Peli1 negatively regulates noncanonical NF-κB signaling to restrain systemic lupus erythematosus.

Peli1 negatively regulates noncanonical NF-κB signaling to restrain systemic lupus erythematosus.
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Peli1 负向调节非典型 NF-kappaB 信号传导以抑制系统性红斑狼疮。

DOI:
10.1038/s41467-018-03530-3
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发表时间:
2018-03-19
影响因子:
16.6
通讯作者:
Xiao Y
Xiao Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Liu J;Huang X;Hao S;Wang Y;Liu M;Xu J;Zhang X;Yu T;Gan S;Dai D;Luo X;Lu Q;Mao C;Zhang Y;Shen N;Li B;Huang M;Zhu X;Jin J;Cheng X;Sun SC;Xiao Y

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系统性红斑狼疮(SLE)的特征是浆细胞不受控制地分泌自身抗体。虽然浆细胞和自身抗体在SLE中的功能重要性已经得到很好的确立,但控制自身抗体产生的潜在分子机制仍然知之甚少。在这里,我们表明,Peli 1具有B细胞的内在功能,以防止狼疮样自身免疫小鼠。B细胞中Peli 1缺陷通过非经典NF-κB信号传导诱导自身抗体产生Peli 1作为E3连接酶与NF-κB诱导激酶(NIK)结合,介导NIK Lys 48泛素化和降解。Peli 1过表达抑制非经典NF-κB活化并加重狼疮样疾病在人类中,PELI 1水平与SLE患者的疾病严重程度呈负相关。我们的研究结果证实Peli 1在抑制狼疮样疾病发病机制的背景下是非经典NF-κB通路的负调节因子。系统性红斑狼疮(SLE)是一种由自身抗体介导的自身免疫性疾病。在此,作者表明E3泛素连接酶Peli 1负调节非经典NF-κB信号传导以抑制小鼠狼疮样症状,并且Peli 1表达与人类SLE严重程度负相关。
Systemic lupus erythematosus (SLE) is characterized by uncontrolled secretion of autoantibodies by plasma cells. Although the functional importance of plasma cells and autoantibodies in SLE has been well established, the underlying molecular mechanisms of controlling autoantibody production remain poorly understood. Here we show that Peli1 has a B cell-intrinsic function to protect against lupus-like autoimmunity in mice. Peli1 deficiency in B cells induces autoantibody production via noncanonical NF-κB signaling. Mechanically, Peli1 functions as an E3 ligase to associate with NF-κB inducing kinase (NIK) and mediates NIK Lys48 ubiquitination and degradation. Overexpression of Peli1 inhibits noncanonical NF-κB activation and alleviates lupus-like disease. In humans, PELI1 levels negatively correlate with disease severity in SLE patients. Our findings establish Peli1 as a negative regulator of the noncanonical NF-κB pathway in the context of restraining the pathogenesis of lupus-like disease. Systemic lupus erythematosus (SLE) is an autoimmune disorder mediated by excessive autoantibodies. Here the authors show that an E3 ubiquitin ligase, Peli1, negatively modulates noncanonical NF-κB signaling to restrain lupus-like symptoms in mice, and that Peli1 expression inversely correlates with SLE severity in humans.
DOI: 10.1002/art.10541
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