Song J

References (55)

Title : The m(6)A modification mediated-lncRNA POU6F2-AS1 reprograms fatty acid metabolism and facilitates the growth of colorectal cancer via upregulation of FASN - Jiang_2024_Mol.Cancer_23_55
Author(s) : Jiang T , Qi J , Xue Z , Liu B , Liu J , Hu Q , Li Y , Ren J , Song H , Xu Y , Xu T , Fan R , Song J
Ref : Mol Cancer , 23 :55 , 2024
Abstract : BACKGROUND: Long noncoding RNAs (lncRNAs) have emerged as key players in tumorigenesis and tumour progression. However, the biological functions and potential mechanisms of lncRNAs in colorectal cancer (CRC) are unclear. METHODS: The novel lncRNA POU6F2-AS1 was identified through bioinformatics analysis, and its expression in CRC patients was verified via qRT-PCR and FISH. In vitro and in vivo experiments, such as BODIPY staining, Oil Red O staining, triglyceride (TAG) assays, and liquid chromatography mass spectrometry (LC-MS) were subsequently performed with CRC specimens and cells to determine the clinical significance, and functional roles of POU6F2-AS1. Biotinylated RNA pull-down, RIP, Me-RIP, ChIP, and patient-derived organoid (PDO) culture assays were performed to confirm the underlying mechanism of POU6F2-AS1. RESULTS: The lncRNA POU6F2-AS1 is markedly upregulated in CRC and associated with adverse clinicopathological features and poor overall survival in CRC patients. Functionally, POU6F2-AS1 promotes the growth and lipogenesis of CRC cells both in vitro and in vivo. Mechanistically, METTL3-induced m(6)A modification is involved in the upregulation of POU6F2-AS1. Furthermore, upregulated POU6F2-AS1 could tether YBX1 to the FASN promoter to induce transcriptional activation, thus facilitating the growth and lipogenesis of CRC cells. CONCLUSIONS: Our data revealed that the upregulation of POU6F2-AS1 plays a critical role in CRC fatty acid metabolism and might provide a novel promising biomarker and therapeutic target for CRC.
ESTHER : Jiang_2024_Mol.Cancer_23_55
PubMedSearch : Jiang_2024_Mol.Cancer_23_55
PubMedID: 38491348

Title : Cytochrome P450 inhibitor\/inducer treatment patterns among patients in the United States with advanced ovarian cancer who were prescribed or were eligible for poly(adenosine diphosphate [ADP]-ribose) polymerase inhibitors in the first-line maintenance setting - Rimel_2024_Gynecol.Oncol.Rep_51_101332
Author(s) : Rimel BJ , Chase DM , Perhanidis J , Ghazarian AA , Du EX , Wang T , Song J , Golembesky AK , Hurteau JA , Kalilani L , Salani R , Monk BJ
Ref : Gynecologic Oncology Rep , 51 :101332 , 2024
Abstract : Poly(adenosine diphosphate [ADP]-ribose) polymerase inhibitors (PARPi) are metabolized either via carboxylesterase (niraparib) or cytochrome P450 (CYP) enzymes (olaparib and rucaparib). Patients with advanced epithelial ovarian cancer (aOC) who receive concomitant medication metabolized by the CYP system may be at risk of drug-drug interactions impacting PARPi efficacy and tolerability. This study investigated CYP inhibitor/inducer treatment patterns in the first-line maintenance (1Lm) setting for patients with aOC. This retrospective cohort study used de-identified databases of US patients with aOC. Eligible patients were aged <=18 years, diagnosed with aOC between January 2015-March 2021, and received CYP inhibitors/inducers during 1Lm PARPi initiation or the eligibility window (90 days before to 120 days after first-line platinum-based therapy ended [index]). Patients were either prescribed 1Lm PARPi monotherapy (PARPi cohort) or were not prescribed any 1Lm therapy within 120 days post-index (PARPi-eligible cohort). Strong/moderate CYP inhibitors/inducers were defined as area under the plasma concentration-time curve ratio (AUCR) <=2 or clearance ratio (CL) >=0.5 (inhibitors), and AUCR >=0.5 or CL ratio <=2 (inducers). Of 1411 patients (median age 63), 158 were prescribed PARPis and 1253 were PARPi-eligible. Among the PARPi cohort, 46.2%, 48.7%, and 5.1% were prescribed niraparib, olaparib, and rucaparib, respectively. For patients prescribed olaparib or rucaparib, 42.4% also received strong and/or moderate CYP inhibitors/inducers. This real-world study indicated a considerable proportion of patients received strong and/or moderate CYP inhibitors/inducers and were prescribed PARPis metabolized by the CYP system. Understanding potential impacts of concomitant CYP inhibitors/inducers on PARPi efficacy and safety is warranted.
ESTHER : Rimel_2024_Gynecol.Oncol.Rep_51_101332
PubMedSearch : Rimel_2024_Gynecol.Oncol.Rep_51_101332
PubMedID: 38362364

Title : Study on the Expression Significance of Mb, BChE and cTnI in Myocardial Infarction and Their Relationship with Prognosis - Lu_2023_Altern.Ther.Health.Med__
Author(s) : Lu J , Song J , Liu F , Chen B , Dong Y , Yang Y
Ref : Altern Ther Health Med , : , 2023
Abstract : OBJECTIVE: Circulating biomarkers can be used as effective prediction tools for AMI diagnosis and prognosis, but their prediction efficiency is limited and still needs to be explored. The study aimed to investigate the changes of myocardial troponin I (cTn I), myoglobin (Mb), and butyryl cholinesterase (BChE) levels in patients with acute myocardial infarction (AMI) and its clinical predictive efficacy. METHODS: In this prospective cohort study, fifty patients with AMI who received PCI (AMI group) and 50 healthy subjects who underwent physical examination (reference group) during the same period were included. According to the occurrence of short-term major adverse cardiovascular events (MACE) during 6-month follow-up, they were divided into MACE group and non-MACE group . The difference of Mb, BChE, and cTnI levels was compared, and the ROC curve was drawn to analyze the prediction efficiency. RESULTS: Compared with the reference group or non-MACE group, Mb and cTnI significantly increased and BChE significantly decreased inAMI group and MACE group, respectively (P < .05). The AUC of Mb, cTnI and BChE in diagnosing AMI occurrence and prognosis were all > 0.75, and the sensitivity and specificity were all > 85.00%. cTnI, Mb and BChE have good diagnostic efficacy in disease occurrence and prognosis evaluation of AMI patients. CONCLUSIONS: High expression of Mb and cTnI and low expression of BChE can increase the risk of AMI incidence and MACE occurrence and have high diagnostic efficacy, which can be used as sensitive factors in clinical AMI diagnosis and evaluation. Thess provided a theoretical foundation for AMI diagnosis and MACE preventing in AMI patients.
ESTHER : Lu_2023_Altern.Ther.Health.Med__
PubMedSearch : Lu_2023_Altern.Ther.Health.Med__
PubMedID: 37708555

Title : Hyperglycemia disrupted the integrity of the blood-brain barrier following diffuse axonal injury through the sEH\/NF-B pathway - Wei_2023_Immun.Inflamm.Dis_11_e1105
Author(s) : Wei X , Xing Z , Huang T , Zhang M , Song J , Zhao Y
Ref : Immun Inflamm Dis , 11 :e1105 , 2023
Abstract : OBJECTIVES: We aimed to investigate the role of soluble epoxide hydrolase for hyperglycemia induced-disruption of blood-brain barrier (BBB) integrity after diffuse axonal injury (DAI). METHODS: Rat DAI hyperglycemia model was established by a lateral head rotation device and intraperitoneal injection of 50% glucose. Glial fibrillary acidic protein, ionized calcium-binding adapter molecule-1, beta-amyloid precursor protein, neurofilament light chain, and neurofilament heavy chain was detected by immunohistochemistry. Cell apoptosis was examined by terminal deoxynucleotidyl transferase nick-end labeling (TUNEL) assay. The permeability of blood-brain barrier (BBB) was assessed by expression of tight junction proteins, leakage of Evans blue and brain water content. The soluble epoxide hydrolase (sEH) pathway was inhibited by 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU) and the nuclear transcription factor kappa B (NF-kappaB) pathway was inhibited by pyrrolidine dithiocarbamate and activated by phorbol-12-myristate-13-acetate in vivo and/or vitro, respectively. The inflammatory factors were detected by enzyme-linked immunosorbent assay. RESULTS: Hyperglycemia could exacerbate axonal injury, aggravate cell apoptosis and glial activation, worsen the loss of BBB integrity, increase the release of inflammatory factors, and upregulate the expression of sEH and NF-kappaB. Inhibition of sEH could reverse all these damages and protect BBB integrity by upregulating the expression of tight junction proteins and downregulating the levels of inflammatory factors in vivo and vitro, while the agonist of NF-kappaB pathway abrogated the protective effects of TPPU on BBB integrity in vitro. CONCLUSIONS: sEH was involved in mediating axonal injury induced by hyperglycemia after DAI by disrupting BBB integrity through inducing inflammation via the NF-kappaB pathway.
ESTHER : Wei_2023_Immun.Inflamm.Dis_11_e1105
PubMedSearch : Wei_2023_Immun.Inflamm.Dis_11_e1105
PubMedID: 38156378

Title : SERCA2 dysfunction triggers hypertension by interrupting mitochondrial homeostasis and provoking oxidative stress - Wang_2023_Free.Radic.Biol.Med_212_284
Author(s) : Wang Y , Wang M , Su H , Song J , Ren M , Hu P , Liu G , Tong X
Ref : Free Radic Biol Med , 212 :284 , 2023
Abstract : BACKGROUND AND AIM: Sarcoplasmic/endoplasmic reticulum Ca(2+) ATPase 2 (SERCA2) is critical in maintaining Ca(2+) homeostasis. The cysteine 674 (C674) is the key redox regulatory cysteine in regulating SERCA2 activity, which is irreversibly oxidized in the renal cortex of hypertensive mice. We have reported that the substitution of C674 by serine causes SERCA2 dysfunction and increases blood pressure by induction of endoplasmic reticulum stress (ERS). This study is to explore whether the dysfunction of SERCA2 causes hypertension by interrupting mitochondrial homeostasis and inducing oxidative stress. METHODS & RESULTS: We used heterozygous SERCA2 C674S gene mutation knock-in (SKI) mice, where one copy of C674 was substituted by serine to represent partial C674 oxidation. In renal proximal tubule (RPT) cells, the substitution of C674 by serine decreased mitochondrial Ca(2+) content, increased mitochondrial membrane potential, ATP content, and reactive oxygen species (ROS), which could be reversed by ERS inhibitor 4-phenylbutyric acid or SERCA2 agonist CDN1163. In SKI RPT cells, the redox modulator Tempol alleviated oxidative stress, downregulated the protein expression of ERS markers and soluble epoxide hydrolase, upregulated the protein expression of dopamine D1 receptor, and reduced Na(+)/K(+)- ATPase activity. In SKI mice, SERCA2 agonists CDN1163 and [6]-Gingerol, or the redox modulator Tempol increased urine output and lowered blood pressure. CONCLUSION: The irreversible oxidation of C674 is not only an indicator of increased ROS, but also further inducing oxidative stress to cause hypertension. Activation of SERCA2 or inhibition of oxidative stress is beneficial to alleviate hypertension caused by SERCA2 dysfunction.
ESTHER : Wang_2023_Free.Radic.Biol.Med_212_284
PubMedSearch : Wang_2023_Free.Radic.Biol.Med_212_284
PubMedID: 38163553

Title : Novel harmine derivatives as potent acetylcholinesterase and amyloid beta aggregation dual inhibitors for management of Alzheimer's disease - Du_2023_J.Enzyme.Inhib.Med.Chem_38_2281893
Author(s) : Du H , Song J , Ma F , Gao H , Zhao X , Mao R , He X , Yan Y
Ref : J Enzyme Inhib Med Chem , 38 :2281893 , 2023
Abstract : In this study, a series of potential ligands for the treatment of AD were synthesised and characterised as novel harmine derivatives modified at position 9 with benzyl piperazinyl. In vitro studies revealed that the majority of the derivatives exhibited moderate to potent inhibition against hAChE and Abeta(1-42) aggregation. Notably, compounds 13 and 17d displayed potent drug-likeness and ADMET properties, demonstrating remarkable inhibitory activities towards AChE (IC(50) = 58.76 nM and 89.38 nM, respectively) as well as Abeta aggregation (IC(50) = 9.31 microM and 13.82 microM, respectively). More importantly, compounds 13 and 17d showed exceptional neuroprotective effects against Abeta(1-42)-induced SH-SY5Y damage, while maintaining low toxicity in SH-SY5Y cells. Further exploration of the mechanism through kinetic studies and molecular modelling confirmed that compound 13 could interact with both the CAS and the PAS of AChE. These findings suggested that harmine derivatives hold great potential as dual-targeted candidates for treating AD.
ESTHER : Du_2023_J.Enzyme.Inhib.Med.Chem_38_2281893
PubMedSearch : Du_2023_J.Enzyme.Inhib.Med.Chem_38_2281893
PubMedID: 37965884

Title : Identification of the first selective bioluminescent probe for real-time monitoring of carboxylesterase 2 in vitro and in vivo - Chen_2023_Analyst__
Author(s) : Chen Z , Yu J , Sun K , Song J , Chen L , Jiang Y , Wang Z , Chen Y , Zhao T , Miao Z , Huang T , Chen M , Zhao Y , Hai A , Qi Q , Feng P , Li M , Ke B
Ref : Analyst , : , 2023
Abstract : Carboxylesterase (CES), a main hydrolysis enzyme family in the human body, plays a crucial role in drug metabolism. Among them, CES1 and CES2 are the primary subtypes, and each exhibits distinct distribution and functions. However, convenient and non-invasive methods for distinguishing them and the real-time monitoring of CES2 are relatively rare, hindering the further understanding of physiological functions and underlying mechanisms. In this study, we have designed, synthesized, and evaluated the first selective bioluminescent probe (CBP 1) for CES2 with high sensitivity, high specificity and rapid reactivity. This probe offers a promising approach for the real-time detection of CES2 and its dynamic fluctuations both in vitro and in vivo.
ESTHER : Chen_2023_Analyst__
PubMedSearch : Chen_2023_Analyst__
PubMedID: 36661088 || 38078792

