Activating systemic autoimmunity: B's, T's, and tolls.

Activating systemic autoimmunity: B's, T's, and tolls.
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DOI:
10.1016/j.coi.2009.08.005
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发表时间:
2009-12
影响因子:
7
通讯作者:
Shlomchik MJ
Shlomchik MJ
中科院分区:
医学2区
文献类型:
--
作者:
Shlomchik MJ

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在自身免疫性疾病的治疗和理解方面的最新进展是B细胞靶向治疗的功效。这种疗法对几种这样的疾病是有效的,全身性自身免疫是一个典型的例子。其作用机制尚未完全确定,但阻断B细胞向T细胞呈递抗原可能很重要。T-B相互作用可能产生一个正反馈循环,放大和维持自身免疫。但是,自我耐受性是如何首先被打破以启动这个循环的呢?我建议,根据最近的数据,一个模型中,自身反应性B细胞首先被激活,独立于T细胞,但依赖于BCR和TLR信号。这些活化的B细胞然后破坏T细胞耐受性,引发全面的自身免疫。
A recent advance in the treatment and understanding of autoimmune disease has been the efficacy of B cell targeted therapy. Such therapies are effective for several such diseases, with systemic autoimmunity being a prototypical example. The mechanism of action is not fully defined, but blocking B cell Ag presentation to T cells is likely to be important. T-B interactions probably engender a positive feedback loop that amplifies and sustains autoimmunity. But how is self-tolerance first broken to initiate this loop? I propose, based on recent data, a model in which autoreactive B cells are activated first, independent of T cells, but dependent upon BCR and TLR signals. These activated B cells then break T celltolerance, initiating full-blown autoimmunity.
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