Grazoprevir (MK-5172) and Elbasvir (MK-8742) Combination in Treatment-Naïve Hepatitis C Virus Participants (MK-5172-067)

January 11, 2019 updated by: Merck Sharp & Dohme LLC

A Phase III Randomized Multinational Clinical Trial to Study the Efficacy and Safety of the Combination Regimen of MK-5172/MK-8742 in Treatment-Naïve Subjects With Chronic HCV GT 1, GT 4 and GT 6 Infection

This is a randomized, parallel-group, placebo-controlled, multi-site, multinational, double-blind followed by open label period, Phase 3 trial of 100 mg of grazoprevir (MK-5172) in combination with 50 mg of elbasvir (MK-8742) (grazoprevir/elbasvir fixed-dose combination [FDC]) in treatment-naïve (TN) participants with chronic hepatitis C virus (HCV), genotype (GT) 1, 4 or 6 infection. The primary hypothesis is that the percentage of participants receiving grazoprevir/elbasvir FDC in the Immediate Treatment Group (ITG) achieving Sustained Virologic Response 12 weeks after the end of all study therapy (SVR12) will be superior to the historical reference rate of 73%.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

489

Phase

  • Phase 3

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Has documented chronic HCV GT1, GT4, or GT6 (with no evidence of non-typeable or mixed genotype) infection
  • Meets clinical criteria for presence or absence of cirrhosis based on liver disease staging assessment
  • Is abstinent or uses acceptable method(s) of contraception

Exclusion Criteria:

  • Has evidence of decompensated liver disease
  • Is coinfected with hepatitis B virus or human immunodeficiency virus (HIV)
  • Shows evidence of hepatocellular carcinoma (HCC) or is under evaluation for HCC
  • Has a clinically-relevant drug or alcohol abuse within 12 months of screening
  • Is pregnant or breast-feeding
  • Has any condition or abnormality that might confound the results of the trial or pose an additional risk to the participant

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Immediate Treatment Group (ITG): Grazoprevir/Elbasvir
Participants receive a grazoprevir/elbasvir FDC tablet once daily (q.d.) by mouth during a 12-week Active Treatment period (Week 1 to Week 12) and are followed-up for 24 weeks to Week 36.
Drug: Grazoprevir/Elbasvir
FDC tablet containing 100 mg of grazoprevir and 50 mg of elbasvir taken q.d. by mouth for 12 weeks.
Other Names:
  • MK-5172A
Placebo Comparator: Deferred Treatment Group (DTG): Placebo > Grazoprevir/Elbasvir
Participants receive a placebo tablet q.d. by mouth for 12 weeks (placebo treatment period). After a 4-week Follow-Up period, participants receive open-label grazoprevir/elbasvir FDC during a 12-week Active Treatment period (Week 16 to Week 28). Participants are then followed-up for 24 weeks to Week 52.
Drug: Placebo
Placebo tablet matching grazoprevir/elbasvir FDC tablet taken q.d. by mouth for 12 weeks.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants Achieving Sustained Virologic Response 12 Weeks After the End of All Study Therapy (SVR12)
Time Frame: 12 weeks after end of all therapy (Study Week 24)
Blood was drawn from each participant to assess Hepatitis C Virus ribonucleic acid (HCV RNA) plasma levels using the Roche COBAS® AmpliPrep/COBAS® Taqman HCV Test, v2.0, which had a lower limit of quantification (LLOQ) of 15 IU/mL. SVR12 was defined as HCV RNA below the lower limit of detection (<LLOQ) at 12 weeks after the end of all study therapy. As pre-specified in the protocol, the Deferred Treatment Group was not included in the primary efficacy analysis.
12 weeks after end of all therapy (Study Week 24)
Percentage of Participants Experiencing at Least One Adverse Event (AE) During the DB Treatment Period and First 14 Follow-up Days
Time Frame: DB Treatment period plus first 14 follow-up days (up to 14 weeks)
An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavourable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a pre-existing condition that is temporally associated with the use of the Sponsor's product, is also an AE. The primary safety analysis compared the safety data of the Immediate Treatment Group during the active treatment period to those of the Deferred Treatment Group during the placebo treatment period.
DB Treatment period plus first 14 follow-up days (up to 14 weeks)
Percentage of Participants That Discontinued From Study Therapy Due to AEs During the DB Treatment Period
Time Frame: DB Treatment period (up to 12 weeks)
An AE is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavourable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a pre-existing condition that is temporally associated with the use of the Sponsor's product, is also an AE. A participant could discontinue from treatment but continue to participate in the study as long as consent was not withdrawn. The primary safety analysis compared the safety data of the Immediate Treatment Group during the active treatment period to those of the Deferred Treatment Group during the placebo treatment period.
DB Treatment period (up to 12 weeks)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants Achieving Sustained Virologic Response 24 Weeks After the End of All Study Therapy (SVR24)
Time Frame: 24 weeks after end of all therapy (Study Week 36)
Blood was drawn from each participant to assess HCV RNA plasma levels using the Roche COBAS® AmpliPrep/COBAS® Taqman HCV Test, v2.0, which had a LLOQ of 15 IU/mL. SVR24 was defined as HCV RNA <LLOQ at 24 weeks after the end of all study therapy. As pre-specified in the protocol, the Deferred Treatment Group was not included in the secondary efficacy analysis.
24 weeks after end of all therapy (Study Week 36)

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants Achieving Sustained Virologic Response 4 Weeks After the End of All Study Therapy (SVR4)
Time Frame: 4 weeks after end of all therapy (Study Week 16)
Blood was drawn from each participant to assess HCV RNA plasma levels using the Roche COBAS® AmpliPrep/COBAS® Taqman HCV Test, v2.0, which had a LLOQ of 15 IU/mL. SVR4 was defined as HCV RNA <LLOQ at 4 weeks after the end of all study therapy. As pre-specified in the protocol, the Deferred Treatment Group was not included in this efficacy analysis.
4 weeks after end of all therapy (Study Week 16)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Merck Sharp & Dohme LLC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 28, 2015

Primary Completion (Actual)

September 27, 2016

Study Completion (Actual)

April 10, 2017

Study Registration Dates

First Submitted

September 25, 2014

First Submitted That Met QC Criteria

September 25, 2014

First Posted (Estimate)

September 29, 2014

Study Record Updates

Last Update Posted (Actual)

January 30, 2019

Last Update Submitted That Met QC Criteria

January 11, 2019

Last Verified

January 1, 2019

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 5172-067

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

http://engagezone.msd.com/doc/ProcedureAccessClinicalTrialData.pdf

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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