RT Journal Article ID 0ec4004d51cfb70c A1 Soltanoff, Carrie S. A1 Yang, Shuying A1 Chen, Wei A1 Li, Yi-Ping T1 Signaling Networks that Control the Lineage Commitment and Differentiation of Bone Cells JF Critical Reviews™ in Eukaryotic Gene Expression JO CRE YR 2009 FD 2009-01-20 VO 19 IS 1 SP 1 OP 46 AB Osteoblasts and osteoclasts are the two major bone cells involved in the bone remodeling process. Osteoblasts are responsible for bone formation while osteoclasts are the bone-resorbing cells. The major event that triggers osteogenesis and bone remodeling is the transition of mesenchymal stem cells into differentiating osteoblast cells and monocyte/macrophage precursors into differentiating osteoclasts. Imbalance in differentiation and function of these two cell types will result in skeletal diseases such as osteoporosis, Paget's disease, rheumatoid arthritis, osteopetrosis, periodontal disease, and bone cancer metastases. Osteoblast and osteoclast commitment and differentiation are controlled by complex activities involving signal transduction and transcriptional regulation of gene expression. Recent advances in molecular and genetic studies using gene targeting in mice enable a better understanding of the multiple factors and signaling networks that control the differentiation process at a molecular level. This review summarizes recent advances in studies of signaling transduction pathways and transcriptional regulation of osteoblast and osteoclast cell lineage commitment and differentiation. Understanding the signaling networks that control the commitment and differentiation of bone cells will not only expand our basic understanding of the molecular mechanisms of skeletal development but will also aid our ability to develop therapeutic means of intervention in skeletal diseases. PB Begell House LK https://www.dl.begellhouse.com/journals/6dbf508d3b17c437,43a8c8c0009cc692,0ec4004d51cfb70c.html