来自菌核素感染的肠上皮细胞的外体-miR-129-2-3p通过调节 TIMELESS介导的细胞衰老途径促进实验性结肠炎
Shuchun Wei1,2, Xiaohan Wu1,3, Meilin Chen1,3
1Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China.
Gut microbes
|August 8, 2023
概括
核菌核酸菌感染通过外生体使性结肠炎 (UC) 恶化. 来自受感染细胞的外体miR-129-2-3p驱动DNA损伤和炎症,促进UC的进展.
科学领域:
- 胃肠病学 胃肠病学
- 微生物学 微生物学
- 分子生物学分子生物学
背景情况:
- 性结肠炎 (UC) 是由Fusobacterium nucleatum (Fn) 感染加剧的.
- 在UC进展中,Fn感染肠上皮细胞 (IEC) 衍生的外体 (Fn-Exo) 的作用尚不清楚.
研究的目的:
- 研究Fn-Exo在UC发展中的作用和机制.
- 在Fn-Exo中识别差异表达的miRNA.
- 确定Fn感染性UC的潜在诊断生物标志物.
主要方法:
- 微RNA测序以识别Fn-Exo和控制外体 (Con-Exo) 中差异表达的miRNA.
- 在体外和体内实验,以确定Fn-Exo在UC中的生物学作用和机制.
- 对miR-129-2-3p/TIMELESS轴和ATM/ATR/p53路径的分析.
主要成果:
- 外基因组将miR-129-2-3p从Fn感染的IEC传递给非感染的IEC,恶化了上皮屏障功能障碍和实验性结肠炎.
- 通过miR-129-2-3p/TIMELESS轴,Fn-Exo诱导DNA损伤,从而激活ATM/ATR/p53通路.
- 这一途径促进细胞衰老和结肠炎症.
结论:
- 外体 miR-129-2-3p/TIMELESS/ATM/ATR/p53 途径加剧了Fn感染性UC的细胞衰老,屏障损伤和实验性结肠炎.
- 这项研究揭示了Fn-传染性UC进展中的新型调节途径.
- 外体-miR-129-2-3p和TIMELESS显示出作为UC和Fn-high-UC的诊断生物标志物的潜力.
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