1 2 2 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 1 2 2 1 2 1 2 1 2 2 1 2 2 1 1 2 1 2 2 2 2 1 2 2 1 2 2 1 2 2 2 2 2 1 2 2 2 2 2 张玲等淫羊藿甙抑制肿瘤细胞端粒酶活性及其调节机制的研究第 3 期 2 · 191 · 2 淫羊藿甙抑制肿瘤细胞端粒酶活性及其调节机制的研究① 张玲王芸毛海婷温培娥崔树龄李晓冰(山东省医学科学院基础医学研究所,济南 250062) 中国图书分类号 R730 5 文献标识码 A 文章编号 1000 484X(2002) 03 0191 05 摘要目的:探讨中药单体淫羊藿甙( ICA) 抑制肿瘤 HL 60 细胞端粒酶活性及作用机制。方法:采用 MTT 法,NBT 染色 法,TRAP PCR ,RT PCR 法和流式细胞术。结果:ICA 显著抑制 HL 60 细胞端粒酶活性,且端粒酶活性下降与细胞表面粒细胞分 化抗原 CD11b 表达率呈负相关;诱导 HL 60 细胞向粒细胞方向分化;改变 HL 60 细胞周期各时相的分布,表现为 G0/ G1 期细胞 逐渐增多,S 期细胞逐渐减少;上调分化相关基因 p21、下调增殖相关基因 c myc mRNA 和蛋白表达水平。结论:阐明了 ICA 显 著抑制 HL 60 细胞端粒酶活性,并从基因蛋白细胞效应水平揭示了其调节端粒酶活性的可能机制。 关键词淫羊藿甙端粒酶活性细胞分化细胞周期基因表达 Study on the inhibition of telomerase activity and regulated mechanism in human cancer cell by Icarrin ZHANG Ling , WANG Yun , MAO Hai Ting et al Institute of Bacic Medicine , Shandong Academy of Medical Sciences , Ji nan 250062 Abstract Objective : To study inhibited erase activity of HL 60 cells in human cancer cell by Icarrin ( ICA) and its mechanism Methods :MTT assay ,NBT assay , TRAP PCR ,RT PCR assay ,Flow Cytometry Results :ICA inhibited telomerase activity in HL 60 cells significantly It was negative correlation between telomerase activity and the expression ratio of CD11b antigen in HL60 cells It can in duced HL 60 cells to differentiate into mature granulocytes It can changed