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三甲基化物对人类神经元分化和小鼠大脑发育的影响
Ester López-Gallardo1,2,3, Patricia Meade1,2,3,4, Irene Jiménez-Salvador1,2
1Departamento de Bioquímica, Biología Molecular y Celular, Universidad de Zaragoza, Zaragoza, Spain.
Environmental toxicology
|January 28, 2026
概括
围产期暴露于环境污染物三酸,会损害神经元发育,并改变小鼠的DNA甲基化. 这种早期暴露可能会导致长期的神经发育后果和潜在的神经退行性疾病在以后的生活.
科学领域:
- 环境毒理学环境毒理学
- 神经科学是一个神经科学.
- 发育生物学是发展生物学.
背景情况:
- 健康和疾病的发育起源假设表明,围产期接触有毒物质可以导致永久的细胞变化,增加神经退行性疾病的风险.
- 三乙烯化物 (TBTC) 是一种已知的破坏氧化酸化并对神经系统产生负面影响的环境污染物.
研究的目的:
- 为了研究围产阶段的微丁化物暴露对神经元分化 in vitro 和大脑发育 in vivo 的影响.
- 评估TBTC对神经发育背后的细胞和分子机制的影响.
主要方法:
- 研究了暴露于TBTC (≤100 nM) 的人类神经母细胞和神经干细胞的神经分化.
- 在孕期和哺乳期暴露于TBTC (0-1000nM) 的怀孕小鼠.
- 在细胞和两岁小鼠身上进行了基因分子,生物化学,细胞,组织学和功能测试.
主要成果:
- 暴露于TBTC降低了氧化酸化活性,从而影响了体外神经元的分化.
- 在小鼠中,围产期TBTC暴露导致了全球DNA甲基化水平的改变.
- 在小鼠中观察到脑组织学变化和潜在的长期神经发育变化.
结论:
- 早期暴露于化三乙烯可以破坏神经元发育中的关键细胞过程.
- 在发育过程中暴露于TBTC可能会诱导持久的表观遗传修饰和组织学大脑变化.
- 由于早期的TBTC暴露,大脑发育的改变可能会产生长期的健康后果,可能会导致神经退行.
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