Yao X

References (18)

Title : Biotoxicity responses of Zebrafish in environmentally relevant concentration of Di (2-ethylhexyl) phthalate - Li_2024_Environ.Toxicol.Pharmacol__104423
Author(s) : Li X , Hu S , Jiang N , Yao X , Wang C , Wang Q , Yang Z , Wang J
Ref : Environ Toxicol Pharmacol , :104423 , 2024
Abstract : As an emerging environmental contaminant, di (2-ethylhexyl) phthalate (DEHP) is widely present in the aquatic environment, however, the effects and underlying mechanisms of DEHP on the aquatic organisms are poorly understood. This study systematically investigated the ecotoxicity induced by chronic exposure to environmental relevant concentrations of DEHP (0.03mg/L, 0.1mg/L, and 0.3mg/L) on zebrafish brain. Results indicated that DEHP exposure significantly increased the levels of ROS and disturbance of the antioxidant enzymes activities in the brain, which may further enhance lipid peroxidation and DNA damage. Furthermore, acetylcholinesterase activity was first stimulated and inhibited by exposure to DEHP, and the antioxidant and apoptosis related genes were mainly upregulated. Risk assessment indicated that the ecotoxicity of DEHP on the zebrafish showed an "enhancement-reduction" trend as the exposure time was prolonged. Overall, these results provided new insights and useful information to ecological risk assessment and environmental management of DEHP pollution.
ESTHER : Li_2024_Environ.Toxicol.Pharmacol__104423
PubMedSearch : Li_2024_Environ.Toxicol.Pharmacol__104423
PubMedID: 38521434

Title : Neuroprotective effects of dipeptidyl peptidase 4 inhibitor on Alzheimer's disease: a narrative review - Jiang_2024_Front.Pharmacol_15_1361651
Author(s) : Jiang X , Li J , Yao X , Ding H , Gu A , Zhou Z
Ref : Front Pharmacol , 15 :1361651 , 2024
Abstract : Insulin resistance in brain and amyloidogenesis are principal pathological features of diabetes-related cognitive decline and development of Alzheimer's disease (AD). A growing body of evidence suggests that maintaining glucose under control in diabetic patients is beneficial for preventing AD development. Dipeptidyl peptidase 4 inhibitors (DDP4is) are a class of novel glucose-lowering medications through increasing insulin excretion and decreasing glucagon levels that have shown neuroprotective potential in recent studies. This review consolidates extant evidence from earlier and new studies investigating the association between DPP4i use, AD, and other cognitive outcomes. Beyond DPP4i's benefits in alleviating insulin resistance and glucose-lowering, underlying mechanisms for the potential neuroprotection with DPP4i medications were categorized into the following sections: (Ferrari et al., Physiol Rev, 2021, 101, 1,047-1,081): the benefits of DPP4is on directly ameliorating the burden of beta-amyloid plaques and reducing the formation of neurofibrillary tangles; DPP4i increasing the bioactivity of neuroprotective DPP4 substrates including glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic peptide (GIP), and stromal-derived factor-1alpha (SDF-1alpha) etc.; pleiotropic effects of DPP4is on neuronal cells and intracerebral structure including anti-inflammation, anti-oxidation, and anti-apoptosis. We further revisited recently published epidemiological studies that provided supportive data to compliment preclinical evidence. Given that there remains a lack of completed randomized trials that aim at assessing the effect of DPP4is in preventing AD development and progression, this review is expected to provide a useful insight into DPP4 inhibition as a potential therapeutic target for AD prevention and treatment. The evidence is helpful for informing the rationales of future clinical research and guiding evidence-based clinical practice.
ESTHER : Jiang_2024_Front.Pharmacol_15_1361651
PubMedSearch : Jiang_2024_Front.Pharmacol_15_1361651
PubMedID: 38405664

