癌变·畸变·突变 ›› 1999, Vol. 11 ›› Issue (4): 184-188.doi: 10.3969/j.issn.1004-616x.1999.04.008

• 论著 • 上一篇    下一篇

NNK诱发人支气管上皮细胞恶性转化及氧化损伤机理研究

杨陟华1  朱茂祥1  龚诒芬1  徐 勇2  孙红琰1   

  1. 1军事医学科学院放射医学研究所 北京 100850  2美国印第安那大学医学院药理毒理研究室
  • 收稿日期:1999-01-16 修回日期:1999-04-04 出版日期:1999-07-30 发布日期:1999-07-30

NNK INDUCED HUMAN BRONCHIAL EPITHELIAL CELL LINE NEOPLASTIC TRANSFORMATION AND ITS MECHANISM OF OXIDATIVE DAMAGE

Zhihua Yang1 , Maoxiang Zhu1 , Yifeng Gong1 , Yong Xu2 , Hongyan Sun1   

  1. 1 Instit ute of Radiation Medicine , Beijing  100850  2 Department of Pharmacology & Toxicology , School of Medicine , Indiana University , USA
  • Received:1999-01-16 Revised:1999-04-04 Online:1999-07-30 Published:1999-07-30

摘要: 本文研究NNK诱发人支气管上皮细胞(BEP2D) 恶性转化及其氧化损伤机理。结果表明,500μg/ ml 的NNK作用后的第5 代细胞具有抗血清生长能力,第15 代细胞具有锚着独立生长特性,第25 代细胞具有裸鼠体内成瘤性,提示NNK诱发BEP2D 细胞发生了恶性转化。NNK作用后,BEP2D 细胞产生的过氧化氢(H2O2 ) 、超氧阴离子(O÷2 ) 和羟自由基(·OH) ,以及8 - 羟基脱氧鸟嘌呤(OH8dG) 含量均显著增高,提示NNK致BEP2D 细胞恶性转化过程中涉及到氧化损伤的机理。

关键词: NNK, BEP2D 细胞, 恶性转化, DNA 加合物, 活性氧

Abstract: The HPV216 immortalized human bronchial epithelial cell line (BEP2D) was used to study NN K in2 duced cell t ransformation and it s mechanism of oxidative damage. The 5th passage BEP2D cells t reated with 500μg/ ml NN K(NN K2500 cells) could grow in meduum containing fetal calf serum. The 15th passage NN K500 cells increased significantly colony formation in soft agar. The 25th passage N K2500 cells had the ability to grow tumor in nude mice. The level of active oxygen species productions including hydrogen peroxides(H2O2) ,superoxide anions(O ÷2 ) and hydroxyl radicals (·OH) , and the contents of 2hydroxydeoxyguanosine (OH8dG) in NN K2t reated BEP2D cells , which maybe involved mechanism ofoxidative damage.

Key words: NN K, BEP2D cell line, Neoplastic t ransformation, Active oxygen species, DNA adduct