人端粒酶RNA反义寡核苷酸对顺铂诱导K562细胞凋亡的影响

被引:9
作者
肖扬
张洹
机构
[1] 暨南大学医学院血液病研究所,暨南大学医学院血液病研究所广东广州,广东广州
关键词
RNA; 端粒,末端转移酶; 寡核苷酸类,反义; K562细胞; 顺铂; 脱噬作用;
D O I
暂无
中图分类号
R73-34 [化学实验];
学科分类号
100112 [医学生物化学与分子生物学];
摘要
目的研究人端粒酶RNA(hTR)反义寡核苷酸(ASODN)可否增强K562细胞对顺铂的敏感性。方法采用与hTR模板区互补的硫代ASODN处理K562细胞,用端粒酶重复扩增分析-PCR-ELISA检测法观察端粒酶活性的变化;琼脂糖凝胶电泳分析细胞凋亡的DNA断裂;Annexin V+PI双染后流式细胞仪检测凋亡细胞百分率。结果经ASODN作用后,K562细胞端粒酶活性明显下降。ASODN作用K562细胞24 h,再加入顺铂作用72 h,琼脂糖凝胶电泳可见DNA梯形条带,而正义寡核苷酸(SODN)与顺铂联合作用组及单用顺铂组均未见到明显的DNA梯形条带。ASODN作用K562细胞24 h,再加入5 μmol/L 顺铂作用48、72 h的凋亡细胞百分率(18.3%和31.6%)分别与SODN联合顺铂作用组(9.6%和10.5%)、单用顺铂组(7.1%和9.4%)比较,差异有显著性(P<0.01)。结论以hTR模板区为靶点,ASODN能抑制端粒酶活性并促进顺铂诱导K562细胞的凋亡。
引用
收藏
页码:144 / 147
页数:4
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