苟练¹,
廉楠¹,
王巧旭²,
彭双清³,
徐培渝
1. 四川大学华西公共卫生学院营养食品卫生与毒理学系, 成都 610041;
2. 上海市食品药品检验所药理毒理室, 上海 201203;
3. 军事医学科学院疾病预防控制所毒理学评价研究中心, 北京 100071

作者简介: 苟练(1991-),女,硕士研究生,研究方向为卫生毒理学,E-mail:727510538@qq.com.

基金项目: 国家“十一五”科技支撑计划(No. 2006BAK02A00)


中图分类号: X171.5

Effects of Organophosphorus and Carbamate Pesticides on DNA Damage in PC₁₂ Cells Alone and in Combination

Gou Lian¹,
Lian Nan¹,
Wang Qiaoxu²,
Peng Shuangqing³,
Xu Peiyu
1. Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu 610041, China;
2. Department of Pharmacology and Toxicology, Shanghai Institute for Drug and Food Control, Shanghai 201203, China;
3. Institute of Toxicology, Institutes of Disease Control and Prevention, Military Medical Science Academy of the PLA, Beijing 100071, China

CLC number: X171.5

-->

摘要
HTML全文
图(0)表(0)
参考文献(0)
相关文章
施引文献
资源附件(0)
访问统计

摘要:研究有机磷类农药毒死蜱和对硫磷、氨基甲酸酯类农药克百威和残杀威单独及联合染毒大鼠嗜铬细胞瘤株(PC₁₂细胞)所致的DNA损伤情况及联合作用模式。分别以0 μmol·L^-1、50 μmol·L^-1、100 μmol·L^-1、200 μmol·L^-1、400 μmol·L^-1的有机磷农药毒死蜱、对硫磷与 0 μmol·L^-1、25 μmol·L^-1、50 μmol·L^-1、100 μmol·L^-1、200 μmol·L^-1 的氨基甲酸酯类农药克百威、残杀威单独及两两联合染毒PC₁₂细胞12 h后进行彗星实验，采用彗尾长度、尾部DNA百分含量、尾矩3个指标来衡量DNA损伤程度。结果表明：毒死蜱、克百威、对硫磷、残杀威染毒PC₁₂细胞12 h后，细胞出现拖尾，呈现典型的彗星图像。染毒后PC₁₂细胞彗尾长度、尾部DNA百分含量、尾矩较对照组显著增加，差异有统计学意义(P<0.01)。析因分析表明，无论低剂量联合还是高剂量联合，毒死蜱与克百威、对硫磷与残杀威均有交互作用(P<0.01)，作用模式为协同作用。以上结果提示，有机磷及氨基甲酸酯类农药单独及联合作用均可引起PC₁₂细胞DNA损伤，联合作用后损伤程度要高于单独作用，且低剂量和高剂量联合时均存在交互作用，作用模式为协同作用。
关键词: 毒死蜱/
对硫磷/
克百威/
残杀威/
遗传毒性/
联合作用

Abstract:The paper aims to evaluate in vitro DNA damage of PC₁₂ cells induced by pesticides chlorpyrifos, parathion, carbofuran and propoxur alone or jointly after 12-hour exposure. The concentrations of pesticides chlorpyrifos and parathion applied were 0, 50, 100, 200 and 400 μmol·L^-1, respectively. The concentrations of pesticides carbofuran and propoxur applied were 0, 25, 50, 100 and 200 μmol·L^-1, respectively. PC₁₂ cells were first exposed to these pesticides alone or jointly for 12 h. The Comet assay was then used to evaluate the degree of DNA damage via measuring the length of comet tails, DNA contents in comet tails and tail moments. The PC₁₂ cells showed typical images with tailing after being exposed for 12-hour to chlorpyrifos, carbofuran, parathion and propoxur. The tail length, tail DNA percentage and tail moments increased significantly comparing to the controls, and the difference is significant in statistics (P < 0.01); factor analysis showed that chlorpyrifos and carbofuran, parathion and propoxur interacted (P <0.01) in both low dose and high dose of combinations, and the synergistic effect was observed. Therefore, the DNA damage of PC₁₂ cell can be induced by both organophosphorus and carbamate pesticides. The extents of DNA damage induced by a joint exposure of two pesticides were more significant than that induced by an exposure of a single pesticide. Joint exposure of two pesticides demonstrates a synergistic effect.
Key words:chlorpyrifos/
parathion/
carbofuran/
propoxur/
genotoxicity/
synergistic effect.