Liang L

References (19)

Title : In-situ growth of SnO(2) nanoparticles on Nb(2)CT(x) nanosheets as highly sensitive electrochemical sensing platform for organophosphorus pesticide detection - Guo_2023_Colloids.Surf.B.Biointerfaces_224_113238
Author(s) : Guo W , Liang L , Zhao Y , Zhao C , Lu X , Cao Y , Gao F
Ref : Colloids Surf B Biointerfaces , 224 :113238 , 2023
Abstract : In this study, the SnO(2)/Nb(2)CT(x) MXene nanocomposite containing 0D/2D interfaces was prepared by situ growth strategy of one-step hydrothermal method. A SnO(2)/Nb(2)CT(x) MXene based acetylcholinesterase (AChE) biosensor was constructed for pesticide detection. Highly conductive Nb(2)CT(x) MXene, acting as substrate material, restrained the agglomeration of nanoparticles (NPs) and accelerated electron migration due to the confinement effect and well-known accordion-like layered structure. In addition, SnO(2) anchored on both sides of the Nb(2)CT(x) MXene nanosheets effectively provided a large surface area, abundant surface groups and active sites, which preserved numbers of electrons at the interface of the heterojunction. The SnO(2)/Nb(2)CT(x) MXene hybrids with outstanding conductivity, good biocompatibility and structural stability were beneficial for AChE immobilization. Under the optimized conditions, as-fabricated electrochemical biosensor demonstrated superior performance with linear detection range of 5.1 x 10(-14) - 5.1 x 10(-7) M for chlorpyrifos, along with the limit of detection (LOD) down to 5.1 x 10(-14) M (calculated for 10% inhibition). Furthermore, it is highly expected that this biosensor can be applied for the detection of other organophosphorus pesticides in the environment, providing an effective nanoplatform in biosensing field.
ESTHER : Guo_2023_Colloids.Surf.B.Biointerfaces_224_113238
PubMedSearch : Guo_2023_Colloids.Surf.B.Biointerfaces_224_113238
PubMedID: 36870270

Title : Clinical profile, genetic spectrum and therapy evaluation of 19 Chinese pediatric patients with lipoprotein lipase deficiency - Xia_2023_J.Clin.Lipidol__
Author(s) : Xia Y , Zheng W , Du T , Gong Z , Liang L , Wang R , Yang Y , Zhang K , Lu D , Chen X , Sun Y , Xiao B , Qiu W
Ref : J Clin Lipidol , : , 2023
Abstract : BACKGROUND: Lipoprotein lipase (LPL) deficiency, the most common familial chylomicronemia syndrome (FCS), is a rare autosomal recessive disease characterized by chylomicronemia and severe hypertriglyceridemia (HTG), with limited clinical and genetic characterization. OBJECTIVE: To describe the manifestations and management of 19 pediatric patients with LPL-FCS. METHODS: LPL-FCS patients from 2014 to 2022 were divided into low-fat (LF), very-low-fat (VLF) and medium-chain-triglyceride (MCT) groups. Their clinical data were evaluated to investigate the effect of different diets. The genotype-phenotype relationship was assessed. Linear regression comparing long-chain triglyceride (LCT) intake and TG levels was analyzed. RESULTS: Nine novel LPL variants were identified in 19 LPL-FCS pediatric patients. At baseline, eruptive xanthomas occurred in 3/19 patients, acute pancreatitis in 2/19, splenomegaly in 6/19 and hepatomegaly in 3/19. The median triglyceride (TG) level (30.3mmol/L) was markedly increased. The MCT group and VLF group with LCT intakes <20 en% (energy percentage) had considerably lower TG levels than the LF group (both p<0.05). The LF group presented with severe HTG and significantly decreased TG levels after restricting LCT intakes to <20 en% (p<0.05). Six infants decreased TG levels to <10 mmol/L by keeping LCT intake <10 en%. TG levels and LCT intake were positively correlated in both patients under 2 years (r=0.84) and those aged 2-9 years (r=0.89). No genotype-phenotype relationship was observed. CONCLUSIONS: This study broadens the clinical and genetic spectra of LPL-FCS. The primary therapy for LPL-FCS pediatric patients is restricting dietary LCTs to <10 en% or <20 en% depending on different ages. MCTs potentially provide extra energy.
ESTHER : Xia_2023_J.Clin.Lipidol__
PubMedSearch : Xia_2023_J.Clin.Lipidol__
PubMedID: 37858495
Gene_locus related to this paper: human-LPL

