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Hepatic expression of miR-122 and antioxidant genes in patients with chronic hepatitis B

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Wójcik K., Piekarska A., Szymańska B., Jabłonowska E.
Acta Biochimica Polonica
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2016
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vol. 63
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issue 3
527-531
EN
Introduction: The pathogenesis of chronic hepatitis B depends on both, the immune response and oxidative stress. Aim of the study: To assess the hepatic expression of miR-122 and the antioxidant genes: HMOX-1, NQO1 and GFER1, in liver biopsy specimens obtained from patients with chronic hepatitis B, with regard to selected clinical and histological parameters, using RT-PCR. Results: The study group comprised 34 HBV-infected patients. Statistically significant associations were found between lower hepatic expression of HMOX-1 and greater severity of liver inflammation (p=0.04). However, significantly higher expression of NQO1 was observed in patients with advanced liver fibrosis (p=0.035). Hepatic expression of miR-122 in HBV patients was not associated with viral load or liver injury. Conclusion: The hepatic expression of HMOX-1and NQO1 may be associated with liver injuries in chronic hepatitis B. However, hepatic expression of miR-122 does not seem to correspond to progression of the liver disease.
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Sustained virologic response and IL28B single-nucleotide polymorphisms in patients with chronic hepatitis C treated with pegylated interferon alfa and ribavirin

76%
Jabłonowska E., Piekarska A., Koślińska-Berkan E., Omulecka A., Szymańska B., Wójcik K.
Acta Biochimica Polonica
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2012
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vol. 59
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issue 3
333-337
EN
Introduction. Hepatitis C virus (HCV) infection is a global health problem which can lead to liver cirrhosis or hepatocellular carcinoma in one-fifth of chronically infected patients. Materials and methods. The study group consisted of 123 patients: 90 with HCV mono- and 33 with HIV/HCV co-infection, who were treated with pegylated interferon alfa (Peg-IFN-α) and ribavirin. We analyzed selected pretreatment factors: age, sex, HIV/HCV co-infection, grade of inflammation, necrotic changes and fibrosis in histological analysis of liver bioptates, HCV viral load, HCV genotypes, and single nucleotide polymorphisms (SNPs) of IL28B and tried to find out which of them influence sustained virological response (SVR). The IL28B SNP C/T (rs12979860) was analyzed using Custom® SNP Genotyping Assays (Applied Biosystems). Results. Multivariate analysis demonstrated that after adjusting for the other variables three predictors independently influence SVR, namely genotype 3 of HCV, presence of the CC genotype and age >40 years (OR respectively 15.14, 3.62, and 0.36). HCV mono-infected patients were infected with HCV genotype 3 or 4 less frequently (p=0.0001) compared to HIV/HCV co-infected individuals. In patients with HIV/HCV co-infection the CC variant occurred more frequently whereas CT was found less frequently (p=0.001, p=0.0146, respectively). In patients with HIV/HCV co-infection, 3 and 4 genotype of HCV occurred more frequently compared to patients with HCV mono-infection (p=0.0001). Conclusions. These data suggest that age, HCV genotype and IL28B polymorphism are useful for prediction of the response to treatment with Peg-IFN-α and ribavirin. The more frequent occurrence of HCV genotypes 3 or 4 in patients with HIV/HCV co-infection could be associated with the route of transmission.
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