Death receptor 6 contributes to autoimmunity in lupus-prone mice.

Death receptor 6 contributes to autoimmunity in lupus-prone mice.
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DOI:
10.1038/ncomms13957
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发表时间:
2017-01-03
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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严格限制自身反应性滤泡辅助性T(Tfh)细胞的扩增以防止诱导自身抗体依赖性免疫疾病,如系统性红斑狼疮(SLE)。在这里,我们展示了孤儿免疫调节因子死亡受体6(DR 6/TNFRSF 21)在小鼠狼疮样疾病进展中高度扩增的Tfh细胞群体上的表达。全基因组筛选揭示了syndecan-1和DR 6之间的相互作用,导致免疫抑制功能。重要的是,syndecan-1在自身反应性生发中心(GC)B细胞上特异性表达,所述细胞对于Tfh细胞的维持至关重要。GC B细胞上的多配体蛋白聚糖-1表达水平与狼疮易感小鼠品系中的Tfh细胞扩增和疾病进展相关。此外,DR 6特异性单克隆抗体抑制Tfh细胞可延缓狼疮易感小鼠的疾病进展。这些发现表明,DR 6/syndecan-1轴调节异常GC反应,并可能成为自身免疫性疾病如SLE的治疗靶点。老年中心(GC)反应由T滤泡辅助(Tfh)细胞驱动,其失调可导致自身免疫性疾病。在这里,作者表明孤儿受体DR 6是一种Tfh细胞标记物,它结合GC B细胞上的多配体蛋白聚糖-1,从而驱动狼疮易感小鼠的自身免疫。
Expansion of autoreactive follicular helper T (Tfh) cells is tightly restricted to prevent induction of autoantibody-dependent immunological diseases, such as systemic lupus erythematosus (SLE). Here we show expression of an orphan immune regulator, death receptor 6 (DR6/TNFRSF21), on a population of Tfh cells that are highly expanded in lupus-like disease progression in mice. Genome-wide screening reveals an interaction between syndecan-1 and DR6 resulting in immunosuppressive functions. Importantly, syndecan-1 is expressed specifically on autoreactive germinal centre (GC) B cells that are critical for maintenance of Tfh cells. Syndecan-1 expression level on GC B cells is associated with Tfh cell expansion and disease progression in lupus-prone mouse strains. In addition, Tfh cell suppression by DR6-specific monoclonal antibody delays disease progression in lupus-prone mice. These findings suggest that the DR6/syndecan-1 axis regulates aberrant GC reactions and could be a therapeutic target for autoimmune diseases such as SLE. Germinal centre (GC) reactions are driven by T follicular helper (Tfh) cells and their dysregulation can cause autoimmune disease. Here the authors show that the orphan receptor DR6 is a Tfh cell marker that binds syndecan-1 on GC B cells driving autoimmunity in lupus-prone mice.
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