长期暴露于triclosan会通过改变肠道微生物群来诱导葡萄糖耐受性受损
Zhen Yu1, Junyong Han2, Lisha Li2
1Fujian Provincial Key Laboratory of Medical Analysis, Fujian Academy of Medical Sciences, Fuzhou, 350001, China; Department of Preventive Medicine, School of Public Health, Fujian Medical University, Fuzhou, 350122, China.
概括
在大鼠中,克洛桑 (TCS) 暴露改变了肠道微生物群,导致葡萄糖不耐受. 这通过分支链氨基酸 (BCAA) 的变化发生,影响胰岛素抵抗和宿主代谢.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 代谢科学 代谢科学
背景情况:
- 特里克洛桑 (TCS) 是一种广泛使用的抗微生物药物,存在于众多消费品中.
- 人类广泛暴露和TCS在环境中的存在引发了健康和污染问题.
研究的目的:
- 调查慢性特里克洛桑 (TCS) 暴露对大鼠葡萄糖代谢和肠道微生物群的影响.
- 阐明连接TCS暴露,肠道失调和葡萄糖耐受性受损的机制.
主要方法:
- 在20周的时间里,老鼠被暴露在TCS中.
- 用16S rRNA基因测序分析了肠道微生物组成.
- 测量了Cecal代谢量和血清BCAA水平.
- 胰岛素耐药性通过西部斑点和免疫染色来评估.
主要成果:
- 暴露于TCS改变了肠道微生物群的组成,增加了Firmicutes/Bacteroidetes的比率.
- TCS 破坏了宿主代谢途径,增加了血清分支链氨基酸 (BCAA).
- 增加的BCAA刺激了mTOR信号传递和IRS-1酸化,导致胰岛素抵抗和葡萄糖不耐受.
结论:
- 由TCS诱导的肠道微生物群失调有助于葡萄糖不耐受.
- 改变的BCAA代谢在TCS诱导的胰岛素抵抗中起着关键作用.
- 通过重塑肠道微生物群和影响BCAA水平,TCS可能会破坏葡萄糖代谢.
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