The Effect of Entecavir Consolidation on Post-TDF Treatment Durability

October 14, 2017 updated by: vghtpe user, Taipei Veterans General Hospital, Taiwan
Clinical relapse occurred much earlier and tended to be more severe after cessation of TDF than ETV. The follow-up interval and intensity would be different between ETV and TDF after discontinuation of therapy. Whether switch therapy from TDF to ETV can modify the pattern of relapse is interesting but unclear. Our hypothesis is that entecavir consolidation on post-TDF treatment patients reduce and delay the clinical relapse effectively. Hence in this proof of concept study we would like to evaluate the effect of 6 months and 12 months of entecavir consolidation on post-TDF treatment durability.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Unknown

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Long term nucleoside/nucleotide analogues (NAs) treatment is required in the treatment of chronic hepatitis B (CHB). According to current treatment guidelines from APASL 2015, NAs treatment can be stopped if, after HBsAg loss following either anti-HBs seroconversion or at least 12 months of a post-HBsAg clearance consolidation period or after treatment for at least 2 years with undetectable HBV DNA documented on three separate occasions, 6 months apart. In Taiwan, the National Health Insurance system only reimburse 3 years NAs for CHB patients. Previous study from Jeng et al. suggested that the 1-year rate of clinical relapse (HBV DNA>2,000 IU/mL plus ALT>2X ULN) after cessation of entecavir(ETV) therapy by APASL stopping rule (treatment >2 years, HBV DNA undetectable >1 year) in HBeAg-negative chronic hepatitis B(CHB) patients was 45%, of which 25.6% occurred within 6 months. Recently, another study from Jeng et al showed that 34 HBeAg(-) patients who stopped TDF therapy by APASL stopping rule were followed-up every 1-3 months for >6 months. Of these 34 patients, mean age was 51.8 years, 82.4% were males and 14(41.2%) were cirrhotic. The 1-year cumulative clinical relapse rate was 46%, of which 93.3% occurred within 6 months, and 13.3% developed decompensation. Clinical relapse occurred much earlier and tended to be more severe after cessation of TDF than ETV. The follow-up interval and intensity would be different between ETV and TDF after discontinuation of therapy. Whether switch therapy from TDF to ETV can modify the pattern of relapse is interesting but unclear. Our hypothesis is that entecavir consolidation on post-TDF treatment patients reduce and delay the clinical relapse effectively. Hence in this proof of concept study we would like to evaluate the effect of 6 months and 12 months of entecavir consolidation on post-TDF treatment durability.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
156

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

20 years and older (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • >20 yrs old.
  • No history of Lamivudine or telbivudine resistance.
  • HBsAg positive for more than 6 months.
  • HBeAg (-).
  • HBeAg-negative CHB under TDF treatment for mora than 2 years and fulfilled APASL 2012 guideline's stopping rule: HBeAg (-): undetectable HBV DNA on 3 separate occasions at least 6 months apart.

Exclusion Criteria:

  • Lamivudine/telbivudine resistance.
  • HBeAg (+).
  • HIV, HCV co-infection.
  • Under immunosuppressant treatment (including steroid and biologics).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: OTHER
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: NONE

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
ACTIVE_COMPARATOR: Arm 1
0.5mg Entecavir QD for 6 months after cessation of TDF and clinical observation for up to 6 months after the end of study follow-up.
Drug: 0.5mg Baraclude(entecavir)
0.5mg Baraclude (entecavir) QD for 6 months after cessation of TDF.
Drug: 0.5mg Baraclude(entecavir)
0.5mg Baraclude (entecavir) QD for 12 month after cessation of TDF.
ACTIVE_COMPARATOR: Arm 2
0.5mg Entecavir QD for 12 months after cessation of TDF and clinical observation for up to 6 months after the end of study follow-up.
Drug: 0.5mg Baraclude(entecavir)
0.5mg Baraclude (entecavir) QD for 6 months after cessation of TDF.
Drug: 0.5mg Baraclude(entecavir)
0.5mg Baraclude (entecavir) QD for 12 month after cessation of TDF.
NO_INTERVENTION: Arm 3
No consolidation arm and observation only and clinical observation for up to 6 months after the end of study follow-up.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Clinical relapse rate.
Time Frame: Up to 24 months.
Clinical relapse rate (HBV DNA>2000 IU/ml and ALT> 2x ULN) within 6 months after cessation of TDF or ETV consolidation treatment (up to 6 or 12 months on post-TDF therapy).
Up to 24 months.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Severity of ATL flare
Time Frame: Up to 24 months.
Severity of ATL flare (ALT>5X and 10X) within 6 months after cessation of TDF or ETV consolidation treatment (up to 6 or 12 months on post-TDF therapy).
Up to 24 months.
Liver decompensation incidence
Time Frame: Up to 24 months.
Liver decompensation incidence (Total bilirubin > 2mg/dl and/or PT prolongation> 3 sec) within 6 months after cessation of TDF or ETV consolidation treatment (up to 6 or 12 months on post-TDF therapy).
Up to 24 months.
Renal function changes
Time Frame: Up to 24 months.
Renal function changes based on eGFR (monitor per 3m) within 6 months after cessation of TDF or ETV consolidation treatment (up to 6 or 12 months on post-TDF therapy).
Up to 24 months.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Taipei Veterans General Hospital, Taiwan

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
China Medical University Hospital
Chang Gung Memorial Hospital
Changhua Christian Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ANTICIPATED)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 1, 2017

Primary Completion (ANTICIPATED)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
July 1, 2019

Study Completion (ANTICIPATED)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 30, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 5, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 11, 2017

First Posted (ACTUAL)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 13, 2017

Study Record Updates

Last Update Posted (ACTUAL)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 17, 2017

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 14, 2017

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • AI463-527

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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