Title : The effect of double filtration plasmapheresis and corticosteroids on patients with anti-dipeptidyl-peptidase-like protein 6 encephalitis - Wan_2024_Ther.Apher.Dial_28_141
Author(s) : Wan W , Pan Y , Chen Y , Bai S , Yao X , Lin Y , Wu J , Ni L , Mei Y , Qiu H , Zhou Y , Hao Y , Guan Y
Ref : Ther Apher Dial , 28 :141 , 2024
Abstract : INTRODUCTION: Anti-dipeptidyl-peptidase-like protein 6 (DPPX) encephalitis is a rare condition with varied symptoms including gastrointestinal issues, weight loss, cognitive and mental dysfunction, and hyperexcitability of the central nervous system. METHODS: We studied five patients with anti-DPPX encephalitis who received immunotherapy, specifically DFPP, at our hospital. We analyzed their clinical symptoms, lab results, electrophysiological and imaging findings, and outcomes with immunotherapy. RESULTS: Patients presented with cognitive dysfunction, tremor, seizures, psychiatric disturbances, and cerebellar and brainstem dysfunction. Magnetic resonance imaging (MRI) showed brain abnormalities in one patient and elevated cerebrospinal fluid (CSF) protein levels in two patients. Antibodies against DPPX were detected in all patients and in CSF in two patients. One patient had antibodies against anti-CV2/contactin response mediator protein 5 (CRMP5). All patients responded well to DFPP and corticosteroids. CONCLUSION: DFPP may be an effective treatment for anti-DPPX encephalitis. Further research is needed to understand disease progression and evaluate immunotherapy efficacy.
ESTHER : Wan_2024_Ther.Apher.Dial_28_141
PubMedSearch : Wan_2024_Ther.Apher.Dial_28_141
PubMedID: 37461148
Gene_locus related to this paper: human-DPP6

Title : The effect of double filtration plasmapheresis and corticosteroids on patients with anti-dipeptidyl-peptidase-like protein 6 encephalitis - Wan_2023_Ther.Apher.Dial__
Author(s) : Wan W , Pan Y , Chen Y , Bai S , Yao X , Lin Y , Wu J , Ni L , Mei Y , Qiu H , Zhou Y , Hao Y , Guan Y
Ref : Ther Apher Dial , : , 2023
Abstract : INTRODUCTION: Anti-dipeptidyl-peptidase-like protein 6 (DPPX) encephalitis is a rare condition with varied symptoms including gastrointestinal issues, weight loss, cognitive and mental dysfunction, and hyperexcitability of the central nervous system. METHODS: We studied five patients with anti-DPPX encephalitis who received immunotherapy, specifically DFPP, at our hospital. We analyzed their clinical symptoms, lab results, electrophysiological and imaging findings, and outcomes with immunotherapy. RESULTS: Patients presented with cognitive dysfunction, tremor, seizures, psychiatric disturbances, and cerebellar and brainstem dysfunction. Magnetic resonance imaging (MRI) showed brain abnormalities in one patient and elevated cerebrospinal fluid (CSF) protein levels in two patients. Antibodies against DPPX were detected in all patients and in CSF in two patients. One patient had antibodies against anti-CV2/contactin response mediator protein 5 (CRMP5). All patients responded well to DFPP and corticosteroids. CONCLUSION: DFPP may be an effective treatment for anti-DPPX encephalitis. Further research is needed to understand disease progression and evaluate immunotherapy efficacy.
ESTHER : Wan_2023_Ther.Apher.Dial__
PubMedSearch : Wan_2023_Ther.Apher.Dial__
PubMedID: 37461148
Gene_locus related to this paper: human-DPP6