Title : Effects of Methyl Jasmonate Fumigation on the Growth and Detoxification Ability of Spodoptera litura to Xanthotoxin - Chen_2023_Insects_14_
Author(s) : Chen L , Song J , Wang J , Ye M , Deng Q , Wu X , Ren B
Ref : Insects , 14 : , 2023
Abstract : Methyl jasmonate (MeJA) is a volatile substance derived from jasmonic acid (JA), and it responds to interbiotic and abiotic stresses by participating in interplant communication. Despite its function in interplant communication, the specific role of MeJA in insect defense responses is poorly understood. In this study, we found that carboxylesterase (CarE) activities, glutathione-S-transferase (GSTs) activities, and cytochrome mono-oxygenases (P450s) content increased more after the feeding of diets containing xanthotoxin, while larvae exposed to MeJA fumigation also showed higher enzyme activity in a dose-dependent manner: lower and medium concentrations of MeJA induced higher detoxification enzyme activities than higher concentrations of MeJA. Moreover, MeJA improved the growth of larvae fed on the control diet without toxins and diets with lower concentrations of xanthotoxin (0.05%); however, MeJA could not protect the larvae against higher concentrations of xanthotoxin (0.1%, 0.2%). In summary, we demonstrated that MeJA is effective at inducing S. litura defense response, but the enhanced detoxifying ability could not overcome the strong toxins.
ESTHER : Chen_2023_Insects_14_
PubMedSearch : Chen_2023_Insects_14_
PubMedID: 36835714

Title : TPPU Downregulates Oxidative Stress Damage and Induces BDNF Expression in PC-12 Cells - Wu_2022_Comput.Math.Methods.Med_2022_7083022
Author(s) : Wu Q , Lin M , Wu P , Zhao C , Yang S , Yu H , Xian W , Song J
Ref : Comput Math Methods Med , 2022 :7083022 , 2022
Abstract : OBJECTIVE: Ischemia-reperfusion is an ongoing clinical challenge that can lead to a series of pathological changes including oxidative stress. The inhibition of soluble epoxide hydrolase inhibitor (sEH) by 1-(1-propanoylpiperidin-4-yl)-3-[4-(trifluoromethoxy)phenyl]urea (TPPU) results in an anti-inflammatory, cardioprotective, and blood vessel growth-promoting effects. Therefore, this study focused on the protective effect of TPPU on a rat pheochromocytoma (PC-12) cell oxidative stress model induced by H(2)O(2). METHODS: CCK-8 and Hoechst 33342 were used to evaluate cell apoptosis and western blot to detect the apoptotic proteins and brain-derived neurotrophic factor (BDNF) expression. RESULT: The incubation with 100 microM, 50 microM, and 25 microM TPPU significantly increased PC-12 cell viability. Epoxyeicosatrienoic acid (EET) pretreatment also protected PC-12 cells from oxidative stress. In addition, TPPU reduced caspase-3 and Bax expression and induced Bcl-2 expression, and EETs exerted the same effect on caspase-3 expression as TPPU. A positive relationship was found between TPPU or EET incubation and BDNF expression. CONCLUSION: These results revealed that TPPU reduced PC-12 cell oxidative stress injury induced by H(2)O(2) and promoted BDNF expression.
ESTHER : Wu_2022_Comput.Math.Methods.Med_2022_7083022
PubMedSearch : Wu_2022_Comput.Math.Methods.Med_2022_7083022
PubMedID: 35872930

Title : Development and Validation of a Non-invasive Model to Predict Liver Histological Lesions in Chronic Hepatitis B Patients With Persistently Normal Alanine Aminotransferase and Detectable Viremia - Hu_2022_Front.Med.(Lausanne)_9_944547
Author(s) : Hu Q , Wang Q , Xu W , Huang C , Tao S , Qi X , Zhang Y , Li X , Jiang X , Song J , Li Q , Chen L , Huang Y
Ref : Front Med (Lausanne) , 9 :944547 , 2022
Abstract : BACKGROUND: A critical and controversial issue is whether antiviral therapy should be recommended in chronic hepatitis B virus (HBV) infection patients with persistently normal alanine aminotransferase (PNALT) and detectable HBV DNA. The study aimed to develop a non-invasive model for predicting significant liver histological changes (SLHC), which is the histological indication for antiviral therapy in chronic hepatitis B (CHB) patients with PNALT and detectable HBV DNA. METHODS: 398 chronic HBV infection patients with PNALT and detectable HBV DNA who underwent liver biopsy were divided into the estimation set (n = 256) and validation set (n = 142). A multivariate logistic regression model was developed to predict SLHC in the estimation set, and the diagnostic performance was further validated in the validation set. RESULTS: 132 patients (33.2%) with PNALT and detectable HBV DNA had SLHC. Aspartate aminotransferase (AST), cholinesterase (ChE), and liver stiffness measurement (LSM) were identified as the independent predictors of SLHC. The AUROC of the SLHC index, which combined AST, ChE, and LSM, was 0.824 and 0.816 in the estimation and validation set, respectively, for the prediction of SLHC. Applying the SLHC index >= 0.15, the presence of SLHC could be excluded with high negative predictive value in the estimation set (93.2%) and in the validation set (90.2%). Applying the SLHC index <= 0.55, the presence of SLHC could be considered with high positive predictive value in the estimation set (79.2%) and in the validation set (76.5%). CONCLUSION: The SLHC index provides a high accuracy in predicting liver histological indication for antiviral therapy in CHB patients with PNALT and detectable HBV DNA.
ESTHER : Hu_2022_Front.Med.(Lausanne)_9_944547
PubMedSearch : Hu_2022_Front.Med.(Lausanne)_9_944547
PubMedID: 35911415

Title : Characterization of a new chlorimuron-ethyl-degrading strain Cedecea sp. LAM2020 and biodegradation pathway revealed by multiomics analysis - Ma_2022_J.Hazard.Mater_443_130197
Author(s) : Ma Q , Han X , Song J , Wang J , Li Q , Parales RE , Li L , Ruan Z
Ref : J Hazard Mater , 443 :130197 , 2022
Abstract : The widespread use of the herbicide chlorimuron-methyl is hazard to rotational crops and causes soil degradation problems. Biodegradation is considered a promising way for removing herbicide residues from the environment. Here, a new isolated strain, Cedecea sp. LAM2020, enabled complete degradation of 100 mg/L chlorimuron-methyl within five days. Transcriptome analysis revealed that ABC transporters, atrazine degradation and purine metabolism were enriched in the KEGG pathway. Integrating GO and KEGG classification with related reports, we predict that carboxylesterases are involved in the biodegradation of chlorimuron-methyl by LAM2020. Heterologous expression of the carboxylesterase gene carH showed 26.67% degradation of 50 mg/L chlorimuron-methyl within 6 h. The intracellular potential biological response and extracellular degradation process of chlorimuron-ethyl were analyzed by the nontarget metabolomic and mass spectrometry respectively, and the biodegradation characteristics and complete mineralization pathway was revealed. The cleavage of the sulfonylurea bridge and the ester bond achieved the first step in the degradation of chlorimuron-methyl. Together, these results reveal the presence of acidolysis and enzymatic degradation of chlorimuron-methyl by strain LAM2020. Hydroponic corn experiment showed that the addition of strain LAM2020 alleviated the toxic effects of chlorimuron-ethyl on the plants. Collectively, strain LAM2020 may be a promising microbial agent for plants chlorimuron-ethyl detoxification and soil biofertilizer.
ESTHER : Ma_2022_J.Hazard.Mater_443_130197
PubMedSearch : Ma_2022_J.Hazard.Mater_443_130197
PubMedID: 36272371
Gene_locus related to this paper: 9entr-CarHBioH

Title : Dual-Modal Nanoscavenger for Detoxification of Organophosphorus Compounds - Zou_2022_ACS.Appl.Mater.Interfaces__
Author(s) : Zou S , Wang B , Wang Q , Liu G , Song J , Zhang F , Li J , Wang F , He Q , Zhu Y , Zhang L
Ref : ACS Appl Mater Interfaces , : , 2022
Abstract : Organophosphorus compounds (OPs) pose great military and civilian hazards. However, therapeutic and prophylactic antidotes against OP poisoning remain challenging. In this study, we first developed a novel nanoscavenger (rOPH/ZIF-8@E-Lipo) against methyl paraoxon (MP) poisoning using enzyme immobilization and erythrocyte-liposome hybrid membrane camouflage techniques. Then, we evaluated the physicochemical characterization, stability, and biocompatibility of the nanoscavengers. Afterward, we examined acetylcholinesterase (AChE) activity, cell viability, and intracellular reactive oxygen species (ROS) to indicate the protective effects of the nanoscavengers in vitro. Following the pharmacokinetic and biodistribution studies, we further evaluated the therapeutic and prophylactic detoxification efficacy of the nanoscavengers against MP in various poisoning settings. Finally, we explored the penetration capacity of the nanoscavengers across the blood-brain barrier (BBB). The present study validated the successful construction of a novel nanoscavenger with excellent stability and biocompatibility. In vitro, the resulting nanoscavenger exhibited a significant protection against MP-induced AChE inactivation, oxidative stress, and cytotoxicity. In vivo, apart from the positive therapeutic effects, the nanoscavengers also exerted significant prophylactic detoxification efficacy against single lethal MP exposure, repeated lethal MP challenges, and sublethal MP poisoning. These excellent detoxification effects of the nanoscavengers against OPs may originate from a dual-mode mechanism of inner recombinant organophosphorus hydrolase (rOPH) and outer erythrocyte membrane-anchored AChE. Finally, in vitro and in vivo studies jointly demonstrated that monosialoganglioside (GM1)-modified rOPH/ZIF-8@E-Lipo could penetrate the BBB with high efficiency. In conclusion, a stable and safe dual-modal nanoscavenger was developed with BBB penetration capability, providing a promising strategy for the treatment and prevention of OP poisoning.
ESTHER : Zou_2022_ACS.Appl.Mater.Interfaces__
PubMedSearch : Zou_2022_ACS.Appl.Mater.Interfaces__
PubMedID: 36089739

Title : Study on the toxic-mechanism of triclosan chronic exposure to zebrafish (Danio rerio) based on gut-brain axis - Wang_2022_Sci.Total.Environ__156936
Author(s) : Wang Y , Song J , Wang X , Qian Q , Wang H
Ref : Sci Total Environ , :156936 , 2022
Abstract : Triclosan (TCS), as a broad-spectrum bactericide, is extensively used in the fine chemical and textile industries. It is recognized as a new type of environmental endocrine disruptor with frequent detection and environmental pollution. However, the toxicity mechanism regarding neurodevelopment and neurobehavior remains unclear. This study is intended to explore the underlying toxic mechanism of TCS based on gut-brain axis. TCS-chronic exposure affected the development of zebrafish, induced feminization, obesity physical signs and abnormal organ index and caused neurobehavioral abnormalities by inhibiting both neurotransmitter acetylcholinesterase and dopamine activity, promoting brain neuron apoptosis and accelerating diencephalic lesions. Meanwhile, TCS-chronic exposure led to gut microbiota dysbiosis and decreased diversity, such as increased pathogenic bacteria and decreased probiotics in adult zebrafish gut, which caused many pathological damages, including partial shedding and ablation of intestinal villi, inflammatory infiltration, thinning of intestinal wall, and increased goblet cell in villus. Based on the communication between intestinal peripheral nerves and CNS, the above histopathological injuries and disorders were well underpinned and illustrated by the changes of biomarkers and the expression of related marker genes in the gut-brain axis. Additionally, short-chain fatty acids (SCFA), as the regulators of intestinal sympathetic nerve activation, are also secreting products of intestinal microflora and play a crucial role in regulating the balance of intestinal flora and protecting intestinal homeostasis. SCFA in low doses can effectively alleviate and rescue the toxic effects under TCS exposure, which evidenced that TCS exerted systemic toxic effects on the gut-brain axis by influencing the composition and diversity of gut flora in zebrafish, and fully demonstrated the interaction effect between intestine and brain. Hence, these findings contribute to the understanding, prevention, and diagnosis of endocrine disrupting diseases caused by environmental pollutants from the perspective of the gut-brain axis, and strengthening the early warning, management and control of TCS pollution.
ESTHER : Wang_2022_Sci.Total.Environ__156936
PubMedSearch : Wang_2022_Sci.Total.Environ__156936
PubMedID: 35772538

Title : Translocation of Specific DNA Nanocarrier through an Ultrasmall Nanopipette: Toward Single-Protein-Molecule Detection with Superior Signal-to-Noise Ratio - Zhang_2022_ACS.Nano__
Author(s) : Zhang X , Luo D , Zheng YW , Li XQ , Song J , Zhao WW , Chen HY , Xu JJ
Ref : ACS Nano , : , 2022
Abstract : The use of functional DNA nanostructures as carriers to ship proteins through solid-state nanopores has recently seen substantial growth in single-protein-molecule detection (SPMD), driven by the potential of this methodology and implementations that it may enable. Ultrasmall nanopores have exhibited obvious advantages in spatiotemporal biological detection due to the appropriate nanoconfined spaces and unique properties. Herein, a 6.8 nm DNA tetrahedron (TDN) with a target-specific DNA aptamer (TDN-apt) was engineered to carry the representative target of acetylcholinesterase (AChE) through an ultrasmall nanopipet with a 30 nm orifice, underpinning the advanced SPMD of AChE with good performance in terms of high selectivity, low detection limit (0.1 fM), and especially superior signal-to-noise ratio (SNR). The kinetic interaction between TDN-apt and AChE was studied and the practical applicability of the as-developed SPMD toward real samples was validated using serum samples from patients with Alzheimer's disease. This work not only presented a feasible SPMD solution toward low-abundance proteins in complex samples and but also was envisioned to inspire more interest in the design and implementation of synergized DNA nanostructure-ultrasmall nanopore systems for future SPMD development.
ESTHER : Zhang_2022_ACS.Nano__
PubMedSearch : Zhang_2022_ACS.Nano__
PubMedID: 36047811

