Telbivudine Versus Entecavir in Reducing Serum HBsAg Levels in Patients With HBeAg-positive Chronic Hepatitis B (TERESA)

This study is currently recruiting participants. (see Contacts and Locations)
Verified January 2014 by Asan Medical Center
Sponsor:
Information provided by (Responsible Party):
Young-Suk Lim, Asan Medical Center
ClinicalTrials.gov Identifier:
NCT01595685
First received: May 8, 2012
Last updated: January 15, 2014
Last verified: January 2014

May 8, 2012
January 15, 2014
May 2012
December 2014   (final data collection date for primary outcome measure)
HBsAg titer at 48 weeks [ Time Frame: at 48 weeks ] [ Designated as safety issue: No ]
Same as current
Complete list of historical versions of study NCT01595685 on ClinicalTrials.gov Archive Site
  • Proportion of patients with serum HBsAg decline of ≥0.5 log10 IU/mL and <1.0 log10 IU/mL [ Time Frame: at 48 weeks of treatment ] [ Designated as safety issue: No ]
  • Proportion of patients with serum HBsAg decline greater than 1.0 log10 IU/mL [ Time Frame: at 48 weeks of treatment ] [ Designated as safety issue: No ]
  • Proportion of patients with serum HBsAg loss [ Time Frame: at 48 weeks of treatment ] [ Designated as safety issue: No ]
  • Proportion of patients with serum HBeAg loss or HBeAg seroconversion [ Time Frame: at 48 weeks of treatment ] [ Designated as safety issue: No ]
  • Proportion of patients with virologic rebound or genotypic resistance [ Time Frame: up to 48 weeks of treatment ] [ Designated as safety issue: Yes ]
  • Proportion of patients with normal ALT [ Time Frame: at 48 weeks of treatment ] [ Designated as safety issue: No ]
  • Adverse events: Creatine kinase level, GFR, Muscle events, Other AEs [ Time Frame: up to 48 weeks of treatment ] [ Designated as safety issue: Yes ]
Same as current
Not Provided
Not Provided
 
Telbivudine Versus Entecavir in Reducing Serum HBsAg Levels in Patients With HBeAg-positive Chronic Hepatitis B
A Randomized, Open-label Trial Comparing Telbivudine vs, Entecavir in Reducing Serum HBsAg Levels in Patients With HBeAg-positive Chronic Hepatitis B Who Have Achieved Serum HBV DNA Undetectability by Preceding Entecavir Treatment

The goal of chronic hepatitis B (CHB) treatment is complete and permanent eradication of hepatitis B virus (HBV) from patient's body, which is best represented by serum HBsAg loss accompanied by undetectable serum HBV DNA level.

While the most recently approved nucleos(t)ide analogues (NA) have marked antiviral potency and can induce HBV DNA undetectability in the majority of patients through prolonged treatment, NA need to be given long term, almost indefinitely, in most cases because they suppress HBV DNA only during therapy. For example, even after HBeAg-loss by a potent NA, suppression of serum HBV DNA to undetectable level is sustained only in about 23%-37% at 24 weeks off treatment. Thus, continuous therapy with NA until HBsAg clearance remains necessary in a majority of cases.

The recent availability of commercial quantitative assays of serum hepatitis B surface antigen (HBsAg) has enabled quantitative HBsAg to be used as a biomarker for prognosis and treatment response in CHB. It has been suggested that HBsAg decline during lamivudine or entecavir therapy is slower and less pronounced compared to interferon treatment, despite a higher effect on HBV DNA suppression. Based on HBsAg kinetics, it has been estimated that the predicted median time to HBsAg loss in patients treated with lamivudine or entecavir is more than 30 years. Thus, treatment that can induce rapid decline of HBsAg would have clear advantage in reducing the treatment duration required to achieve HBsAg-loss.

Interestingly, in a recent preliminary study, 24-weeks of treatment with telbivudine has induced HBsAg decline as comparable to pegylated interferon treatment. Although there has been no head-to-head trial comparing NAs in inducing HBsAg decline, previous studies consistently suggested that the decline of HBsAg is greater during telbivudine treatment compared with lamivudine or entecavir.

Thus, in this clinical trial, the investigators will investigate whether telbivudine is more effective in inducing HBsAg decline compared with entecavir in HBeAg-positive CHB patients who have achieved undetectable serum HBV DNA by preceding entecavir treatment.

A single-center randomized active-controlled open-label superiority trial

  • Patients will be randomly assigned 1:1 to receive telbivudine (600 mg/day) or ongoing entecavir (0.5 mg/day) for 48 weeks.
  • Eligible patients will be randomized using blocks of permuted treatment assignments after stratification by HBsAg level (1,000 IU/mL-5,000 IU/mL and ≥5,000 IU/mL IU/mL) and by entecavir treatment duration (1 year-2 year, ≥2 year).
  • Because over 98% of Korean patients with CHB have HBV genotype C,9 HBV genotype will not determined or be regarded as a stratification factor.
  • There will be no interruption in entecavir therapy before randomization.
  • Patients' treatment information will be retrospectively collected during entecavir treatment phase as well (DNA change, HBeAg status, HBsAg titre, ALT, and treatment duration. etc)
  • Patients will be screened within 4 weeks before randomization to determine study eligibility.
Interventional
Phase 3
Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Chronic Viral Hepatitis B Without Delta-agent
  • Drug: Telbivudine
    Telbivudine 600 mg Daily Oral
    Other Name: Sebivo
  • Drug: Entecavir
    Entecavir 0.5 mg Daily Oral
    Other Name: Baraclude
  • Experimental: Telbivudine
    Telbivudine 600 mg Daily Oral
    Intervention: Drug: Telbivudine
  • Active Comparator: Entecavir
    Entecavir 0.5 mg Daily Oral
    Intervention: Drug: Entecavir
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruiting
184
December 2014
December 2014   (final data collection date for primary outcome measure)

Inclusion Criteria: All of below

  • HBsAg titer > 1,000 IU/mL
  • HBeAg positive at study entry and at the baseline of ETV treatment
  • HBV DNA undetectable (<15 IU/mL) at least 2 occasions of more than 3 months apart
  • Treatment with entecavir (0.5 mg/day) for more than 1 year
  • Patient is ambulatory.
  • Patient is able and willing to give informed consent.

Exclusion Criteria: Any of below

  • Prior exposure to oral nucloes(t)ide analogue other than entecavir
  • Prior any exposure to interferon or pegylated interferon
  • Cirrhosis with Child-Pugh score ≥8
  • Hepatocellular carcinoma Identified or suspected
  • Other malignancy
  • Prior organ transplantation
  • Under immunosuppressive agent
  • Renal insufficiency (serum creatinine > 1.4)
  • Pregnant woman or willing to be pregnant woman or man
Both
18 Years to 80 Years
No
Contact: Young-Suk Lim, M.D., Ph.D. +82-2-3010-5933 limys@amc.seoul.kr
Korea, Republic of
 
NCT01595685
AMC2012-0201
No
Young-Suk Lim, Asan Medical Center
Asan Medical Center
Not Provided
Principal Investigator: Young-Suk Lim, M.D., Ph.D. Asan Medical Center
Asan Medical Center
January 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP