Shi Z

References (20)

Title : An Esterase-Responsive SLC7A11 shRNA Delivery System Induced Ferroptosis and Suppressed Hepatocellular Carcinoma Progression - Zhang_2024_Pharmaceutics_16_
Author(s) : Zhang H , Wang J , Xiang X , Xie C , Lu X , Guo H , Sun Y , Shi Z , Song H , Qiu N , Xu X
Ref : Pharmaceutics , 16 : , 2024
Abstract : Ferroptosis has garnered attention as a potential approach to fight against cancer, which is characterized by the iron-driven buildup of lipid peroxidation. However, the robust defense mechanisms against intracellular ferroptosis pose significant challenges to its effective induction. In this paper, an effective gene delivery vehicle was developed to transport solute carrier family 7 member 11 (SLC7A11) shRNA (shSLC7A11), which downregulates the expression of the channel protein SLC7A11 and glutathione peroxidase 4 (GPX4), evoking a surge in reactive oxygen species production, iron accumulation, and lipid peroxidation in hepatocellular carcinoma (HCC) cells, and subsequently leading to ferroptosis. This delivery system is composed of an HCC-targeting lipid layer and esterase-responsive cationic polymer, a poly{N-[2-(acryloyloxy)ethyl]-N-[p-acetyloxyphenyl]-N} (PQDEA) condensed shSLC7A11 core (G-LPQDEA/shSLC7A11). After intravenous (i.v.) injection, G-LPQDEA/shSLC7A11 quickly accumulated in the tumor, retarding its growth by 77% and improving survival by two times. This study is the first to construct a gene delivery system, G-LPQDEA/shSLC7A11, that effectively inhibits HCC progression by downregulating SLC7A11 expression. This underscores its therapeutic potential as a safe and valuable candidate for clinical treatment.
ESTHER : Zhang_2024_Pharmaceutics_16_
PubMedSearch : Zhang_2024_Pharmaceutics_16_
PubMedID: 38399303

Title : Synthesis and evaluation of a highly selective cannabidiol amide cholinesterase inhibitor - Zhang_2024_Results.Chem_7_101492
Author(s) : Zhang R , Zhao M , Wang D , Zhao Y , Li J , Zhang S , Zhang W , Shi Z
Ref : Results in Chemistry , 7 :101492 , 2024
Abstract : The therapeutic mechanism for the treatment of Alzheimer's disease (AD) is mainly by inhibiting the activity of cholinesterase (ChE) and increasing the transmission of choline and the function of neurons. In this study, two series of ChE inhibitors (CA1CA8 and CB1CB7) were designed and synthesized by the acylation of a cannabinoid (CBD) with bromoacetyl bromide, or the esterification of a CBD with an amino acid. All the synthesized compounds were tested for in vitro activity to evaluate the compounds as AD therapies. Compound CB7 was identified as a potential butyrylcholinesterase (BuChE) inhibitor (IC50=0.310.09microM), which did not display toxicity against HepG2 or PC12 cells at 6.25microM. Compound CB7 showed good antioxidant behavior, effective anti-tyrosinase activity (IC50=0.0370.003microM), and anti-acetylcholinesterase (AChE) activity (IC50=19.730.79microM). Kinetic studies also showed that CB7 can act as a dual inhibitor. These results provide a theoretical basis for the use of the natural product CBD in the design and development of anti-AD drugs.
ESTHER : Zhang_2024_Results.Chem_7_101492
PubMedSearch : Zhang_2024_Results.Chem_7_101492

Title : Biodegradation of PET by the membrane-anchored PET esterase from the marine bacterium Rhodococcus pyridinivorans P23 - Guo_2023_Commun.Biol_6_1090
Author(s) : Guo W , Duan J , Shi Z , Yu X , Shao Z
Ref : Commun Biol , 6 :1090 , 2023
Abstract : Evidence for microbial biodegradation of polyethylene terephthalate (PET) has been reported, but little is known about the PET biodegradation process and molecular mechanism by marine microorganisms. Here, we show the biodegradation of PET by the membrane-anchored PET esterase from the marine bacterium Rhodococcus pyridinivorans P23, elucidate the properties of this enzyme, and propose the PET biodegradation by this strain in biofilm. We identify the PET-degrading enzyme dubbed PET esterase through activity tracking. In addition to depolymerizing PET, it hydrolyzes MHET into TPA under acid conditions. We prove that it is a low and constitutively transcribed, membrane-anchored protein displayed on the cell surface. Furthermore, we also investigate the microbial groups possessing PET esterase coupled with the TPA degradation pathway, mainly in the phyla Proteobacteria and Actinobacteriota. Clarification of the microbial PET biodegradation in the marine environment will contribute to the understanding of bioremediation of marine PET pollution.
ESTHER : Guo_2023_Commun.Biol_6_1090
PubMedSearch : Guo_2023_Commun.Biol_6_1090
PubMedID: 37891241
Gene_locus related to this paper: rhorh-a0a6i6yk83

