Xie Q

References (33)

Title : Ganodermanontriol Suppresses the Progression of Lung Adenocarcinoma by Activating CES2 to Enhance the Metabolism of Mycophenolate Mofetil - Xie_2024_J.Microbiol.Biotechnol_34_249
Author(s) : Xie Q , Cao Z , You W , Cai X , Shen M , Yin Z , Jiang Y , Wang X , Ye S
Ref : J Microbiol Biotechnol , 34 :249 , 2024
Abstract : New anti-lung cancer therapies are urgently required to improve clinical outcomes. Since ganodermanontriol (GDNT) has been identified as a potential antineoplastic agent, its role in lung adenocarcinoma (LUAD) is investigated in this study. Concretely, lung cancer cells were treated with GDNT and/or mycophenolate mofetil (MMF), after which MTT assay, flow cytometry and Western blot were conducted. Following bioinformatics analysis, carboxylesterase 2 (CES2) was knocked down and rescue assays were carried out in vitro. Xenograft experiment was performed on mice, followed by drug administration, measurement of tumor growth and determination of CES2, IMPDH1 and IMPDH2 expressions. As a result, the viability of lung cancer cells was reduced by GDNT or MMF. GDNT enhanced the effects of MMF on suppressing viability, promoting apoptosis and inducing cell cycle arrest in lung cancer cells. GDNT up-regulated CES2 level, and strengthened the effects of MMF on down-regulating IMPDH1 and IMPDH2 levels in the cells. IMPDH1 and IMPDH2 were highly expressed in LUAD samples. CES2 was a potential target for GDNT. CES2 knockdown reversed the synergistic effect of GDNT and MMF against lung cancer in vitro. GDNT potentiated the role of MMF in inhibiting tumor growth and expressions of CES2 and IMPDH1/2 in lung cancer in vivo. Collectively, GDNT suppresses the progression of LUAD by activating CES2 to enhance the metabolism of MMF.
ESTHER : Xie_2024_J.Microbiol.Biotechnol_34_249
PubMedSearch : Xie_2024_J.Microbiol.Biotechnol_34_249
PubMedID: 38419324

Title : Lipoprotein-associated phospholipase A2 predicts cardiovascular death in patients on maintenance hemodialysis: a 7-year prospective cohort study - Lin_2024_Lipids.Health.Dis_23_15
Author(s) : Lin L , Teng J , Shi Y , Xie Q , Shen B , Xiang F , Cao X , Ding X , Xu X , Zhang Z
Ref : Lipids Health Dis , 23 :15 , 2024
Abstract : BACKGROUND: Cardiovascular diseases (CVD) is the leading cause of death among maintenance hemodialysis patients, with dyslipidemia being a prevalent complication. The paradoxical relationship between cardiovascular outcomes and established lipid risk markers, such as low-density lipoprotein cholesterol (LDL-C), complicates lipid management in this population. This study investigated Lipoprotein-associated phospholipase A2 (Lp-PLA2), an emerging biomarker known for its proinflammatory and proatherogenic properties, as a potential cardiovascular prognostic marker in this cohort. In this context, the association between Lp-PLA2 levels and cardiovascular outcomes was evaluated, with the aim to facilitate more accurate stratification and identification of high-risk individuals. METHODS: From August 2013 to January 2014, 361 hemodialysis patients were prospectively enrolled. Lp-PLA(2) activity and laboratory measures at baseline were quantified. Comorbidities and medications were recorded. All patients were followed until the end of April, 2022. The individual and combined effects of Lp-PLA(2) activity and LDL-C on patient outcomes were examined. The association between Lp-PLA(2) activity and all-cause mortality, cardiovascular mortality, and major adverse cardiovascular events (MACEs) was analyzed. RESULTS: The median Lp-PLA(2) activity was 481.2 U/L. In subjects with Lp-PLA(2) activity over 481.2 U/L, significantly higher total cholesterol (4.89 vs. 3.98 mmol/L; P < 0.001), LDL-C (3.06 vs. 2.22 mmol/L; P < 0.001), and apolipoprotein B (0.95 vs. 0.75 mmol/L; P < 0.001) were observed. Over a median follow-up of 78.1 months, 182 patients died, with 77 cases identified as cardiovascular death, 88 MACEs happened. Cardiovascular mortality and MACEs, but not all-cause mortality, were significantly increased in the high Lp-PLA2 group. Cox regression analyses showed that high Lp-PLA(2) activity was associated with cardiovascular mortality and MACE occurrence. After comprehensive adjustment, high Lp-PLA(2) activity was independently associated with cardiovascular mortality(as a dichotomous variable: HR:2.57, 95%CI:1.58,4.18, P < 0.001; as a continuous variable: HR:1.25, 95%CI:1.10,1.41, P = 0.001) and MACEs(as a dichotomous variable: HR:2.17, 95%CI:1.39,3.40, P = 0.001; as a continuous variable: HR:1.20, 95%CI:1.07,1.36, P = 0.002). When participants were grouped by median Lp-PLA2 activity and LDL-C values, those with high Lp-PLA(2) and low LDL-C had the highest CV mortality. The addition of Lp-PLA2 significantly improved reclassification (as a dichotomous variable NRI = 42.51%, 95%CI: 5.0%,61.33%; as a continuous variable, NRI = 33.32%, 95% CI: 7.47%,56.21%). CONCLUSIONS: High Lp-PLA(2) activity is an independent risk factor for cardiovascular mortality and MACEs occurrence in patients on hemodialysis. The combined measures of Lp-PLA(2) and LDL-C help to identify individuals with a higher risk of cardiovascular death.
ESTHER : Lin_2024_Lipids.Health.Dis_23_15
PubMedSearch : Lin_2024_Lipids.Health.Dis_23_15
PubMedID: 38216940

Title : Biotransformation of HBCDs by the microbial communities enriched from mangrove sediments - Yu_2024_J.Hazard.Mater_469_134036
Author(s) : Yu F , Zhang B , Liu Y , Luo W , Chen H , Gao J , Ye X , Li J , Xie Q , Peng T , Wang H , Huang T , Hu Z
Ref : J Hazard Mater , 469 :134036 , 2024
Abstract : 1,2,5,6,9,10-Hexabromocyclododecanes (HBCDs) are a sort of persistent organic pollutants (POPs). This research investigated 12 microbial communities enriched from sediments of four mangroves in China to transform HBCDs. Six microbial communities gained high transformation rates (27.5-97.7%) after 12 generations of serial transfer. Bacteria were the main contributors to transform HBCDs rather than fungi. Analyses on the bacterial compositions and binning genomes showed that Alcanivorax (55.246-84.942%) harboring haloalkane dehalogenase genes dadAH and dadBH dominated the microbial communities with high transformation rates. Moreover, expressions of dadAH and dadBH in the microbial communities and Alcanivorax isolate could be induced by HBCDs. Further, it was found that purified proteins DadAH and DadBH showed high conversion rates on HBCDs in 36 h (91.9 +/- 7.4 and 101.0 +/- 1.8%, respectively). The engineered Escherichia coli BL21 strains harbored two genes could convert 5.7 +/- 0.4 and 35.1 +/- 0.1% HBCDs, respectively, lower than their cell-free crude extracts (61.2 +/- 5.2 and 56.5 +/- 8.7%, respectively). The diastereoisomer-specific transforming trend by both microbial communities and enzymes were gamma- > alpha- > beta-HBCD, differed from alpha- > beta- > gamma-HBCD by the Alcanivorax isolate. The identified transformation products indicated that HBCDs were dehalogenated via HBr elimination (dehydrobromination), hydrolytic and reductive debromination pathways in the enriched cultures. Two enzymes converted HBCDs via hydrolytic debromination. The present research provided theoretical bases for the biotransformation of HBCDs by microbial community and the bioremediation of HBCDs contamination in the environment.
ESTHER : Yu_2024_J.Hazard.Mater_469_134036
PubMedSearch : Yu_2024_J.Hazard.Mater_469_134036
PubMedID: 38493623

