Conditions: Hepatitis C HCV Chronic Hepatitis C Infection Hepatitis C Genotype 1
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 74
Healthy volunteers: no

Brief summary:
This study assessed the safety, tolerability, pharmacokinetics, and antiviral activity of multiple oral doses of ABT-450/ritonavir (r), ABT-333 (also known as dasabuvir), or ABT-072 in hepatitis C virus (HCV), genotype 1-infected, treatment-naïve adults.

Detailed description:
This was a Phase 2a, randomized, blinded, placebo-controlled, dose-ranging study in chronically, hepatitis C virus (HCV) genotype 1-infected participants designed to explore the safety, tolerability, pharmacokinetics, antiviral activity, as well as the evolution and persistence to resistance of ABT-450/r, ABT-333, or ABT-072. Participants were treated with ABT-450/r, ABT-333, or ABT-072 monotherapy for 3 days, followed by 81 days (12 weeks minus 3 days of monotherapy) of ABT-450/r, ABT-333, or ABT-072 combined with pegylated interferon/ribavirin (pegIFN/RBV), followed by 36 weeks of pegIFN/RBV alone. Participants randomized to an ABT-450/r treatment group who achieved rapid virologic response (RVR) and had HCV ribonucleic acid (RNA) levels \< 25 IU/mL at all subsequent visits were eligible to stop pegIFN/RBV therapy on or after Week 24.

Arms:
arm 1: Participants received 50 mg ABT-450 and 100 mg ritonavir (r) monotherapy once daily for 3 days, followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 2: Participants received 100 mg ABT-450 and 100 mg ritonavir (r) monotherapy once daily for 3 days, followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 3: Participants received 200 mg ABT-450 and 100 mg ritonavir (r) monotherapy once daily for 3 days, followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 4: Participants received 100 mg ABT-072 monotherapy once daily for 3 days followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 5: Participants received 300 mg ABT-072 monotherapy once daily for 3 days followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 6: Participants received 600 mg ABT-072 monotherapy once daily for 3 days followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 7: Participants received 400 mg ABT-333 monotherapy twice a day for 3 days, followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 8: Participants received 800 mg ABT-333 monotherapy twice a day for 3 days, followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day. arm 9: Participants received matching placebo for ABT-450/r, ABT-072, or ABT-333 monotherapy at each dose level for 3 days, followed by the addition of pegylated interferon/ribavirin (pegIFN/RBV) for a total of 12 weeks of combination treatment, followed by 36 weeks of pegIFN/RBV alone. Pegylated interferon was dosed at 180 µg subcutaneously once a week and RBV was dosed 1000 or 1200 mg daily divided twice a day.

Interventions: intervention 1: ABT-450 intervention 2: ABT-072 intervention 3: ABT-333 intervention 4: Ritonavir intervention 5: Peginterferon alpha-2a intervention 6: Ribavirin intervention 7: Placebo
Intervention descriptions: intervention 1: 50 mg capsules co-administered with ritonavir intervention 2: 50 mg tablet intervention 3: 400 mg tablet intervention 4: 100 mg capsules co-administered with ABT-450 intervention 5: Syringe, 180 µg/0.5 mL for subcutaneous injections intervention 6: 200 mg tablet dosed at 1000 or 1200 mg daily divided twice a day intervention 7: Matching placebo for ABT-450/r, ABT-072, or ABT-333 monotherapy at each dose level

Protocol document: