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Flow Cytometric Cell Sorting and In Vitro Pre-Osteoinduction Are Not Requirements for In Vivo Bone Formation by Human Adipose-Derived Stromal Cells
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Flow Cytometric Cell Sorting and In Vitro Pre-Osteoinduction Are Not Requirements for In Vivo Bone Formation by Human Adipose-Derived Stromal Cells
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Journal Article
Flow Cytometric Cell Sorting and In Vitro Pre-Osteoinduction Are Not Requirements for In Vivo Bone Formation by Human Adipose-Derived Stromal Cells
2013
Overview
Human adipose-derived stromal cells (hASCs) are a promising cell source for bone tissue engineering. However, before the clinical application of hASCs for the treatment of bone defects, key questions require answers, including whether pre-osteoinduction (OI) and flow cytometric cell purification are indispensible steps for in vivo bone formation by hASCs. In this study, hASCs were purified by flow cytometric cell sorting (FCCS). The osteogenic capabilities of hASCs and purified hASCs with or without pre-osteoinduction were examined through in vitro and in vivo experiments. We found that pre-OI enhanced the in vitro osteogenic capacity of hASCs. However, 8 weeks after in vivo implantation, there were no significant differences between hASCs and hASCs that had undergone OI (hASCs+OI) or between purified hASCs and purified hASCs+OI (P>0.05). Interestingly, we also found that purified hASCs had an osteogenic potential similar to that of unpurified hASCs in vitro and in vivo. These results suggest that FCCS and in vitro pre-OI are not requirements for in vivo bone formation by hASCs.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
