卡塞普辛W抑制了外围调节T细胞的粘膜免疫静止
Jian Li1, Zuojia Chen1, Girak Kim1
1Experimental Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
Science advances
|July 12, 2023
概括
甲素W (CTSW) 通过抑制IL-2受体信号传递来抑制调节性T细胞分化. 失去CTSW可以增强调控性T细胞的产生,从而防止肠道炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 周围调节性T细胞 (pTreg) 对粘膜免疫耐受性和抗炎反应至关重要.
- 互白素-2受体 (IL-2R) 信号传递对于pTreg细胞的发育,扩张和维护至关重要.
- 调节pTreg细胞上IL-2R表达的精确分子机制尚不清楚.
研究的目的:
- 研究控制IL-2R信号传递和pTreg细胞分化的分子机制.
- 确定粘膜免疫中pTreg细胞功能的关键调节者.
主要方法:
- 在转化生长因子-β刺激下研究了pTreg细胞中的Cathepsin W (CTSW) 表达.
- 在动物模型中评估了CTSW缺乏对pTreg细胞生成和肠道炎症的影响.
- 研究了CTSW与CD25的相互作用及其对信号传感器和转录5 (STAT5) 激活激活器的作用.
主要成果:
- 囊蛋白酶CTSW在pTreg细胞中受到高度诱导,并本质上抑制它们的分化.
- 失去CTSW会导致增加pTreg细胞的产生,并防止肠道炎症.
- CTSW通过在细胞质中处理CD25来抑制IL-2R信号传递,从而限制STAT5激活和pTreg细胞增殖.
结论:
- CTSW充当关键的守门员,校准pTreg细胞的分化和功能.
- CTSW通过调节pTreg细胞数量和活动来维持粘膜免疫静止起着关键作用.
- 针对CTSW可能为影响粘膜组织的炎症状况提供治疗策略.
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