Title : Multi-compartmental MOF microreactors derived from Pickering double emulsions for chemo-enzymatic cascade catalysis - Tian_2023_Nat.Commun_14_3226
Author(s) : Tian D , Hao R , Zhang X , Shi H , Wang Y , Liang L , Liu H , Yang H
Ref : Nat Commun , 14 :3226 , 2023
Abstract : Bioinspired multi-compartment architectures are desired in synthetic biology and metabolic engineering, as credited by their cell-like structures and intrinsic ability of assembling catalytic species for spatiotemporal control over cascade reactions like in living systems. Herein, we describe a general Pickering double emulsion-directed interfacial synthesis method for the fabrication of multicompartmental MOF microreactors. This approach employs multiple liquid-liquid interfaces as a controllable platform for the self-completing growth of dense MOF layers, enabling the microreactor with tailor-made inner architectures and selective permeability. Importantly, simultaneous encapsulation of incompatible functionalities, including hydrophilic enzyme and hydrophobic molecular catalyst, can be realized in a single MOF microreactor for operating chemo-enzymatic cascade reactions. As exemplified by the Grubb' catalyst/CALB lipase driven olefin metathesis/ transesterification cascade reaction and glucose oxidase (GOx)/Fe-porphyrin catalyzed oxidation reaction, the multicompartmental microreactor exhibits 2.24-5.81 folds enhancement in cascade reaction efficiency in comparison to the homogeneous counterparts or physical mixture of individual analogues, due to the restrained mutual inactivation and substrate channelling effects. Our study prompts further design of multicompartment systems and the development of artificial cells capable of complex cellular transformations.
ESTHER : Tian_2023_Nat.Commun_14_3226
PubMedSearch : Tian_2023_Nat.Commun_14_3226
PubMedID: 37270555

Title : DAGLbeta is the principal synthesizing enzyme of 2-AG and promotes aggressive intrahepatic cholangiocarcinoma via AP-1\/DAGLbeta\/miR4516 feedforward circuitry - Ma_2023_Am.J.Physiol.Gastrointest.Liver.Physiol__
Author(s) : Ma M , Zeng G , Tan B , Zhao G , Su Q , Zhang W , Song Y , Liang J , Xu B , Wang Z , Chen J , Hou M , Yang C , Yun J , Huang Y , Lin Y , Chen D , Han Y , DeMorrow S , Liang L , Lai J , Huang L
Ref : American Journal of Physiology Gastrointest Liver Physiol , : , 2023
Abstract : The endocannabinoid system (ECS) is dysregulated in various liver diseases. Previously we had shown that the major endocannabinoid 2-arachidonoyl glycerol (2-AG) promoted tumorigenesis of intrahepatic cholangiocarcinoma (ICC). However, biosynthesis regulation and clinical significance of 2-AG remain elusive. In present study we quantified 2-AG by gas chromatography/mass spectrometry (GC/MS) and showed that 2-AG was enriched in ICC patients' samples as well as in thioacetamide-induced orthotopic rat ICC model. Moreover, we found that diacylglycerol lipase beta (DAGLbeta) was the principal synthesizing enzyme of 2-AG which significantly upregulated in ICC. DAGLbeta promoted tumorigenesis and metastasis of ICC in vitro and in vivo, and positively correlated with clinical stage and poor survival in ICC patients. Functional studies showed that AP-1 (heterodimers of c-Jun and FRA1) directly binded to the promoter and regulated transcription of DAGLbeta, which can be enhanced by lipopolysaccharide (LPS). miR-4516 was identified as the tumor-suppressing miRNA of ICC which can be significantly suppressed by LPS, 2-AG or ectopic DAGLbeta overexpression. FRA1 and STAT3 were targets of miR-4516 and overexpression of miRNA-4516 significantly suppressed expression of FRA1, SATA3 and DAGLbeta. Expression of miRNA-4516 was negatively correlated with FRA1, SATA3 and DAGLbeta in ICC patients' samples. Our findings identify DAGLbeta as the principal synthesizing enzyme of 2-AG in ICC. DAGLbeta promotes oncogenesis and metastasis of ICC and is transcriptionally regulated by a novel AP-1/DAGLbeta/miR4516 feedforward circuitry.
ESTHER : Ma_2023_Am.J.Physiol.Gastrointest.Liver.Physiol__
PubMedSearch : Ma_2023_Am.J.Physiol.Gastrointest.Liver.Physiol__
PubMedID: 37366545
Gene_locus related to this paper: human-DAGLB

