造血干细胞
DNMT1 plays a critical role in Hematopoietic stem cell (HSC) maintenance. HSCs with reduced DNMT1 fail to self-renew efficiently post-transplantation. It has also been shown to be critical for other stem cell types such as Intestinal stem cells (ISCs) and Mammary stem cells (MaSCs). Conditional deletion of DNMT1 results in overall intestinal hypomethylation, crypt expansion and altered differentiation timing of ISCs, and proliferation and maintenance of MaSCs.