Study of Efficacy and Safety of Grazoprevir (MK-5172)/Elbasvir (MK-8742) Combination Regimen for Treatment-Naïve Participants With Chronic Hepatitis C Virus Genotypes 1, 4, and 6 (MK-5172-060)

September 3, 2018 updated by: Merck Sharp & Dohme LLC

A Phase III Randomized Clinical Trial to Study the Efficacy and Safety of the Combination Regimen of MK-5172/MK-8742 in Treatment-Naïve Subjects With Chronic HCV GT1, GT4, and GT6 Infection.

This was an efficacy and safety study of grazoprevir (MK-5172) in combination with elbasvir (MK-8742) in treatment-naive participants with chronic hepatitis C virus (HCV) genotype (GT) 1, 4, or 6 infection. Participants were randomly assigned (3:1 ratio) to immediate treatment or deferred treatment (placebo control). The primary efficacy hypothesis was that the proportion of participants receiving combination therapy in the Immediate Treatment Arm who achieve sustained viral response at 12 weeks after the end of study treatment (SVR12) is superior to 73%.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

421

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:

  • Documented chronic HCV GT1, GT4, or GT6 with no evidence of non-typeable or mixed genotype infection (positive for anti-HCV antibody, HCV RNA, or any of the listed GTs at least 6 months prior to screening must be confirmed by screening lab results)
  • Cirrhosis defined by: liver biopsy showing cirrhosis METAVIR F4; or Fibroscan showing cirrhosis with a result of >12.5 kiloPascals (kPa); or FibroSure® (Fibrotest®) score of >0.75 and an aspartate aminotransferase (AST): platelet ratio index (APRI) of >2
  • Absence of cirrhosis defined by: liver biopsy showing absence of cirrhosis, or Fibroscan with a result of ≤12.5 kPa, or Fibrosure® (Fibrotest®) score of <= 0.48 and APRI of <=1
  • HCV treatment status of treatment naïve (naïve to all anti-HCV treatment) and can also be ineligible to take pegylated interferon
  • Female participant not of reproductive potential, or female of reproductive potential and agrees to avoid becoming pregnant while receiving study drug and for 14 days after the last dose of study drug (using abstinence or acceptable methods of contraception)

Exclusion criteria:

  • Evidence of decompensated liver disease manifested by the presence of or history of ascites, esophageal or gastric variceal bleeding, hepatic encephalopathy or other signs or symptoms of advanced liver disease. For cirrhotics, participants who are Child-Pugh Class B or C or who have a Pugh-Turcotte (CPT) score >6
  • Co-infection with hepatitis B virus or human immunodeficiency virus (HIV)
  • History of malignancy <=5 years prior to signing informed consent except for adequately treated basal cell or squamous cell skin cancer or in situ cervical cancer or carcinoma in situ; or is under evaluation for other active or suspected malignancy
  • Evidence of hepatocellular carcinoma (HCC) or under evaluation for HCC
  • Currently participating or has participated in a study with an investigational compound within 30 days of signing informed consent and is not willing to refrain from participating in another such study during the course of this study
  • Clinically-relevant drug or alcohol abuse within 12 months of screening
  • Pregnant, breast-feeding, or expecting to conceive or donate eggs from Day 1 throughout treatment and 14 days after the last dose of study medication or longer if dictated by local regulations
  • Organ transplant (including hematopoietic stem cell transplants) other than cornea and hair
  • Poor venous access
  • History of gastric surgery (e.g., stapling, bypass) or history of malabsorption disorder (e.g., celiac sprue disease)
  • Any medical condition requiring, or likely to require, chronic systemic administration of corticosteroids, TNF antagonists, or other immunosuppressant drugs during the course of the trial
  • Evidence of history of chronic hepatitis not caused by HCV, including but not limited to nonalcoholic steatohepatitis (NASH), drug-induced hepatitis, and autoimmune hepatitis

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
Participants received blinded grazoprevir 100 mg / elbasvir 50 mg fixed-dose combination (FDC) tablet orally once daily for 12 weeks followed by a 24-week follow-up period
Drug: Grazoprevir 100mg / Elbasvir 50 mg FDC
Placebo Comparator: Deferred Treatment Group
Participants received blinded placebo tablet orally once daily for 12 weeks; after a 4-week unblinding/washout period participants received open label grazoprevir 100 mg / elbasvir 50 mg FDC tablet orally once daily for 12 weeks. Follow-up was continued for an additional 24 weeks.
Drug: Grazoprevir 100mg / Elbasvir 50 mg FDC
Drug: Placebo to Grazoprevir / Elbasvir 50 mg FDC

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants Achieving Sustained Virologic Response at 12 Weeks After the End of Treatment (SVR12)
Time Frame: Week 24 (12 weeks after the end of treatment)
Hepatitis C Virus (HCV) ribonucleic acid (RNA) was measured using the Roche COBAS® Taqman® HCV Test, v2.0 assay. SVR12 was defined as HCV RNA <Lower Limit of Quantification (<15 IU/mL) 12 weeks after the end of all study therapy.
Week 24 (12 weeks after the end of treatment)
Percentage of Participants Experiencing at Least One Adverse Event
Time Frame: Up to Week 14 (14 days after the Blinded Treatment was completed)
An adverse event is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. An adverse event can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding), 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 preexisting condition that is temporally associated with the use of the Sponsor's product, is also an adverse event.
Up to Week 14 (14 days after the Blinded Treatment was completed)
Percentage of Participants Discontinued From Study Treatment Because of an Adverse Event
Time Frame: Up to Week 12 (end of Blinded Treatment)
An adverse event is defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. An adverse event can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding), 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 preexisting condition that is temporally associated with the use of the Sponsor's product, is also an adverse event.
Up to Week 12 (end of Blinded Treatment)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants Achieving Sustained Virologic Response at 24 Weeks After the End of Treatment (SVR24)
Time Frame: Week 36 (24 weeks after the end of treatment)
Hepatitis C Virus RNA was measured using the Roche COBAS® Taqman® HCV Test, v2.0 assay. SVR24 was defined as HCV RNA <Lower Limit of Quantitation (<15 IU/mL) 24 weeks after the end of all study therapy.
Week 36 (24 weeks after the end of treatment)

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Participants Achieving Sustained Virologic Response at 4 Weeks After the End of Treatment (SVR4)
Time Frame: Week 16 (4 weeks after the end of treatment)
Hepatitis C Virus RNA was measured using the Roche COBAS® Taqman® HCV Test, v2.0 assay. SVR4 was defined as HCV RNA <Lower Limit of Quantitation (<15 IU/mL) 4 weeks after the end of all study therapy.
Week 16 (4 weeks after the end of treatment)

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)

June 5, 2014

Primary Completion (Actual)

February 26, 2015

Study Completion (Actual)

September 6, 2015

Study Registration Dates

First Submitted

April 2, 2014

First Submitted That Met QC Criteria

April 2, 2014

First Posted (Estimate)

April 7, 2014

Study Record Updates

Last Update Posted (Actual)

October 2, 2018

Last Update Submitted That Met QC Criteria

September 3, 2018

Last Verified

September 1, 2018

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 5172-060
  • 2014-000137-22 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

https://www.merck.com/clinical-trials/pdf/ProcedureAccessClinicalTrialData.pdf

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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