细菌体甲基马洛尼尔-CoA突变酶产生 propionate,促进肠道杯细胞分化和恒常性
Xingyu Wang1, Zhongle Cai1, Qiaoling Wang1
1Department of Endocrine and Metabolic Diseases, Shanghai Institute of Endocrine and Metabolic Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai National Clinical Research Center for Metabolic Diseases, Key Laboratory for Endocrine and Metabolic Diseases of the National Health Commission of the PR China, Shanghai Key Laboratory for Endocrine Tumor, State Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
在 Bacteroides thetaiotaomicron 中的甲基尼尔-CoA 突变酶 (MCM) 产生 propionate,一种短链脂肪酸. 这一过程增强了杯状细胞的分化,缓解了肠道炎症,具有治疗潜力.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
背景情况:
- 氨酸是一种来自肠道细菌的短链脂肪酸,通过调节免疫和代谢途径,为健康提供好处.
- 在关键的肠道微生物中,例如 Bacteroides thetaiotaomicron 中,酸生物合成的特定生化途径和功能尚未完全理解.
研究的目的:
- 为了识别负责Bacteroides thetaiotaomicron中的甲基马洛尼尔-CoA突变酶 (MCM) 的基因操作子.
- 阐明MCM介导的酸生产在杯状细胞分化和肠道炎症中的作用.
主要方法:
- 在B. thetaiotaomicron中识别MCM基因操作子.
- 用野生型和MCM缺乏的B. thetaiotaomicron菌株对无菌的小鼠进行殖民.
- 在体外研究使用肠道有机物和酸补充剂.
- 评估DSS诱导的肠道炎症模型.
主要成果:
- 鉴定出MCM基因操作子对于B. thetaiotaomicron中的酸盐生物合成至关重要.
- 通过MCM介导的酸生产促进了杯状细胞的分化和与粘液相关的基因表达.
- 缺乏MCM的B. thetaiotaomicron未能缓解DSS引起的肠炎症,这种效果通过酸补充恢复.
- 在MCM介导的酸生产后,GPR41缺乏的有机体中,杯状细胞分化减少.
结论:
- 通过MCM介导的酸生物合成对于杯状细胞的分化和肠道中的粘液产生至关重要.
- 酸在减轻肠道炎症方面发挥着重要作用,可能是通过GPR41信号传递.
- 准MCM介导的酸生产为肠炎等炎症性肠病提供了潜在的治疗策略.
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