IL-10 haplotypes as possible predictors of spontaneous clearance of HCV infection

A. Mangia, R. Santoro, M. Piattelli, V. Pazienza, G. Grifa, A. Iacobellis, A. Andriulli

Research output: Contribution to journalArticle

Abstract

Background/Aims: In hepatitis C virus infection an inappropriate ratio of pro-inflammatory and anti-inflammatory cytokines may either determine different outcomes of the infection or affect the benefit of antiviral treatment. Given that polymorphisms in regulatory regions of cytokine genes influence cytokine production, we determined frequency of polymorphisms of IL-10, IFNγ, and TNFα genes in HCV-infected patients and healthy controls, and investigated their association with either ongoing or cleared HCV infection, or with response to treatment. Methods: Genomic DNA from 270 patients and 145 controls sharing the same ethnic background was studied by polymerase chain reaction, restriction enzyme digestion, direct sequencing, and microsatellite analysis. Results: The IL-10 ATA haplotype was more frequent in patients with spontaneous HCV RNA clearance (36.0%) than in patients with persistent infection (23%) (p=0.009, p corrected = 0.036). Neither TNF -308 and -238 polymorphisms nor IFNγ alleles variability were associated with different HCV outcome. However, the combination of ATA homozygous state and IFNγ 119 allele was more frequent in patients with spontaneous HCV clearance than in patients with ongoing disease (p=0.012; p corrected = 0.048). We could not confirm the reported effect of genetic influence on the response to treatment. Conclusions: Our findings indicate that heterogeneity in the promoter region of the IL-10 gene has a role in determining a spontaneous favourable outcome of HCV infection.

Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalCytokine
Volume25
Issue number3
DOIs
Publication statusPublished - Feb 7 2004

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Keywords

  • Chronic HCV hepatitis
  • Interferon γ
  • Interleukin-10
  • TNFα
  • Viral clearance

ASJC Scopus subject areas

  • Endocrinology
  • Molecular Biology
  • Immunology
  • Immunology and Allergy

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