肠上皮质Tet2缺陷通过胆酸代谢变化对肠道微生物群进行重新编程
Nan Wang1, Qing Liu1, Fengjiao Huo1
1Institute for Regenerative Medicine, State Key Laboratory of Cardiology and Medical Innovation Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China.
mBio
|January 26, 2026
概括
肠道细胞中的DNA脱甲基酶Tet2在表观遗传上控制胆酸代谢,以年龄相关的方式改变肠道微生物群的组成. 这一Tet2-胆酸-微生物群轴影响肠道平衡,并提供治疗点.
科学领域:
- 微生物学 微生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 胃肠病学 胃肠病学
背景情况:
- 主体微生物群相互作用对于肠道平衡至关重要.
- 对于这些相互作用的表观遗传调节的理解很少.
- 在肠道上皮质中脱甲基化DNA的作用在很大程度上是未被探索的.
研究的目的:
- 为了研究DNA脱甲基酶Tet2在肠道上皮细胞中的作用.
- 阐明 Tet2 影响肠道平衡和微生物组成的机制.
- 探索Tet2-介导途径对肠道微生物群的年龄相关影响.
主要方法:
- 在小鼠中,肠上皮的特异性Tet2删除.
- 分析肠道结构,屏障功能和微生物组成.
- 胆酸概况的测量和胆酸载体的表达.
- 微生物转移的年龄依赖分析.
主要成果:
- Tet2 缺失导致肠道异常和改变的微生物群.
- 2缺乏减少胆酸载体ASBT/Slc10a2的表达,导致胆酸 (HCA) 的积累.
- 在年轻小鼠中,HCA积累促进了乳杆菌的扩张,在老年小鼠中促进了Akkermansia的扩张.
- 确定了一个以Tet2为中心的年龄相关的表观遗传-代谢-微生物轴.
结论:
- Tet2是通过胆酸代谢通过肠道微生物生态的关键表观遗传调节剂.
- 2-ASBT-HCA通路影响肠道平衡和微生物组成.
- 这些发现提供了对年龄依赖的宿主微生物相互作用和潜在的治疗策略的洞察力.
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