , Barbazuk B , Michael TP , Hazen SP , Bragg JN , Laudencia-Chingcuanco D , Weng Y , Haberer G , Spannagl M , Mayer K , Rattei T , Mitros T , Lee SJ , Rose JK , Mueller LA , York TL , Wicker T , Buchmann JP , Tanskanen J , Schulman AH , Gundlach H , Bevan M , de Oliveira AC , Maia Lda C , Belknap W , Jiang N , Lai J , Zhu L , Ma J , Sun C , Pritham E , Salse J , Murat F , Abrouk M , Bruggmann R , Messing J , Fahlgren N , Sullivan CM , Carrington JC , Chapman EJ , May GD , Zhai J , Ganssmann M , Gurazada SG , German M , Meyers BC , Green PJ , Tyler L , Wu J , Thomson J , Chen S , Scheller HV , Harholt J , Ulvskov P , Kimbrel JA , Bartley LE , Cao P , Jung KH , Sharma MK , Vega-Sanchez M , Ronald P , Dardick CD , De Bodt S , Verelst W , Inz D , Heese M , Schnittger A , Yang X , Kalluri UC , Tuskan GA , Hua Z , Vierstra RD , Cui Y , Ouyang S , Sun Q , Liu Z , Yilmaz A , Grotewold E , Sibout R , Hematy K , Mouille G , Hofte H , Michael T , Pelloux J , O'Connor D , Schnable J , Rowe S , Harmon F , Cass CL , Sedbrook JC , Byrne ME , Walsh S , Higgins J , Li P , Brutnell T , Unver T , Budak H , Belcram H , Charles M , Chalhoub B , Baxter I
Ref : Nature , 463 :763 , 2010
PubMedID: 20148030
Gene_locus related to this paper: bradi-i1grm0 , bradi-i1gx82 , bradi-i1hb80 , bradi-i1hkv6 , bradi-i1hpu6 , bradi-i1i3e4 , bradi-i1i9i0 , bradi-i1i435 , bradi-i1ix93 , bradi-i1gsk6 , bradi-i1hk44 , bradi-i1hk45 , bradi-i1hnk7 , bradi-i1hsd5 , bradi-i1huy4 , bradi-i1huy9 , bradi-i1huz0 , bradi-i1gxx9 , bradi-i1hl25 , bradi-i1hcw7 , bradi-i1hyv6 , bradi-i1hyb5 , bradi-i1hvr8 , bradi-i1hmu2 , bradi-i1hf05 , bradi-i1gry7 , bradi-i1hf06 , bradi-i1i5z8 , bradi-i1icy3 , bradi-i1j1h3 , bradi-i1h1e3 , bradi-i1hvr9 , bradi-a0a0q3r7i7 , bradi-i1i377 , bradi-i1hjg5 , bradi-i1h3i9 , bradi-i1gsg5 , bradi-a0a0q3mph9 , bradi-i1h682 , bradi-a0a0q3lc91 , bradi-i1gx49 , bradi-i1i839 , bradi-a0a2k2dsp5 , bradi-i1gsb5

Title : EQCM immunoassay for phosphorylated acetylcholinesterase as a biomarker for organophosphate exposures based on selective zirconia adsorption and enzyme-catalytic precipitation - Wang_2009_Biosens.Bioelectron_24_2377
Author(s) : Wang H , Wang J , Choi D , Tang Z , Wu H , Lin Y
Ref : Biosensors & Bioelectronics , 24 :2377 , 2009
Abstract : A zirconia (ZrO(2)) adsorption-based immunoassay by electrochemical quartz crystal microbalance (EQCM) has been initially developed, aiming at the detection of phosphorylated acetylcholinesterase (Phospho-AChE) as a potential biomarker for bio-monitoring exposures to organophosphate (OP) pesticides and chemical warfare agents. Hydroxyl-derivatized monolayer was preferably chosen to modify the crystal serving as the template for directing the electro-deposition of ZrO(2) film with uniform nanostructures. The resulting ZrO(2) film was utilized to selectively capture Phospho-AChE from the sample media. Horseradish peroxidase (HRP)-labeled anti-AChE antibodies were further employed to recognize the captured phosphorylated proteins. Enzyme-catalytic oxidation of the benzidine substrate resulted in the accumulation of insoluble product on the functionalized crystal. Ultrasensitive EQCM quantification by mass-amplified frequency responses as well as rapid qualification by visual color changes of product could be thus, achieved. Moreover, 4-chloro-1-naphthol (CN) was studied as an ideal chromogenic substrate for the enzyme-catalytic precipitation. Experimental results show that the developed EQCM technique can allow for the detection of Phospho-AChE in human plasma with a detection limit of 0.020 nM. Such an EQCM immunosensing format opens a new door towards the development of simple, sensitive, and field-applicable biosensor for biologically monitoring low-level OP exposures.
ESTHER : Wang_2009_Biosens.Bioelectron_24_2377
PubMedSearch : Wang_2009_Biosens.Bioelectron_24_2377
PubMedID: 19135350

Title : Procyanidins extracted from the lotus seedpod ameliorate scopolamine-induced memory impairment in mice - Xu_2009_Phytother.Res_23_1742
Author(s) : Xu J , Rong S , Xie B , Sun Z , Zhang L , Wu H , Yao P , Zhang Y , Liu L
Ref : Phytother Res , 23 :1742 , 2009
Abstract : The major purpose of this study was to determine the effect of procyanidins extracted from the lotus seedpod (LSPC) on the learning and memory impairments induced by scopolamine (1 mg/kg, i.p.) in mice. The capacities of memory and learning were evaluated by the Morris water maze and the step-down avoidance test. LSPC (50, 100, 150 mg/kg BW, p.o.) significantly reversed scopolamine-induced learning and memory impairments in the Morris water maze test, as evaluated by shortened escape latency and swimming distance. In the step-down avoidance test, LSPC (50, 100, 150 mg/kg BW, p.o.) treatment significantly reduced the number of errors and shortened latency compared with that of scopolamine. In addition, LSPC was also found to inhibit acetyl cholinesterase (AChE) activity. These results of this study suggest that LSPC may play a useful role in the treatment of cognitive impairment caused by AD and aging.
ESTHER : Xu_2009_Phytother.Res_23_1742
PubMedSearch : Xu_2009_Phytother.Res_23_1742
PubMedID: 19367674