Title : The complete genome sequence of Pseudomonas chengduensis BC1815 for genome mining of PET degrading enzymes - Shi_2023_Mar.Genomics_67_101008
Author(s) : Shi Z , Yu X , Duan J , Guo W
Ref : Mar Genomics , 67 :101008 , 2023
Abstract : Pseudomonas chengduensis BC1815, isolated from a marine sediment sample of the Pacific Ocean, can grow in mineral medium with PET plastic as sole carbon source. Here, we present the complete genome of Pseudomonas chengduensis BC1815, which will facilitate the genome mining of PET degrading enzymes. The total length of the sequenced genome consists of 5,578,440 bases, with mean Gs+sC content of 62.65%. A total of 5150 coding genes including 65 tRNAs and 12 rRNAs were predicted in the genome. Thirteen proteins of esterase, lipase and alpha/beta hydrolase were taken as candidates for PET degrading enzymes, in which eight were membrane bounded and the others were secretory.
ESTHER : Shi_2023_Mar.Genomics_67_101008
PubMedSearch : Shi_2023_Mar.Genomics_67_101008
PubMedID: 36682853

Title : Prolonged sevoflurane exposure causes abnormal synapse development and dysregulates beta-neurexin and neuroligins in the hippocampus in neonatal rats - Zhang_2022_J.Affect.Disord__
Author(s) : Zhang W , Chen Y , Qin J , Lu J , Fan Y , Shi Z , Song X , Li C , Zhao T
Ref : J Affect Disord , : , 2022
Abstract : BACKGROUND: The underlying molecular mechanisms of the excitatory/inhibitory (E/I) imbalance induced by sevoflurane exposure to neonates remain poorly understood. This study aimed to investigate the long-term effects of prolonged sevoflurane exposure to neonatal rats during the peak period of synaptogenesis on the changes of trans-synaptic neurexin-neuroligin interactions, synaptic ultrastructure in the hippocampus and cognition. METHODS: A total of 30 rat pups at postnatal day (P) 7 was randomly divided into two groups: the control group (exposed to 30 % oxygen balanced with nitrogen) and the sevoflurane group (exposed to 2.5 % sevoflurane plus 30 % oxygen balanced with nitrogen) for 6 h. Neurocognitive behaviors were assessed with the Open field test at P23-25 and the Morris water maze test at P26-30. The expression of beta-neurexin (beta-NRX), N-methyl-d-aspartate receptor 2 subunit (NR2A and NR2B), neuroligin-1 (NLG-1), neuroligin-2 (NLG-2), postsynaptic density protein-95 (PSD-95), alpha1-subunit of the gamma-aminobutyric acid A receptor (GABAAalpha1) and gephyrin in the hippocampus at P30 were measured by Western blot. The ultrastructure of synapses was examined under electron microscope. RESULTS: Prolonged sevoflurane exposure at P7 resulted in cognitive deficiency in adolescence, as well as the downregulation of beta-NRX, NR2A, NR2B, NLG-1, and PSD-95, and the upregulation of GABAAalpha1, NLG-2, and gephyrin in the hippocampal CA3 region. Sevoflurane anesthesia also increased the number of symmetric synapses in the hippocampus. CONCLUSIONS: Prolonged sevoflurane exposure during the brain development leads to cognitive deficiency and disproportion of excitatory/inhibitory synapses which may be caused by dysregulated expression of synaptic adhesion molecules of beta-NRX and neuroligins.
ESTHER : Zhang_2022_J.Affect.Disord__
PubMedSearch : Zhang_2022_J.Affect.Disord__
PubMedID: 35691415

Title : Covalent CES2 Inhibitors Protect against Reduced Formation of Intestinal Organoids by the Anticancer Drug Irinotecan - Eades_2022_Curr.Drug.Metab__
Author(s) : Eades W , Liu W , Shen Y , Shi Z , Yan B
Ref : Curr Drug Metab , : , 2022
Abstract : BACKGROUND: Irinotecan is widely used to treat various types of solid and metastatic cancer. It is an ester prodrug and its hydrolytic metabolite (SN-38) exerts potent anticancer activity. Irinotecan is hydrolyzed primarily by carboxylesterase-2 (CES2), a hydrolase abundantly present in the intestine such as the duodenum. We have identified several potent and covalent CES2 inhibitors such as remdesivir and sofosbuvir. Remdesivir is the first small molecule drug approved for COVID-19, whereas sofosbuvir is a paradigm-shift medicine for hepatitis C viral infection. Irinotecan is generally well-tolerated but associated with severe/life-threatening diarrhea due to intestinal accumulation of SN-38. OBJECTIVE: This study was to test the hypothesis that remdesivir and sofosbuvir protect against irinotecan-induced epithelial injury associated with gastrointestinal toxicity. METHODS: To test this hypothesis, formation of organoids derived from mouse duodenal crypts, a robust cellular model for intestinal regeneration, was induced in the presence or absence of irinotecan +/- pretreatment with a CES2 drug inhibitor. RESULTS: Irinotecan profoundly inhibited the formation of intestinal organoids and the magnitude of the inhibition was greater with female crypts than their male counterparts. Consistently, crypts from female mice had significantly higher hydrolytic activity toward irinotecan. Critically, remdesivir and sofosbuvir both reduced irinotecan hydrolysis and reversed irinotecan-reduced formation of organoids. Human duodenal samples robustly hydrolyzed irinotecan, stable CES2 transfection induced cytotoxicity and the cytotoxicity was reduced by CES2 drug inhibitor. CONCLUSION: These findings establish a therapeutic rationale to reduce irinotecan-gastrointestinal injury and serve as a cellular foundation to develop oral formulations of irinotecan with high safety.
ESTHER : Eades_2022_Curr.Drug.Metab__
PubMedSearch : Eades_2022_Curr.Drug.Metab__
PubMedID: 36515038