Title : Ameliorative effect of scopolamine-induced cognitive dysfunction by Fufangmuniziqi formula: The roles of alkaloids, saponins, and flavonoids - Zhao_2023_J.Ethnopharmacol__116792
Author(s) : Zhao X , Hu X , Xie Q , Qi S , Xiang Z , Sun X , Xie Z , Dang R , Zhou L , Liu W , Cheng X , Wang C
Ref : J Ethnopharmacol , :116792 , 2023
Abstract : ETHNOPHARMACOLOGICAL RELEVANCE: Fufangmuniziqi formula (FFMN), a traditional Uyghur medicine used in China, is derived from an ancient Uyghur medical book and consists of 13 herbs. The herbs of FFMN, such as Peganum harmala L., Glycyrrhiza uralensis Fisch., and Nigella glandulifera, have been demonstrated to have acetylcholinesterase (AChE) inhibitory, anti-neuroinflammatory, or antioxidant effects. Therefore, FFMN may have a good anti-Alzheimer's disease (AD) effect, but its specific action and mechanism need to be further proven. AIM OF THE STUDY: This study aims to investigate the anti-AD effects of FFMN and the role played by alkaloids, flavonoids, and saponins in anti-AD. MATERIALS AND METHODS: The alkaloids, flavonoids, and saponins fractions of FFMN were prepared by macroporous resin chromatography. The absorbed ingredients in the drug-containing serum were identified by UPLC-Q-TOF-MS. An AD mouse model was established by intraperitoneal injection of scopolamine (SCO). The role of different fractions of FFMN in the anti-AD process was examined by Morris water maze (MWM), in-vitro cell, and AChE inhibition assay. RESULTS: A total of 20 ingredients were identified in the serum samples collected after oral administration of FFMN, and seven compounds were selected as candidate active compounds. MWM experiments showed that different fractions of FFMN could significantly improve SCO-induced learning memory impairment in mice. The alkaloids fraction (ALK) regulated cholinergic function by inhibiting AChE activity, activating choline acetyltransferase activity, and protein expression. Flavonoids and saponins were more potent than the ALK in downregulating pro-inflammatory factors or inflammatory mediators, such as TNF-alpha, MPO, and nitric oxide. Western blot results further confirmed that flavonoids and saponins attenuated neuroinflammation by inhibiting the phosphorylation of IkappaB and NF-kappaB p65. This result was also verified by in-vitro cellular assays. FFMN enhanced antioxidant defense by increasing the activity of superoxide dismutase and reducing the production of MDA. Combined with cellular experiments, flavonoids and saponins were proven more protective against oxidative damage. CONCLUSION: FFMN improved cognitive and memory impairment in the SCO-induced AD mouse model. ALK mainly enhanced the function of the cholinergic system. Flavonoid and saponin fractions mainly attenuated neuroinflammation and oxidative stress by modulating the NF-kappaB pathway. All these findings strongly suggested that the combination of alkaloid, flavonoid, and saponin fractions derived from FFMN is a promising anti-AD agent that deserves further development.
ESTHER : Zhao_2023_J.Ethnopharmacol__116792
PubMedSearch : Zhao_2023_J.Ethnopharmacol__116792
PubMedID: 37356745

Title : Efficient decolorization of melanoidin in raw molasses wastewater by thermophilic esterase in actual extreme conditions - Zhang_2023_Bioresour.Technol_382_129191
Author(s) : Zhang Z , Hu W , Xie Q , Shi Y , Zhao Y , Deng Y , He J , Wu X , Zhang Y , Zhang W , Liu P , Yang H , Wang W
Ref : Bioresour Technol , 382 :129191 , 2023
Abstract : This work was developed to explore the versatility of thermophilic esterase for decolorizing raw molasses wastewater at high temperature and acidic pH. Combining covalent crosslinking method with deep eutectic solvent, a thermophilic esterase from Pyrobaculum calidifontis was immobilized on chitosan/macroporous resin composite carrier. The application of this immobilized thermophilic esterase eliminated 92.35% of colorants in raw molasses wastewater, achieving maximal decolorization efficiency across all the enzymes tested. Strikingly, this immobilized thermophilic esterase was capable of engaging in continuous activity for a 5-day period while removing 76.23% of pigments from samples. It effectively and continuously eliminated BOD(5) and COD, effectively and directly facilitating raw molasses wastewater decolorization under extreme conditions more readily than control group. In addition, this thermophilic esterase was believed to achieve decolorization through an addition reaction that disrupted conjugated system of melanoidins. Together, these results highlight an efficient and practical means of achieving enzyme-based molasses wastewater decolorization.
ESTHER : Zhang_2023_Bioresour.Technol_382_129191
PubMedSearch : Zhang_2023_Bioresour.Technol_382_129191
PubMedID: 37196742

Title : Identification, evolution, and expression of GDSL-type Esterase\/Lipase (GELP) gene family in three cotton species: a bioinformatic analysis - Duan_2023_BMC.Genomics_24_795
Author(s) : Duan L , Wang F , Shen H , Xie S , Chen X , Xie Q , Li R , Cao A , Li H
Ref : BMC Genomics , 24 :795 , 2023
Abstract : BACKGROUND: GDSL esterase/lipases (GELPs) play important roles in plant growth, development, and response to biotic and abiotic stresses. Presently, an extensive and in-depth analysis of GELP family genes in cotton is still not clear enough, which greatly limits the further understanding of cotton GELP function and regulatory mechanism. RESULTS: A total of 389 GELP family genes were identified in three cotton species of Gossypium hirsutum (193), G. arboreum (97), and G. raimondii (99). These GELPs could be classified into three groups and eight subgroups, with the GELPs in same group to have similar gene structures and conserved motifs. Evolutionary event analysis showed that the GELP family genes tend to be diversified at the spatial dimension and certain conservative at the time dimension, with a trend of potential continuous expansion in the future. The orthologous or paralogous GELPs among different genomes/subgenomes indicated the inheritance from genome-wide duplication during polyploidization, and the paralogous GELPs were derived from chromosomal segment duplication or tandem replication. GELP genes in the A/D subgenome underwent at least three large-scale replication events in the evolutionary process during the period of 0.6-3.2 MYA, with two large-scale evolutionary events between 0.6-1.8 MYA that were associated with tetraploidization, and the large-scale duplication between 2.6-9.1 MYA that occurred during diploidization. The cotton GELPs indicated diverse expression patterns in tissue development, ovule and fiber growth, and in response to biotic and abiotic stresses, combining the existing cis-elements in the promoter regions, suggesting the GELPs involvements of functions to be diversification and of the mechanisms to be a hormone-mediated manner. CONCLUSIONS: Our results provide a systematic and comprehensive understanding the function and regulatory mechanism of cotton GELP family, and offer an effective reference for in-depth genetic improvement utilization of cotton GELPs.
ESTHER : Duan_2023_BMC.Genomics_24_795
PubMedSearch : Duan_2023_BMC.Genomics_24_795
PubMedID: 38129780

Title : Effects and mechanism of extracts rich in phenylpropanoids-polyacetylenes and polysaccharides from Codonopsis Radix on improving scopolamine-induced memory impairment of mice - Xie_2023_J.Ethnopharmacol__117106
Author(s) : Xie Q , Hu X , Zhao X , Xiang Z , Chen Q , Xie Z , Wang H , Zhao Y , Cheng X , Wang C
Ref : J Ethnopharmacol , :117106 , 2023
Abstract : ETHNOPHARMACOLOGICAL RELEVANCE: Alzheimer's disease (AD) is a progressive developmental neurodegenerative disease that primarily develops in old age. Memory impairment is an important manifestation of AD. It has been demonstrated that inflammation and oxidative stress are important mediators in the development and progression of AD. Codonopsis Radix (CR) has a long history of consumption, exhibiting lots of beneficial health effects, including anti-ageing, antioxidant, and anti-inflammatory properties. However, studies on the effects of CR on scopolamine-induced amnesia have rarely been reported. AIM OF THE STUDY: The aim of this study was to investigate the ameliorative effect of macromolecular portion (polysaccharides, POL) and small molecule portion (fine extract rich in phenylpropanoids-polyacetylenes, EPP) from CR on improving scopolamine-induced memory impairment and to elucidate the potential mechanism of action. MATERIALS AND METHODS: C57BL/6 mice were pretreated with EPP (0.2, 0.4, and 0.6 g/kg), POL (0.3, 0.6, and 0.9 g/kg), and donepezil (5 mg/kg) by gavage for 7 days, followed by intraperitoneal injection of scopolamine (1 mg/kg) to induce memory impairment. The 16S rRNA gene sequencing, histopathological, western blotting, and biochemical analysis (various biochemical markers and protein expressions related to cholinergic system, oxidative stress, and neuroinflammation) were performed to further elucidate the mechanism of action. Moreover, the acetylcholinesterase (AChE) inhibitory activities of POL, EPP, and its main compounds tangshenoside I, lobetyol, lobetyolin, and lobetyolinin were evaluated. RESULTS: Experiments have confirmed that both POL and EPP from CR could improve scopolamine-induced spatial learning memory deficits. Both of them could regulate cholinergic function by inhibiting AChE and activating choline acetyltransferase (ChAT) activities. They also could enhance antioxidant defense via increasing the activities of superoxide dismutase and glutathione peroxidase, and anti-inflammatory function through suppressing inflammatory factors (nitric oxide, TNF-alpha, and IL-6) and regulating gut flora. Besides, in vitro experiments demonstrated that four monomeric compounds and EPP, except POL, exhibited inhibition of AChE activity. CONCLUSION: EPP and POL from CR exert a beneficial effect on learning and memory processes in mice with scopolamine-induced memory impairment. CR may be a promising medicine for preventing and improving learning memory.
ESTHER : Xie_2023_J.Ethnopharmacol__117106
PubMedSearch : Xie_2023_J.Ethnopharmacol__117106
PubMedID: 37652198

