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IRF8定义了产后微质中的表观遗传景观,从而指导它们的转录组程序

Keita Saeki¹, Richard Pan^2,3, Eunju Lee²

¹Division of Developmental Biology, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA. saekik2@nih.gov.

Nature immunology

|September 23, 2024

概括

干扰素调节因子8 (IRF8) 对微质细胞的发育和认同至关重要. 删除IRF8会导致微质细胞特征的丧失,并加剧老鼠阿尔茨海默氏病的病理.

科学领域:

神经科学是一个神经科学.
免疫学免疫学免疫学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.

背景情况:

微质细胞是大脑的先天免疫细胞.
转录因子IRF8在微质中高度表达,但其在产后发育中的作用尚不清楚.

研究的目的:

研究IRF8在产后微质发育和功能中的作用.
了解IRF8如何影响微质中的表观遗传景观和基因表达.

主要方法:

染色体免疫沉测序 (ChIP-seq) 用于识别IRF8结合部位.
单细胞RNA测序 (scRNA-seq) 和单细胞ATAC-seq (scATAC-seq) 用于多原子分析.
在小鼠模型中IRF8的遗传删除,包括5xFAD阿尔茨海默病模型.

主要成果:

IRF8与发育中的微质中的增强剂结合,与增加的染色质可访问性和微质特异性基因表达相关.
失去IRF8会导致微质标识的丧失,并获得与疾病相关的微质 (DAM) 标志.
IRF8对于建立微质细胞特异性DNA甲基化模式至关重要.
在5xFAD小鼠中,IRF8缺失减少了粉样蛋白-β斑块相互作用,斑块大小和神经元损失.

结论:

IRF8在建立出生后微质基因表达和身份所需的表观遗传景观方面发挥着关键作用.
IRF8是微质成熟和功能的关键调节者,在阿尔茨海默氏症模型中影响神经炎症和神经保护.

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