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Efficacy and Safety of MP-424/Peginterferon Alfa-2b/Ribavirin Combination in Treatment-Naïve Patients With Chronic Hepatitis C

A Phase 3 Study of MP-424 in Combination With Peginterferon Alfa-2b and Ribavirin, in Treatment-Naïve Subjects With Genotype 1 Hepatitis C

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00780416
Enrollment
189
Registered
2008-10-27
Start date
2008-11-30
Completion date
2010-08-31
Last updated
2026-01-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hepatitis C

Keywords

Chronic Hepatitis C, Protease Inhibitor, Telaprevir, Peginterferon Alfa-2b, Ribavirin

Brief summary

This study will evaluate the efficacy and safety of MP-424 with Peginterferon Alfa-2b (PEG-IFN) and Ribavirin (RBV) in treatment-naïve patients with (Genotype 1) hepatitis C.

Interventions

DRUGMP-424

750 mg every 8 hours for 12 weeks

DRUGRibavirin

600 - 1000 mg/day based on body weight for 24 weeks

DRUGPeginterferon Alfa-2b

1.5 mcg/kg/week for 24 weeks

Sponsors

Vertex Pharmaceuticals Incorporated
CollaboratorINDUSTRY
Tanabe Pharma Corporation
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
20 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Genotype 1, chronic hepatitis C * Treatment-naïve (patient who has received no previous interferon based treatment for hepatitis C) * Able and willing to follow contraception requirements

Exclusion criteria

* Cirrhosis of the liver or hepatic failure * Hepatitis B surface antigen-positive or HIV antibodies-positive * History of, or concurrent hepatocellular carcinoma * History of, or concurrent depression, schizophrenia; or suicide attempt in the past * Pregnant, lactating, or suspected pregnant patients, or male patients whose female partner is pregnant

Design outcomes

Primary

MeasureTime frame
The Percentage of Subjects Achieving Undetectable Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at 24 Weeks After Completion of Drug Administration (SVR, Sustained Viral Response)After 24 weeks of follow-up

Countries

Japan

Participant flow

Participants by arm

ArmCount
TRV/PEG/RBV
Drug: MP-424 750 mg every 8 hours for 12 weeks Other Name: Telaprevir Drug: Ribavirin 600 - 1000 mg/day based on body weight for 24 weeks Drug: Peginterferon Alfa-2b 1.5 mcg/kg/week for 24 weeks
126
PEG/RBV
Drug: Ribavirin 600 - 1000 mg/day based on body weight for 48 weeks Drug: Peginterferon Alfa-2b 1.5 mcg/kg/week for 48 weeks
63
Total189

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyPhysician Decision33
Overall StudyProtocol Violation10
Overall StudyWithdrawal by Subject86

Baseline characteristics

CharacteristicTRV/PEG/RBVPEG/RBVTotal
Age, Continuous50.8 years
STANDARD_DEVIATION 10.4
52.2 years
STANDARD_DEVIATION 9.7
51.3 years
STANDARD_DEVIATION 10.2
Sex: Female, Male
Female
60 Participants30 Participants90 Participants
Sex: Female, Male
Male
66 Participants33 Participants99 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
126 / 12663 / 63
serious
Total, serious adverse events
15 / 1266 / 63

Outcome results

Primary

The Percentage of Subjects Achieving Undetectable Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at 24 Weeks After Completion of Drug Administration (SVR, Sustained Viral Response)

Time frame: After 24 weeks of follow-up

ArmMeasureValue (NUMBER)
TRV/PEG/RBVThe Percentage of Subjects Achieving Undetectable Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at 24 Weeks After Completion of Drug Administration (SVR, Sustained Viral Response)73.0 percentage of subjects achieving SVR
PEG/RBVThe Percentage of Subjects Achieving Undetectable Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at 24 Weeks After Completion of Drug Administration (SVR, Sustained Viral Response)49.2 percentage of subjects achieving SVR

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026