Title : Alveolar macrophage-derived gVPLA2 promotes ventilator-induced lung injury via the cPLA2\/PGE2 pathway - Han_2023_BMC.Pulm.Med_23_494
Author(s) : Han H , Xie Q , Shao R , Li J , Du X
Ref : BMC Pulm Med , 23 :494 , 2023
Abstract : BACKGROUND: Ventilator-induced lung injury (VILI) is a clinical complication of mechanical ventilation observed in patients with acute respiratory distress syndrome. It is characterized by inflammation mediated by inflammatory cells and their secreted mediators. METHODS: To investigate the mechanisms underlying VILI, a C57BL/6J mouse model was induced using high tidal volume (HTV) mechanical ventilation. Mice were pretreated with Clodronate liposomes to deplete alveolar macrophages or administered normal bone marrow-derived macrophages or Group V phospholipase A2 (gVPLA2) intratracheally to inhibit bone marrow-derived macrophages. Lung tissue and bronchoalveolar lavage fluid (BALF) were collected to assess lung injury and measure Ca2+ concentration, gVPLA2, downstream phosphorylated cytoplasmic phospholipase A2 (p-cPLA2), prostaglandin E2 (PGE2), protein expression related to mitochondrial dynamics and mitochondrial damage. Cellular experiments were performed to complement the animal studies. RESULTS: Depletion of alveolar macrophages attenuated HTV-induced lung injury and reduced gVPLA2 levels in alveolar lavage fluid. Similarly, inhibition of alveolar macrophage-derived gVPLA2 had a similar effect. Activation of the cPLA2/PGE2/Ca2 + pathway in alveolar epithelial cells by gVPLA2 derived from alveolar macrophages led to disturbances in mitochondrial dynamics and mitochondrial dysfunction. The findings from cellular experiments were consistent with those of animal experiments. CONCLUSIONS: HTV mechanical ventilation induces the secretion of gVPLA2 by alveolar macrophages, which activates the cPLA2/PGE2/Ca2 + pathway, resulting in mitochondrial dysfunction. These findings provide insights into the pathogenesis of VILI and may contribute to the development of therapeutic strategies for preventing or treating VILI.
ESTHER : Han_2023_BMC.Pulm.Med_23_494
PubMedSearch : Han_2023_BMC.Pulm.Med_23_494
PubMedID: 38057837

Title : Expression, characterization, and immobilization of a novel SGNH esterase Est882 and its potential for pyrethroid degradation - Zong_2022_Front.Microbiol_13_1069754
Author(s) : Zong W , Su W , Xie Q , Gu Q , Deng X , Ren Y , Li H
Ref : Front Microbiol , 13 :1069754 , 2022
Abstract : The widely-used pyrethroid pesticides have attracted public attention because of their potentials to cause environmental pollution and toxic effects on non-target organisms. Esterase is a kind of hydrolytic enzyme that can catalyze the cleavage or formation of ester bonds. it plays a pivotal role in the decomposition of pyrethroids and esters containing industrial pollutants through the hydrolysis of ester bonds. Here, a new esterase gene est882 was successfully screened, which encodes Est882, a SGNH family esterase composed of 294 amino acids. It was heterogeneously expressed, identified and immobilized. Multiple sequence alignment showed that Est882 had a typical GDS(X) conserved motif and a catalytic triad composed of Ser79, Asp269 and His275. Phylogenetic analysis showed that Est882 shall belong to a new esterase family. Biochemical characterization demonstrated that the optimum condition was 40 degreesC and pH 9.0. Est882 immobilization was studied with mesoporous silica SBA-15 as the carrier and found to significantly improve the tolerance and stability of Est882. Its optimum pH increased to 10.0 and stabilized within pH 8.0-11.0. Free Est882 can effectively degrade various pyrethroids within 30 min, with a degradation rate above 80%. The immobilized Est882 yet degraded more than 70% of pyrethroids within 30 min. The present study indicated that Est882 has outstanding potential in bioremediation of a pyrethroid-polluted environment. These characteristics endow Est882 with potential values in various industrial applications and hydrolysis of pyrethroid residues.
ESTHER : Zong_2022_Front.Microbiol_13_1069754
PubMedSearch : Zong_2022_Front.Microbiol_13_1069754
PubMedID: 36620037

Title : Identification, characterization and mRNA transcript abundance profiles of the carboxylesterase (CXE5) gene in Eriocheir sinensis suggest that it may play a role in methyl farnesoate degradation - Li_2021_Comp.Biochem.Physiol.B.Biochem.Mol.Biol__110630
Author(s) : Li X , Chen T , Xu R , Huang M , Huang J , Xie Q , Liu F , Su S , Ma K
Ref : Comparative Biochemistry & Physiology B Biochem Mol Biol , :110630 , 2021
Abstract : The sesquiterpenoid methyl farnesoate (MF) is a de-epoxidized form of insect juvenile hormone (JH) III in crustaceans, and its precise titer plays important roles in regulating many critical physiological processes, including reproduction and ovarian maturation. Understanding the synthetic and degradation pathways of MF is equally important for determining how to maintain MF titers at appropriate levels and thus for potential applications in crab aquaculture. Although the synthetic pathway of MF has been well established, little is known about MF degradation. Previous research proposed that specific carboxylesterases (CXEs) that degrade MF in crustaceans are conserved from those of JH III. In this study, we identified a novel Es-CXE5 gene from Eriocheir sinensis. The Es-CXE5 protein contains some conserved motifs, including catalytic triad and oxyanion hole, which are characteristics of the biologically active CXE family. The phylogenetic analysis showed that Es-CXE5 belongs to the hormone/semiochemical processing group of the CXE family. Moreover, Tissue and stage-specific expression results suggested that Es-CXE5 expression in hepatopancreas was highest and associated with the hemolymph MF titer. Furthermore, Es-CXE5 mRNA transcripts were detected in both in vitro and in vivo experiments and ESA experiment in the hepatopancreas and ovary. The results of this study showed that Es-CXE5 mRNA abundance in the hepatopancreas was notably induced by MF addition but had no effect on the ovary. Taken together, our results suggest that Es-CXE5 may degrade MF in the hepatopancreas and may thus be involved in ovarian development in E. sinensis.
ESTHER : Li_2021_Comp.Biochem.Physiol.B.Biochem.Mol.Biol__110630
PubMedSearch : Li_2021_Comp.Biochem.Physiol.B.Biochem.Mol.Biol__110630
PubMedID: 34062270
Gene_locus related to this paper: erisi-a0a7d5ly28

Title : An ABHD17-like hydrolase screening system to identify de-S-acylation enzymes of protein substrates in plant cells - Liu_2021_Plant.Cell__
Author(s) : Liu X , Li M , Li Y , Chen Z , Zhuge C , Ouyang Y , Zhao Y , Lin Y , Xie Q , Yang C , Lai J
Ref : Plant Cell , : , 2021
Abstract : Protein S-acylation is an important post-translational modification in eukaryotes, regulating the subcellular localization, trafficking, stability, and activity of substrate proteins. The dynamic regulation of this reversible modification is mediated inversely by protein S-acyltransferases and de-S-acylation enzymes, but the de-S-acylation mechanism remains unclear in plant cells. Here we characterized a group of putative protein de-S-acylation enzymes in Arabidopsis thaliana, including 11 members of ABHD17 (Alpha/Beta Hydrolase Domain-containing Protein 17)-like Acyl Protein Thioesterases (ABAPTs). A robust system was then established for the screening of de-S-acylation enzymes of protein substrates in plant cells, based on the effects of substrate localization and confirmed via the protein S-acylation levels. Using this system, the ABAPTs, which specifically reduced the S-acylation levels and disrupted the plasma membrane localization of five immunity-related proteins, were identified respectively in Arabidopsis. Further results indicated that the de-S-acylation of RIN4 (RPM1 Interacting Protein 4), which was mediated by ABAPT8, resulted in an increase of cell death in Arabidopsis and Nicotiana benthamiana, supporting the physiological role of the ABAPTs in plants. Collectively, our current work provides a powerful and reliable system to identify the pairs of plant protein substrates and de-S-acylation enzymes for further studies on the dynamic regulation of plant protein S-acylation.
ESTHER : Liu_2021_Plant.Cell__
PubMedSearch : Liu_2021_Plant.Cell__
PubMedID: 34338800
Gene_locus related to this paper: arath-AT1G66900 , arath-AT2G24320 , arath-AT4G31020 , arath-AT5G20520 , arath-AT5G38220 , arath-F3C3.3 , arath-AT1G13610 , arath-At5g14390 , arath-F22K18.40 , arath-At3g01690 , arath-Q9LI62

