OLFM4通过促进IL-22在肠道中的ILC3来调节肠道炎症
Zhe Xing1, Xinyao Li2, Junyu He2
1Pediatric Intensive Care Unit, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences); Department of Immunology, School of Basic Medical Sciences; Department of Clinical Laboratory, the Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China.
奥尔法托美丁4 (OLFM4) 调节3组先天性淋巴细胞 (ILC3s) 和IL-22的产生,影响肠道炎症. 缺少OLFM4会损害ILC3的功能,增加对感染的易感性和对结肠炎的抗性.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
背景情况:
- 第三组先天性淋巴细胞 (ILC3s) 在肠道炎症中至关重要.
- Olfactomedin 4 (OLFM4) 在结肠表达,并与大肠炎有关.
研究的目的:
- 阐明OLFM4在ILC3介导肠道炎症中的作用机制.
- 为了确定OLFM4作为IL-22-产生ILC3s的调节者.
主要方法:
- 在炎症期间研究了人类和小鼠结肠ILC3s中的OLFM4表达.
- 使用了OLFM4缺乏的小鼠和OLFM4缺乏的小鼠在RORγt区.
- 分析了IL-22的产生,亡和信号通路 (ASK1-p38 MAPK,RORγt).
主要成果:
- 在肠道炎症期间,OLFM4表达在结肠ILC3s上调.
- OLFM4 缺乏导致IL-22 生产受损和ILC3s中病原体耐药性缺陷.
- 缺少OLFM4会增加对细菌感染的易感性和对抗CD40诱导的大肠炎的抵抗力.
- OLFM4 缺陷通过 ASK1-p38 MAPK 信号向下调节 RORγt 蛋白,影响 IL-22+ILC3 激活.
结论:
- OLFM4作为IL-22+ILC3.3的积极调节剂.
- OLFM4-MTDH复合体调节p38/RORγt信号传递,这对于IL-22+ILC3激活至关重要.
- OLFM4对于控制肠道炎症和组织平衡至关重要.
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