›› 2006, Vol. 18 ›› Issue (5): 348-350.doi:

• 论著 • 上一篇    下一篇

5-氮杂胞苷抑制乳腺癌细胞Bcap-37增殖及逆转RASSF1A基因甲基化作用

吴丽明;杨建平;莫先启;袁建辉;庄志雄   

  1. 深圳市疾病预防控制中心毒理科, 广东 深圳 518020
  • 收稿日期:2006-01-04 修回日期:2006-03-06 出版日期:2006-09-30 发布日期:2006-09-30
  • 通讯作者: 吴丽明

Effects of 5-Azacytidine on Growth Inhibition of Breast Cancer Cell Line Bcap-37 and Reversion of RASSF1A Gene Hypermethylation

WU Li-ming, YANG Jian-ping ,MO Xian-qi,YUAN Jian-hui,ZHUANG Zhi-xiong   

  1. Department of Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen 518020, Guangdong,China
  • Received:2006-01-04 Revised:2006-03-06 Online:2006-09-30 Published:2006-09-30
  • Contact: WU Li-ming

摘要: 背景与目的:探讨5-氮杂胞苷对人乳腺癌细胞Bcap-37细胞增殖的抑制作用及作用机制。材料与方法 :不同浓度的5-氮杂胞苷与Bcap-37细胞共培养后,应用细胞计数法检测Bcap-37细胞生长的情况;应用甲基化特异性PCR法(Methylation Special PCR, MSP)检测5-氮杂胞苷作用前后RASSF1A 基因甲基化、非甲基化状态的改变;采用逆转录PCR检测RASSF1A基因的mRNA表达。结果:当5-氮杂胞苷大于5.00μmol/L剂量时对细胞生长呈浓度依赖抑制作用(P<0。01); 5-氮杂胞苷作用4d后对Bcap-37细胞RASSF1A基因有去甲基化作用;细胞Bcap-37 mRNA表达明显增强。结论:特异性甲基转移酶抑制剂5-氮杂胞苷能较好地逆转Bcap-37细胞RASSF1A基因异常甲基化,诱导RASSF1A基因的表达,从而抑制肿瘤细胞生长。

关键词: 乳腺癌细胞, RASSF1A 基因, 基因甲基化, 5-氮杂胞苷, 甲基化特异性PCR

Abstract: BACKGROUND & AIM: Inhibitory effects of 5-azacytidine on the proliferation of human breast cancer cell line Bcap-37 and its mechanism were investigated. MATERIAL AND METHODS: After treatment of Bcap-37 cells with 5-azacytidine, cell proliferation was analyzed by cell counting . The methylation and unmethylation status of RASSF1A gene were detected by methylation special PCR(MSP)and RASSF1A mRNA expression was detected by RT-PCR. RESULTS: After treatment with 5-azacytidine(>5 μmol/L),the Bcap-37 cells growth rate was decreased in a dose-dependent manner. Demethylation of RASSF1A gene occurred and RASSF1A mRNA expression was increased. CONCLUSION: 5-Azacytidine could effectively enhance RASSF1A gene demethylation and enhance the expression of RASSF1A mRNA and inhibit cell growth.

Key words: breast cancer cell, RAS association domain family1A Gene, gene methylation, 5-Azacytidine, methylation special PCR