Title : Selenoprotein F knockout leads to glucose and lipid metabolism disorders in mice - Zheng_2020_J.Biol.Inorg.Chem_25_1009
Author(s) : Zheng X , Ren B , Li X , Yan H , Xie Q , Liu H , Zhou J , Tian J , Huang K
Ref : J Biol Inorg Chem , 25 :1009 , 2020
Abstract : Selenoprotein F (Selenof), an endoplasmic reticulum (ER)-resident protein, is considered to be involved in glycoprotein folding and quality control in the ER. However, its function has not yet been thoroughly addressed. In this study, proteomics analysis revealed that Selenof deficiency in mice led to the differential expression of hepatic proteins associated with glucose and lipid metabolism. The phenotype analysis revealed that Selenof knockout mice showed glucose intolerance and insulin reduction, even with a normal diet. Additionally, Selenof knockout exacerbated high-fat diet-induced obesity, hyperglycemia, glucose intolerance, and hepatic steatosis. Furthermore, lipoprotein lipase and carboxylesterase 1D, two glycoproteins involved in lipid metabolism, were significantly decreased in the liver of Selenof knockout mice with a normal or high-fat diet. Collectively, these findings suggested that Selenof deficiency might cause the perturbation of glycoprotein quality control and thus contribute to glucose and lipid metabolism disorders, implying a novel biological function of Selenof.
ESTHER : Zheng_2020_J.Biol.Inorg.Chem_25_1009
PubMedSearch : Zheng_2020_J.Biol.Inorg.Chem_25_1009
PubMedID: 32995962

Title : Effects of BIS-MEP on Reversing Amyloid Plaque Deposition and Spatial Learning and Memory Impairments in a Mouse Model of beta-Amyloid Peptide- and Ibotenic Acid-Induced Alzheimer's Disease - Wang_2019_Front.Aging.Neurosci_11_3
Author(s) : Wang Y , Xia J , Shen M , Zhou Y , Wu Z , Shi Y , Xu J , Hou L , Zhang R , Qiu Z , Xie Q , Chen H , Zhang Y , Wang H
Ref : Front Aging Neurosci , 11 :3 , 2019
Abstract : Alzheimer's disease (AD) is the main type of dementia and is characterized by progressive memory loss and a notable decrease in cholinergic neuron activity. As classic drugs currently used in the clinic, acetylcholinesterase inhibitors (AChEIs) restore acetylcholine levels and relieve the symptoms of AD, but are insufficient at delaying the onset of AD. Based on the multi-target-directed ligand (MTDL) strategy, bis-(-)-nor-meptazinol (BIS-MEP) was developed as a multi-target AChEI that mainly targets AChE catalysis and the beta-amyloid (Abeta) aggregation process. In this study, we bilaterally injected Abeta oligomers and ibotenic acid (IBO) into the hippocampus of ICR mice and then subcutaneously injected mice with BIS-MEP to investigate its therapeutic effects and underlying mechanisms. According to the results from the Morris water maze test, BIS-MEP significantly improved the spatial learning and memory impairments in AD model mice. Compared with the vehicle control, the BIS-MEP treatment obviously inhibited the AChE activity in the mouse brain, consistent with the findings from the behavioral tests. The BIS-MEP treatment also significantly reduced the Abeta plaque area in both the hippocampus and cortex, suggesting that BIS-MEP represents a direct intervention for AD pathology. Additionally, the immunohistochemistry and ELISA results revealed that microglia (ionized calcium-binding adapter molecule 1, IBA1) and astrocyte (Glial fibrillary acidic protein, GFAP) activation and the secretion of relevant inflammatory factors (TNFalpha and IL-6) induced by Abeta were decreased by the BIS-MEP treatment. Furthermore, BIS-MEP showed more advantages than donepezil (an approved AChEI) as an Abeta intervention. Based on our findings, BIS-MEP improved spatial learning and memory deficits in AD mice by regulating acetylcholinesterase activity, Abeta deposition and the inflammatory response in the brain.
ESTHER : Wang_2019_Front.Aging.Neurosci_11_3
PubMedSearch : Wang_2019_Front.Aging.Neurosci_11_3
PubMedID: 30723404

Title : Bio-\/Nanoimmobilization Platform Based on Bioinspired Fibrin-Bone@Polydopamine-Shell Adhesive Composites for Biosensing - Zhang_2019_ACS.Appl.Mater.Interfaces_11_47311
Author(s) : Zhang L , Liu Z , Zha S , Liu G , Zhu W , Xie Q , Li Y , Ying Y , Fu Y
Ref : ACS Appl Mater Interfaces , 11 :47311 , 2019
Abstract : Inspired by blood coagulation and mussel adhesion, we report novel adhesive fibrin-bone@polydopamine (PDA)-shell composite matrix as highly efficient immobilization platform for biomacromolecules and nanomaterials. Fibrin, as a bioglue, and PDA, as a chemical adhesive, are integrated in a one-pot simultaneous polymerization consisting of biopolymerization of fibrinogen and chemical polymerization of dopamine. Fibrin fibers act as adhesive bones to construct scaffold, while PDA coat on the scaffold to form adhesive shell, generating 3D porous composite matrix with unique bone@shell structure. Two types of enzymes (glucose oxidase and acetylcholinesterase) and Au nanoparticles were adopted as respective model biomolecules and nanomaterials to investigate the immobilization capability of the matrix. The bionanocomposites showed high efficiency in capturing nanoparticles and enzymes, as well as significant mass-transfer and biocatalysis efficiencies. Therefore, the bionanocomposites exhibited significant potential in biosensing of glucose and paraoxon with limits of detection down to 5.2 muM and 4 ppt, respectively. The biological-chemical-combined polymerization strategy and composite platform with high immobilization capacity and mass-transfer efficiency open up a novel way for the preparation of high-performance bionanocomposites for various applications, in particular, biosensing.
ESTHER : Zhang_2019_ACS.Appl.Mater.Interfaces_11_47311
PubMedSearch : Zhang_2019_ACS.Appl.Mater.Interfaces_11_47311
PubMedID: 31742992

Title : NLGN3 promotes neuroblastoma cell proliferation and growth through activating PI3K\/AKT pathway - Li_2019_Eur.J.Pharmacol__172423
Author(s) : Li Z , Gao W , Fei Y , Gao P , Xie Q , Xie J , Xu Z
Ref : European Journal of Pharmacology , :172423 , 2019
Abstract : Neuroblastoma is the most common extracranial solid tumor of childhood, previous studies show synaptic protein neuroligin-3 (NLGN3) promotes glioma proliferation and growth, However, no investigation about the role of NLGN3 in neuroblastoma was reported. Here, we found NGLGN3 was significantly upregulated in neuroblastoma cells and tissues, its overexpression significantly promoted neuroblastoma cell proliferation and growth determined by MTT analysis, colony formation assay, cell cycle progression analysis, BrdU incorporation assay and animal model, while its knockdown inhibited cell proliferation and growth. Then we found NLGN3 could increase the phosphorylation level of AKT and the transcription activity of FOXO family, suggesting NLGN3 activated PI3K/AKT pathway, inhibition of PI3K/AKT pathway in NLGN3 overexpressing cells inhibited cell proliferation, confirming NLGN3 promoted neuroblastoma proliferation through activating PI3K/AKT pathway. In summary, we found NLGN3 promoted neuroblastoma cell proliferation and growth through activating PI3K/AKT pathway and providing a new target for neuroblastoma therapy.
ESTHER : Li_2019_Eur.J.Pharmacol__172423
PubMedSearch : Li_2019_Eur.J.Pharmacol__172423
PubMedID: 31150649

