上海大学学报(自然科学版) ›› 2016, Vol. 22 ›› Issue (2): 181-187.doi: 10.3969/j.issn.1007-2861.2016.01.008

• 环境与化学工程 • 上一篇    下一篇

1-硝基芘和苯并[a] 芘对人肺上皮A549 细胞的联合细胞毒性

尚羽, 周倩, 蒋玉婷   

  1. 上海大学环境与化学工程学院环境污染与健康研究所, 上海200444
  • 收稿日期:2016-01-12 出版日期:2016-04-30 发布日期:2016-04-30
  • 通讯作者: 尚羽(1982—), 女, 副研究员, 博士, 研究方向为大气污染物的区域污染特征和健康影响. E-mail: yushang@shu.edu.cn
  • 作者简介:尚羽(1982—), 女, 副研究员, 博士, 研究方向为大气污染物的区域污染特征和健康影响. E-mail: yushang@shu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(21107068, 41561144007);上海大学长江学者和创新团队发展计划资助项目(IRT13078)

Combined effects of 1-nitropyrene and benzo(a)pyrene on cytotoxicity and DNA damage in human lung epithelial A549 cells

SHANG Yu, ZHOU Qian, JIANG Yuting   

  • Received:2016-01-12 Online:2016-04-30 Published:2016-04-30

摘要:

1-硝基芘(1-nitropyrene, 1-NP)是柴油车尾气中检测浓度最高的硝基多环芳烃. 以1-NP 为主体, 人肺上皮A549 细胞为研究对象, 探讨了1-NP 和苯并[a] 芘(benzo(a)pyrene, B[a]p)的联合细胞毒性及其对DNA 的损伤. 联合染毒实验结果表明: 当B[a]p 和1-NP 同时作用于A549 细胞时, B[a]p 能明显减弱由1-NP 造成的细胞增殖抑制和细胞内活性氧簇(reactive oxygen species, ROS)水平升高, 但对DNA 的损伤与1-NP 单独染毒组相近;利用B[a]p 预染毒A549 细胞24 h, 能明显减弱由1-NP 造成的细胞增殖抑制和ROS 水平升高, 但对DNA 的损伤加剧. 以上结果说明, 1-NP 和B[a]p 联合作用可能是通过抑制ROS 的生成来降低对细胞增殖的抑制, 但所造成的对DNA 损伤的加剧可能是通过其他的作用途径.

关键词:  ,  ,  ,  , 1-硝基芘 , DNA 损伤 , 苯并[a] 芘 , 大气颗粒物 , 活性氧簇

Abstract:

Using human lung epithelial A549 cells, combined toxic effects of 1-nitropyrene (1-NP) and benzo(a)pyrene (B[a]p) were evaluated. The 1-NP caused a significantly concentration-dependent viability decrease, DNA damage and reactive oxygen species (ROS) generation. Compared with the groups treated with 1-NP alone, viability was significantly increased and ROS generation was significantly reduced in combined-treated groups with 1-NP and B[a]p. However, the DNA damage was significantly increased in the combinedtreated groups compared with the groups treated with 1-NP alone. These results suggested that 1-NP may mediate the cytotoxic effects through ROS generation, and pretreatment, with B[a]p may inhibit ROS generation induced by 1-NP, and thereby reducing the cell death in A549 cells. However mechanisms of DNA damage deserves further investigations.

Key words:  benzo(a)pyrene (B[a]P) ,  DNA damage ,  particulate matter ,  reactive oxygen species (ROS), 1-nitropyrene (1-NP)