Title : Efficiently enhancing regioselective acylation of 5-azacytidine catalysed by Candida antarctica lipase B with co-solvent mixtures as the reaction media - Wu_2009_Biotechnol.Appl.Biochem_53_201
Author(s) : Wu H , Zong M , Chen X
Ref : Biotechnol Appl Biochem , 53 :201 , 2009
Abstract : A comparative study of regioselective acylation of 5-azacytidine catalysed by CAL-B (Candida antarctica lipase B) in co-solvent mixtures and in pure organic solvents was performed, to our knowledge for the first time, and it was shown that a remarkable enhancement in the initial rate and substrate conversion in the reaction could be achieved with co-solvents as the reaction medium instead of pure organic solvents. For the CAL-B-catalysed regioselective synthesis of 5'-O-butyryl-5-azacytidine in co-solvent mixtures, the optimal conditions were as follows: optimal co-solvent mixture, hexane/pyridine (40/60, v/v); initial aw (water activity), 0.07; enzyme dosage, 50 units/ml; vinyl butyrate/5-azacytidine molar ratio, 15:1; temperature, 60 degrees C. Under the optimal conditions, v0 (the initial reaction rate), C (the substrate conversion) and the regioselectivity of the reaction were 0.75 mM/min, 99.0% and above 99% respectively. Similar phenomena were observed in the CAL-B-catalysed regioselective acylation of 5-azacytidine with an extensive range of fatty acid vinyl esters (from C2 to C18). Compared with pure pyridine, the reactions were greatly accelerated in a hexane/pyridine (40/60, v/v) co-solvent mixture and 5-azacytidine could be biotransformed into its derivative 5'-O-acyl-5-azacytidine at a much higher conversion rate (91.4-99.0% as against 40.2-43.5%). Meanwhile, adoption of a co-solvent mixture as the reaction medium could also greatly lower the enzyme dosage and the molar ratio of acyl donor to 5-azacytidine.
ESTHER : Wu_2009_Biotechnol.Appl.Biochem_53_201
PubMedSearch : Wu_2009_Biotechnol.Appl.Biochem_53_201
PubMedID: 19152503

Title : Genome sequence of the versatile fish pathogen Edwardsiella tarda provides insights into its adaptation to broad host ranges and intracellular niches - Wang_2009_PLoS.One_4_e7646
Author(s) : Wang Q , Yang M , Xiao J , Wu H , Wang X , Lv Y , Xu L , Zheng H , Wang S , Zhao G , Liu Q , Zhang Y
Ref : PLoS ONE , 4 :e7646 , 2009
Abstract : BACKGROUND: Edwardsiella tarda is the etiologic agent of edwardsiellosis, a devastating fish disease prevailing in worldwide aquaculture industries. Here we describe the complete genome of E. tarda, EIB202, a highly virulent and multi-drug resistant isolate in China. METHODOLOGY/PRINCIPAL FINDINGS: E. tarda EIB202 possesses a single chromosome of 3,760,463 base pairs containing 3,486 predicted protein coding sequences, 8 ribosomal rRNA operons, and 95 tRNA genes, and a 43,703 bp conjugative plasmid harboring multi-drug resistant determinants and encoding type IV A secretion system components. We identified a full spectrum of genetic properties related to its genome plasticity such as repeated sequences, insertion sequences, phage-like proteins, integrases, recombinases and genomic islands. In addition, analysis also indicated that a substantial proportion of the E. tarda genome might be devoted to the growth and survival under diverse conditions including intracellular niches, with a large number of aerobic or anaerobic respiration-associated proteins, signal transduction proteins as well as proteins involved in various stress adaptations. A pool of genes for secretion systems, pili formation, nonfimbrial adhesions, invasions and hemagglutinins, chondroitinases, hemolysins, iron scavenging systems as well as the incomplete flagellar biogenesis might feature its surface structures and pathogenesis in a fish body. CONCLUSION/SIGNIFICANCE: Genomic analysis of the bacterium offered insights into the phylogeny, metabolism, drug-resistance, stress adaptation, and virulence characteristics of this versatile pathogen, which constitutes an important first step in understanding the pathogenesis of E. tarda to facilitate construction of a practical effective vaccine used for combating fish edwardsiellosis.
ESTHER : Wang_2009_PLoS.One_4_e7646
PubMedSearch : Wang_2009_PLoS.One_4_e7646
PubMedID: 19865481
Gene_locus related to this paper: edwte-d0zav8 , edwte-d0zg19 , edwtf-e0t1p5 , edwte-d0za01 , edwte-d0z9v1

Title : BZYX, a novel acetylcholinesterase inhibitor, significantly improved chemicals-induced learning and memory impairments on rodents and protected PC12 cells from apoptosis induced by hydrogen peroxide - Zhang_2009_Eur.J.Pharmacol_613_1
Author(s) : Zhang J , Zhu D , Sheng R , Wu H , Hu Y , Wang F , Cai T , Yang B , He Q
Ref : European Journal of Pharmacology , 613 :1 , 2009
Abstract : BZYX was designed as a dual-binding-site acetylcholinesterase (AChE) inhibitor and selected from series of indanone derivatives. The present study was designed to examine the cognition-enhanced, anti-cholinesterase, and neuroprotective effects of BZYX. In the passive avoidance performance and radial arm maze, BZYX showed a comparable effect to donepezil and rivastigmine on memory deficits in different stages induced by scopolamine, NaNO(2) and ethanol, respectively. Ellman's assay indicated BZYX exhibited high inhibition on AChE activity. IC(50) values for BZYX: 0.058+/-0.022 microM; donepezil: 0.019+/-0.004 microM; rivastigmine: 3.81+/-2.81 microM; glantamine: 3.01+/-1.85 microM and huperzine A: 0.053+/-0.016 microM. BZYX also presented great neuroprotecive function from apoptosis induced by hydrogen peroxide(H(2)O(2)) in PC12 cells. MTT assay and Annexin V-FITC Apoptosis Detection showed the viability of PC12 cells remarkably decreased with 400 microM H(2)O(2), while it significantly increased when the cells were pretreated with 0.1-1.0 microM BZYX. BZYX pretreatment remarkably reversed the loss of mitochondria membrane potential (DeltaPsim), scavenged reactive oxygen species formation induced by H(2)O(2) and resulted in up-regulation of procaspase3 and xIAP protein level and down-regulation of phosphorylated JNK protein, p53 protein level and cleavage of caspase 3. It is speculated that the mitochondrial pathway, mediated by Bcl-2 family and Mitogen-Activated Protein Kinases (MAPKs), might involved in the neuroprotection of BZYX. These results first demonstrated that BZYX had neuroprotective effects as well as cognition enhancement and acetylcholinesterase inhibition. It is hopeful that BZYX becomes a potential candidate for use in the intervention for neurodegenerative diseases.
ESTHER : Zhang_2009_Eur.J.Pharmacol_613_1
PubMedSearch : Zhang_2009_Eur.J.Pharmacol_613_1
PubMedID: 19345205

