Conditions: Hepatitis C
Keywords: Hepatitis C TMC435 PSI-7977 GS7977 Ribavirin HCV Hep C Genotype 1
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 168
Healthy volunteers: no

Brief summary:
The purpose of this study is to investigate the efficacy and safety of TMC435 plus PSI-7977 (GS7977) with or without ribavirin in patients who are chronically infected with genotype 1 hepatitis C virus (HCV) and who did not respond to prior peginterferon/ribavirin therapy or are HCV treatment-naive (patients who never received treatment for HCV infection).

Detailed description:
This is a Phase IIa, randomized (the study medications are assigned by chance), open label (all people know the identity of the intervention) study of TMC435 plus PSI-7977 (GS7977) with or without ribavirin. The study consists of a screening phase (6 weeks); a treatment phase (12 or 24 week period); and a posttreatment phase (follow-up period up to Week 48). Approximately 180 patients will be enrolled in this study. Patients will be sequentially enrolled into two cohorts in this study. Cohort 1 (90 patients) will include patients without advanced hepatic fibrosis who did not respond to previous PegIFN/ribavirin therapy and Cohort 2 (90 patients) will include only patients with advanced hepatic fibrosis who did not respond to previous PegIFN/ribavirin therapy or are HCV treatment-naive. Safety will be evaluated throughout the study and will include evaluations of adverse events, clinical laboratory tests, electrocardiogram, vital signs, and physical examination. The entire study duration for each participant will be approximately 48 weeks.

Arms:
arm 1: 30 patients will receive TMC435 (150 mg once a day) plus PSI-7977(GS7977) (400 mg once a day) with ribavirin (1000-1200 mg/day) for 24 weeks and followed by a 24-week follow-up phase. arm 2: 15 patients wiil receive TMC435 (150 mg once a day) plus PSI-7977 (GS7977) (400 mg once a day) for 24 weeks of and followed by a 24-week follow-up phase. arm 3: 30 patients will receive TMC435 (150 mg once a day) plus PSI-7977 (GS7977) (400 mg once a day) with ribavirin (1000-1200 mg/day) for 12 weeks and followed by a 36-week follow-up phase. arm 4: 15 patients will receive TMC435 (150 mg once a day) plus PSI-7977 (GS7977) (400 mg once a day) for 12 weeks and followed by a 36-week follow-up phase.

Interventions: intervention 1: TMC435 intervention 2: PSI-7977 (GS7977) intervention 3: Ribavirin
Intervention descriptions: intervention 1: TMC435 will be administered as one oral capsule of 150 mg once a day. intervention 2: PSI-7977 (GS7977) will be administered as oral tablets (2 tablets of 200 mg for Cohort 1 and 1 tablet of 400 mg for Cohort 2) once a day. intervention 3: Ribavirin will be administered according to body weight. For patients with body weight less than 75 kg daily dose (1000 mg) will be administered as 400 mg (2 oral tablets of 200 mg) in the morning and 600 mg (3 oral tablets of 200 mg) in the evening. Body weight more than or equal to 75 kg daily dose (1200 mg) will be administered as 600 mg twice a day (3 tablets of 200 mg per intake, morning and evening).

Protocol document: