Miura, Y.Gao, Z.Miura, M.Seo, B.Sonoyama, W.Chen, W.Gronthos, S.Zhang, L.Shi, S.2011-09-062011-09-062006Stem Cells, 2006; 24(11):2428-24361066-50991549-4918http://hdl.handle.net/2440/65982Bone marrow-derived mesenchymal stem cells (BMMSCs) are multipotent postnatal stem cells that have been used for the treatment of bone defects and graft-versus-host diseases in clinics. In this study, we found that subcutaneously transplanted human BMMSCs are capable of organizing hematopoietic progenitors of recipient origin. These hematopoietic cells expressed multiple lineages of hematopoietic cell associated markers and were able to rescue lethally irradiated mice, with successful engraftment in the recipient, suggesting a potential bone marrow (BM) resource for stem cell therapies. Furthermore, we found that platelet-derived growth factor (PDGF) promotes the formation of BMMSC-generated BM niches through upregulation of β-catenin, implying that the PDGF pathway contributes to the formation of ectopic BM. These results indicate that the BMMSC-organized BM niche system represents a unique hematopoietic progenitor resource possessing potential clinical value.enCopyright © 2006 AlphaMed PressMesenchymal stem cellHematopoietic stem cellPlatelet-derived growth factorBone marrow organ systemJournal article002010228110.1634/stemcells.2006-00890002418936000122-s2.0-3375057185032604Gronthos, S. [0000-0002-6225-3084]