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Chronic Hepatitis BPhase 2NCT03780543

A Study of ABI-H0731 + Nucleos(t)Ide as Finite Treatment for Chronic Hepatitis B Patients

A Phase 2 study of Chronic Hepatitis B, run by Assembly Biosciences at 24 sites in 5 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

Open-label, extension study to evaluate the safety and efficacy of combination therapy and its effect on sustained viral response biomarkers. Read more about this study

Who is it for?
Ages 18 to 71 years
Conditions the study is for
Chronic Hepatitis B
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
92 participants
Where
24 sitesin 5 countries
Study dates
20 Dec 2018to 26 Apr 2021
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 71 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Willing and able to provide informed consent.
  • Previously enrolled on Study ABI-H0731-201 (NCT03576066) or ABI-H0731-202 (NCT03577171) and completed the treatment period, with demonstrated compliance in the opinion of the investigator.
  • Female subjects must agree to use an effective birth control method for the duration of the study and follow-up, or be surgically sterile for at least 6 months, or at least 2 years postmenopausal with serum follicle-stimulating hormone (FSH) levels consistent with a postmenopausal status. Effective birth control methods include male or female condom (may not be used together due to increased risk of breakage), vasectomy, intrauterine device (IUD), diaphragm, or cervical cap. Female subjects of childbearing potential must have a negative serum pregnancy test.
  • All heterosexually active male subjects must agree to use an effective birth control method for the duration of the study and follow-up. Effective birth control methods include male or female condom (may not be used together due to increased risk of breakage), vasectomy, hormone-based contraception (only female partner of a male subject), IUD, diaphragm, or cervical cap.
  • Agreement to adhere to Lifestyle Considerations (including abstaining from alcohol abuse [defined as alcohol consumption exceeding 2 standard drinks per day on average (1 standard drink = 10 grams of alcohol)] and the use of illicit substances, herbal or other substances, or unnecessary over-the-counter medications throughout study duration.
  • In good general health except for chronic HBV infection.
  • Have the ability to take oral medication and be willing to adhere to the ABI-H0731-211 regimen in the opinion of the Investigator.

Who cannot join

  • Must not have had evidence of HBV resistance-associated variants (RAVs) or lack of compliance on a previous study of ABI H0731.
  • Must not have had a treatment-emergent adverse event or laboratory abnormalities deemed clinically significant and possibly or probably related to drug while on a previous study of ABI-H0731, that in the opinion of the Investigator or the Sponsor makes the subject unsuitable for this study.
  • Current clinically significant cardiac or pulmonary disease, chronic or recurrent renal or urinary tract disease, liver disease other than HBV, endocrine disorder, autoimmune disorder, diabetes mellitus requiring treatment with insulin or hypoglycemic agents, neuromuscular, musculoskeletal, or mucocutaneous conditions requiring frequent treatment, seizure disorders requiring treatment, or other medical conditions requiring frequent medical management or pharmacologic or surgical treatment that in the opinion of the Investigator or the Sponsor makes the subject unsuitable for the study.
  • Females who are lactating or pregnant or wish to become pregnant within the duration of the ABI-H0731-211 study.

Trial locations and contacts

24 sites in 5 countries.

