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J Hepatol. 2006 Apr;44(4):671-8. Epub 2006 Jan 30.

A phase 2 study to evaluate the antiviral activity, safety, and pharmacokinetics of recombinant human albumin-interferon alfa fusion protein in genotype 1 chronic hepatitis C patients.

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University of Alberta, Liver Unit, Zeidler Ledcor Center, 130 University Campus, Edmonton, Alberta, Canada, T6G 2X8.



Recombinant human albumin-interferon alfa (alb-IFN) is a novel 85.7-kD recombinant protein consisting of interferon alfa-2b genetically fused to human serum albumin.


A phase 2, open-label, dose-ranging study was conducted in IFN-alfa-naïve patients with genotype 1 chronic hepatitis C to evaluate the antiviral activity, safety, and pharmacokinetics of alb-IFN. Fifty-six patients were enrolled to receive two subcutaneous injections of alb-IFN 14 days apart in five dose cohorts of 200, 450, 670, 900, and 1,200 microg.


A 2 log(10) IU/mL or greater reduction in hepatitis C virus (HCV) RNA at Week 4 was observed in 69% (18/26) of patients who received the higher alb-IFN doses of 900 and 1,200 microg. The mean HCV RNA reduction at Week 4 in these two higher-dose cohorts was 3.2 log(10) IU/mL. Modeling of viral kinetics demonstrated a biphasic response that was dose dependent. Adverse events were mostly mild to moderate in severity. The most common adverse events were headache (73%), chills (63%), fatigue (61%), and arthralgia (55%). The median terminal half-life was 141 h consistent with previous alb-IFN data from IFN-alfa-experienced patients.


Alb-IFN demonstrated significant antiviral activity and was well tolerated in patients with HCV genotype 1 infection.

[Indexed for MEDLINE]

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