在小鼠的肠肝胆酸池的量化形式和功能
Koichi Sudo1, Amber Delmas-Eliason2, Shannon Soucy3
1Center for Digestive Health, Dartmouth Health, Lebanon, New Hampshire.
Cellular and molecular gastroenterology and hepatology
|August 23, 2024
概括
体胆汁酸 (BA) 池主要是由体胆汁酸输送体 (Asbt) 塑造的,它放大了BA水平并推动了多样性. 在BA新陈代谢中出现的障碍显著影响宿主肠道生理.
科学领域:
- 胃肠病学 胃肠病学
- 代谢学 代谢学 代谢学
- 生理学 生理学 生理学
背景情况:
- 胆汁酸 (BAs) 是关键的胃肠代谢物,参与脂质吸收和细胞信号传递.
- 膜在BA吸收中起着速度限制作用,影响宿主微生物相互作用和BA池组成.
- 了解叶BA吸收动态是解读肠肝循环和BA介导信号的关键.
研究的目的:
- 在体内量化叶BA吸收的速率和路径.
- 阐明小鼠肠肝BA池的生理形式和功能.
- 确定亚酸中介运输与被动透性对亚酸池的贡献.
主要方法:
- 使用ex vivo质谱法量化88种BA物种和代谢物.
- 对来自野生类型和ABST缺乏的小鼠的肠膜和上半肠静脉样本进行了分析.
- 叶扩展剂被用来评估对改变BA池的转录反应.
主要成果:
- 野生类型小鼠的空腹乳腺BA池被确定为大约0.3μmol/g.
- 亚酸中介运输占亚酸池的80%左右,扩大了其规模.
- 缺乏asbt的小鼠表现出~5倍小的体BA池,富含结肠BA物种,以及独特的转录变化.
结论:
- 这项研究量化了小鼠肠肝BA池的关键特征.
- 体BA吸收在很大程度上影响了BA池的组成和功能.
- 异常的BA代谢直接影响宿主肠道生理.
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