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在类风湿性关节炎中探索IL-21/IL-21R信号通路:对同胞细胞存活和疾病进展的影响
Qiuhua Chen1, Shuntao Lin2, Sijie Wang3
1The First Clinical Medical College of Jinan University, Guangzhou, GuangDong, China.
Immunological investigations
|August 4, 2025
概括
干白素-21 (IL-21) 和它的受体 (IL-21R) 通过USP18.通过平衡自和内质网膜应激 (ERS) 来促进类风湿性关节炎纤维细胞样同胞细胞 (RA-FLS) 存活率. 这一途径影响了类风湿性关节炎的关节损伤.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 类风湿病学 类风湿病学
背景情况:
- 在类风湿性关节炎 (RA) 中,纤维细胞样同胞细胞 (FLS) 导致关节损伤.
- FLS生存的机制,特别是在内质网膜应激 (ERS) 期间的抗亡途径,仍然不清楚.
研究的目的:
- 为了研究介质素-21 (IL-21) /IL-21受体 (IL-21R) 途径在ERS下RA-FLS存活率中的作用.
- 阐明控制IL-21/IL-21R介导的FLS生存的分子机制.
主要方法:
- 利用临床数据,体外细胞实验和体内老鼠RA模型.
- 进行了转录组分析,以确定下游效应因子.
- 评估了自标志物 (LC3II/I,p62) 和ERS标志物 (GRP78,CHOP,GSDMD) 的使用情况.
主要成果:
- 血清IL-21水平升高与RA疾病活性和抗CCP抗体相关.
- IL-21/IL-21R信号传递通过上调自和抑制亡来促进RA-FLS在ERS下的生存.
- USP18被确定为一个关键的下游调解器;它的沉默取消了IL-21R的保护作用,并增加了GSDMD.
- 在体内,IL-21R抑制在RA模型中减少了关节炎症和软骨退化.
结论:
- IL-21/IL-21R通路通过"自-ERS平衡"机制调节RA-FLS存活率.
- USP18/GSDMD轴对IL-21R在RA-FLS生存中的功能至关重要.
- 准IL-21/IL-21R通路可能为类风湿性关节炎提供治疗潜力.
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