Title : Extradural Contralateral C7 Nerve Root Transfer in a Cervical Posterior Approach for Treating Spastic Limb Paralysis: A Cadaver Feasibility Study - Yang_2020_Spine.(Phila.Pa.1976)_45_E608
Author(s) : Yang K , Jiang F , Zhang S , Zhao H , Shi Z , Liu J , Cao X
Ref : Spine (Phila Pa 1976) , 45 :E608 , 2020
Abstract : STUDY DESIGN: Anatomic study in nine fresh-frozen cadavers. OBJECTIVE: To confirm the anatomical feasibility of transferring the extradural ventral roots (VRs) and dorsal roots (DRs) of contralateral C7 nerves to those of the ipsilateral C7 nerves respectively through a cervical posterior approach. SUMMARY OF BACKGROUND DATA: The contralateral C7 nerve root transfer technique makes breakthrough for treating spastic limb paralysis. However, its limitations include large surgical trauma and limited indications. METHODS: Nine fresh-frozen cadavers (four females and five males) were placed prone, and the feasibility of exposing the bilateral extradural C7 nerve roots, separation of the extradural C7 VR and DR, and transfer of the VR and DR of the contralateral C7 to those of the ipsilateral C7 on the dural mater were assessed. The pertinent distances and the myelography results of each specimen were analyzed. The acetylcholinesterase (AChE) and antineurofilament 200 (NF200) double immunofluorescent staining were preformed to determine the nerve fiber properties. RESULTS: A cervical posterior midline approach was made and the laminectomy was performed to expose the bilateral extradural C7 nerve roots. After the extradural C7 VR and DR are separated, the VR and DR of the contralateral C7 have sufficient lengths to be transferred to those of the ipsilateral C7 on the dural mater. The myelography results showed that the spinal cord is not compressed after the nerve anastomosis. The AChE and NF200 double immunofluorescent staining showed the distal ends of the contralateral C7 VRs were mostly motor nerve fibers, and the distal ends of the contralateral C7 DRs were mostly sensory nerve fibers. CONCLUSION: Extradural contralateral C7 nerve root transfer in a cervical posterior approach for treating spastic limb paralysis is anatomically feasible. LEVEL OF EVIDENCE: 5.
ESTHER : Yang_2020_Spine.(Phila.Pa.1976)_45_E608
PubMedSearch : Yang_2020_Spine.(Phila.Pa.1976)_45_E608
PubMedID: 31770316

Title : Molecular Mechanism for Antibody-Dependent Enhancement of Coronavirus Entry - Wan_2020_J.Virol_94_
Author(s) : Wan Y , Shang J , Sun S , Tai W , Chen J , Geng Q , He L , Chen Y , Wu J , Shi Z , Zhou Y , Du L , Li F
Ref : J Virol , 94 : , 2020
Abstract : Antibody-dependent enhancement (ADE) of viral entry has been a major concern for epidemiology, vaccine development, and antibody-based drug therapy. However, the molecular mechanism behind ADE is still elusive. Coronavirus spike protein mediates viral entry into cells by first binding to a receptor on the host cell surface and then fusing viral and host membranes. In this study, we investigated how a neutralizing monoclonal antibody (MAb), which targets the receptor-binding domain (RBD) of Middle East respiratory syndrome (MERS) coronavirus spike, mediates viral entry using pseudovirus entry and biochemical assays. Our results showed that MAb binds to the virus surface spike, allowing it to undergo conformational changes and become prone to proteolytic activation. Meanwhile, MAb binds to cell surface IgG Fc receptor, guiding viral entry through canonical viral-receptor-dependent pathways. Our data suggest that the antibody/Fc-receptor complex functionally mimics viral receptor in mediating viral entry. Moreover, we characterized MAb dosages in viral-receptor-dependent, Fc-receptor-dependent, and both-receptors-dependent viral entry pathways, delineating guidelines on MAb usages in treating viral infections. Our study reveals a novel molecular mechanism for antibody-enhanced viral entry and can guide future vaccination and antiviral strategies.IMPORTANCE Antibody-dependent enhancement (ADE) of viral entry has been observed for many viruses. It was shown that antibodies target one serotype of viruses but only subneutralize another, leading to ADE of the latter viruses. Here we identify a novel mechanism for ADE: a neutralizing antibody binds to the surface spike protein of coronaviruses like a viral receptor, triggers a conformational change of the spike, and mediates viral entry into IgG Fc receptor-expressing cells through canonical viral-receptor-dependent pathways. We further evaluated how antibody dosages impacted viral entry into cells expressing viral receptor, Fc receptor, or both receptors. This study reveals complex roles of antibodies in viral entry and can guide future vaccine design and antibody-based drug therapy.
ESTHER : Wan_2020_J.Virol_94_
PubMedSearch : Wan_2020_J.Virol_94_
PubMedID: 31826992

