Viral Kinetics Study of Telbivudine and Entecavir in Adults With Chronic Hepatitis B

This study has been completed.
Sponsor:
Collaborator:
Idenix Pharmaceuticals
Information provided by:
Novartis
ClinicalTrials.gov Identifier:
NCT00412529
First received: December 15, 2006
Last updated: July 18, 2011
Last verified: July 2011
  Purpose

This exploratory study is designed to determine the early viral kinetic profile during treatment with telbivudine or entecavir at multiple time points over 12 weeks.


Condition Intervention Phase
Hepatitis B
Chronic Hepatitis B
Drug: Entecavir
Drug: Telbivudine
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Randomized, Open-label, Controlled, Multicenter, Exploratory Trial to Characterize the Results of Daily Oral Administration of Telbivudine (LDT600) 600 mg or Entecavir (ETV) 0.5 mg Given Over 12 Weeks on the Kinetics of Hepatitis B Virus (HBV) DNA in Adults With HBeAg-positive, Compensated Chronic Hepatitis B (CHB)

Resource links provided by NLM:


Further study details as provided by Novartis:

Primary Outcome Measures:
  • Change in Mean Hepatitis B Virus (HBV) DNA Levels [ Time Frame: Baseline (day 1) to Week 12 (day 85) ] [ Designated as safety issue: No ]
    Baseline HBV DNA is defined as the last pre-dose assessment of HBV DNA.


Secondary Outcome Measures:
  • Change in Mean HBV DNA Level [ Time Frame: Baseline (day 1) to Weeks 2, 4, 8 ] [ Designated as safety issue: No ]
    Baseline HBV DNA is defined as the last pre-dose assessment of HBV DNA.HBV DNA reductions, considered as the repeated measures, from baseline to Weeks 2, 4, 8.

  • The Area Under the Curve (AUC) of HBV DNA Change. [ Time Frame: From Baseline to Week 12 ] [ Designated as safety issue: No ]
    In AUC efficacy analyses, all the visits from baseline to Week 12 visit (including the planned and the repeated) with a non-missing HBV DNA level were included.

  • Change in Alanine Aminotransferase (ALT) Levels [ Time Frame: From Baseline to Week 12 ] [ Designated as safety issue: No ]
  • Characterization of Very Early Viral Kinetics: Estimation of Viral Clearance [ Time Frame: Baseline to 12 weeks ] [ Designated as safety issue: No ]

    Viral kinetic parameters were estimated with a bi-phasic mathematical model:

    V(t) = (1-ε)pI(t) - cV(t)

    I(t) = (1- η)TV(t) - δI(t)

    V serum viral load, I productively infected cells, ε efficiency factor of blocking virus production, p viral production rate, c viral clearance rate, η efficiency factor of blocking de novo infection, β de novo infection rate, T uninfected target cells, δ rate of infected cell loss. Maximum-likelihood estimation for the viral kinetic parameters entailed fitting a nonlinear differential equation system via the least-squares approach from serum HBV DNA data.


  • Characterization of Very Early Viral Kinetics: Estimation of the Rate of Infected Cell Loss [ Time Frame: Baseline to 12 weeks ] [ Designated as safety issue: No ]

    Viral kinetic parameters were estimated with a bi-phasic mathematical model:

    V(t) = (1-ε)pI(t) - cV(t)

    I(t) = (1- η)TV(t) - δI(t)

    V serum viral load, I productively infected cells, ε efficiency factor of blocking virus production, p viral production rate, c viral clearance rate, η efficiency factor of blocking de novo infection, β de novo infection rate, T uninfected target cells, δ rate of infected cell loss. Maximum-likelihood estimation for the viral kinetic parameters entailed fitting a nonlinear differential equation system via the least-squares approach from serum HBV DNA data.


