We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A specialized bone marrow microenvironment for fetal haematopoiesis.
- Authors
Liu, Yang; Chen, Qi; Jeong, Hyun-Woo; Koh, Bong Ihn; Watson, Emma C.; Xu, Cong; Stehling, Martin; Zhou, Bin; Adams, Ralf H.
- Abstract
In adult mammalian bone marrow (BM), vascular endothelial cells and perivascular reticular cells control the function of haematopoietic stem and progenitor cells (HSPCs). During fetal development, the mechanisms regulating the de novo haematopoietic cell colonization of BM remain largely unknown. Here, we show that fetal and adult BM exhibit fundamental differences in cellular composition and molecular interactions by single cell RNA sequencing. While fetal femur is largely devoid of leptin receptor-expressing cells, arterial endothelial cells (AECs) provide Wnt ligand to control the initial HSPC expansion. Haematopoietic stem cells and c-Kit+ HSPCs are reduced when Wnt secretion by AECs is genetically blocked. We identify Wnt2 as AEC-derived signal that activates β-catenin-dependent proliferation of fetal HSPCs. Treatment of HSPCs with Wnt2 promotes their proliferation and improves engraftment after transplantation. Our work reveals a fundamental switch in the cellular organization and molecular regulation of BM niches in the embryonic and adult organism. The colonization of bone marrow by haematopoietic stem and progenitor cells is critical for lifelong blood cell formation. Here the authors report distinct features of fetal bone marrow and show that artery-derived signals promote haematopoietic colonization.
- Subjects
BONE marrow; HEMATOPOIETIC stem cells; HEMATOPOIESIS; VASCULAR endothelial cells; BLOOD cells; WNT signal transduction
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-28775-x