Xianyou county of Fujian province, located on the southeast coastal of China, has higher gastric cancer mortality. Chronic inflammation plays an important role in the occurrence of gastric cancer, in which the nuclear factor-κB signaling pathway of the inflammatory reaction begins and plays an important role in the amplification process. Studies have found that a single-nucleotide polymorphism of nuclear factor-κB signaling pathway molecules encoding genes is associated with gastric cancer, but the combined effect of the nuclear factor-κB signaling pathway gene has not been explained nor has been cardia and non-cardia gastric cancer risk factors and genetic susceptibility loci. New gastric cancer cases of the Fujian Xianyou Hospital were the research object. They were divided into cardia and non-cardia cancer in order to study a single-nucleotide polymorphism of the nuclear factor-κB signaling pathway important node molecules P50 and I kappa B encoding genes NFKB1 and NFKBIA by desorption ionization time of flight mass spectrometry analysis and by matrix-assisted laser mass spectrometry. The results showed that NFKB1 and NFKBIA single-nucleotide polymorphisms and gastric cancer are related and that the combined effects of polymorphisms in two genes and the NFKBIA gene monomer increased the risk of gastric cancer, and it was found that in different types of gastric cancer (the cardia and non-cardia cancer), susceptible polymorphism sites and combined effects are different.
Keywords: Gastric cancer; combined action; gene polymorphism; haplotype analysis; the nuclear factor-κB signaling pathway.