title: Genetic polymorphisms of interleukin (IL)-1B, IL-1RN, IL-8, IL-10 and tumor necrosis factor {alpha} and risk of gastric cancer in a Chinese population.
abstract: Helicobacter pylori infection and the cytokine-mediated inflammatory responses play important roles in gastric cancer pathogenesis. This case control study was conducted to assess the association between genetic polymorphisms in interleukin (IL)-1B, IL-1RN, IL-8, IL-10 and tumor necrosis factor alpha (TNFalpha), which are involved in H.pylori infection, and risk of gastric cancer. Genotypes were determined by PCR-based denaturing high-performance liquid chromatography analysis and direct DNA sequencing in 250 incident cases with gastric cancer and 300 controls recruited in Northern China. Serum levels of anti-H.pylori IgG and IgA were measured by enzyme-linked immunosorbent assay to indicate H.pylori infection. We found that the risk of gastric cancer was significantly elevated in subjects with the IL-8-251 AA [adjusted odds ratio (OR) 2.02; 95% confidence interval (CI) 1.27-3.21] or IL-10-1082 G (OR 2.02; 95% CI 1.24-3.29) or TNFalpha-308 AG (OR 1.81; 95% CI 1.04-3.14) genotype. An elevated risk of gastric cancer was observed in subjects with H.pylori infection and the IL-8-251 AA genotype (OR 2.54; 95% CI 1.38-4.72) or IL-10-1082 G carriers (OR 2.62; 95% CI 1.42-4.93). An increased OR was also suggested for IL-1B-31 and TNFalpha-238, but confidence intervals included the null value. There was no evidence of increased risk for any of the other polymorphisms evaluated. These findings suggest that genetic polymorphisms in IL-8, IL-10 and TNFalpha may play important roles in developing gastric cancer in the Chinese population.
authors.affiliation: Department of Cancer Epidemiology, Peking University School of Oncology, Beijing Institute for Cancer Research, Beijing Cancer Hospital, Beijing 100036, People's Republic of China.
authors.forename: Wanli
authors.initials: W
authors.lastname: Lu
authors.forename: Kaifeng
authors.initials: K
authors.lastname: Pan
authors.forename: Lian
authors.initials: L
authors.lastname: Zhang
authors.forename: Dongxin
authors.initials: D
authors.lastname: Lin
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Miao
authors.forename: Weicheng
authors.initials: W
authors.lastname: You
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001483:Base Sequence; D002851:Chromatography, High Pressure Liquid; D017931:DNA Primers; D005260:Female; D006801:Humans; D007378:Interleukins / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000235:genetics* / Q000473:pathology; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
chemical_list: D017931:DNA Primers; D007378:Interleukins; D014409:Tumor Necrosis Factor-alpha