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丁酸钠诱导HeLa细胞凋亡过程中端粒酶活性及端粒长度的变化 被引量:2

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摘要 研究了丁酸钠诱导的HeLa细胞凋亡过程中端粒酶活性和端粒长度的变化. 丁酸钠处理 48 h后, HeLa细胞表现出明显的凋亡特征: 染色质凝集, 形成凋亡小体, DNA在核小体间断裂并降解产生梯状电泳图谱. 凋亡细胞中端粒酶活性无显著改变, 端粒长度却急剧缩短; 抑制端粒酶活性后, 细胞对凋亡刺激的易感性增强, 端粒的降解加快. 以上结果表明, 丁酸钠诱导的细胞凋亡与端粒长度密切相关, 但不影响端粒酶的活性. 端粒酶则可以通过保护端粒来增加细胞对凋亡刺激的耐受性.
出处 《科学通报》 EI CAS CSCD 北大核心 2000年第17期1861-1867,共7页 Chinese Science Bulletin
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