Title : Presence of L1014F Knockdown-Resistance Mutation in Anopheles gambiae s.s. From So Tom and Prncipe - Zhang_2021_Front.Cell.Infect.Microbiol_11_633905
Author(s) : Zhang H , Li M , Tan R , Deng C , Huang B , Wu Z , Zheng S , Guo W , Tuo F , Yuan Y , Bandeira CA , Rompao DH , Xu Q , Song J , Wang Q
Ref : Front Cell Infect Microbiol , 11 :633905 , 2021
Abstract : Malaria, one of the most serious parasitic diseases, kills thousands of people every year, especially in Africa. Sao Tome and Prncipe are known to have stable transmission of malaria. Indoor residual spraying (IRS) of insecticides and long-lasting insecticidal nets (LLIN) are considered as an effective malaria control interventions in these places. The resistance status of Anopheles gambiae s.s. from Agua Grande, Caue, and Lemba of Sao Tome and Prncipe to insecticides, such as dichlorodiphenyltrichloroethane (DDT) (4.0%), deltamethrin (0.05%), permethrin (0.75%), fenitrothion (1.0%), and malathion (5.0%), were tested according to the WHO standard protocol. DNA extraction, species identification, as well as kdr and ace-1(R) genotyping were done with the surviving and dead mosquitoes post testing. They showed resistance to cypermethrin with mortality rates ranging from 89.06% to 89.66%. Mosquitoes collected from Agua Grande, Caue, and Lemba displayed resistance to DDT and fenitrothion with mortality rates higher than 90%. No other species were detected in these study localities other than Anopheles gambiae s.s. The frequency of L1014F was high in the three investigated sites, which was detected for the first time in Sao Tome and Prncipe. No ace(-1R) mutation was detected in all investigated sites. The high frequency of L1014F showed that kdr L1014F mutation might be related to insecticide resistance to Anopheles gambiae s.s. populations from Sao Tome and Prncipe. Insecticide resistance status is alarming and, therefore, future malaria vector management should be seriously considered by the government of Sao Tome and Prncipe.
ESTHER : Zhang_2021_Front.Cell.Infect.Microbiol_11_633905
PubMedSearch : Zhang_2021_Front.Cell.Infect.Microbiol_11_633905
PubMedID: 34307185

Title : Characterization of enzymatically interesterified palm oil-based fats and its potential application as cocoa butter substitute - Zhang_2020_Food.Chem_318_126518
Author(s) : Zhang Z , Song J , Lee WJ , Xie X , Wang Y
Ref : Food Chem , 318 :126518 , 2020
Abstract : Cocoa butter substitutes (CBS) used for chocolate preparation was produced using a mixture of palm kernel oil (PKO) and enzymatically interesterified fats. The interesterified fats consisted of palm olein (POL), fully hydrogenated palm oil (FHPO) and PKO that were catalyzed using Lipozyme TL IM at 65 degreeC in a solvent-free packed bed reactor. An interesterification degree of 97.10% was obtained using feed flow rate of 70 mL/min and the interesterified fats showed steep solid fat content (SFC) curve characteristics with low SFC at high temperature. In the binary system, PKO and the interesterified fats showed good compatibility at 5-10 degreeC, while eutectic effects were observed at 15-35 degreeC. CBS produced from PKO and the interesterified fats in a mass ratio of 4:6 (CBS-46) and 3:7 (CBS-37) had crystals formed prominently in the beta' form. Without the need of a tempering process, chocolate made using CBS-46 as the base oil exhibited the desired properties in terms of hardness and fracturability.
ESTHER : Zhang_2020_Food.Chem_318_126518
PubMedSearch : Zhang_2020_Food.Chem_318_126518
PubMedID: 32151925

Title : Insight into the Functional Diversification of Lipases in the Endoparasitoid Pteromalus puparum (Hymenoptera: Pteromalidae) by Genome-scale Annotation and Expression Analysis - Wang_2020_Insects_11_
Author(s) : Wang J , Song J , Fang Q , Yao H , Wang F , Song Q , Ye G
Ref : Insects , 11 : , 2020
Abstract : Lipases play essential roles in digestion, transport, and processing of dietary lipids in insects. For parasitoid wasps with a unique life cycle, lipase functions could be multitudinous in particular. Pteromalus puparum is a pupal endoparasitoid of butterflies. The female adult deposits eggs into its host, along with multifunctional venom, and the developing larvae consume host as its main nutrition source. Parasitoid lipases are known to participate in the food digestion process, but the mechanism remains unclear. P. puparum genome and transcriptome data were interrogated. Multiple alignments and phylogenetic trees were constructed. We annotated a total of 64 predicted lipase genes belonging to five lipase families and suggested that eight venom and four salivary lipases could determine host nutrition environment post-parasitization. Many putative venom lipases were found with incomplete catalytic triads, relatively long beta9 loops, and short lids. Data analysis reveals the loss of catalytic activities and weak triacylglycerol (TAG) hydrolytic activities of lipases in venom. Phylogenetic trees indicate various predicted functions of lipases in P. puparum. Our information enriches the database of parasitoid lipases and the knowledge of their functional diversification, providing novel insight into how parasitoid wasps manipulate host lipid storage by using venom lipases.
ESTHER : Wang_2020_Insects_11_
PubMedSearch : Wang_2020_Insects_11_
PubMedID: 32260574

Title : Correlation analysis between CARMEN variants and alcohol-induced osteonecrosis of the femoral head in the Chinese population - Guo_2020_BMC.Musculoskelet.Disord_21_547
Author(s) : Guo Y , Cao Y , Gong S , Zhang S , Hou F , Zhang X , Hu J , Yang Z , Yi J , Luo D , Chen X , Song J
Ref : BMC Musculoskelet Disord , 21 :547 , 2020
Abstract : BACKGROUND: Osteonecrosis of the femoral head (ONFH) is a complicated disease associated with trauma, hormone abuse and excessive alcohol consumption. Polymorphisms of long non-coding RNAs have been also linked with the development of ONFH. Our research aimed to explore the relationship between CARMEN (Cardiac Mesoderm Enhancer-Associated Non-Coding RNA) variants and ONFH risk. METHODS: Our study used Agena MassARRAY Assay to genotype 6 selected single nucleotide polymorphisms (SNPs) in 731 participants (308 alcohol-induced ONFH patients and 423 controls). We used odds ratios (ORs) and 95% confidence intervals (CIs) to calculate the effect of gene polymorphisms on the occurrence of alcohol-induced ONFH by logistic regression analysis and haplotype analysis. RESULTS: Our overall analysis illustrated that rs13177623 and rs12654195 had an association with a reduced risk of ONFH after adjustment for age and gender. We also found that rs13177623, rs12654195 and rs11168100 were associated with a decreased susceptibility to alcohol-induced ONFH in people <=45 years. In addition, the necrotic sites stratification analysis showed that rs12654195 was only found to be related to alcohol-induced ONFH risk in the recessive model. In patients with different clinical stages, rs353300 was observed to be associated with a higher incidence of ONFH. Individuals with different genotypes of rs13177623, rs12654195 and rs11168100 had significantly different clinical parameters (cholinesterase, globulin, percentage of neutrophils and the absolute value of lymphocytes). CONCLUSIONS: Our data provided new light on the association between CARMEN polymorphisms and alcohol-induced ONFH risk in the Chinese Han population.
ESTHER : Guo_2020_BMC.Musculoskelet.Disord_21_547
PubMedSearch : Guo_2020_BMC.Musculoskelet.Disord_21_547
PubMedID: 32799824

Title : Pharmacokinetics, excretion and metabolites analysis of DL0410, a dualacting cholinesterase inhibitor and histamine3 receptor antagonist - Pang_2019_Mol.Med.Rep_20_1103
Author(s) : Pang X , Zhao Y , Song J , Kang , Wu S , Wang L , Liu A , Du G
Ref : Mol Med Rep , 20 :1103 , 2019
Abstract : DL0410, a dualaction cholinesterase inhibitor and histamine3 receptor antagonist with a novel structural scaffold, may be a potential candidate for the treatment of Alzheimer's disease (AD). To the best of the authors' knowledge, this is the first study to demonstrate a reliable method for the measurement of DL0410 in rat plasma, brain, bile, urine and feces samples, and identification of its primary metabolites. The pharmacokinetic properties of DL0410 were analyzed by liquid chromatographymass spectrometry at oral doses of 25, 50 and 100 mg/kg and intravenous dose of 5 mg/kg. The investigation of the excretion and metabolism of DL0410 was determined following liquidliquid extraction for biliary, urinary and fecal samples. Finally, the cytochrome (CY)P450 isoforms involved in the production of DL0410 metabolites with recombinant human cytochrome P450 enzymes were characterized. The results suggested that DL0410 was not well absorbed; however, was distributed to the entorhinal cortex and hippocampus of the brain. A total of two common metabolites of the reduction of DL0140 in the bile, urine and feces were identified and CYP2D6 was involved in this reaction. The pharmacokinetic results of DL0410 provided information for the illustration of its pharmacodynamic properties, mechanism of action and promoted its continued evaluation as a therapeutic agent for AD treatment.
ESTHER : Pang_2019_Mol.Med.Rep_20_1103
PubMedSearch : Pang_2019_Mol.Med.Rep_20_1103
PubMedID: 31173186

Title : A novel ABHD12 nonsense variant in Usher syndrome type 3 family with genotype-phenotype spectrum review - Li_2019_Gene_704_113
Author(s) : Li T , Feng Y , Liu Y , He C , Liu J , Chen H , Deng Y , Li M , Li W , Song J , Niu Z , Sang S , Wen J , Men M , Chen X , Li J , Liu X , Ling J
Ref : Gene , 704 :113 , 2019
Abstract : Usher syndrome (USH) is a clinically common autosomal recessive disorder characterized by retinitis pigmentosa (RP) and sensorineural hearing loss with or without vestibular dysfunction. In this study, we identified a Hunan family of Chinese descent with two affected members clinically diagnosed with Usher syndrome type 3 (USH3) displaying hearing, visual acuity, and olfactory decline. Whole-exome sequencing (WES) identified a nonsense variant in ABHD12 gene that was confirmed to be segregated in this family by Sanger sequencing and exhibited a recessive inheritance pattern. In this family, two patients carried homozygous variant in the ABHD12 (NM_015600: c.249C>G). Mutation of ABHD12, an enzyme that hydrolyzes an endocannabinoid lipid transmitter, caused incomplete PHARC syndrome, as demonstrated in previous reports. Therefore, we also conducted a summary based on variants in ABHD12 in PHARC patients, and in PHARC patients showing that there was no obvious correlation between the genotype and phenotype. We believe that this should be considered during the differential diagnosis of USH. Our findings predicted the potential function of this gene in the development of hearing and vision loss, particularly with regard to impaired signal transmission, and identified a novel nonsense variant to expand the variant spectrum in ABHD12.
ESTHER : Li_2019_Gene_704_113
PubMedSearch : Li_2019_Gene_704_113
PubMedID: 30974196
Gene_locus related to this paper: human-ABHD12

Title : A robust and economical pulse-chase protocol to measure the turnover of HaloTag fusion proteins - Merrill_2019_J.Biol.Chem_294_16164
Author(s) : Merrill RA , Song J , Kephart RA , Klomp AJ , Noack CE , Strack S
Ref : Journal of Biological Chemistry , 294 :16164 , 2019
Abstract : The self-labeling protein HaloTag has been used extensively to determine the localization and turnover of proteins of interest at the single-cell level. To this end, halogen-substituted alkanes attached to diverse fluorophores are commercially available that allow specific, irreversible labeling of HaloTag fusion proteins; however, measurement of protein of interest half-life by pulse-chase of HaloTag ligands is not widely employed because residual unbound ligand continues to label newly synthesized HaloTag fusions even after extensive washing. Excess unlabeled HaloTag ligand can be used as a blocker of undesired labeling, but this is not economical. In this study, we screened several inexpensive, low-molecular-weight haloalkanes as blocking agents in pulse-chase labeling experiments with the cell-permeable tetramethylrhodamine HaloTag ligand. We identified 7-bromoheptanol as a high-affinity, low-toxicity HaloTag-blocking agent that permits protein turnover measurements at both the cell population (by blotting) and single-cell (by imaging) levels. We show that the HaloTag pulse-chase approach is a nontoxic alternative to inhibition of protein synthesis with cycloheximide and extend protein turnover assays to long-lived proteins.
ESTHER : Merrill_2019_J.Biol.Chem_294_16164
PubMedSearch : Merrill_2019_J.Biol.Chem_294_16164
PubMedID: 31511325

Title : TPPU, a sEH Inhibitor, Attenuates Corticosterone-Induced PC12 Cell Injury by Modulation of BDNF-TrkB Pathway - Wu_2019_J.Mol.Neurosci_67_364
Author(s) : Wu Q , Song J , Meng D , Chang Q
Ref : Journal of Molecular Neuroscience , 67 :364 , 2019
Abstract : High level of corticosterone (CORT) is toxic to neurons and plays an important role in depression-like behavior and chronic stress. Our previous study showed that TPPU, a soluble epoxide hydrolase (sEH) inhibitor (sEHI), induces an antidepressant effect in animal models. However, the underlying mechanism is not clear. In this study, we investigated the protective effect of TPPU on PC12 cells against CORT-induced cytotoxicity and its underlying mechanism. We found that TPPU and the sEH substrate epoxyeicosatrienoic acids (EETs) protected PC12 cells from the CORT-induced injury by increasing cell viability and inhibiting apoptosis. Furthermore, TPPU and EETs also blocked the CORT-mediated downregulation of BDNF. Blocking the BDNF-TrkB pathway by the TrkB inhibitor K252a abolished the protective effect of TPPU. Taken together, our results suggest that sEHI could protect PC12 cells against the CORT-induced cytotoxicity via the BDNF-TrkB signaling pathway.
ESTHER : Wu_2019_J.Mol.Neurosci_67_364
PubMedSearch : Wu_2019_J.Mol.Neurosci_67_364
PubMedID: 30644034

Title : Diagnostic value of complete blood count in paraquat and organophosphorus poisoning patients - Tang_2018_Toxicol.Ind.Health__748233718770896
Author(s) : Tang Y , Hu L , Hong G , Zhong D , Song J , Zhao G , Lu Z
Ref : Toxicol Ind Health , :748233718770896 , 2018
Abstract : Complete blood count (CBC) is one of the most extensively used tests in clinical practice. In order to determine the diagnostic value of the CBC in paraquat (PQ) and organophosphorus (OPPs) poisoning, the CBC indices of PQ- and OPPs-poisoned patients were investigated in this study. A total of 96 PQ poisoning patients, 90 OPPs poisoning patients, and 188 healthy subjects were included in this study. The PQ- and OPPs-poisoned patients were divided into different groups according to their clinical symptoms. All CBC indices were analyzed by Fisher discriminant, partial least-squares discriminant analysis (PLS-DA), variance analysis, and receiver operating characteristic (ROC). The discriminant results showed that 87.7% of original grouped cases correctly classified between PQ-poisoned patients, OPPs-poisoned patients, and healthy subjects. The PLS-DA results showed that the important variable order was different in PQ- and OPPs-poisoned patients. Both white blood cell (WBC) and neutrophil (NE) counts were the most important indexes in PQ- and OPPs-poisoned patients. In OPPs poisoning patients, WBC and NE showed statistical differences between the severe poisoning group and the moderate poisoning group. Their areas under the ROC curve (AUC) were 0.673 (WBC) and 0.669 (NE), which were higher than cholinesterase (CHE; AUC 0.326). In conclusion, the CBC indices had a diagnostic value in PQ and OPPs poisoning; WBC and NE were the first responses and had clinical significance in PQ and OPPs poisoning; moreover, they are better than CHE in diagnosing OPPs poisoning.
ESTHER : Tang_2018_Toxicol.Ind.Health__748233718770896
PubMedSearch : Tang_2018_Toxicol.Ind.Health__748233718770896
PubMedID: 29669481