Title : Bis(9)-(-)-Meptazinol, a novel dual-binding AChE inhibitor, rescues cognitive deficits and pathological changes in APP\/PS1 transgenic mice - Shi_2018_Transl.Neurodegener_7_21
Author(s) : Shi Y , Huang W , Wang Y , Zhang R , Hou L , Xu J , Qiu Z , Xie Q , Chen H , Zhang Y , Wang H
Ref : Transl Neurodegener , 7 :21 , 2018
Abstract : Background: Alzheimer's disease (AD) is a progressive and irreversible neurodegenerative brain disorder, which is the most common form of dementia. Intensive efforts have been made to find effective and safe treatment against AD. Acetylcholinesterase inhibitors (AChEIs) have been widely used for the treatment of mild to moderate AD. In this study, we investigated the effect of Bis(9)-(-)-Meptazinol (B9M), a novel potential dual-binding acetylcholinesterase (AChE) inhibitor, on learning and memory abilities, as well as the underlying mechanism in the APP/PS1 mouse model of AD. Methods: B9M (0.1 mug/kg, 0.3 mug/kg, and 1 mug/kg) was administered by subcutaneous injection into eight-month-old APP/PS1 transgenic mice for four weeks. Morris water maze, nest-building and novel object recognition were used to examine learning and memory ability. Abeta levels and Abeta plaque were evaluated by ELISA and immunochemistry. Results: Our results showed that chronic treatment with B9M significantly improved the cognitive function of APP/PS1 transgenic mice in the Morris water maze test, nest-building test and novel object recognition test. Moreover, B9M improved cognitive deficits in APP/PS1 mice by a mechanism that may be associated with its inhibition of the AChE activity, Abeta plaque burden, levels of Abeta and the consequent activation of astrocytes and microglia in the brain of APP/PS1 transgenic mice. Most of important, the most effective dose of B9M in the present study is 1 mug/kg, which is one thousand of the dosage of Donepezil acted as the control treatment. Furthermore, B9M reduced Abeta plaque burden better than Donepezil. Conclusion: These results indicate that B9M appears to have potential as an effective AChE inhibitor for the treatment of AD with symptom-relieving and disease-modifying properties.
ESTHER : Shi_2018_Transl.Neurodegener_7_21
PubMedSearch : Shi_2018_Transl.Neurodegener_7_21
PubMedID: 30237878

Title : Hemimetabolous genomes reveal molecular basis of termite eusociality - Harrison_2018_Nat.Ecol.Evol_2_557
Author(s) : Harrison MC , Jongepier E , Robertson HM , Arning N , Bitard-Feildel T , Chao H , Childers CP , Dinh H , Doddapaneni H , Dugan S , Gowin J , Greiner C , Han Y , Hu H , Hughes DST , Huylmans AK , Kemena C , Kremer LPM , Lee SL , Lopez-Ezquerra A , Mallet L , Monroy-Kuhn JM , Moser A , Murali SC , Muzny DM , Otani S , Piulachs MD , Poelchau M , Qu J , Schaub F , Wada-Katsumata A , Worley KC , Xie Q , Ylla G , Poulsen M , Gibbs RA , Schal C , Richards S , Belles X , Korb J , Bornberg-Bauer E
Ref : Nat Ecol Evol , 2 :557 , 2018
Abstract : Around 150 million years ago, eusocial termites evolved from within the cockroaches, 50 million years before eusocial Hymenoptera, such as bees and ants, appeared. Here, we report the 2-Gb genome of the German cockroach, Blattella germanica, and the 1.3-Gb genome of the drywood termite Cryptotermes secundus. We show evolutionary signatures of termite eusociality by comparing the genomes and transcriptomes of three termites and the cockroach against the background of 16 other eusocial and non-eusocial insects. Dramatic adaptive changes in genes underlying the production and perception of pheromones confirm the importance of chemical communication in the termites. These are accompanied by major changes in gene regulation and the molecular evolution of caste determination. Many of these results parallel molecular mechanisms of eusocial evolution in Hymenoptera. However, the specific solutions are remarkably different, thus revealing a striking case of convergence in one of the major evolutionary transitions in biological complexity.
ESTHER : Harrison_2018_Nat.Ecol.Evol_2_557
PubMedSearch : Harrison_2018_Nat.Ecol.Evol_2_557
PubMedID: 29403074
Gene_locus related to this paper: blage-a0a2p8y5s3 , blage-a0a2p8yjf8.2 , blage-a0a2p8xjb6

Title : Characterization of a Novel Thermo-Stable Lipasefrom Endophyte Pseudomonas putida in Pistacia chinensis Bunge - Song_2017_Appl.Biochem.Microbiol_53_524
Author(s) : Song C , Liu Z , Xie Q , Wang H , Huang Y , Ruan Y , Chen D
Ref : Applied Biochemistry and Microbiology , 53 :524 , 2017
Abstract : A novel lipolytic enzyme-producing endophytic strain PC2 was successfully isolated from the seeds of an ideal bioenergy plant Pistacia chinensis Bunge. Based on the analysis of morphology and 16S rRNA sequence, bacterial strain PC2 was identified as a subspecies of Pseudomonas putida, therefore named as P. putida PC2. Whole-genome sequencing showed PC2 contained a 1224-nucleotide lipase gene (named lip-PC2) predicted to encode a 407-amino-acid protein. Purified lipases from both the original PC2 strain and heterologously expressed Escherichia coli were nearly 50 kD with specific activity of 9.48 U/mL. LIP-PC2 displayed the maximal activity at 50C or pH 8.0, and maintained above 80% relative activity in the range of from 40 to 60degC or pH in the range of from 6.0 to 8.0, indicating thermostable and alkaline properties. Enzyme activity was enhanced by Mg2+, Na+ and Mn2+, but strongly inhibited by Cu2+, Zn2+ Co2+, EDTA as well as organic solvents and surfactants. Additionally, the analysis of amino acid sequence and structure indicated that LIP-PC2 was a novel member belonging to family I.3 of bacterial lipolytic enzymes and its catalytic triad was consisted of Ser-200, Asp-342 and His-374
ESTHER : Song_2017_Appl.Biochem.Microbiol_53_524
PubMedSearch : Song_2017_Appl.Biochem.Microbiol_53_524
Gene_locus related to this paper: psepu-a0a160gpc6

Title : Organophosphate esters in sediment cores from coastal Laizhou Bay of the Bohai Sea, China - Wang_2017_Sci.Total.Environ_607-608_103
Author(s) : Wang Y , Wu X , Zhang Q , Hou M , Zhao H , Xie Q , Du J , Chen J
Ref : Sci Total Environ , 607-608 :103 , 2017
Abstract : Concentrations and vertical distributions of organophosphate esters (OPEs) were investigated in the sediment cores collected from the Laizhou Bay, Bohai Sea of China. The total concentrations of OPEs in the sediment core (CA) collected near the Yellow River Estuary were in the range of 11.8-102ng/g, while the total concentrations in the sediment core (CB) near a mariculture area were 6.65-41.5ng/g. Significantly high concentrations of OPEs were found in the sediments near the Yellow River Estuary than those in the mariculture area. Vertical distributions in the sediment cores demonstrated a recent increase of OPE emissions, especially for tri-n-butyl phosphate (TnBP), tris (2-chloroethyl) phosphate (TCEP), and tris (2-chloroisopropyl) phosphate (TCPP). Generally, TCEP and TCPP were the dominant congeners in the sediment cores, while the profiles of TnBP were increase in the surface 0-20cm layers of the CA core. OPEs in the CA core may be remarkably influenced by the discharge of Yellow River, whereas OPEs in the CB core may originate from the transport through seawater. The remarkable increase of OPE flame retardants in the surface sediments raises the concern about their emissions and risks to the environment and indicates the need for further monitoring.
ESTHER : Wang_2017_Sci.Total.Environ_607-608_103
PubMedSearch : Wang_2017_Sci.Total.Environ_607-608_103
PubMedID: 28688252

Title : Pharmacophore-based design and discovery of (-)-meptazinol carbamates as dual modulators of cholinesterase and amyloidogenesis - Xie_2017_J.Enzyme.Inhib.Med.Chem_32_659
Author(s) : Xie Q , Zheng Z , Shao B , Fu W , Xia Z , Li W , Sun J , Zheng W , Zhang W , Sheng W , Zhang Q , Chen H , Wang H , Qiu Z
Ref : J Enzyme Inhib Med Chem , 32 :659 , 2017
Abstract : Multifunctional carbamate-type acetylcholinesterase (AChE) inhibitors with anti-amyloidogenic properties like phenserine are potential therapeutic agents for Alzheimer's disease (AD). We reported here the design of new carbamates using pharmacophore model strategy to modulate both cholinesterase and amyloidogenesis. A five-feature pharmacophore model was generated based on 25 carbamate-type training set compounds. (-)-Meptazinol carbamates that superimposed well upon the model were designed and synthesized, which exhibited nanomolar AChE inhibitory potency and good anti-amyloidogenic properties in in vitro test. The phenylcarbamate 43 was highly potent (IC50 31.6 nM) and slightly selective for AChE, and showed low acute toxicity. In enzyme kinetics assay, 43 exhibited uncompetitive inhibition and reacted by pseudo-irreversible mechanism. 43 also showed amyloid-beta (Abeta) lowering effects (51.9% decrease of Abeta42) superior to phenserine (31% decrease of total Abeta) in SH-SY5Y-APP695 cells at 50 microM. The dual actions of 43 on cholinergic and amyloidogenic pathways indicated potential uses as symptomatic and disease-modifying agents.
ESTHER : Xie_2017_J.Enzyme.Inhib.Med.Chem_32_659
PubMedSearch : Xie_2017_J.Enzyme.Inhib.Med.Chem_32_659
PubMedID: 28274151

