栀子酸调节胆汁淤积大鼠SHP-LRH-1信号通路的实验研究  

Effect of geniposidic acid on SHP-LRH-1 signaling pathway in cholestasis rats

作　　者：陈浩 高璇 赵威[2] 俞浩 王宁生[2] 宓穗卿[2] CHEN Hao;GAO Xuan;ZHAO Wei;YU Hao;WANG Ningsheng;MI Suiqing(College of Life and Health Sciences, Anhui Science and Technology University, Fengyang Anhui 233100;Department of Pharmacokinetics, Institute of clinical pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China)

机构地区：[1]安徽科技学院生命与健康科学学院,安徽凤阳233100 [2]广州中医药大学临床药理研究所药物代谢动力学研究室,广州510405

出　　处：《中南大学学报（医学版）》2019年第6期605-613,共9页Journal of Central South University ：Medical Science

基　　金：国家自然科学基金(81403268);安徽省教育厅高校自然科学研究重点项目(KJ2018A0528);安徽科技学院稳定高层次人才项目(SPYJ201701)~~

摘　　要：目的:研究栀子酸(geniposidic acid,GPA)对α-萘异硫氰酸酯(α-naphthyl isothiocyanate,ANIT)诱导胆汁淤积大鼠胆汁酸代谢小分子异源二聚体伴侣受体(small heterodimer partner,SHP)与肝受体同源物1(liver receptor homologue 1,LRH-1)信号通路的调节.方法:将50只SD大鼠随机分为5组,分别为空白组、ANIT组、ANIT+GPA 100 mg/kg组(AG100组)、ANIT+GPA 50 mg/kg组(AG50组)、ANIT+GPA 25 mg/kg组(AG25组),每组10只,连续给药10 d,空白组和ANIT组用生理盐水灌胃,ANIT+GPA各组给予GPA,给药的第8天,除空白组外,其余各组用ANIT(65 mg/kg)灌胃1次造模,继续给药至第10天,测血清总胆固醇(total cholesterol,TC)、三酰甘油(triglyceride,TG)和总胆汁酸(total bile acids,TBA)的含量;分离并培养大鼠原代肝细胞(rat primary hepatocytes,RPH),将RPH分为空白组、40μmol/L ANIT组、40μmol/L ANIT+GPA 4.00,1.00,0.25 mmol/L组(A4G,A1G和A0.25G组),real-time RT-PCR检测RPH中SHP和胆汁酸合成关键酶胆固醇7α羟化酶(cytochrome P450 family 7 subfamily A member 1,CYP7a1)mRNA转录水平,蛋白印迹法检测SHP和CYP7a1蛋白表达;沉默实验中,将RPH分为空白对照组、阴性转染组、siRNA-LRH-1组(ZR组)、siRNA-LRH-1+GPA 4.00,1.00,0.25 mmol/L组(ZR4G、ZR1G、ZR0.25G组),检测SHP,CYP7a1和LRH-1蛋白和基因的表达;过表达实验中,将RPH又分为空白对照组、阴性转染组(空白转染siRNA-阴性组)、LRH-1过表达组(LRH-1过表达质粒,OE组)、LRH-1过表达质粒+GPA 4.00,1.00,0.25 mmol/L组(OE4G,OE1G,OE0.25G组),检测SHP,CYP7a1和LRH-1蛋白和基因的表达.结果:在体实验中,与空白对照组比较,ANIT组的TC和TBA均显著升高(均P<0.01)、TG无差别;与ANIT组比较,AG100组和AG50组的TC和TBA均显著降低(均P<0.01).RPH实验中,与空白对照组比较,ANIT组中SHP的蛋白和基因水平均显著降低(均P<0.01),CYP7a1的蛋白和基因水平均显著升高(均P<0.01);与ANIT组比较,A4G和A1G组的SHP基因和蛋白水平均显著升高(均P<0.01),A0.25G组SHPObjective: To explore the effect of geniposidic acid (GPA) on the signal pathway of small heterodimer dimer receptor (SHP) and liver receptor homologue 1 (LRH-1) in cholestasis rats induced by alpha-naphthalene isothiocyanate (ANIT). Methods: Fifty SD rats were randomly divided into five groups: a blank group, an ANIT group, an ANIT+GPA (100 mg/kg) group, an ANIT+GPA (50 mg/kg) group, and an ANIT+GPA (25 mg/kg) group (n=10 in each group). The GPA were intragastrically given to rats for 10 days, and the control group and the ANIT group were given normal saline. At the eighth day of administration, all rats except the blank group were given 65 mg/kg ANIT once until the tenth day. After the last administration, serum total cholesterol (TC), triglyceride (TG) and total bile acids (TBA) were measured. The primary hepatocytes (RPH) were isolated from normal rats and cultured. The cells were divided into a blank group, an ANIT (40 μmol/L) group, an ANIT (40 μmol/L)+GPA (4.00 mmol/L) group (A4.00G group), an ANIT (40 μmol/L)+GPA (1.00 mmol/L) group (A1.00G group), and an ANIT (40 μmol/L)+GPA (0.25 mmol/L) group (A0.25G group). The mRNA transcription levels of SHP and cholesterol 7 alpha hydroxylase (CYP7A1) in RPH were detected by real-time-PCR, and the protein levels of SHP and CYP7a1 were detected by Western blotting. In the LRH-1 silence experiment, the RPH were divided into a blank group, a negative transfection group, a siRNA-LRH group (ZR group), a siRNA-LRH+GPA (4.00 mmol/L) group (ZR4.00G group), a siRNA-LRH+GPA (1.00 mmol/L) group (ZR1.00G group) and a siRNA-LRH+GPA (0.25 mmol/L) group (ZR0.25G group). The protein and mRNA levels of SHP, CYP7a1, LRH-1 were detected. In the over-expression experiment, the RPH were also divided into a blank group, a negative transfection group, a LRH-1 over-expression plasmid group (OE group), a LRH-1 over-expression plasmid+GPA (4.00 mmol/L) group (OE4.00G group), a LRH-1 over-expression plasmid+GPA (1.00 mmol/L) group (OE1.00G group), and a LRH-1 over-expression plasmid+GPA

关 键 词：栀子酸 小分子异源二聚体伴侣受体 肝受体同源物1 大鼠原代肝细胞 肝肠循环 

分 类 号：R285.5[医药卫生—中药学]