Title : Di-branched triphenylamine dye sensitized TiO2 nanocomposites with good photo-stability for sensitive photoelectrochemical detection of organophosphate pesticides - Song_2018_Anal.Chim.Acta_1001_24
Author(s) : Song J , Wu S , Xing P , Zhao Y , Yuan J
Ref : Anal Chim Acta , 1001 :24 , 2018
Abstract : Herein, a di-branched di-anchoring dye, T(TA)2, with triphenylamine as electron donor, thiophene as electron transfer pi-bridge, and acrylic acid as both acceptor and anchoring groups, was synthesized and coupled with TiO2 nanoparticles for the highly sensitive photoelectrochemical (PEC) assay of organophosphate pesticides (OPs). The T(TA)2 exhibited good anchoring stability to TiO2 nanoparticles in neutral buffer solutions. Under 2h continual irradiation, the T(TA)2-TiO2 nanocomposites respectively kept 99.7% and 85.9% of their initial photocurrents in neutral Tris-HCl and phosphate buffer solutions. Neither degradation nor desorption of T(TA)2 from TiO2 nanoparticles was observed during the continual irradiation in the Tris-HCl solutions. The stability was not only superior to its analogues either possessing one branch, with cyanoacrylic acid as anchoring groups, or without thiophene in the pi-bridge, but also better than the Ru(II) complex N719 and the porphyrin dye sensitized TiO2 nanocomposites. The nanocomposites also showed highly photocatalytic ability towards the oxidation of ascorbic acid and thiocholine (TCh). Since the latter is the enzymatic hydrolysis product of acetylcholinesterase (AChE) and the activity of AChE can be inhibited by OPs, the T(TA)2-TiO2/FTO was further used for PEC assay of OPs. Using parathion as a model analyte, the PEC method showed a wide linear range from 2x10(-12)-4x10(-6)gmL(-1) and an extremely low limit of detection of 5.6x10(-13)gmL(-1). Regarding these good analytical performances, this study may provide some guidance and pave the way for the applications of dye-TiO2 nanocomposites in a lot of PEC devices required to be performed in aqueous solutions.
ESTHER : Song_2018_Anal.Chim.Acta_1001_24
PubMedSearch : Song_2018_Anal.Chim.Acta_1001_24
PubMedID: 29291803

Title : Activation of GSK-3 disrupts cholinergic homoeostasis in nucleus basalis of Meynert and frontal cortex of rats - Wang_2017_J.Cell.Mol.Med_21_3515
Author(s) : Wang Y , Tian Q , Liu EJ , Zhao L , Song J , Liu XA , Ren QG , Jiang X , Zeng J , Yang YT , Wang JZ
Ref : J Cell Mol Med , 21 :3515 , 2017
Abstract : The cholinergic impairment is an early marker in Alzheimer's disease (AD), while the mechanisms are not fully understood. We investigated here the effects of glycogen synthase kinse-3 (GSK-3) activation on the cholinergic homoeostasis in nucleus basalis of Meynert (NBM) and frontal cortex, the cholinergic enriched regions. We activated GSK-3 by lateral ventricular infusion of wortmannin (WT) and GF-109203X (GFX), the inhibitors of phosphoinositol-3 kinase (PI3-K) and protein kinase C (PKC), respectively, and significantly decreased the acetylcholine (ACh) level via inhibiting choline acetyl transferase (ChAT) rather than regulating acetylcholinesterase (AChE). Neuronal axonal transport was disrupted and ChAT accumulation occurred in NBM and frontal cortex accompanied with hyperphosphorylation of tau and neurofilaments. Moreover, ChAT expression decreased in NBM attributing to cleavage of nuclear factor-kappaB/p100 into p52 for translocation into nucleus to lower ChAT mRNA level. The cholinergic dysfunction could be mimicked by overexpression of GSK-3 and rescued by simultaneous administration of LiCl or SB216763, inhibitors of GSK-3. Our data reveal the molecular mechanism that may underlie the cholinergic impairments in AD patients.
ESTHER : Wang_2017_J.Cell.Mol.Med_21_3515
PubMedSearch : Wang_2017_J.Cell.Mol.Med_21_3515
PubMedID: 28656644

Title : Does time difference of the acetylcholinesterase (AChE) inhibition in different tissues exist? A case study of zebra fish (Danio rerio) exposed to cadmium chloride and deltamethrin - Zhang_2017_Chemosphere_168_908
Author(s) : Zhang T , Yang M , Pan H , Li S , Ren B , Ren Z , Xing N , Qi L , Ren Q , Xu S , Song J , Ma J
Ref : Chemosphere , 168 :908 , 2017
Abstract : In order to illustrate time difference in toxic effects of cadmium chloride (CdCl2) and deltamethrin (DM), AChE activities were measured in different tissues, liver, muscle, brain, and gill, of Zebra fish (Danio rerio) across different concentrations in this research. The average AChE activity decreased comparing to 0.0 TU with DM (82.81% in 0.1 TU, 56.14% in 1.0 TU and 44.68% in 2.0 TU) and with CdCl2 (74.68% in 0.1 TU, 52.05% in 1.0 TU and 50.14% in 2.0 TU) showed an overall decrease with the increase of exposure concentrations. According to Self-Organizing Map (SOM), the AChE activities were characterized in relation with experimental conditions, showing an inverse relationship with exposure time. As the exposure time was longer, the AChE activities were correspondingly lower. The AChE inhibition showed time delay in sublethal treatments (0.1 TU) in different tissues: the AChE was first inhibited in brain by chemicals followed by gill, muscle and liver (brain > gill > muscle > liver). The AChE activity was almost inhibited synchronously in higher environmental stress (1.0 TU and 2.0 TU). As the AChE inhibition can induce abnormal of behavior movement, these results will be helpful to the mechanism of stepwise behavior responses according to the time difference in different tissues rather than the whole body AChE activity.
ESTHER : Zhang_2017_Chemosphere_168_908
PubMedSearch : Zhang_2017_Chemosphere_168_908
PubMedID: 27825714

Title : Structural and Experimental Evidence for the Enantiomeric Recognition toward a Bulky sec-Alcohol by Candida antarctica Lipase B - Park_2016_ACS.Catal_6_7458
Author(s) : Park K , Kim S , Park J , Joe S , Min B , Oh J , Song J , Park SY , Park S , Lee H
Ref : , 6 :7458 , 2016
Abstract : Candida antarctica lipase B (CAL-B) exhibits remarkable enantioselectivity for various chiral sec-alcohols, and the enantioselectivity is structurally well-understood. Two substituents at the chiral center of a sec-alcohol separately bind two pockets, namely, large and medium binding pockets. It has been believed that the medium pocket is too small to accommodate a large substituent (larger than an ethyl group), and thus, bulky sec-alcohols bearing two large substituents have been regarded as a poor substrate for CAL-B. However, we found that CAL-B can catalyze the transesterification of N-Boc-protected rac-2-amino-1-phenylethanol (1a) enantioselectively with a moderate reaction rate. X-ray crystallography and computer modeling revealed that the rotation of the Leu278 side chain creates a space to accept the N-Boc-aminomethylene group of 1a. Moreover, a sec-alcohol substrate with less than one hydrogen atom at the gamma-position from the hydroxyl group is required to achieve a moderate reaction rate. On the basis of this observation, we diversified bulky N-Boc-protected rac-2-amino-1-arylethanols for the transesterifications with high enantioselectivities (E > 200).
ESTHER : Park_2016_ACS.Catal_6_7458
PubMedSearch : Park_2016_ACS.Catal_6_7458
PubMedID:
Gene_locus related to this paper: canar-LipB

Title : Motor neurons control locomotor circuit function retrogradely via gap junctions - Song_2016_Nature_529_399
Author(s) : Song J , Ampatzis K , Bjornfors ER , El Manira A
Ref : Nature , 529 :399 , 2016
Abstract : Motor neurons are the final stage of neural processing for the execution of motor behaviours. Traditionally, motor neurons have been viewed as the 'final common pathway', serving as passive recipients merely conveying to the muscles the final motor program generated by upstream interneuron circuits. Here we reveal an unforeseen role of motor neurons in controlling the locomotor circuit function via gap junctions in zebrafish. These gap junctions mediate a retrograde analogue propagation of voltage fluctuations from motor neurons to control the synaptic release and recruitment of the upstream V2a interneurons that drive locomotion. Selective inhibition of motor neurons during ongoing locomotion de-recruits V2a interneurons and strongly influences locomotor circuit function. Rather than acting as separate units, gap junctions unite motor neurons and V2a interneurons into functional ensembles endowed with a retrograde analogue computation essential for locomotor rhythm generation. These results show that motor neurons are not a passive recipient of motor commands but an integral component of the neural circuits responsible for motor behaviour.
ESTHER : Song_2016_Nature_529_399
PubMedSearch : Song_2016_Nature_529_399
PubMedID: 26760208

Title : Arctigenin Confers Neuroprotection Against Mechanical Trauma Injury in Human Neuroblastoma SH-SY5Y Cells by Regulating miRNA-16 and miRNA-199a Expression to Alleviate Inflammation - Song_2016_J.Mol.Neurosci_60_115
Author(s) : Song J , Li N , Xia Y , Gao Z , Zou SF , Yan YH , Li SH , Wang Y , Meng YK , Yang JX , Kang TG
Ref : Journal of Molecular Neuroscience , 60 :115 , 2016
Abstract : Mechanical trauma injury is a severe insult to neural cells. Subsequent secondary injury involves the release of inflammatory factors that have dramatic consequences for undamaged cells, leading to normal cell death after the initial injury. The present study investigated the capacity for arctigenin (ARC) to prevent secondary effects and evaluated the mechanism underlying the action of microRNA (miRNA)-199a and miRNA-16 in a mechanical trauma injury (MTI) model using SH-SY5Y cells in vitro. SH-SY5Y cells are often applied to in vitro models of neuronal function and differentiation. Recently, miRNAs have been demonstrated to play a crucial role in NF-kappaB and cholinergic signaling, which can regulate inflammation. The cell model was established by scratch-induced injury of human SH-SY5Y cells, which mimics the characteristics of MTI. A cell counting kit-8 (CCK-8), terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL), and immunocytochemistry were used to measure cell viability. Enzyme-linked immunosorbent assay (ELISA) was used to evaluate the inflammatory cytokine and cholinesterase (CHE) content. The lactate dehydrogenase (LDH) content was measured to assess the degree of cell injury. The mRNA levels were measured by RT-PCR to analyze ARC's mechanism of action. miRNA inhibitors and mimics were used to inhibit and strengthen the expression of miRNAs. Protein expression was detected by western blotting analysis. ARC treatment reduced the TNF-alpha and IL-6 levels as well as the number of TUNEL+ apoptotic SH-SY5Y cells surrounding the scratch and increased the IL-10 level compared to the controls. ARC attenuated the increase of the cell damage degree and LDH content induced by scratching, indicating increased cell survival. Mechanistic studies showed that ARC upregulated the miRNA-16 and miRNA-199a levels to reduce upstream protein (IKKalpha and IKKbeta) expression and inhibit NF-kappaB signaling pathway activity; moreover, the increased miRNA-199a suppresses cholinesterases to increase cholinergic signaling, resulting in decreased expression of proinflammatory cytokines. ARC treatment confers protection for SH-SY5Y cells through positive regulation of miRNA expression, thereby reducing the inflammatory response. In turn, these effects accelerate injury repair in the scratch-induced injury model. These results might provide insights into the pharmacological role of ARC in anti-inflammation and neuroprotection in neural cells.
ESTHER : Song_2016_J.Mol.Neurosci_60_115
PubMedSearch : Song_2016_J.Mol.Neurosci_60_115
PubMedID: 27389368

Title : A Hardwired Circuit Supplemented with Endocannabinoids Encodes Behavioral Choice in Zebrafish - Song_2015_Curr.Biol_25_2610
Author(s) : Song J , Ampatzis K , Ausborn J , El Manira A
Ref : Current Biology , 25 :2610 , 2015
Abstract : Animals constantly make behavioral choices to facilitate moving efficiently through their environment. When faced with a threat, animals make decisions in the midst of other ongoing behaviors through a context-dependent integration of sensory stimuli. In vertebrates, the mechanisms underlying behavioral selection are poorly understood. Here, we show that ongoing swimming in zebrafish is suppressed by escape. The selection of escape over swimming is mediated by switching between two distinct motoneuron pools. A hardwired circuit mediates this switch by acting as a clutch-like mechanism to disengage the swimming motoneuron pool and engage the escape motoneuron pool. Threshold for escape initiation is lowered and swimming suppression is prolonged by endocannabinoid neuromodulation. Thus, our results reveal a novel cellular mechanism involving a hardwired circuit supplemented with endocannabinoids acting as a clutch-like mechanism to engage/disengage distinct motor pools to ensure behavioral selection and a smooth execution of motor action sequences in a vertebrate system.
ESTHER : Song_2015_Curr.Biol_25_2610
PubMedSearch : Song_2015_Curr.Biol_25_2610
PubMedID: 26412127

Title : Separate microcircuit modules of distinct v2a interneurons and motoneurons control the speed of locomotion - Ampatzis_2014_Neuron_83_934
Author(s) : Ampatzis K , Song J , Ausborn J , El Manira A
Ref : Neuron , 83 :934 , 2014
Abstract : Spinal circuits generate locomotion with variable speed as circumstances demand. These circuits have been assumed to convey equal and uniform excitation to all motoneurons whose input resistance dictates their activation sequence. However, the precise connectivity pattern between excitatory premotor circuits and the different motoneuron types has remained unclear. Here, we generate a connectivity map in adult zebrafish between the V2a excitatory interneurons and slow, intermediate, and fast motoneurons. We show that the locomotor network does not consist of a uniform circuit as previously assumed. Instead, it can be deconstructed into three separate microcircuit modules with distinct V2a interneuron subclasses driving slow, intermediate, or fast motoneurons. This modular design enables the increase of locomotor speed by sequentially adding microcircuit layers from slow to intermediate and fast. Thus, this principle of organization of vertebrate spinal circuits represents an intrinsic mechanism to increase the locomotor speed by incrementally engaging different motor units.
ESTHER : Ampatzis_2014_Neuron_83_934
PubMedSearch : Ampatzis_2014_Neuron_83_934
PubMedID: 25123308

