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降低谷胱甘肽的水平增强硒的凋亡效应:体外研究涉及p38和JNK MAPKs 被引量:1

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摘要 为了评价在缺乏谷胱甘肽情况下硒(Se)对凋亡的影响。用睾丸细胞作为评价细胞模型。研究时,细胞被保持在各种不同处理条件下4 h,即Se(0.5μmol和1.5μmol)、BSO(20 nmol)、Se+BSO联合处理(0.5μmol Se+20 nmolBSO和1.5μmol Se+20 nmol BSO,收集被处理过的细胞,评价指标为:细胞生存能力、还原型谷胱甘肽(GSH)、氧化型谷胱甘肽(GSSG)、氧化还原率、活性氧的产生和DNA的完整性。提取JNK、p38、caspase 3和Bcl-2的mRNA进行RT-PCR分析。将对照组和处理组细胞进行比较,观察到在联合处理组伴随着GSH水平降低细胞的生存能力减弱,GSSG水平升高,活性氧(ROS)产生增加。伴随着caspase 3表达增加和Bcl-2表达减少,JNK和p38MAPK的mRNA表达增加。联合处理组细胞的DNA完整性改变。因此,本结果和早期报道观点是一致的,即细胞内活性氧(ROS)的增加可以调节由亚硒酸钠导致的细胞凋亡和硒的细胞毒性。Se处理细胞内GSH的减少也伴随凋亡增加、p38和JNK MAPK表达增加,Bcl-2表达减少,caspase-3表达增加。数据显示GSH参与睾丸细胞凋亡,GSH分子的减少在决定细胞凋亡方面起着关键的作用。
作者 德央 康龙丽
出处 《国外医学(医学地理分册)》 CAS 2013年第1期33-37,共5页 Foreign Medical Sciences:Section of Medgeography
基金 西藏自治区重点学科 西藏自治区科技厅重点资助项目(No.201222)
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