Title : Rejuvenation of antioxidant and cholinergic systems contributes to the effect of procyanidins extracted from the lotus seedpod ameliorating memory impairment in cognitively impaired aged rats - Xu_2009_Eur.Neuropsychopharmacol_19_851
Author(s) : Xu J , Rong S , Xie B , Sun Z , Zhang L , Wu H , Yao P , Zhang X , Zhang Y , Liu L
Ref : European Neuropsychopharmacology , 19 :851 , 2009
Abstract : The major purpose of this study was to determine the effect of procyanidins extracted from the lotus seedpod (LSPC) on the learning and memory impairments in cognitively impaired aged rats. Based on Morris water maze performance compared with young female rats, aged unimpaired (AU) and aged impaired (AI) rats were chosen from aged female rats. LSPC supplementation (50, 100 mg/kg BW, p.o.) for 7 weeks significantly improved learning and memory impairments in AI animals in the Morris water maze test, as evaluated by shortened escape latency and swimming distance. Aged rats had significantly declined antioxidant defense capacities and significantly increased lipid peroxidation and protein oxidation levels in hippocampus and cerebral cortex than young rats. Further, AI group had higher protein oxidation level compared with AU group. LSPC (50, 100 mg/kg BW, p.o.) significantly reversed the decline of antioxidant defense capacities and significantly reduced lipid peroxidation and protein oxidation levels in hippocampus and cerebral cortex of AI rats. In addition, LSPC significantly restored acetylcholine (ACh) contents and acetylcholinesterase (AChE) activities in hippocampus and cerebral cortex of AI animals. The results of this study suggest that LSPC may play a useful role in the treatment of cognitive impairment caused by Alzheimer's disease and aging.
ESTHER : Xu_2009_Eur.Neuropsychopharmacol_19_851
PubMedSearch : Xu_2009_Eur.Neuropsychopharmacol_19_851
PubMedID: 19716273

Title : Effect of tanshinone on the levels of nitric oxide synthase and acetylcholinesterase in the brain of Alzheimer's disease rat model - Yin_2008_Clin.Invest.Med_31_E248
Author(s) : Yin Y , Huang L , Liu Y , Huang S , Zhuang J , Chen X , Zhang L , Wu H , Shao F , Zhao Z
Ref : Clinical Investigation Med , 31 :E248 , 2008
Abstract : PURPOSE: To determine the influence of tanshinone on the levels of nitric oxide synthase (NOS) and acetylcholinesterase (AChE) in the brain of an Alzheimer's Disease (AD) rat model and on its potential therapeutic mechanism. METHODS: 100 Male Sprague Dawley rats were divided into three groups: control group, model group and tanshinone treatment group. 10 microg A beta 1-42 was injected bilaterally into the dorsal lateral region of the dentate gyrus in the hippocampus of rats in the model and tanshinone treatment groups to prepare the AD models. 24h after modeling, tanshinone, 50mg/kg, was administered by gastric perfusion to rats in the tanshinone treatment group. Later, immunohistochemical assay and Western blot analysis were used to detect expression of neuronal NOS (nNOS) and inducible NOS (iNOS) in the rat hippocampus. Activity of AChE in each subregion (CA1 approximately CA4) of rats' hippocampus was determined by a histochemical technique. RESULTS: Expression of nNOS in the model group was down-regulated whereas iNOS was up-regulated. After A beta 1-42 injection, the number of AChE positive fibers in each subregion (CA1 approximately CA4) of the hippocampus was decreased compared with controls. With tanshinone administration, the changes were improved to varying degrees. CONCLUSION: Tanshinone modulates AChE and NOS proteins concentrations in the hippocampus of AD rats. This may have therapeutic potential in AD rats.
ESTHER : Yin_2008_Clin.Invest.Med_31_E248
PubMedSearch : Yin_2008_Clin.Invest.Med_31_E248
PubMedID: 18980714

Title : Improvement of biodiesel production by lipozyme TL IM-catalyzed methanolysis using response surface methodology and acyl migration enhancer - Wang_2008_Bioresour.Technol_99_7232
Author(s) : Wang Y , Wu H , Zong MH
Ref : Bioresour Technol , 99 :7232 , 2008
Abstract : The process of biodiesel production from corn oil catalyzed by lipozyme TL IM, an inexpensive 1,3-position specific lipase from Thermomyces lanuginosus was optimized by response surface methodology (RSM) and a central composite rotatable design (CCRD) was used to study the effects of enzyme dosage, ratio of t-butanol to oil (v/v) and ratio of methanol to oil (mol/mol) on the methyl esters (ME) yield of the methanolysis. The optimum combinations for the reaction were 25.9U/goil of enzyme, 0.58 volume ratio of t-butanol to oil and 0.5, 0.5, 2.8 molar equivalent of methanol to oil added at the reaction time of 0, 2, and 4h, respectively, by which a ME yield of 85.6%, which was very close to the predicted value of 85.0%, could be obtained after reaction for 12h. Waste oil was found to be more suitable feedstock, and could give 93.7% ME yield under the optimum conditions described above. Adding triethylamine (TEA), an acyl migration enhancer, could efficiently improve the ME yield of the methanolysis of corn oil, giving a ME yield of 92.0%.
ESTHER : Wang_2008_Bioresour.Technol_99_7232
PubMedSearch : Wang_2008_Bioresour.Technol_99_7232
PubMedID: 18262410
Gene_locus related to this paper: humla-1lipa