Title : Remdesivir and chloroquine effectively inhibit the recently emerged novel coronavirus (2019-nCoV) in vitro -
Author(s) : Wang M , Cao R , Zhang L , Yang X , Liu J , Xu M , Shi Z , Hu Z , Zhong W , Xiao G
Ref : Cell Res , 30 :269 , 2020
PubMedID: 32020029

Title : Lycosquarrines A-R, Lycopodium Alkaloids from Phlegmariurus squarrosus - Zhu_2020_J.Nat.Prod_83_2831
Author(s) : Zhu X , Xia D , Zhou Z , Xie S , Shi Z , Chen G , Wang L , Pan K
Ref : Journal of Natural Products , 83 :2831 , 2020
Abstract : Eighteen new Lycopodium alkaloids, lycosquarrines A-R (1-18), and eight known alkaloids were isolated from the aerial parts of Phlegmariurus squarrosus. Compounds 1-5 and 19, identified from natural sources for the first time, are uncommon lycopodine-type alkaloids with beta-oriented H-4. Pentacyclic 4 and 5 represent the first examples of 5,12- and 5,11-epoxy Lycopodium alkaloids, respectively, and an epoxide-opening cyclization reaction is suggested to be a key step in their biosynthesis. Compound 18 possesses the same carbon skeleton as carinatine A (22), which was previously reported as a unique Lycopodium alkaloid with a 5/6/6/6 ring system. X-ray crystallographic data analysis was used to determine the absolute configuration of 18, leading to the establishment of the absolute configuration of 22 by comparison of the ECD spectra. An anti-acetylcholinesterase activity assay showed that 11 and 20 exhibited inhibitory activities with IC(50) values of 4.2 and 2.1 microM, respectively.
ESTHER : Zhu_2020_J.Nat.Prod_83_2831
PubMedSearch : Zhu_2020_J.Nat.Prod_83_2831
PubMedID: 32941036

Title : Oncogenic role of ABHD5 in endometrial cancer - Zhou_2019_Cancer.Manag.Res_11_2139
Author(s) : Zhou Q , Wang F , Zhou K , Huang K , Zhu Q , Luo X , Yu J , Shi Z
Ref : Cancer Manag Res , 11 :2139 , 2019
Abstract : Background: Abhydrolase domain containing 5 (ABHD5) functions as a tumor suppressor in colorectal and prostate cancers. The aim of this study was to investigate the roles of ABHD5 in endometrial cancer. Materials and methods: ABHD5 expression was detected in clinical samples by immunohistochemical staining. Cell proliferation and invasion were evaluated with the Cell Counting Kit-8 and Transwell assay, respectively. Western blotting was performed to analyze protein expression. Glucose uptake was assessed by 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]-2-deoxyglucose. Lactate production was detected by a lactate assay kit. Results: In the present study, ABHD5 was overexpressed in endometrial cancer tissues, and its expression was closely correlated with the International Federation of Gynecology and Obstetrics (FIGO) stage and lymph node metastasis. In addition, we observed that the knockdown of ABHD5 inhibited cell proliferation, invasion, glucose uptake and lactate production in HEC-1A cells, which expressed high levels of ABHD5. Conversely, the opposite effects were observed when ABHD5 was ectopically expressed in Ishikawa cells, which had low levels of ABHD5. Furthermore, the changes in glycolysis regulators (enolase 1 [ENO1], glucose transporter 1 [GLUT1] and lactate dehydrogenase A [LDHA]) and epithelial-to-mesenchymal transition-related proteins (E-cadherin and Snail) in HEC-1A cells with ABHD5 knockdown were consistent with the effects of ABHD5 on glycolysis and cell invasion. Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) was increased, while the phosphorylated AKT (p-AKT) was decreased when ABHD5 was downregulated. Notably, treatment with the allosteric AKT inhibitor MK-2206 completely abolished the effects caused by ABHD5 overexpression in Ishikawa cells. Finally, ABHD5 knockdown potently suppressed tumor growth in vivo. Conclusion: Overall, these results suggest that ABHD5 may play an oncogenic role in endometrial cancer via the AKT pathway.
ESTHER : Zhou_2019_Cancer.Manag.Res_11_2139
PubMedSearch : Zhou_2019_Cancer.Manag.Res_11_2139
PubMedID: 30936746
Gene_locus related to this paper: human-ABHD5

