癌变·畸变·突变 ›› 2004, Vol. 16 ›› Issue (6): 365-367.doi: 10.3969/j.issn.1004-616x.2004.06.015

• 专题研究 • 上一篇    下一篇

硝酸羟胺诱导小鼠淋巴瘤细胞tk基因突变的研究

贾庆军,刘胜学,刘晋,杨录军,周燕虹,曹 佳   

  1. 第三军医大学军事预防医学院卫生毒理教研室,重庆 400038
  • 收稿日期:2004-06-15 修回日期:2004-08-10 出版日期:2004-11-30 发布日期:2004-11-30
  • 通讯作者: 曹 佳

Studies of tk Gene Mutation by Hydroxylammonium Nitrate

JIA Qing-jun, LIU Sheng-xue, LIU Jin-yi, et al   

  1. Department of Hygienic Toxicology,Preventive Medicine College,Third Millitary Medical University,Chongqing 400038,China
  • Received:2004-06-15 Revised:2004-08-10 Online:2004-11-30 Published:2004-11-30
  • Contact: CAO Jia

摘要: 背景与目的: 研究硝酸羟胺对小鼠淋巴瘤L5178Y-3.7.2c tk+/-细胞tk基因突变的影响。材料与方法: 使用硝酸羟胺对L5178Y细胞进行梯度染毒,再分别进行细胞毒性,细胞接种效率,相对存活率,相对悬浮生长率和突变频率测定。结果: 随着硝酸羟胺的剂量增加,L5178Y细胞的相对存活率和悬浮生长率均下降。在硝酸羟胺50~500 μg/ml范围内可以诱导细胞tk基因的突变率达到自发突变率几倍至十几倍。结论: 硝酸羟胺对L5178Y细胞具有明显的细胞毒性,并可以诱导tk基因突变。

关键词: 硝酸羟胺, tk位点, 致突变作用, L5178Y细胞

Abstract: BACKGROUND & AIM: To investigate the effects of Hydroxylammonium Nitrate (HAN) on the tk gene of mouse lymphoma cells. MATERIAL AND METHODS: L5178Y cells were treated with Hydroxylammonium Nitrate with different concentrations, to determine cytotxicity and mutation at different time phases. The numbers of positive wells were counted . The cell plating efficiency, relative suspension growth and mutation frequency were determined. RESULTS: The results showed that HAN (50~500 μg/ml) induced tk gene mutation with mutation frequency 1~19 times higher than that of spontaneous mutation frequency of L5178Y cells and severe cytotoxic responses. CONCLUSION: Hydroxylammonium Nitrate can exert cytotocicity and mutagenic effects on tk geng in L5178Y cells.

Key words: hydroxylammonium nitrate(HAN), tk gene, mutagenesis, L5178Y cell