Skip to main content
OpenTrials
Completed

NCT Number: NCT01604850

Sofosbuvir + Ribavirin for 12 or 16 Weeks in Treatment Experienced Subjects With Chronic Genotype 2 or 3 HCV Infection (FUSION)

This study was to assess the safety and efficacy of sofosbuvir in combination with ribavirin (RBV) administered for 12 or 16 weeks in participants with genotypes 2 or 3 hepatitis C virus (HCV) infection as assessed by the proportion of participants with sustained virologic response (SVR) 12 weeks after discontinuation of therapy (SVR12).

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Chronic Hepatitis C Blood-Borne Infections Chronic Disease Communicable Diseases Digestive System Diseases Disease Attributes Flaviviridae Infections Hepatitis Hepatitis C Hepatitis C, Chronic Hepatitis, Chronic Hepatitis, Viral, Human Infections Liver Diseases Pathologic Processes Pathological Conditions, Signs and Symptoms RNA Virus Infections Virus Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

University of Calgary, Calgary, Alberta, Canada

Loading trial locations.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Infection with HCV genotype 2 or 3
  • Had cirrhosis determination
  • Prior treatment failure
  • Screening laboratory values within defined thresholds
  • Subject had 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 have interfered with subject treatment, assessment or compliance with the protocol
  • Excessive alcohol ingestion or significant drug abuse

Treatment and study plan

SOF

Drug

Sofosbuvir (SOF) 400 mg tablet was administered orally once daily.

Other names: Sovaldi®, GS-7977, PSI-7977

RBV

Drug

Ribavirin (RBV) tablets was administered orally in a divided daily dose according to package insert weight-based dosing recommendations (< 75kg = 1000 mg and ≥ 75 kg = 1200 mg).

Placebo to match SOF

Drug

Placebo to match SOF was administered orally once daily.

Placebo to match RBV

Drug

Placebo to match RBV was administered orally twice daily.

Primary outcomes

  1. Percentage of Participants Achieving SVR12

    Time frame: Posttreatment Week 12

    SVR12 was defined as HCV RNA < the lower limit of quantitation (LLOQ, ie, < 25 IU/mL) 12 weeks after cessation of therapy.

    For the purposes of this efficacy analysis, the posttreatment period began after the end of active treatment (following Week 12 for the SOF+RBV+placebo arm, and Week 16 for the SOF+RBV arm).

  2. Adverse Events Leading to Permanent Discontinuation of Study Drug

    Time frame: Baseline to Week 16

    Adverse events which led to permanent discontinuation of study drug may or may not have been related to study treatment.

Secondary outcomes

  1. Percentage of Participants Achieving SVR4

    Time frame: Posttreatment Week 4

    SVR4 was defined as HCV RNA < LLOQ 4 weeks after cessation of therapy.

    For the purposes of this efficacy analysis, the posttreatment period began after the end of active treatment (following Week 12 for the SOF+RBV+placebo arm, and Week 16 for the SOF+RBV arm).

  2. Percentage of Participants Achieving SVR24

    Time frame: Posttreatment Week 24

    SVR24 was defined as HCV RNA < LLOQ 24 weeks after cessation of therapy.

    For the purposes of this efficacy analysis, the posttreatment period began after the end of active treatment (following Week 12 for the SOF+RBV+placebo arm, and Week 16 for the SOF+RBV arm).

  3. Percentage of Participants With Viral Breakthrough

    Time frame: Up to 16 weeks

    Viral breakthrough was defined as HCV RNA ≥ LLOQ after having previously had HCV RNA < LLOQ while receiving treatment, confirmed with 2 consecutive values (second confirmation value could be posttreatment), or last available on-treatment measurement with no subsequent follow-up values.

    For the purposes of this efficacy analysis, assessments were made during active treatment (up to Week 12 for the SOF+RBV+placebo arm, and Week 16 for the SOF+RBV arm).

  4. Percentage of Participants With Viral Relapse

    Time frame: End of treatment to posttreatment Week 24

    Viral relapse was defined as HCV RNA ≥ LLOQ during the posttreatment period having achieved HCV RNA < LLOQ at end of treatment, confirmed with 2 consecutive values or last available posttreatment measurement.

    For the purposes of this efficacy analysis, the posttreatment period began after the end of active treatment (following Week 12 for the SOF+RBV+placebo arm, and Week 16 for the SOF+RBV arm).

Sponsors and collaborators

Lead sponsor

Gilead Sciences

Industry

Registry information

Official study title

A Phase 3, Multicenter, Randomized, Double-Blind, Study to Investigate the Efficacy and Safety of GS-7977 + Ribavirin for 12 or 16 Weeks in Treatment Experienced Subjects With Chronic Genotype 2 or 3 HCV Infection

Acronym: FUSION

Important dates

Study start
2012
Primary completion
2013
Study completion
2013
First posted
May 24, 2012
Registry last updated
May 28, 2014

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.