肠道微生物群在结肠中介于环氧eicosanoid的代谢
Nan Jing1, Matthew L Edin2, Yige Wang1
1Department of Nutrition, University of California, Davis, California, USA.
The Journal of biological chemistry
|June 6, 2025
概括
肠道微生物群在结肠中将脂肪酸环氧化物代谢成二醇. 这种微生物作用降低了环氧化物水平,影响了宿主健康和疾病.
科学领域:
- 生物化学 生化学
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 细胞染色体P450 (CYP) 酶会将多不和脂肪酸代谢成生物活性脂质介质,称为脂肪酸环氧化物.
- 这些环氧化物在调节炎症,免疫反应和血管度方面发挥着至关重要的作用.
- 肠道微生物群对这些脂质介质的新陈代谢的贡献在很大程度上尚未被探索.
研究的目的:
- 研究肠道微生物群在结肠中CYP衍生的脂肪酸环氧化物代谢中的作用.
- 为了确定肠道微生物是否直接影响这些内源性脂质介质的水平.
主要方法:
- 在小鼠结肠中分析CYP衍生的eicosanoids,使用液体染色学-并联质谱法 (LC-MS/MS).
- 传统养,无细菌和接受抗生素治疗的小鼠之间的比较,以评估微生物群的影响.
- 对宿主酶表达和直接微生物催化物的研究.
主要成果:
- 肠道微生物群显著降低了脂肪酸环氧化物的结肠水平.
- 微生物的新陈代谢将脂肪酸环氧化物转化为脂肪酸二醇.
- 这些变化是由直接的微生物催化作用介导的,而不是改变宿主酶表达.
结论:
- 肠道微生物群直接参与结肠脂肪酸环氧化物代谢.
- 微生物将环氧化物转化为二醇的水解调节了内源性脂质介质度.
- 微生物代谢CYPeicosanoids可能是一个关键的机制,将肠道微生物群与宿主代谢和疾病联系起来.
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