The CD46-Jagged1 interaction is critical for human TH1 immunity.

The CD46-Jagged1 interaction is critical for human TH1 immunity.
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DOI:
10.1038/ni.2454
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发表时间:
2012-12
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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CD46是一种补体调节剂,具有重要的免疫相关作用。CD46作为一种病原体受体,是诱导分泌干扰素-γ (IFN-γ)的T辅助1 (TH1)效应T细胞并随后转换为产生白细胞介素-10 (IL-10)的调节性T细胞的有效共刺激物。在这里,我们发现Notch蛋白家族成员Jagged1是CD46的一个新的生理配体。此外,CD46在T细胞活化过程中调节Notch受体和配体的表达,CD46-Notch串扰的干扰阻碍IFN-γ诱导和IL-10转换。重要的是,来自cd46缺陷患者和亚形态Jagged1突变(Alagille综合征)患者的CD4+ T细胞在体外和体内都不能产生适当的TH1反应,这表明CD46-Jagged1串扰是这些患者亚群中反复感染的原因。
CD46 is a complement regulator with important immune-related roles. CD46 functions as a pathogen receptor and is a potent co-stimulator for the induction of interferon-γ (IFN-γ)-secreting T helper 1 (TH1) effector T cells and their subsequent switch into interleukin-10 (IL-10)-producing regulatory T cells. Here, we identify the Notch protein family member Jagged1 as a new physiological ligand for CD46. Further, CD46 regulates Notch receptors and ligands expression during T cell activation and disturbance of the CD46-Notch crosstalk impedes IFN-γ induction and IL-10 switching. Importantly, CD4+ T cells from CD46-deficient patients and patients with hypomorphic Jagged1 mutations (Alagille Syndrome) fail to mount appropriate TH1 responses in vitro and in vivo suggesting that CD46-Jagged1 crosstalk is responsible for the recurrent infections in subpopulations of these patients.
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