在风湿性关节炎中免疫球蛋白G子类特定的糖化变化
Dániel Szabó1,2, Balázs Gyebrovszki3, Eszter Szarka3
1MS Proteomics Research Group, HUN-REN Research Centre for Natural Sciences, 1117 Budapest, Hungary.
International journal of molecular sciences
|October 16, 2025
概括
这项研究表明,在类风湿性关节炎 (RA) 中,抗素蛋白抗体 (ACPA) 的N-糖化与疾病严重程度相关. 异形特异性分析对于理解IgG糖化中的这些复杂变化至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
- 类风湿病学 类风湿病学
背景情况:
- 风湿性关节炎 (RA) 是一种常见的炎症性多关节炎.
- 抗素蛋白抗体 (ACPA) 是关键的诊断标志物,在60-80%的患者中存在.
- 对IgG自身抗体的FcN-糖化显著影响了它们的效应器功能.
研究的目的:
- 在相同的RA患者和健康对照中,将ACPA IgG的Fc N-糖化与非ACPA IgG进行比较.
- 在RA中研究IgG异形特异性糖基化模式.
- 为了将糖基化特征与临床炎症标志物和疾病活性评分相关联.
主要方法:
- 从患者和对照组中分离ACPA和正常血清IgG.
- 素消化IgG和混合物分离使用逆相纳米LC.
- 使用布鲁克马克西斯II Q-TOF质谱仪对糖形丰度的分析.
主要成果:
- 发现了ACPA IgG的银河系化/化与炎症标志物 (CRP,ESR) 和类风湿因子 (RF) 之间显著的负相关性.
- 非ACPA IgG 显示了糖化和疾病活性评分 (DAS) 之间的显著负相关性.
- 对同位体特异性分析显示,IgG1解释了分割GlcNAc的变化,而fucosylation不变的结果来自两个同位体的对立变化.
结论:
- 在RA患者中,IgG的FcN-糖化模式,特别是以异型特异的方式发生变化.
- 对ACPA IgG和非ACPA IgG的糖化表明与疾病标志物有明显的相关性.
- 异形特异性分析对于全面了解RA发病的IgG糖化和作为潜在的生物标志物至关重要.
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