LOCALIZED EXPRESSION OF MESSENGER-RNA FOR PHAGOCYTE-SPECIFIC CHEMOTACTIC CYTOKINES IN HUMAN PERIODONTAL INFECTIONS

被引:161
作者
TONETTI, MS [1 ]
IMBODEN, MA [1 ]
GERBER, L [1 ]
LANG, NP [1 ]
LAISSUE, J [1 ]
MUELLER, C [1 ]
机构
[1] UNIV BERN,SCH MED,INST PATHOL,DEPT IMMUNOPATHOL,BERN,SWITZERLAND
关键词
D O I
10.1128/IAI.62.9.4005-4014.1994
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
In bacterial infections, mononuclear and polymorphonuclear phagocytes are key components of host defenses. Recent investigations have indicated that chemokines are able to recruit and activate phagocytes. In particular, interleukin-8 (IL-8) attracts polymorphonuclear leukocytes (PMNs), while monocyte chemoattractant protein-1 (MCP-1) is selective for cells of the monocyte/macrophage lineage. In this investigation, we analyzed the in situ expression of IL-8 and MCP-1 mRNAs in human periodontal infections. Specific mRNA was detected by in situ hybridization using S-35-labeled riboprobes in frozen tissue sections. Phagocytes (PMNs and macrophages) were specifically detected as elastase positive or CD68(+) cells by a three-stage immunoperoxidase technique. Results indicated that expression of phagocyte-specific cytokines was confined to selected tissue locations and, in general, paralleled phagocyte infiltration. In particular, IL-8 expression was maximal in the junctional epithelium adjacent to the infecting microorganisms; PMN infiltration was more prominent in the same area. MCP-1 was expressed in the chronic inflammatory infiltrate and along the basal layer of the oral epithelium. Cells of the monocyte/macrophage lineage were demonstrated to be present in the same areas. The observed expression pattern may be the most economic way to establish a cell-type-selective chemotactic gradient within the tissue that is able to effectively direct polymorphonuclear phagocyte migration toward the infecting microorganisms and modulate mononuclear phagocyte infiltration in the surrounding tissues. This process may optimize host defenses and contribute to containing leukocyte infiltration to the infected and inflamed area, thus limiting tissue damage.
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页码:4005 / 4014
页数:10
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