Correlation between Interleukin-17 gene polymorphism and gastric cancer susceptibility in Han Chinese population.

The present study aims to investigate the correlation between Interleukin (IL)-17 gene polymorphism with gastric cancer susceptibility in Han Chinese population.Between November 2013 and October 2014, 386 patients with gastric cancer who had undergone surgeries at our institution and 374 age- and sex-matched healthy controls were included in this study. Single nucleotide polymorphisms (SNPs) of IL-17 gene (rs2275913, rs3748067, rs4711998 and rs763780) in patients and health controls were studied by using restriction fragment length polymorphism-polymerase chain reaction (RFLP-PCR) and DNA sequencing technology. The correlation between IL-17 polymorphism and gastric cancer susceptibility was analyzed using logistic regression analysis.For IL17 rs2275913, no significant differences were observed in the frequencies of AA genotype and A allele between patients and controls (c2 = 0.870 p > 0.05; c2 = 0.814 p > 0.05). In IL17 rs3748067, the frequencies of TT genotype and T allele were significantly higher in patients than in controls (c2 = 12.82 p < 0.01; c2 = 12.805 p < 0.01). For IL17A rs4711998, no significant differences were observed in the frequencies of AA genotype and A allele between patients and controls (c2 = 2.636, p > 0.05; c2 = 1.462, p > 0.05). As for ILl7F rs763780, the frequencies of GG genotype and G allele in patients were significantly different from those in controls (c2 = 16.534, p < 0.01; c2 = 16.399, p < 0.01).Polymorphism of IL-17 rs3748067 and rs763780 is closely associated with gastric cancer development. Polymorphism of L-17 rs2275913 and rs4711998 may be correlated with the risk for gastric cancer.