Tgf-beta 1 expression as a biomarker of poor prognosis in prostate cancer

Autor(es):Mostrar menos -

dos Reis, Sabrina Thalita ^{[1, 2]} ; Pontes-Junior, Jose ^{[1, 2]} ; Antunes, Alberto Azoubel ^{[1, 2]} ; de Sousa-Canavez, Juliana Moreira ^[3] ; Abe, Daniel Kanda ^[2] ; Shiomi da Cruz, Jose Arnaldo ^[1] ; Dall'Oglio, Marcos Francisco ^[2] ; Crippa, Alexandre ^[2] ; Passerotti, Carlo Camargo ^[1] ; Ribeiro-Filho, Leopoldo A. ^[1] ; Viana, Nayara Izabel ^[1] ; Srougi, Miguel ^[1] ; Moreira Leite, Katia Ramos ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med, Dept Urol, Lab Med Invest LIM55, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Fac Med, Dept Urol, Urooncol Grp, Sao Paulo - Brazil

^[3] Genoa Biotechnol SA, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Clinics; v. 66, n. 7, p. 1143-1147, 2011.
• Citações Web of Science: 29

Resumo

OBJECTIVE: To evaluate the correlation between transforming growth factor beta (TGF-beta 1) expression and prognosis in prostate cancer. PATIENTS AND METHODS: TGF-beta 1 expression levels were analyzed using the quantitative real-time polymerase chain reaction to amplify RNA that had been isolated from fresh-frozen malignant and benign tissue specimens collected from 89 patients who had clinically localized prostate cancer and had been treated with radical prostatectomy. The control group consisted of 11 patients with benign prostate hyperplasia. The expression levels of TGF-beta 1 were compared between the groups in terms of Gleason scores, pathological staging, and prostate-specific antigen serum levels. RESULTS: In the majority of the tumor samples, TGF-beta 1 was underexpressed 67.0% of PCa patients. The same expression pattern was identified in benign tissues of patients with prostate cancer. Although most cases exhibited underexpression of TGF-beta 1, a higher expression level was found in patients with Gleason scores >= 7 when compared to patients with Gleason scores <7 (p = 0.002). Among the 26 cases of TGF-beta 1 overexpression, 92.3% had poor prognostic features. CONCLUSIONS: TGF-beta 1 was underexpressed in prostate cancers; however, higher expression was observed in tumors with higher Gleason scores, which suggests that TGF-beta 1 expression may be a useful prognostic marker for prostate cancer. Further studies of clinical specimens are needed to clarify the role of TGF-beta 1 in prostate carcinogenesis. (AU)

• Processo FAPESP: 09/50368-9 - Análise da expressão das metaloproteinases da matriz -2 e -9, e de seus reguladores MT1-MMP, TIMP-1, TIMP-2, RECK, TGF-beta e interleucina-8 por PCR quantitativo em tempo real em câncer de próstata e bexiga
• Beneficiário: Kátia Ramos Moreira Leite
• Modalidade de apoio: Auxílio à Pesquisa - Regular