Title : [A rapid multi-residual analysis for organophosphorus pesticides in the products of animal origin using gas chromatography coupled with accelerated solvent extraction and gel permeation chromatographic purification] - Wu_2008_Se.Pu_26_577
Author(s) : Wu G , Bao X , Wang H , Yu C , Wu H , Ye Q
Ref : Se Pu , 26 :577 , 2008
Abstract : A rapid method has been developed to determine the multi-residues of 36 organophosphorus pesticides in the products of animal origin using capillary gas chromatography with flame photometric detector (GC-FPD (P)). The organophosphorus pesticides were extracted with acetonitrile by accelerated solvent extraction, and cleaned up by auto gel permeation chromatography and primary secondary amine (PSA) packing material. The collected solution was analyzed by the GC-FPD (P) and quantified by internal standard method. The 36 organophosphorus pesticides were separated efficiently from impurity in high sensitivity and reproducibility by GC-FPD (P). The limits of detection (LODs) ranged from 0.0012 mg/kg (phorate) to 0.014 mg/kg (pyraclofos), and the limits of quantitation (LOQs) ranged from 0.004 mg/kg (phorate) to 0.047 mg/kg (pyraclofos). The recoveries ranged from 58.2% to 106.3% in blank samples spiked with 0.05, 0.1 and 0.2 mg/kg of 36 organophosphorus pesticides. The LODs, LOQs and the recoveries of the method all satisfy the requirement of pesticide residue analysis.
ESTHER : Wu_2008_Se.Pu_26_577
PubMedSearch : Wu_2008_Se.Pu_26_577
PubMedID: 19160756

Title : Highly efficient regioselective synthesis of 5'-O-lauroyl-5-azacytidine catalyzed by Candida antarctica Lipase B - Chen_2008_Appl.Biochem.Biotechnol_151_21
Author(s) : Chen XY , Zong MH , Lou WY , Wu H
Ref : Appl Biochem Biotechnol , 151 :21 , 2008
Abstract : Enzymatic regioselective acylation of 5-azacytidine with vinyl laurate was successfully conducted with an immobilized lipase from Candida antarctica type B (i.e., Novozym 435) for the first time. The acylation of 5-azacytidine took place at its primary hydroxyl group and the desired product 5'-O -lauroyl-5-azacytidine could be prepared with high reaction rate, high conversion, and excellent regioselectivity. The influences of several key variables on the enzymatic acylation were also systematically examined. Pyridine was found to be the best reaction medium. The optimum initial water activity, the molar ratio of vinyl laurate to 5-azacytidine and reaction temperature were 0.07, 30:1, and 50 degrees C, respectively. Under the optimized conditions described above, the initial reaction rate, the substrate conversion, and the regioselectivity were as high as 0.58 mM/min, 95.5%, and >99%, respectively, after a reaction time of around 5 h.
ESTHER : Chen_2008_Appl.Biochem.Biotechnol_151_21
PubMedSearch : Chen_2008_Appl.Biochem.Biotechnol_151_21
PubMedID: 18785019

Title : Induction of GABAergic postsynaptic differentiation by alpha-neurexins - Kang_2008_J.Biol.Chem_283_2323
Author(s) : Kang Y , Zhang X , Dobie F , Wu H , Craig AM
Ref : Journal of Biological Chemistry , 283 :2323 , 2008
Abstract : Beta-neurexin and neuroligin cell adhesion molecules contribute to synapse development in the brain. The longer alpha-neurexins function at both glutamate and gamma-aminobutyric acid (GABA) synapses in coupling to presynaptic calcium channels. Binding of alpha-neurexins to neuroligins was recently reported, but the role of the alpha-neurexins in synapse development has not been well studied. Here we report that in COS cell neuron coculture assays, all three alpha-neurexins induce clustering of the GABAergic postsynaptic scaffolding protein gephyrin and neuroligin 2 but not of the glutamatergic postsynaptic scaffolding protein PSD-95 or neuroligin 1/3/4. alpha-Neurexins also induce clustering of the GABA(A) receptor gamma2 subunit. This synapse promoting activity of alpha-neurexins is mediated by the sixth LNS (laminin neurexin sex hormone-binding protein) domain and negatively modulated by upstream sequences. Although inserts at splice site 4 (S4) in beta-neurexins promote greater clustering activity for GABA than glutamate proteins in coculture assay, alpha-neurexin-specific sequences confer complete specificity for GABA proteins. We further report a developmental increase in the ratio of -S4 to +S4 forms of neurexins correlating with an increase in glutamate relative to GABA synaptogenesis and activity regulation of splicing at S4. Thus, +S4 beta-neurexins and, even more selectively, alpha-neurexins may be mediators of GABAergic synaptic protein recruitment and stabilization.
ESTHER : Kang_2008_J.Biol.Chem_283_2323
PubMedSearch : Kang_2008_J.Biol.Chem_283_2323
PubMedID: 18006501

Title : Carboxylesterase 2 is downregulated in colorectal cancer following progression of the disease - Tang_2008_Cancer.Invest_26_178
Author(s) : Tang X , Wu H , Wu Z , Wang G , Wang Z , Zhu D
Ref : Cancer Invest , 26 :178 , 2008
Abstract : Expression of carboxylesterase 2 in colorectal tumor tissues and serum carboxylesterase 2 levels at different stages of the disease were investigated by Western blotting. Carboxylesterase 2 was decreasing in tumor tissues from TNM stages 0 through IV (n = 20); the expression of carboxylesterase 2 was similar between "normal" and tumor tissues (n = 20); serum carboxylesterase 2 levels were similar among patients at different stages of the disease. These results indicate that local expression of carboxylesterase 2 is downregulated following progression of the disease; carboxylesterase 2 expression is altered in histology "normal" tissues from stages I through IV before histopathological changes.
ESTHER : Tang_2008_Cancer.Invest_26_178
PubMedSearch : Tang_2008_Cancer.Invest_26_178
PubMedID: 18259949