Title : Exogenous methyl jasmonate induced cassava defense response and enhanced resistance to Tetranychus urticae - Zhang_2023_Exp.Appl.Acarol__
Author(s) : Zhang Y , Liu Y , Liang X , Wu C , Liu X , Wu M , Yao X , Qiao Y , Zhan X , Chen Q
Ref : Exp Appl Acarol , : , 2023
Abstract : Exogenous application of methyl jasmonate (MeJA) could activate plant defense response against the two-spotted spider mite (TSSM), Tetranychus urticae Koch,sin different plants. However, whether MeJA can also serve as an elicitor in cassava (Manihot esculenta Crantz) remains unknown. In this study, induced defense responses were investigated in TSSM-resistant cassava variety C1115 and TSSM-susceptible cassava variety KU50 when applied with MeJA. The performance of TSSM feeding on cassava plants that werespre-treated with various concentrations of MeJA was first evaluated. Subsequently, the activities of antioxidative enzymes (superoxide dismutase and catalase), detoxification enzymes (glutathione S-transferase, cytochrome P450 and carboxylesterase) and digestive enzymes (protease, amylase and invertase) in TSSM were analyzed at days 1, 2, 4 and 8 post-feeding. The results showed that MeJA treatment can induce cassava defense responses to TSSM in terms of reducing egg production and adult longevity as well as slowing development and prolonging thesegg stage. Noticeably, C1115 exhibited stronger inhibition of TSSM development and reproduction than KU50. In addition, the activities of all the tested enzymes were induced in both C1115 and KU50, the most in C1115. We conclude that exogenous methyl jasmonate can induce cassava defense responses and enhance resistance to TSSM.
ESTHER : Zhang_2023_Exp.Appl.Acarol__
PubMedSearch : Zhang_2023_Exp.Appl.Acarol__
PubMedID: 36635606

Title : Metabolism and Interspecies Variation of IMMH-010, a Programmed Cell Death Ligand 1 Inhibitor Prodrug - Wang_2021_Pharmaceutics_13_
Author(s) : Wang Y , Liu X , Zou X , Wang S , Luo L , Liu Y , Dong K , Yao X , Li Y , Chen X , Sheng L
Ref : Pharmaceutics , 13 : , 2021
Abstract : IMMH-010 is an ester prodrug of YPD-29B, a potent programmed cell death ligand 1 (PD-L1) inhibitor. The metabolism of IMMH-010 was investigated and compared in various species. Four metabolites of IMMH-010 were identified, and the major metabolite was the parent compound, YPD-29B, which was mainly catalyzed by carboxylesterase 1 (CES1). We observed IMMH-010 metabolism in the plasma of various species. IMMH-010 was rapidly metabolized to YPD-29B in rat and mouse plasma, whereas it remained stable in human and monkey plasma. In the liver S9 fractions of human, monkey, dog, and rat, IMMH-010 was quickly transformed to YPD-29B with no obvious differences among species. In addition, the transformation ratio of IMMH-010 to YPD-29B was low in rat and human intestines, which indicated that the intestine was not an important site for IMMH-010 hydrolysis. Moreover, we demonstrated the remarkable antitumor efficacy of IMMH-010 in B16F10 melanoma and MC38 colon carcinoma xenograft mouse models. We also compared the pharmacokinetic profiles of IMMH-010 in rodents and primates. After oral administration of IMMH-010, the general exposure of active metabolite YPD-29B was slightly lower in primates than in rodents, suggesting that data should be extrapolated cautiously from rodents to humans.
ESTHER : Wang_2021_Pharmaceutics_13_
PubMedSearch : Wang_2021_Pharmaceutics_13_
PubMedID: 33919384

