T lymphocyte adhesion to human synovial fibroblasts. Role of cytokines and the interaction between intercellular adhesion molecule 1 and CD11a/CD18.
We studied the adhesion of human peripheral blood T lymphocytes to human synovial fibroblasts stimulated with interferon-gamma (IFN gamma), tumor necrosis factor alpha (TNF alpha), interleukin-1 beta (IL-1 beta), or combinations of these cytokines. T lymphocytes bound poorly to untreated human synovial fibroblasts. IFN gamma treatment resulted in the largest increase in adhesion, followed by TNF alpha and IL-1 beta. Combinations of IFN gamma + TNF alpha and IFN gamma + IL-1 beta had a synergistic effect on intercellular adhesion molecule 1 (ICAM-1) expression and adhesion. The increase in cellular adhesion induced by cytokines correlated with the up-regulation of the number of cells expressing ICAM-1 and the density of antigen/cell. There was no synergistic effect on leukocyte function-associated antigen 3 (LFA-3) or on HLA class I or class II antigen expression. Adhesion was only partially inhibited by anti-ICAM-1, anti-LFA-1, or anti-CD18. These findings suggest the existence of ICAM-1--independent and CD11/CD18-independent adhesion mechanisms. Anti-LFA-3 was completely ineffective as an inhibitor of adhesion. There was no additive or synergistic advantage of using combinations of antibodies to increase the level of inhibition, i.e., anti--ICAM-1 + anti-LFA-3, anti-ICAM-1 + anti-CD18, or anti-ICAM-1 + anti-LFA-1 (CD11a). Our data indicate that proinflammatory cytokines may play a prominent role in the formation and exacerbation of synovial hyperplasia, by regulating the recruitment and retention of T lymphocytes via the up-regulation of adhesion molecules on synovial fibroblasts.
Krzesicki
R F
RF
Department of Hypersensitivity Diseases Research, Upjohn Company, Kalamazoo, Michigan 49001.
Fleming
W E
WE
Winterrowd
G E
GE
Hatfield
C A
CA
Sanders
M E
ME
Chin
J E
JE
D000906:Antibodies / Q000276:immunology; D015703:Antigens, CD / Q000276:immunology / Q000378:metabolism*; D018821:CD18 Antigens; D002448:Cell Adhesion / Q000276:immunology*; D015815:Cell Adhesion Molecules / Q000276:immunology; D002478:Cells, Cultured; D016207:Cytokines / Q000276:immunology* / Q000494:pharmacology; D005347:Fibroblasts / Q000276:immunology*; D005434:Flow Cytometry; D006801:Humans; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma / Q000494:pharmacology; D007375:Interleukin-1 / Q000494:pharmacology; D016169:Lymphocyte Function-Associated Antigen-1 / Q000276:immunology; D016028:Receptors, Leukocyte-Adhesion / Q000276:immunology*; D013583:Synovial Membrane / Q000276:immunology*; D013585:Synovitis / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D015854:Up-Regulation / Q000276:immunology
D000906:Antibodies; D015703:Antigens, CD; D018821:CD18 Antigens; D015815:Cell Adhesion Molecules; D016207:Cytokines; D007375:Interleukin-1; D016169:Lymphocyte Function-Associated Antigen-1; D016028:Receptors, Leukocyte-Adhesion; D014409:Tumor Necrosis Factor-alpha; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma