癌变·畸变·突变 ›› 1998, Vol. 10 ›› Issue (4): 203-206.doi: 10.3969/j.issn.1004-616x.1998.04.003

• 论著 • 上一篇    下一篇

HeLa - MLH1 - 细胞的生物学特性检测

张 芸XX  钱 瑛 余应年 汪爱今 罗建红   

  1. 浙江医科大学病理生理学教研室 浙江省医学分子生物学实验室 杭州 310031
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-07-30 发布日期:1998-07-30

THE DETECTION OF BIOLOGICAL CHARACTERISTICS OF HELA2MLH1 - CELL

Zhang Yun , Qian Ying , Yu Yingnian , Wang Aijin , Luo J ianhong   

  1. Department of Pathophysiology Zhejiang Medical University and Provincial key L aboratory of Medical Molecular Biology , Hangz hou 310031
  • Received:1900-01-01 Revised:1900-01-01 Online:1998-07-30 Published:1998-07-30

摘要: 对本实验室构建的错配修复功能缺陷细胞HeLa - MLH1 - 的次黄嘌呤鸟嘌呤磷酸核糖基转移酶(hprt) 基因自发突变率进行检测,发现相对于无hMLH1 缺陷的对照细胞HeLa - R9 和HeLa 而言,其突变率分别提高了8178 倍和3153 倍( P < 0101) ,此表型改变与本实验室已构建的另一错配修复功能缺陷细胞HeLa- MSH2 - 相同。本实验室还证明HeLa - MLH1 - 细胞存在甲基硝基亚硝基胍(methyl-nitro-nitrosoguanidine ,MNNG) 耐受,这与我们在HeLa - MSH2 - 细胞实验中的发现不同,提示不同的错配修复基因功能缺陷对细胞表型影响不尽相同。

关键词: 脱氧核糖核酸修复, 次黄嘌呤鸟嘌呤磷酸核糖基转移酶, 突变, N-甲基-N’-硝基-N-亚硝基胍

Abstract: Spontaneous mutation rate at hypoxanthine phosphoribosylt ransferase (hprt) locus increased markedly in Hela2MLH1 - cell , mismatch repair (MMR) deficient cell line , it exhibited a 8. 78 and 3. 532fold increase in mutation f requency relative to MMR2proficient HeLa2R9 and HeLa cell line. This phenotype is similar to another mismatch repair defective cell line HeLa2MSH2 - .MNN G tolerance also appeared in HeLa2MLH1 - cell but no MNN G tolerance in HeLa2MSH2 -cell. These data suggest that different MMR gene defect exert s different effect s on mutator phenotypes.

Key words: DNA2repair, hypoxanthine phosphoribosylt ransferase, mutation, methyl-nitro-ni-t rosoguanidine