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雷多克斯调节LAT增强T细胞介导的炎症
Jaime James1, Ana Coelho1, Gonzalo Fernandez Lahore1
1Medical Inflammation Research, Division of Immunology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177 Stockholm, Sweden.
Antioxidants (Basel, Switzerland)
|April 27, 2024
概括
活性氧物种 (ROS) 通过LAT分子调节T细胞激活,影响诸如类风湿性关节炎等自身免疫性疾病. 向LAT为T细胞依赖性炎症提供了一个潜在的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 转毒生物学 转毒生物学
背景情况:
- 中性细胞分裂因子1 (Ncf1) 基因多态性与自身免疫性疾病有关,这表明减少氧化突发的作用.
- 反应性氧物种 (ROS) 影响T细胞功能,但精确的信号通路尚未完全理解.
- 激活T细胞的适配蛋白链接器 (LAT) 对于T细胞受体信号传递至关重要,并且具有对氧化还原敏感的氨酸残留物.
研究的目的:
- 通过向LAT适应分子,研究ROS是否通过向LAT适应分子来调节T细胞依赖性炎症.
- 阐明特定的氨酸残留物 (C120和C172) 在LAT的氧化还原调节中的作用.
- 评估对T细胞激活和自身免疫性疾病模型的氧化还原无敏LAT对T细胞激活的影响.
主要方法:
- 在LAT (LATSS) 中产生氨酸-氨酸突变的小鼠模型.
- 对LAT局部化和酸化的分析,以应对氧化还原变化.
- 在LATSS小鼠中评估T细胞种群,并与NCF1突变 (NCF1m1j) 结合使用.
- 使用原诱导关节炎 (CIA) 模型评估T细胞依赖的自身免疫炎症.
主要成果:
- 通过C120和C172对LAT的氧化还原调节会影响其细胞局部化和酸化.
- LATSS小鼠表现出改变的胸细胞和外围T细胞数量.
- 红氧不敏感的LAT加剧了T细胞依赖的自身免疫炎症在CIA.
- 这种恶化在ROS缺乏的NCF1m1j小鼠中被撤销,表明NCF1依赖的ROS参与其中.
结论:
- LAT是一种氧化还原调节分子,其功能是抑制T细胞激活.
- 在抗原呈现细胞中由NCF1产生的ROS向LAT调节T细胞反应.
- LAT的氧化还原调节是控制T细胞介导的自身免疫炎症的关键机制,为类风湿性关节炎和相关疾病提供潜在的治疗点.
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