生物
间充质干细胞
细胞生物学
细胞分化
转分化
脂肪生成
干细胞
Wnt信号通路
多能干细胞
祖细胞
基因
遗传学
信号转导
作者
Shiu‐Ru Lin,Nicole E. Webb,Yingjie Song,Rocky S. Tuan
出处
期刊:Stem Cells
[Wiley]
日期:2006-07-01
卷期号:24 (7): 1707-1718
被引量:182
标识
DOI:10.1634/stemcells.2005-0604
摘要
Adult human mesenchymal stem cells (hMSCs) possess multilineage differentiation potential, and differentiated hMSCs have recently been shown to have the ability to transdifferentiate into other lineages. However, the molecular signature of hMSCs is not well‐known, and the mechanisms regulating their self‐renewal, differentiation, and transdifferentiation are not completely understood. In this study, we demonstrate that fully differentiated hMSCs could dedifferentiate, a likely critical step for transdifferentiation. By comparing the global gene expression profiles of undifferentiated, differentiated, and dedifferentiation cells in three mesenchymal lineages (osteogenesis, chondrogenesis, and adipogenesis), we identified a number of “stemness” and “differentiation” genes that might be essential to maintain adult stem cell multipotency as well as to drive lineage‐specific commitment. These genes include those that encode cell surface molecules, as well as components of signaling pathways. These genes may be valuable for developing methods to isolate, enrich, and purify homogeneous population of hMSCs and/or maintain and propagate hMSCs as well as guide or regulate their differentiation for gene and cell‐based therapy. Using small interfering RNA gene inactivation, we demonstrate that five genes (actin filament‐associated protein, frizzled 7, dickkopf 3, protein tyrosine phosphatase receptor F, and RAB3B) promote cell survival without altering cell proliferation, as well as exhibiting different effects on the commitment of hMSCs into multiple mesenchymal lineages.
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