Based on subgroup analysis, H. pylori infection and genotype analysis using PCR-RFLP methods increase the association between IL-1β-511 T allele carrier and risk of stomach cancer.
The pro-inflammatory cytokine IL-1β plays a crucial role in the development of gastric tumors, and polymorphisms in the IL-1 gene cluster resulting in increased IL-1β production have been associated with increased risk for gastric cancer.
We tested for an association between IL-1 loci polymorphisms with increased gastric mucosal levels of IL-1beta and an increased risk of developing GC in a Korean population.
Implication of peroxisome proliferator-activated receptor gamma and proinflammatory cytokines in gastric carcinogenesis: link to Helicobacter pylori-infection.
The aim of this study was to prospectively investigate the relationship between selected polymorphisms in three of the major IL-1 gene family members, seeking associations with H. pylori infection and/or gastric cancer.
These findings suggest that the IL1B-511T/T allele is associated with enhanced hypermethylation of multiple CpG island loci, which might contribute to an increase in the risk for gastric cancer in individuals with H. pylori infection and IL1B-511T/T allele.
Multivariate regression analysis showed that cagE, babA2, and IL-1RN-1/2 genotypes were independent predictors of GC, but when patients with benign disorders were grouped together (NUD + DU) and compared with patients with GC, regression analysis disclosed that babA2 (P = 0.000) and IL-1B-31 gene polymorphisms (CC or CT) (P = 0.01) were the only independent markers of GC.
It has been reported that interleukin-1beta (IL-1B) genes play a crucial role in the genetic predisposition to gastric cancer although there is no information about their role in different subtypes of gastric cancer.
These results suggested that SNPs in the IL-1 family genes play important roles in the development of GC and the IL-1F5 might be the target gene of miR-197, and miR-197 might negatively regulate its expression.
Polymorphisms of the IL-1B and IL-1RN genes (which encode interleukin [IL]-1beta and IL-1 receptor antagonist, respectively) have been associated with hypochlorhydria and gastric cancer.
Moderate to high Cap consumption synergistically increased GC risk in genetically susceptible individuals (IL1B-31C allele carriers) infected with the more virulent H. pylori (CagA+) strains.
In the Chinese subgroup, nominally significant associations were shown between (i) EBBR2+1963G (rs1801200) and H. pylori infection (per-allele OR: 0.48, 95% CI 0.23, 0.98, P = 0.04), (ii) PTGS2-1195G (rs689466) and an increased risk of GC on adjusting for H. pylori status (OR: 1.53, 95% CI 0.99, 2.37, P = 0.05), and (iii) IL1B-1473C (rs1143623) and a decreased risk of GC (OR: 0.64, 95% CI 0.41, 0.99, P = 0.05).
The distribution of the four major IL1B variants (IL1B-3737C>T, -1464G>C, - 511C>T, -31T>C) were analyzed in 116 and 142 patients with gastric cancer and 'high risk gastritis', respectively, as well as 94 healthy controls.
Proinflammatory genotypes of the IL-1 (interleukin-1) gene have been associated with an increased gastric cancer risk in Caucasians, whereas some studies in Asian populations did not find such association.
The purpose of this study was to examine the association between IL-1 genotype and gastric cancer by systematically reviewing the risk of the original studies.