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  • Title: Impact of IRGM gene promoter polymorphisms on susceptibility to chronic HBV infection.
    Author: Cheng H, Ouyang Y, Li C.
    Journal: Int J Immunogenet; 2024 Jun; 51(3):149-156. PubMed ID: 38514898.
    Abstract:
    The autophagy gene immunity-related GTPase M (IRGM) can affect the immune response against intracellular pathogens. The study was performed to determine any possible association between three IRGM single-nucleotide polymorphisms (SNPs) (rs4958842, rs4958843 and rs4958846) and chronic hepatitis B virus (HBV) infection. A total of 171 chronic HBV-infected individuals and 171 healthy controls were collected. Peripheral blood cells and Sanger sequencing were used to extract genomic DNA and determine the SNP genotypes, respectively. The C allele of rs4958843 is a risk factor for chronic HBV infection in various genetic models, including allelic, codominant and dominant models, with the following respective statistical data: allelic (T vs. C: OR = 1.371, 95% CI = 1.009-1.863, p = .043), codominant (TT vs. CC: OR = 2.137, 95% CI = 1.104-4.138, p = .024) and dominant (TT + TC vs. CC: OR = 1.976, 95% CI = 1.106-3.533, p = .021) models. The genotype and allele distributions of rs4958842 and rs4958846 showed no significant differences between chronic HBV infection patients and healthy controls. IRGM rs4958843 CC genotype carriers had significantly elevated values of alanine transaminase, aspartate transaminase alpha-fetoprotein and total bilirubin (OR = 3.467, 95%CI = 1.167-10.298), which was positively associated with the disease progression of HBV infection. Mutant allele C of IRGM rs4958843 polymorphism is associated with the risk of chronic HBV infection in the Han people in central China and contributes to the disease progression.
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