初级人类T细胞中的遗传和表观遗传查将候选因果性自身免疫变异与T细胞网络联系起来
Ching-Huang Ho1, Maxwell A Dippel1, Meghan S McQuade1
1Benaroya Research Institute, Center for Systems Immunology, Seattle, WA, USA.
Nature genetics
|September 18, 2025
概括
与自身免疫性疾病相关的遗传变异会影响CD4+ T细胞基因调节. 研究人员确定了545种影响T细胞表达的变异 (emVars),揭示了自身免疫性疾病风险的新机制.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学是一种遗传学.
- 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细胞的cis-regulatory区域中发现.
- 这些变异可能通过改变基因调节来影响疾病风险,但很少有人在T细胞中得到了功能验证.
研究的目的:
- 识别具有对原始人类CD4+T细胞基因表达的等位基因特异性影响的遗传变异.
- 研究这些变异对T细胞功能和自身免疫性疾病发病的功能影响.
主要方法:
- 大规模并行记者测试 (MPRA) 用于测试18000多种与自身免疫性疾病相关的变体,以测试CD4+T细胞中异位基因特异性表达调节.
- 批量和单细胞CRISPR干扰 (CRISPRi) 选被用于验证已识别的变异及其向基因的调节效应.
主要成果:
- 确定了545种变异,称为emVars (表达调节变异),这些变异在初级T细胞中以异位特异的方式显著改变基因表达.
- 这些emVars对可能的因果变异进行了丰富,其向基因参与了淋巴细胞激活网络.
- 克里斯皮尔屏幕证实,含有emVar的cis调节元件调节了对T细胞增殖至关重要的基因,包括已知的和新的目标.
结论:
- 有相当数量的自身免疫性疾病相关的遗传变异直接影响CD4+T细胞中的基因表达.
- 这些发现提供了关于遗传变异如何通过影响T细胞功能和调节来促进自身免疫性疾病的机制性见解.
相关概念视频
Autoimmune Disorders
1.5K
Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
Concept and Mechanism of Autoimmune Diseases
The immune...
1.5K
T Cell Activation and Clonal Selection
14.8K
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
14.8K
Genetic Screens
5.6K
Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...
5.6K


