Vascular Endothelial Growth FactorPolymorphisms −1154 G/A and −460 C/T Are Not Associated withVEGFmRNA Expression and Susceptibility to Sporadic Colon Cancer

Abstract

Vascular endothelial growth factor (VEGF) is important mediator of angiogenesis, and its expression in colorectal tumors is related to tumor progression. VEGF expression has been detected in normal mucosa, primary colon cancers, and metastatic tumors, and patients with low VEGF expression have a better survival rate. In addition, anti-VEGF monoclonal antibody improves overall survival when used in combination with existing metastatic colorectal cancer therapy. Therefore, prediction of VEGF production based on individual genetic background might be important for predicting the course of the disease and the efficacy of anticancer treatment. The number of studies evaluating the influence of VEGF polymorphisms on cancer susceptibility is growing; however, their results are often conflicting. In addition, these studies are rarely accompanied with the expression analysis examining the influence of these polymorphisms on mRNA expression in tumor tissue. In this study, we have examined the influence of VEGF polymorphisms -1154 G/A and -460 C/T on VEGF mRNA expression and susceptibility to sporadic colon cancer by real-time PCR-SNP and mRNA expression analysis. The study included population control group consisting of 160 unrelated volunteers and a group of 160 patients with sporadic colon cancer. According to our results, -1154 G/A and -460 C/T do not influence VEGF mRNA expression in colorectal tumors and susceptibility to sporadic colon cancer, although the role of other polymorphisms cannot be excluded.