Defective autoimmune regulator-dependent central tolerance to myelin protein zero is linked to autoimmune peripheral neuropathy.

Defective autoimmune regulator-dependent central tolerance to myelin protein zero is linked to autoimmune peripheral neuropathy.
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DOI:
10.4049/jimmunol.1200493
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发表时间:
2012-05-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Anderson MS
Anderson MS
中科院分区:
其他
文献类型:
--
作者:
Su MA;Davini D;Cheng P;Giang K;Fan U;DeVoss JJ;Johannes KP;Taylor L;Shum AK;Valenzise M;Meloni A;Bour-Jordan H;Anderson MS

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慢性炎症性脱髓鞘性多发性神经病是一种以周围神经脱髓鞘和功能障碍为特征的使人衰弱的自身免疫性疾病。自身免疫反应是如何启动的,激发抗原的身份和致病效应机制还没有很好的定义。自身免疫调节因子(Aire)通过促进胸腺自身抗原的表达和自身反应性T细胞的缺失在中枢耐受中起关键作用。在此,我们利用Aire功能低下的小鼠和两名Aire突变的患者来确定Aire缺乏如何导致自发性自身免疫性周围神经病变。在小鼠和人类中针对外周神经的自身免疫都靶向髓磷脂蛋白零(P0),这是一种在胸腺中表达受Aire调节的抗原。与胸腺耐受缺陷一致,CD 4 + T细胞足以在小鼠中转移疾病并在浸润的外周神经中产生IFN-γ。我们的研究结果表明,有缺陷的Aire介导的中枢耐受P0启动自身免疫性Th 1效应器对周围神经的反应。
Chronic Inflammatory Demyelinating Polyneuropathy is a debilitating autoimmune disease characterized by peripheral nerve demyelination and dysfunction. How the autoimmune response is initiated, identity of provoking antigens, and pathogenic effector mechanisms are not well-defined. The Autoimmune Regulator (Aire) plays a critical role in central tolerance by promoting thymic expression of self-antigens and deletion of self-reactive T cells. Here, we utilized mice with hypomorphicAire function and two patients with Aire mutations to define how Aire deficiency results in spontaneous autoimmune peripheral neuropathy. Autoimmunity against peripheral nerves in both mice and humans targets Myelin Protein Zero (P0), an antigen whose expression is Aire-regulated in the thymus. Consistent with a defect in thymic tolerance, CD4+ T cells are sufficient to transfer disease in mice and produce IFN-gamma in infiltrated peripheral nerves. Our findings suggest that defective Aire-mediated central tolerance to P0 initiates an autoimmune Th1 effector response toward peripheral nerves.
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