整合性单细胞RNA-Seq和ATAC-Seq识别了转录和表观遗传蓝图,指导了骨质结晶的轨迹
Amitabh Das1, Keita Saeki2, Stefania Dell'Orso3
1Division of Periodontology, University of Maryland School of Dentistry, MD, United States.
概括
IRF8是骨质细胞形成的关键负调节剂,维持单细胞的同一性,防止过早的骨质再吸收. 它的缺乏导致染色质的变化,促进骨质细胞形成并影响骨质稳定.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 骨质细胞 (OCs) 对于骨重塑至关重要,但控制它们从单细胞形成的机制尚不清楚.
- 了解骨质细胞生成对于治疗骨疾病至关重要.
研究的目的:
- 在单细胞分辨率下定义骨质细胞分化的转录和表观遗传景观.
- 阐明IRF8在调节骨质细胞形成中的作用.
主要方法:
- 综合性多omics分析:单细胞RNA-seq,scATAC-seq,大量RNA-seq,以及ChIP-seq.
- 使用了野生型和Irf8条件淘汰赛小鼠模型.
主要成果:
- 在单细胞分化成骨质细胞前体过程中识别出明显的转录和表观遗传特征.
- 发现的IRF8作为负调节剂,维持单细胞的同一性并限制OC促进基因的可访问性.
- IRF8缺乏导致染色质重编程,增加OC位点 (Nfatc1,Cebpe) 的可访问性,并减少单细胞基因 (Mafb,Klf4) 的可访问性.
结论:
- IRF8是骨质细胞形成的主负调节剂,对于维持骨质稳定至关重要.
- 这项研究提供了对骨质细胞前体调节的高分辨率见解.
- 研究结果表明,IRF8和相关途径是骨解性疾病的潜在治疗点.
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