暴露于挥发性有机化合物会引起心血管毒性,这可能涉及DNA甲基化
Zhuoyan Li1, Jieru Lu2, Xuehua Ruan1
1Department of Pediatric Cardiology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Toxicology
|December 9, 2023
概括
母亲暴露于挥发性有机化合物 (VOC) 可能会损害胚胎心血管发育. 这项对斑马鱼胚胎的研究揭示了VOC诱导心脏异常,可能是通过影响关键基因的DNA甲基化变化.
科学领域:
- 环境毒理学环境毒理学
- 发育生物学是发展生物学.
- 心血管研究的心血管研究.
背景情况:
- 挥发性有机化合物 (VOC) 是普遍存在的环境污染物.
- 以前的研究将母体的VOC暴露与后代的先天性心脏病 (CHD) 联系起来.
- 挥发性有机化合物的对胚胎心血管发育和机制的具体影响在很大程度上是未知的.
研究的目的:
- 研究六种VOC混合物对斑马鱼胚胎心血管发育的影响.
- 阐明潜在的分子机制,包括DNA甲基化和基因表达.
- 评估发现与人类怀孕与胎儿心脏病相关性的相关性.
主要方法:
- 斑马鱼胚胎在96小时内暴露在不同度的VOC混合物中.
- 评估了心血管发育的异常 (心脏形状,血液循环,心率).
- 分析了全球DNA甲基化,差异甲基化位点和基因表达 (hgfa, ntrk1).
主要成果:
- 暴露于VOC会导致斑马鱼胚胎的剂量和时间依赖的心血管异常.
- 观察到全球DNA甲基化增加和心血管发育基因上差异甲基化位点的丰富.
- 在人类怀孕中检测到改变的hgfa和ntrk1基因表达和相应的蛋白质水平.
结论:
- 暴露于VOC会在斑马鱼胚胎中诱导显著的心血管异常.
- 毒性可能是由DNA甲基化和MAPK信号通路的表观遗传变化介导的.
- 这些发现突显了VOCs对胚胎心血管发育的风险,并表明了人类怀孕的潜在生物标志物.
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