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Trial details imported from ClinicalTrials.gov

For full trial details, please see the original record at https://clinicaltrials.gov/ct2/show/NCT03780543




Registration number
NCT03780543
Ethics application status
Date submitted
15/12/2018
Date registered
19/12/2018
Date last updated
19/04/2023

Titles & IDs
Public title
A Study of ABI-H0731 + Nucleos(t)Ide as Finite Treatment for Chronic Hepatitis B Patients
Scientific title
A Multi-center, Open-label, Long-term Extension Study of ABI-H0731 + Nucleos(t)Ide as Finite Treatment for Chronic Hepatitis B Patients
Secondary ID [1] 0 0
ABI-H0731-211
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Chronic Hepatitis B 0 0
Condition category
Condition code
Infection 0 0 0 0
Other infectious diseases
Oral and Gastrointestinal 0 0 0 0
Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
Treatment: Drugs - standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)

Active Comparator: HBeAg-negative Subjects from Parent Study ABI-H0731-201 - Subjects 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.

Active Comparator: HBeAg-positive Subjects from Parent Study ABI-H0731-201 - Subjects 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.
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.
Subjects with insufficient virologic response will discontinue ABI-H0731 only and continue on SOC NrtI alone and followed-up for 12 weeks.

Active Comparator: Subjects from Parent Study ABI-H0731-202 - Subjects 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.
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.
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.


Treatment: Drugs: standard of care (SOC) Nucleoside reverse transcriptase inhibitor (NrtI)
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.
Intervention code [1] 0 0
Treatment: Drugs
Comparator / control treatment
Control group

Outcomes
Primary outcome [1] 0 0
Sustained Viral Response (SVR) at 24 Weeks Off Treatment
Timepoint [1] 0 0
Completing from week 52 until week 76
Secondary outcome [1] 0 0
Number of Subjects With Adverse Events
Timepoint [1] 0 0
Up to Week 148
Secondary outcome [2] 0 0
Number of Subjects With Abnormal Alanine Aminotransferase (ALT) at Baseline Who Have Normal ALT at End of Treatment (EOT) and End of Study (EOS)
Timepoint [2] 0 0
EOT: up to Week 52 or 148; EOS: up to 3 years off treatment
Secondary outcome [3] 0 0
Number of Subjects With Suppression/Loss of Viral HBeAg Antigen/DNA on Combination Treatment Whose Viral Antigens Rebound Off Therapy
Timepoint [3] 0 0
upto Week 148
Secondary outcome [4] 0 0
Number of Subjects With Suppression/Loss of Viral Core-related Antigen/DNA on Combination Treatment Whose Viral Antigens Rebound Off Therapy
Timepoint [4] 0 0
Up to Week 148

Eligibility
Key inclusion criteria
1. Willing and able to provide informed consent.

2. 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.

3. 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.

4. 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.

5. 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.

6. In good general health except for chronic HBV infection.

7. Have the ability to take oral medication and be willing to adhere to the ABI-H0731-211
regimen in the opinion of the Investigator.
Minimum age
18 Years
Maximum age
71 Years
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
1. Must not have had evidence of HBV resistance-associated variants (RAVs) or lack of
compliance on a previous study of ABI H0731.

2. 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.

3. 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.

4. Females who are lactating or pregnant or wish to become pregnant within the duration
of the ABI-H0731-211 study.

Study design
Purpose of the study
Treatment
Allocation to intervention
Non-randomised trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?



Intervention assignment
Parallel
Other design features
Phase
Phase 2
Type of endpoint/s
Statistical methods / analysis

Recruitment
Recruitment status
Terminated
Data analysis
Reason for early stopping/withdrawal
Other reasons
Date of first participant enrolment
Anticipated
Actual
20/12/2018
Date of last participant enrolment
Anticipated
Actual
Date of last data collection
Anticipated
Actual
26/04/2021
Sample size
Target
Accrual to date
Final
92
Recruitment in Australia
Recruitment state(s)
Recruitment outside Australia
Country [1] 0 0
United States of America
State/province [1] 0 0
California
Country [2] 0 0
United States of America
State/province [2] 0 0
Florida
Country [3] 0 0
United States of America
State/province [3] 0 0
Maryland
Country [4] 0 0
United States of America
State/province [4] 0 0
New Jersey
Country [5] 0 0
United States of America
State/province [5] 0 0
New York
Country [6] 0 0
United States of America
State/province [6] 0 0
Pennsylvania
Country [7] 0 0
Canada
State/province [7] 0 0
British Columbia
Country [8] 0 0
Canada
State/province [8] 0 0
Ontario
Country [9] 0 0
Hong Kong
State/province [9] 0 0
Hong Kong
Country [10] 0 0
New Zealand
State/province [10] 0 0
Auckland
Country [11] 0 0
New Zealand
State/province [11] 0 0
Hamilton
Country [12] 0 0
United Kingdom
State/province [12] 0 0
London

Funding & Sponsors
Primary sponsor type
Commercial sector/Industry
Name
Assembly Biosciences
Address
Country

Ethics approval
Ethics application status

Summary
Brief summary
Open-label, extension study to evaluate the safety and efficacy of combination therapy and
its effect on sustained viral response biomarkers.
Trial website
https://clinicaltrials.gov/ct2/show/NCT03780543
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 0 0
Michele Anderson
Address 0 0
Assembly Biosciences Inc.
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries



Summary Results

For IPD and results data, please see https://clinicaltrials.gov/ct2/show/NCT03780543