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Completed

NCT Number: NCT00580801

An Exploratory Study of Telaprevir in Treatment-Naive Participants With Chronic Genotype 4 Hepatitis C Virus Infection

The purpose of this study is to evaluate the activity and safety of telaprevir on Hepatitis C Virus (HCV) Genotype 4, alone or in combination with standard therapy, that is, pegylated-interferon-alfa-2a and ribavirin in treatment-naive (never been treated before with antiretroviral therapy) participants.

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Key information

Conditions

Hepatitis C Blood-Borne Infections Communicable Diseases Digestive System Diseases Flaviviridae Infections Hepatitis Hepatitis, Viral, Human Infections Liver Diseases RNA Virus Infections Virus Diseases

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

About this study

This is a Phase 2a, partially-blind, randomized (study drug assigned by chance) and multiple-dose study to evaluate the activity and safety of telaprevir on HCV early viral kinetics in treatment-naive participants who are chronically infected with HCV Genotype 4. The study consists of 4 parts: Screening period (6-week); Investigational Treatment period (consisting of 2-week treatment with telaprevir or telaprevir+standard treatment or placebo); Standard Treatment period (consists of 46 or 48-week standard treatment); and Follow-up period (24-week). The activity of telaprevir will be evaluated by early viral kinetic parameters along with viral response and pharmacokinetic assessments during the investigational treatment phase. Participants' safety will be monitored throughout the study.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

- Participant has chronic Genotype 4 Hepatitis C infection

  • Plasma hepatitis C virus (HCV) ribonucleic acid (RNA) level greater than 10,000 International unit per milliliter (IU/mL) at Screening
  • Participant never received treatment for HCV
  • Participant was to be in good health (besides HCV infection), in the opinion of the Investigator, judged on the basis of medical history and physical examination (including vital signs and screening electrocardiogram [ECG]), with any chronic medical conditions under stable medical control
  • Participant had to be willing to refrain from the concomitant use of any medications or substances Exclusion Criteria: - Participants with history or evidence of cirrhosis or history of suspicion of alcohol, barbiturate, or amphetamine recreational or narcotic drug use, which in the Investigator's opinion would compromise the participant's safety and/or compliance with study procedures
  • Participant has human immunodeficiency virus (HIV) or hepatitis B virus (HBV) co-infection
  • Female participants who are pregnant, or planning to become pregnant, or breastfeeding, and partners of female participants who are pregnant or breastfeeding
  • Participant has hypersensitivity to tartrazine
  • Participant had participated in any clinical trial for an investigational drug within 90 days before drug administration or participated in more than 2 drug studies in the last 12 months

Treatment and study plan

Telaprevir

Drug

Telaprevir 750 milligram (mg) tablet will be administered three times a day orally for 2 weeks.

Pegylated-Interferon-alfa-2a

Drug

Pegylated-interferon-alfa-2a (180 microgram [mcg] subcutaneous injection, once weekly) will be administered from Week 1 to Week 48 or 50.

Placebo

Drug

Matching placebo tablet to telaprevir was administered three times a day orally for 2 weeks.

Ribavirin

Drug

Ribavirin (1000-1200 mg as oral tablet daily) will be administered from Week 1 to Week 48 or 50.

Primary outcomes

  1. Change From Baseline in Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) Levels at Day 15

    Time frame: Baseline and Day 15

    The plasma HCV RNA levels were used to assess the antiviral activity which included viral response as either undetectable HCV RNA (that is no HCV target was detected in the plasma sample) or less than 25 International unit per milliliter (IU/mL) of HCV RNA (that is Plasma sample contained HCV RNA at a concentration below the limit of quantification [LLOQ=25 IU/mL] of the viral load assay). Plasma HCV RNA levels were measured using the COBAS TaqMan HCV test Version 2.0. This assay used real-time reverse transcription-polymerase chain reaction (RT-PCR) methodology.

Secondary outcomes

  1. Percentage of Participants With Viral Response (Undetectable HCV RNA)

    Time frame: Day 15 up to EOT (Week 48/50 or early discontinuation)

    Viral response was either defined as having undetectable HCV RNA (that is, no HCV RNA was detected in the participants' plasma samples) or less than 25 IU/mL HCV RNA from Day 15 up to end of treatment (EOT), that is Week 48/50 or early discontinuation. In Week x/y, where, x represents time frame for Telaprevir+Pegylated-interferon-alfa-2a+Ribavirin and Placebo+Pegylated-interferon-alfa-2a+Ribavirin and; y represents time frame for Telaprevir and Pegylated-interferon-alfa-2a+Ribavirin treatment group.

