Sofosbuvir With Peginterferon Alfa 2a and Ribavirin for 12 Weeks in Treatment-Naïve Subjects With Chronic Genotype 1, 4, 5, or 6 HCV Infection (NEUTRINO)

This study has been completed.
Information provided by (Responsible Party):
Gilead Sciences Identifier:
First received: July 9, 2012
Last updated: August 27, 2013
Last verified: August 2013

This study is to assess whether sofosbuvir in combination with ribavirin (RBV) and Peginterferon Alfa 2a (PEG) administered for 12 weeks is safe and effective in patients with Hepatitis C (HCV) genotypes 1, 4, 5 , or 6 (GT-1, GT-4, GT-5, or GT-6) as assessed by the rate of sustained viral response (SVR) 12 weeks after discontinuation of therapy (SVR)12.

Condition Intervention Phase
Chronic Hepatitis C
Drug: Sofosbuvir
Drug: RBV
Drug: PEG
Phase 3

Study Type: Interventional
Study Design: Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Phase 3, Multicenter, Open-Label Study to Investigate the Efficacy and Safety of GS-7977 With Peginterferon Alfa 2a and Ribavirin for 12 Weeks in Treatment-Naïve Subjects With Chronic Genotype 1, 4, 5, or 6 HCV Infection

Resource links provided by NLM:

Further study details as provided by Gilead Sciences:

Primary Outcome Measures:
  • Efficacy 12 weeks post dosing [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
    The proportion of patients with a sustained virologic response (SVR) 12 weeks after the end of treatment

  • The safety and tolerability of sofosbuvir+RBV+PEG when given for 12 weeks [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
    The safety and tolerability of sofosbuvir+PEG+RBV as assessed by review of the accumulated safety data

Secondary Outcome Measures:
  • Efficacy 4 and 24 weeks post dosing [ Time Frame: 4 weeks and 24 weeks ] [ Designated as safety issue: No ]
    To determine the proportion of subjects who attain SVR at 4 and 24 weeks after discontinuation of therapy (SVR4 and SVR24)

  • Amount of circulating HCV RNA [ Time Frame: 12 weeks post dosing ] [ Designated as safety issue: No ]
    To evaluate the kinetics of circulating HCV RNA during treatment and after treatment discontinuation

  • Characterization of viral resistance [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
    To evaluate the emergence of viral resistance to sofosbuvir during treatment and after treatment discontinuation

Enrollment: 328
Study Start Date: June 2012
Study Completion Date: April 2013
Primary Completion Date: April 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Sofosbuvir+PEG+RBV Drug: Sofosbuvir
Sofosbuvir 400 mg tablet administered orally once daily
Other Names:
  • GS-7977
  • PSI-7977
Drug: RBV
Ribavirin (RBV) tablets administered orally in a divided daily dose according to package insert weight-based dosing recommendations (< 75kg = 1000 mg and ≥ 75 kg = 1200 mg)
Drug: PEG
Pegylated interferon alfa-2a (PEG) 180 μg administered once weekly by subcutaneous injection


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Infection with HCV GT 1, 4, 5, or 6
  • Cirrhosis determination
  • Subject meets the following classifications:Treatment-Naïve
  • Screening laboratory values within defined thresholds
  • Subject has not been treated with any investigational drug or device within 30 days of the Screening visit
  • Use of highly effective contraception methods if female of childbearing potential or sexually active male

Exclusion Criteria:

  • Prior exposure to an direct-acting antiviral targeting the HCV nonstructural protein (NS)5B polymerase
  • Pregnant or nursing female or male with pregnant female partner
  • Current or prior history of clinical hepatic decompensation
  • History of clinically-significant illness or any other major medical disorder that may interfere with subject treatment, assessment or compliance with the protocol
  • Excessive alcohol ingestion or significant drug abuse
  Contacts and Locations
Please refer to this study by its identifier: NCT01641640

  Show 56 Study Locations
Sponsors and Collaborators
Gilead Sciences
  More Information

No publications provided by Gilead Sciences

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Gilead Sciences Identifier: NCT01641640     History of Changes
Other Study ID Numbers: GS-US-334-0110
Study First Received: July 9, 2012
Last Updated: August 27, 2013
Health Authority: United States: Food and Drug Administration

Keywords provided by Gilead Sciences:
HCV genotype 1 (GT-1)
HCV genotype 4 (GT-4)
HCV genotype 5 (GT-5)
HCV genotype 6 (GT-6)
Sustained Virologic Response
Direct Acting Antiviral
Combination Therapy
Peginterferon Alfa 2a

Additional relevant MeSH terms:
Hepatitis A
Hepatitis, Chronic
Hepatitis C
Hepatitis C, Chronic
Liver Diseases
Digestive System Diseases
Hepatitis, Viral, Human
Virus Diseases
Enterovirus Infections
Picornaviridae Infections
RNA Virus Infections
Flaviviridae Infections
Peginterferon alfa-2a
Antiviral Agents
Anti-Infective Agents
Therapeutic Uses
Pharmacologic Actions
Molecular Mechanisms of Pharmacological Action
Immunologic Factors
Physiological Effects of Drugs processed this record on April 17, 2014