Title : Pseudomonas aeruginosa quorum-sensing molecule N-(3-oxododecanoyl) homoserine lactone attenuates lipopolysaccharide-induced inflammation by activating the unfolded protein response - Zhang_2014_Biomed.Rep_2_233
Author(s) : Zhang J , Gong F , Li L , Zhao M , Song J
Ref : Biomed Rep , 2 :233 , 2014
Abstract : N-3-oxododecanoyl homoserine lactone (3-oxo-C12-HSL), a quorum-sensing signal molecule produced by Pseudomonas aeruginosa (P. aeruginosa), is involved in the expression of bacterial virulence factors and in the modulation of host immune responses by directly disrupting nuclear factor-kappaB (NF-kappaB) signaling and inducing cell apoptosis. The unfolded protein response (UPR) triggered by endoplasmic reticulum (ER) stress may suppress inflammatory responses in the later phase by blocking NF-kappaB activation. It was recently demonstrated that 3-oxo-C12-HSL may induce UPR in human aortic endothelial cells (HAECs). Therefore, 3-oxo-C12-HSL may also inhibit NF-kappaB activation and suppress inflammatory responses by activating UPR. However, the possible underlying mechanism has not been fully elucidated. Accordingly, we investigated the effects of 3-oxo-C12-HSL on cellular viability, UPR activation, lipopolysaccharide (LPS)-induced NF-kappaB activation and inflammatory response in the RAW264.7 mouse macrophage cell line. Treatment with 6.25 muM 3-oxo-C12-HSL was not found to affect the viability of RAW264.7 cells. However, pretreating RAW264.7 cells with 6.25 muM 3-oxo-C12-HSL effectively triggered UPR and increased the expression of UPR target genes, such as CCAAT/enhancer-binding protein beta (C/EBP beta) and CCAAT/enhancer-binding protein-homologous protein (CHOP). The expression of C/EBP beta and CHOP was found to be inversely correlated with LPS-induced NF-kappaB activation. 3-Oxo-C12-HSL pretreatment was also shown to inhibit LPS-stimulated proinflammatory cytokine production. Hence, 3-oxo-C12-HSL may attenuate LPS-induced inflammation via UPR-mediated NF-kappaB inhibition without affecting cell viability. This may be another mechanism through which P. aeruginosa evades the host immune system and maintains a persistent infection.
ESTHER : Zhang_2014_Biomed.Rep_2_233
PubMedSearch : Zhang_2014_Biomed.Rep_2_233
PubMedID: 24649102

Title : Pattern of innervation and recruitment of different classes of motoneurons in adult zebrafish - Ampatzis_2013_J.Neurosci_33_10875
Author(s) : Ampatzis K , Song J , Ausborn J , El Manira A
Ref : Journal of Neuroscience , 33 :10875 , 2013
Abstract : In vertebrates, spinal circuits drive rhythmic firing in motoneurons in the appropriate sequence to produce locomotor movements. These circuits become active early during development and mature gradually to acquire the flexibility necessary to accommodate the increased behavioral repertoire of adult animals. The focus here is to elucidate how different pools of motoneurons are organized and recruited and how membrane properties contribute to their mode of operation. For this purpose, we have used the in vitro preparation of adult zebrafish. We show that different motoneuron pools are organized in a somatotopic fashion in the motor column related to the type of muscle fibers (slow, intermediate, fast) they innervate. During swimming, the different motoneuron pools are recruited in a stepwise manner from slow, to intermediate, to fast to cover the full range of locomotor frequencies seen in intact animals. The spike threshold, filtering properties, and firing patterns of the different motoneuron pools are graded in a manner that relates to their order of recruitment. Our results thus show that motoneurons in adult zebrafish are organized into distinct modules, each with defined locations, properties, and recruitment patterns tuned to precisely match the muscle properties and hence produce swimming of different speeds and modalities.
ESTHER : Ampatzis_2013_J.Neurosci_33_10875
PubMedSearch : Ampatzis_2013_J.Neurosci_33_10875
PubMedID: 23804107

Title : Molecular cloning and characterization of a newly isolated pyrethroid-degrading esterase gene from a genomic library of Ochrobactrum anthropi YZ-1 - Ruan_2013_PLoS.One_8_e77329
Author(s) : Ruan Z , Zhai Y , Song J , Shi Y , Li K , Zhao B , Yan Y
Ref : PLoS ONE , 8 :e77329 , 2013
Abstract : A novel pyrethroid-degrading esterase gene pytY was isolated from the genomic library of Ochrobactrum anthropi YZ-1. It possesses an open reading frame (ORF) of 897 bp. Blast search showed that its deduced amino acid sequence shares moderate identities (30% to 46%) with most homologous esterases. Phylogenetic analysis revealed that PytY is a member of the esterase VI family. pytY showed very low sequence similarity compared with reported pyrethroid-degrading genes. PytY was expressed, purified, and characterized. Enzyme assay revealed that PytY is a broad-spectrum degrading enzyme that can degrade various pyrethroids. It is a new pyrethroid-degrading gene and enriches genetic resource. Kinetic constants of Km and Vmax were 2.34 mmol.L(-1) and 56.33 nmol min(-1), respectively, with lambda-cyhalothrin as substrate. PytY displayed good degrading ability and stability over a broad range of temperature and pH. The optimal temperature and pH were of 35 degrees C and 7.5. No cofactors were required for enzyme activity. The results highlighted the potential use of PytY in the elimination of pyrethroid residuals from contaminated environments.
ESTHER : Ruan_2013_PLoS.One_8_e77329
PubMedSearch : Ruan_2013_PLoS.One_8_e77329
PubMedID: 24155944
Gene_locus related to this paper: 9rhiz-c4wm13

Title : Relationship between CES2 genetic variations and rifampicin metabolism - Song_2013_J.Antimicrob.Chemother_68_1281
Author(s) : Song SH , Chang HE , Jun SH , Park KU , Lee JH , Lee EM , Song YH , Song J
Ref : J Antimicrob Chemother , 68 :1281 , 2013
Abstract : OBJECTIVES: Rifampicin is known to be deacetylated in vivo, resulting in its metabolite 25-desacetyl rifampicin, but the enzyme metabolizing rifampicin and the association of this process with any genetic variation have not yet been elucidated. In this study, genetic variations of a surrogate enzyme, carboxylesterase 2 (CES2), and their association with the metabolism of this drug, were investigated.
METHODS: Plasma concentrations of rifampicin and 25-desacetyl rifampicin were measured in 35 patients with tuberculosis receiving a first-line antituberculosis treatment. Direct PCR-based sequencing of the CES2 gene, covering all 12 exons, the 5'-untranslated region (UTR), the 3'-UTR and intronic and promoter regions, was performed. A dual luciferase reporter assay was carried out to assess whether variations in the promoter region affected the transcription of this gene.
RESULTS: Ten variations were detected, of which two were in the candidate promoter region, five in introns and three in the 3'-UTR. One of the variations in the 3'-UTR was a novel variation. Genotypes at three closely linked variations (c.-2263A > G, c.269-965A > G and c.1612 + 136G > A) and c.1872*302_304delGAA were associated with significantly different plasma rifampicin concentrations. The mean plasma rifampicin concentration significantly increased with the number of risk alleles at the three closely linked variations, while the plasma concentration decreased along with an increase in the number of risk alleles at c.1872*302_304delGAA. When HepG2 cells were transfected with a luciferase reporter construct bearing the c.-2263G allele, luciferase activities were consistently decreased (by 5%-10%) compared with those harbouring the c.-2263A sequence.
CONCLUSIONS: Variations in CES2, especially c.-2263A > G in the promoter region, may alter rifampicin metabolism by affecting expression of the gene.
ESTHER : Song_2013_J.Antimicrob.Chemother_68_1281
PubMedSearch : Song_2013_J.Antimicrob.Chemother_68_1281
PubMedID: 23471941
Gene_locus related to this paper: human-CES2

Title : Draft genome sequence of the biocontrol bacterium Bacillus amyloliquefaciens strain M27 - Lee_2012_J.Bacteriol_194_6934
Author(s) : Lee SY , Kim BY , Ahn JH , Song J , Seol YJ , Kim WG , Weon HY
Ref : Journal of Bacteriology , 194 :6934 , 2012
Abstract : Bacillus amyloliquefaciens strain M27 is a biocontrol agent with antagonistic activities against a wide range of fungal pathogens. Here we present the 3.86-Mb draft genome sequence of the bacterium with the aims of providing insights into the genomic basis of its antifungal mechanism and facilitating its application in the biocontrol of plant diseases.
ESTHER : Lee_2012_J.Bacteriol_194_6934
PubMedSearch : Lee_2012_J.Bacteriol_194_6934
PubMedID: 23209201
Gene_locus related to this paper: baca2-a7z924

Title : Enhanced catalytic activity of lipase encapsulated in PCL nanofibers - Song_2012_Langmuir_28_6157
Author(s) : Song J , Kahveci D , Chen M , Guo Z , Xie E , Xu X , Besenbacher F , Dong M
Ref : Langmuir , 28 :6157 , 2012
Abstract : Use of biocatalysis for industrial synthetic chemistry is on the verge of significant growth. Enzyme immobilization as an effective strategy for improving the enzyme activity has emerged from developments especially in nanoscience and nanotechnology. Here, lipase from Burkholderia cepacia (LBC), as an example of the luxuriant enzymes, was successfully encapsulated in polycaprolactone (PCL) nanofibers, proven by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Evaluated in both organic and aqueous medium, the activation factor of the encapsulated enzymes in the hydrolysis reaction was generally higher than that in the transesterification reaction. Enhanced catalytic activities were found when 5-20 w/w % of LBC was loaded. The effect of different solvents pretreatment on the activity of immobilized LBC was also investigated. The highest activation factor was found up to 14 for the sample containing acetone-treated LBC/PCL (10 w/w %). The encapsulated lipase reserved 50% of its original activity after the 10th run in the transesterification reaction in hexane medium. The mechanism of activation of lipase catalytic ability based on active PCL nanofiberous matrix is proposed.
ESTHER : Song_2012_Langmuir_28_6157
PubMedSearch : Song_2012_Langmuir_28_6157
PubMedID: 22397625

Title : Human adipose tissue-derived mesenchymal stem cells: characteristics and therapeutic potential as cellular vehicles for prodrug gene therapy against brainstem gliomas - Choi_2012_Eur.J.Cancer_48_129
Author(s) : Choi SA , Lee JY , Wang KC , Phi JH , Song SH , Song J , Kim SK
Ref : Eur J Cancer , 48 :129 , 2012
Abstract : Human mesenchymal stem cells (hMSCs) have emerged as attractive cellular vehicles for gene therapy against brain malignancy because of their targeted tropism for cancer and the intrinsic attribute of autologous transplantation. We evaluated the characteristics and therapeutic potential of human adipose tissue-derived MSCs (hAT-MSCs) and prodrug gene therapy against diffuse pontine gliomas. The hAT-MSCs were isolated from human adipose tissue and characterised for morphology, surface markers and potential to differentiate into mesenchymal and neuronal lineages. We genetically modified hAT-MSCs to express rabbit carboxylesterase (rCE) enzyme, which can efficiently convert the prodrug CPT-11 (irinotecan-7-ethyl-10-[4-(1-piperidino)-1-piperidino]carbonyloxycamptothecin), into the active drug SN-38 (7-ethyl-10-hydroxycamptothecin). The migratory capacity of hAT-MSCs expressing rCE (hAT-MSC.rCE), their ability to convert CPT-11 to SN-38 and cytotoxic effect on F98 cells were evaluated in vitro. The therapeutic potential of hAT-MSC.rCE was confirmed using a rat brainstem glioma model. The hAT-MSCs showed fibroblast-like morphology and expressed hMSC-specific markers including CD73, CD90 and CD105. The hAT-MSCs could differentiate into a mesenchymal lineage and transdifferentiate into a neuronal lineage under optimum culture conditions. The hAT-MSC.rCE converted CPT-11 to SN-38 and preserved the tumour tropism of hAT-MSCs. Brainstem glioma-bearing rats treated with hAT-MSC.rCE and CPT-11 survived 5d more than rats treated with CPT-11 only (p=0.0018). Our study demonstrates that hAT-MSCs can be easily prepared and genetically modified as cellular vehicles for prodrug gene therapy and that they have therapeutic potential against brainstem gliomas.
ESTHER : Choi_2012_Eur.J.Cancer_48_129
PubMedSearch : Choi_2012_Eur.J.Cancer_48_129
PubMedID: 21664124

Title : Treatment with endotracheal therapeutics after sarin microinstillation inhalation exposure increases blood cholinesterase levels in guinea pigs - Che_2012_Toxicol.Mech.Methods_22_250
Author(s) : Che MM , Song J , Oguntayo S , Doctor BP , Rezk P , Perkins MW , Sciuto AM , Nambiar MP
Ref : Toxicol Mech Methods , 22 :250 , 2012
Abstract : Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activities were measured in the blood and tissues of animals that are treated with a number of endotracheally aerosolized therapeutics for protection against inhalation toxicity to sarin. Therapeutics included, aerosolized atropine methyl bromide (AMB), scopolamine or combination of AMB with salbutamol, sphingosine 1-phosphate, keratinocyte growth factor, adenosine A1 receptor antisense oligonucleotide (EPI2010), 2,3-diacetyloxybenzoic acid (2,3 DABA), oxycyte, and survanta. Guinea pigs exposed to 677.4 mg/m(3) or 846.5 mg/m(3) (1.2 LCt(50)) sarin for 4 min using a microinstillation inhalation exposure technique and treated 1 min later with the aerosolized therapeutics. Treatment with all therapeutics significantly increased the survival rate with no convulsions throughout the 24 h study period. Blood AChE activity determined using acetylthiocholine as substrate showed 20% activity remaining in sarin-exposed animals compare to controls. In aerosolized AMB and scopolamine-treated animals the remaining AChE activity was significantly higher (45-60%) compared to sarin-exposed animals (p < 0.05). Similarly, treatment with all the combination therapeutics resulted in significant increase in blood AChE activity in comparison to sarin-exposed animals although the increases varied between treatments (p < 0.05). BChE activity was increased after treatment with aerosolized therapeutics but was lesser in magnitude compared to AChE activity changes. Various tissues showed elevated AChE activity after therapeutic treatment of sarin-exposed animals. Increased AChE and BChE activities in animals treated with nasal therapeutics suggest that enhanced breathing and reduced respiratory toxicity/lung injury possibly contribute to rapid normalization of chemical warfare nerve agent inhibited cholinesterases.
ESTHER : Che_2012_Toxicol.Mech.Methods_22_250
PubMedSearch : Che_2012_Toxicol.Mech.Methods_22_250
PubMedID: 22145985

