益生菌衍生的细胞外囊泡通过肠肝轴减轻胆固醇性肝损伤
Xianjiao Liu1, Yanyan Wang1, Andrea Abreo Medina1
1College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China; Institute of Animal Nutritional Health, Nanjing Agricultural University, Nanjing, Jiangsu, China; MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China.
Pharmacological research
|February 26, 2026
概括
益生菌 Lactobacillus amylovorus 细胞外囊泡 (LAEVs) 通过调节肠道微生物群 - 胆酸 - ROS 轴来防止肝损伤和纤维化. LAEV恢复了肠道屏障功能,并激活了对肝脏健康至关重要的FXR/FGF-15通路.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 胆固醇性肝脏疾病作为一种常见的发病因子,共享肠肝轴干扰.
- 益生菌及其细胞外囊泡 (EVs) 显示出减轻肝损伤的潜力.
研究的目的:
- 研究Lactobacillus amylovorus (LA) 和其EVs对肝损伤和纤维化的保护机制.
- 阐明肠道微生物群和胆酸代谢在LAEV治疗效果中的作用.
主要方法:
- 使用3,5-二氧化碳-1,4-二聚胺 (DDC) 养和Mdr2淘汰的小鼠模型.
- 进行了RNA测序,便微生物种移植和向基因淘汰实验.
- 评估肝损伤,纤维化,肠道屏障功能,胆酸概况和氧化应激.
主要成果:
- 在小鼠模型中,直接的LA补充及其EV (LAEV) 改善了肝损伤和纤维化.
- LAEVs重塑了肠道微生物群,增加了胆酸脱和分泌,并修复了肠道屏障.
- LAEVs激活了肠道的FXR/FGF-15轴,减少了肝胆酸和氧化应激,这取决于肠道微生物群和FXR信号.
结论:
- 通过调节肠道微生物群-胆酸-ROS轴,LAEVs可以减轻胆固醇性肝纤维化.
- 通过恢复肠道屏障的完整性和激活FXR/FGF-15通路来调解LAEV的保护作用.
- 在胆固醇性肝病中,LAEV 是一个有前途的治疗策略.
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