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Published on: July 17, 2017
Identification of a CD133-CD55- population functions as a fetal common skeletal progenitor
Lihong Weng1,2,3, Xingbin Hu1,4, Bijender Kumar1,2
1Divison of Hematopoietic Stem Cell and Leukemia Research, Gehr Family Center for Leukemia Research, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA.
Abstract:
In this study, we identified a CD105+CD90.1-CD133-CD55- (CD133-CD55-) population in the fetal skeletal element that can generate bone and bone marrow. Besides osteoblasts and chondrocytes, the CD133-CD55- common progenitors can give rise to marrow reticular stromal cells and perivascular mesenchymal progenitors suggesting they function as the fetal common skeletal progenitor. Suppression of CXCL12 and Kitl expression in CD133-CD55- common progenitors severely disrupted the BM niche formation but not bone generation. Thus, CD133-CD55- common progenitors are the main source of CXCL12 and Kitl producing cells in the developing marrow.
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