Title : Ambient temperature-mediated enzymic activities and intestinal microflora in Lymantria dispar larvae - Zeng_2019_Arch.Insect.Biochem.Physiol__e21597
Author(s) : Zeng J , Shi Z , Shi J , Guo J , Zhang G , Zhang J
Ref : Archives of Insect Biochemistry & Physiology , :e21597 , 2019
Abstract : To understand how ambient temperature affect the gypsy moth larvae, and provide a theoretical basis for pest control in different environments. Fourth instar gypsy moth larvae were incubating for 3 hr at 15, 20, 25, 30, 35, and 40, respectively. Afterward, digestive and antioxidant enzyme activities, total antioxidant capacity, and intestinal microflora community were analyzed to reveal how the caterpillars respond to ambient temperature stress. Results showed that both digestive and antioxidant enzymes were regulated by the ambient temperature. The optimum incubation temperatures of protease, amylase, trehalase, and lipase in gypsy moth larvae were 30, 25, and 20, respectively. When the incubation temperature was deviated optimum temperatures, digestive enzyme activities would be downregulated depending on the extent of temperature stress. In addition, glutathione S-transferase, peroxidase, catalase, and polyphenol oxidase would be activated under a sufferable temperature stress, but superoxide dismutase and carboxylesterase (CarE) would be inhibited. In addition, results showed that the top two abundant phyla were Proteobacteria and Firmicutes. The phylum Firmicutes abundance was decreased and phylum Proteobacteria abundance was increased by ambient temperature stress. Moreover, it suggested that gypsy moth caterpillars at different ambient temperature mainly differed from each other by Escherichia-Shigella and Bifidobacterium in control, Acinetobacter in T15, and Lactobacillus in T40, respectively.
ESTHER : Zeng_2019_Arch.Insect.Biochem.Physiol__e21597
PubMedSearch : Zeng_2019_Arch.Insect.Biochem.Physiol__e21597
PubMedID: 31328829

Title : Two Mutations Were Critical for Bat-to-Human Transmission of Middle East Respiratory Syndrome Coronavirus - Yang_2015_J.Virol_89_9119
Author(s) : Yang Y , Liu C , Du L , Jiang S , Shi Z , Baric RS , Li F
Ref : J Virol , 89 :9119 , 2015
Abstract : To understand how Middle East respiratory syndrome coronavirus (MERS-CoV) transmitted from bats to humans, we compared the virus surface spikes of MERS-CoV and a related bat coronavirus, HKU4. Although HKU4 spike cannot mediate viral entry into human cells, two mutations enabled it to do so by allowing it to be activated by human proteases. These mutations are present in MERS-CoV spike, explaining why MERS-CoV infects human cells. These mutations therefore played critical roles in the bat-to-human transmission of MERS-CoV, either directly or through intermediate hosts.
ESTHER : Yang_2015_J.Virol_89_9119
PubMedSearch : Yang_2015_J.Virol_89_9119
PubMedID: 26063432

Title : Comparative analysis of bat genomes provides insight into the evolution of flight and immunity - Zhang_2013_Science_339_456
Author(s) : Zhang G , Cowled C , Shi Z , Huang Z , Bishop-Lilly KA , Fang X , Wynne JW , Xiong Z , Baker ML , Zhao W , Tachedjian M , Zhu Y , Zhou P , Jiang X , Ng J , Yang L , Wu L , Xiao J , Feng Y , Chen Y , Sun X , Zhang Y , Marsh GA , Crameri G , Broder CC , Frey KG , Wang LF , Wang J
Ref : Science , 339 :456 , 2013
Abstract : Bats are the only mammals capable of sustained flight and are notorious reservoir hosts for some of the world's most highly pathogenic viruses, including Nipah, Hendra, Ebola, and severe acute respiratory syndrome (SARS). To identify genetic changes associated with the development of bat-specific traits, we performed whole-genome sequencing and comparative analyses of two distantly related species, fruit bat Pteropus alecto and insectivorous bat Myotis davidii. We discovered an unexpected concentration of positively selected genes in the DNA damage checkpoint and nuclear factor kappaB pathways that may be related to the origin of flight, as well as expansion and contraction of important gene families. Comparison of bat genomes with other mammalian species has provided new insights into bat biology and evolution.
ESTHER : Zhang_2013_Science_339_456
PubMedSearch : Zhang_2013_Science_339_456
PubMedID: 23258410
Gene_locus related to this paper: myods-l5mij9 , pteal-l5k8f5 , pteal-l5kjy3 , pteal-l5k6f0 , pteal-l5kxe2 , myods-l5m0a8 , myods-l5lvb4 , pteal-l5k7h7 , myods-l5lm42 , pteal-l5jz73 , pteal-l5kvh1.1 , pteal-l5kvh1.2 , pteal-l5kw21 , myods-l5lug5 , pteal-l5kv18 , myods-l5lbf8 , pteal-l5kwh0 , myods-l5lfh8 , myods-l5lfr7 , myods-l5lu20 , pteal-l5jzi4 , pteal-l5kib7 , pteal-l5kyq5 , myods-l5lf36 , myods-l5lnh7 , myods-l5lu25 , pteal-l5k0u1 , pteal-l5k2g6 , pteal-l5l3r3 , myods-l5mdx5 , pteal-l5k220 , myolu-g1pdp2 , pteal-l5l5n3 , pteal-l5k1s7 , myolu-g1nth4 , pteal-l5l7w7 , pteal-l5l537 , myods-l5lwe4 , pteal-l5klr9 , pteal-l5k670 , pteal-l5jr94 , pteal-l5kvb4 , myolu-g1q4e3 , pteal-l5jrl1