Title : Isolation, sequencing of the HvnHID gene and its role in the purple-grain colour development in Tibetan hulless barley - Yao_2021_Czech.J.Genet.Plant.Breed__
Author(s) : Yao X , Su L , Yao Y , An L , Bai Y , Li X , Wu K
Ref : _Czech J Genet Plant Breed , : , 2021
Abstract : 2-hydroxyisoflavanone dehydratase (HID) plays an important role in isoflavone biosynthesis. In this study, HID was isolated from the seeds of the purple-grained Tibetan hulless barley variety Nerumuzha and the white-grained variety Kunlun 10. The HvnHID gene includes the 981 bp open reading frame and encodes a protein of 327 amino acids. It has a typical Abhydrolase_3 domain (78-306) and belongs to the carboxylesterase (CXE) family of the Abhydrolase_3 (alpha/beta hydrolase) superfamily. There are eight nucleotide differences in the HvnHID coding sequence and two amino acid differences (one in the Abhydrolase_3 domain) between Nerumuzha and Kunlun 10. The HvnHID of hulless barley has the closest relationship with the HID in Hordeum vulgare, and the most distant relationship in Panicum hallii. At the early-mid stage of the seed colour development, the HvnHID expression levels in the purple and black seeds were significantly higher than in the white and blue ones (P < 0.01). During the seed colour development of purple-grained hulless barley, the expression of the key genes (HvnF3'H, HvnDRF, HvnANT1, and HvnGT) in the anthocyanidin biosynthetic pathway increased significantly, while the HvnHID expression decreased significantly (P < 0.01). Thus, it is likely that HvnHID negatively regulates the anthocyanidin biosynthesis. This result provides an important basis for further study of the biological functions of HvnHID in the anthocyanidin biosynthetic pathway.
ESTHER : Yao_2021_Czech.J.Genet.Plant.Breed__
PubMedSearch : Yao_2021_Czech.J.Genet.Plant.Breed__
PubMedID:
Gene_locus related to this paper: horvv-f2da29

Title : Musa balbisiana genome reveals subgenome evolution and functional divergence - Wang_2019_Nat.Plants_5_810
Author(s) : Wang Z , Miao H , Liu J , Xu B , Yao X , Xu C , Zhao S , Fang X , Jia C , Wang J , Zhang J , Li J , Xu Y , Ma W , Wu Z , Yu L , Yang Y , Liu C , Guo Y , Sun S , Baurens FC , Martin G , Salmon F , Garsmeur O , Yahiaoui N , Hervouet C , Rouard M , Laboureau N , Habas R , Ricci S , Peng M , Guo A , Xie J , Li Y , Ding Z , Yan Y , Tie W , D'Hont A , Hu W , Jin Z
Ref : Nat Plants , 5 :810 , 2019
Abstract : Banana cultivars (Musa ssp.) are diploid, triploid and tetraploid hybrids derived from Musa acuminata and Musa balbisiana. We presented a high-quality draft genome assembly of M. balbisiana with 430 Mb (87%) assembled into 11 chromosomes. We identified that the recent divergence of M. acuminata (A-genome) and M. balbisiana (B-genome) occurred after lineage-specific whole-genome duplication, and that the B-genome may be more sensitive to the fractionation process compared to the A-genome. Homoeologous exchanges occurred frequently between A- and B-subgenomes in allopolyploids. Genomic variation within progenitors resulted in functional divergence of subgenomes. Global homoeologue expression dominance occurred between subgenomes of the allotriploid. Gene families related to ethylene biosynthesis and starch metabolism exhibited significant expansion at the pathway level and wide homoeologue expression dominance in the B-subgenome of the allotriploid. The independent origin of 1-aminocyclopropane-1-carboxylic acid oxidase (ACO) homoeologue gene pairs and tandem duplication-driven expansion of ACO genes in the B-subgenome contributed to rapid and major ethylene production post-harvest in allotriploid banana fruits. The findings of this study provide greater context for understanding fruit biology, and aid the development of tools for breeding optimal banana cultivars.
ESTHER : Wang_2019_Nat.Plants_5_810
PubMedSearch : Wang_2019_Nat.Plants_5_810
PubMedID: 31308504
Gene_locus related to this paper: musam-m0tuu7 , musam-a0a804kav5

