Interaction among Caveolin-1 genotypes (rs3807987/rs7804372), H. pylori infection,and risk of gastric cancer in a Chinese population

Caveolin-1, a candidate tumor suppressor, interacts with a number of transducing molecules and plays a regulatory role in several signaling pathways. Recently, a study revealed that Cav-1 G14713A (rs3807987)/T29107A (rs7804372) polymorphisms might be associated with the susceptibility to certain cancers. In this study, we evaluated the interaction among Caveolin-1 genotypes (rs3807987/rs7804372) and Helicobacter pylori infection and increased risk of gastric cancer among the Chinese population. Blood specimens were collected from 412 gastric cancer cases to 412 noncancer controls between January 2004 and December 2012 in Liaoning Province, China. Caveolin-1 genotypes (rs3807987/rs7804372) were determined by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Enzyme-linked immunosorbent assays were used to measure serum levels of anti-H. pylori IgG. Odds ratio and 95 % confidence interval were calculated using multivariate logistic regression adjusted by sex and age. There were significant differences between gastric cancer and control groups in the distribution of their genotypes and allelic frequencies of the Cav-1 G14713A (rs3807987) and T29107A (rs7804372) polymorphisms, respectively. An elevated risk of gastric cancer was observed in patients with H. pylori infection combined with the Cav-1 G14713A, but not T29107A genotypes. The A allele of G14713A shows an interaction with H. pylori infection that increases the risk of gastric cancer.