Title : Genome sequence of a nephritogenic and highly transformable M49 strain of Streptococcus pyogenes - McShan_2008_J.Bacteriol_190_7773
Author(s) : McShan WM , Ferretti JJ , Karasawa T , Suvorov AN , Lin S , Qin B , Jia H , Kenton S , Najar F , Wu H , Scott J , Roe BA , Savic DJ
Ref : Journal of Bacteriology , 190 :7773 , 2008
Abstract : The 1,815,783-bp genome of a serotype M49 strain of Streptococcus pyogenes (group A streptococcus [GAS]), strain NZ131, has been determined. This GAS strain (FCT type 3; emm pattern E), originally isolated from a case of acute post-streptococcal glomerulonephritis, is unusually competent for electrotransformation and has been used extensively as a model organism for both basic genetic and pathogenesis investigations. As with the previously sequenced S. pyogenes genomes, three unique prophages are a major source of genetic diversity. Two clustered regularly interspaced short palindromic repeat (CRISPR) regions were present in the genome, providing genetic information on previous prophage encounters. A unique cluster of genes was found in the pathogenicity island-like emm region that included a novel Nudix hydrolase, and, further, this cluster appears to be specific for serotype M49 and M82 strains. Nudix hydrolases eliminate potentially hazardous materials or prevent the unbalanced accumulation of normal metabolites; in bacteria, these enzymes may play a role in host cell invasion. Since M49 S. pyogenes strains have been known to be associated with skin infections, the Nudix hydrolase and its associated genes may have a role in facilitating survival in an environment that is more variable and unpredictable than the uniform warmth and moisture of the throat. The genome of NZ131 continues to shed light upon the evolutionary history of this human pathogen. Apparent horizontal transfer of genetic material has led to the existence of highly variable virulence-associated regions that are marked by multiple rearrangements and genetic diversification while other regions, even those associated with virulence, vary little between genomes. The genome regions that encode surface gene products that will interact with host targets or aid in immune avoidance are the ones that display the most sequence diversity. Thus, while natural selection favors stability in much of the genome, it favors diversity in these regions.
ESTHER : McShan_2008_J.Bacteriol_190_7773
PubMedSearch : McShan_2008_J.Bacteriol_190_7773
PubMedID: 18820018
Gene_locus related to this paper: strpy-ESTA , strpy-PEPXP , strpy-SPY1308

Title : Comparisons of malathion susceptibility, target sensitivity, and detoxification enzyme activity in nine field populations of Oxya chinensis (Orthoptera: Acrididae) - Wu_2007_J.Econ.Entomol_100_1409
Author(s) : Wu H , Yang M , Guo Y , Xie Z , Ma E
Ref : J Econ Entomol , 100 :1409 , 2007
Abstract : The malathion susceptibility, acetylcholinesterase (AChE) sensitivity, and the activity of selected detoxification enzymes including general esterase (EST) and glutathione S-transferase (GST) were compared among field populations of the grasshopper Oxya chinensis (Thunberg) (Orthoptera: Acrididae) collected from nine regions of China. Bioassay results showed that these populations had various levels of the susceptibility to malathion with the LDo values ranging from 1.4- to 22.6-fold compared with the most susceptible population (Xiangyuan or XY). The Jinnan (JN) population seemed to be malathion resistant (22.6-fold), whereas other populations exhibited 1.4- to 6.8-fold reduced malathion susceptibility with a rank order of Changan > Baodi > Hanzhong > Xinxiang > Yinchuan > Beidagang > Jinyuan. It seemed that the observed malathion resistance in the JN population was attributed to at least two resistance mechanisms, including increased EST activity (2.2-fold) and reduced sensitivity of AChE to inhibition by malaoxon (4.6-fold) compared with those of the XY population. In contrast, differential malathion susceptibilities in other populations may be due to increased activities of certain detoxification enzymes (e.g., EST and GST), reduced sensitivity of AChE, or other factors, which were not consistent across the populations examined. Such differential susceptibilities to malathion were likely due to different population habitats (e.g., grasslands, rice [Oryza sativa L.]-producing regions) with very different insecticide application histories and pest management practices.
ESTHER : Wu_2007_J.Econ.Entomol_100_1409
PubMedSearch : Wu_2007_J.Econ.Entomol_100_1409
PubMedID: 17849895

Title : Novel and highly regioselective route for synthesis of 5-fluorouridine lipophilic ester derivatives by lipozyme TL IM - Wang_2007_J.Biotechnol_129_689
Author(s) : Wang H , Zong MH , Wu H , Lou WY
Ref : J Biotechnol , 129 :689 , 2007
Abstract : For the first time, lipozyme TL IM, an inexpensive lipase from Thermomyces lanuginosa, was successfully applied to the regioselective synthesis of lipophilic 5-fluorouridine ester derivatives. The ESI-MS and (13)C NMR analysis confirmed that the end products of the acylation were 5'-O-acyl 5-fluorouridines, more powerful anti-tumor drugs than 5-fluorouridine itself. Notably, the chain length of acyl donors had an obvious effect on the initial rate and the maximum substrate conversion of the regioselective acylation. The acylation of 5-fluorouridine with vinyl laurate was used as a model to explore the influence of various factors on the reaction with respect to the initial rate, the maximum substrate conversion and the regioselectivity. The optimum water activity, the molar ratio of vinyl laurate to 5-fluorouridine, reaction temperature and shaking rate were 0.07, 15/1, 45 degrees C and 200rpm, respectively, under which the maximum substrate conversion and the regioselectivity were as high as 98.4 and >99%, respectively, after a reaction time of around 6h.
ESTHER : Wang_2007_J.Biotechnol_129_689
PubMedSearch : Wang_2007_J.Biotechnol_129_689
PubMedID: 17368851

