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  • Title: Response to combined interferon and ribavirin is better in patients infected with hepatitis C virus genotype 6 than genotype 1 in Hong Kong.
    Author: Yuen MF, Lai CL.
    Journal: Intervirology; 2006; 49(1-2):96-8. PubMed ID: 16166796.
    Abstract:
    Data on the treatment efficacy of interferon (IFN)-alpha and ribavirin in patients with chronic hepatitis infected with hepatitis C virus (HCV) of genotype 6 are lacking. A study has been reported from Hong Kong which compared the treatment efficacy of IFN-alpha and ribavirin in the treatment of chronic HCV infection with genotypes 1 and 6. Twenty-four patients with HCV genotype 1 and 16 patients with HCV genotype 6 were studied. The baseline demographic data including median age, gender ratio, alanine aminotransferase levels, bilirubin levels, HCV RNA levels and histological scores were comparable between the two groups of patients. All patients received IFN-alpha 5 million units three times per week and ribavirin (1,000 mg for those weighing </=75 kg and 1,200 mg for those weighing >75 kg) for 1 year. Patients infected with HCV genotype 6 achieved virological response significantly higher than those with HCV genotype 1 (67 vs. 33% at week 24, p = 0.02; 75 vs. 42% at the end of treatment, p = 0.05; 63 vs. 29% at 6 months after completion of treatment, p = 0.04). Histological improvement in inflammatory activity and fibrosis in the liver were observed in 25% and 25% of patients infected with HCV genotype 6 in contrast to only 13 and 8% in patients infected with HCV genotype 1; however, the differences were not statistically significant. In conclusion, patients with HCV genotype 6 gain a better response to combined treatment with IFN-alpha and ribavirin than those with HCV genotype 1 and achieve a significantly higher rate of sustained virological response.
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