The GPIIb-IIIa-like complex may function as a human melanoma cell adhesion receptor for thrombospondin

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · Experimental Cell Research; (United States)

DOI:https://doi.org/10.1016/0014-4827(89)90251-6· OSTI ID:5714695

Tuszynski, G P; Karczewski, J; Smith, L; Murphy, A; Rothman, V L; Knudsen, K A ^[1]

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1. Lankenau Medical Research Center, Philadelphia, PA (United States)

The purpose of this study was to determine whether a heterodimeric complex immunologically related to the fibrinogen receptor could function as a thrombospondin (TSP) receptor in TSP-mediated cell-substratum adhesion of human melanoma cells. The authors found that polyclonal antibodies to the platelet GPIIb-IIIa complex, GPIIIa, and the human vitronectin receptor inhibited TSP-mediated cell adhesion by 63-68%. Immunoprecipitation of detergent extracts of {sup 125}I-surface-labeled melanoma cells using either anti-human platelet GPIIb-IIIa or anti-human vitronectin receptor antibody revealed the presence of a single heterodimeric complexes, suggesting that both antisera recognize the same integrin receptor, GPIIb-IIIa-like antigen. Adhesion of cells to TSP is likely mediated through a region of the TSP molecule containing the arginine-glycine-aspartic (RGD) peptide sequence, since cell attachment to TSP was inhibited 50-66% in the presence of peptides containing RGD. These results strongly suggest that a GPIIb-IIIa-like/vitronectin receptor can serve as a cell binding site for TSP in mediating cell-substratum adhesion.

• OSTI ID: 5714695
• Journal Information: Experimental Cell Research; (United States), Journal Name: Experimental Cell Research; (United States) Vol. 182:2; ISSN ECREA; ISSN 0014-4827
• Country of Publication: United States
• Language: English

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59 BASIC BIOLOGICAL SCIENCES
ADHESION
ANIMAL CELLS
ANIMALS
BETA DECAY RADIOISOTOPES
BLOOD COAGULATION FACTORS
COAGULANTS
DAYS LIVING RADIOISOTOPES
DISEASES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
ELECTROPHORESIS
FIBRINOGEN
GLOBULINS
HEMATOLOGIC AGENTS
HEMOSTATICS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE 125
IODINE ISOTOPES
ISOTOPES
MAMMALS
MAN
MELANOMAS
MEMBRANE PROTEINS
MOLECULAR STRUCTURE
NEOPLASMS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PRIMATES
PROTEINS
RADIOISOTOPES
RECEPTORS
TUMOR CELLS
VERTEBRATES