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类风湿性关节炎的素瘤富含抗原补充蛋白质
Mario Navarrete1, Khushali Trivedi1, Clarissa Klenke1
1Department of Internal Medicine, University of Manitoba, RR-149 800 Sherbrook St. R3E1R9, Winnipeg, Canada.
类风湿性关节炎 (RA) 中的细胞化涉及特定的补充蛋白,如C9和补充因子I (CFI),作为自身抗原. 这项研究在RA患者中发现了这些素蛋白和相关自身抗体的高水平.
科学领域:
- 免疫学 免疫学 免疫学
- 蛋白质组学是指蛋白质组学.
- 类风湿病学 类风湿病学
背景情况:
- 细胞化是一种关键的翻译后修饰和类风湿性关节炎 (RA) 的自身抗原.
- 在RA中驱动自身抗体反应的特定素蛋白仍然不完全理解.
- 了解循环素瘤对于阐明RA的发病过程至关重要.
研究的目的:
- 在RA患者中进行循环林瘤的无监督蛋白质组分析.
- 为了识别可能在RA中充当自身抗原的特定素蛋白.
- 确定素化对蛋白质结构和RA中自身抗体生成的影响.
主要方法:
- 质谱法用于分析RA患者和对照者的素蛋白血清蛋白.
- 在更大的队列中测量了素蛋白 (cit-C9,cit-CFI) 和免疫复合物的水平.
- 对素C9及其的自身抗体被量化,同时对素C9的in-silico结构分析.
主要成果:
- 差异蛋白质组分析显示,RA素瘤中补充蛋白的表达更高.
- 与对照组相比,在RA患者中观察到素C9 (cit-C9) 和补充因子I (cit-CFI) 的水平升高.
- 在抗氨酸蛋白抗体 (ACPA) 阳性个体 (亲属和RA患者) 中,Cit-C9免疫复合体和自身抗体显著增加,在RA中对氨酸C9的活性增强.
结论:
- 该研究确定了素补充蛋白作为循环RA素瘤中显著的自身抗原.
- 这些发现突显了素补充因子在RA自身免疫性中的作用.
- 在C9中由素化诱导的结构变化可能有助于RA的自身免疫反应.
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