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Hepatitis B, ChronicPhase 1EXTEND-101NCT07617194

Study of AHB-171 in Chronic Hepatitis B Participants

A Phase 1 study testing AHB-171 and Nucleos(t)ide Analogue (NA) in people with Hepatitis B, Chronic, run by AusperBio Therapeutics Inc. at 2 sites in 2 countries.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

The goal of this clinical trial is to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics of AHB-171 in participants with chronic hepatitis B (CHB). Study advancement to subsequent parts/cohorts will require satisfactory interim reviews of available cumulative safety data by the Safety… Read more about this study

Who is it for?
Ages 18 to 65 years
Conditions the study is for
Hepatitis B, Chronic
What is being tested?
AHB-171 and Nucleos(t)ide Analogue (NA)
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
144 participants
Where
2 sitesin 2 countries
Study dates
6 Jul 2026to 14 Aug 2028
Phase
Phase 1
Are there results?
Not yet: the study is under way

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 65 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male or female participants, aged 18-65 years old (inclusive)
  • Body Mass Index between 19 to 35 kg/m2 (inclusive)
  • Body weight > or = 45 kg.
  • Documented HBV infection for ≥6 months prior to randomization.
  • For Parts A and B, on stable approved NA monotherapy for at least 6 months prior to randomization.
  • For Part C and D only, not on any NA monotherapy for at least 6 months prior to randomization.
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  • Screening electrocardiogram (ECG) without clinically significant abnormalities
  • Females of childbearing potential must not be breastfeeding, must have a negative serum pregnancy test at Screening, and a negative urine/serum pregnancy test before dosing (unless permanently sterile or >2 years postmenopausal).
  • Males and females of childbearing potential must agree to use protocol specified reliable contraception throughout the study.
  • Screening HBV DNA, HBsAg and ALT must meet prespecified requirements.

Who cannot join

  • Significant medical conditions other than chronic HBV (e.g. recent heart issues, unstable cardiac disease, uncontrolled diabetes, bleeding disorders, prior organ transplant).
  • Other clinically significant liver diseases (e.g. hepatitis from other causes, autoimmune or alcoholic liver disease, prior liver failure).
  • History of suspected or confirmed cirrhosis (based on FibroScan® or biopsy).
  • Current, past, or suspected liver cancer, or elevated alpha-fetoprotein (AFP) ≥ 20 ng/mL.
  • HBV-related extrahepatic diseases (e.g. kidney or vascular conditions).
  • Severe infection (other than chronic HBV infection) within 1 month before randomization requiring intravenous treatment.
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  • Active infections: human immunodeficiency virus (HIV), hepatitis C virus (HCV), hepatitis D virus (HDV) or syphilis (exceptions if RNA negative).
  • Abnormal lab results (e.g. low albumin, reduced kidney function, abnormal INR, low platelets, high bilirubin, abnormal blood counts, significant proteinuria).
  • History or signs of vasculitis or related autoimmune diseases.
  • Malignancy within 5 years (except non-melanoma skin cancer).
  • Allergy to study drug components.
  • Recent major surgery/trauma (within 3 months) or planned surgery during study.
  • Alcohol or substance abuse affecting compliance.
  • Pregnancy, breastfeeding, or unwillingness to follow reproductive restrictions.
  • Participation in another clinical trial or recent investigational product use.
  • Prior treatment with any antisense oligonucleotide or small interfering RNA therapies.
  • Recent or ongoing use of immunosuppressive/biologic therapies, certain vaccines, bulevirtide, or unapproved herbal remedies.
  • Need for long-term anticoagulants/antiplatelet drugs (unless safely stopped).
  • Any other condition making the participant unsuitable (per investigator).

Trial locations and contacts

2 sites in 2 countries. Contact the study team or a site near you to ask about taking part.

2 sites in 2 countries

Hong Kong1 site
  • Queen Mary Hospital

    Hong Kong

Other trials in Hong Kong

New Zealand1 site
  • New Zealand Clinical Research

    Grafton, Auckland, 1010

Other trials in New Zealand

About this study

Official title: A Phase 1 Study in Chronic Hepatitis B Participants to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of AHB-171

The goal of this clinical trial is to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics of AHB-171 in participants with chronic hepatitis B (CHB). Study advancement to subsequent parts/cohorts will require satisfactory interim reviews of available cumulative safety data by the Safety Review Committees (SRC), using the safety criteria and review procedures described in the protocol.

Being tested
AHB-171, Placebo matching [Investigational Product], Nucleos(t)ide Analogue (NA)
Medical subject headings
Hepatitis B, Chronic

What participants receive

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

  • AHB-171Drug

    Injection

  • Placebo matching [Investigational Product]Drug

    Injection

  • Nucleos(t)ide Analogue (NA)Drug

    Oral administration

Study groups in NCT07617194
Study groupRoleWhat they receive
AHB-171 or Placebo in CHB (Part A: Single Ascending Dose [SAD])ExperimentalNot described
Receives: Drug: AHB-171; Drug: Placebo matching [Investigational Product]; Drug: Nucleos(t)ide Analogue (NA)
AHB-171 or Placebo in CHB (Part B: finite Multiple Dose [MD])ExperimentalNot described
Receives: Drug: AHB-171; Drug: Placebo matching [Investigational Product]; Drug: Nucleos(t)ide Analogue (NA)
AHB-171 and placebo in CHB (Part C: finite MD)ExperimentalNot described
Receives: Drug: AHB-171; Drug: Placebo matching [Investigational Product]
AHB-171 and placebo in CHB (Part D: finite MD)ExperimentalNot described
Receives: Drug: AHB-171; Drug: Placebo matching [Investigational Product]

What is being measured

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

  1. Incidence of Adverse Events (AEs) [Safety and Tolerability]

    Measured: Up to 72 weeks

  2. The plasma pharmacokinetic (PK) profile of AHB-171 and metabolites: the maximum observed plasma concentration (Cmax) of AHB-171.

