微粒体谷胱甘肽S-转移酶1(microsomal glutathione S-transferase 1,MGST1)是谷胱甘肽S-转移酶(glutathione S-transferase,GST)超家族和花生四烯酸与谷胱甘肽代谢中的膜相关蛋白(membrane-associated proteins in eicosanoid and gluta...微粒体谷胱甘肽S-转移酶1(microsomal glutathione S-transferase 1,MGST1)是谷胱甘肽S-转移酶(glutathione S-transferase,GST)超家族和花生四烯酸与谷胱甘肽代谢中的膜相关蛋白(membrane-associated proteins in eicosanoid and glutathione metabolism,MAPEG)超家族的共同成员,它通过催化外源性物质的II相解毒过程,从而保护细胞膜免受氧化应激的损伤。众多研究发现MGST1与恶性肿瘤的发生发展密切相关,有望成为癌症治疗的新型分子靶点。本文就MGST1在恶性肿瘤中的研究进展予以综述。展开更多
目的用二代转录组测序(RNA-seq)技术,结合差异基因GO分析、KEGG富集分析,探讨谷胱甘肽转移酶(GST)在高脂饮食诱导的小鼠非酒精性脂肪性肝病(NAFLD)中的作用。方法14只雄性C57BL/6J小鼠随机抽样分为对照组(n=6)和模型组(n=8)。对照组小...目的用二代转录组测序(RNA-seq)技术,结合差异基因GO分析、KEGG富集分析,探讨谷胱甘肽转移酶(GST)在高脂饮食诱导的小鼠非酒精性脂肪性肝病(NAFLD)中的作用。方法14只雄性C57BL/6J小鼠随机抽样分为对照组(n=6)和模型组(n=8)。对照组小鼠喂养普通饲料;模型组喂养高脂饲料,连续7周,构建NAFLD模型。试剂盒检测血清ALT、AST活性及TG水平、苏木精-伊红(HE)和油红染色观察肝组织病理和脂滴沉积情况;提取肝组织RNA进行高通量转录组测序,将基因表达量差异倍数≥2.0且P<0.05定义为差异基因,筛选对照组与模型组肝组织差异基因,应用GO、KEGG数据库进行功能分析,并采用qRT-PCR验证差异基因表达。符合正态分布的计量资料两组比较采用独立样本t检验。结果对照组与模型组小鼠体质量、血清ALT、AST差异无统计学意义(P值均>0.05)。与对照组相比,模型组血清TG水平明显高于对照组[(2.02±0.50)mmol/L vs(1.00±0.29)mmol/L,t=-4.45,P=0.001]。HE染色提示:模型组可见弥漫性脂肪变性和气球样变。油红染色显示:模型组肝细胞胞浆内橘红色脂滴明显增多,且肝细胞脂肪变分级明显高于对照组(1.88±0.64 vs 1.00±0.00,t=-3.86,P=0.006)。转录组测序提示两组差异基因1367个,其中上调基因数608个、下调基因数759个;且两组中GST基因差异表达17个。选择差异倍数最明显的前10个GST基因进行验证。与对照组相比,GSTa2、GSTa3、GSTa4、GSTm1、GSTm2、GSTm3、GSTm4、GSTp1、GSTo1表达下调,GSTk1表达上调。实验结果与测序结果一致。结论GST通过参与类固醇代谢过程、脂肪酸代谢过程、胆固醇代谢过程等多个生物学过程影响脂质代谢,与NAFLD发病密切相关。展开更多
Activities of carboxylesterase and glutathione S transferase in Anoplophora glabripennis larvae feeding on eight different kinds of poplar trees were tested. The results showed that the activities of the two enzymes w...Activities of carboxylesterase and glutathione S transferase in Anoplophora glabripennis larvae feeding on eight different kinds of poplar trees were tested. The results showed that the activities of the two enzymes were significantly different when the larvae feeding on different poplar trees. The contents of fourteen secondary metabolites in eight kinds of poplar trees were also tested with the method of high pressure liquid chromatography (HPLC). Stepwise regression analysis was carried out to test the relationship between the activities of the enzymes and secondary metabolites of poplar trees. The analysis results demonstrated that the contents of benzoic acid and catechin decreased together with the increase of carboxylesterase activity while the contents of catechol increased, but the content of p hydroxybenzoic acid decreased together with the increasing of glutathione S transferase activity while the content of phenol, coumaric acid, syringic, salicylic acid and salicin in poplar trees increased.展开更多
文摘目的用二代转录组测序(RNA-seq)技术,结合差异基因GO分析、KEGG富集分析,探讨谷胱甘肽转移酶(GST)在高脂饮食诱导的小鼠非酒精性脂肪性肝病(NAFLD)中的作用。方法14只雄性C57BL/6J小鼠随机抽样分为对照组(n=6)和模型组(n=8)。对照组小鼠喂养普通饲料;模型组喂养高脂饲料,连续7周,构建NAFLD模型。试剂盒检测血清ALT、AST活性及TG水平、苏木精-伊红(HE)和油红染色观察肝组织病理和脂滴沉积情况;提取肝组织RNA进行高通量转录组测序,将基因表达量差异倍数≥2.0且P<0.05定义为差异基因,筛选对照组与模型组肝组织差异基因,应用GO、KEGG数据库进行功能分析,并采用qRT-PCR验证差异基因表达。符合正态分布的计量资料两组比较采用独立样本t检验。结果对照组与模型组小鼠体质量、血清ALT、AST差异无统计学意义(P值均>0.05)。与对照组相比,模型组血清TG水平明显高于对照组[(2.02±0.50)mmol/L vs(1.00±0.29)mmol/L,t=-4.45,P=0.001]。HE染色提示:模型组可见弥漫性脂肪变性和气球样变。油红染色显示:模型组肝细胞胞浆内橘红色脂滴明显增多,且肝细胞脂肪变分级明显高于对照组(1.88±0.64 vs 1.00±0.00,t=-3.86,P=0.006)。转录组测序提示两组差异基因1367个,其中上调基因数608个、下调基因数759个;且两组中GST基因差异表达17个。选择差异倍数最明显的前10个GST基因进行验证。与对照组相比,GSTa2、GSTa3、GSTa4、GSTm1、GSTm2、GSTm3、GSTm4、GSTp1、GSTo1表达下调,GSTk1表达上调。实验结果与测序结果一致。结论GST通过参与类固醇代谢过程、脂肪酸代谢过程、胆固醇代谢过程等多个生物学过程影响脂质代谢,与NAFLD发病密切相关。
文摘Activities of carboxylesterase and glutathione S transferase in Anoplophora glabripennis larvae feeding on eight different kinds of poplar trees were tested. The results showed that the activities of the two enzymes were significantly different when the larvae feeding on different poplar trees. The contents of fourteen secondary metabolites in eight kinds of poplar trees were also tested with the method of high pressure liquid chromatography (HPLC). Stepwise regression analysis was carried out to test the relationship between the activities of the enzymes and secondary metabolites of poplar trees. The analysis results demonstrated that the contents of benzoic acid and catechin decreased together with the increase of carboxylesterase activity while the contents of catechol increased, but the content of p hydroxybenzoic acid decreased together with the increasing of glutathione S transferase activity while the content of phenol, coumaric acid, syringic, salicylic acid and salicin in poplar trees increased.
