在自身免疫性疾病的发展过程中,ROS-依赖的SOCS3上调破坏了调节性T细胞的稳定性
Hiroki Satooka1, Yuzuki Nakamura1, Takako Hirata1
1Department of Fundamental Biosciences, Shiga University of Medical Science, Otsu, Shiga, 520-2192, Japan.
Redox biology
|March 16, 2025
概括
反应性氧物种 (ROS) 在类风湿性关节炎 (RA) 等自身免疫性疾病中破坏调节性T细胞 (Treg) 稳定性. 抗氧化剂通过抑制通过NADPH氧化酶2 (Nox2) 的ROS产生恢复Treg功能,这表明了一个新的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 类风湿病学 类风湿病学
背景情况:
- 自身免疫性疾病,包括类风湿性关节炎 (RA),与高反应性氧物种 (ROS) 有关.
- 自免疫性中ROS的特定分子标在很大程度上仍未定义.
- 调节性T细胞 (Tregs) 在维持免疫耐受性方面发挥着至关重要的作用.
研究的目的:
- 阐明ROS在Treg在自身免疫性疾病期间的不稳定性中的作用.
- 确定ROS影响Treg功能的分子机制.
- 探索针对ROS途径在RA治疗干预的潜力.
主要方法:
- 使用了对RA的原诱导性关节炎 (CIA) 鼠标模型.
- 服用抗氧化剂,以评估它们对炎症和免疫反应的影响.
- 分析了Treg频率,SOCS3表达,PTEN氧化以及Akt/mTOR/STAT3信号通路.
- 研究了NADPH氧化酶2 (Nox2) 在Tregs内的ROS产生中的作用.
主要成果:
- 在CIA小鼠中,抗氧化剂治疗显著降低了关节炎症,自身抗体的产生和效应T细胞的反应.
- 在CIA小鼠中,Treg频率下降,但通过抗氧化剂治疗恢复.
- 从RA患者和CIA小鼠的Tregs中升级的SOCS3与ROS依赖的PTEN氧化和随后的信号传递有关.
- 鉴定出NADPH氧化酶2 (Nox2) 是ROS的主要来源,有助于Treg不稳定性和Treg频率降低.
结论:
- 对Treg稳态的ROS依赖性破坏是自身免疫性疾病发展和进展的关键机制.
- 准Nox2衍生的ROS可能代表RA和其他自身免疫性疾病的有前途的治疗策略.
- 了解ROS介导的Treg不稳定性为自身免疫中的免疫失调提供了新的见解.
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