Comparative Trial of Entecavir Versus Adefovir in the Treatment of Chronic Hepatitis B Infection
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
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Fase 3
Kontakter og lokationer
Studiesteder
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Alberta
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Edmonton, Alberta, Canada
- Local Institution
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British Columbia
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Vancouver, British Columbia, Canada
- Local Institution
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Ontario
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Toronto, Ontario, Canada
- Local Institution
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Cebu, Filippinerne
- Local Institution
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Manila, Filippinerne
- Local Institution
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California
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San Diego, California, Forenede Stater
- Local Institution
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San Francisco, California, Forenede Stater
- Local Institution
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Torrance, California, Forenede Stater
- Local Institution
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Florida
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Miami, Florida, Forenede Stater
- Local Institution
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North Miami Beach, Florida, Forenede Stater
- Local Institution
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Maryland
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Baltimore, Maryland, Forenede Stater
- Local Institution
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New York
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New York, New York, Forenede Stater
- Local Institution
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New York, New York, Forenede Stater
- Local Insitution
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Pennsylvania
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Philadelphia, Pennsylvania, Forenede Stater
- Local Institution
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Texas
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Dallas, Texas, Forenede Stater
- Local Institution
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Galveston, Texas, Forenede Stater
- Local Institution
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Chai Wan, Hong Kong
- Local Institution
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Pokfulham, Hong Kong
- Local Institution
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Tai Po, Hong Kong
- Local Institution
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Jakarta, Indonesien
- Local Institution
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Singapore, Singapore
- Local Institution
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Taichung, Taiwan
- Local Institution
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Taoyan, Taiwan
- Local Institution
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Bankok, Thailand
- Local Institution
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Chronic hepatitis B treatment naive
- Compensated liver disease
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Aktiv komparator: A1
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Tablets, Oral, ETV 0.5 mg, once daily, up to 96 weeks
Andre navne:
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Aktiv komparator: A2
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Tablets, Oral, ADV 10 mg, once daily, up to 96 weeks
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Change From Baseline in Hepatitis B Virus DNA (HBV DNA) by Polymerase Chain Reaction (PCR) Assay at Week 12
Tidsramme: Baseline, Week 12
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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.
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Baseline, Week 12
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Change From Baseline in HBV DNA by PCR Assay at Week 48
Tidsramme: Baseline, Week 48
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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.
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Baseline, Week 48
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Viral Load Undetectable (HBV DNA <300 Copies/mL)
Tidsramme: Week 48
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Number of Subjects with HBV DNA <300 copies/mL by Roche COBAS® Amplicor (limit of quantitation 300 copies/mL)
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Week 48
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Alanine Aminotransferase (ALT) Normalization
Tidsramme: Week 48
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Number of participants with ALT ≤ 1 x upper limit of normal (ULN)
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Week 48
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HBV DNA Viral Kinetics Estimates of Exponential Decay Model - Efficacy in Blocking Virus Production and de Novo Infections
Tidsramme: Week 12
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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.
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Week 12
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HBV DNA Viral Kinetics Estimates of Exponential Decay Model - Viral Clearance Rate and Infected Cell Death Rate
Tidsramme: Week 12
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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.
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Week 12
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HBV DNA Viral Kinetics Estimates of Exponential Decay Model - Half-Life of Free Virus
Tidsramme: Week 12
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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.
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Week 12
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HBV DNA Viral Kinetics - Spline Model
Tidsramme: Week 12
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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.
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Week 12
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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
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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.
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cumulative through the end of on-treatment observation as available at the time of the Week 48 dataset
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Summary of Safety - Laboratory Abnormalities Reported as Clinical AEs
Tidsramme: Week 48
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Laboratory abnormalities reported as clinical AEs
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Week 48
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Sygdomme i fordøjelsessystemet
- Patologiske processer
- RNA-virusinfektioner
- Virussygdomme
- Blodbårne infektioner
- Overførbare sygdomme
- Sygdomsegenskaber
- Leversygdomme
- Hepatitis, viral, menneskelig
- Hepadnaviridae infektioner
- DNA-virusinfektioner
- Enterovirus infektioner
- Picornaviridae infektioner
- Infektioner
- Hepatitis B
- Hepatitis
- Hepatitis A
- Hepatitis B, kronisk
- Hepatitis, kronisk
- Kronisk sygdom
- Molekylære mekanismer for farmakologisk virkning
- Anti-infektionsmidler
- Antivirale midler
- Reverse transkriptasehæmmere
- Nukleinsyresyntesehæmmere
- Enzymhæmmere
- Entecavir
- Adefovir
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- AI463-079
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