Novel osteoclast signaling mechanisms.

作者: Masahiro Shinohara , Hiroshi Takayanagi

DOI: 10.1007/S11914-007-0005-1

关键词: Calcium signalingReceptorImmunoreceptor tyrosine-based activation motifNFATNFATC Transcription FactorsCancer researchChemistryOsteoclastTranscription factorRANKL

摘要: Osteoclasts are cells of monocyte/macrophage origin that degrade bone matrix. Receptor activator NF-κB ligand (RANKL) induces osteoclast differentiation in the presence macrophage colony-stimulating factor. RANKL activates tumor necrosis factor receptor-associated 6, c-Fos, and calcium signaling pathways, all which indispensable for induction activation nuclear activated T (NFAT) c1. NFATc1 is master transcription differentiation, regulates many osteoclast-specific genes. Multiple immunoglobulin-like receptors associated with immunoreceptor tyrosine-based motif (ITAM)-harboring adapters, Fc receptor common γ subunit (FcRγ), DNAX-activating protein (DAP) 12 mediate costimulatory signals RANK, activate through phospholipase Cγ (PLCγ). In addition to calcineurin-NFATc1, CaMK-CREB (calcium/calmodulin kinase-cyclic AMP-response element binding protein) pathway, also plays a critical role osteoclastogenesis. This review summarizes recent advances study mechanisms differentiation.

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