Title : Simultaneously enantiospecific determination of (+)-trans-khellactone, (+\/-)-praeruptorin A, (+\/-)-praeruptorin B, (+)-praeruptorin E, and their metabolites, (+\/-)-cis-khellactone, in rat plasma using online solid phase extraction-chiral LC-MS\/MS - Song_2013_J.Pharm.Biomed.Anal_88C_269
Author(s) : Song Y , Jing W , Yang F , Shi Z , Yao M , Yan R , Wang Y
Ref : J Pharm Biomed Anal , 88C :269 , 2013
Abstract : Many chiral drugs are used as the racemic mixtures in clinical practice. The occurrence of enantioselectively pharmacological activities calls for the development of enantiospecific analytical approaches during pharmacokinetic studies of enantiomers. Sample preparation plays a key role during quantitative analysis of biological samples. In current study, a rapid and reliable online solid phase extraction-chiral high performance liquid chromatography-tandem mass spectrometry (online SPE-chiral LC-MS/MS) method was developed for the simultaneously enantiospecific quantitation of (+)-trans-khellactone (dTK), (+/-)-cis-khellactone (d/lCK), (+/-)-praeruptorin A (d/lPA), (+/-)-praeruptorin B (d/lPB) and (+)-praeruptorin E (dPE), the main active angular-type pyranocoumarins (APs) in Peucedani Radix (Chinese name: Qian-hu) or the major metabolites of those APs, in rat plasma. The validation assay results described here show good selectivity and enantiospecificity, extraction efficiency, accuracy and precision with quantification limits (LOQs) of 2.57, 1.28, 1.28, 1.88, 4.16, 4.16 and 4.18ngmL-1 for dTK, lCK, dCK, dPA, dPB, lPB and dPE, respectively, while lPA was not detected in rat plasma due to the carboxylesterase(s)-mediated hydrolysis. In addition, the validated system was satisfactorily applied to characterize the pharmacokinetic properties of those components in normal and chronic obstructive pulmonary disease (COPD) rats following oral administration of Qian-hu extract. dCK and lCK were observed as the main herb-related compounds in plasma. Enantioselectively pharmacokinetic profiles occurred for dCK vs lCK, dPA vs lPA, and dPB vs lPB in either normal or COPD rats. The proposed whole system is expected to be a preferable analytical tool for in vivo study of chiral drugs, in particular for the characterization of enantioselectively pharmacokinetic profiles.
ESTHER : Song_2013_J.Pharm.Biomed.Anal_88C_269
PubMedSearch : Song_2013_J.Pharm.Biomed.Anal_88C_269
PubMedID: 24095802

Title : Discovery of novel 2,6-disubstituted pyridazinone derivatives as acetylcholinesterase inhibitors - Xing_2013_Eur.J.Med.Chem_63C_95
Author(s) : Xing W , Fu Y , Shi Z , Lu D , Zhang H , Hu Y
Ref : Eur Journal of Medicinal Chemistry , 63C :95 , 2013
Abstract : 2,6-Disubstituted pyridazinone 4 was identified by HTS as a novel acetylcholinesterase (AChE) inhibitor. Under SAR development, compound 17e stood out as displaying high AChE inhibitory activity and AChE/butyrylcholinesterase (BCHE) selectivity in vitro. Docking studies revealed that 17e might interact with the catalytic active site (CAS) and the peripheral anionic site (PAS) simultaneously. Based on this novel binding information, 6-ortho-tolylamino and N-ethyl-N-isopropylacetamide substituted piperidine were disclosed as new PAS and CAS binders.
ESTHER : Xing_2013_Eur.J.Med.Chem_63C_95
PubMedSearch : Xing_2013_Eur.J.Med.Chem_63C_95
PubMedID: 23466605

