将候选因果性自身免疫变异与T细胞网络联系起来,使用人类T细胞中基因和表观遗传查
bioRxiv : the preprint server for biology
|October 17, 2024
概括
与自身免疫性疾病相关的遗传变异会影响CD4+ T细胞中的基因调节. 研究人员确定了表达调节变体 (emVars),揭示了影响T细胞增殖和自身免疫疾病风险的机制.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 与自身免疫性疾病相关的遗传变异经常在CD4+T细胞调节区域中发现.
- 这些变异被假设通过改变基因调节来影响疾病风险.
- 然而,很少有变体在功能上得到验证,因为它们对T细胞基因表达或功能的影响.
研究的目的:
- 识别和描述调节CD4+T细胞基因表达的遗传变异.
- 调查这些变异对T细胞基因调节和功能的功能影响.
- 阐明遗传变异导致自身免疫性疾病风险的机制.
主要方法:
- 使用大规模并行报告员测定,选超过18,000种与自身免疫性疾病相关的变异体,以检测人类CD4+T细胞中等位基因特异性表达.
- 使用批量和单细胞CRISPR干扰幕来验证已识别变异的调节功能.
- 分析与已识别的表达调节变异相关的丰富基因网络.
主要成果:
- 确定了545种表达调节变体 (emVars),这些变体对可能的因果变体具有显著的丰富性.
- 证明了许多emVars是由常见的上游通路调节的.
- 发现T细胞emVars的目标基因在淋巴细胞激活网络中得到丰富.
- 证实含有emVars的T细胞cis调节元件能调节控制T细胞增殖的已知和新型基因.
结论:
- CD4+ T 细胞中的表达调节变异提供了对自身免疫性疾病病原体的洞察.
- 这些变异影响T细胞基因调节和增殖,为改变自身免疫性疾病风险提供了可信的机制.
- 该研究确定了与自身免疫性疾病相关的T细胞功能相关的新型调节元素和向基因.
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