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Bone and Stem Cells. Bone marrow microenvironment niches for hematopoietic stem and progenitor cells. Nagasawa Takashi 1 1Department of Immunobiology and Hematology, Institute for Frontier Medical Sciences, Kyoto University, Japan. pp.517-526
Published Date 2014/3/28
DOI https://doi.org/10.20837/4201404055
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 In bone marrow, the special microenvironments known as niches control proliferation and differentiation of hematopoietic stem and progenitor cells(HSPCs).However, the identity and functions of the niches has been a subject of longstanding debate. Although it has been reported previously that osteoblasts lining the bone surface act as HSC niches, their precise role in HSC maintenance remains unclear. On the other hand, the adipo-osteogenic progenitors with long processes, termed CXCL12-abundant reticular(CAR)cells, which preferentially express the chemokine CXCL12, stem cell factor(SCF),leptin receptor and PDGF receptor-β were identified in the bone marrow. Recent studies revealed that endothelial cells of bone marrow vascular sinuses and CAR cells provided niches for HSCs. The identity and functions of various other candidate HSC niche cells, including nestin-expressing cells and Schwann cells would also be discussed in this review.



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電子版ISSN 印刷版ISSN 0917-5857 医薬ジャーナル社

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