Title : The sequence and de novo assembly of the giant panda genome - Li_2010_Nature_463_311
Author(s) : Li R , Fan W , Tian G , Zhu H , He L , Cai J , Huang Q , Cai Q , Li B , Bai Y , Zhang Z , Zhang Y , Wang W , Li J , Wei F , Li H , Jian M , Nielsen R , Li D , Gu W , Yang Z , Xuan Z , Ryder OA , Leung FC , Zhou Y , Cao J , Sun X , Fu Y , Fang X , Guo X , Wang B , Hou R , Shen F , Mu B , Ni P , Lin R , Qian W , Wang G , Yu C , Nie W , Wang J , Wu Z , Liang H , Min J , Wu Q , Cheng S , Ruan J , Wang M , Shi Z , Wen M , Liu B , Ren X , Zheng H , Dong D , Cook K , Shan G , Zhang H , Kosiol C , Xie X , Lu Z , Li Y , Steiner CC , Lam TT , Lin S , Zhang Q , Li G , Tian J , Gong T , Liu H , Zhang D , Fang L , Ye C , Zhang J , Hu W , Xu A , Ren Y , Zhang G , Bruford MW , Li Q , Ma L , Guo Y , An N , Hu Y , Zheng Y , Shi Y , Li Z , Liu Q , Chen Y , Zhao J , Qu N , Zhao S , Tian F , Wang X , Wang H , Xu L , Liu X , Vinar T , Wang Y , Lam TW , Yiu SM , Liu S , Huang Y , Yang G , Jiang Z , Qin N , Li L , Bolund L , Kristiansen K , Wong GK , Olson M , Zhang X , Li S , Yang H
Ref : Nature , 463 :311 , 2010
Abstract : Using next-generation sequencing technology alone, we have successfully generated and assembled a draft sequence of the giant panda genome. The assembled contigs (2.25 gigabases (Gb)) cover approximately 94% of the whole genome, and the remaining gaps (0.05 Gb) seem to contain carnivore-specific repeats and tandem repeats. Comparisons with the dog and human showed that the panda genome has a lower divergence rate. The assessment of panda genes potentially underlying some of its unique traits indicated that its bamboo diet might be more dependent on its gut microbiome than its own genetic composition. We also identified more than 2.7 million heterozygous single nucleotide polymorphisms in the diploid genome. Our data and analyses provide a foundation for promoting mammalian genetic research, and demonstrate the feasibility for using next-generation sequencing technologies for accurate, cost-effective and rapid de novo assembly of large eukaryotic genomes.
ESTHER : Li_2010_Nature_463_311
PubMedSearch : Li_2010_Nature_463_311
PubMedID: 20010809
Gene_locus related to this paper: ailme-ABH15 , ailme-ACHE , ailme-BCHE , ailme-d2gtv3 , ailme-d2gty9 , ailme-d2gu87 , ailme-d2gu97 , ailme-d2gve7 , ailme-d2gwu1 , ailme-d2gx08 , ailme-d2gyt0 , ailme-d2gz36 , ailme-d2gz37 , ailme-d2gz38 , ailme-d2gz39 , ailme-d2gz40 , ailme-d2h5r9 , ailme-d2h7b7 , ailme-d2h9c9 , ailme-d2h794 , ailme-d2hau7 , ailme-d2hau8 , ailme-d2hcd9 , ailme-d2hdi6 , ailme-d2heu6 , ailme-d2hga4 , ailme-d2hqw5 , ailme-d2hs98 , ailme-d2hsx4 , ailme-d2hti6 , ailme-d2htv3 , ailme-d2htz6 , ailme-d2huc7 , ailme-d2hwj8 , ailme-d2hwy7 , ailme-d2hxm1 , ailme-d2hyc8 , ailme-d2hyv2 , ailme-d2hz11 , ailme-d2hza3 , ailme-d2hzr4 , ailme-d2i1l4 , ailme-d2i2g8 , ailme-g1l7m3 , ailme-g1lu36 , ailme-g1m769 , ailme-g1mc29 , ailme-g1mdj8 , ailme-g1mdr5 , ailme-g1mfp4 , ailme-g1mfx5 , ailme-g1lj41 , ailme-g1lm28 , ailme-g1l3u1 , ailme-g1l7l1 , ailme-g1m5i3 , ailme-g1l2f6 , ailme-g1lji5 , ailme-g1lqk3 , ailme-g1l8s9 , ailme-d2h717 , ailme-d2h718 , ailme-d2h719 , ailme-d2h720 , ailme-g1m5v0 , ailme-g1m5y7 , ailme-g1lkt7 , ailme-g1l2a1 , ailme-g1lsc8 , ailme-g1lrp4 , ailme-d2gv02 , ailme-g1mik5 , ailme-g1ljr1 , ailme-g1lxw7 , ailme-d2h8b5 , ailme-d2h2r2 , ailme-d2h9w7 , ailme-g1meh3 , ailme-g1m719

Title : The genome of the cucumber, Cucumis sativus L - Huang_2009_Nat.Genet_41_1275
Author(s) : Huang S , Li R , Zhang Z , Li L , Gu X , Fan W , Lucas WJ , Wang X , Xie B , Ni P , Ren Y , Zhu H , Li J , Lin K , Jin W , Fei Z , Li G , Staub J , Kilian A , van der Vossen EA , Wu Y , Guo J , He J , Jia Z , Tian G , Lu Y , Ruan J , Qian W , Wang M , Huang Q , Li B , Xuan Z , Cao J , Asan , Wu Z , Zhang J , Cai Q , Bai Y , Zhao B , Han Y , Li Y , Li X , Wang S , Shi Q , Liu S , Cho WK , Kim JY , Xu Y , Heller-Uszynska K , Miao H , Cheng Z , Zhang S , Wu J , Yang Y , Kang H , Li M , Liang H , Ren X , Shi Z , Wen M , Jian M , Yang H , Zhang G , Yang Z , Chen R , Ma L , Liu H , Zhou Y , Zhao J , Fang X , Fang L , Liu D , Zheng H , Zhang Y , Qin N , Li Z , Yang G , Yang S , Bolund L , Kristiansen K , Li S , Zhang X , Wang J , Sun R , Zhang B , Jiang S , Du Y
Ref : Nat Genet , 41 :1275 , 2009
Abstract : Cucumber is an economically important crop as well as a model system for sex determination studies and plant vascular biology. Here we report the draft genome sequence of Cucumis sativus var. sativus L., assembled using a novel combination of traditional Sanger and next-generation Illumina GA sequencing technologies to obtain 72.2-fold genome coverage. The absence of recent whole-genome duplication, along with the presence of few tandem duplications, explains the small number of genes in the cucumber. Our study establishes that five of the cucumber's seven chromosomes arose from fusions of ten ancestral chromosomes after divergence from Cucumis melo. The sequenced cucumber genome affords insight into traits such as its sex expression, disease resistance, biosynthesis of cucurbitacin and 'fresh green' odor. We also identify 686 gene clusters related to phloem function. The cucumber genome provides a valuable resource for developing elite cultivars and for studying the evolution and function of the plant vascular system.
ESTHER : Huang_2009_Nat.Genet_41_1275
PubMedSearch : Huang_2009_Nat.Genet_41_1275
PubMedID: 19881527
Gene_locus related to this paper: cucsa-a0a0a0ktw5 , cucsa-a0a0a0lnt6 , cucsa-a0a0a0kpn7 , cucsa-a0a0a0lvt9 , cucsa-a0a0a0kdx8 , cucsa-a0a0a0m228 , cucsa-a0a0a0kz31 , cucsa-a0a0a0k5t5 , cucsa-a0a0a0kfs7 , cucsa-a0a0a0kjj7 , cucsa-a0a0a0kzs7 , cucsa-a0a0a0l0a6 , cucsa-a0a0a0l4w4 , cucsa-a0a0a0lpz0 , cucsa-a0a0a0ls66

