在斑马鱼中引起的特弗鲁毒性:专注于反选择性
Hongjie Wang1, Weiye Xu2, Lianshan Li3
1Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands, School of Eco-Environment, Hebei University, Baoding 071002, China; Institute of Xiong'an New Area, Hebei university, Baoding 071002, China; College of Life Science, Hebei University, Baoding 071002, China.
Pesticide biochemistry and physiology
|September 4, 2023
概括
在斑马鱼中,奇拉性农药特夫卢林表现出反选择性毒性,其中 (1R,3R) - 特夫卢林的毒性明显高于 (1S,3S) - 特夫卢林. 这种差异源于对通道的立体特异性结合,并影响基因表达,突出了对水生生态系统的风险.
科学领域:
- 环境毒理学环境毒理学
- 基拉尔杀虫剂的分析.
- 评估水生生态系统风险评估
背景情况:
- 氨酸是一种广泛使用的合性甲状腺杀虫剂.
- 夫林对生态的选择性生态风险在很大程度上是未知的.
- 了解对方体特异性毒性对于准确的环境风险评估至关重要.
研究的目的:
- 为了研究tefluthrin对斑马鱼的特异因子特异性毒性.
- 阐明特夫林反体之间的差异性毒性的潜在机制.
- 评估特夫林反体对水生生物构成的潜在风险.
主要方法:
- 对斑马鱼胚胎,幼虫和成人的急性和发育性毒性测试.
- 在斑马鱼胚胎中进行氧化应激测试.
- 用斑马鱼道蛋白 (Nav1.6) 进行分子对接模拟.
- 转录组分析以确定受影响的基因表达途径.
主要成果:
- (1R,3R) -Tefluthrin的急性毒性比 (1S,3S) -tefluthrin高130-176倍.
- (1R,3R) -Tefluthrin显著增加了斑马鱼胚胎的变形率,并减少了化和自发运动.
- 观察到对Nav1.6的立体特异性结合和差异性基因表达模式,这表明了不同的毒理机制.
- (1R,3R) -Tefluthrin在斑马鱼胚胎中诱导的氧化应激比其基相比更大.
结论:
- 在斑马鱼的急性毒性,发育效应和氧化应激诱导方面,特弗卢氨基酶表现出显著的差异.
- 与通道的立体特异性相互作用和改变的基因表达是驱动选择性毒性的关键机制.
- 这些发现强调了在对水生生态系统的杀虫剂风险评估中考虑体差异的重要性.
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