细菌卵菌通过宿主-微生物信号改善MASLD,并强调2-氧化酸盐作为潜在的效应因子
Jiyi Choi1,2, Moon Gyeong Yoon1, Se Ha Jang1,2
1Department of Gastroenterology, Ajou University School of Medicine, Suwon, South Korea.
Clinical and molecular hepatology
|October 28, 2025
概括
细菌卵菌补充剂通过调节肠肝轴来改善与代谢功能障碍相关的脂肪性肝病 (MASLD). 这项研究确定了2-氧yisocaproic 酸 (HICA) 是由B. eggerthii.产生的关键的抗肥胖代谢物.
科学领域:
- 微生物学 微生物学
- 肝病学 肝病学是一种肝病学.
- 代谢学 代谢学 代谢学
背景情况:
- 肠道微生物组失调与代谢功能障碍相关的脂肪性肝病 (MASLD) 有关.
- 在MASLD中,特定的微生物机制和宿主反应仍然不清楚.
- 在MASLD和肥胖症中,Bacteroides eggerthii被耗尽.
研究的目的:
- 在MASLD中研究Bacteroides eggerthii的治疗潜力.
- 在西方饮食诱导的小鼠模型中阐明B. eggerthii的功能机制.
- 确定有助于抗静态效应的微生物代谢物.
主要方法:
- 16S rRNA基因测序确定了候选菌株.
- 在12周的时间里,小鼠被食西方饮食 (WD),有或没有B. eggerthii (WD+B).
- 进行了多个omics分析 (代谢学,转录学) 和体外验证.
主要成果:
- B. eggerthii补充剂显著降低了肝脏肥胖症,炎症和纤维化.
- 肠道微生物群表现出丰富的胆甘氨酸酸酶活性.
- 观察到脂质和胆酸信号通路 (CD36,FXR,FGF15) 的恢复.
- 鉴定出高水平的2-基yisocaproic acid (HICA) 是一种来自B. eggerthii的代谢物.
- 在体外,HICA减少了脂肪积累在肥胖症模型.
结论:
- 细菌卵菌通过肠肝轴调节改善了MASLD.
- 胆酸代谢和肝脂质信号传递是关键受影响的途径.
- HICA是一种新型微生物组衍生代谢物,具有显著的抗稳态活性.
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