ABSTRACT
Background and purpose:Vascular endothelial growth factor(VEGF) is a potent angiogenic mediator and angiogenesis has important effects on tumor growth and metastasis.The present study was to investigate the relationship between genetic polymorphism of VEGF and heredity risk factor of lung cancer.Methods:VEGF genotypes were determined by PCR-RFLP method in 171 patients with lung cancer and 172 healthy controls.Software PHASE 1.0 was used to construct the haplotypes of every individual.Unconditional logistic regression model was used to analyze the statistical association of genotypes or haplotypes in the two groups adjusted by gender and age. Results:Individuals with at least one-2578A allele had a significantly decreased risk of lung cancer compared with those carrying-2578CC genotype.When the analyses were stratified by gender,the combined-2578 CA and AA genotype,were associated with a considerably reduced risk of lung cancer(P=0.001,OR=0.303,95%CI=0.15 3-0.601).The distribution of the two haplotypes(936C/-2578C and 936C/-2578A) among overall lung cancer cases was significantly different from that among the controls(P=0.016,0R=0.317,95%CI=0.124-0.809 and P=0.018,OR=0.547, 95%CI=0.331-0.903).When the cases were categorized by tumor histology,the distribution of C-C haplotype in the adenocarcinoma(AC) group was associated with a substantially lowered risk of AC(P=0.004,0R=0.237,95%CI=0.090- 0.627),compared with the reference haplotypes.Conclusion:VEGF polymorphism may be a critical risk for the genetic risk factor to lung cancer.