Title : Gating the polarity of endocannabinoid-mediated synaptic plasticity by nitric oxide in the spinal locomotor network - Song_2012_J.Neurosci_32_5097
Author(s) : Song J , Kyriakatos A , El Manira A
Ref : Journal of Neuroscience , 32 :5097 , 2012
Abstract : The final motor output underlying behavior arises from an appropriate balance between excitation and inhibition within neural networks. Retrograde signaling by endocannabinoids adapts synaptic strengths and the global activity of neural networks. In the spinal cord, endocannabinoids are mobilized postsynaptically from network neurons and act retrogradely on presynaptic cannabinoid receptors to potentiate the locomotor frequency. However, it is still unclear whether mechanisms exist within the locomotor networks that determine the sign of the modulation by cannabinoid receptors to differentially regulate excitation and inhibition. In this study, using the lamprey spinal cord in vitro, we first report that 2-AG (2-arachidonyl glycerol) is mobilized by network neurons and underlies a form of modulation that is embedded within the locomotor networks. We then show that the polarity of the endocannabinoid modulation is gated by nitric oxide to enable simultaneously potentiation of excitation and depression of inhibition within the spinal locomotor networks. Our results suggest that endocannabinoid and nitric oxide systems interact to mediate inversion of the polarity of synaptic plasticity within the locomotor networks. Thus, endocannabinoid and nitric oxide shift in the excitation-inhibition balance to set the excitability of the spinal locomotor network.
ESTHER : Song_2012_J.Neurosci_32_5097
PubMedSearch : Song_2012_J.Neurosci_32_5097
PubMedID: 22496555

Title : Aerosolized delivery of oxime MMB-4 in combination with atropine sulfate protects against soman exposure in guinea pigs - Perkins_2012_Inhal.Toxicol_24_539
Author(s) : Perkins MW , Pierre Z , Sabnekar P , Sciuto AM , Song J , Soojhawon I , Oguntayo S , Doctor BP , Nambiar MP
Ref : Inhal Toxicol , 24 :539 , 2012
Abstract : We evaluated the efficacy of aerosolized acetylcholinesterase (AChE) reactivator oxime MMB-4 in combination with the anticholinergic atropine sulfate for protection against respiratory toxicity and lung injury following microinstillation inhalation exposure to nerve agent soman (GD) in guinea pigs. Anesthetized animals were exposed to GD (841 mg/m(3), 1.2 LCt(50)) and treated with endotracheally aerosolized MMB-4 (50 micromol/kg) plus atropine sulfate (0.25 mg/kg) at 30 sec post-exposure. Treatment with MMB-4 plus atropine increased survival to 100% compared to 38% in animals exposed to GD. Decreases in the pulse rate and blood O(2) saturation following exposure to GD returned to normal levels in the treatment group. The body-weight loss and lung edema was significantly reduced in the treatment group. Similarly, bronchoalveolar cell death was significantly reduced in the treatment group while GD-induced increase in total cell count was decreased consistently but was not significant. GD-induced increase in bronchoalveolar protein was diminished after treatment with MMB-4 plus atropine. Bronchoalveolar lavage AChE and BChE activity were significantly increased in animals treated with MMB-4 plus atropine at 24 h. Lung and diaphragm tissue also showed a significant increase in AChE activity in the treatment group. Treatment with MMB-4 plus atropine sulfate normalized various respiratory dynamics parameters including respiratory frequency, tidal volume, peak inspiratory and expiratory flow, time of inspiration and expiration, enhanced pause and pause post-exposure to GD. Collectively, these results suggest that aerosolization of MMB-4 plus atropine increased survival, decreased respiratory toxicity and lung injury following GD inhalation exposure.
ESTHER : Perkins_2012_Inhal.Toxicol_24_539
PubMedSearch : Perkins_2012_Inhal.Toxicol_24_539
PubMedID: 22860999

Title : Molecular cloning, purification and biochemical characterization of a novel pyrethroid-hydrolyzing carboxylesterase gene from Ochrobactrum anthropi YZ-1 - Zhai_2012_J.Hazard.Mater_221-222_206
Author(s) : Zhai Y , Li K , Song J , Shi Y , Yan Y
Ref : J Hazard Mater , 221-222 :206 , 2012
Abstract : Strain YZ-1 was isolated from activated sludge and identified as Ochrobactrum anthropi. This strain was capable of degrading pyrethroids pesticides, suggesting the presence of degrading enzymes. In the present study, a novel esterase gene pytZ was cloned from the genomic library of YZ-1 successfully. The pytZ contained an open reading frame of 606bp encoding a pyrethroid-hydrolyzing carboxylesterase. Deduced amino acid sequence showed moderate identities (39-59%) with most homologous carboxylesterase, except a putative carboxylesterase from O. anthropi ATCC 49188 with the highest identity of 85%. Phylogenetic analysis revealed that PytZ belonged to esterase VI family. The gene pytZ showed no any sequence similarity with reported pyrethroid-hydrolyzing genes and was a new pyrethroid-degrading gene. PytZ was expressed in Escherichia coli BL21 (DE3) and purified using Ni-NTA Fast Start. PytZ was able to degrade various pyrethroids. The optimal temperature and pH were 35 degrees C and 7.5. This enzyme was very stable over a wide range of temperature and pH. No cofactors were required for enzyme activity. Broad substrate specificity, high enzyme activity, and the favorable stability make the PytZ a potential candidate for the detoxification of pyrethroid residues in biotechnological application.
ESTHER : Zhai_2012_J.Hazard.Mater_221-222_206
PubMedSearch : Zhai_2012_J.Hazard.Mater_221-222_206
PubMedID: 22579404
Gene_locus related to this paper: 9hyph-h2esq9

Title : Protective effects of aerosolized scopolamine against soman-induced acute respiratory toxicity in guinea pigs - Perkins_2011_Int.J.Toxicol_30_639
Author(s) : Perkins MW , Pierre Z , Rezk P , Song J , Oguntayo S , Morthole V , Sciuto AM , Doctor BP , Nambiar MP
Ref : Int J Toxicol , 30 :639 , 2011
Abstract : The protective efficacy of the antimuscarinic agent scopolamine was evaluated against soman (o-pinacolyl methylphosphonofluoridate [GD])-induced respiratory toxicity in guinea pigs. Anesthetized animals were exposed to GD (841 mg/m(3)) by microinstillation inhalation exposure and treated 30 seconds later with endotracheally aerosolized scopolamine (0.25 mg/kg) and allowed to recover for 24 hours. Treatment with scopolamine significantly increased survival and reduced clinical signs of toxicity and body weight loss in GD-exposed animals. Analysis of bronchoalveolar lavage (BAL) fluid showed normalization of GD-induced increased cell death, total cell count, and protein following scopolamine treatment. The BAL fluid acetylcholinesterase and butyrylcholinesterase levels were also increased by scopolamine treatment. Respiratory dynamics parameters were normalized at 4 and 24 hours post-GD exposure in scopolamine-treated animals. Lung histology showed that scopolamine treatment reduced bronchial epithelial and subepithelial inflammation and multifocal alveolar septal edema. These results suggest that aerosolized scopolamine considerably protects against GD-induced respiratory toxicity.
ESTHER : Perkins_2011_Int.J.Toxicol_30_639
PubMedSearch : Perkins_2011_Int.J.Toxicol_30_639
PubMedID: 21960666

Title : Improved insulin sensitivity in high fat- and high cholesterol-fed Ldlr-\/- mice with macrophage-specific transgenic expression of cholesteryl ester hydrolase: role of macrophage inflammation and infiltration into adipose tissue - Bie_2010_J.Biol.Chem_285_13630
Author(s) : Bie J , Zhao B , Song J , Ghosh S
Ref : Journal of Biological Chemistry , 285 :13630 , 2010
Abstract : Cellular cholesterol balance induces changes in the inflammatory status of macrophages, and low grade chronic inflammation is increasingly being recognized as one of the key steps in the development of atherosclerosis as well as insulin resistance. Cholesteryl ester hydrolase (CEH) catalyzes the hydrolysis of intracellular stored cholesteryl esters (CEs) and thereby enhances free cholesterol efflux and reduces cellular CE content. We have earlier reported reduced atherosclerosis and lesion necrosis in macrophage-specific CEH transgenic mice on a Ldlr(-/-) background. In the present study, we tested the hypothesis that reduced intracellular accumulation of CE in macrophages from CEH transgenic mice will attenuate expression of proinflammatory mediators, thereby reducing infiltration into adipose tissue, alleviating inflammation, and resulting in improved insulin sensitivity. Western diet fed Ldlr(-/-)CEH transgenic mice showed improved insulin sensitivity as assessed by glucose and insulin tolerance tests. Macrophages from CEH transgenic mice expressed significantly lower levels of proinflammatory cytokines (interleukin-1beta and interleukin-6) and chemokine (MCP-1; monocyte chemoattractant protein). Attenuation of NF-kappaB- and AP-1-driven gene expression was determined to be the underlying mechanism. Infiltration of macrophages into the adipose tissue that increases inflammation and impairs insulin signaling was also significantly reduced in Ldlr(-/-)CEH transgenic mice. In the OP-9 adipocyte peritoneal macrophage co-culture system, macrophages from CEH transgenic mice had a significantly reduced effect on insulin signaling as measured by Akt phosphorylation compared with nontransgenic macrophages. Taken together, these studies demonstrate that macrophage-specific overexpression of CEH decreases expression of proinflammatory mediators and attenuates macrophage infiltration into the adipose tissue, resulting in decreased circulating cytokines and improved insulin sensitivity.
ESTHER : Bie_2010_J.Biol.Chem_285_13630
PubMedSearch : Bie_2010_J.Biol.Chem_285_13630
PubMedID: 20189995

Title : Macrophage cholesteryl ester mobilization and atherosclerosis - Ghosh_2010_Vascul.Pharmacol_52_1
Author(s) : Ghosh S , Zhao B , Bie J , Song J
Ref : Vascul Pharmacol , 52 :1 , 2010
Abstract : Accumulation of cholesteryl esters (CE) stored as cytoplasmic lipid droplets is the main characteristic of macrophage foam cells that are central to the development of atherosclerotic plaques. Since only unesterified or free cholesterol (FC) can be effluxed from the cells to extracellular cholesterol acceptors, hydrolysis of CE is the obligatory first step in CE mobilization from macrophages. This reaction, catalyzed by neutral cholesteryl ester hydrolase (CEH), is increasingly being recognized as the rate-limiting step in FC efflux. CEH, therefore, regulates the process of reverse cholesterol transport and ultimate elimination of cholesterol from the body. In this review, we summarize the earlier controversies surrounding the identity of CEH in macrophages, discuss the characteristics of the various candidates recognized to date and examine their role in mobilizing cellular CE and thus regulating atherogenesis. In addition, physiological requirements to hydrolyze lipid droplet-associated substrate and complexities of interfacial catalysis are also discussed to emphasize the importance of evaluating the biochemical characteristics of candidate enzymes that may be targeted in the future to attenuate atherosclerosis.
ESTHER : Ghosh_2010_Vascul.Pharmacol_52_1
PubMedSearch : Ghosh_2010_Vascul.Pharmacol_52_1
PubMedID: 19878739

Title : Gastrointestinal acetylcholinesterase activity following endotracheal microinstillation inhalation exposure to sarin in guinea pigs - Chanda_2010_Chem.Biol.Interact_187_309
Author(s) : Chanda S , Song J , Rezk P , Sabnekar P , Doctor BP , Sciuto AM , Nambiar MP
Ref : Chemico-Biological Interactions , 187 :309 , 2010
Abstract : The goal of this study was to assess acetylcholinesterase (AChE) inhibition at different regions of the gastrointestinal (GI) tract following inhalation exposure to nerve agent sarin. Seven major regions of the GI tract were removed from saline control animals (n=3) and 677.4 mg/m(3) sarin-exposed animals at 4h (n=4) and 24h (n=4) post-exposure. AChE activity was determined in blood and homogenized tissue supernatant by specific Ellman's assay using Iso-OMPA, a BChE inhibitor, and expressed as activity/optical density of hemoglobin for blood and activity/mg protein for tissues. Our data showed that the AChE activity was significantly decreased for groups both 4h and 24h post-sarin exposure. Among the seven chosen regions of the guinea pig GI tract, duodenum showed the highest AChE activity in control animals. The AChE activity was significantly decreased in the stomach (p=0.03), duodenum (p=0.029), jejunum (p=0.006), and ileum (p=0.006) 4h following sarin exposure. At 24h post-sarin exposure the AChE activity of duodenum (p=0.029) and ileum (p=0.006) was significantly inhibited. Esophagus showed no inhibition following sarin exposure at both 4h and 24h groups. These results suggest that the AChE activity is different in different regions of the GI tract and highest levels of AChE inhibition following sarin exposure were seen in regions exhibiting higher overall AChE activity and cholinergic function.
ESTHER : Chanda_2010_Chem.Biol.Interact_187_309
PubMedSearch : Chanda_2010_Chem.Biol.Interact_187_309
PubMedID: 20227400

Title : Influence of Pseudomonas aeruginosa quorum sensing signal molecule N-(3-oxododecanoyl) homoserine lactone on mast cells - Li_2009_Med.Microbiol.Immunol_198_113
Author(s) : Li H , Wang L , Ye L , Mao Y , Xie X , Xia C , Chen J , Lu Z , Song J
Ref : Med Microbiol Immunol , 198 :113 , 2009
Abstract : Quorum sensing system is a cell-to-cell communication system that plays a pivotal role in virulence expression in bacteria. Recent advances have demonstrated that the Pseudomonas aeruginosa quorum sensing molecule, N-3-oxododecanoyl homoserine lactone (3OC(12)-HSL), exerts effects on mammalian cells and modulates host immune response. Mast cells (MCs) are strategically located in the tissues that are constantly exposed to external stimulus. Therefore, it is very much possible that 3OC(12)-HSL may interact with MCs. Little is known, however, about specific effects of 3OC(12)-HSL on MCs. To address this, we investigated the influence of 3OC(12)-HSL on cell viability, apoptosis, intracellular calcium and cytokine release in MCs. We found that at high concentrations (100 microM), 3OC(12)-HSL inhibited proliferation and induced apoptosis in P815. The 3OC(12)-HSL treatment significantly increased intracellular calcium release in both P815 and HMC-1. We also observed that 3OC(12)-HSL-induced histamine release and degranulation in HMC-1 cells. Furthermore, 3OC(12)-HSL-induced IL-6 production at lower concentrations (6.25-12.5 microM) but steadily reduced IL-6 production at high concentration (50-100 muM). These data demonstrate that P. aeruginosa 3OC(12)-HSL affects MCs function.
ESTHER : Li_2009_Med.Microbiol.Immunol_198_113
PubMedSearch : Li_2009_Med.Microbiol.Immunol_198_113
PubMedID: 19337750

