Abstract
THE protein CD43 (also known as sialophorin, leukosialin, large sialoglycoprotein or gp115) is expressed on the surface of T lymphocytes, monocytes, neutrophils, platelets and some B lymphocytes. Expression of CD43 is deficient and/or defective in the X-chromosome-linked immunodeficiency disorder Wiscott-Aldrich syndrome, suggesting that CD43 might have a role in T-cell activation. We have shown that expression of human CD43 in an HLA-DR-specific murine T-cell hybridoma enhances the antigen-specific response to stimulation by the human lymphoblastoid cell line Daudi, and that Daudi cells bind specifically to purified immobilized CD43. These data indicate that the specific interaction of CD43 with a ligand on the surface of Daudi cells might contribute to T-cell activation. Here we report evidence that intercellular adhesion molecule-1 (ICAM-1, or CD54), is a ligand for CD43.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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Antigens, CD*
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Antigens, Differentiation, T-Lymphocyte / physiology
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CD2 Antigens
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Cell Adhesion / drug effects
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Cell Adhesion / immunology
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Cell Adhesion Molecules / metabolism*
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Fluorescent Antibody Technique
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Gene Expression Regulation
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HLA-DR Antigens / biosynthesis
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Humans
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Hybridomas / metabolism
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Intercellular Adhesion Molecule-1
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Leukosialin
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Ligands
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Lymphocyte Activation / immunology
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Lymphocyte Function-Associated Antigen-1 / biosynthesis
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Mice
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Receptors, Immunologic / physiology
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Sialoglycoproteins / deficiency
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Sialoglycoproteins / genetics*
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Wiskott-Aldrich Syndrome / immunology*
Substances
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Antigens, CD
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Antigens, Differentiation, T-Lymphocyte
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CD2 Antigens
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Cell Adhesion Molecules
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HLA-DR Antigens
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Leukosialin
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Ligands
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Lymphocyte Function-Associated Antigen-1
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Receptors, Immunologic
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SPN protein, human
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Sialoglycoproteins
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Spn protein, mouse
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Intercellular Adhesion Molecule-1