增强的粘膜线粒体功能纠正IBD中的失生症和OXPHOS代谢
bioRxiv : the preprint server for biology
|April 1, 2024
概括
AuPhos增强了肠道线粒体功能,减少了向肠道微生物群的氧气输送. 这种纠正失生症和恢复微生物代谢物的方法可以缓解小鼠的大肠炎.
科学领域:
- 胃肠病学 胃肠病学
- 微生物学 微生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 炎症性肠病 (IBD) 中的线粒体功能障碍会改变肠道氧气水平,有利于有害细菌和异菌代谢物.
- 这种失生症会对宿主代谢和免疫产生负面影响,导致IBD的发病.
研究的目的:
- 研究一种新型化合物AuPhos对肠道上皮细胞 (IEC) 中的线粒体功能的影响.
- 在IBD小鼠模型中评估AuPhos在减轻大肠炎和纠正肠道失调症方面的疗效.
- 为了确定AuPhos是否可以纠正IBD相关的失生代谢.
主要方法:
- 评估了AuPhos对ex vivo人类结肠活检和皮罗西卡姆加速IL10-/-小鼠的主要影响.
- 在各种小鼠模型中研究了对微生物组的次要影响,包括DSS结肠炎和与人类IBD便殖民的无菌小鼠.
- 分析了微生物组的组成 (16S rRNA测序),微生物代谢物 (代谢学) 和IEC氧气利用 (Hypoxyprobe-1,大肠杆菌检测).
主要成果:
- 在多个小鼠模型中,AuPhos治疗减少了蛋白质细菌和增加了Firmicutes,表明了微生物组的纠正.
- 在人类活检中,AuPhos增强了线粒体质量和功能,在小鼠IEC中增加了氧气利用率.
- AuPhos显著降低了小鼠的结肠炎得分和改变的微生物代谢物,恢复了短链脂肪酸,胆汁酸和能量代谢的途径.
结论:
- AuPhos增强了肠道上皮细胞中的线粒体功能,导致对肠道微生物群的氧气输送减少.
- 这种机制通过恢复有益的代谢物和改善宿主能量平衡来纠正IBD相关的异位生物代谢.
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