PD-1 调节着 ILC3 驱动的肠道免疫力和恒常性
Nicolas Jacquelot1, Le Xiong2, Wang H J Cao3
1Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Canada; Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, Canada; Arnie Charbonneau Cancer Research Institute, Calgary, Canada.
Mucosal immunology
|March 16, 2024
概括
在肠道免疫细胞 (ILC3) 上的编程细胞死亡1 (PD-1) 增强了对肠道健康至关重要的INTERLEUKIN-22 (IL-22) 生产. PD-1信号传递对于保持肠道屏障完整性和恒常性至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 肠道第3组先天性淋巴细胞 (ILC3) 产生的介质素-22 (IL-22) 对于肠道平衡至关重要.
- 失调的IL-22水平与肠上皮质屏障缺陷和瘤发展有关.
- 编程细胞死亡1 (PD-1) 是一种已知的免疫检查点,主要研究癌症和慢性感染.
研究的目的:
- 在ILC3.3中识别与IL-22产生相关的基因.
- 调查PD-1表达在ILC3在肠道平衡和炎症中的作用.
- 描述表达ILC3的PD-1的功能性和代谢性质.
主要方法:
- 单细胞RNA测序用于识别ILC3.3.中的基因表达模式.
- 在各种条件下 (微生物群,炎症,IL-23,诺奇配体) 对ILC3上的PD-1表达的分析.
- 评估ILC3的功能,新陈代谢,增殖和活性氧物种水平.
- 大肠炎的实验模型,以评估PD-1在体内发挥的作用.
主要成果:
- ILC3的一个子集构成性表达了PD-1并表现出增强的IL-22生产能力.
- ILC3上的PD-1表达受到微生物群,IL-23和Notch信号的影响.
- PD-1+ ILC3表现出明显的代谢特征,增强的增殖和增强的抗氧化能力.
- 在ILC3中丧失PD-1信号,在炎症期间损害了IL-22的产生和肠道屏障功能.
- 在ILC3上的PD-1缺陷增加了对实验性结肠炎的敏感性.
结论:
- PD-1信号传递在调节ILLC3的IL-22产生的过程中起着新的,至关重要的作用.
- PD-1+ ILC3对于维持肠道屏障完整性和免疫平衡是非常重要的.
- 针对ILC3上的PD-1可能为炎症性肠道疾病提供治疗潜力.
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