24 sites in 5 countries

United States17 sites
  • Johns Hopkins University School of Medicine

    Baltimore, Maryland, 21287

  • Cedars-Sinai Medical Center

    Beverly Hills, California, 90211

  • Digestive Disease Associates

    Catonsville, Maryland, 21228

  • Southern California Research Center

    Coronado, California, 92118

  • Sing Chan, MD

    Flushing, New York, 11355

  • Infectious Disease Care

    Hillsborough, New Jersey, 08844

  • Coalition of Inclusive Medicine

    Los Angeles, California, 90057

  • University of California Los Angeles

    Los Angeles, California, 90095

  • University of Miami Hospital and Clinics

    Miami, Florida, 33136

  • NYU Langone Health

    New York, New York, 10016

  • Icahn School of Medicine at Mount Sinai

    New York, New York, 10029

  • Thomas Jefferson University Hospital

    Philadelphia, Pennsylvania, 19107

  • Xiaoli Ma, MD

    Philadelphia, Pennsylvania, 19107

  • Research and Education

    San Diego, California, 92115

  • Medical Associates Research Group

    San Diego, California, 92123

  • Quest Clinical Research

    San Francisco, California, 94115

  • Stanford University Medical Center

    Stanford, California, 94305

Other trials in United States

Canada3 sites
  • Toronto Liver Center

    Toronto, Ontario, M6H 3M1

  • Toronto General Hospital

    Toronto, Ontario

  • GI Research Institute

    Vancouver, British Columbia, V6Z 2K5

Other trials in Canada

New Zealand2 sites
  • Auckland Clinical Studies

    Auckland

  • Waikato Hospital

    Hamilton

Other trials in New Zealand

Hong Kong1 site
  • University of Hong Kong, Queen Mary Hospital

    Hong Kong

Other trials in Hong Kong

United Kingdom1 site
  • King's College London

    London

Other trials in United Kingdom

About this study

Official title: A Multi-center, Open-label, Long-term Extension Study of ABI-H0731 + Nucleos(t)Ide as Finite Treatment for Chronic Hepatitis B Patients

Open-label, extension study to evaluate the safety and efficacy of combination therapy and its effect on sustained viral response biomarkers.

Read the detailed description

This is an open-label extension of parent studies ABI-H0731-201 (NCT03576066) and ABI-H0731-202 (NCT03577171). The extension study will assess the safety of long-term (up to 100 weeks of treatment in extension study ABI-H0731-211) combination therapy and its effect on biomarkers of sustained viral response (SVR) (NCT03780543).

Being tested
standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)
Keywords
CHB (chronic hepatitis B infection), HBV (hepatitis B virus), HBeAg positive (hepatitis B "e" antigen - positive), HBeAg negative (hepatitis B "e" antigen - negative), Hepatitis B (hepatitis B virus), Hepatitis B virus (HBV), SVR (sustained viral response)
Medical subject headings
Hepatitis B, Chronic, Hepatitis B

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)Drug

    Also called Entecavir (ETV) - brand name Baraclude, Tenofovir Disoproxil Fumarate (TDF) - brand name: Viread, Tenofovir Alafenamide (TAF) - brand name: Descovy

    Participants will continue on their SOC NrtI, Entecavir (ETV), Tenofovir Disoproxil Fumarate (TDF) or Tenofovir Alafenamide (TAF) tablet QD (once daily) orally as per approved package insert.

Study groups in NCT03780543
Study groupRoleWhat they receive
HBeAg-negative Subjects from Parent Study ABI-H0731-201Active comparatorSubjects who on Day 1 of parent study ABI-H0731-201 (NCT03576066) were standard of care (SOC) nucleos(t)ide (NrtI)-suppressed and HBeAg-negative will receive both ABI-H0731 + SOC NrtI for at least 52 weeks, after which time they will discontinue both ABI-H0731 and SOC NrtI and enter long-term off-treatment follow-up (FU) for up to 3 years.
Receives: Drug: standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)
HBeAg-positive Subjects from Parent Study ABI-H0731-201Active comparatorSubjects who on Day 1 of parent study ABI-H0731-201 (NCT03576066) were SOC NrtI-suppressed and HBeAg-positive will receive ABI-H0731 + SOC NrtI for at least 52 weeks, after which time their viral response will be evaluated. 1. Subjects who meet the virologic response criteria will discontinue both ABI-H0731 and SOC NrtI and enter long-term off-treatment follow-up (FU) for up to 3 years. 2. Subjects with insufficient virologic response will discontinue ABI-H0731 only and continue on SOC NrtI alone and followed-up for 12 weeks.
Receives: Drug: standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)
Subjects from Parent Study ABI-H0731-202Active comparatorSubjects who on Day 1 of parent study ABI-H0731-202 (NCT03577171) were treatment-naive and HBeAg-positive will receive ABI-H0731 + SOC NrtI for at least 52 weeks, after which time their viral response will be evaluated. 1. Subjects who meet the virologic response criteria at Week 52 will continue to receive ABI-H0731 + SOC NrtI for an additional 96 weeks, after which time their viral response will be evaluated at Week 148. Subjects who meet the virologic response criteria at Week 148 will discontinue both ABI-H0731 and SOC NrtI and enter long-term off-treatment follow-up for up to 3 years. Subjects with insufficient virologic response at Week 148, will discontinue ABI-H0731 only and continue on SOC NrtI alone for up to 12 weeks. 2. Subjects with insufficient virologic response at Week 52 will discontinue from ABI-H0731only and continue on SOC NrtI alone and enter follow-up for up to 12 weeks.
Receives: Drug: standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Sustained Viral Response (SVR) at 24 Weeks Off Treatment

