Cloning of an interferon-gamma regulated human melanoma-associated antigen: identity to the intercellular adhesion molecule ICAM-1.
The human melanoma-associated antigen identified by the monoclonal antibody (mAb) Me14-D12 is a cell surface protein whose expression is induced by interferon-gamma (IFN-gamma). We have recently reported the molecular cloning of a genomic probe specific for the gene and mRNA of this protein. By screening with the genomic probe, we have now isolated a full length 3.0 kb cDNA from a Raji cell line-derived lambda-gt10 library. Sequence analysis of this cDNA showed a 99.8% homology with the intercellular adhesion molecule-1 (ICAM-1). Mouse Ltk- cells stably transfected with the human cDNA clone were found to express the ICAM-1 antigenic determinants detected by mAb Me14-D12 and a reference anti-ICAM-1 mAb, as judged by surface immunofluorescence. Immunoprecipitation of surface-iodinated proteins with mAb Me14-D12 revealed the presence of a 90 kD molecule with identical mobility to ICAM-1. In addition, mAb Me14-D12 could inhibit the phorbolester-stimulated aggregation of U937 cells. The findings show that the human melanoma-associated Me14-D12 antigen is the adhesion molecule ICAM-1.
Institute of Biochemisty, University of Lausanne, Switzerland.
D
D
Hayoz
D
D
Rimoldi
L
L
Kühn
J P
JP
Mach
S
S
Carrel
D000911:Antibodies, Monoclonal / Q000276:immunology; D000918:Antibody Specificity; D000951:Antigens, Neoplasm; D001483:Base Sequence; D015815:Cell Adhesion Molecules / Q000096:biosynthesis / Q000235:genetics*; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma / Q000494:pharmacology; D008545:Melanoma / Q000276:immunology*; D058950:Melanoma-Specific Antigens; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000096:biosynthesis / Q000235:genetics*; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D012689:Sequence Homology, Nucleic Acid
D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D015815:Cell Adhesion Molecules; D058950:Melanoma-Specific Antigens; D009363:Neoplasm Proteins; D011993:Recombinant Fusion Proteins; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma; D004247:DNA