在生命早期长期暴露于二二乙基甲酸盐 (DEHP) 损害了与Caenorhabditis elegans中多巴胺基通路相关的致病回避行为
Ting-An Lin1, Chun-Han Chang1, Tzu-Ting Chang1
1Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 106, Taiwan.
Environmental toxicology and pharmacology
|May 28, 2025
概括
塑化剂DEHP损害了土壤线虫C. elegans的作用.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 神经生物学 神经生物学 神经生物学
背景情况:
- 二二甲基甲酸 (DEHP) 是一种常见的环境污染物.
- 土壤生态系统是Bacillus thuringiensis (Bt) 和Caenorhabditis elegans (C. elegans) 之间的相互作用的主机.
- 生物体的避开行为对生存至关重要,但C. elegans对Bt的反应还未得到充分研究.
研究的目的:
- 调查DEHP暴露是否会破坏C. elegans对Bt.的回避行为.
- 阐明DEHP诱导的行为变化的潜在分子机制.
主要方法:
- 行为测定测量C. elegans避免Bt. 的行为测定.
- 对多巴胺相关基因 (cat-2,dop-1) 的基因表达的分析.
- 分子对接模拟以评估DEHP与多巴胺受体的结合亲和力.
主要成果:
- Bt对C. elegans的生长和生存产生负面影响.
- 暴露于DEHP (5 mg/L为5天) 显著影响了C. elegans避免Bt.
- DEHP不会改变Bt和大肠杆菌OP50之间的食物偏好.
- 避免障碍与cat-2和dop-1的表达减少有关.
- 分子对接显示DEHP强烈与多巴胺D1受体结合.
结论:
- 暴露于DEHP干扰了C. elegans的基本避开行为.
- 这种干扰与多巴胺信号通路的改变有关.
- 由于破坏土壤无脊椎动物的关键生存机制,DEHP构成潜在的生态风险.
相关概念视频
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Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...