Interleukin 28B-related polymorphisms: a pathway for understanding hepatitis C virus infection?

Area of Science:

• Genetics
• Hepatology
• Virology

Background:

• Hepatitis C virus (HCV) infection is a significant global health concern.
• Interleukin-28B (IL28B) gene polymorphisms have been linked to HCV infection outcomes.
• Understanding genetic factors influencing HCV infection in diverse populations is crucial.

Purpose of the Study:

• To investigate the association of IL28B gene single nucleotide polymorphisms (SNPs), rs12979860 and rs8099917, with HCV genotype 1 infection in a Brazilian cohort.
• To determine if these SNPs predict sustained virological response (SVR) to antiviral therapy.

Main Methods:

• Genotyping of rs12979860 and rs8099917 was performed on 145 Brazilian patients with chronic hepatitis C (CHC) genotype 1 and 199 healthy controls.
• Patients received pegylated-interferon and ribavirin combination therapy.
• Polymerase chain reaction-restriction fragment length polymorphism and amplicon sequencing were used for SNP analysis.

Main Results:

• Significant differences in genotype and allele distributions of both SNPs were observed between CHC patients and controls.
• The rs12979860 C allele and CC genotype were associated with higher rates of SVR (P=0.02).
• Carriers of the rs8099917 T allele also showed significantly higher SVR rates (P=0.02).

Conclusions:

• The rs12979860 C and rs8099917 T alleles may confer a protective effect against HCV infection in Brazilians.
• These IL28B polymorphisms are potential predictors of treatment response in HCV genotype 1 patients.