Title : Two gene determinants are differentially involved in the biogenesis of Fap1 precursors in Streptococcus parasanguis - Wu_2007_J.Bacteriol_189_1390
Author(s) : Wu H , Bu S , Newell P , Chen Q , Fives-Taylor P
Ref : Journal of Bacteriology , 189 :1390 , 2007
Abstract : Mature Fap1, a 200-kDa fimbria-associated adhesin, is required for fimbrial biogenesis and biofilm formation in Streptococcus parasanguis. Fap1-like proteins are found in the genomes of many streptococcal and staphylococcal species. Fap1 is a serine-rich glycoprotein modified by O-linked glycan moieties. In this study, we identified a seven-gene cluster including secY2, orf1, orf2, orf3, secA2, gtf1, and gtf2 that is localized immediately downstream of fap1. The lower G+C contents and the presence of a putative transposase element suggest that this gene cluster was horizontally transferred from other bacteria and represents a genomic island. At least two genes in this island mediated Fap1 biogenesis. Mutation of a glucosyltransferase (Gtf1) gene led to accumulation of a Fap1 precursor, which had no detectable glycan moieties. Inactivation of a gene coding for an accessory Sec protein (SecY2) resulted in expression of a distinct Fap1 precursor, which reacted with one glycan-specific Fap1 antibody but not with another glycan-specific antibody. Furthermore, partially glycosylated Fap1 was detected on the cell surface and in the culture supernatant. These data suggest that SecY2 has a role in complete glycosylation of Fap1 and imply that SecY2 is not the only translocation channel for the Fap1 precursor and that alternative secretion machinery exists. Together, Gtf1 and SecY2 are involved in biogenesis of two distinct Fap1 precursors in S. parasanguis. Discovery of the effect of an accessory Sec protein on Fap1 glycosylation suggests that Fap1 secretion and glycosylation are coupled during Fap1 biogenesis.
ESTHER : Wu_2007_J.Bacteriol_189_1390
PubMedSearch : Wu_2007_J.Bacteriol_189_1390
PubMedID: 16997950

Title : Cloning, identification and expression of an entE homologue angE from Vibrio anguillarum serotype O1 - Liu_2004_Arch.Microbiol_181_287
Author(s) : Liu Q , Ma Y , Wu H , Shao M , Liu H , Zhang Y
Ref : Arch Microbiol , 181 :287 , 2004
Abstract : Anguibactin, an important virulent factor in Vibrio anguillarum serotype O1, is synthesized by a nonribosomal peptide synthetases (NRPS) system encoded on a 65-kb virulence plasmid pJM1. angE, as one of the NRPS genes, is responsible for selecting and activating 2,3-dihydroxybenzoic acid (2,3-DHBA), an important precursor in anguibactin synthesis, into 2,3-DHBA-AMP by adenylylation in the presence of ATP. In this work, an entE homologue, angE, was identified on pEIB1 (a pJM1-like plasmid) from virulent V. anguillarum serotype O1 strain MVM425. A recombinant clone carrying the complete angE was able to complement an Escherichia coli entE mutant. The angE-encoded protein was overexpressed in E. coli and purified by a three-step procedure. Purified AngE was then used to establish an in vitro enzymatic reaction in which its enzymatic activity of 1-(5'-monophosphate adenyl) 2,3-dihydroxybenzoic acid ligase (2,3-DHBA-AMP ligase) was proved using HPLC to detect AMP formation in the reaction mixture. Moreover, evidence at the level of both transcription and translation confirmed that angE was actively expressed in vivo in V. anguillarum MVM425, and interestingly, unlike many other iron-uptake-system-related genes, its expression is not induced by a low iron concentration in the surrounding environment.
ESTHER : Liu_2004_Arch.Microbiol_181_287
PubMedSearch : Liu_2004_Arch.Microbiol_181_287
PubMedID: 14758470
Gene_locus related to this paper: viban-sast

Title : Cloning and expression of the polyhydroxyalkanote depolymerase gene from Pseudomonas putida, and characterization of the gene product - Jiang_2004_Biotechnol.Lett_26_1585
Author(s) : Jiang Y , Ye J , Wu H , Zhang H
Ref : Biotechnol Lett , 26 :1585 , 2004
Abstract : A polyhydroxyalkanote (PHA) depolymerase gene ( pha Z) was cloned by PCR from Pseudomonas putida and over-expressed in Escherichia coli as inclusion bodies. Nucleotide sequence analysis predicted an 852 bp open reading frame encoding a protein of 283 amino acids with a predicted molecular weight of 31283 Da. The deduced amino acid sequence had at least 80% homology to the PHA depolymerase from other Pseudomonas strains and consisted a conserved lipase box-like sequence (G-X-S(102)-X-G). The inclusion bodies were refolded and biochemically characterized. The depolymerase activity was optimal at 40 degrees C and pH 8.
ESTHER : Jiang_2004_Biotechnol.Lett_26_1585
PubMedSearch : Jiang_2004_Biotechnol.Lett_26_1585
PubMedID: 15604801

