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Real-Time Polymerase Chain Reaction-Based Detection and Quantification of Hepatitis B Virus DNA
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Polymorphisms of some cytokines and chronic hepatitis B and C virus infection

Qiu-Ju Gao1, Dian-Wu Liu, Shi-Yong Zhang

  • 1Department of Epidemiology, Public Health College, Hebei Medical University, Hebei Province, China.

World Journal of Gastroenterology
|November 26, 2009
PubMed

Insights

Cytokine gene polymorphisms, including IL-2, IFN-gamma, and IL-10, are linked to persistent hepatitis B (HBV) and hepatitis C (HCV) infections and their clinical outcomes. These genetic variations impact viral replication and liver damage in patients with HBV and HCV.

Area of Science:

  • Immunogenetics
  • Hepatology
  • Virology

Background:

  • Hepatitis B virus (HBV) and hepatitis C virus (HCV) infections pose significant global health challenges.
  • Genetic factors, particularly cytokine gene polymorphisms, may influence individual susceptibility and disease progression.

Purpose of the Study:

  • To investigate the association between specific cytokine gene polymorphisms and the outcomes of HBV and/or HCV infections.
  • To determine if genetic variations in IL-2, IFN-gamma, IL-10, and IL-4 impact viral persistence, clinical progression, and liver damage.

Main Methods:

  • Genotyping of IL-2-330, IFN-gamma+874, IL-10-1082/-592, and IL-4-589 polymorphisms in 203 HBV/HCV-infected patients and 74 controls using PCR-based methods.
  • Detection of viral presence (PCR), antibodies (ELISA), and liver injury markers (ALT, AST).

Main Results:

  • Persistent HBV, HCV, and coinfection were associated with IL-2-330 TT, IFN-gamma+874 AA, and IL-10-1082 AA genotypes.
  • Specific genotypes (e.g., IL-2-330 TT, IL-10-1082 AA) correlated with adverse clinical outcomes and progression.
  • HCV RNA positivity linked to IL-10-1082 AA genotype; abnormal ALT levels associated with IL-10-592 AC and IL-4-589 CC/CT genotypes.

Conclusions:

  • Cytokine gene polymorphisms play a role in determining the outcome of HBV and HCV infections.
  • These genetic variations influence viral persistence, clinical progression, viral replication, and the severity of liver damage.
Abstract

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