PMID- 8078302 OWN - NLM STAT- MEDLINE DCOM- 19940930 LR - 20071114 IS - 0023-6837 (Print) IS - 0023-6837 (Linking) VI - 71 IP - 2 DP - 1994 Aug TI - Expression of monocyte chemoattractant protein-1 in delayed type hypersensitivity reactions in the skin. PG - 226-35 AB - BACKGROUND: Monocyte chemoattractant Protein-1 (MCP-1) is a potent chemotactic factor for monocytes. Because many inflammatory dermatoses are characterized by mononuclear cell infiltrates, it is reasonable to postulate that MCP-1 might be involved in their pathogenesis. To date, no in vivo studies have been published concerning the expression of MCP-1 in this context. The aim of this study was to elucidate the expression of MCP-1 in human inflammatory skin diseases which are thought to involve delayed type hypersensitivity reactions. EXPERIMENTAL DESIGN: Expression of MCP-1 was examined in normal skin and three classes of inflammatory skin reactions by immunohistochemistry experiments utilizing a monospecific MCP-1 antiserum. The distribution of monocytes/macrophages and T lymphocytes was determined by immunohistochemistry using antibodies to specific cell surface markers. RESULTS: Immunostaining with MCP-1 antiserum demonstrated strong MCP-1 expression in lichenoid dermatitis, dermal hypersensitivity reactions, and spongiotic dermatitis. In contrast, normal skin showed minimal MCP-1 expression in the dermis. The cell types displaying MCP-1 expression were endothelial cells of dermal microvessels that were surrounded by lymphocytic infiltrates and monocytes/macrophages at the periphery of the perivascular infiltrates. Occasionally, MCP-1-positive mononuclear cells were present both in the infiltrates and in a diffuse pattern in the surrounding dermis. Keratinocytes were found to produce MCP-1 constitutively in normal skin and in inflamed conditions. The pattern of MCP-1 expression was similar to the pattern observed for monocyte/macrophage distribution, whereas the pattern of MCP-1 expression was different from the pattern of T lymphocyte distribution. CONCLUSIONS: We observed an enhanced expression of MCP-1 in inflammatory skin conditions. The expression of MCP-1 provides a mechanistic explanation for the increased recruitment of monocytes/macrophages in cell-mediated immune response such as delayed type hypersensitivity reactions in the skin. FAU - Yu, X AU - Yu X AD - Department of Oral Biology, Boston University School of Graduate Dentistry, Massachusetts. FAU - Barnhill, R L AU - Barnhill RL 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 - Lab Invest JT - Laboratory investigation; a journal of technical methods and pathology JID - 0376617 RN - 0 (Chemokine CCL2) RN - 0 (Chemotactic Factors) RN - 0 (Cytokines) SB - IM MH - Chemokine CCL2 MH - Chemotactic Factors/*metabolism MH - Cytokines/metabolism MH - Dermatitis/metabolism MH - Epidermis/metabolism MH - Humans MH - Hypersensitivity, Delayed/*metabolism MH - Phagocytes/metabolism MH - Reference Values MH - Skin/*immunology/*metabolism MH - T-Lymphocytes/metabolism EDAT- 1994/08/01 00:00 MHDA- 1994/08/01 00:01 CRDT- 1994/08/01 00:00 PHST- 1994/08/01 00:00 [pubmed] PHST- 1994/08/01 00:01 [medline] PHST- 1994/08/01 00:00 [entrez] PST - ppublish SO - Lab Invest. 1994 Aug;71(2):226-35.