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
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Studientyp
Studientyp
Einschreibung (Tatsächlich)
Einschreibung
Phase
Phase
- Phase 3
Kontakte und Standorte
Studienorte
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Chai Wan, Hongkong
- Local Institution
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Pokfulham, Hongkong
- Local Institution
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Tai Po, Hongkong
- Local Institution
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Jakarta, Indonesien
- Local Institution
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Alberta
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Edmonton, Alberta, Kanada
- Local Institution
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British Columbia
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Vancouver, British Columbia, Kanada
- Local Institution
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Ontario
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Toronto, Ontario, Kanada
- Local Institution
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Cebu, Philippinen
- Local Institution
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Manila, Philippinen
- Local Institution
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Singapore, Singapur
- 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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California
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San Diego, California, Vereinigte Staaten
- Local Institution
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San Francisco, California, Vereinigte Staaten
- Local Institution
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Torrance, California, Vereinigte Staaten
- Local Institution
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Florida
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Miami, Florida, Vereinigte Staaten
- Local Institution
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North Miami Beach, Florida, Vereinigte Staaten
- Local Institution
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Maryland
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Baltimore, Maryland, Vereinigte Staaten
- Local Institution
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New York
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New York, New York, Vereinigte Staaten
- Local Institution
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New York, New York, Vereinigte Staaten
- Local Insitution
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Pennsylvania
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Philadelphia, Pennsylvania, Vereinigte Staaten
- Local Institution
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Texas
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Dallas, Texas, Vereinigte Staaten
- Local Institution
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Galveston, Texas, Vereinigte Staaten
- Local Institution
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Chronic hepatitis B treatment naive
- Compensated liver disease
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Keine (Offenes Etikett)
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
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Aktiver Komparator: A1
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Tablets, Oral, ETV 0.5 mg, once daily, up to 96 weeks
Andere Namen:
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Aktiver Komparator: A2
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Tablets, Oral, ADV 10 mg, once daily, up to 96 weeks
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Change From Baseline in Hepatitis B Virus DNA (HBV DNA) by Polymerase Chain Reaction (PCR) Assay at Week 12
Zeitfenster: 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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Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Change From Baseline in HBV DNA by PCR Assay at Week 48
Zeitfenster: 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)
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: Week 48
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Laboratory abnormalities reported as clinical AEs
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Week 48
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Publikationen und hilfreiche Links
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Studienbeginn
Primärer Abschluss (Tatsächlich)
Primärer Abschluss
Studienabschluss (Tatsächlich)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Schätzen)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Erkrankungen des Verdauungssystems
- Pathologische Prozesse
- RNA-Virusinfektionen
- Viruserkrankungen
- Durch Blut übertragene Infektionen
- Übertragbare Krankheiten
- Krankheitsattribute
- Leberkrankheiten
- Hepatitis, viral, menschlich
- Hepadnaviridae-Infektionen
- DNA-Virusinfektionen
- Enterovirus-Infektionen
- Picornaviridae-Infektionen
- Infektionen
- Hepatitis B
- Hepatitis
- Hepatitis A
- Hepatitis B, chronisch
- Hepatitis, chronisch
- Chronische Erkrankung
- Molekulare Mechanismen der pharmakologischen Wirkung
- Antiinfektiva
- Antivirale Mittel
- Reverse-Transkriptase-Inhibitoren
- Inhibitoren der Nukleinsäuresynthese
- Enzym-Inhibitoren
- Entecavir
- Adefovir
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- AI463-079
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