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Type: Artigo de periódico
Title: Protein Expression Of C-erbb-2 And P53 In Normal Ducts, Ductal Carcinoma In Situ And Invasive Carcinoma Of The Same Breast.
Author: Menezes, Marcus Vinicius Martins de
Cestari, Anna Letícia Oliveira
Almeida, Orlando
Alvarenga, Marcelo
Pinto, Glauce Aparecida
Gurgel, Maria Salete Costa
Souza, Gustavo Antônio de
Zeferino, Luiz Carlos
Abstract: Breast cancer is thought to derive from progressively aberrant, non-invasive breast lesions, but it is not known exactly how invasive breast cancer develops from these lesions. The aim of this study was to verify the changes in c-erbB-2 and p53 protein expression between non-neoplastic ducts, ductal carcinoma in situ and invasive ductal carcinoma found in the same breast. This was a cross-sectional study at Centro de Atenção Integral à Saúde da Mulher, Campinas, Brazil. Fifty-six women with invasive ductal carcinoma and ductal carcinoma in situ in the same breast were included. The expression of c-erbB-2 and p53 proteins was assessed in non-neoplastic and neoplastic cells using immunohistochemical techniques. The c-erbB-2 protein was absent in non-neoplastic ducts but was present in 46% and 36% of in situ and invasive carcinoma components, respectively. Only 2% of non-neoplastic ducts, and 18% and 16% of ductal carcinoma in situ and invasive carcinoma components, respectively, were positive for p53 protein. No significant difference in c-erbB-2 and p53 protein expression was observed between in situ and invasive components. The nuclear grade agreement between in situ and invasive carcinoma was very good. The invasiveness of ductal carcinoma in situ seems to be independent of the Her-2/neu and TP53 genes. The general features of an occurrence of breast carcinoma are formulated at the outset of carcinogenesis, and the Her-2/neu and TP53 genes are involved.
Subject: Breast
Breast Neoplasms
Carcinoma In Situ
Carcinoma, Ductal, Breast
Cross-sectional Studies
Neoplasm Invasiveness
Odds Ratio
Receptor, Erbb-2
Tumor Suppressor Protein P53
Citation: São Paulo Medical Journal = Revista Paulista De Medicina. v. 124, n. 3, p. 121-4, 2006-May.
Rights: aberto
Identifier DOI: 
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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