Regulation of autoantibody activity by the IL-23-T(H)17 axis determines the onset of autoimmune disease.

Regulation of autoantibody activity by the IL-23-T(H)17 axis determines the onset of autoimmune disease.
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DOI:
10.1038/ni.3579
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发表时间:
2017-01
期刊:
影响因子:
30.5
通讯作者:
--
中科院分区:
医学1区
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--
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导致自身抗体驱动疾病的检查点和机制尚未完全了解。在这里,我们确定了轴的白细胞介素23(IL-23)和辅助T细胞的TH 17子集作为一个决定性因素,控制内在的炎症活动的自身抗体,并触发自身免疫性关节炎的临床发作。通过以IL-22和IL-21依赖的方式指导B细胞,TH 17细胞调节新分化的抗体产生细胞中β-半乳糖苷α 2,6-唾液酸转移酶1的表达,并确定随后出现的浆细胞产生的免疫球蛋白G(IgG)的糖基化特征和活性。无症状的人类风湿关节炎(RA)特异性自身抗体显示出相同的变化,在活动和糖基化的自身反应性IgG抗体转移到炎症阶段的RA之前,因此,我们的研究结果确定了IL-23-TH 17细胞依赖性途径,控制自身抗体的活性和揭露预先存在的突破免疫耐受。
The checkpoints and mechanisms that contribute to autoantibody-driven disease are as yet incompletely understood. Here we identified the axis of interleukin 23 (IL-23) and the TH17 subset of helper T cells as a decisive factor that controlled the intrinsic inflammatory activity of autoantibodies and triggered the clinical onset of autoimmune arthritis. By instructing B cells in an IL-22- and IL-21-dependent manner, TH17 cells regulated the expression of β-galactoside α2,6-sialyltransferase 1 in newly differentiating antibody-producing cells and determined the glycosylation profile and activity of immunoglobulin G (IgG) produced by the plasma cells that subsequently emerged. Asymptomatic humans with rheumatoid arthritis (RA)-specific autoantibodies showed identical changes in the activity and glycosylation of autoreactive IgG antibodies before shifting to the inflammatory phase of RA; thus, our results identify an IL-23–TH17 cell–dependent pathway that controls autoantibody activity and unmasks a preexisting breach in immunotolerance.
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