Title : Uncovering the interactions between PME and PMEI at the gene and protein levels: Implications for the design of specific PMEI - Wang_2023_J.Mol.Model_29_286
Author(s) : Wang Y , Zhang D , Huang L , Zhang Z , Shi Q , Hu J , He G , Guo X , Shi H , Liang L
Ref : J Mol Model , 29 :286 , 2023
Abstract : CONTEXT: Pectin methylesterase inhibitor (PMEI) can specifically bind and inhibit the activity of pectin methylesterase (PME), which has been widely used in fruit and vegetable juice processing. However, the limited three-dimensional structure, unclear action mechanism, low thermal stability and biological activity of PMEI severely limited its application. In this work, molecular recognition and conformational changes of PME and PMEI were analyzed by various molecular simulation methods. Then suggestions were proposed for improving thermal stability and affinity maturation of PMEI through semi-rational design. METHODS: Phylogenetic trees of PME and PMEI were established using the Maximum likelihood (ML) method. The results show that PME and PMEI have good sequence and structure conservation in various plants, and the simulated data can be widely adopted. In this work, MD simulations were performed using AMBER20 package and ff14SB force field. Protein interaction analysis indicates that H-bonds, van der Waals forces, and the salt bridge formed of K224 with ID116 are the main driving forces for mutual molecular recognition of PME and PMEI. According to the analyses of free energy landscape (FEL), conformational cluster, and motion, the association with PMEI greatly disrupts PME's dispersed functional motion mode and biological function. By monitoring the changes of residue contact number and binding free energy, (I)G35M/ (I)G35R: (I)T93F and (I)T113W/ (I)T113W: (I)D116W mutations contribute to thermal stability and affinity maturation of the PME-PMEI complex system, respectively. This work reveals the interaction between PME and PMEI at the gene and protein levels and provides options for modifying specific PMEI.
ESTHER : Wang_2023_J.Mol.Model_29_286
PubMedSearch : Wang_2023_J.Mol.Model_29_286
PubMedID: 37610510

Title : The porous hollow cobalt-based oxides encapsulated with bimetallic PdAu Nanoparticles of electrochemical biosensor for highly sensitive pesticides detection - Zhao_2023_Nanotechnology__
Author(s) : Zhao Y , Liang L , Guo W , Lu X , Zhao C , Gao F
Ref : Nanotechnology , : , 2023
Abstract : Efficient and portable electrochemical biosensors are received to evaluation of pesticides in the environment, which can make great significance for food safety. In this study, the Co-based oxides with a kind of hierarchical porous hollow and nanocages were constructed, in which the materials (Co3O4-NC) were encapsulated with PdAu nanoparticles (NPs). Due to the unique porous structure, the changeable valence state of cobalt and the synergistic effect of bimetallic PdAuNPs, PdAu@Co3O4-NC possessed excellent electron pathways, and showed more exposed active sites. Accordingly, the porous Co-based oxides have been applied to construct an acetylcholinesterase (AChE) electrochemical biosensor, which showed good performance for organophosphorus pesticides (OPs) detection. The optimum biosensing platform based on nanocomposites was applied to exhibit highly sensitive determination of omethoate and chlorpyrifos, with the relative low detection limit of 6.125 x 10-15 M and 5.10 x 10-13 M, respectively. And a wide detection range of 6.125 x 10-15 ~ 6.125 x 10-6 M and 5.10 x 10-13 ~ 5.10 x 10-6 M for these two pesticides were achieved. Therefore, the PdAu@Co3O4-NC may represent a powerful tool for ultrasensitive sensing of OPs, and have great potential application.
ESTHER : Zhao_2023_Nanotechnology__
PubMedSearch : Zhao_2023_Nanotechnology__
PubMedID: 37054697

Title : Probing strigolactone perception mechanisms with rationally designed small-molecule agonists stimulating germination of root parasitic weeds - Wang_2022_Nat.Commun_13_3987
Author(s) : Wang D , Pang Z , Yu H , Thiombiano B , Walmsley A , Yu S , Zhang Y , Wei T , Liang L , Wang J , Wen X , Bouwmeester HJ , Yao R , Xi Z
Ref : Nat Commun , 13 :3987 , 2022
Abstract : The development of potent strigolactone (SL) agonists as suicidal germination inducers could be a useful strategy for controlling root parasitic weeds, but uncertainty about the SL perception mechanism impedes real progress. Here we describe small-molecule agonists that efficiently stimulate Phelipanchce aegyptiaca, and Striga hermonthica, germination in concentrations as low as 10(-8) to 10(-17) M. We show that full efficiency of synthetic SL agonists in triggering signaling through the Striga SL receptor, ShHTL7, depends on the receptor-catalyzed hydrolytic reaction of the agonists. Additionally, we reveal that the stereochemistry of synthetic SL analogs affects the hydrolytic ability of ShHTL7 by influencing the probability of the privileged conformations of ShHTL7. Importantly, an alternative ShHTL7-mediated hydrolysis mechanism, proceeding via nucleophilic attack of the NE2 atom of H246 to the 2'C of the D-ring, is reported. Together, our findings provide insight into SL hydrolysis and structure-perception mechanisms, and potent suicide germination stimulants, which would contribute to the elimination of the noxious parasitic weeds.
ESTHER : Wang_2022_Nat.Commun_13_3987
PubMedSearch : Wang_2022_Nat.Commun_13_3987
PubMedID: 35810153

