组X脂酶A2通过宿主-微生物群相互作用将结肠脂质平衡与系统代谢联系起来
Hiroyasu Sato1, Yoshitaka Taketomi1, Remi Murase2
1Laboratory of Microenvironmental and Metabolic Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan; Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan.
Cell reports
|September 19, 2024
概括
在肠道微生物群中分泌的脂酶A2组X (sPLA2-X) 影响宿主新陈代谢. 缺少sPLA2-X会导致肥胖和胰岛素抵抗,可通过omega-3脂肪酸和短链脂肪酸逆转.
科学领域:
- 微生物学 微生物学
- 代谢过程中的代谢.
- 免疫学 免疫学 免疫学
背景情况:
- 肠道微生物群在宿主生理功能中起着至关重要的作用,包括新陈代谢和免疫力.
- 分泌的脂酶A2组X (sPLA2-X) 主要存在于结肠上皮细胞中,在代谢和免疫组织中存在有限.
研究的目的:
- 研究结肠sPLA2-X在宿主新陈代谢中的作用及其与肠道微生物群的相互作用.
- 阐明sPLA2-X缺乏影响肥胖和相关代谢障碍的机制.
主要方法:
- 使用了sPLA2-X缺乏 (Pla2g10-/-) 的小鼠和野生型 (Pla2g10+/+) 的 littermates.
- 服用抗生素并采用共同住房策略来评估微生物群的参与.
- 分析了结肠炎症,上皮损伤,脂肪酸概况 (PUFAs, lysophospholipids),微生物组成 (Clostridium物种) 和短链脂肪酸 (SCFA) 水平.
- 用 ω3 PUFA 和 SCFA 补充饮食,以评估它们对代谢表型的影响.
主要成果:
- 在特定的住房条件下,Pla2g10-/-小鼠表现出严重的饮食引起的肥胖和胰岛素抵抗.
- 这些小鼠表现出结肠炎症增加,上皮损伤,PUFA和光脂产量减少,Clostridium物种减少,SCFA水平降低.
- 抗生素治疗或与野生类型小鼠共住,在Pla2g10-/-小鼠中废除了与肥胖相关的表型.
- 用 ω3 PUFA 或 SCFA 的食补充剂逆转了 Pla2g10-/- 小鼠中观察到的代谢和炎症表型.
结论:
- 结肠sPLA2-X通过肠道微生物群调节,在调节 ω3多不和脂肪酸 (PUFA) 和短链脂肪酸 (SCFA) 之间的相互作用方面发挥着重要作用.
- sPLA2-X通过调节肠道微生物环境和相关代谢物生产来间接影响系统代谢.
- 准sPLA2-X或其下游代谢物可能为肥胖和胰岛素抵抗等代谢障碍提供治疗策略.
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