Abstract
Hematopoietic stem cells (HSCs) have the ability to self-renew, differentiate into various blood cell types, and reside in the bone marrow (BM) niche. Estrogen-related receptor α (ERRα) is an orphan nuclear receptor that has a role in mitochondrial biogenesis and metabolic regulation. Previous research has shown that ERRα contributes to the development of acute myeloid leukemia (AML) by acting as a key regulator of mitochondrial processes, though its role in HSC regulation remains mostly unknown. Flow cytometric analysis determined the population of the hematopoietic stem and progenitor cells (HSPC) using Errα knockout (KO) and conditional KO (cKO) mice. Furthermore, we investigated reconstitution with BM transplantation assay. Here, the ablation of Errα in the BM demonstrated that the production of mature blood cells, lineage distribution within hematopoietic organs, and frequencies of the HSPC populations were similar to those of controls. In addition, the ablation of Errα did not perturb HSC function under the stress of transplantation. Collectively, ERRα is not necessary for the control of HSPC populations, as well as for the maintenance of HSC characteristics and functions within the BM.
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