HLA autoimmune risk alleles restrict the hypervariable region of T cell receptors.

HLA autoimmune risk alleles restrict the hypervariable region of T cell receptors.
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DOI:
10.1038/s41588-022-01032-z
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发表时间:
2022-04
期刊:
影响因子:
30.8
通讯作者:
Raychaudhuri, Soumya
Raychaudhuri, Soumya
中科院分区:
生物学1区
文献类型:
--
作者:
Ishigaki, Kazuyoshi;Lagattuta, Kaitlyn;Luo, Yang;James, Eddie;Buckner, Jane;Raychaudhuri, Soumya

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人类白细胞抗原(HLA)基因的多态性强烈影响自身免疫性疾病的风险。HLA风险等位基因可能会影响胸腺选择,以增加对自身抗原反应的T细胞受体(TCR)的频率(中心假设)。然而,对人类自身免疫的研究几乎没有提供支持中心假设的证据。在这里,我们研究了HLA等位基因对TCR组成的影响,在高度多样化的互补决定区3(CDR3),赋予抗原识别。我们观察到出乎意料的强HLA-CDR3关联。在HLA-DRB 1氨基酸位置13处发现了最强的关联,该位置介导了多种自身免疫性疾病的遗传风险。我们鉴定了由HLA风险等位基因富集的多个CDR3氨基酸特征。此外,由HLA风险等位基因促进的CDR 3特征在候选致病性TCR中比对照TCR更富集(例如,类风湿性关节炎患者中的瓜氨酸表位特异性TCR)。总之,这些结果提供了新的遗传证据支持中心假设。
Polymorphisms in the human leukocyte antigen (HLA) genes strongly influence autoimmune disease risk. HLA risk alleles may influence thymic selection to increase the frequency of T cell receptors (TCRs) reactive to autoantigens (central hypothesis). However, research in human autoimmunity has provided little evidence supporting the central hypothesis. Here we investigated the influence of HLA alleles on TCR composition at the highly diverse complementarity determining region 3 (CDR3), which confers antigen recognition. We observed unexpectedly strong HLA-CDR3 associations. The strongest association was found at HLA-DRB1 amino acid position 13, the position that mediates genetic risk for multiple autoimmune diseases. We identified multiple CDR3 amino acid features enriched by HLA risk alleles. Moreover, the CDR3 features promoted by HLA risk alleles are more enriched in candidate pathogenic TCRs than control TCRs (e.g., citrullinated-epitope-specific TCRs in rheumatoid arthritis patients). Together, these results provide novel genetic evidence supporting the central hypothesis.
DOI: 10.1084/jem.20011194
发表时间: 2002-03-04
期刊: The Journal of experimental medicine
影响因子: --
作者:
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