PMID- 7891256 OWN - NLM STAT- MEDLINE DCOM- 19950420 LR - 20220330 IS - 0022-3492 (Print) IS - 0022-3492 (Linking) VI - 66 IP - 1 DP - 1995 Jan TI - Fibroblasts, mononuclear phagocytes, and endothelial cells express monocyte chemoattractant protein-1 (MCP-1) in inflamed human gingiva. PG - 80-8 AB - Gingival inflammation is initiated by bacterial colonization of the tooth surface. It is characterized by infiltration of mononuclear cells, a feature of many forms of chronic inflammation. Monocyte chemoattractant protein-1 (MCP-1) is the predominant monocyte chemoattractant secreted by a variety of cells in vitro. We examined MCP-1 expression in chronic gingival inflammation by double antibody immunohistochemistry that utilized rabbit anti-MCP-1 antibody simultaneously with mouse monoclonal antibodies to specific cellular markers. MCP-1 mRNA expression by fibroblasts in inflamed gingival tissues was examined by in situ hybridization. We report here that in human chronic gingival inflammation the principal cell type expressing MCP-1 in dense inflammatory infiltrates is the mononuclear phagocyte. The cells expressing MCP-1 in moderately inflamed areas and in adjacent areas to inflammatory infiltrates are mononuclear phagocytes and fibroblasts, while in areas of fibroblastic hyperplasia, MCP-1 positive cells are predominantly fibroblasts. We also demonstrate that in moderately and highly inflamed areas, the extent of MCP-1 expression is greater than that in adjacent normal/mildly inflamed areas. As the degree of inflammation increased, there is also a concomitant increase in the number of mononuclear phagocytes. Furthermore, it is apparent that most of the infiltrating monocytes/macrophages are positive for MCP-1 in vivo. Our finding that MCP-1 expression is unambiguously identified in fibroblasts suggests that they can play a role in host defense by initiating the recruitment of monocytes. In addition, the expression of chemokines such as MCP-1 may represent a mechanism for amplification of inflammatory signals in gingival inflammation. FAU - Yu, X AU - Yu X AD - Department of Periodontology and Oral Biology, Boston University School of Graduate Dentistry, MA, USA. FAU - Graves, D T AU - Graves DT LA - eng GR - DE07559/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Periodontol JT - Journal of periodontology JID - 8000345 RN - 0 (Antibodies, Monoclonal) RN - 0 (Chemokine CCL2) RN - 0 (Chemotactic Factors) RN - 0 (Cytokines) RN - 0 (DNA, Antisense) RN - 0 (RNA, Messenger) SB - IM MH - Animals MH - Antibodies, Monoclonal MH - Chemokine CCL2 MH - Chemotactic Factors/*biosynthesis/immunology MH - Chemotaxis, Leukocyte MH - Chronic Disease MH - Cytokines/biosynthesis MH - DNA, Antisense MH - Endothelium, Vascular/cytology/metabolism MH - Fibroblasts/immunology/metabolism MH - Gingivitis/*immunology/pathology MH - Humans MH - Immunohistochemistry/methods MH - In Situ Hybridization MH - Macrophages/immunology/metabolism MH - Mice MH - Monocytes/immunology/metabolism MH - RNA, Messenger/analysis MH - Rabbits EDAT- 1995/01/01 00:00 MHDA- 1995/01/01 00:01 CRDT- 1995/01/01 00:00 PHST- 1995/01/01 00:00 [pubmed] PHST- 1995/01/01 00:01 [medline] PHST- 1995/01/01 00:00 [entrez] AID - 10.1902/jop.1995.66.1.80 [doi] PST - ppublish SO - J Periodontol. 1995 Jan;66(1):80-8. doi: 10.1902/jop.1995.66.1.80.