PMID- 23996571 OWN - NLM STAT- MEDLINE DCOM- 20140723 LR - 20131216 IS - 1097-4644 (Electronic) IS - 0730-2312 (Linking) VI - 115 IP - 2 DP - 2014 Feb TI - Dominant negative MCP-1 blocks human osteoclast differentiation. PG - 303-12 LID - 10.1002/jcb.24663 [doi] AB - Human osteoclasts were differentiated using receptor activator of NFkappaB ligand (RANKL) and macrophage colony stimulating factor (M-CSF) from colony forming unit-granulocyte macrophage (CFU-GM) precursors of the myeloid lineage grown from umbilical cord blood. Gene expression profiling using quantitative polymerase chain reaction (Q-PCR) showed more than 1,000-fold induction of chemokine MCP-1 within 24 h of RANKL treatment. MCP-1 mRNA content exceeds that of other assayed chemokines (CCL1, 3, 4, and 5) at all time points up to day 14 of treatment. MCP-1 induction preceded peak induction of calcium signaling activator calmodulin 1 (CALM1) and transcription factors JUN and FOS, which were at 3 days. Key osteoclast related transcription factors NFATc1 and NFATc2 showed peak induction at 7 days, while marker genes for osteoclast function cathepsin K and tartrate resistance acid phosphatase (TRAP) were maximally induced at 14 days, corresponding with mature osteoclast function. To test whether the early and substantial peak in MCP-1 expression is part of human osteoclast differentiation events, a dominant negative inhibitor of MCP-1 (7ND) was added simultaneously with RANKL and M-CSF, resulting in blockade of CALM1, JUN and NFATc2 induction and strong inhibition of human osteoclast differentiation. These data show that a cascade of gene expression leading to osteoclast differentiation depends on intact early MCP-1 induction and signaling in human osteoclasts. CI - (c) 2013 Wiley Periodicals, Inc. FAU - Morrison, Nigel A AU - Morrison NA AD - School of Medical Science, Griffith University Gold Coast Campus, Parklands Drive, Southport, Queensland, 4215, Australia. FAU - Day, Christopher J AU - Day CJ FAU - Nicholson, Geoff C AU - Nicholson GC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Cell Biochem JT - Journal of cellular biochemistry JID - 8205768 RN - 0 (CCL2 protein, human) RN - 0 (Calmodulin) RN - 0 (Chemokine CCL2) RN - 0 (RANK Ligand) RN - 0 (TNFSF11 protein, human) SB - IM MH - Calmodulin/biosynthesis MH - Cell Differentiation/*genetics MH - Cells, Cultured MH - Chemokine CCL2/genetics/*metabolism MH - Gene Expression Profiling MH - Gene Expression Regulation, Developmental MH - Humans MH - Osteoclasts/*cytology MH - RANK Ligand/genetics MH - Signal Transduction/*genetics MH - Umbilical Cord/cytology OTO - NOTNLM OT - 7ND OT - CALMODULIN OT - CFU-GM OT - CHEMOKINE MCP-1 NFAT OT - HUMAN OSTEOCLAST OT - INHIBITION OT - JUN OT - MYELOID EDAT- 2013/09/03 06:00 MHDA- 2014/07/24 06:00 CRDT- 2013/09/03 06:00 PHST- 2013/08/22 00:00 [received] PHST- 2013/08/27 00:00 [accepted] PHST- 2013/09/03 06:00 [entrez] PHST- 2013/09/03 06:00 [pubmed] PHST- 2014/07/24 06:00 [medline] AID - 10.1002/jcb.24663 [doi] PST - ppublish SO - J Cell Biochem. 2014 Feb;115(2):303-12. doi: 10.1002/jcb.24663.