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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Concomitant expression of epithelial-mesenchymal transition biomarkers in breast ductal carcinoma: Association with progression

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Autor(es):
Logullo, Angela Flavia [1] ; Nonogaki, Suely [2] ; Pasini, Fatima Solange [3] ; Bueno De Toledo Osorio, Cynthia Aparecida [4] ; Soares, Fernando Augusto [4] ; Brentani, M. Mitzi [3]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Dept Patol, Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Adolfo Lutz, Dept Patol, BR-01246903 Sao Paulo - Brazil
[3] Univ Sao Paulo, Disciplina Oncol LIM24, Dept Radiol, Fac Med, BR-01246903 Sao Paulo - Brazil
[4] Hosp AC Camargo Fund Antonio Prudente, Dept Patol, Sao Paulo - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: ONCOLOGY REPORTS; v. 23, n. 2, p. 313-320, FEB 2010.
Citações Web of Science: 45
Resumo

Epithelial to mesenchymal transition (EMT) is a process implicated in cancer progression in which the underlying cellular changes have been identified mainly using in vitro models. We determined the expression of some putative EMT biomarkers including E-cadherin, beta-catenin, zinc finger factor Snail (Snail), transforming growth factor beta 1 (TGF beta 1), TGF beta type II receptor (TBRII) and the HGF receptor (c-met) and their possible correlation to progression and overall survival in a series of breast ductal carcinoma in situ (DCIS) and invasive ductal carcinomas (IDC). Biomarkers were immunohistochemically determined in 55 IDC specimens from which 21 had lymph node metastases and in 95 DCIS specimens, 46 of these cases associated to invasive carcinoma, in a tissue microarray (TMA). Positive cytoplasmic staining of TGF beta 1 (78.2%), c-met (43.6%), Snail (34.5%), TBRII (100%), membranous E-cadherin (74.5%) and membranous/cytoplasmic beta-catenin (71%) were detected in the IDC samples. Metastatic lymph node samples displayed similar frequencies. A significant increase of c-met and TGF beta 1 positivity along DCIS to IDC progression was noted but only TGF beta 1 positivity was associated with presence of lymph node metastases and advanced stages in IDC. The evaluation of the other EMT markers in DCIS did not show differences in positivity rate as compared to invasive carcinomas. DCIS either pure or associated to IDC showed similar expression of the analyzed biomarkers. All the carcinomas exhibited positive expression of TBRII. Associations between the markers, determined by Spearman's correlation coefficient, showed a significant association between TGF beta 1 and respectively E-cadherin, beta-catenin and cmet in DCIS cases, but in invasive carcinomas only cadherin and catenin were positively correlated. Kaplan-Meier survival curves revealed that none of the EMT biomarkers analyzed were correlated with survival, which was significantly determined only by clinical and hormone receptor parameters. (AU)

Processo FAPESP: 04/04607-8 - Sinalização heterotípica entre células epiteliais tumorais e fibroblastos no carcinoma de mama
Beneficiário:Maria Mitzi Brentani
Linha de fomento: Auxílio à Pesquisa - Temático