在后代小鼠中,聚乙烯纳米塑料的代际神经毒性是由功能障碍的微生物-肠-大脑轴介导的
Xing Li1, Erkai He2, Guangquan Chen3
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Environment international
|September 25, 2024
概括
母亲接触纳米塑料 (NP) 通过破坏肠道微生物群,损害后代的神经发育,导致神经炎症和神经递质水平的改变. 这项研究揭示了通过微生物-肠-大脑轴的NP暴露的代际风险.
科学领域:
- 环境科学 环境科学
- 神经科学是一个神经科学.
- 毒理学 毒理学 毒理学
背景情况:
- 纳米塑料 (NP) 是普遍存在的环境污染物.
- 对NP暴露的代际影响尚不清楚.
- 微生物-肠-大脑轴在神经发育和功能中起着至关重要的作用.
研究的目的:
- 调查母亲暴露于聚烯纳米塑料 (PSNPs) 的代际神经毒性影响.
- 阐明微生物-肠-大脑轴在介导后代小鼠这些效应中的作用.
主要方法:
- 在怀孕和哺乳期间,母亲暴露于100nmPSNP.
- 评估大脑炎症标志物 (TNF-α,微质) 和组织学.
- 神经递质代谢和16SrRNA测序用于肠道微生物组分析.
- 对肠道屏障完整性和血脂多糖水平的分析.
主要成果:
- 母亲的PSNP暴露增加了后代的大脑TNF-α和微质细胞,导致神经元损伤.
- 在后代中观察到多巴胺和血清代谢的显著变化.
- 暴露于PSNP诱导了肠道功能障碍,肠道屏障功能障碍和升高的血液LPS.
- 确定了肠道细菌,神经递质代谢物和神经炎症之间的关联.
结论:
- 母亲暴露于纳米塑料会诱导后代产生代际神经毒性.
- 微生物-肠-大脑轴是调解这些不良影响的关键途径.
- 这项研究强调了纳米塑料对神经发育和大脑功能的潜在风险.
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