Title : (-)-Meptazinol-melatonin hybrids as novel dual inhibitors of cholinesterases and amyloid-beta aggregation with high antioxidant potency for Alzheimer's therapy - Cheng_2015_Bioorg.Med.Chem_23_3110
Author(s) : Cheng S , Zheng W , Gong P , Zhou Q , Xie Q , Yu L , Zhang P , Chen L , Li J , Chen J , Chen H
Ref : Bioorganic & Medicinal Chemistry , 23 :3110 , 2015
Abstract : The multifactorial pathogenesis of Alzheimer's disease (AD) implicates that multi-target-directed ligands (MTDLs) intervention may represent a promising therapy for AD. Amyloid-beta (Abeta) aggregation and oxidative stress, two prominent neuropathological hallmarks in patients, play crucial roles in the neurotoxic cascade of this disease. In the present study, a series of novel (-)-meptazinol-melatonin hybrids were designed, synthesized and biologically characterized as potential MTDLs against AD. Among them, hybrids 7-7c displayed higher dual inhibitory potency toward cholinesterases (ChEs) and better oxygen radical absorbance capacity (ORAC) than the parental drugs. Furthermore, compound 7c could effectively inhibit Abeta self-aggregation, showed favorable safety and the blood-brain barrier (BBB) permeability. Therefore, 7c may serve as a valuable candidate that is worthy of further investigations in the treatment of AD.
ESTHER : Cheng_2015_Bioorg.Med.Chem_23_3110
PubMedSearch : Cheng_2015_Bioorg.Med.Chem_23_3110
PubMedID: 26025073

Title : Determination of Meserine, a new candidate for Alzheimer's disease in mice brain by liquid chromatography-tandem mass spectrometry and its application to a pharmacokinetic and tissue distribution study - Zheng_2014_Anal.Bioanal.Chem_406_3451
Author(s) : Zheng Z , Tang Y , Lv H , Xu J , Zhao H , Xie Q , Qiu Z , Chen H , Wang H
Ref : Anal Bioanal Chem , 406 :3451 , 2014
Abstract : A rapid and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for determination of Meserine ((-)-meptazinol phenylcarbamate), a novel potent inhibitor of acetylcholinesterase (AChE), was developed, validated, and applied to a pharmacokinetic study in mice brain. The lower limit of quantification (LLOQ) was 1 ng mL(-1) and the linear range was 1-1,000 ng mL(-1). The analyte was eluted on a Zorbax SB-Aq column (2.1 x 100 mm, 3.5 mum) with the mobile phase composed of methanol and water (70:30, v/v, aqueous phase contained 10 mM ammonium formate and 0.3% formic acid) using isocratic elution, and monitored by positive electrospray ionization in multiple reaction monitoring (MRM) mode. The flow rate was 0.25 mL min(-1). The injection volume was 5 muL and total run time was 4 min. The relative standard deviation (RSD) of intraday and interday variation was 2.49-7.81 and 3.01-7.67%, respectively. All analytes were stable after 4 h at room temperature and 6 h in autosampler. The extraction recoveries of Meserine in brain homogenate were over 90%. The main brain pharmacokinetic parameters obtained after intranasal administration were T max = 0.05 h, C max = 462.0 +/- 39.7 ng g(-1), T 1/2 = 0.4 h, and AUC(0-infinity) = 283.1 +/- 9.1 ng h g(-1). Moreover, Meserine was distributed rapidly and widely into brain, heart, liver, spleen, lung, and kidney tissue. The method is validated and could be applied to the pharmacokinetic and tissue distribution study of Meserine in mice.
ESTHER : Zheng_2014_Anal.Bioanal.Chem_406_3451
PubMedSearch : Zheng_2014_Anal.Bioanal.Chem_406_3451
PubMedID: 24756818

Title : Meserine, a Novel Carbamate AChE Inhibitor, Ameliorates Scopolamine-Induced Dementia and Alleviates Amyloidogenesis of APP\/PS1 Transgenic Mice - Shao_2014_CNS.Neurosci.Ther_20_165
Author(s) : Shao BY , Xia Z , Xie Q , Ge XX , Zhang WW , Sun J , Jiang P , Wang H , Le WD , Qiu ZB , Lu Y , Chen HZ
Ref : CNS Neurosci Ther , 20 :165 , 2014
Abstract : AIMS: To investigate whether Meserine, a novel phenylcarbamate derivative of (-)-meptazinol, possesses beneficial activities against cholinergic deficiency and amyloidogenesis, the two major pathological characteristics of Alzheimer's disease (AD).
METHODS: Ellman's assay and Morris water maze were used to detect acetylcholinesterase (AChE) activity and evaluate spatial learning and memory ability, respectively. Both high content screening and Western blotting were carried out to detect beta-amyloid precursor protein (APP), while RT-PCR and ELISA were conducted to detect APP-mRNA and beta-amyloid peptide (Abeta).
RESULTS: In scopolamine-induced dementia mice, Meserine (1 mg/kg, i.p.) significantly ameliorated spatial learning and memory deficits, which was consistent with its in vitro inhibitory ability against AChE (recombinant human AChE, IC50 = 274 +/- 49 nM). Furthermore, Meserine (7.5 mg/kg) injected intraperitoneally once daily for 3 weeks lowered APP level by 28% and Abeta42 level by 42% in APP/PS1 transgenic mouse cerebrum. This APP modulation action might be posttranscriptional, as Meserine reduced APP by about 30% in SH-SY5Y-APP695 cells but did not alter APP-mRNA level. And both APP and Abeta42 lowering action of Meserine maintained longer than that of rivastigmine. CONCLUSION: Meserine executes dual actions against cholinergic deficiency and amyloidogenesis and provides a promising lead compound for symptomatic and modifying therapy of AD.
ESTHER : Shao_2014_CNS.Neurosci.Ther_20_165
PubMedSearch : Shao_2014_CNS.Neurosci.Ther_20_165
PubMedID: 24279603

Title : Bis(9)-(-)-nor-meptazinol as a novel dual-binding AChEI potently ameliorates scopolamine-induced cognitive deficits in mice - Liu_2013_Pharmacol.Biochem.Behav_104_138
Author(s) : Liu T , Xia Z , Zhang WW , Xu JR , Ge XX , Li J , Cui Y , Qiu ZB , Xu J , Xie Q , Wang H , Chen HZ
Ref : Pharmacol Biochem Behav , 104 :138 , 2013
Abstract : Alzheimer's disease (AD) is a multifaceted neurodegenerative disorder which is characterized by the progressive deterioration of cognition and the emergence of behavioral and psychological symptoms in aging patients. Given that the clinical effectiveness of acetylcholinesterase inhibitors (AChEIs) has still been questioned due to dubious disease-modifying effects, the multi-target directed ligand (MTDL) design has become an emerging strategy for developing new drugs for AD treatment. Bis(9)-(-)-nor-meptazinol (Bis-Mep) was firstly reported by us as a novel MTDL for both potent cholinesterase and amyloid-beta aggregation inhibition. In this study, we further explored its AChE inhibition kinetic features and cognitive amelioration. Bis-Mep was found to be a mixed-type inhibitor on electric eel AChE by enzyme kinetic study. Molecular docking revealed that two "water bridges" located at the two wings of Bis-Mep stabilized its interaction with both catalytic and peripheral anionic sites of AChE. Furthermore, subcutaneous administration of Bis-Mep (10, 100 or 1000ng/kg) significantly reversed the scopolamine-induced memory deficits in a typical bell-shaped dose-response manner. The maximal cognitive amelioration of Bis-Mep was achieved at 100ng/kg, comparable with the effect of a reference drug Huperzine A at 1mg/kg and also the relevant AChE inhibition in brain. These findings suggested that Bis-Mep might be a promising dual-binding AChE inhibitor for potential AD therapeutics.
ESTHER : Liu_2013_Pharmacol.Biochem.Behav_104_138
PubMedSearch : Liu_2013_Pharmacol.Biochem.Behav_104_138
PubMedID: 23262302

