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丹参酚酸B盐对人肝星状细胞内肌细胞增强因子2的影响 被引量:9

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摘要 以分离和培养的人肝星状细胞(H-HSC)为研究对象,观察H-HSC是否表达肌细胞增强因子2(MEF2)且与转化生长因子β1(TGF-β1)之间的关系,进一步探讨丹参酚酸B盐(SA-B)抗肝纤维化的作用机制,分离H-HSC后,用TGF-β1刺激培养的H-HSC,通过免疫印迹分析及分别转染含有MEF2启动子和I型胶原启动子的luciferase报道基因质粒入H-HSC,检测荧光素酶活性,观察经SA-B干预后MEF2,α-平滑肌肌动蛋白(α-SMA)及I型胶原表达的变化.结果显示H-HSC能够表达MEF2,且随H-HSC的活化而增加;经TGF-β1刺激的H-HSC内α-SMA的表达、I型胶原启动子的活性和I型胶原蛋白的生成均明显增强,同时MEF2启动子的活性和MEF2A和MEF2C的蛋白表达也明显增强;SA-B对以上这些物质的表达均有明显的抑制作用.上述结果说明MEF2参与了肝纤维化的形成,SA-B抑制H-HSC活化的作用与其抑制TGF-B1在H-HSC内的信号传导与抑制转录因子MEF2A和MEF2C的表达有关.
出处 《自然科学进展》 北大核心 2008年第5期573-578,共6页
基金 国家自然科学基金(批准号:30271657) 上海市教委重点学科建设项目(批准号:04CA02) 上海市重点学科建设项目(批准号:Y0302)资助
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