Attrition of X chromosome inactivation in aged hematopoietic stem cells
收藏干细胞与再生医学数据中心2022-02-20 更新2024-03-06 收录
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http://data.iscr.ac.cn/Article?id=6083c6d98323a021f119f22211924b14
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资源简介：
During X chromosome inactivation (XCI), the inactive X chromosome (Xi) is recruited to the nuclear lamina at the periphery of the nucleus. Beside X chromosome (X chr) reactivation resulting in a highly penetrant aging-like hematopoietic malignancy, little is known about XCI in aged hematopoietic stem cells (HSCs) . Here, we demonstrate that LaminA/C defines a distinct repressive nuclear compartment for XCI in young HSCs, and its reduction in aged HSCs correlates with an impairment in the overall control of XCI. Integrated omics analyses reveal higher variation in gene expression, global hypomethylation and significantly increased chromatin accessibility on the X chr in aged HSCs. In summary, our data support the role of LaminA/C in the establishment of a special repressive compartment for XCI in HSCs, which is impaired upon aging.
提供机构：
University of Ulm
创建时间：
2022-02-20