Title : Novel bis-(-)-nor-meptazinol derivatives act as dual binding site AChE inhibitors with metal-complexing property - Zheng_2012_Toxicol.Appl.Pharmacol_264_65
Author(s) : Zheng W , Li J , Qiu Z , Xia Z , Li W , Yu L , Chen H , Chen J , Chen Y , Hu Z , Zhou W , Shao B , Cui Y , Xie Q
Ref : Toxicol Appl Pharmacol , 264 :65 , 2012
Abstract : The strategy of dual binding site acetylcholinesterase (AChE) inhibition along with metal chelation may represent a promising direction for multi-targeted interventions in the pathophysiological processes of Alzheimer's disease (AD). In the present study, two derivatives (ZLA and ZLB) of a potent dual binding site AChE inhibitor bis-(-)-nor-meptazinol (bis-MEP) were designed and synthesized by introducing metal chelating pharmacophores into the middle chain of bis-MEP. They could inhibit human AChE activity with IC(50) values of 9.63uM (for ZLA) and 8.64uM (for ZLB), and prevent AChE-induced amyloid-beta (Abeta) aggregation with IC(50) values of 49.1uM (for ZLA) and 55.3uM (for ZLB). In parallel, molecular docking analysis showed that they are capable of interacting with both the catalytic and peripheral anionic sites of AChE. Furthermore, they exhibited abilities to complex metal ions such as Cu(II) and Zn(II), and inhibit Abeta aggregation triggered by these metals. Collectively, these results suggest that ZLA and ZLB may act as dual binding site AChEIs with metal-chelating potency, and may be potential leads of value for further study on disease-modifying treatment of AD.
ESTHER : Zheng_2012_Toxicol.Appl.Pharmacol_264_65
PubMedSearch : Zheng_2012_Toxicol.Appl.Pharmacol_264_65
PubMedID: 22842334

Title : Draft genome sequence of Gordonia neofelifaecis NRRL B-59395, a cholesterol-degrading actinomycete - Ge_2011_J.Bacteriol_193_5045
Author(s) : Ge F , Li W , Chen G , Liu Y , Zhang G , Yong B , Wang Q , Wang N , Huang Z , Wang J , Wu C , Xie Q , Liu G
Ref : Journal of Bacteriology , 193 :5045 , 2011
Abstract : We report a draft sequence of the genome of Gordonia neofelifaecis NRRL B-59395, a cholesterol-degrading actinomycete isolated from fresh feces of a clouded leopard (Neofelis nebulosa). As predicted, the reported genome contains several gene clusters for cholesterol degradation. This is the second available genome sequence of the family Gordoniaceae.
ESTHER : Ge_2011_J.Bacteriol_193_5045
PubMedSearch : Ge_2011_J.Bacteriol_193_5045
PubMedID: 21742880
Gene_locus related to this paper: 9acto-f1yem7 , 9acto-f1yf25 , 9acto-f1yf38 , 9acto-f1yie2 , 9acto-f1yih2 , 9acto-f1yj54 , 9acto-f1yj56 , 9acto-f1yjv0 , 9acto-f1yjw7 , 9acto-f1yk15 , 9acto-f1ykt6 , 9acto-f1ylb2 , 9acto-f1yld6 , 9acto-f1yme6 , 9acto-f1yma9 , 9acto-f1ymg7 , 9acto-f1ydt0 , 9acto-f1yfj9 , 9actn-f1yfi8

Title : Gene structure, recombinant expression and functional characterization of grass carp leptin - Li_2010_Gen.Comp.Endocrinol_166_117
Author(s) : Li GG , Liang XF , Xie Q , Li G , Yu Y , Lai K
Ref : General & Comparative Endocrinology , 166 :117 , 2010
Abstract : Leptin is an important hormone for the regulation of food intake, energy expenditure and reproduction in mammals, but information regarding its role in teleosts remains scant. In the present study, the gene structures of grass carp (Ctenopharyngodon idellus) and silver carp (Hypophthalmichthys molitrix) leptins were characterized. Recombinant grass carp leptin (rgc-LEP) was expressed in Escherichia coli and purified, and identified by mass spectrometric analysis. A strong anorexic effect on food intake was observed in grass carp on the first day after intraperitoneal (IP) injection of rgc-LEP, but not during the following days. Body weight of the leptin group (LEP group) and the pair-fed group (PF group) showed no difference throughout the experimental period. The acute and chronic effects on the expression of key genes correlating to food intake, energy expenditure, lipid metabolism and digestion were further characterized by real-time PCR. Accordingly, the mRNA levels of neuropeptide Y (NPY), Stearoyl-CoA desaturase 1 (SCD1) and lipoprotein lipase (LPL) were significantly reduced whereas the mRNA levels of uncoupling protein 2 (UCP2), bile salt-activated lipase (BSAL) and fatty acid elongase (ELO) were significantly elevated on the first day after injection. No effect on the expression of these genes (except LPL) was observed on day 13. In contrast to the down-regulation by exogenous leptin in mammals, the mRNA level of grass carp leptin was elevated 5.76-fold on the first day after rgc-LEP treatment. Our results suggest that leptin has an acute effect on the regulation of food intake, energy expenditure and lipid metabolism in grass carp, but the effect can be rapidly counteracted through mechanisms that are currently unknown.
ESTHER : Li_2010_Gen.Comp.Endocrinol_166_117
PubMedSearch : Li_2010_Gen.Comp.Endocrinol_166_117
PubMedID: 19857495

Title : Novel piperazine derivative PMS1339 exhibits tri-functional properties and cognitive improvement in mice - Miezan_2009_Int.J.Neuropsychopharmacol_12_1409
Author(s) : Miezan Ezoulin JM , Shao BY , Xia Z , Xie Q , Li J , Cui YY , Wang H , Dong CZ , Zhao YX , Massicot F , Qiu ZB , Heymans F , Chen HZ
Ref : Int J Neuropsychopharmacol , 12 :1409 , 2009
Abstract : Amyloid-beta-induced neuroinflammation plays a central role in the extensive loss of cholinergic neurons and cognitive decline in Alzheimer's disease. The acetylcholinesterase (AChE) inhibitors are the first class of drugs used to enhance surviving cholinergic activities. However, their limited effectiveness following long-term treatment raises a need for new multi-target therapies. We report herein a novel piperazine derivative compound PMS1339 possesses multifunctional properties including anti-platelet-activating factor, AChE inhibition, Abeta aggregation inhibition and cognitive improvement. PMS1339 could significantly inhibit both mice brain AChE (IC50=4.41+/-0.63 microM) and sera butyrylcholinesterase (BuChE, IC50=1.09+/-0.20 microM). PMS1339 was also found to inhibit neuronal AChE secreted by SH-SY5Y cell line (IC50=17.95+/-2.31 microM). Enzyme kinetics experiments performed on electric eel AChE indicated that PMS1339 acts as a mixed type competitive AChE inhibitor. Molecular docking studies using the X-ray crystal structure of AChE from Torpedo californica elucidated the interactions between PMS1339 and AChE: PMS1339 is well buried inside the active-site gorge of AChE interacting with Trp84 at the bottom, Tyr121 halfway down and Trp279 at the peripheral anionic site (PAS). Thioflavin T-based fluorimetric assay revealed the ability of PMS1339 to inhibit AChE-induced Abeta aggregation. In-vivo study indicated PMS1339 (1 mg/kg i.p.) reversed scopolamine-induced memory impairment in mice. Overall, these findings indicated that PMS1339 exhibits tri-functional properties in vitro and cognitive improvement in vivo, and revealed the emergence of a multi-target-directed ligand to tackle the determinants of Alzheimer's disease.
ESTHER : Miezan_2009_Int.J.Neuropsychopharmacol_12_1409
PubMedSearch : Miezan_2009_Int.J.Neuropsychopharmacol_12_1409
PubMedID: 19460190

Title : The crystal structure of a complex of acetylcholinesterase with a bis-(-)-nor-meptazinol derivative reveals disruption of the catalytic triad - Paz_2009_J.Med.Chem_52_2543
Author(s) : Paz A , Xie Q , Greenblatt HM , Fu W , Tang Y , Silman I , Qiu Z , Sussman JL
Ref : Journal of Medicinal Chemistry , 52 :2543 , 2009
Abstract : A bis-(-)-nor-meptazinol derivative in which the two meptazinol rings are linked by a nonamethylene spacer is a novel acetylcholinesterase inhibitor that inhibits both catalytic activity and Abeta peptide aggregation. The crystal structure of its complex with Torpedo californica acetylcholinesterase was determined to 2.7 A resolution. The ligand spans the active-site gorge, with one nor-meptazinol moiety bound at the "anionic" subsite of the active site, disrupting the catalytic triad by forming a hydrogen bond with His440N(epsilon2), which is hydrogen-bonded to Ser200O(gamma) in the native enzyme. The second nor-meptazinol binds at the peripheral "anionic" site at the gorge entrance. A number of GOLD models of the complex, using both native TcAChE and the protein template from the crystal structure of the bis-(-)-nor-meptazinol/TcAChE complex, bear higher similarity to the X-ray structure than a previous model obtained using the mouse enzyme structure. These findings may facilitate rational design of new meptazinol-based acetylcholinesterase inhibitors.
ESTHER : Paz_2009_J.Med.Chem_52_2543
PubMedSearch : Paz_2009_J.Med.Chem_52_2543
PubMedID: 19326912
Gene_locus related to this paper: torca-ACHE

