Cross-linking of membrane CD43 mediates dendritic cell maturation

J Immunol. 1999 Jun 1;162(11):6331-6.

Abstract

CD43/leukosialin is a major sialoglycoprotein of the dendritic cell (DC) surface, which can regulate cell adhesion and has the potential to mediate cell activation signals. Monocyte-derived DC transiently incubated with the anti-CD43 mAb, MEM-59, or with F(ab')2 fragments, but not with monovalent Fab fragments or control IgG, 24 h later showed increased levels of membrane HLA-DR, CD54, CD40, CD80, CD86, and CD83. In parallel, CD43 cross-linking induced synthesis and release of IL-1beta, IL-6, TNF-alpha, IL-12, and IL-10. CD43 ligation inhibited the endocytic activity of DC, and enhanced the capacity of DC to stimulate T cell proliferation in the primary allogeneic and autologous MLR assay. In addition, anti-CD43-treated DC were less efficient at presenting native HIV-1 reverse transcriptase to a specific CD4+ T cell clone, whereas presentation of the reverse transcriptase 55-72 peptide to the same clone was increased. Finally, MEM-59 or its F(ab')2 fragments elicited a rise in intracellular free calcium and tyrosine phosphorylation of a 25-kDa protein in DC. The results thus indicate that CD43 cross-linking with specific ligands induces activation and functional maturation of DC.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antibodies, Monoclonal / pharmacology
  • Antigens, CD*
  • Antigens, Surface / biosynthesis
  • Calcium / metabolism
  • Cell Differentiation / immunology
  • Cell Membrane / immunology
  • Cell Membrane / metabolism
  • Cytokines / biosynthesis
  • Dendritic Cells / cytology
  • Dendritic Cells / immunology*
  • Dendritic Cells / metabolism*
  • Endocytosis / immunology
  • Humans
  • Intracellular Fluid / metabolism
  • Leukosialin
  • Ligands
  • Lymphocyte Activation / immunology
  • Membrane Glycoproteins / immunology*
  • Membrane Glycoproteins / metabolism*
  • Phosphorylation
  • Sialoglycoproteins / immunology*
  • Sialoglycoproteins / metabolism*
  • T-Lymphocytes / immunology
  • Tyrosine / metabolism

Substances

  • Antibodies, Monoclonal
  • Antigens, CD
  • Antigens, Surface
  • Cytokines
  • Leukosialin
  • Ligands
  • Membrane Glycoproteins
  • SPN protein, human
  • Sialoglycoproteins
  • Tyrosine
  • Calcium