Title : Genome sequence of Shigella flexneri 2a: insights into pathogenicity through comparison with genomes of Escherichia coli K12 and O157 - Jin_2002_Nucleic.Acids.Res_30_4432
Author(s) : Jin Q , Yuan Z , Xu J , Wang Y , Shen Y , Lu W , Wang J , Liu H , Yang J , Yang F , Zhang X , Zhang J , Yang G , Wu H , Qu D , Dong J , Sun L , Xue Y , Zhao A , Gao Y , Zhu J , Kan B , Ding K , Chen S , Cheng H , Yao Z , He B , Chen R , Ma D , Qiang B , Wen Y , Hou Y , Yu J
Ref : Nucleic Acids Research , 30 :4432 , 2002
Abstract : We have sequenced the genome of Shigella flexneri serotype 2a, the most prevalent species and serotype that causes bacillary dysentery or shigellosis in man. The whole genome is composed of a 4 607 203 bp chromosome and a 221 618 bp virulence plasmid, designated pCP301. While the plasmid shows minor divergence from that sequenced in serotype 5a, striking characteristics of the chromosome have been revealed. The S.flexneri chromosome has, astonishingly, 314 IS elements, more than 7-fold over those possessed by its close relatives, the non-pathogenic K12 strain and enterohemorrhagic O157:H7 strain of Escherichia coli. There are 13 translocations and inversions compared with the E.coli sequences, all involve a segment larger than 5 kb, and most are associated with deletions or acquired DNA sequences, of which several are likely to be bacteriophage-transmitted pathogenicity islands. Furthermore, S.flexneri, resembling another human-restricted enteric pathogen, Salmonella typhi, also has hundreds of pseudogenes compared with the E.coli strains. All of these could be subjected to investigations towards novel preventative and treatment strategies against shigellosis.
ESTHER : Jin_2002_Nucleic.Acids.Res_30_4432
PubMedSearch : Jin_2002_Nucleic.Acids.Res_30_4432
PubMedID: 12384590
Gene_locus related to this paper: ecoli-Aes , ecoli-yafa , ecoli-ycfp , ecoli-yqia , ecoli-YfhR , shifl-AES , shifl-BIOH , shifl-entf , shifl-FES , shifl-PLDB , shifl-PTRB , shifl-SF1334 , shifl-SF1808 , shifl-SF3046 , shifl-SF3908 , shifl-yafa , shifl-YBFF , shifl-YCDJ , shifl-YCJY , shifl-YFBB , shifl-YHET , shifl-YIEL , shifl-YJFP , shifl-YPFH

Title : MEF2 responds to multiple calcium-regulated signals in the control of skeletal muscle fiber type - Wu_2000_EMBO.J_19_1963
Author(s) : Wu H , Naya FJ , McKinsey TA , Mercer B , Shelton JM , Chin ER , Simard AR , Michel RN , Bassel-Duby R , Olson EN , Williams RS
Ref : EMBO Journal , 19 :1963 , 2000
Abstract : Different patterns of motor nerve activity drive distinctive programs of gene transcription in skeletal muscles, thereby establishing a high degree of metabolic and physiological specialization among myofiber subtypes. Recently, we proposed that the influence of motor nerve activity on skeletal muscle fiber type is transduced to the relevant genes by calcineurin, which controls the functional activity of NFAT (nuclear family of activated T cell) proteins. Here we demonstrate that calcineurin-dependent gene regulation in skeletal myocytes is mediated also by MEF2 transcription factors, and is integrated with additional calcium-regulated signaling inputs, specifically calmodulin-dependent protein kinase activity. In skeletal muscles of transgenic mice, both NFAT and MEF2 binding sites are necessary for properly regulated function of a slow fiber-specific enhancer, and either forced expression of activated calcineurin or motor nerve stimulation up-regulates a MEF2-dependent reporter gene. These results provide new insights into the molecular mechanisms by which specialized characteristics of skeletal myofiber subtypes are established and maintained.
ESTHER : Wu_2000_EMBO.J_19_1963
PubMedSearch : Wu_2000_EMBO.J_19_1963
PubMedID: 10790363

Title : The DNA sequence of human chromosome 22 - Dunham_1999_Nature_402_489
Author(s) : Dunham I , Hunt AR , Collins JE , Bruskiewich R , Beare DM , Clamp M , Smink LJ , Ainscough R , Almeida JP , Babbage AK , Bagguley C , Bailey J , Barlow KF , Bates KN , Beasley OP , Bird CP , Blakey SE , Bridgeman AM , Buck D , Burgess J , Burrill WD , Burton J , Carder C , Carter NP , Chen Y , Clark G , Clegg SM , Cobley VE , Cole CG , Collier RE , Connor R , Conroy D , Corby NR , Coville GJ , Cox AV , Davis J , Dawson E , Dhami PD , Dockree C , Dodsworth SJ , Durbin RM , Ellington AG , Evans KL , Fey JM , Fleming K , French L , Garner AA , Gilbert JGR , Goward ME , Grafham DV , Griffiths MND , Hall C , Hall RE , Hall-Tamlyn G , Heathcott RW , Ho S , Holmes S , Hunt SE , Jones MC , Kershaw J , Kimberley AM , King A , Laird GK , Langford CF , Leversha MA , Lloyd C , Lloyd DM , Martyn ID , Mashreghi-Mohammadi M , Matthews LH , Mccann OT , Mcclay J , Mclaren S , McMurray AA , Milne SA , Mortimore BJ , Odell CN , Pavitt R , Pearce AV , Pearson D , Phillimore BJCT , Phillips SH , Plumb RW , Ramsay H , Ramsey Y , Rogers L , Ross MT , Scott CE , Sehra HK , Skuce CD , Smalley S , Smith ML , Soderlund C , Spragon L , Steward CA , Sulston JE , Swann RM , Vaudin M , Wall M , Wallis JM , Whiteley MN , Willey DL , Williams L , Williams SA , Williamson H , Wilmer TE , Wilming L , Wright CL , Hubbard T , Bentley DR , Beck S , Rogers J , Shimizu N , Minoshima S , Kawasaki K , Sasaki T , Asakawa S , Kudoh J , Shintani A , Shibuya K , Yoshizaki Y , Aoki N , Mitsuyama S , Roe BA , Chen F , Chu L , Crabtree J , Deschamps S , Do A , Do T , Dorman A , Fang F , Fu Y , Hu P , Hua A , Kenton S , Lai H , Lao HI , Lewis J , Lewis S , Lin S-P , Loh P , Malaj E , Nguyen T , Pan H , Phan S , Qi S , Qian Y , Ray L , Ren Q , Shaull S , Sloan D , Song L , Wang Q , Wang Y , Wang Z , White J , Willingham D , Wu H , Yao Z , Zhan M , Zhang G , Chissoe S , Murray J , Miller N , Minx P , Fulton R , Johnson D , Bemis G , Bentley D , Bradshaw H , Bourne S , Cordes M , Du Z , Fulton L , Goela D , Graves T , Hawkins J , Hinds K , Kemp K , Latreille P , Layman D , Ozersky P , Rohlfing T , Scheet P , Walker C , Wamsley A , Wohldmann P , Pepin K , Nelson J , Korf I , Bedell JA , Hillier L , Mardis E , Waterston R , Wilson R , Emanuel BS , Shaikh T , Kurahashi H , Saitta S , Budarf ML , McDermid HE , Johnson A , Wong ACC , Morrow BE , Edelmann L , Kim UJ , Shizuya H , Simon MI , Dumanski JP , Peyrard M , Kedra D , Seroussi E , Fransson I , Tapia I , Bruder CE , O'Brien KP
Ref : Nature , 402 :489 , 1999
Abstract : Knowledge of the complete genomic DNA sequence of an organism allows a systematic approach to defining its genetic components. The genomic sequence provides access to the complete structures of all genes, including those without known function, their control elements, and, by inference, the proteins they encode, as well as all other biologically important sequences. Furthermore, the sequence is a rich and permanent source of information for the design of further biological studies of the organism and for the study of evolution through cross-species sequence comparison. The power of this approach has been amply demonstrated by the determination of the sequences of a number of microbial and model organisms. The next step is to obtain the complete sequence of the entire human genome. Here we report the sequence of the euchromatic part of human chromosome 22. The sequence obtained consists of 12 contiguous segments spanning 33.4 megabases, contains at least 545 genes and 134 pseudogenes, and provides the first view of the complex chromosomal landscapes that will be found in the rest of the genome.
ESTHER : Dunham_1999_Nature_402_489
PubMedSearch : Dunham_1999_Nature_402_489
PubMedID: 10591208
Gene_locus related to this paper: human-CES5A , human-SERHL2

