Autoimmunity against fibrinogen mediates inflammatory arthritis in mice.

Autoimmunity against fibrinogen mediates inflammatory arthritis in mice.
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DOI:
10.4049/jimmunol.0901639
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发表时间:
2010-01-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Robinson WH
Robinson WH
中科院分区:
其他
文献类型:
--
作者:
Ho PP;Lee LY;Zhao X;Tomooka BH;Paniagua RT;Sharpe O;BenBarak MJ;Chandra PE;Hueber W;Steinman L;Robinson WH

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类风湿性关节炎(RA)是一种以抗瓜氨酸蛋白抗体(anti-citrullinated protein Abs)为特征的自身免疫性滑膜炎,但抗瓜氨酸蛋白自身免疫在RA发病机制中的确切靶点和作用尚不清楚。可被瓜氨酸化的纤维蛋白原最近已成为一种候选自身抗原。为了确定针对纤维蛋白原的自身免疫是否可以介导炎性关节炎,我们用纤维蛋白原免疫了多种常见的小鼠品系,发现DBA/1和SJL小鼠发生了炎性和糜烂性关节炎。患有纤维蛋白原诱导的关节炎(FIA)的小鼠具有产生促炎细胞因子IL-6、IL-17、TNF-α和IFN-γ的纤维蛋白原反应性T细胞。FIA可以与来自患病小鼠的血浆或纤维蛋白原特异性T细胞过继转移。FIA小鼠具有类风湿因子、循环免疫复合物和抗环瓜氨酸肽抗体,所有这些都是人类RA的特征。这些观察结果表明,纤维蛋白原在小鼠中是致关节炎的,FIA的发病机制是由自身抗体和纤维蛋白原反应性T细胞介导的。
Rheumatoid arthritis (RA) is an autoimmune synovitis characterized by the presence of anticitrullinated protein Abs, although the exact targets and role of anticitrullinated protein autoimmunity in the pathogenesis of RA remain to be defined. Fibrinogen, which can be citrullinated, has recently emerged as a candidate autoantigen. To determine whether autoimmunity against fibrinogen can mediate inflammatory arthritis, we immunized a variety of common mouse strains with fibrinogen and found that DBA/1 and SJL mice developed an inflammatory and erosive arthritis. Mice with fibrinogen-induced arthritis (FIA) possess fibrinogen-reactive T cells that produce the proinflammatory cytokines IL-6, IL-17, TNF-α, and IFN-γ. FIA can be adoptively transferred with either plasma or fibrinogen-specific T cells from diseased mice. Mice with FIA possess rheumatoid factor, circulating immune complexes, and anticyclic citrullinated peptide Abs, all of which are characteristic of human RA. These observations demonstrate that fibrinogen is arthritogenic in mice and that the pathogenesis of FIA is mediated by both autoantibodies and fibrinogen-reactive T cells.
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