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Comparative Trial of Entecavir Versus Adefovir in the Treatment of Chronic Hepatitis B Infection

4. august 2010 opdateret af: Bristol-Myers Squibb

Randomized, Open-Label, Comparative Study to Evaluate Early Viral Load Reductions and Exploratory Viral Kinetics Following Administration of Entecavir or Adefovir in Nucleoside-Naive Adults With Chronic Hepatitis B Infection

The purpose of this study is to evaluate antiviral activity and efficacy of entecavir (ETV) compared to adefovir in adults with chronic hepatitis B who have not been treated yet with an antiviral medicine.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

69

Fase

  • Fase 3

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Canada
    • Alberta
      • Edmonton, Alberta, Canada
        • Local Institution
    • British Columbia
      • Vancouver, British Columbia, Canada
        • Local Institution
    • Ontario
      • Toronto, Ontario, Canada
        • Local Institution
  • Filippinerne
      • Cebu, Filippinerne
        • Local Institution
      • Manila, Filippinerne
        • Local Institution
  • Forenede Stater
    • California
      • San Diego, California, Forenede Stater
        • Local Institution
      • San Francisco, California, Forenede Stater
        • Local Institution
      • Torrance, California, Forenede Stater
        • Local Institution
    • Florida
      • Miami, Florida, Forenede Stater
        • Local Institution
      • North Miami Beach, Florida, Forenede Stater
        • Local Institution
    • Maryland
      • Baltimore, Maryland, Forenede Stater
        • Local Institution
    • New York
      • New York, New York, Forenede Stater
        • Local Institution
      • New York, New York, Forenede Stater
        • Local Insitution
    • Pennsylvania
      • Philadelphia, Pennsylvania, Forenede Stater
        • Local Institution
    • Texas
      • Dallas, Texas, Forenede Stater
        • Local Institution
      • Galveston, Texas, Forenede Stater
        • Local Institution
  • Hong Kong
      • Chai Wan, Hong Kong
        • Local Institution
      • Pokfulham, Hong Kong
        • Local Institution
      • Tai Po, Hong Kong
        • Local Institution
  • Indonesien
      • Jakarta, Indonesien
        • Local Institution
  • Singapore
      • Singapore, Singapore
        • Local Institution
  • Taiwan
      • Taichung, Taiwan
        • Local Institution
      • Taoyan, Taiwan
        • Local Institution
  • Thailand
      • Bankok, Thailand
        • Local Institution

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

16 år og ældre (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Chronic hepatitis B treatment naive
  • Compensated liver disease

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: A1
Medicin: entecavir
Tablets, Oral, ETV 0.5 mg, once daily, up to 96 weeks
Andre navne:
  • Baraclude
Aktiv komparator: A2
Medicin: adefovir
Tablets, Oral, ADV 10 mg, once daily, up to 96 weeks

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change From Baseline in Hepatitis B Virus DNA (HBV DNA) by Polymerase Chain Reaction (PCR) Assay at Week 12
Tidsramme: Baseline, Week 12
Antiviral efficacy, as measured by the mean reduction in serum HBV DNA levels by PCR (log10 copies/mL) at Week 12, adjusted for baseline (Week 12 - baseline). A negative value = improvement.
Baseline, Week 12