Title : FAM172A modulates apoptosis and proliferation of colon cancer cells via STAT1 binding to its promoter - Qian_2016_Oncol.Rep_35_1273
Author(s) : Qian K , Zhang J , Lu J , Liu W , Yao X , Chen Q , Lu S , Xiang G , Liu H
Ref : Oncol Rep , 35 :1273 , 2016
Abstract : In our previous study, low expression of FAM172A protein was found in colon cancer tissues. This research was planned to explore the functions of FAM172A gene and examine the mechanisms of its transcriptional regulation. Firstly, flow cytometry showed that FAM172A inhibited proliferation and promoted apoptosis and differentiation of colon cancer cells. Then through continuous truncation, we identified the minimal functional promoter region of FAM172A. Subsequently, we found that STAT1, as a transcription factor, could bind to the minimal FAM172A promoter, as evaluated using Chromatin immunoprecipitation (ChIP) and Electrophoreticmobility shift assay (EMSA). The results of Western blot analysis and qRT-PCR indicated that STAT1 was able to upregulate the expression of FAM172A. Our results showed that FAM172A could suppress proliferation of colon cancer cells, and STAT1 could bind to the minimum promoter region of FAM172A and upregulated the expression of FAM172A. These results may provide advanced insights into the functions of FAM172A and its regulatory mechanisms.
ESTHER : Qian_2016_Oncol.Rep_35_1273
PubMedSearch : Qian_2016_Oncol.Rep_35_1273
PubMedID: 26676844
Gene_locus related to this paper: human-f172a

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

Title : Tacrine induces apoptosis through lysosome- and mitochondria-dependent pathway in HepG2 cells - Gao_2014_Toxicol.In.Vitro_28_667
Author(s) : Gao C , Ding Y , Zhong L , Jiang L , Geng C , Yao X , Cao J
Ref : Toxicol In Vitro , 28 :667 , 2014
Abstract : Tacrine (THA) is a competitive inhibitor of cholinesterase. Administration of THA for the treatment of Alzheimer's disease results in a reversible hepatotoxicity in 30-50% of patients, as indicated by elevated alanine aminotransferase levels. However, the intracellular mechanisms have not yet been elucidated. In our previous study, we found that THA induced cytotoxicity and mitochondria dysfunction by ROS generation and 8-OHdG formation in mitochondrial DNA in HepG2 cells. In this study, the mechanism underlying was further investigated. Our results demonstrated that THA induced dose-dependent apoptosis with cytochrome c release and activation of caspase-3. THA-induced apoptosis was inhibited by treating cells with a ROS inhibitor, YCG063. In addition, we observed that THA led to an early lysosomal membrane permeabilization and release of cathepsin B. Pretreatment with CA-074Me, a specific cathepsin B inhibitor resulted in a significant but not complete decrease in tacrine-induced apoptosis. These data suggest that tacrine-induced cell apoptosis involves both mitochondrial damage and lysosomal membrane destabilization, and ROS is the critical factor that integrates tacrine-induced mitochondrial and lysosomal death pathways.
ESTHER : Gao_2014_Toxicol.In.Vitro_28_667
PubMedSearch : Gao_2014_Toxicol.In.Vitro_28_667
PubMedID: 24560791