Title : U-95666E: a potential anti-parkinsonian drug with anxiolytic activity - Sethy_1997_Prog.Neuropsychopharmacol.Biol.Psychiatry_21_873
Author(s) : Sethy VH , Ellerbrock BR , Wu H
Ref : Prog Neuropsychopharmacol Biological Psychiatry , 21 :873 , 1997
Abstract : 1. U-95666E, a D2 selective dopamine agonist, was investigated for its effect on rat striatal acetylcholine (ACh) concentration and the results were compared with those obtained with pergolide, pramipexole and bromocriptine under similar conditions. 2. U-95666E, pergolide, pramipexole and bromocriptine dose-dependently increased striatal ACh concentration both in the non-reserpinized and reserpinized rats. 3. Intrinsic activity of U-95666E was similar to pergolide and pramipexole in non-reserpinized rats, but significantly lower in reserpinized rats. 4. The sensitivity of these dopamine agonists for increasing ACh levels in the denervated as compared to innervated striatum were significantly (p < 0.01) higher. 5. U-95666E also has anxiolytic activity in mice. 6. In conclusion, U-95666E may have potential for the treatment of Parkinson's Disease and associated anxiety.
ESTHER : Sethy_1997_Prog.Neuropsychopharmacol.Biol.Psychiatry_21_873
PubMedSearch : Sethy_1997_Prog.Neuropsychopharmacol.Biol.Psychiatry_21_873
PubMedID: 9278957

Title : D2 and D1 dopaminergic activity of 7-OH-DPAT - Sethy_1996_Brain.Res_733_41
Author(s) : Sethy VH , Ellerbrock BR , Fici GJ , Wu H
Ref : Brain Research , 733 :41 , 1996
Abstract : The D1 and D2 dopamine receptor agonist properties of 7-hydroxy-2-(N,N-di-n-propylamino) tetraline (7-OH-DPAT) was determined by investigating the effect of this compound on rat striatal acetylcholine (ACh) concentration and increase in cAMP formation in primary cerebellar granule cell cultures. 7-OH-DPAT at low doses (0.01 to 0.1 mumol/ kg) had no significant effect, and at high doses (0.3 to 30 mumol/kg) significantly (P < 0.01) increased striatal ACh levels. Likewise, quinpirole was found to significantly elevate ACh content. Pretreatment with haloperidol, a non-selective antagonist of the D2 family of receptors, significantly (P < 0.01) blocked 7-OH-DPAT- and quinpirole-induced increases in ACh. U-99194A, a D3 selective dopamine antagonist, had no significant effect on 7-OH-DPAT-induced increases in striatal ACh. However, raclopride, a D2 selective dopamine antagonist, completely blocked 7-OH-DPAT-induced elevations in ACh. 7-OH-DPAT in the mumolar range increased cAMP formation in granule cell cultures, and this effect was antagonized by SCH 23390, a D1 selective dopamine antagonist. The neurochemical study indicates that, at high doses, 7-OH-DPAT has both D1 and D2 agonist activities.
ESTHER : Sethy_1996_Brain.Res_733_41
PubMedSearch : Sethy_1996_Brain.Res_733_41
PubMedID: 8891246

Title : Comparative dopaminergic and muscarinic antagonist activity of clozapine and haloperidol - Sethy_1996_Life.Sci_58_585
Author(s) : Sethy VH , Ellerbrock BR , Wu H
Ref : Life Sciences , 58 :585 , 1996
Abstract : Clozapine is an atypical antipsychotic drug, and its dopamine and muscarinic antagonist activity has been compared with haloperidol in rodents. Elevation in rat striatal acetylcholine (ACh) and mice cerebellar cGMP has been used as an agonist response for oxotremorine and quinpirole. Pretreatment with clozapine significantly blocked oxotremorine-induced elevation in striatal ACh (p<0.01) and cerebellar cGMP(p<0.05). At the same doses, clozapine had no significant effect on quinpirole-induced increases in ACh and cGMP levels. Pretreatment with haloperidol significantly antagonized quinpirole-induced elevation in striatal ACh (p<0.01) and cerebellar cGMP(p<0.05), and haloperidol had no significant effect on oxotremorine-induced agonist responses. Thus, clozapine is antimuscarinic at a dose level that lacks dopamine antagonist properties, whereas haloperidol is a dopamine antagonist and lacks antimuscarinic activity. The atypical neuroleptic profile of clozapine may be due to its high antimuscarinic and low antidopaminergic activity.
ESTHER : Sethy_1996_Life.Sci_58_585
PubMedSearch : Sethy_1996_Life.Sci_58_585
PubMedID: 8632711