The contents of sweroside and isoorientin in Gentiana straminea Maxim.flower from ten locations of Qinghai Province were determined by HPLC.The results show that the content of isoorientin is higher than that of swero...The contents of sweroside and isoorientin in Gentiana straminea Maxim.flower from ten locations of Qinghai Province were determined by HPLC.The results show that the content of isoorientin is higher than that of sweroside in G.straminea flower,and isoorientin and sweroside contents have certain differences among ten samples from ten locations.The content range of isoorientin and sweroside in ten samples is 0.563%-0.937% and 0.346%-0.453%,respectively.And isoorientin content in the sample from Xiangpishan and sweroside content in the sample from Xihaizhen are the highest.It is suggested that sweroside and isoorientin contents in G.straminea flower are affected by ecological environment of locations,and isoorientin content is affected more obviously.展开更多
目的研究满天星异荭草苷对人肝癌HepG2细胞增殖和凋亡的影响及其作用机制。方法满天星异荭草苷5,10,20,40,80和160μmol·L^(-1)作用于HepG2细胞24,48和72h后,用MTT法检测细胞存活率。满天星异荭草苷5,10和20μmol·L^(-1)作用...目的研究满天星异荭草苷对人肝癌HepG2细胞增殖和凋亡的影响及其作用机制。方法满天星异荭草苷5,10,20,40,80和160μmol·L^(-1)作用于HepG2细胞24,48和72h后,用MTT法检测细胞存活率。满天星异荭草苷5,10和20μmol·L^(-1)作用细胞48 h,检测细胞内乳酸脱氢酶(LDH)的释放量;作用24 h,荧光探针H2DCF-DA测定细胞内活性氧(ROS)含量,流式细胞仪检测HepG2细胞凋亡和线粒体膜电位,比色法检测胱天蛋白酶3,8和9的活性,RT-PCR检测Bcl-2和Bax m RNA的表达;Western蛋白印迹法检测Bcl-2,Bax和细胞色素c蛋白的表达。结果满天星异荭草苷浓度依赖性地(5~160μmol?L^(-1))抑制HepG2细胞存活,作用24,48和72 h时IC50分别为62.7±9.1,47.2±11.4和(18.2±7.5)μmol?L^(-1)。与细胞对照组相比,满天星异荭草苷5,10和20μmol?L^(-1)能明显提高LDH水平和细胞凋亡率(P<0.05),10和20μmol?L^(-1)可显著促进ROS的产生,降低线粒体膜电位,并增强胱天蛋白酶3和9的活性;RT-PCR和Western蛋白印迹结果表明,满天星异荭草苷能明显降低Bcl-2 m RNA和蛋白的表达,但升高Bax m RNA和蛋白表达(P<0.05),降低细胞色素c蛋白表达(P<0.05)。结论满天星异荭草苷抑制HepG2细胞增殖,促进其凋亡,该作用与线粒体凋亡途径密切相关。展开更多
文摘The contents of sweroside and isoorientin in Gentiana straminea Maxim.flower from ten locations of Qinghai Province were determined by HPLC.The results show that the content of isoorientin is higher than that of sweroside in G.straminea flower,and isoorientin and sweroside contents have certain differences among ten samples from ten locations.The content range of isoorientin and sweroside in ten samples is 0.563%-0.937% and 0.346%-0.453%,respectively.And isoorientin content in the sample from Xiangpishan and sweroside content in the sample from Xihaizhen are the highest.It is suggested that sweroside and isoorientin contents in G.straminea flower are affected by ecological environment of locations,and isoorientin content is affected more obviously.
文摘目的研究满天星异荭草苷对人肝癌HepG2细胞增殖和凋亡的影响及其作用机制。方法满天星异荭草苷5,10,20,40,80和160μmol·L^(-1)作用于HepG2细胞24,48和72h后,用MTT法检测细胞存活率。满天星异荭草苷5,10和20μmol·L^(-1)作用细胞48 h,检测细胞内乳酸脱氢酶(LDH)的释放量;作用24 h,荧光探针H2DCF-DA测定细胞内活性氧(ROS)含量,流式细胞仪检测HepG2细胞凋亡和线粒体膜电位,比色法检测胱天蛋白酶3,8和9的活性,RT-PCR检测Bcl-2和Bax m RNA的表达;Western蛋白印迹法检测Bcl-2,Bax和细胞色素c蛋白的表达。结果满天星异荭草苷浓度依赖性地(5~160μmol?L^(-1))抑制HepG2细胞存活,作用24,48和72 h时IC50分别为62.7±9.1,47.2±11.4和(18.2±7.5)μmol?L^(-1)。与细胞对照组相比,满天星异荭草苷5,10和20μmol?L^(-1)能明显提高LDH水平和细胞凋亡率(P<0.05),10和20μmol?L^(-1)可显著促进ROS的产生,降低线粒体膜电位,并增强胱天蛋白酶3和9的活性;RT-PCR和Western蛋白印迹结果表明,满天星异荭草苷能明显降低Bcl-2 m RNA和蛋白的表达,但升高Bax m RNA和蛋白表达(P<0.05),降低细胞色素c蛋白表达(P<0.05)。结论满天星异荭草苷抑制HepG2细胞增殖,促进其凋亡,该作用与线粒体凋亡途径密切相关。