  2. Median Time to First Viral Response (Undetectable HCV RNA)

    Time frame: Up to Week 48/50

    Time to first viral response (Undetectable HCV RNA) is defined as the number of days since the start of study medication until first time negative HCV RNA level that is less than 25 IU/mL was detected.

  3. Number of Participants With Viral Breakthrough (Detectable HCV RNA)

    Time frame: Day 8, Day 12, Day 15, Week 24/26 and Week 36/38

    Viral breakthrough was defined as having a confirmed increase greater than 1 log 10 in HCV RNA level from the lowest level reached, or a confirmed level of HCV RNA greater than 100 IU/mL in participants whose HCV RNA had previously become undetectable [less than 25 IU/mL]). In Week x/y, where, x represents time frame for Telaprevir+pegylated-interferon-alfa-2a+Ribavirin and Placebo+pegylated-interferon-alfa-2a+Ribavirin and y represents time frame for Telaprevir and then Pegylated-interferon-alfa-2a+Ribavirin treatment group.

  4. Percentage of Participants With Sustained Viral Response (SVR)

    Time frame: Week 12 and 24 after the last dose of study medication

    Sustained viral response was defined as having undetectable HCV RNA at EOT (Week 48/50 or early discontinuation) and no confirmed detectable HCV RNA levels between EOT and 12 weeks (SVR12) and 24 weeks (SVR24) after the last dose of study medication.

  5. Percentage of Participants With Relapse

    Time frame: Week 24 after EOT (Week 48/50 or early discontinuation)

    Relapse was defined as having confirmed detectable HCV RNA during the 24-week follow-up period in participants who had undetectable HCV RNA at EOT (Week 48/50 or early discontinuation). Participants who dropped out between 24-week follow-up after EOT were not evaluated for relapse.

  6. Area Under the Serum Concentration-Time Curve (AUC)

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6 and 8 hours post-dose on Day 1 and 15

    The AUC is a measure of the serum concentration-time curve, calculated by the lin-up/log-down method.

  7. Maximum Serum Concentration (Cmax) of Telaprevir

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6 and 8 hours post-dose on Day 1 and 15

    The Cmax is the maximum observed serum concentration, which was measured at Day 1 and 15 for telaprevir and then pegylated-interferon-alfa-2a+Ribavirin (reference) and telaprevir+pegylated-interferon-alfa-2a+Ribavirin (test).

  8. Pre-Dose Serum Concentration (C[0h]) of Telaprevir

    Time frame: 0 hour (pre-dose) at Day 15

    The C(0h) is the pre-dose serum concentration of telaprevir and then pegylated-interferon-alfa-2a+Ribavirin (reference) and telaprevir+pegylated-interferon-alfa-2a+Ribavirin (test).

  9. Minimum Serum Concentration (Cmin) of Telaprevir on Day 15

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6 and 8 hours post-dose on Day 15

    The Cmin is the minimum serum concentration between 0 hour and τ (τ=dosing interval) of telaprevir and then pegylated-interferon-alfa-2a+Ribavirin (reference) and telaprevir+pegylated-interferon-alfa-2a+Ribavirin (test). Cmin on Day 15 is reported here.

  10. Time to Reach the Maximum Serum Concentration (Tmax) of Telaprevir

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6 and 8 hours post-dose on Day 1 and 15

    The tmax is the time to reach maximum observed serum concentration of telaprevir and then pegylated-interferon-alfa-2a+Ribavirin (reference) and pegylated-interferon-alfa-2a+Ribavirin (test).

  11. Average Steady-State Serum Concentration (Css,av) of Telaprevir

    Time frame: Pre-dose, 0.5, 1, 2, 3, 4, 6 and 8 hours post-dose on Day 1 and 15

    The Average steady-state serum concentration (Css,av) was calculated by AUC/τ at steady-state (τ=dosing interval) of telaprevir and then pegylated-interferon-alfa-2a+Ribavirin (reference) and telaprevir+pegylated-interferon-alfa-2a+Ribavirin (test).

Sponsors and collaborators

Lead sponsor

Tibotec BVBA

Industry

Registry information

Official study title

A Phase IIa Randomized, Partially Blinded Trial of Telaprevir (VX-950) in Treatment-Naive Subjects With Chronic Genotype 4 Hepatitis C Infection

Important dates

Study start
2008
Primary completion
2010
Study completion
2010
First posted
Dec 27, 2007
Registry last updated
Sep 9, 2013

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.

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