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change From Baseline in HBV DNA by PCR Assay at Week 48
Tidsramme: Baseline, Week 48
Antiviral efficacy, as measured by the mean reduction in serum HBV DNA levels by PCR (log10 copies/mL) at Week 48, adjusted for baseline (Week 48 - Baseline). A negative value = improvement.
Baseline, Week 48
Viral Load Undetectable (HBV DNA <300 Copies/mL)
Tidsramme: Week 48
Number of Subjects with HBV DNA <300 copies/mL by Roche COBAS® Amplicor (limit of quantitation 300 copies/mL)
Week 48
Alanine Aminotransferase (ALT) Normalization
Tidsramme: Week 48
Number of participants with ALT ≤ 1 x upper limit of normal (ULN)
Week 48
HBV DNA Viral Kinetics Estimates of Exponential Decay Model - Efficacy in Blocking Virus Production and de Novo Infections
Tidsramme: Week 12
The biphasic decline of HBV DNA is characterized via a 4-parameter exponential decay model previously published for HBV compounds. The model parameters of interest are the effectiveness of the drug in blocking virus production from infected cells (efficacy, ε) and effectiveness of the study treatment in blocking de novo infection of susceptible cells (η). The model parameters reflect the biphasic pattern that is typically observed after initiation of antiviral therapy. Parameters were estimated for each subject separately and then averaged within each treatment group.
Week 12
HBV DNA Viral Kinetics Estimates of Exponential Decay Model - Viral Clearance Rate and Infected Cell Death Rate
Tidsramme: Week 12
The biphasic decline of HBV DNA is characterized via a 4-parameter exponential decay model previously published for HBV compounds. The model parameters of interest are the clearance rate of the free virus (c), the death rate of productively infected cells (δ), The model parameters reflect the biphasic pattern that is typically observed after initiation of antiviral therapy. Parameters were estimated for each subject separately and then averaged within each treatment group.
Week 12
HBV DNA Viral Kinetics Estimates of Exponential Decay Model - Half-Life of Free Virus
Tidsramme: Week 12
The biphasic decline of HBV DNA is characterized via a 4-parameter exponential decay model previously published for HBV compounds. An important derived parameter is the half-life of free virus (ie, the average amount of time for HBV particles in plasma to be reduced to half the initial level), calculated as 24*ln(2)/c. The model parameters reflect the biphasic pattern that is typically observed after initiation of antiviral therapy. Parameters were estimated for each subject separately and then averaged within each treatment group.
Week 12
HBV DNA Viral Kinetics - Spline Model
Tidsramme: Week 12
This analysis uses a 3-parameter piece-wise linear model and describes the biphasic decline in HBV DNA (measured by PCR assay) through Week 12. The 3 parameters are the values for the 2 slopes, describing the first and second phase declines, respectively, and the estimated HBV DNA at the knot (at day 10; the time point where the 2 phases join). The biphasic viral decay kinetics for each treatment were obtained using a spline fitting procedure to estimate the 3 parameters for each subject; these estimates were then averaged within each treatment group.
Week 12
Summary of Safety - Most Frequent (> 10%) Adverse Events (AEs), Serious Adverse Events (SAEs), Discontinuations Due to AEs, and Deaths
Tidsramme: cumulative through the end of on-treatment observation as available at the time of the Week 48 dataset
AE=new untoward medical occurrence or worsening of pre-existing medical condition regardless of causal relationship to treatment. SAE=untoward medical occurrence that is life-threatening, a congenital anomaly/birth defect, or an important medical event, or results in death, inpatient hospitalization/prolongation of hospitalization, or persistent/significant disability. AE grades: mild (1), moderate (2), severe (3), life-threatening (4), death (5). ALT flare= >2x baseline & >10x ULN up to end of therapy + 5 days. Hepatic SAE=SAEs consistent with worsening of hepatitis or hepatic decompensation.
cumulative through the end of on-treatment observation as available at the time of the Week 48 dataset
Summary of Safety - Laboratory Abnormalities Reported as Clinical AEs
Tidsramme: Week 48
Laboratory abnormalities reported as clinical AEs
Week 48

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Bristol-Myers Squibb

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. december 2004

Primær færdiggørelse (Faktiske)

1. januar 2006

Studieafslutning (Faktiske)

1. april 2008

Datoer for studieregistrering

Først indsendt

15. november 2004

Først indsendt, der opfyldte QC-kriterier

15. november 2004

Først opslået (Skøn)

16. november 2004

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

10. august 2010

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

4. august 2010

Sidst verificeret

1. juni 2010

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • AI463-079

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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