The impact of IL-6 and IL-28B gene polymorphisms on treatment outcome of chronic hepatitis C infection among intravenous drug users in Croatia
نویسندگان
چکیده
BACKGROUND Several genes and their single nucleotide polymorphisms (SNPs) are associated with either spontaneous resolution of hepatitis C infection or better treatment-induced viral clearance. We tested a cohort of intravenous drug users (IVDU) diagnosed with chronic hepatitis C virus (HCV) for treatment response and its association with the SNPs in the interleukin-6 (rs1800795-IL6) and the interleukin-28B (rs12979860-IL28B) genes. METHODS The study included 110 Croatian IVDU positive for anti-HCV antibody. Genotyping was performed by polymerase chain reaction (PCR) based approach. Patients were treated by standard pegylated-interferon/ribavirin and followed throughout a period of four years, during which sustained virological response (SVR) was determined. All data were analysed with statistical package SPSS 19.0 (IBM Corp, Armonk, NY, USA) and PLINK v1.07 software. RESULTS Patients showed a significantly better response to treatment according to the number of copies of the C allele carried at rs1800795-IL6 (P = 0.034). All but one of the patients with CC genotype achieved SVR (93%), whereas the response rate of patients with GG genotype was 64%. The association of rs1800795-IL6 with SVR status remained significant after further adjustment for patients' age, fibrosis staging, and viral genotype (OR 2.15, 95% CI 1.16-4.68, P = 0.019). Distributions of allele frequencies at the locus rs12979860-IL28B among the study cohort and the underlying general population were suggestive of a protective effect of CC genotype in acquiring chronic hepatitis C in the Croatian IVDU population. DISCUSSION The rs1800795-IL6 polymorphism is associated with positive response to treatment in IVDU patients positive for HCV infection. A protective role of rs12979860-IL28B CC genotype in acquiring chronic hepatitis C is suggested for Croatian IVDU population.
منابع مشابه
The impact of IL - 6 and IL - 28 B gene polymorphisms on treatment outcome of chronic 2 hepatitis C infection among intravenous drug users in Croatia 3 4 5
متن کامل
ارتباط واریانت های ژنتیکی اینترلوکین- B28 با بیماری هپاتیت C
Background and purpose: Host genetic and environmental factors and factors associated with hepatitis C virus (HCV) play critical roles in development of the hepatitis. This study was performed to investigate the association between Interleukin-28B (IL-28B) genetic variants and chronic hepatitis C. Materials and methods: This case-control study was conducted in 133 HCV-RNA positive patients att...
متن کاملPolymorphism of IL-28B Gene (rs12979860) in HCV Genotype 1 Patients Treated by Pegylated Interferon and Ribavirin
Background: Nowadays, the immune response to hepatitis C (HCV) treatment has become a crucial issue mostly due to the interleukin 28B (IL-28B) polymorphism effects in chronic HCV patients. The aim of this study was to detect the polymorphism of IL-28B gene (rs12979860) in HCV genotype 1 patients treated with pegylated Interferon and Ribavirin. Methods...
متن کاملررسی ارتباط پلی‌مورفیسم تک نوکلئوتیدی rs 10853728 در ناحیه‌ی پروموتر ژن IL-28B در بیماران ایرانی مبتلا به هپاتیت C تحت درمان با داروهای پگ اینترفرون آلفا و ریباورین
Background and Objective: Genetic factors greatly impact the response to treatment in patients. Recent studies on rs10853728 single nucleotide polymorphisms in the promoter area, determined the IL-28B gene as a host factor affecting the treatment of hepatitis C infection. The aim of this study was to evaluate this polymorphism among Iranian patients Materials and Methods: This cross-sectiona...
متن کاملبر IL 28B ژن rs اثر پلی مورفیسم تک نوکلئوتیدی 12979860 پاسخ به درمان با پگ- اینترفرون/ریباورین در بیماران C ایرانی مبتلا به هپاتیت
Background and purpose: The standard of care treatment for infected patients with HCV is based on a combination of pegylated interferon alpha and ribavirin. Recently, the rs12979860 SNP polymorphism, located upstream of the interleukin 28B gene, was shown to be strongly associated with response to anti-HCV therapy. This study investigated the distribution of the (C/T) polymorphism with sust...
متن کامل