    Measured: Up to 72 weeks

  3. The plasma pharmacokinetic (PK) profile of AHB-171 and metabolites: the area under the concentration-time curve extrapolated to infinity (AUCinf ) of AHB-171

    Measured: Up to 72 weeks

  4. Incidence of clinically significant changes in Vital Signs [Safety and Tolerability]

    Vital signs include body temperature, pulse rate, respiratory rate, and blood pressure

    Measured: Up to 72 weeks

  5. Incidence of clinically significant changes in cardiac parameters [Safety and Tolerability]

    12-lead electrocardiogram (ECG) abnormalities will be reported, with parameters evaluated including PR interval, QRS duration, QT/QTc interval.

    Measured: Up to 72 weeks

  6. Incidence of laboratory abnormalities [Safety and Tolerability]

    Measured: Up to 72 weeks

  7. The plasma pharmacokinetic (PK) profile of AHB-171 and metabolites: area under the curve from the time of dosing to the last measurable concentration (AUClast) of AHB-171

    Measured: Up to 72 weeks

Secondary outcomes (27)
  1. Absolute serum HBsAg (Hepatitis B surface antigen) and change from baseline across all evaluated timepoints in the study

    Measured: Up to 72 weeks

  2. Absolute serum HBV (Hepatitis B virus) DNA and change from baseline across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  3. Absolute serum HBeAb (Hepatitis B e Antibody) and change from baseline across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  4. Proportion of participants achieving pre-specified HBsAg reduction levels or absolute thresholds across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  5. Proportion of participants achieving HBsAg < or ≥ LOD (limit of detection) and/or HBV DNA < or ≥ LLOQ (lower limit of quantitation) across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  6. Proportion of participants achieving pre-specified HBV DNA levels or absolute thresholds across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  7. Time to achieving pre-specified HBsAg levels or absolute thresholds across all evaluated timepoints in the study

    Measured: Up to 72 weeks

  8. Change from baseline in alanine aminotransferase (ALT) levels

    Measured: Up to 72 weeks

  9. Proportion of participants with ALT normalization among those with elevated ALT at baseline across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  10. Proportion of participants achieving anti-HBs seroconversion across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  11. Proportion of participants experiencing virologic relapse.

    Virologic relapse is defined as HBV DNA meeting a protocol-specified threshold value at 2 consecutive visits

    Measured: Up to 72 weeks

  12. Time to participants experiencing virologic relapse.

    Virologic relapse is defined as HBV DNA meeting a protocol-specified threshold value at 2 consecutive visits

    Measured: Up to 72 weeks

  13. Proportion of participants with treatment emergent AEs (TEAEs), serious AEs (SAEs), or discontinuation due to AEs.

    Measured: Up to 72 weeks

  14. Proportion of participants with anti-drug antibodies (ADA) to AHB-171.

    Measured: Up to 72 weeks

  15. ADA titers in participants with ADA to AHB-171 across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  16. Plasma PK parameters AUC of AHB-171 and metabolites.

    Measured: Up to 72 weeks

  17. Plasma PK parameter Cmax of AHB-171 and metabolites.

    Measured: Up to 72 weeks

  18. Plasma PK parameter Time to Peak Concentration (tmax) of AHB-171 and metabolites.

    Measured: Up to 72 weeks

  19. Plasma PK parameter apparent clearance (CL [clearance]/F [Bioavailability]) of AHB-171 and metabolites.

    Measured: Up to 72 weeks

  20. Urine PK parameter cumulative amount excreted (Ae) of AHB-171 and metabolites.

    Measured: Up to 72 weeks

  21. Urine PK parameter renal clearance (CLr) of AHB-171 and metabolites.

    Measured: Up to 72 weeks

  22. Absolute serum HBV ribonucleic acid (RNA) and change from baseline across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  23. Absolute serum HBcrAg (Hepatitis B core-related antigen) and change from baseline across all evaluated timepoints in the study

    Measured: Up to 72 weeks

  24. Absolute serum HBeAg (Hepatitis B e antigen) and change from baseline across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  25. Proportion of participants with hs-HBsAg (high-sensitivity HBsAg) <LLOQ across all evaluated timepoints in the study.

    Measured: Up to 72 weeks

  26. Absolute serum HBsAb (Hepatitis B surface Antibody) and change from baseline across all evaluated timepoints in the study.

    Measured: Time Frame: Up to 72 weeks

  27. Time to first hs-HBsAg <LLOQ, assessed at scheduled visits

    Measured: Up to 72 weeks

Timeline

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

  1. First posted1 Jun 2026
  2. Study start6 Jul 2026 (estimated)
  3. Primary completion8 Oct 2027 (estimated)
  4. Study completion14 Aug 2028 (estimated)

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 1
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Participant
Enrolment
144 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07617194
Sponsor's protocol ID
AB-17-8001
Acronym
EXTEND-101
Status last verified
May 2026
First submitted
7 May 2026
Last updated
1 Jun 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing AHB-171 and Nucleos(t)ide Analogue (NA) in people with Hepatitis B, Chronic, run by AusperBio Therapeutics Inc. at 2 sites in 2 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 10 inclusion and 19 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: opening soon, as of the sponsor's last update on 1 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in Hong Kong, New Zealand. 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 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

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

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

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

Contact Debbie Liao ((650) 650-2877, ausperbioclinicaltrials@ausperbio.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of Adverse Events (AEs) [Safety and Tolerability] (time frame: Up to 72 weeks). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 1 Jun 2026.

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