    To evaluate the potential for combination therapy with ABI-H0731+ NrtI to increase SVR rates in subjects who have chronic hepatitis B (CHB). To evaluate the proportion of subjects who meet the definition of SVR at 24 weeks off treatment, the SVR rate and corresponding 95% confidence interval will be presented for the overall population while on combination therapy.

    SVR is defined as sustained viral response with HBV DNA , LOQ (20 IU/mL) through off-treatment Week 24.

    Measured: Completing from week 52 until week 76

Secondary outcomes (4)
  1. Number of Subjects With Adverse Events

    Incidence of treatment emergent adverse events (AEs)

    Measured: Up to Week 148

  2. Number of Subjects With Abnormal Alanine Aminotransferase (ALT) at Baseline Who Have Normal ALT at End of Treatment (EOT) and End of Study (EOS)

    To measure the number and proportion of subjects with abnormal ALT at baseline who have normal ALT at end of treatment (EOT) and end of study (EOS)

    To measure the number and proportion of subjects regardless of levels of ALT at baseline at EOT and EOS

    Measured: EOT: up to Week 52 or 148; EOS: up to 3 years off treatment

  3. Number of Subjects With Suppression/Loss of Viral HBeAg Antigen/DNA on Combination Treatment Whose Viral Antigens Rebound Off Therapy

    Incidence of subjects with suppression/loss of viral Hepatitis B "e" antigen (HBeAg) antigen/DNA on combination treatment whose viral antigens rebound off therapy

    Measured: upto Week 148

  4. Number of Subjects With Suppression/Loss of Viral Core-related Antigen/DNA on Combination Treatment Whose Viral Antigens Rebound Off Therapy

    Incidence of subjects with suppression/loss of viral core-related antigen (HBcrAg) or DNA on combination treatment whose viral antigens rebound off treatment

    Measured: Up to Week 148

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted19 Dec 2018
  2. Study start20 Dec 2018
  3. Primary completion26 Apr 2021
  4. Study completion26 Apr 2021

Why it stopped: Sponsor decision

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
92 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03780543
Sponsor's protocol ID
ABI-H0731-211
Other IDs
NCT03780543
Status last verified
Feb 2023
First submitted
15 Dec 2018
Last updated
19 Apr 2023
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Yuen MF, Fung S, Ma X, Nguyen TT, Hassanein T, Hann HW, Elkhashab M, Nahass RG, Park JS, Jacobson IM, Ayoub WS, Han SH, Gane EJ, Zomorodi K, Yan R, Ma J, Knox SJ, Stamm LM, Bonacini M, Weilert F, Ramji A, Bennett M, Ravendhran N, Chan S, Dieterich DT, Kwo PY, Schiff ER, Bae HS, Lalezari J, Agarwal K, Sulkowski MS. Long-term open-label vebicorvir for chronic HBV infection: Safety and off-treatment responses. JHEP Rep. 2024 Jan 18;6(4):100999. doi: 10.1016/j.jhepr.2023.100999. eCollection 2024 Apr.

    PubMed 38510983

Questions about this trial

What is this clinical trial studying?

A Phase 2 study of Chronic Hepatitis B, run by Assembly Biosciences at 24 sites in 5 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 19 Apr 2023. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 24 sites in United States, Canada, New Zealand, Hong Kong, United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 17 Feb 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Sustained Viral Response (SVR) at 24 Weeks Off Treatment (time frame: Completing from week 52 until week 76). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03780543, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Apr 2023.

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