Title : JZL184 is anti-hyperalgesic in a murine model of cisplatin-induced peripheral neuropathy - Khasabova_2014_Pharmacol.Res_90_67
Author(s) : Khasabova IA , Yao X , Paz J , Lewandowski CT , Lindberg AE , Coicou L , Burlakova N , Simone DA , Seybold VS
Ref : Pharmacol Res , 90 :67 , 2014
Abstract : Cisplatin has been used effectively to treat a variety of cancers but its use is limited by the development of painful peripheral neuropathy. Because the endocannabinoid 2-arachidonoyl-sn-glycerol (2-AG) is anti-hyperalgesic in several preclinical models of chronic pain, the anti-hyperalgesic effect of JZL184, an inhibitor of 2-AG hydrolysis, was tested in a murine model of cisplatin-induced hyperalgesia. Systemic injection of cisplatin (1mg/kg) produced mechanical hyperalgesia when administered daily for 7 days. Daily peripheral administration of a low dose of JZL184 in conjunction with cisplatin blocked the expression of mechanical hyperalgesia. Acute injection of a cannabinoid (CB)-1 but not a CB2 receptor antagonist reversed the anti-hyperalgesic effect of JZL184 indicating that downstream activation of CB1 receptors suppressed the expression of mechanical hyperalgesia. Components of endocannabinoid signaling in plantar hind paw skin and lumbar dorsal root ganglia (DRGs) were altered by treatments with cisplatin and JZL184. Treatment with cisplatin alone reduced levels of 2-AG and AEA in skin and DRGs as well as CB2 receptor protein in skin. Combining treatment of JZL184 with cisplatin increased 2-AG in DRGs compared to cisplatin alone but had no effect on the amount of 2-AG in skin. Evidence that JZL184 decreased the uptake of [(3)H]AEA into primary cultures of DRGs at a concentration that also inhibited the enzyme fatty acid amide hydrolase, in conjunction with data that 2-AG mimicked the effect of JZL184 on [(3)H]AEA uptake support the conclusion that AEA most likely mediates the anti-hyperalgesic effect of JZL184 in this model.
ESTHER : Khasabova_2014_Pharmacol.Res_90_67
PubMedSearch : Khasabova_2014_Pharmacol.Res_90_67
PubMedID: 25304184

Title : Genome analysis reveals insights into physiology and longevity of the Brandt's bat Myotis brandtii - Seim_2013_Nat.Commun_4_2212
Author(s) : Seim I , Fang X , Xiong Z , Lobanov AV , Huang Z , Ma S , Feng Y , Turanov AA , Zhu Y , Lenz TL , Gerashchenko MV , Fan D , Hee Yim S , Yao X , Jordan D , Xiong Y , Ma Y , Lyapunov AN , Chen G , Kulakova OI , Sun Y , Lee SG , Bronson RT , Moskalev AA , Sunyaev SR , Zhang G , Krogh A , Wang J , Gladyshev VN
Ref : Nat Commun , 4 :2212 , 2013
Abstract : Bats account for one-fifth of mammalian species, are the only mammals with powered flight, and are among the few animals that echolocate. The insect-eating Brandt's bat (Myotis brandtii) is the longest-lived bat species known to date (lifespan exceeds 40 years) and, at 4-8 g adult body weight, is the most extreme mammal with regard to disparity between body mass and longevity. Here we report sequencing and analysis of the Brandt's bat genome and transcriptome, which suggest adaptations consistent with echolocation and hibernation, as well as altered metabolism, reproduction and visual function. Unique sequence changes in growth hormone and insulin-like growth factor 1 receptors are also observed. The data suggest that an altered growth hormone/insulin-like growth factor 1 axis, which may be common to other long-lived bat species, together with adaptations such as hibernation and low reproductive rate, contribute to the exceptional lifespan of the Brandt's bat.
ESTHER : Seim_2013_Nat.Commun_4_2212
PubMedSearch : Seim_2013_Nat.Commun_4_2212
PubMedID: 23962925
Gene_locus related to this paper: myobr-s7mf99 , myobr-s7n4r2 , myobr-s7neb7 , myobr-s7ney7 , myobr-s7n9l2 , myobr-s7nk13 , myobr-s7mh20 , myobr-s7pbt8 , myobr-s7mux2 , myobr-s7mjb5 , myobr-s7n6x5 , myobr-s7nnt6 , myobr-s7n728.2 , myobr-s7n728.3 , myobr-s7n8d2 , myobr-s7nqw0 , myobr-s7mju4 , myolu-g1nth4 , myobr-s7mij5 , myobr-s7pr94 , myolu-g1q4e3 , myolu-g1p353

