19 February 2016 : Clinical Research
Interaction Between Polymorphisms of IFN-γ and MICA Correlated with Hepatocellular CarcinomaHongguang LiAD, Fangfeng LiuBC, Huaqiang ZhuDE, Xu ZhouDE, Jun LuCF, Hong ChangEF, Jinhua HuCFG
Med Sci Monit 2016; 22:549-553
BACKGROUND: We explored the relationship of interferon-γ (IFN-γ) and MHC class-I chain related gene A (MICA) genes polymorphisms with hepatocellular carcinoma (HCC) risk, and tried to determine whether the interaction existed between these two genes polymorphisms on the basis of HCC.
MATERIAL AND METHODS: Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was used to detect the genotypes of the 3 single-nucleotide polymorphisms (SNPs) and to analyze the correlation of each SNP with HCC susceptibility in 120 HCC patients and 124 healthy people. The association strength between the 3 SNPs and HCC is represented with odds ratio (OR) and 95% confidence interval (95% CI). Hardy-Weinberg equilibrium (HWE) was tested by χ2 test in the control group.
RESULTS: GG genotype of IFN-γ rs2069727 polymorphism had apparently different distributions in case and control groups (P<0.05), and might confer increased risk of HCC (OR=3.40, 95%CI=1.23–9.38). Analysis of MICA rs2596542 polymorphism also yielded the same result (OR=2.90, 95%CI=1.10–7.67), as did their risk alleles. Specifically, the interaction between rs2596542 and rs2069705 polymorphisms increased the HCC risk by 1.41 times and between rs2596542 and rs2069727 polymorphisms the increased risk of HCC by 5.56 times.
CONCLUSIONS: IFN-γ rs2069727 and MICA rs2596542 polymorphisms may be related to the incidence of HCC. Interaction exists between the polymorphisms of IFN-γ and MICA, which may increase risk of HCC.
Keywords: Epistasis, Genetic, Carcinoma, Hepatocellular - genetics, Gene Frequency - genetics, Genetic Association Studies, Genetic Predisposition to Disease, Histocompatibility Antigens Class I - genetics, Interferon-gamma - genetics, Polymorphism, Single Nucleotide - genetics
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