Title : Discovery of a Broad-Spectrum Fluorogenic Agonist for Strigolactone Receptors through a Computational Approach - Wang_2021_J.Agric.Food.Chem__
Author(s) : Wang DW , Yu SY , Pang ZL , Ma DJ , Liang L , Wang X , Wei T , Yang HZ , Ma YQ , Xi Z
Ref : Journal of Agricultural and Food Chemistry , : , 2021
Abstract : Strigolactones (SLs) are plant hormones that play various roles in plant physiology, including provoking the germination of parasitic weeds Orobanche and Striga. A family of alpha/beta-hydrolases have been proposed to be the SL receptor proteins. Effective assays for measuring the activity of SL receptors could promote the development of SL-related biology and chemistry. In this study, we developed a new approach called pharmacophore-linked probe virtual screening (PPVS). Its application yielded an effective "off-on" probe named Xilatone Red (XLR). This probe showed a broad spectrum and excellent sensitivity toward SL receptors, including ShD14 (Striga D14), for which the detection limit was determined to be in the micromolar range, outperforming that of the commercial fluorogenic agonist Yoshimulactone Green (YLG). Upon hydrolysis by SL receptors, XLR provided fluorogenic and colorimetric signaling responses. Furthermore, XLR could induce germination of Phelipanche aegyptiaca seeds and prevent Arabidopsis max4-1 branching defects at micromolar concentrations. Our molecular simulations revealed the essential factors in the molecular perception of XLR. We anticipate that this study can prompt the discovery of high-performance SL agonists/antagonists to combat parasitic weeds.
ESTHER : Wang_2021_J.Agric.Food.Chem__
PubMedSearch : Wang_2021_J.Agric.Food.Chem__
PubMedID: 34478295

Title : Effects of ammonia exposure on antioxidant function, immune response and NF-kappaB pathway in Chinese Strip-necked Turtle (Mauremys sinensis) - Liang_2020_Aquat.Toxicol__105621
Author(s) : Liang L , Huang Z , Li N , Wang D , Ding L , Shi H , Hong M
Ref : Aquat Toxicol , :105621 , 2020
Abstract : As one of the main toxic substances in aquaculture water, ammonia causes seriously physiological harm to aquatic animals. In order to investigate the effects of ammonia exposure on the antioxidant defense, immune response, and NF-kappaB signaling pathway in Chinese Strip-necked Turtle (Mauremys sinensis), we designed two experimental groups (control and 6.45 mM ammonia), and sampled at 6 h, 24 h, 48 h, re 24 h (recover 24 h), and re 48 h. The results showed that the blood ammonia (BA) content was significantly increased when the turtles were subjected to ammonia, and the activities of cholinesterase (CHE) and aspartate aminotransferase (AST) in the serum also showed a significant upward trend. The malondialdehyde (MDA) content continuously increased during ammonia exposure, and more than doubled at 48 h compared with the control group. The activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-PX), catalase (CAT) and their corresponding relative mRNA expression levels in the liver during ammonia exposure were obviously increased when compared to the control group, but most decreased to the normal levels at re 48 h. In addition, the relative mRNA and protein expression levels of NF-E2 related factor 2 (Nrf2) showed similar up-regulation patterns to antioxidase during ammonia exposed periods; whereas kelch-like ECH-binding protein 1 (Keap1), as Nrf2 negative regulator, showed opposite patterns. Moreover, the relative mRNA expression levels of heat shock proteins (HSP70, HSP90) significantly elevated upon the exposure of ammonia. Furthermore, ammonia increased the relative mRNA and protein expression levels of p50 and p65 at different exposed times. The reative mRNA expression levels of immune cytokines (BAFF and IL-6) were upregulated during ammonia exposured time, while there was a decline but did not return to normal levels, in the recovery periods. Taken together, these results indicated that antioxidation, immunity, and NF-kappaB signaling played a certain protective role for Mauremys sinensis under ammonia exposure. Our results will be helpful to understand the mechanism of aquatic toxicology induced by ammonia in turtles.
ESTHER : Liang_2020_Aquat.Toxicol__105621
PubMedSearch : Liang_2020_Aquat.Toxicol__105621
PubMedID: 33129562

Title : OSBPL2 Is Required for the Binding of COPB1 to ATGL and the Regulation of Lipid Droplet Lipolysis - Wang_2020_iScience_23_101252
Author(s) : Wang T , Wei Q , Liang L , Tang X , Yao J , Lu Y , Qu Y , Chen Z , Xing G , Cao X
Ref : iScience , 23 :101252 , 2020
Abstract : The accumulation of giant lipid droplets (LDs) increases the risk of metabolic disorders including obesity and insulin resistance. The lipolysis process involves the activation and transfer of lipase, but the molecular mechanism is not completely understood. The translocation of ATGL, a critical lipolysis lipase, from the ER to the LD surface is mediated by an energy catabolism complex. Oxysterol-binding protein-like 2 (OSBPL2/ORP2) is one of the lipid transfer proteins that regulates intracellular cholesterol homeostasis. A recent study has proven that Osbpl2(-/-) pigs exhibit hypercholesterolemia and obesity phenotypes with an increase in adipocytes. In this study, we identified that OSBPL2 links the endoplasmic reticulum (ER) with LDs, binds to COPB1, and mediates ATGL transport. We provide important insights into the function of OSBPL2, indicating that it is required for the regulation of lipid droplet lipolysis.
ESTHER : Wang_2020_iScience_23_101252
PubMedSearch : Wang_2020_iScience_23_101252
PubMedID: 32650117

