Journal
CELLULAR AND MOLECULAR LIFE SCIENCES
Volume 66, Issue 2, Pages 236-253Publisher
SPRINGER BASEL AG
DOI: 10.1007/s00018-008-8429-z
Keywords
Adipocyte; bone; bone morphogenic proteins; differentiation; mesenchymal stem cell; osteoblast; peroxisome proliferator-activated receptor-gamma
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Funding
- Canadian Institutes of Health Research
- Nova Scotia Health Research Foundation
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Bone marrow mesenchymal stem cells (MSCs) are multipotent cells, which among other cell lineages, give rise to adipocytes and osteoblasts. Within the bone marrow, the differentiation of MSCs into adipocytes or osteoblasts is competitively balanced; mechanisms that promote one cell fate actively suppress mechanisms that induce the alternative lineage. This occurs through the cross talk between complex signaling pathways including those derived from bone morphogenic proteins (BMPs), winglesstype MMTV integration site (Wnt) proteins, hedgehogs, delta/jagged proteins, fibroblastic growth factors (FGF), insulin, insulin-like growth factors (IGF), and transcriptional regulators of adipocyte and osteoblast differentiation including peroxisome proliferator-activated receptor-gamma (PPAR gamma) and runt-related transcription factor 2 (Runx2). Here, we discuss the molecular regulation of bone marrow adipogenesis with emphasis on signals that interact with osteoblastogenic pathways and highlight the possible therapeutic implications of these interactions.
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