非编码的自身免疫风险变体定义了ICOS在T外围辅助细胞发育中的作用
Taehyeung Kim1, Marta Martínez-Bonet2,3, Qiang Wang1
1Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.
Nature communications
|March 8, 2024
概括
一种与风湿性关节炎和1型糖尿病相关的遗传变异增强可诱导T细胞辅助器 (ICOS) 表达,促进外围T助手细胞 (Tph) 发育和自身免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 这是一种自身免疫力.
背景情况:
- 精细测绘确定了rs117701653,CD28/CTLA4/ICOS位点中的一个非编码SNP,作为类风湿性关节炎 (RA) 和1型糖尿病 (T1D) 的风险变体.
- 了解非编码变异的功能影响对于阐明自身免疫性疾病的发病因子至关重要.
研究的目的:
- 为了功能性地表征与疾病相关的风险等位基因rs117701653.
- 研究诱导性T细胞辅助刺激器 (ICOS) 在T外围辅助细胞 (Tph) 发育中的作用及其对自身免疫的贡献.
主要方法:
- DNA 拉下测试试剂的测试.
- 质谱测量质量谱测量
- 基因组编辑 基因组编辑
- 表达式定量特征位置 (eQTL) 分析分析.
- 流动细胞计量流动细胞计量
- 细胞因子概况分析
主要成果:
- rs117701653的风险等位基因减少了SMCHD1的结合,从而增强了记忆CD4+T细胞中的ICOS表达.
- 增加ICOS表达与健康捐赠者和RA患者的Tph细胞数量增加相关.
- 风险等位基因促进T细胞分化成产生IL-21和CXCL13的Tph细胞.
结论:
- rs117701653风险等位基因是功能性的,通过调节ICOS表达来促进自身免疫.
- 在致病性Tph细胞的发展和扩张中,ICOS信号发挥着至关重要的作用.
- 这项研究揭示了与人类自身免疫性疾病相关的Tph细胞调节中的一种新的ICOS-依赖性途径.
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