Safety and Antiviral Activity of Albinterferon Alfa-2b Dosed Every Four Weeks in Genotype 2/3 Chronic Hepatitis C Patients

University of Alberta, Edmonton, Canada.
Clinical gastroenterology and hepatology: the official clinical practice journal of the American Gastroenterological Association (Impact Factor: 7.9). 06/2008; 6(6):701-6. DOI: 10.1016/j.cgh.2008.02.056
Source: PubMed


A phase 2, randomized, multicenter, open-label study evaluated the safety and efficacy of albinterferon alfa-2b in interferon-alpha treatment-naïve patients with genotype 2/3, chronic hepatitis C virus infection.
Forty-three patients were randomly assigned in a 1:1 ratio to receive subcutaneous albinterferon alfa-2b 1500 microg every 4 weeks (q4wk) or every 2 weeks (q2wk) with oral ribavirin 800 mg/day for 24 weeks. Primary efficacy end point was sustained virologic response (undetectable hepatitis C virus RNA 24 weeks after completion of treatment). Insulin resistance was also assessed.
The safety of albinterferon alfa-2b was acceptable, with a similar adverse event profile in both treatment arms. Discontinuation as a result of adverse events occurred in 4.5% and 14.3% of patients in the q4wk and q2wk arms, respectively. No dose reductions caused by adverse events were reported in the q4wk arm versus 9.5% in the q2wk arm. Rapid viral response rates at week 4 were 68.2% and 76.2% for the q4wk and q2wk arms, respectively; the corresponding sustained virologic response rates were 77.3% and 61.9%. Insulin resistance at baseline was significantly associated with lower sustained virologic response rates independent of body mass index.
Albinterferon alfa-2b administered at 4-week intervals was safe and well-tolerated and demonstrated significant antiviral activity in patients with genotype 2/3, chronic hepatitis C virus. Insulin resistance appeared to have an independent effect on treatment response.

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    • "One recently developed formulation of IFN is albinterferon alfa-2b (albIFN), a novel, long-acting, genetic fusion polypeptide of recombinant human albumin and interferon alfa-2b [Subramanian et al., 2007]. This formulation extended the half-life of the recombinant polypeptide product to about 200 hr while maintaining biological activity over a 14-to 28-day interval [Subramanian et al., 2007; Bain et al., 2008]. In three separate randomized controlled trials in HCV monoinfected genotype 1 or genotype 2/3 infections, albIFN administered q2week or q4week demonstrated comparable efficacy to PegIFN [Nelson et al., 2010; Zeuzem et al., 2010]. "
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