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Effect of IL-12B, IL-2, TGF-β1, and IL-4 polymorphism and expression on hepatitis B progression

Roli Saxena1, Yogesh Kumar Chawla, Indu Verma

  • 11 Department of Biochemistry, Postgraduate Institute of Medical Education and Research , Chandigarh, India .

Journal of Interferon & Cytokine Research : the Official Journal of the International Society for Interferon and Cytokine Research
|October 29, 2013
PubMed

Insights

Specific cytokine gene variations influence hepatitis B virus (HBV) disease progression and hepatocellular carcinoma (HCC) risk in India. Certain genotypes of IL-12B, TGF-β1, and IL-2 are linked to HCC development, while IL-4 may affect disease progression to cirrhosis.

Area of Science:

  • Immunogenetics
  • Hepatology
  • Oncology

Background:

  • Chronic inflammation from hepatitis B virus (HBV) infection is a primary driver of disease chronicity.
  • Cytokines are crucial in orchestrating inflammatory responses during HBV pathogenesis.

Purpose of the Study:

  • To investigate the association between specific genotypes and expression levels of IL-12B, IL-2, TGF-β1, and IL-4 with HBV-related hepatocellular carcinoma (HCC) risk in an Indian population.
  • To explore the role of these cytokines in the chronicity and progression of HBV infection.

Main Methods:

  • Genotyping of IL-12B(+1188), IL-2(-330), TGF-β1(-509), and IL-4(-590) using PCR-based methods (PCR-RFLP, AS-PCR).
  • Quantification of cytokine mRNA and protein levels via RT-PCR and ELISA, respectively.
  • Analysis of 403 subjects, including controls, HBV carriers, chronic hepatitis patients, cirrhotics, and HCC patients.

Main Results:

  • The IL-12B(+1188) CC genotype showed a positive association with hepatitis in controls.
  • TGF-β1(-509) TT genotype was a potential protective factor against cirrhosis and HCC risk in carriers.
  • IL-4(-590) CT genotype demonstrated a protective role against hepatitis development in carriers.
  • IL-12B, TGF-β1, and IL-2 appear involved in HCC development, while IL-4 may influence progression to cirrhosis.

Conclusions:

  • Genetic variations and expression levels of IL-12B, IL-2, IL-4, and TGF-β1 play a significant role in HBV disease chronicity and HCC development in the Indian population.
  • These findings highlight potential genetic markers for predicting HBV disease outcomes and HCC risk.

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