p53 as a prognostic factor in adrenocortical tumors of adults and children
Braz. j. med. biol. res
;
36(1): 23-27, Jan. 2003. tab
Artículo
en Inglés
| LILACS
| ID: lil-326308
RESUMO
Mutations of the tumor suppressor gene p53 have been considered to be important determinants in several kinds of human cancer. Accumulation of p53 protein has been reported to correlate with more aggressive clinical behavior in some neoplasms. The role of p53 expression in adrenal cortical tumors (ACT) has not been elucidated but some studies have suggested its correlation with malignant behavior. Our objective was to determine if there is a correlation between the expression of immunoreactive p53 and the biological behavior of ACT. Fifty-seven ACT (21 from children and 36 from adults) were evaluated for p53 expression by immunohistochemistry in formalin-fixed paraffin-embedded tissue and analyzed in terms of outcome. The p53 parameter was utilized semiquantitatively. Tumors were classified as p53 negative when no positivity was observed, or when only few cells showed weak positivity (0/1+) and scored as p53 positive when there was a diffuse and strong nuclear positivity (2+/3+). In children, p53 positivity was associated with clinically malignant ACT and p53 negativity was associated with clinically benign ACT (P = 0.026). In adults' ACT, p53 positivity had an effect on disease-free survival (P<0.001) and also correlated with Weiss score, with a cutoff = 4 (P = 0.04). p53 expression was related to the clinical behavior of ACT in both children and adults and these findings seem to support a role for p53 in ACT progression
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Biomarcadores de Tumor
/
Genes p53
/
Proteína p53 Supresora de Tumor
/
Neoplasias de la Corteza Suprarrenal
Tipo de estudio:
Estudio pronóstico
Límite:
Adolescente
/
Adulto
/
Niño
/
Humanos
Idioma:
Inglés
Revista:
Braz. j. med. biol. res
Asunto de la revista:
Biologia
/
Medicina
Año:
2003
Tipo del documento:
Artículo
/
Documento de proyecto
País de afiliación:
Brasil
Institución/País de afiliación:
Hospital do Câncer/BR
/
Universidade de São Paulo/BR
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