微生物生物衍生的酸盐通过基因素脱乙酶3限制了细胞分化,以调节肠道2型免疫力
Emily M Eshleman1, Taylor Rice1, Crystal Potter2
1Division of Immunobiology, Cincinnati Children's Hospital Medical Center and Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA; Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Immunity
|January 31, 2024
概括
肠道微生物群调节肠道细胞,对2型免疫至关重要. 结合体细菌的代谢物,如丁酸盐,抑制了基因素脱乙酶3 (HDAC3) 的活性,控制了细胞分化和免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 状细胞对于粘膜组织中的2型免疫至关重要.
- 肠道微生物群对状细胞生物学的影响仍然不完全理解.
研究的目的:
- 研究肠道微生物群对肠道细胞分化和功能的影响.
- 阐明微生物群代谢物调节细胞介导免疫的分子机制.
主要方法:
- 在有或没有肠道微生物群的小鼠中评估了状细胞和2型先天性淋巴细胞诱导.
- 利用细菌殖民 (生产酸盐的细菌) 和直接的酸盐处理.
- 通过皮质内在基因缺失在体内和在人类肠道器官中检查了基因脱乙酶3 (HDAC3) 的作用.
- 测量了肠道的基因组脱乙酶活性和干细胞分化的途径.
主要成果:
- 肠道微生物群的丧失导致了酸盐诱导的状细胞增加和2型先天性淋巴细胞扩张.
- 植民于生产丁酸盐的细菌或丁酸盐治疗抑制了这种扩张,并降低了基因素脱乙酶活性.
- 在虫感染期间,HDAC3的表皮特异性删除损害了状细胞扩张和2型免疫反应.
- 丁酸盐抑制了干细胞分化成细胞,这种效应被小鼠和人类器官中HDAC3抑制模仿.
结论:
- 干细胞中涉及HDAC3的机制调节了细胞分化.
- 同位体微生物群的代谢物,如丁酸盐,抑制了这种HDAC3-介导的途径.
- 肠道微生物群通过这种HDAC3-依赖的状细胞分化途径校准肠道2型免疫力.
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