A&R:类风湿性关节炎中分泌抗体的黏膜外形成及预后价值

2022-05-07 MedSci原创 MedSci原创

循环分泌型Ig在类风湿性关节炎(RA)发病前和发病时升高。在游离分泌成分(SC)存在的情况下,分泌型 Ig可能在黏膜外形成,并且含有SC的抗瓜氨酸蛋白抗体 (ACPA)在RA关节中富集。

      目的:最近的进展表明粘膜表面在类风湿性关节炎(RA)发展的早期很重要,特别是在抗瓜氨酸蛋白抗体 (ACPA)阳性疾病中。该文章目的在于研究RA中分泌型Ig包括ACPA的水平和可能的黏膜外形成。

      方法:研究了三个患者组:1) ACPA 阳性且肌肉骨骼疼痛但无临床关节炎的患者,2) 新发RA患者,以及3)已确诊RA的患者。在基线血清样本(第1组和第2组)和配对滑液样本(第3组)中,研究者分析了总分泌IgA、总分泌IgM、游离分泌成分(SC)和含有 SCACPA。通过将RA血清和亲和纯化的ACPA与重组游离SC预孵育来研究含有SC ACPA的粘膜外形成

      结果:与健康对照组相比,早期RA患者和高危患者的血清总分泌IgA和总分泌IgM水平均升高(P<0.05与未升高水平的患者相比,具有升高的总分泌 Ig的早期RA 患者在3年的随访期间具有显著更高的疾病活动性。在随访期间发生关节炎的高危患者(82人中的39人)的基线总分泌IgA水平高于未发生关节炎的患者(P=0.041。在已确诊的RA中,血清中总分泌型IgA和总分泌型IgM水平高于滑液(P<0.0001),但根据总分泌Ig浓度调整的含SC ACPA在滑液中更高(P<0.0001)。与重组游离SC预孵育在血清以及亲和纯化的IgAIgM ACPA制剂中产生了增加的含SC ACPA反应性。

      结论:循环分泌型IgRA发病前和发病时升高。在游离SC存在的情况下,分泌型 Ig可能在黏膜外形成,并且含有SCACPARA关节中富集。这些发现为RA发展中的黏膜连接提供了重要的新线索。

 

出处:Martinsson, K., Kling, L.L., Roos-Ljungberg, K., Griazeva, I., Samoylovich, M., Paul, S., Rönnelid, J., Weitoft, T., Wetterö, J. and Kastbom, A. (2022), Extramucosal Formation and Prognostic Value of Secretory Antibodies in Rheumatoid Arthritis. Arthritis Rheumatol, 74: 801-809. https://doi.org/10.1002/art.42044

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    2022-11-03 gwc392
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    2022-05-07 lmm397
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    2022-05-07 snowpeakxu

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