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脱氧雪腐镰刀菌烯醇对BHK-21细胞的线粒体膜电位及Bax和Bcl-2蛋白表达的影响

DOI: 10.7685/j.issn.1000-2030.2011.02.018, PP. 101-106

Keywords: 脱氧雪腐镰刀菌烯醇,仓鼠肾细胞(BHK-21),线粒体膜电位,细胞凋亡,Bax,Bcl-2

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Abstract:

为了探讨脱氧雪腐镰刀菌烯醇(deoxynivalenol,DON)对体外培养仓鼠肾细胞(BHK-21)的线粒体膜电位及Bax和Bcl-2蛋白表达的影响,采用细胞培养、流式细胞术、免疫细胞化学染色等方法,研究DON对细胞早期凋亡率、线粒体膜电位及Bax和Bcl-2蛋白表达的变化。结果显示不同浓度的DON均可诱导BHK-21细胞凋亡,各浓度组的凋亡率都显著高于对照组(P<0.05);DON可使BHK-21细胞线粒体膜电位下降,且表现出剂量和时间效应关系。免疫组织化学染色显示,DON处理细胞24h,Bax蛋白表达显著高于对照组,而Bcl-2蛋白表达均低于对照组。上述结果表明DON诱导了BHK-21细胞凋亡和线粒体膜电位下降,Bax表达增强而Bcl-2表达下降是DON诱导BHK-21细胞凋亡的分子机制之一。

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