PMID- 1636677 OWN - NLM STAT- MEDLINE DCOM- 19920821 LR - 20171213 IS - 0002-9513 (Print) IS - 0002-9513 (Linking) VI - 263 IP - 1 Pt 1 DP - 1992 Jul TI - Regulated expression of monocyte chemoattractant protein-1 in normal human osteoblastic cells. PG - C194-9 AB - An influx of monocytes is observed in many different physiological and pathophysiological states, including bone remodeling and injury. These cells appear at early stages of bone formation and repair and persist throughout the later stages. In experiments described here, unstimulated normal human osteoblastic cells did not produce detectable levels of monocyte chemotactic activity. However, interleukin-1 (IL-1)-stimulated normal human osteoblastic cells produced a chemoattractant that is similar to monocyte chemoattractant protein-1 (MCP-1) at the levels of mRNA expression, protein production, and chemotactic activity. Northern blot analysis indicates that IL-1 elicits a dose-dependent increase in MCP-1 mRNA in normal human osteoblastic cells. Two proteins of M(r) 9,000 and M(r) 13,000 were specifically immunoprecipitated with MCP-1 antiserum from IL-1-stimulated normal human osteoblastic cells. Monocyte chemotactic activity from IL-1-treated cells was blocked by MCP-1 antiserum. These studies establish that normal human osteoblastic cells can be induced to produce monocyte chemoattractants and that this is accounted for by the induced expression of MCP-1. FAU - Williams, S R AU - Williams SR AD - Department of Oral Biology, Boston University Medical Center, Massachusetts 02118. FAU - Jiang, Y AU - Jiang Y FAU - Cochran, D AU - Cochran D FAU - Dorsam, G AU - Dorsam G FAU - Graves, D T AU - Graves DT LA - eng GR - DE-07559/DE/NIDCR NIH HHS/United States GR - DE-08569/DE/NIDCR NIH HHS/United States GR - DE-09581/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Physiol JT - The American journal of physiology JID - 0370511 RN - 0 (Chemokine CCL2) RN - 0 (Chemotactic Factors) RN - 0 (Culture Media) RN - 0 (Interleukin-1) SB - IM MH - Blood Platelets/metabolism MH - Cell Movement/drug effects MH - Cells, Cultured MH - Chemokine CCL2 MH - Chemotactic Factors/blood/*metabolism/pharmacology MH - Culture Media MH - Humans MH - Interleukin-1/pharmacology MH - Macrophages/physiology MH - Monocytes/physiology MH - Osteoblasts/*metabolism/physiology MH - Reference Values EDAT- 1992/07/01 00:00 MHDA- 1992/07/01 00:01 CRDT- 1992/07/01 00:00 PHST- 1992/07/01 00:00 [pubmed] PHST- 1992/07/01 00:01 [medline] PHST- 1992/07/01 00:00 [entrez] AID - 10.1152/ajpcell.1992.263.1.C194 [doi] PST - ppublish SO - Am J Physiol. 1992 Jul;263(1 Pt 1):C194-9. doi: 10.1152/ajpcell.1992.263.1.C194.