Title : Association between polymorphisms of microsomal epoxide hydrolase and COPD: results from meta-analyses - Hu_2008_Respirology_13_837
Author(s) : Hu G , Shi Z , Hu J , Zou G , Peng G , Ran P
Ref : Respirology , 13 :837 , 2008
Abstract : BACKGROUND AND OBJECTIVE: COPD is a complex polygenic disease in which gene-environment interactions are very important. The gene encoding microsomal epoxide hydrolase (EPHX1) is one of several candidate loci for COPD pathogenesis and is highly polymorphic. Based chi on the polymorphisms of EPHX1 gene (tyrosine/histidine 113, histidine/arginine 139), the population can be classified into four groups of putative EPHX1 phenotypes (fast, normal, slow and very slow). A number of studies have investigated the association between the genotypes and phenotypes of EPHX1 and COPD susceptibility in different populations, with inconsistent results. A systematic review and meta-analysis of the published data was performed to gain a clearer understanding of this association. METHODS: The MEDLINE database was searched for case-control studies published from 1966 to August 2007. Data were extracted and pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated. RESULTS: Sixteen eligible studies, comprising 1847 patients with COPD and 2455 controls, were included in the meta-analysis. The pooled result showed that the EPHX1 113 mutant homozygote was significantly associated with an increased risk of COPD (OR 1.59, 95% CI: 1.14-2.21). Subgroup analysis supported the result in the Asian population, but not in the Caucasian population. When the analysis was limited to only the larger-sample-size studies, studies in which controls were in Hardy-Weinberg equilibrium and studies in which controls were smokers/ex-smokers, the pooled results supported the conclusion. The EPHX1 139 heterozygote protected against the development of COPD in the Asian population, but not in the Caucasian population. The other gene types of EPHX1 113 and EPHX1 139 were not associated with an increased risk of COPD. The slow activity phenotype of EPHX1 was associated with an increased risk of COPD. The fast activity phenotype of EPHX1 was a protective factor for developing COPD in the Asian population, but not in the Caucasian population. However, the very slow activity phenotype of EPHX1 was a risk for developing COPD in the Caucasian population, but not in the Asian population. CONCLUSIONS: The polymorphisms of EPHX1 113 and EPHX1 139 are genetic contributors to COPD susceptibility in Asian populations. The phenotypes of EPHX1 were contributors to overall COPD susceptibility.
ESTHER : Hu_2008_Respirology_13_837
PubMedSearch : Hu_2008_Respirology_13_837
PubMedID: 18811882

Title : [Effects of high fluoride intake on the fluoride of femora, teeth and some biochemical indexes in rats] - Bai_1999_Wei.Sheng.Yan.Jiu_28_335
Author(s) : Bai X , Shi Z , Wu R
Ref : Wei Sheng Yan Jiu , 28 :335 , 1999
Abstract : In order to approach practicable indexes for assessing the effects of the products which are intended to be used to prevent endemic fluorosis, Wistar rats were fed with fluoridated water(50 mg/L) for four weeks. After only one week treated with fluoride, a higher activity of NAG(N-acetyl-beta-D-glucosaminidase) in urine, ChE(cholinesterase) in blood and increased urinary excretion of fluoride (compared with the control, P < 0.01) were observed, and these changes were lasted to the end of the fourth week of the study, but hydroxyproline in serum and urine had not been changed in both groups. After four weeks, the fluoride levels in the femora and teeth of fluoride treated group were ten times higher than that of the control group. According to the results, fluoride in bones and teeth must be taken as key indexes, the activities of NAG in urine and ChE in blood should be taken into consideration for assessing the effects of fluoride protagonist.
ESTHER : Bai_1999_Wei.Sheng.Yan.Jiu_28_335
PubMedSearch : Bai_1999_Wei.Sheng.Yan.Jiu_28_335
PubMedID: 12016982