细胞介导小肠抗菌景观的共生重塑
Connie Fung1, Lisa M Fraser2, Gabriel M Barrón1,3
1Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305.
概括
康门斯原生体酸盐增强了帕内斯细胞数量,并改变了肠道中的抗菌. 细胞检测到这种代谢物,导致肠道免疫力和细菌组成的变化.
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:
- 像*Tritrichomonas musculis*这样的共体原生体会产生影响宿主免疫力的代谢物.
- 酸盐是一种关键的代谢物,参与肠道内的宿主-微生物相互作用.
- 细胞是专门的肠上皮细胞,检测环境线索并启动免疫反应.
研究的目的:
- 研究微生物酸盐在调节肠上皮细胞群和抗微生物 (AMP) 表达中的作用.
- 阐明由细胞感知酸盐影响肠道免疫力和微生物群组成的机制.
- 为了确定细胞是否可以在细菌失生症期间感知酸尖,并调节AMP的产生.
主要方法:
- 分析小鼠小肠中的帕内斯细胞数量和AMP表达.
- 实验使用在状细胞化学传感元件中遗传缺陷的小鼠.
- 测量介素-13水平和评估肠道微生物群的组成.
- 诱导细菌失生症以观察酸盐水平的变化和AMP反应.
主要成果:
- 微生物酸盐显著增加了帕内斯细胞数量,并改变了小肠的AMP格局.
- 酸盐驱动的上皮质重塑需要功能性状细胞化学传感通路.
- 酸盐刺激的细胞激活刺激了2型免疫,导致IL-13介导的表皮细胞和AMP的变化.
- 2型免疫降低了整体细菌负荷,并改变了小肠微生物群的组成.
- 状细胞检测出因失生症而产生的糖酸峰,并调节了AMP的产生.
结论:
- 一个单一的代谢物,苏酸盐,由共生动物产生的,可以深刻影响肠道AMP概况.
- 状细胞充当关键传感器,利用SUCNR1和苏酸来调节上皮质反应并维持细菌平衡.
- 这种机制突出了一个新的途径,即开始性微生物影响宿主防御和肠道微生物生态.
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