JOURNAL ARTICLE

Distribution of IL-28B genotypes in patients with hepatitis C and healthy individuals in Jahrom city

Seyed Dawood Mousavi Nasab, Rasoul Baharlou, Ahmad Piroozmand, Hadi Toghyani, Enayatollah Shadmand, Hadi Fazel, Kaveh Sadeghi, Seyed Mohammad Ali Hashemi, Mohammad Reza Shokouh, Abulfazl Gheshlaghi, Nayeb Ali Ahmadi, Abbas Ahmadi Vasmehjani
Gastroenterology and Hepatology From Bed to Bench 2015, 8 (4): 278-87
26468348

AIM: The purpose of this study was to compare the distribution of interleukin (IL)-28B genotypes between Iranian healthy individuals and patients with chronic hepatitis C based on the genotype.

BACKGROUND: Polymorphisms in the region of IL-28B gene have been identified as the strongest genetic pretreatment predictor of sustained virological response (SVR) in hepatitis C infection.

PATIENTS AND METHODS: In this study, 147 patients with chronic hepatitis C and 80 healthy individuals were included. The IL-28B rs12979860 and rs8099917 polymorphisms were genotyped by PCR-RFLP method and the frequency of IL-28B polymorphisms with respect to HCV genotypes was also determined.

RESULTS: The frequencies of rs12979860 TT, CC and CT genotypes in the chronic hepatitis C patients and healthy individuals were as follows: 10.8% vs. 11.3%, 38.7% vs. 46.2% and 50.3% vs. 42.5%. Also, the frequencies of rs8099917 TT, GG and GT genotypes in the chronic hepatitis C patients was 61.9%, 6.1% and 32% and in controls was 47.5%, 11.2% and 41.3%. The differences in the distribution of rs12979860 genotypes and alleles between HCV genotype 1 and HCV genotype 3a infected patients were statistically significant.

CONCLUSION: The rs12979860 C allele is the favorable allele for the spontaneous clearance of HCV. It seems that the impact of IL-28B polymorphism on the spontaneous clearance of HCV genotype 3 is more prominent than HCV genotype 1, which results in the observation of higher rs12979860 C allele frequency in chronic hepatitis C patients with HCV genotype 3 than HCV genotype 1.

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