Title : Genome sequence and analysis of the Irish potato famine pathogen Phytophthora infestans - Haas_2009_Nature_461_393
Author(s) : Haas BJ , Kamoun S , Zody MC , Jiang RH , Handsaker RE , Cano LM , Grabherr M , Kodira CD , Raffaele S , Torto-Alalibo T , Bozkurt TO , Ah-Fong AM , Alvarado L , Anderson VL , Armstrong MR , Avrova A , Baxter L , Beynon J , Boevink PC , Bollmann SR , Bos JI , Bulone V , Cai G , Cakir C , Carrington JC , Chawner M , Conti L , Costanzo S , Ewan R , Fahlgren N , Fischbach MA , Fugelstad J , Gilroy EM , Gnerre S , Green PJ , Grenville-Briggs LJ , Griffith J , Grunwald NJ , Horn K , Horner NR , Hu CH , Huitema E , Jeong DH , Jones AM , Jones JD , Jones RW , Karlsson EK , Kunjeti SG , Lamour K , Liu Z , Ma L , Maclean D , Chibucos MC , McDonald H , McWalters J , Meijer HJ , Morgan W , Morris PF , Munro CA , O'Neill K , Ospina-Giraldo M , Pinzon A , Pritchard L , Ramsahoye B , Ren Q , Restrepo S , Roy S , Sadanandom A , Savidor A , Schornack S , Schwartz DC , Schumann UD , Schwessinger B , Seyer L , Sharpe T , Silvar C , Song J , Studholme DJ , Sykes S , Thines M , van de Vondervoort PJ , Phuntumart V , Wawra S , Weide R , Win J , Young C , Zhou S , Fry W , Meyers BC , van West P , Ristaino J , Govers F , Birch PR , Whisson SC , Judelson HS , Nusbaum C
Ref : Nature , 461 :393 , 2009
Abstract : Phytophthora infestans is the most destructive pathogen of potato and a model organism for the oomycetes, a distinct lineage of fungus-like eukaryotes that are related to organisms such as brown algae and diatoms. As the agent of the Irish potato famine in the mid-nineteenth century, P. infestans has had a tremendous effect on human history, resulting in famine and population displacement. To this day, it affects world agriculture by causing the most destructive disease of potato, the fourth largest food crop and a critical alternative to the major cereal crops for feeding the world's population. Current annual worldwide potato crop losses due to late blight are conservatively estimated at $$6.7 billion. Management of this devastating pathogen is challenged by its remarkable speed of adaptation to control strategies such as genetically resistant cultivars. Here we report the sequence of the P. infestans genome, which at approximately 240 megabases (Mb) is by far the largest and most complex genome sequenced so far in the chromalveolates. Its expansion results from a proliferation of repetitive DNA accounting for approximately 74% of the genome. Comparison with two other Phytophthora genomes showed rapid turnover and extensive expansion of specific families of secreted disease effector proteins, including many genes that are induced during infection or are predicted to have activities that alter host physiology. These fast-evolving effector genes are localized to highly dynamic and expanded regions of the P. infestans genome. This probably plays a crucial part in the rapid adaptability of the pathogen to host plants and underpins its evolutionary potential.
ESTHER : Haas_2009_Nature_461_393
PubMedSearch : Haas_2009_Nature_461_393
PubMedID: 19741609
Gene_locus related to this paper: phyin-ENDO2 , phyin-q2m440 , phyin-q58g92 , phyit-d0mqp1 , phyit-d0mqp2 , phyit-d0mt75 , phyit-d0muv1 , phyit-d0mv34 , phyit-d0mv35 , phyit-d0mwf9 , phyit-d0mxu5 , phyit-d0n935 , phyit-d0nax9 , phyit-d0nfs3 , phyit-d0nhj2 , phyit-d0nhj4 , phyit-d0nhj8 , phyit-d0ni28 , phyit-d0nj14 , phyit-d0nj53 , phyit-d0nj54 , phyit-d0njf2 , phyit-d0nkm4 , phyit-d0nr53 , phyit-d0nrb1 , phyit-d0nrk9 , phyit-d0nrl4 , phyit-d0ns26 , phyit-d0ns42 , phyit-d0ns43 , phyit-d0nsr8 , phyit-d0nu41 , phyit-d0nvt3 , phyit-d0nwb6 , phyit-d0nwm8 , phyit-d0nzc0 , phyit-d0nzc1 , phyit-d0p0z1 , phyit-d0p3z2 , phyit-kex1 , phyit-d0n6q6 , phyit-d0n4i8 , phyit-d0mqf7 , phyit-d0n5g6

Title : The genome sequence of taurine cattle: a window to ruminant biology and evolution - Elsik_2009_Science_324_522
Author(s) : Elsik CG , Tellam RL , Worley KC , Gibbs RA , Muzny DM , Weinstock GM , Adelson DL , Eichler EE , Elnitski L , Guigo R , Hamernik DL , Kappes SM , Lewin HA , Lynn DJ , Nicholas FW , Reymond A , Rijnkels M , Skow LC , Zdobnov EM , Schook L , Womack J , Alioto T , Antonarakis SE , Astashyn A , Chapple CE , Chen HC , Chrast J , Camara F , Ermolaeva O , Henrichsen CN , Hlavina W , Kapustin Y , Kiryutin B , Kitts P , Kokocinski F , Landrum M , Maglott D , Pruitt K , Sapojnikov V , Searle SM , Solovyev V , Souvorov A , Ucla C , Wyss C , Anzola JM , Gerlach D , Elhaik E , Graur D , Reese JT , Edgar RC , McEwan JC , Payne GM , Raison JM , Junier T , Kriventseva EV , Eyras E , Plass M , Donthu R , Larkin DM , Reecy J , Yang MQ , Chen L , Cheng Z , Chitko-McKown CG , Liu GE , Matukumalli LK , Song J , Zhu B , Bradley DG , Brinkman FS , Lau LP , Whiteside MD , Walker A , Wheeler TT , Casey T , German JB , Lemay DG , Maqbool NJ , Molenaar AJ , Seo S , Stothard P , Baldwin CL , Baxter R , Brinkmeyer-Langford CL , Brown WC , Childers CP , Connelley T , Ellis SA , Fritz K , Glass EJ , Herzig CT , Iivanainen A , Lahmers KK , Bennett AK , Dickens CM , Gilbert JG , Hagen DE , Salih H , Aerts J , Caetano AR , Dalrymple B , Garcia JF , Gill CA , Hiendleder SG , Memili E , Spurlock D , Williams JL , Alexander L , Brownstein MJ , Guan L , Holt RA , Jones SJ , Marra MA , Moore R , Moore SS , Roberts A , Taniguchi M , Waterman RC , Chacko J , Chandrabose MM , Cree A , Dao MD , Dinh HH , Gabisi RA , Hines S , Hume J , Jhangiani SN , Joshi V , Kovar CL , Lewis LR , Liu YS , Lopez J , Morgan MB , Nguyen NB , Okwuonu GO , Ruiz SJ , Santibanez J , Wright RA , Buhay C , Ding Y , Dugan-Rocha S , Herdandez J , Holder M , Sabo A , Egan A , Goodell J , Wilczek-Boney K , Fowler GR , Hitchens ME , Lozado RJ , Moen C , Steffen D , Warren JT , Zhang J , Chiu R , Schein JE , Durbin KJ , Havlak P , Jiang H , Liu Y , Qin X , Ren Y , Shen Y , Song H , Bell SN , Davis C , Johnson AJ , Lee S , Nazareth LV , Patel BM , Pu LL , Vattathil S , Williams RL, Jr. , Curry S , Hamilton C , Sodergren E , Wheeler DA , Barris W , Bennett GL , Eggen A , Green RD , Harhay GP , Hobbs M , Jann O , Keele JW , Kent MP , Lien S , McKay SD , McWilliam S , Ratnakumar A , Schnabel RD , Smith T , Snelling WM , Sonstegard TS , Stone RT , Sugimoto Y , Takasuga A , Taylor JF , Van Tassell CP , Macneil MD , Abatepaulo AR , Abbey CA , Ahola V , Almeida IG , Amadio AF , Anatriello E , Bahadue SM , Biase FH , Boldt CR , Carroll JA , Carvalho WA , Cervelatti EP , Chacko E , Chapin JE , Cheng Y , Choi J , Colley AJ , de Campos TA , De Donato M , Santos IK , de Oliveira CJ , Deobald H , Devinoy E , Donohue KE , Dovc P , Eberlein A , Fitzsimmons CJ , Franzin AM , Garcia GR , Genini S , Gladney CJ , Grant JR , Greaser ML , Green JA , Hadsell DL , Hakimov HA , Halgren R , Harrow JL , Hart EA , Hastings N , Hernandez M , Hu ZL , Ingham A , Iso-Touru T , Jamis C , Jensen K , Kapetis D , Kerr T , Khalil SS , Khatib H , Kolbehdari D , Kumar CG , Kumar D , Leach R , Lee JC , Li C , Logan KM , Malinverni R , Marques E , Martin WF , Martins NF , Maruyama SR , Mazza R , McLean KL , Medrano JF , Moreno BT , More DD , Muntean CT , Nandakumar HP , Nogueira MF , Olsaker I , Pant SD , Panzitta F , Pastor RC , Poli MA , Poslusny N , Rachagani S , Ranganathan S , Razpet A , Riggs PK , Rincon G , Rodriguez-Osorio N , Rodriguez-Zas SL , Romero NE , Rosenwald A , Sando L , Schmutz SM , Shen L , Sherman L , Southey BR , Lutzow YS , Sweedler JV , Tammen I , Telugu BP , Urbanski JM , Utsunomiya YT , Verschoor CP , Waardenberg AJ , Wang Z , Ward R , Weikard R , Welsh TH, Jr. , White SN , Wilming LG , Wunderlich KR , Yang J , Zhao FQ
Ref : Science , 324 :522 , 2009
Abstract : To understand the biology and evolution of ruminants, the cattle genome was sequenced to about sevenfold coverage. The cattle genome contains a minimum of 22,000 genes, with a core set of 14,345 orthologs shared among seven mammalian species of which 1217 are absent or undetected in noneutherian (marsupial or monotreme) genomes. Cattle-specific evolutionary breakpoint regions in chromosomes have a higher density of segmental duplications, enrichment of repetitive elements, and species-specific variations in genes associated with lactation and immune responsiveness. Genes involved in metabolism are generally highly conserved, although five metabolic genes are deleted or extensively diverged from their human orthologs. The cattle genome sequence thus provides a resource for understanding mammalian evolution and accelerating livestock genetic improvement for milk and meat production.
ESTHER : Elsik_2009_Science_324_522
PubMedSearch : Elsik_2009_Science_324_522
PubMedID: 19390049
Gene_locus related to this paper: bovin-2neur , bovin-a0jnh8 , bovin-a5d7b7 , bovin-ACHE , bovin-balip , bovin-dpp4 , bovin-dpp6 , bovin-e1bi31 , bovin-e1bn79 , bovin-est8 , bovin-f1mbd6 , bovin-f1mi11 , bovin-f1mr65 , bovin-f1n1l4 , bovin-g3mxp5 , bovin-q0vcc8 , bovin-q2kj30 , bovin-q3t0r6 , bovin-thyro

Title : Characterization of the saframycin A gene cluster from Streptomyces lavendulae NRRL 11002 revealing a nonribosomal peptide synthetase system for assembling the unusual tetrapeptidyl skeleton in an iterative manner - Li_2008_J.Bacteriol_190_251
Author(s) : Li L , Deng W , Song J , Ding W , Zhao QF , Peng C , Song WW , Tang GL , Liu W
Ref : Journal of Bacteriology , 190 :251 , 2008
Abstract : Saframycin A (SFM-A), produced by Streptomyces lavendulae NRRL 11002, belongs to the tetrahydroisoquinoline family of antibiotics, and its core is structurally similar to the core of ecteinascidin 743, which is a highly potent antitumor drug isolated from a marine tunicate. In this study, the biosynthetic gene cluster for SFM-A was cloned and localized to a 62-kb contiguous DNA region. Sequence analysis revealed 30 genes that constitute the SFM-A gene cluster, encoding an unusual nonribosomal peptide synthetase (NRPS) system and tailoring enzymes and regulatory and resistance proteins. The results of substrate prediction and in vitro characterization of the adenylation specificities of this NRPS system support the hypothesis that the last module acts in an iterative manner to form a tetrapeptidyl intermediate and that the colinearity rule does not apply. Although this mechanism is different from those proposed for the SFM-A analogs SFM-Mx1 and safracin B (SAC-B), based on the high similarity of these systems, it is likely they share a common mechanism of biosynthesis as we describe here. Construction of the biosynthetic pathway of SFM-Y3, an aminated SFM-A, was achieved in the SAC-B producer (Pseudomonas fluorescens). These findings not only shed new insight on tetrahydroisoquinoline biosynthesis but also demonstrate the feasibility of engineering microorganisms to generate structurally more complex and biologically more active analogs by combinatorial biosynthesis.
ESTHER : Li_2008_J.Bacteriol_190_251
PubMedSearch : Li_2008_J.Bacteriol_190_251
PubMedID: 17981978