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

Title : A novel chemiluminescence assay of organophosphorous pesticide quinalphos residue in vegetable with luminol detection - Hu_2010_Chem.Cent.J_4_13
Author(s) : Hu H , Liu X , Jiang F , Yao X , Cui X
Ref : Chem Cent J , 4 :13 , 2010
Abstract : BACKGROUND Organophosphorous pesticides are the most popular pesticides used in agriculture. As acetylcholinesterase inhibitors, organophosphorous pesticides are toxic organic chemicals. The control and detection of organophosphorous pesticide residue in food, water, and environment therefore plays a very important role in maintaining physical health. A sensitive, rapid, simple chemiluminescence(CL) method has been developed for the determination of quinalphos based on the reaction of quinalphos with luminol-H2O2 in an alkaline medium. The method has been applied to detection of quinalphos in vegetable samples with satisfactory results. RESULTS: The CL method for the determination of organophosphorous pesticide quinalphos is based on the phenomenon that quinalphos can apparently enhance the CL intensity of the luminol-H2O2 system. The optimal conditions were: luminol concentration 5.0 x 10-4 mol/L, H2O2 concentration 0.05 mol/L.pH value 13. In order to restrain the interference from metal ions, 1.0 x 10-3 mol/L of EDTA was added to the luminol solution. The possible mechanism was proposed. CONCLUSION: Under the optimum reaction conditions, CL was linear with the concentration of quinalphos in the range of 0.02 mug/mL -1.0 mug/mL and the detection limit was 0.0055 mug/mL (3sigma). This method has been successfully applied to the detection of quinalphos in vegetable samples. According to the experimental data, the average recoveries for quinalphos in cherry tomato and green pepper 97.20% and 90.13%. Meanwhile, the possible mechanism was proposed.
ESTHER : Hu_2010_Chem.Cent.J_4_13
PubMedSearch : Hu_2010_Chem.Cent.J_4_13
PubMedID: 20576096

Title : Functional co-expression of two insect nicotinic receptor subunits (Nlalpha3 and Nlalpha8) reveals the effects of a resistance-associated mutation (Nlalpha3) on neonicotinoid insecticides - Yixi_2009_J.Neurochem_110_1855
Author(s) : Yixi Z , Liu Z , Han Z , Song F , Yao X , Shao Y , Li J , Millar NS
Ref : Journal of Neurochemistry , 110 :1855 , 2009
Abstract : Neonicotinoid insecticides, such as imidacloprid, are selective agonists of insect nicotinic acetylcholine receptors (nAChRs) and are used extensively to control a variety of insect pest species. Previously, we have identified a nAChR point mutation (Y151S) associated with insecticide resistance in the brown planthopper Nilaparvata lugens. Although this mutation has been identified in two different N. lugens nAChR subunits (Nlalpha1 and Nlalpha3) because of difficulties in heterologous expression of Nlalpha3; its influence on agonist potency has been examined only in Nlalpha1-containing nAChRs. Here we describe the cloning of a novel nAChR subunit from N. lugens (Nlalpha8), together with evidence for its co-assembly with Nlalpha3 in native and recombinant nAChRs. This has, for the first time, enabled the functional effects of the Nlalpha3(Y151S) mutation to be examined. The Nlalpha3(Y151S) mutation has little effect on agonist potency of acetylcholine but has a dramatic effect on neonicotinoid insecticides (reducing I(max) values and increasing EC(50) values). The apparent affinity of neonicotinoids was higher and the effect of the Y151S mutation on neonicotinoid agonist potency was more profound in Nlalpha3-containing, rather than Nlalpha1-containing nAChR. We conclude that Nlalpha3- and Nlalpha1-containing nAChRs may be representative of two distinct insect nAChR populations.
ESTHER : Yixi_2009_J.Neurochem_110_1855
PubMedSearch : Yixi_2009_J.Neurochem_110_1855
PubMedID: 19627438