Title : CXCL5, the upregulated chemokine in patients with uterine cervix cancer, in vivo and in vitro contributes to oncogenic potential of Hela uterine cervix cancer cells - Feng_2018_Biomed.Pharmacother_107_1496
Author(s) : Feng X , Zhang D , Li X , Ma S , Zhang C , Wang J , Li Y , Liang L , Zhang P , Qu Y , Zhang Z , Yang Z , Xiang Y , Zhang W , Wang S , Shao W , Wang W
Ref : Biomed Pharmacother , 107 :1496 , 2018
Abstract : CXCL5 is showed a surprisingly elevated profile and implicated in tumorigenesis in several tumors. However, the expression and function of CXCL5 in uterine cervix cancer (UCC) remain largely unknown. The current study aimed to elucidate the expression pattern of CXCL5 in human UCC tissues and Hela cervix cancer cell, as well as its functions in Hela cells. Our data showed that CXCL5 and its receptor CXCR2 were expressed by Hela uterine cervix cancer cells. CXCL5 was upregulated in UCC tissues, and its overexpression was positively correlated with age, but did not correlate with clinical stages and tumor infiltration. Exogenous administration of CXCL5 and CXCL5 overexpression contributed to proliferation and migration activities of Hela cells in vitro, consistent with this, CXCL5 overexpression also promoted growth of Hela cells in a nude mouse xenograft model. At the gene level, CXCL5 overexpression regulated the expression of tumor-related genes including ERK, p-ERK, AKT, p-AKT, DIABOL, NUMB, NDRG3 and CXCR2. Taken together, CXCL5 may contribute to a dominant role in UCC progression and sever as a potential molecular therapeutic target for UCC.
ESTHER : Feng_2018_Biomed.Pharmacother_107_1496
PubMedSearch : Feng_2018_Biomed.Pharmacother_107_1496
PubMedID: 30257367

Title : Trefoil Factor 3, Cholinesterase and Homocysteine: Potential Predictors for Parkinson's Disease Dementia and Vascular Parkinsonism Dementia in Advanced Stage - Zou_2018_Aging.Dis_9_51
Author(s) : Zou J , Chen Z , Liang C , Fu Y , Wei X , Lu J , Pan M , Guo Y , Liao X , Xie H , Wu D , Li M , Liang L , Wang P , Wang Q
Ref : Aging Dis , 9 :51 , 2018
Abstract : Trefoil factor 3 (TFF3), cholinesterase activity (ChE activity) and homocysteine (Hcy) play critical roles in modulating recognition, learning and memory in neurodegenerative diseases, such as Parkinson's disease dementia (PDD) and vascular parkinsonism with dementia (VPD). However, whether they can be used as reliable predictors to evaluate the severity and progression of PDD and VPD remains largely unknown. METHODS: We performed a cross-sectional study that included 92 patients with PDD, 82 patients with VPD and 80 healthy controls. Serum levels of TFF3, ChE activity and Hcy were measured. Several scales were used to rate the severity of PDD and VPD. Receivers operating characteristic (ROC) curves were applied to map the diagnostic accuracy of PDD and VPD patients compared to healthy subjects. RESULTS: Compared with healthy subjects, the serum levels of TFF3 and ChE activity were lower, while Hcy was higher in the PDD and VPD patients. These findings were especially prominent in male patients. The three biomarkers displayed differences between PDD and VPD sub-groups based on genders and UPDRS (III) scores' distribution. Interestingly, these increased serum Hcy levels were significantly and inversely correlated with decreased TFF3/ChE activity levels. There were significant correlations between TFF3/ChE activity/Hcy levels and PDD/VPD severities, including motor dysfunction, declining cognition and mood/gastrointestinal symptoms. Additionally, ROC curves for the combination of TFF3, ChE activity and Hcy showed potential diagnostic value in discriminating PDD and VPD patients from healthy controls. CONCLUSIONS: Our findings suggest that serum TFF3, ChE activity and Hcy levels may underlie the pathophysiological mechanisms of PDD and VPD. As the race to find biomarkers or predictors for these diseases intensifies, a better understanding of the roles of TFF3, ChE activity and Hcy may yield insights into the pathogenesis of PDD and VPD.
ESTHER : Zou_2018_Aging.Dis_9_51
PubMedSearch : Zou_2018_Aging.Dis_9_51
PubMedID: 29392081