Title : Bis-(-)-nor-meptazinols as novel nanomolar cholinesterase inhibitors with high inhibitory potency on amyloid-beta aggregation - Xie_2008_J.Med.Chem_51_2027
Author(s) : Xie Q , Wang H , Xia Z , Lu M , Zhang W , Wang X , Fu W , Tang Y , Sheng W , Li W , Zhou W , Zhu X , Qiu Z , Chen H
Ref : Journal of Medicinal Chemistry , 51 :2027 , 2008
Abstract : Bis-(-)-nor-meptazinols (bis-(-)-nor-MEPs) 5 were designed and synthesized by connecting two (-)-nor-MEP monomers with alkylene linkers of different lengths via the secondary amino groups. Their acetylcholinesterase (AChE) inhibitory activities were more greatly influenced by the length of the alkylene chain than butyrylcholinesterase (BChE) inhibition. The most potent nonamethylene-tethered dimer 5h exhibited low-nanomolar IC 50 values for both ChEs, having a 10 000-fold and 1500-fold increase in inhibition of AChE and BChE compared with (-)-MEP. Molecular docking elucidated that 5h simultaneously bound to the catalytic and peripheral sites in AChE via hydrophobic interactions with Trp86 and Trp286. In comparison, it folded in the large aliphatic cavity of BChE because of the absence of peripheral site and the enlargement of the active site. Furthermore, 5h and 5i markedly prevented the AChE-induced Abeta aggregation with IC 50 values of 16.6 and 5.8 microM, similar to that of propidium (IC 50 = 12.8 microM), which suggests promising disease-modifying agents for the treatment of AD patients.
ESTHER : Xie_2008_J.Med.Chem_51_2027
PubMedSearch : Xie_2008_J.Med.Chem_51_2027
PubMedID: 18333606

Title : Caregiver acceptance of adverse effects and use of cholinesterase inhibitors in Alzheimer's disease - Oremus_2007_Can.J.Aging_26_205
Author(s) : Oremus M , Wolfson C , Vandal AC , Bergman H , Xie Q
Ref : Can J Aging , 26 :205 , 2007
Abstract : Caregivers play a determining role in choosing treatments for persons with Alzheimer's disease. The objective of this study was to examine caregivers' willingness to have persons with Alzheimer's disease continue taking cholinesterase inhibitors in the event that any 1 of 11 adverse effects was to occur. Data were gathered via postal questionnaire from 375 caregivers in Montreal. Sixty-four per cent of caregivers responded ( n = 201), and most (> or =59%) were willing to continue treatment if persons with Alzheimer's disease suffered from weight loss or loss of appetite. However, most (> or =53%) were not willing to continue treatment in the event of headache, dizziness, nausea, diarrhea, vomiting, drop in blood pressure, insomnia, muscle cramps, or stomach bleeding. The use of cholinesterase inhibitors by persons with Alzheimer's disease was positively associated with caregivers' willingness to accept greater numbers of adverse effects (adjusted relative risk = 1.97; 95% CI = 1.11 to 3.61). Caregivers appear to make a risk-benefit assessment when they decide whether or not care-recipients should continue pharmacotherapy in the event of adverse effects.
ESTHER : Oremus_2007_Can.J.Aging_26_205
PubMedSearch : Oremus_2007_Can.J.Aging_26_205
PubMedID: 18238727

Title : Investigation of the binding mode of (-)-meptazinol and bis-meptazinol derivatives on acetylcholinesterase using a molecular docking method - Xie_2006_J.Mol.Model_12_390
Author(s) : Xie Q , Tang Y , Li W , Wang XH , Qiu ZB
Ref : J Mol Model , 12 :390 , 2006
Abstract : Molecular docking has been performed to investigate the binding mode of (-)-meptazinol (MEP) with acetylcholinesterase (AChE) and to screen bis-meptazinol (bis-MEP) derivatives for preferable synthetic candidates virtually. A reliable and practical docking method for investigation of AChE ligands was established by the comparison of two widely used docking programs, FlexX and GOLD. In our hands, we had more luck using GOLD than FlexX in reproducing the experimental poses of known ligands (RMSD<1.5 A). GOLD fitness values of known ligands were also in good agreement with their activities. In the present GOLD docking protocol, (-)-MEP seemed to bind with the enzyme catalytic site in an open-gate conformation through strong hydrophobic interactions and a hydrogen bond. Virtual screening of a potential candidate compound library suggested that the most promising 15 bis-MEP derivatives on the list were mainly derived from (-)-MEP with conformations of (S,S) and (SR,RS) and with a 2- to 7-carbon linkage. Although there are still no biological results to confirm the predictive power of this method, the current study could provide an alternate tool for structural optimization of (-)-MEP as new AChE inhibitors. [Figure: see text].
ESTHER : Xie_2006_J.Mol.Model_12_390
PubMedSearch : Xie_2006_J.Mol.Model_12_390
PubMedID: 16404617

Title : Collection, mapping, and annotation of over 28,000 cDNA clones from japonica rice - Kikuchi_2003_Science_301_376
Author(s) : Kikuchi S , Satoh K , Nagata T , Kawagashira N , Doi K , Kishimoto N , Yazaki J , Ishikawa M , Yamada H , Ooka H , Hotta I , Kojima K , Namiki T , Ohneda E , Yahagi W , Suzuki K , Li CJ , Ohtsuki K , Shishiki T , Otomo Y , Murakami K , Iida Y , Sugano S , Fujimura T , Suzuki Y , Tsunoda Y , Kurosaki T , Kodama T , Masuda H , Kobayashi M , Xie Q , Lu M , Narikawa R , Sugiyama A , Mizuno K , Yokomizo S , Niikura J , Ikeda R , Ishibiki J , Kawamata M , Yoshimura A , Miura J , Kusumegi T , Oka M , Ryu R , Ueda M , Matsubara K , Kawai J , Carninci P , Adachi J , Aizawa K , Arakawa T , Fukuda S , Hara A , Hashizume W , Hayatsu N , Imotani K , Ishii Y , Itoh M , Kagawa I , Kondo S , Konno H , Miyazaki A , Osato N , Ota Y , Saito R , Sasaki D , Sato K , Shibata K , Shinagawa A , Shiraki T , Yoshino M , Hayashizaki Y , Yasunishi A
Ref : Science , 301 :376 , 2003
Abstract : We collected and completely sequenced 28,469 full-length complementary DNA clones from Oryza sativa L. ssp. japonica cv. Nipponbare. Through homology searches of publicly available sequence data, we assigned tentative protein functions to 21,596 clones (75.86%). Mapping of the cDNA clones to genomic DNA revealed that there are 19,000 to 20,500 transcription units in the rice genome. Protein informatics analysis against the InterPro database revealed the existence of proteins presented in rice but not in Arabidopsis. Sixty-four percent of our cDNAs are homologous to Arabidopsis proteins.
ESTHER : Kikuchi_2003_Science_301_376
PubMedSearch : Kikuchi_2003_Science_301_376
PubMedID: 12869764
Gene_locus related to this paper: orysa-Q852M6 , orysa-Q8GSE8 , orysa-Q9FYP7 , orysa-Q5JLP6 , orysa-Q8H5P5 , orysa-Q7F1Y5 , orysa-cbp3 , orysa-Q6YSZ8 , orysa-Q8S5X5 , orysa-Q8LIG3 , orysa-Q7F1B1 , orysa-Q9FW17 , orysa-Q337C3 , orysa-Q84QZ6 , orysa-Q84QY7 , orysa-Q6ZDG5 , orysa-Q658B2 , orysa-Q8H3R3 , orysa-Q5SNH3 , orysa-q2qnj4 , orysa-q2qyi1 , orysa-Q4VWY7 , orysa-q5smv5 , orysa-q5z901 , orysa-Q5ZBI5 , orysa-q6atz0 , orysa-q6i5q3 , orysj-q6yse8 , orysa-q6z8b1 , orysa-q6z995 , orysa-q7x7y5 , orysa-q7xkj9 , orysa-q7xr63 , orysa-q7xsq2 , orysa-q7xts6 , orysa-Q8LQS5 , orysa-Q8W3C6 , orysa-q53m20 , orysa-q67iz3 , orysa-q67j02 , orysa-q67j05 , orysa-q67j09 , orysa-q67j10 , orysa-q67tv0 , orysa-q67uz1 , orysa-q69xr2 , orysa-q69y21 , orysa-q75hy2 , orysa-q75i01 , orysa-q688m8 , orysa-q688m9 , orysa-Q6H8G1 , orysi-b8a7e7 , orysi-b8bfe5 , orysj-cgep , orysj-q0djj0 , orysj-q0jaf0 , orysj-q5jl22 , orysj-q6h7q9 , orysj-q6yvk6 , orysj-q7f8x1 , orysj-q10j20 , orysj-q10ss2 , orysj-q69uw6