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在类风湿性关节炎中,由抗MAA抗体激活巨细胞激活和炎症原始化

Marcelo Afonso¹, Jitong Sun¹, Koji Sakuraba²

¹Division of Rheumatology, Department of Medicine Solna. Karolinska Institutet, Stockholm, Sweden.

Clinical immunology (Orlando, Fla.)

|July 5, 2024

概括

类风湿性关节炎 (RA) 自身抗体针对马隆迪阿尔代-乙甲蛋白添加物 (抗MAA) 主要的炎症巨细胞. 这些抗MAA抗体可能会导致RA风险人群的早期关节炎症.

科学领域:

免疫学免疫学免疫学
类风湿病学类风湿病学
分子生物学分子生物学

背景情况:

类风湿性关节炎 (RA) 涉及复杂的自身免疫反应.
马隆迪甲基-乙甲基蛋白添加物 (MAA) 是自身抗体的点.
抗MAA抗体在RA发病的作用尚未完全理解.

研究的目的:

研究抗MAA自身抗体对巨细胞功能和炎症反应的影响.
探索抗MAA抗体在RA早期的潜在作用.

主要方法:

巨细胞暴露于抗MAA抗体.
对基因表达和化基因生产的分析.
在托尔类受体 (TLR) 激活时评估细胞因子概况.
在小鼠模型中评估关节炎原性.
在高危人群中,抗MAAIgG水平与炎症媒介的相关性分析.

主要成果:

反MAA抗体诱导了巨细胞中显著的基因表达重编程和化学激素生产 (CCL22,CCL24).
用抗MAA抗体进行预治疗后,在TLR激活后,增强了炎症性细胞因子的产生.
在由抗MAA抗体诱导的巨细胞激活中观察到克隆多样性.
在小鼠中,抗MAA抗体并没有产生关节炎,但改变了关节基因表达.
在RA风险人群中,抗MAAIgG水平与关节炎发病前和发病时的炎症媒介相关.

结论:

特定的IgG抗MAA克隆可以通过FcγR介导的通路预激活巨细胞.
这种预激活可以在系统性疾病发作之前为关节的炎症做准备.
反MAA抗体可能有助于早期RA发展的炎症级联.

关键词:

这是一种抗MAAA的药物.自动抗体是一种自身抗体.炎症炎症是一种炎症.巨细胞是一个巨细胞.类风湿性关节炎类风湿性关节炎类风湿性关节炎风险RA阶段的风险RA阶段

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