Title : Discovery of a New Natural Product and a Deactivation of a Quorum Sensing System by Culturing a Producer Bacterium With a Heat-Killed Inducer Culture - Liang_2018_Front.Microbiol_9_3351
Author(s) : Liang L , Sproule A , Haltli B , Marchbank DH , Berrue F , Overy DP , McQuillan K , Lanteigne M , Duncan N , Correa H , Kerr RG
Ref : Front Microbiol , 9 :3351 , 2018
Abstract : Herein we describe a modified bacterial culture methodology as a tool to discover new natural products via supplementing actinomycete fermentation media with autoclaved cultures of "inducer" microbes. Using seven actinomycetes and four inducer microbes, we detected 28 metabolites that were induced in UHPLC-HRESIMS-based analysis of bacterial fermentations. Metabolomic analysis indicated that each inducer elicited a unique response from the actinomycetes and that some chemical responses were specific to each inducer-producer combination. Among these 28 metabolites, hydrazidomycin D, a new hydrazide-containing natural product was isolated from the pair Streptomyces sp. RKBH-B178 and Mycobacterium smegmatis. This result validated the effectiveness of the strategy in discovering new natural products. From the same set of induced metabolites, an in-depth investigation of a fermentation of Streptomyces sp. RKBH-B178 and autoclaved Pseudomonas aeruginosa led to the discovery of a glucuronidated analog of the pseudomonas quinolone signal (PQS). We demonstrated that RKBH-B178 is able to biotransform the P. aeruginosa quorum sensing molecules, 2-heptyl-4-quinolone (HHQ), and PQS to form PQS-GlcA. Further, PQS-GlcA was shown to have poor binding affinity to PqsR, the innate receptor of HHQ and PQS.
ESTHER : Liang_2018_Front.Microbiol_9_3351
PubMedSearch : Liang_2018_Front.Microbiol_9_3351
PubMedID: 30705672

Title : Pathogenicity of Isaria fumosorosea to Bemisia tabaci, with some observations on the fungal infection process and host immune response - Tian_2015_J.Invertebr.Pathol_130_147
Author(s) : Tian J , Diao H , Liang L , Hao C , Arthurs S , Ma R
Ref : J Invertebr Pathol , 130 :147 , 2015
Abstract : Isaria fumosorosea is an important pathogen of whiteflies, and is used as a mycoinsecticide against this pest in many regions of the world. We quantified the pathogenicity of the Chinese isolate IF-1106 against different life stages of sweetpotato whitefly, Bemisia tabaci, on cucumber plants, and describe the infection process and aspects of the host immunological response in the laboratory. The second instar was the most susceptible life stage to infection, with mortality rates at 10(7)conidia/ml approximately 83% after 7d. Scanning electron microscopy was used to monitor morphological aspects of the infection process. The following stages were observed; conidia adhered on the cuticle of B. tabaci and began to germinate within 6h of inoculation, appressoria development after 24h, germ tube penetration within 48h, emergent hyphae within 72h, secondary conidiogenesis within 96h with mass hyphal proliferation occurring on cadavers within 120h. The activities of endogenous enzymes were evaluated from host homogenate at various intervals post infection. Three enzymes associated with antioxidant activity [superoxide dismutase (SOD), perioxidase (POD), and catalase (CAT)], and two with detoxification [glutathione S-transferase (GSTs) and carboxylesterase (CarE)] were apparently upregulated in second instars infected by I. fumosorosea. Enzyme activities reached peak values at 48-60h post infection, then decreased to significantly lower than controls in 84h as mycosis occurred. Our results provide new insights into the pathogenicity and potential physiological response of B. tabaci to this fungal isolate.
ESTHER : Tian_2015_J.Invertebr.Pathol_130_147
PubMedSearch : Tian_2015_J.Invertebr.Pathol_130_147
PubMedID: 26264671