Title : Heteromeric co-assembly of two insect nicotinic acetylcholine receptor alpha subunits: influence on sensitivity to neonicotinoid insecticides - Liu_2009_J.Neurochem_108_498
Author(s) : Liu Z , Han Z , Zhang Y , Song F , Yao X , Liu S , Gu J , Millar NS
Ref : Journal of Neurochemistry , 108 :498 , 2009
Abstract : Neonicotinoid insecticides, such as imidacloprid, are selective agonists of insect nicotinic acetylcholine receptors (nAChRs) and are used extensively in areas of crop protection and animal health to control a variety of insect pest species. Here, we describe studies performed with nAChR subunits Nlalpha1 and Nlalpha2 cloned from the brown planthopper Nilaparvata lugens, a major insect pest of rice crops in many parts of Asia. The influence of Nlalpha1 and Nlalpha2 subunits upon the functional properties of recombinant nAChRs has been examined by expression in Xenopus oocytes. In addition, the influence of a Nlalpha1 mutation (Y151S), which has been linked to neonicotinoid lab generated resistance in N. lugens, has been examined. As in previous studies of insect alpha subunits, functional expression has been achieved by co-expression with the mammalian beta2 subunit. This approach has revealed a significantly higher apparent affinity of imidacloprid for Nlalpha1/beta2 than for Nlalpha2/beta2 nAChRs. In addition, evidence has been obtained for the co-assembly of Nlalpha1 and Nlalpha2 subunits into 'triplet' nAChRs of subunit composition Nlalpha1/Nlalpha2/beta2. Evidence has also been obtained which demonstrates that the resistance-associated Y151S mutation has a significantly reduced effect on neonicotinoid agonist activity when Nlalpha1 is co-assembled with Nlalpha2 than when expressed as the sole alpha subunit in a heteromeric nAChR. These findings may be of importance in assessing the likely impact of the target-site mutations such as Y151S upon neonicotinoid insecticide resistance in insect field populations.
ESTHER : Liu_2009_J.Neurochem_108_498
PubMedSearch : Liu_2009_J.Neurochem_108_498
PubMedID: 19046356

Title : Molecular cloning and characterization of a juvenile hormone esterase gene from brown planthopper, Nilaparvata lugens - Liu_2008_J.Insect.Physiol_54_1495
Author(s) : Liu S , Yang B , Gu J , Yao X , Zhang Y , Song F , Liu Z
Ref : J Insect Physiol , 54 :1495 , 2008
Abstract : Juvenile hormone (JH) plays key roles in the regulation of growth, development, diapause and reproduction in insects, and juvenile hormone esterase (JHE) plays an important role in regulating JH titers. We obtained a full-length cDNA encoding JHE in Nilaparvata lugens (NlJHE), the first JHE gene cloned from the hemipteran insects. The deduced protein sequence of Nljhe contains the five conserved motifs identified in JHEs of other insect species, including a consensus GQSAG motif that is required for the enzymatic activity of JHE proteins. Nljhe showed high amino acid similarities with Athalia rosae JHE (40%) and Apis mellifera JHE (39%). Recombinant NlJHE protein expressed in the baculovirus expression system hydrolyzed [3H] JH III at high activity and yielded the specificity constants (kcat/KM=4.28x10(6) M(-1) s(-1)) close to those of the validated JHEs from other insect species, indicating that Nljhe cDNA encodes a functional JH esterase. The Nljhe transcript was expressed mainly in the fat body and the expression level reached a peak at 48 h after ecdysis of the 5th instar nymphs. In the 5th instar, macropterous insects showed significantly higher Nljhe mRNA levels and JHE activities, but much lower JH III levels, than those detected in the brachypterous insects soon after ecdysis and at 48 h after ecdysis. These data suggest that NlJHE might play important roles in regulation of JH levels and wing form differentiation.
ESTHER : Liu_2008_J.Insect.Physiol_54_1495
PubMedSearch : Liu_2008_J.Insect.Physiol_54_1495
PubMedID: 18804476
Gene_locus related to this paper: nillu-b8q962