Integrin expression in human melanoma cell lines: heterogeneity of vitronectin receptor composition and function.
Int J Cancer
; 49(6): 924-31, 1991 Dec 02.
Article
en En
| MEDLINE
| ID: mdl-1720426
Ten human melanoma cell lines were examined for integrin-receptor expression using a panel of antibodies directed against different integrin subunits. Considerable heterogeneity was detected for levels of expression of 7 integrins, including the alpha v beta 3 vitronectin receptor where a correlation between tumorigenic capacity in athymic nude mice and alpha v beta 3 levels was found. Detailed analysis of the vitronectin receptor on these lines revealed heterogeneity of composition. In one cell line, VUP, an alpha v beta 1 association was detected and, by antibody-inhibition studies, this receptor was shown to bind vitronectin as its ligand. In another line, DX3, evidence was obtained which indicated that apart from the alpha v beta 3 receptor the alpha v was able to associate with another beta subunit which was not beta 3. The existence of these alternative forms of the vitronectin receptor in this small sample of tumours of common origin might explain why the capacity to bind to fibrinogen and vitronectin substrates by these cells did not necessarily correlate with alpha v beta 3 levels.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Receptores Inmunológicos
/
Integrinas
/
Melanoma
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Int J Cancer
Año:
1991
Tipo del documento:
Article
Pais de publicación:
Estados Unidos