  • Characterization of Very Early Viral Kinetics: Estimation of the Efficiency Factor of Blocking Virus Production [ Time Frame: Baseline to 12 weeks ] [ Designated as safety issue: No ]
    Viral kinetic parameters were estimated with a bi-phasic mathematical model of HBV DNA by using compartments of free virus, infected cells, and uninfected target cells. The model parameter of interest was the effectiveness of the drug in blocking virus production from infected cells (efficacy, ε). Blocking efficiency was within the range between 0 and 1.

  • Number of Patients Who Are Polymerase Chain Reaction (PCR) Negative [ Time Frame: At Week 12 ] [ Designated as safety issue: No ]
    PCR negative was considered <300 copies/mL. PCR positive was considered =>300 copies/mL.


Enrollment: 44
Study Start Date: December 2006
Primary Completion Date: February 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Telbivudine Drug: Telbivudine
Telbivudine 600 mg once daily for 12 weeks.
Active Comparator: Entecavir Drug: Entecavir
Entecavir 0.5 mg once daily for 12 weeks.

  Eligibility

Ages Eligible for Study:   18 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Male or female, 18-70 years of age with documented compensated hepatitis B "e" antigen (HBeAg)-positive chronic hepatitis B
  • Able to comply with study regimen and provide written informed consent

Exclusion Criteria:

  • Pregnant or breastfeeding
  • Unwilling to use double barrier method of contraception
  • Co-infected with hepatitis C virus (HCV), hepatitis D virus (HDV) or human immunodeficiency virus (HIV)
  • Received Hepatitis B therapy in the past
  • Use of immunomodulatory therapy in past 12 months
  • History of or symptoms of hepatic decompensation or pancreatitis
  • Frequent or prolonged use of potentially hepatotoxic or nephrotoxic drugs
  • Concurrent medication likely to preclude compliance with schedule of evaluations
  • Use of other investigational drugs within 30 days of enrollment
  • Abnormal laboratory values during screening

Other protocol-defined inclusion/exclusion criteria may apply

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00412529

Locations
Korea, Republic of
Holy Family Hospital_Bucheon
Bucheon,Kyunggi, Korea, Republic of
Inje University Busan Paik Hospital
Busan, Korea, Republic of
Yeungnam University Medical Center
Daegu, Korea, Republic of
Gachon Univ. Gil Medical Center Hospital
Incheon, Korea, Republic of
Kangnam Sacred Heart Hospital
Seoul, Korea, Republic of
The Catholic University of Korea
Seoul, Korea, Republic of
Korea University Medical Center_Anam
Seoul, Korea, Republic of
Asan Medical Center
Seoul, Korea, Republic of
Sponsors and Collaborators
Novartis Pharmaceuticals
Idenix Pharmaceuticals
Investigators
Study Director: Novartis Pharmaceuticals Novartis Pharmaceuticals
  More Information

Additional Information:
Publications:
Responsible Party: External Affairs, Novartis Pharmaceuticals
ClinicalTrials.gov Identifier: NCT00412529     History of Changes
Other Study ID Numbers: CLDT600A2407
Study First Received: December 15, 2006
Results First Received: December 2, 2010
Last Updated: July 18, 2011
Health Authority: Korea: Food and Drug Administration
United States: Food and Drug Administration

Keywords provided by Novartis:
HBeAg-positive, chronic hepatitis B
telbivudine
entecavir
viral kinetics

Additional relevant MeSH terms:
Hepatitis
Hepatitis A
Hepatitis B, Chronic
Hepatitis, Chronic
Hepatitis B
Liver Diseases
Digestive System Diseases
Hepatitis, Viral, Human
Virus Diseases
Enterovirus Infections
Picornaviridae Infections
RNA Virus Infections
Hepadnaviridae Infections
DNA Virus Infections
Telbivudine
Entecavir
Antiviral Agents
Anti-Infective Agents
Therapeutic Uses
Pharmacologic Actions
Nucleic Acid Synthesis Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action

ClinicalTrials.gov processed this record on September 22, 2014