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酸盐-GPR31轴诱导LysoDC树突突突出到M细胞口袋,以有效的免疫反应

Katsuhiro Nakanishi¹, Takayuki Ajiro¹, Kaito Yukishima¹

¹Laboratory of Microbiology and Immunology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan.

|August 1, 2025

概括

细菌酸盐通过通过G蛋白结合受体31 (GPR31) 激活酶表达树突细胞 (LysoDCs) 来增强肠道免疫力. 这促进了病原体清除和T细胞反应,赋予了对感染的抵抗力.

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:

皮耶斑块 (PPs) 是肠道免疫的关键,但基底的细胞对抗原的捕获知之甚少.
PPs中的微 (M) 细胞转移病原体,但下游免疫细胞激活机制需要阐明.

研究的目的:

研究细菌代谢物在调节Peyer补丁中的单核细胞对抗原捕获中的作用.
阐明原酸影响树突细胞功能和肠道免疫力的机制.

主要方法:

向口服感染Listeria monocytogenes的野生类型和GPR31缺乏的小鼠施用pyruvate.
对树突细胞形态,抗原吸收,基因表达和迁移模式的分析.
评估T细胞反应 (Th1,细胞毒性T细胞) 和宿主对感染的抵抗力.

主要成果:

通过GPR31.1,pyruvate诱导特定树突细胞 (LysoDC) 突出进入M细胞口袋.
酸盐以GPR31依赖的方式增强了Listeria monocytogenes的LysoDC吸收.
GPR31信号增强了抗原处理,改变了基因表达,促进了LysoDC迁移,并增强了病原体特异性T细胞反应.

结论:

酸盐-GPR31轴对于协调肠道保护性免疫是至关重要的.
通过GPR31介导的免疫激活,Pyruvate的使用赋予了对Listeria monocytogenes感染的显著抵抗力.
这项研究揭示了一种新的细菌代谢物驱动的肠道免疫调节机制.

关键词:

GPCR:树突细胞细胞体.李斯特里亚单细胞原生菌Listeria monocytogenes 皮耶尔的补丁这是一种共同的代谢物.

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