Coordinated modulation of the fibroblast growth factor dual receptor mechanism during transformation from human colon adenoma to carcinoma.
Int J Cancer
; 82(2): 298-304, 1999 Jul 19.
Article
en En
| MEDLINE
| ID: mdl-10389767
ABSTRACT
Basic fibroblast growth factor (bFGF) is dependent on heparan sulphate for its ability to activate the cell surface signal transducing receptor. We have investigated the FGF dual receptor mechanism in a novel model of the transformation from human colon adenoma to carcinoma in vitro. Reverse transcription-polymerase chain reaction showed that mRNA for FGF receptors 1 and 2 were expressed in both the adenoma and carcinoma cells whereas immunocytochemistry showed that the expression of the FGF R1 was reduced significantly in the carcinoma cells. We have reported previously that the composition and sequence of human colon adenoma and carcinoma heparan sulphate (HS) differ in a defined and specific manner. The functional significance of these changes was assessed by affinity co-electrophoresis, which showed that the affinity of adenoma HS for bFGF was 10-fold greater than that of the carcinoma HS (Kd 220 nM vs. 2493 nM, respectively). In addition, Northern studies of the expression of syndecan 1 and 4 mRNA showed that proteoglycan core protein expression was reduced significantly in the carcinoma cells. These findings were associated with a reduced biological response to bFGF in the carcinoma cells that could be partially reversed by the addition of exogenous heparin, suggesting that both the proteoglycan and signal transducing receptor control the cells' response to bFGF.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Carcinoma
/
Adenoma
/
Regulación Neoplásica de la Expresión Génica
/
Receptores de Factores de Crecimiento de Fibroblastos
/
Proteínas Tirosina Quinasas Receptoras
/
Neoplasias del Colon
/
Factores de Crecimiento de Fibroblastos
/
Heparitina Sulfato
/
Proteínas de Neoplasias
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Int J Cancer
Año:
1999
Tipo del documento:
Article
País de afiliación:
Reino Unido