Title : Brain nicotinic acetylcholine receptor availability and response to smoking cessation treatment: a randomized trial - Brody_2014_JAMA.Psychiatry_71_797
Author(s) : Brody AL , Mukhin AG , Mamoun MS , Luu T , Neary M , Liang L , Shieh J , Sugar CA , Rose JE , Mandelkern MA
Ref : JAMA Psychiatry , 71 :797 , 2014
Abstract : IMPORTANCE: Cigarette smoking leads to upregulation of nicotinic acetylcholine receptors (nAChRs) in the human brain, including the common alpha4beta2* nAChR subtype. While subjective aspects of tobacco dependence have been extensively examined as predictors of quitting smoking with treatment, no studies to our knowledge have yet reported the relationship between the extent of pretreatment upregulation of nAChRs and smoking cessation. OBJECTIVE: To determine whether the degree of nAChR upregulation in smokers predicts quitting with a standard course of treatment. DESIGN, SETTING, AND PARTICIPANTS: Eighty-one tobacco-dependent cigarette smokers (volunteer sample) underwent positron emission tomographic (PET) scanning of the brain with the radiotracer 2-FA followed by 10 weeks of double-blind, placebo-controlled treatment with nicotine patch (random assignment). Pretreatment specific binding volume of distribution (VS/fP) on PET images (a value that is proportional to alpha4beta2* nAChR availability) was determined for 8 brain regions of interest, and participant-reported ratings of nicotine dependence, craving, and self-efficacy were collected. Relationships between these pretreatment measures, treatment type, and outcome were then determined. The study took place at academic PET and clinical research centers. MAIN OUTCOMES AND MEASURES: Posttreatment quit status after treatment, defined as a participant report of 7 or more days of continuous abstinence and an exhaled carbon monoxide level of 3 ppm or less.
RESULTS: Smokers with lower pretreatment VS/fP values (a potential marker of less severe nAChR upregulation) across all brain regions studied were more likely to quit smoking (multivariate analysis of covariance, F8,69 = 4.5; P < .001), regardless of treatment group assignment. Furthermore, pretreatment average VS/fP values provided additional predictive power for likelihood of quitting beyond the self-report measures (stepwise binary logistic regression, likelihood ratio chi21 = 19.8; P < .001). CONCLUSIONS AND RELEVANCE: Smokers with less upregulation of available alpha4beta2* nAChRs have a greater likelihood of quitting with treatment than smokers with more upregulation. In addition, the biological marker studied here provided additional predictive power beyond subjectively rated measures known to be associated with smoking cessation outcome. While the costly, time-consuming PET procedure used here is not likely to be used clinically, simpler methods for examining alpha4beta2* nAChR upregulation could be tested and applied in the future to help determine which smokers need more intensive and/or lengthier treatment. TRIAL REGISTRATION: Identifier: NCT01526005.
ESTHER : Brody_2014_JAMA.Psychiatry_71_797
PubMedSearch : Brody_2014_JAMA.Psychiatry_71_797
PubMedID: 24850280

Title : Synthesis and biological evaluation of a new series of ebselen derivatives as glutathione peroxidase (GPx) mimics and cholinesterase inhibitors against Alzheimer's disease - Luo_2014_Bioorg.Med.Chem_22_1355
Author(s) : Luo Z , Liang L , Sheng J , Pang Y , Li J , Huang L , Li X
Ref : Bioorganic & Medicinal Chemistry , 22 :1355 , 2014
Abstract : A series of ebselen derivatives were designed, synthesised and evaluated as inhibitors of cholinesterases (ChEs) and glutathione peroxidase (GPx) mimics. Most of the compounds were found to be potent against AChEs and BCHE, compounds 5e and 5i, proved to be the most potent against AChE with IC(5)(0) values of 0.76 and 0.46 muM, respectively. Among these hybrids, most of the compounds were found to be good GPx mimics compare with ebselen. The selected compounds 5e and 5i were also used to determine the catalytic parameters and in vitro hydrogen peroxide scavenging activity. The results indicate that compounds 5e and 5i may be excellent multifunctional agents for the treatment of AD.
ESTHER : Luo_2014_Bioorg.Med.Chem_22_1355
PubMedSearch : Luo_2014_Bioorg.Med.Chem_22_1355
PubMedID: 24461494

Title : Pemphigus vulgaris autoantibody profiling by proteomic technique - Kalantari-Dehaghi_2013_PLoS.One_8_e57587
Author(s) : Kalantari-Dehaghi M , Anhalt GJ , Camilleri MJ , Chernyavsky AI , Chun S , Felgner PL , Jasinskas A , Leiferman KM , Liang L , Marchenko S , Nakajima-Sasaki R , Pittelkow MR , Zone JJ , Grando SA
Ref : PLoS ONE , 8 :e57587 , 2013
Abstract : Pemphigus vulgaris (PV) is a mucocutaneous blistering disease characterized by IgG autoantibodies against the stratified squamous epithelium. Current understanding of PV pathophysiology does not explain the mechanism of acantholysis in patients lacking desmoglein antibodies, which justifies a search for novel targets of pemphigus autoimmunity. We tested 264 pemphigus and 138 normal control sera on the multiplexed protein array platform containing 701 human genes encompassing many known keratinocyte cell-surface molecules and members of protein families targeted by organ-non-specific PV antibodies. The top 10 antigens recognized by the majority of test patients' sera were proteins encoded by the DSC1, DSC3, ATP2C1, PKP3, CHRM3, COL21A1, ANXA8L1, CD88 and CHRNE genes. The most common combinations of target antigens included at least one of the adhesion molecules DSC1, DSC3 or PKP3 and/or the acetylcholine receptor CHRM3 or CHRNE with or without the MHC class II antigen DRA. To identify the PV antibodies most specific to the disease process, we sorted the data based on the ratio of patient to control frequencies of antigen recognition. The frequency of antigen recognition by patients that exceeded that of control by 10 and more times were the molecules encoded by the CD33, GP1BA, CHRND, SLC36A4, CD1B, CD32, CDH8, CDH9, PMP22 and HLA-E genes as well as mitochondrial proteins encoded by the NDUFS1, CYB5B, SOD2, PDHA1 and FH genes. The highest specificity to PV showed combinations of autoantibodies to the calcium pump encoded by ATP2C1 with C5a receptor plus DSC1 or DSC3 or HLA-DRA. The results identified new targets of pemphigus autoimmunity. Novel autoantibody signatures may help explain individual variations in disease severity and treatment response, and serve as sensitive and specific biomarkers for new diagnostic assays in PV patients.
ESTHER : Kalantari-Dehaghi_2013_PLoS.One_8_e57587
PubMedSearch : Kalantari-Dehaghi_2013_PLoS.One_8_e57587
PubMedID: 23505434

