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

4. august 2010 oppdatert av: 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.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Faktiske)

69

Fase

  • Fase 3

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

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

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

16 år og eldre (Barn, Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  • Chronic hepatitis B treatment naive
  • Compensated liver disease

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Aktiv komparator: A1
Legemiddel: entecavir
Tablets, Oral, ETV 0.5 mg, once daily, up to 96 weeks
Andre navn:
  • Baraclude
Aktiv komparator: A2
Legemiddel: adefovir
Tablets, Oral, ADV 10 mg, once daily, up to 96 weeks

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
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
Tiltaksbeskrivelse
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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Bristol-Myers Squibb

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. desember 2004

Primær fullføring (Faktiske)

1. januar 2006

Studiet fullført (Faktiske)

1. april 2008

Datoer for studieregistrering

Først innsendt

15. november 2004

Først innsendt som oppfylte QC-kriteriene

15. november 2004

Først lagt ut (Anslag)

16. november 2004

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

10. august 2010

Siste oppdatering sendt inn som oppfylte QC-kriteriene

4. august 2010

Sist bekreftet

1. juni 2010

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • AI463-079

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Kliniske studier på Hepatitt B

Kliniske studier på entecavir

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