免疫表型中的基于祖先的差异与狼活动有关
Samantha Slight-Webb1, Kevin Thomas1,2, Miles Smith1
1Department of Arthritis and Clinical Immunology, Oklahoma Medical Research Foundation (OMRF), Oklahoma City, Oklahoma, USA.
JCI insight
|August 22, 2023
概括
系统性红斑狼 (SLE) 不成比例地影响黑人女性,在黑人和白人患者之间观察到明显的免疫系统差异. 这些与祖先相关的免疫变化可能解释SLE严重程度和进展差异.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 系统性红斑狼研究研究
背景情况:
- 系统性红斑狼 (SLE) 不成比例地影响黑人女性,比白人女性更早发病,严重程度增加,死亡率更高.
- 现有研究表明,种族群体之间的SLE结果存在显著的健康差异,需要对潜在的生物机制有更深入的了解.
研究的目的:
- 在黑人和白人患有SLE的患者和健康对照人群中使用多组学方法调查与祖先相关的免疫系统变化.
- 识别导致SLE差异的特定免疫细胞表型,表观遗传修饰和分子信号通路.
主要方法:
- 采用了多组学策略,包括质量细胞计,单细胞转录组学和蛋白质组学,以及血细胞因子分析.
- 评估SLE患者的免疫细胞和血中的细胞组成,信号传导,表观遗传学 (H3K27ac) 和蛋白质学,以及由祖先分层的健康对照.
- 利用托尔类受体 (TLR) 刺激试验来验证观察到的免疫反应.
主要成果:
- 观察到明显的免疫细胞变化,包括 CD8+ T 细胞,B 细胞,单细胞和树突细胞 (DC) 的增强活性,黑人患者有活跃的SLE.
- 在CD8+T细胞中确定了特定的表观遗传修饰 (H3K27ac),这些修饰与疾病活性相关,并区分黑人和白人患者.
- 在黑人患有SLE患者的免疫细胞中发现TLR基因表达升高和TLR/IFN-α信号通路升高,甚至在健康的黑人对照中与白人相比.
结论:
- 在SLE中定义了祖先相关的免疫表型,突出了黑人和白人患者之间的免疫细胞活性,表观遗传学和信号通路的差异.
- 这些免疫变异可能有助于生物学观察到SLE严重程度,进展和结果的差异.
- 这些发现为了解SLE异质性和制定有针对性的治疗策略提供了多种资源.
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