Title : Complete genome sequence of the bacterium Methylovorus sp. strain MP688, a high-level producer of pyrroloquinolone quinone - Xiong_2011_J.Bacteriol_193_1012
Author(s) : Xiong XH , Zhi JJ , Yang L , Wang JH , Zhao Y , Wang X , Cui YJ , Dong F , Li MX , Yang YX , Wei N , An JJ , Du BH , Liang L , Zhang JS , Zhou W , Cheng SF , He T , Wang L , Chen HP , Liu DS , Zhang WC
Ref : Journal of Bacteriology , 193 :1012 , 2011
Abstract : Methylotrophic bacteria are widespread microbes which can use one carbon compound as their only carbon and energy sources. Here we report the finished, annotated genome sequence of the methylotrophic bacterium Methylovorus sp. strain MP688, which was isolated from soil for high-level production of pyrroloquinolone quinone (PQQ) in our lab.
ESTHER : Xiong_2011_J.Bacteriol_193_1012
PubMedSearch : Xiong_2011_J.Bacteriol_193_1012
PubMedID: 21148725
Gene_locus related to this paper: mets6-e4qna9 , mets6-e4qnd9 , metsd-c6xa50

Title : Genomic and proteomic analyses of the fungus Arthrobotrys oligospora provide insights into nematode-trap formation - Yang_2011_PLoS.Pathog_7_e1002179
Author(s) : Yang J , Wang L , Ji X , Feng Y , Li X , Zou C , Xu J , Ren Y , Mi Q , Wu J , Liu S , Liu Y , Huang X , Wang H , Niu X , Li J , Liang L , Luo Y , Ji K , Zhou W , Yu Z , Li G , Li L , Qiao M , Feng L , Zhang KQ
Ref : PLoS Pathog , 7 :e1002179 , 2011
Abstract : Nematode-trapping fungi are "carnivorous" and attack their hosts using specialized trapping devices. The morphological development of these traps is the key indicator of their switch from saprophytic to predacious lifestyles. Here, the genome of the nematode-trapping fungus Arthrobotrys oligospora Fres. (ATCC24927) was reported. The genome contains 40.07 Mb assembled sequence with 11,479 predicted genes. Comparative analysis showed that A. oligospora shared many more genes with pathogenic fungi than with non-pathogenic fungi. Specifically, compared to several sequenced ascomycete fungi, the A. oligospora genome has a larger number of pathogenicity-related genes in the subtilisin, cellulase, cellobiohydrolase, and pectinesterase gene families. Searching against the pathogen-host interaction gene database identified 398 homologous genes involved in pathogenicity in other fungi. The analysis of repetitive sequences provided evidence for repeat-induced point mutations in A. oligospora. Proteomic and quantitative PCR (qPCR) analyses revealed that 90 genes were significantly up-regulated at the early stage of trap-formation by nematode extracts and most of these genes were involved in translation, amino acid metabolism, carbohydrate metabolism, cell wall and membrane biogenesis. Based on the combined genomic, proteomic and qPCR data, a model for the formation of nematode trapping device in this fungus was proposed. In this model, multiple fungal signal transduction pathways are activated by its nematode prey to further regulate downstream genes associated with diverse cellular processes such as energy metabolism, biosynthesis of the cell wall and adhesive proteins, cell division, glycerol accumulation and peroxisome biogenesis. This study will facilitate the identification of pathogenicity-related genes and provide a broad foundation for understanding the molecular and evolutionary mechanisms underlying fungi-nematodes interactions.
ESTHER : Yang_2011_PLoS.Pathog_7_e1002179
PubMedSearch : Yang_2011_PLoS.Pathog_7_e1002179
PubMedID: 21909256
Gene_locus related to this paper: artoa-g1wyr4 , artoa-g1x1a7 , artoa-g1x3f4 , artoa-g1x3h6 , artoa-g1x9s5 , artoa-g1x9z4 , artoa-g1xcb5 , artoa-g1xhl6 , artoa-g1xjb3 , artoa-g1xjy0 , artoa-g1xkw3 , artoa-g1xnf2 , artoa-g1xnf8 , artoa-g1xqd4 , artoa-g1xqt1 , artoa-g1xte8 , artoa-g1xu91 , artoa-g1xv59 , artoa-g1x382 , artoa-g1x3q3 , artoa-g1wxl5 , artoa-g1xj75 , artoa-g1xd25 , artoa-g1wzu7 , artoa-g1xt42 , artoa-g1xhm8 , artoa-g1wy43