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- W4255992029 abstract "The predictive role in terms of pathological response and prognostic role of biomarkers such as GST-π, p53, bcl-2 and bax expression, immuno-histochemically detected, and of the S-phase cell fraction, autoradiographically determined as thymidine labeling index (TLI), were investigated within a prospective randomized phase III clinical trial on squamous-cell carcinoma of the oral cavity, including surgery or primary chemotherapy (PCT), which foresaw the prospective determination of biological markers. Pathological response was defined as the achievement after PCT of a pathological complete remission or the presence of microresidual disease. The study was performed on tumors obtained from a series of 100 previously untreated patients with resectable T2–4N0–2M0 carcinoma. All biomarkers were unrelated, except for an inverse relation between TLI and GST-π and a direct relation between bcl-2 and bax expression. In patients treated with surgery alone, 3-year disease-free survival (DFS) appeared to be weakly, but not significantly, related only to GST-π and p53 expression. In patients treated with PCT, pathological response and DFS were independent of p53 expression and cell proliferation. Conversely, low GST-π and bax expression were indicative of pathological response but lost relevance as predictors of DFS, whereas absence of bcl-2 was associated with high probability of 3-year DFS in the overall series as well as in non-responding patients. Within this latter sub-set, all patients with bcl-2-positive tumors relapsed within 1 year of surgery, whereas a 60% probability of 3-year DFS was observed for patients with bcl-2-negative tumors (p= 0.02). This interim analysis appears to indicate that some biofunctional markers can provide information on pathological response to PCT and could help in understanding treatment efficacy at a cellular level. Int. J. Cancer (Pred. Oncol.) 79:619–623, 1998. © 1998 Wiley-Liss, Inc." @default.
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- W4255992029 date "1998-12-18" @default.
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- W4255992029 title "Biological markers as indicators of pathological response to primary chemotherapy in oral‐cavity cancers" @default.
- W4255992029 doi "https://doi.org/10.1002/(sici)1097-0215(19981218)79:6<619::aid-ijc11>3.3.co;2-1" @default.
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