Vascular endothelial growth factor, p53, Rb, Bcl-2 expression and response to chemotherapy in advanced non-small cell lung cancer

Lung Cancer : Journal of the International Association for the Study of Lung Cancer
Vienna LudoviniMaurizio Tonato

Abstract

Vascular endothelial growth factor (VEGF) increases microvascular permeability and stimulates endothelial cell growth. p53 Overexpression has been associated with resistance to cisplatin-based chemotherapy in patients (pts) with NSCLC. The aim of this study was to evaluate the predictive role of VEGF for chemotherapy response, its relationship with p53, Rb, Bcl-2 and hemoglobin levels and its impact on overall survival in pts with advanced NSCLC. Bronchial or fine-needle biopsy specimens from 85 pts with NSCLC obtained before chemotherapy were analyzed using an immunohistochemical method for VEGF, p53, Rb and Bcl-2. There were 73 males and 12 females with a median age of 62.6 years. The majority of pts (48%) had squamous cell histology. Ten pts had stage IIIA, 25 stage IIIB and 50 stage IV. Thirty six (43%) pts had positive immunostaining for VEGF, 37 (44%) had positive p53, 53 (62%) had negative Rb and 4 (5%) had positive Bcl-2. VEGF was negatively correlated with Rb (r(s) = 0.26; P = 0.015), positively with Bcl-2 (r(s) = 0.22; P = 0.42), whereas no statistically significant correlation with p53, age, stage and histological type was found. In a logistic regression model, adjusting for treatment, VEGF expression was not associa...Continue Reading

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