癌变·畸变·突变 ›› 1998, Vol. 10 ›› Issue (1): 15-018.doi: 10.3969/j.issn.1004-616x.1998.01.006

• 论著 • 上一篇    下一篇

亚硒酸钠和维甲酸对MNNG 诱导人全血白细胞非程序DNA合成的影响

曹 洁1  李瑞珍2  史永亮2  吴端宗2  龚书明2   

  1. 1 第二军医大学卫生毒理学教研室 上海 200433  2 第四军医大学军队卫生学教研室 西安 710032
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-01-30 发布日期:1998-01-30

EFFECTS OF SODIUM SELENITE AND RETINOIC ACID ON MNNG - INDUCED UNSCHEDULED DNA SYNTHESIS OF HUMAN WHOLEBLOOD CELLS

Cao J ie1 ,Li Ruizhen2 ,Shi Yongliang2 ,Wu Duanzong2 ,Gong Shuming2   

  1. 1Department of heal th toxicology , the Second Military Medical University , S hanghai 200433
  • Received:1900-01-01 Revised:1900-01-01 Online:1998-01-30 Published:1998-01-30

摘要: 本文应用非程序DNA 合成(UDS) 试验,观察了亚硒酸钠(Na2SeO3) 和维甲酸(RA) 单独和联合作用对致癌物MNNG诱发的人全血白细胞DNA 损伤的影响。结果表明,Na2SeO3 和RA 均具有抗诱变作用;当Na2SeO3 (0. 1μg/ ml) 和RA(0. 1μg/ ml) 联合作用时,也可明显降低MNNG诱发的UDS 值,其联合抑制作用大于Na2SeO3 的单独作用。实验结果还显示,Na2SeO3 作为抗癌剂,它在高剂量时又呈现遗传毒性。

关键词: 亚硒酸钠, 维甲酸, 抗诱变作用, 化学预防

Abstract: The effect s of sodium selenite (Na2SeO3) retinoic acid (RA) and Na2SeO3 + RA were examined on MNN G - induced DNA damaged with human wholeblood cells by the test of unscheduled DNA synthesis (UDS) in vit ro. The result s showed that 0. 01~0. 05μg/ ml Na2SeO3and 0. 02~2. 0μg/ ml RA significantly suppressed the responses of UDS induced by MNN G.These revealed that Na2SeO3 and RA had the antimutagenic activity. The combined inhibiting effect of (0. 1μg/ ml) Na2SeO3 + (0. 1μg/ ml) RA on MNN G- induced DNA damage was st ronger than the simply effect of Na2SeO3 . The result s also revealed that Na2SeO3 ,as inhibitor of mutagenesis ,could induce genetoxic effect s by it self at higher dose levels.

Key words: sodium selenite, retinoic acid, antimutagenesis, chemoprevention