Title : Hepatic overexpression of cholesteryl ester hydrolase enhances cholesterol elimination and in vivo reverse cholesterol transport - Zhao_2008_J.Lipid.Res_49_2212
Author(s) : Zhao B , Song J , Ghosh S
Ref : J Lipid Res , 49 :2212 , 2008
Abstract : Neutral cholesteryl ester hydrolase (CEH)-mediated hydrolysis of cellular cholesteryl esters (CEs) is required not only to generate free cholesterol (FC) for efflux from macrophages but also to release FC from lipoprotein-delivered CE in the liver for bile acid synthesis or direct secretion into the bile. We hypothesized that hepatic expression of CEH would regulate the hydrolysis of lipoprotein-derived CE and enhance reverse cholesterol transport (RCT). Adenoviral-mediated CEH overexpression led to a significant increase in bile acid output. To assess the role of hepatic CEH in promoting flux of cholesterol from macrophages to feces, cholesterol-loaded and [3H]cholesterol-labeled J774 macrophages were injected intraperitoneally into mice and the appearance of [3H]cholesterol in gallbladder bile and feces over 48 h was quantified. Mice overexpressing CEH had significantly higher [3H]cholesterol radiolabel in bile and feces, and it was associated with bile acids. This CEH-mediated increased movement of [3H]cholesterol from macrophages to bile acids and feces was significantly attenuated in SR-BI(-/-) mice. These studies demonstrate that similar to macrophage CEH that rate-limits the first step, hepatic CEH regulates the last step of RCT by promoting the flux of cholesterol entering the liver via SR-BI and increasing hepatic bile acid output.
ESTHER : Zhao_2008_J.Lipid.Res_49_2212
PubMedSearch : Zhao_2008_J.Lipid.Res_49_2212
PubMedID: 18599737
Gene_locus related to this paper: human-CES1

Title : Stable overexpression of human macrophage cholesteryl ester hydrolase results in enhanced free cholesterol efflux from human THP1 macrophages - Zhao_Am.J.Physiol.Cell.Physiol_292_C405
Author(s) : Zhao B , Song J , St Clair RW , Ghosh S
Ref : American Journal of Physiology Cell Physiol , 292 :C405 , 2007
Abstract : Reduction of the lipid burden of atherosclerotic lesion-associated macrophage foam cells is a logical strategy to reduce the plaque volume. Since extracellular cholesterol acceptor-mediated cholesterol efflux is the only recognized mechanism of cholesterol removal from foam cells and this process is rate limited at the level of intracellular cholesterol ester hydrolysis, a reaction catalyzed by neutral cholesteryl ester hydrolase (CEH), we examined the hypothesis that CEH overexpression in the human macrophage monocyte/macrophage cell line THP1 results in increased cholesterol efflux, as well as decreased cellular cholesterol ester accumulation. We generated THP1-CEH cells with stable integration of human macrophage CEH cDNA driven by the cytomegalovirus promoter. Compared with wild-type THP1 cells (THP1-WT), THP1-CEH cells showed increased CEH mRNA expression and increased CEH activity. Efflux of free or unesterified cholesterol by acetylated LDL-loaded THP1-CEH cells to ApoA-I by an ABCA1-dependent pathway or to HDL by an ABCG1-dependent pathway was significantly higher than that in THP1-WT cells. In addition, THP1-CEH cells accumulated significantly lower amount of esterified cholesterol. CEH overexpression, therefore, not only enhances cholesterol efflux but also reduces cellular accumulation of cholesteryl esters. Taken together, these data provide evidence for evaluating CEH expression in human macrophages as a potential target for attenuation of foam cell formation and regression of atherosclerotic plaques.
ESTHER : Zhao_Am.J.Physiol.Cell.Physiol_292_C405
PubMedSearch : Zhao_Am.J.Physiol.Cell.Physiol_292_C405
PubMedID: 16971496
Gene_locus related to this paper: human-CES1

Title : Macrophage-specific transgenic expression of cholesteryl ester hydrolase significantly reduces atherosclerosis and lesion necrosis in Ldlr mice - Zhao_2007_J.Clin.Invest_117_2983
Author(s) : Zhao B , Song J , Chow WN , St Clair RW , Rudel LL , Ghosh S
Ref : J Clinical Investigation , 117 :2983 , 2007
Abstract : Accumulation of cholesteryl esters (CEs) in macrophage foam cells, central to atherosclerotic plaque formation, occurs as a result of imbalance between the cholesterol influx and efflux pathways. While the uptake, or influx, of modified lipoproteins is largely unregulated, extracellular acceptor-mediated free cholesterol (FC) efflux is rate limited by the intracellular hydrolysis of CE. We previously identified and cloned a neutral CE hydrolase (CEH) from human macrophages and demonstrated its role in cellular CE mobilization. In the present study, we examined the hypothesis that macrophage-specific overexpression of CEH in atherosclerosis-susceptible Ldlr(-/-) mice will result in reduction of diet-induced atherosclerosis. Transgenic mice overexpressing this CEH specifically in the macrophages (driven by scavenger receptor promoter/enhancer) were developed and crossed into the Ldlr(-/-) background (Ldlr(-/-)CEHTg mice). Macrophage-specific overexpression of CEH led to a significant reduction in the lesion area and cholesterol content of high-fat, high-cholesterol diet-induced atherosclerotic lesions. The lesions from Ldlr(-/-)CEHTg mice did not have increased FC, were less necrotic, and contained significantly higher numbers of viable macrophage foam cells. Higher CEH-mediated FC efflux resulted in enhanced flux of FC from macrophages to gall bladder bile and feces in vivo. These studies demonstrate that by enhancing cholesterol efflux and reverse cholesterol transport, macrophage-specific overexpression of CEH is antiatherogenic.
ESTHER : Zhao_2007_J.Clin.Invest_117_2983
PubMedSearch : Zhao_2007_J.Clin.Invest_117_2983
PubMedID: 17885686

Title : The genome of the social amoeba Dictyostelium discoideum - Eichinger_2005_Nature_435_43
Author(s) : Eichinger L , Pachebat JA , Glockner G , Rajandream MA , Sucgang R , Berriman M , Song J , Olsen R , Szafranski K , Xu Q , Tunggal B , Kummerfeld S , Madera M , Konfortov BA , Rivero F , Bankier AT , Lehmann R , Hamlin N , Davies R , Gaudet P , Fey P , Pilcher K , Chen G , Saunders D , Sodergren E , Davis P , Kerhornou A , Nie X , Hall N , Anjard C , Hemphill L , Bason N , Farbrother P , Desany B , Just E , Morio T , Rost R , Churcher C , Cooper J , Haydock S , van Driessche N , Cronin A , Goodhead I , Muzny D , Mourier T , Pain A , Lu M , Harper D , Lindsay R , Hauser H , James K , Quiles M , Madan Babu M , Saito T , Buchrieser C , Wardroper A , Felder M , Thangavelu M , Johnson D , Knights A , Loulseged H , Mungall K , Oliver K , Price C , Quail MA , Urushihara H , Hernandez J , Rabbinowitsch E , Steffen D , Sanders M , Ma J , Kohara Y , Sharp S , Simmonds M , Spiegler S , Tivey A , Sugano S , White B , Walker D , Woodward J , Winckler T , Tanaka Y , Shaulsky G , Schleicher M , Weinstock G , Rosenthal A , Cox EC , Chisholm RL , Gibbs R , Loomis WF , Platzer M , Kay RR , Williams J , Dear PH , Noegel AA , Barrell B , Kuspa A
Ref : Nature , 435 :43 , 2005
Abstract : The social amoebae are exceptional in their ability to alternate between unicellular and multicellular forms. Here we describe the genome of the best-studied member of this group, Dictyostelium discoideum. The gene-dense chromosomes of this organism encode approximately 12,500 predicted proteins, a high proportion of which have long, repetitive amino acid tracts. There are many genes for polyketide synthases and ABC transporters, suggesting an extensive secondary metabolism for producing and exporting small molecules. The genome is rich in complex repeats, one class of which is clustered and may serve as centromeres. Partial copies of the extrachromosomal ribosomal DNA (rDNA) element are found at the ends of each chromosome, suggesting a novel telomere structure and the use of a common mechanism to maintain both the rDNA and chromosomal termini. A proteome-based phylogeny shows that the amoebozoa diverged from the animal-fungal lineage after the plant-animal split, but Dictyostelium seems to have retained more of the diversity of the ancestral genome than have plants, animals or fungi.
ESTHER : Eichinger_2005_Nature_435_43
PubMedSearch : Eichinger_2005_Nature_435_43
PubMedID: 15875012
Gene_locus related to this paper: dicdi-abhd , dicdi-ACHE , dicdi-apra , dicdi-cinbp , dicdi-CMBL , dicdi-crysp , dicdi-DPOA , dicdi-P90528 , dicdi-ppme1 , dicdi-Q8MYE7 , dicdi-q54cf7 , dicdi-q54cl7 , dicdi-q54cm0 , dicdi-q54ct5 , dicdi-q54cu1 , dicdi-q54d54 , dicdi-q54d66 , dicdi-q54dj5 , dicdi-q54dy7 , dicdi-q54ek1 , dicdi-q54eq6 , dicdi-q54et1 , dicdi-q54et7 , dicdi-q54f01 , dicdi-q54g24 , dicdi-q54g47 , dicdi-q54gi7 , dicdi-q54gw5 , dicdi-q54gx3 , dicdi-q54h23 , dicdi-q54h73 , dicdi-q54i38 , dicdi-q54ie5 , dicdi-q54in4 , dicdi-q54kz1 , dicdi-q54l36 , dicdi-q54li1 , dicdi-q54m29 , dicdi-q54n21 , dicdi-q54n35 , dicdi-q54n85 , dicdi-q54qe7 , dicdi-q54qi3 , dicdi-q54qk2 , dicdi-q54rl3 , dicdi-q54rl8 , dicdi-q54sy6 , dicdi-q54sz3 , dicdi-q54t49 , dicdi-q54t91 , dicdi-q54th2 , dicdi-q54u01 , dicdi-q54vc2 , dicdi-q54vw1 , dicdi-q54xe3 , dicdi-q54xl3 , dicdi-q54xu1 , dicdi-q54xu2 , dicdi-q54y48 , dicdi-q54yd0 , dicdi-q54ye0 , dicdi-q54yl1 , dicdi-q54yr8 , dicdi-q54z90 , dicdi-q55bx3 , dicdi-q55d01 , dicdi-q55d81 , dicdi-q55du6 , dicdi-q55eu1 , dicdi-q55eu8 , dicdi-q55fk4 , dicdi-q55gk7 , dicdi-Q54ZA6 , dicdi-q86h82 , dicdi-Q86HC9 , dicdi-Q86HM5 , dicdi-Q86HM6 , dicdi-q86iz7 , dicdi-q86jb6 , dicdi-Q86KU7 , dicdi-q550s3 , dicdi-q552c0 , dicdi-q553t5 , dicdi-q555e5 , dicdi-q555h0 , dicdi-q555h1 , dicdi-q557k5 , dicdi-q558u2 , dicdi-Q869Q8 , dicdi-u554 , dicdi-y9086 , dicdi-q54r44 , dicdi-f172a

Title : The genome sequence and structure of rice chromosome 1 - Sasaki_2002_Nature_420_312
Author(s) : Sasaki T , Matsumoto T , Yamamoto K , Sakata K , Baba T , Katayose Y , Wu J , Niimura Y , Cheng Z , Nagamura Y , Antonio BA , Kanamori H , Hosokawa S , Masukawa M , Arikawa K , Chiden Y , Hayashi M , Okamoto M , Ando T , Aoki H , Arita K , Hamada M , Harada C , Hijishita S , Honda M , Ichikawa Y , Idonuma A , Iijima M , Ikeda M , Ikeno M , Ito S , Ito T , Ito Y , Iwabuchi A , Kamiya K , Karasawa W , Katagiri S , Kikuta A , Kobayashi N , Kono I , Machita K , Maehara T , Mizuno H , Mizubayashi T , Mukai Y , Nagasaki H , Nakashima M , Nakama Y , Nakamichi Y , Nakamura M , Namiki N , Negishi M , Ohta I , Ono N , Saji S , Sakai K , Shibata M , Shimokawa T , Shomura A , Song J , Takazaki Y , Terasawa K , Tsuji K , Waki K , Yamagata H , Yamane H , Yoshiki S , Yoshihara R , Yukawa K , Zhong H , Iwama H , Endo T , Ito H , Hahn JH , Kim HI , Eun MY , Yano M , Jiang J , Gojobori T
Ref : Nature , 420 :312 , 2002
Abstract : The rice species Oryza sativa is considered to be a model plant because of its small genome size, extensive genetic map, relative ease of transformation and synteny with other cereal crops. Here we report the essentially complete sequence of chromosome 1, the longest chromosome in the rice genome. We summarize characteristics of the chromosome structure and the biological insight gained from the sequence. The analysis of 43.3 megabases (Mb) of non-overlapping sequence reveals 6,756 protein coding genes, of which 3,161 show homology to proteins of Arabidopsis thaliana, another model plant. About 30% (2,073) of the genes have been functionally categorized. Rice chromosome 1 is (G + C)-rich, especially in its coding regions, and is characterized by several gene families that are dispersed or arranged in tandem repeats. Comparison with a draft sequence indicates the importance of a high-quality finished sequence.
ESTHER : Sasaki_2002_Nature_420_312
PubMedSearch : Sasaki_2002_Nature_420_312
PubMedID: 12447438
Gene_locus related to this paper: orysa-Q9S7P1 , orysa-Q9FYP7 , orysa-Q5ZBH3 , orysa-Q5NA74 , orysa-Q5ZA26 , orysa-Q5JLP6 , orysa-Q94D81 , orysa-cbp , orysa-Q5VQE5 , orysa-Q8RZ95 , orysa-Q9AWW1 , orysa-Q9AS70 , orysa-Q0JK71 , orysa-Q8S1D9 , orysa-Q5N8V4 , orysa-Q943F9 , orysa-B9EWJ8 , orysa-Q5N8H1 , orysa-Q5NAI4 , orysa-Q94DP8 , orysa-Q658B2 , orysa-Q5JMQ8 , orysa-Q5QMD9 , orysa-Q5N7L1 , orysa-Q5N7J6 , orysa-Q8RYV9 , orysa-Q5SNH3 , orysa-Q94DD0 , orysa-Q8W0F0 , orysa-pir7a , orysa-pir7b , orysa-Q4VWY7 , orysa-q5jlm9 , orysa-q5na00 , orysa-q5nbu1 , orysa-Q5QLC0 , orysa-q5vnp5 , orysa-Q5VP27 , orysa-Q5ZAM8 , orysa-Q5ZBI5 , orysa-q5zc23 , orysa-Q5ZCR3 , orysa-Q8L562 , orysa-Q8L570 , orysa-Q8LQS5 , orysa-Q8RZ40 , orysa-Q8RZ79 , orysa-Q8S0U8 , orysa-Q8S0V0 , orysa-Q8S125 , orysa-Q9LHX5 , orysa-Q94E46 , orysa-Q656F2 , orysi-a2wn01 , orysi-b8a7e6 , orysi-b8a7e7 , orysj-b9eya5 , orysj-q5jl22 , orysj-q5jlw7 , orysj-q94d71