A Study to Evaluate AHB-137 Injection in Treatment-naïve Participants With Chronic Hepatitis B

A Randomized, Double-blind, Placebo-controlled, Multicenter Phase 2 Clinical Study to Evaluate the Efficacy and Safety of AHB-137 Injection in Treatment-naïve Participants With Chronic Hepatitis B.

This study is a randomized, double-blind, placebo-controlled, multicenter phase 2 study to assess the efficacy and safety of AHB-137 injection in treatment-naïve participants with chronic hepatitis B.

Study Overview

• Status: Not yet recruiting
• Conditions: Chronic Hepatitis B
• Intervention / Treatment: Drug: Placebo; Drug: AHB-137

• Study Type: Interventional
• Enrollment (Estimated): 320
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Lu; Phone Number: 0571-86959519; Email: clinicaltrial@ausperbio.com

Study Locations

• China
  • Chongqing Municipality
    • Chongqing, Chongqing Municipality, China
      • The Second Affiliated Hospital of Chongqing Medical University
  • Zhejiang
    • Hangzhou, Zhejiang, China
      • The First Affiliated Hospital of Zhejiang University School of Medicine

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Volunteer to participate and sign the informed consent form, and are willing to complete the study in accordance with the requirements of the protocol.
• Aged 18-65 years (including boundary values).
• Body mass index between the range of 18-32 kg/m2 (inclusive boundary values).
• HBsAg or HBV DNA positive for ≥ 6 months at screening and no antiviral treatment with interferon or nucleoside analogue.
• HBsAg and HBV DNA values met protocol requirements at screening.
• ALT < 3xULN at screening.
• Use highly effective contraception as required.

Exclusion Criteria:

• Uncontrolled and stable clinically significant abnormalities other than a history of chronic HBV infection.
• Participants with other clinically significant liver diseases, previous/current manifestations of hepatic decompensation, and a history of extrahepatic diseases that may be related to HBV immune status.
• Any serious infection other than chronic hepatitis B infection requiring intravenous anti-infective therapy within 1 month prior to randomization.
• Hepatitis C virus (HCV) infection or < 12 months from cure at screening (HCV RNA positive within 12 months), human immunodeficiency virus (HIV) positive at screening, and syphilis positive (treponema pallidum antibody positive).
• Significant fibrosis or cirrhosis, or liver stiffness value (LSM) > 9.0 kPa at screening.
• Participants with confirmed or suspected liver cancer who have a history of malignancy within the past 5 years or are undergoing assessment for a possible malignancy.
• Laboratory test results do not meet the criteria.
• Prior/current autoimmune disease, history of vasculitis, or presence of signs, symptoms, or laboratory tests of underlying vasculitis.
• Fridericia ' s formula corrected QT interval (QTcF) ≥ 450 msec for male participants and ≥ 470 msec for female participants at screening.
• Allergic to AHB-137 ingredients, or history of drug allergy or other allergies.
• Major trauma or major surgery within 3 months prior to screening, or planned surgery during the trial.
• Participants are participating in another clinical trial or failing to wash out as required.
• Current use or use of any immunosuppressive medication (e.g. prednisone) within 3 months prior to screening, except for short courses (≤ 2 weeks) or use of topical/inhaled steroids;Those who have used immunomodulators within 3 months prior to screening;Those who have used cytotoxic drugs within 6 months prior to screening;History of vaccination within 1 month prior to screening or a live vaccination plan during the trial.
• Participants that require regular long-term anticoagulants.
• Abnormal thyroid function.
• Participants that have received any antisense oligonucleic acid, siRNA, capsid assembly modulator (CAM) antiviral drug used to treat chronic hepatitis B.
• Any other circumstances or conditions in which, in the opinion of the investigator, the participant is inappropriate for participation in this trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: AHB-137; AHB-137 will be administered subcutaneously.	Drug: AHB-137; AHB-137 will be administered subcutaneously.
Placebo Comparator: Placebo; Placebo will be administered subcutaneously.	Drug: Placebo; Placebo will be administered subcutaneously.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
HBV DNA < lower limit of quantitation (LLOQ), 10 IU/mL, HBsAg < limit of detection (LOD), 0.05 IU/mL with or without hepatitis B virus surface antibody (HBsAb) 24 weeks after discontinuation of all chronic hepatitis B treatment.	Up to 48 weeks.
Highly sensitive HBsAg < 0.005 IU/mL and HBV DNA < LLOQ (10 IU/mL) at the end of treatment.	Up to 48 weeks.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
HBV DNA < LLOQ, 10 IU/mL, and HBsAg < 10 IU/mL 24 weeks after discontinuation of all chronic hepatitis B treatment.		Up to 48 weeks.
HBV DNA < LLOQ 24 weeks after discontinuation of all chronic hepatitis B treatment.		Up to 48 weeks.
HBV DNA < LLOQ and HBsAg < 100 IU/mL 24 weeks after discontinuation of all chronic hepatitis B treatment.		Up to 48 weeks.
HBsAg seroconversion rate 24 weeks after discontinuation of all chronic hepatitis B treatment.	HBsAg seroconversion : serum HBsAg<LOD, and at the same time or subsequently, HBsAb>10 IU/L.	Up to 48 weeks.
HBeAg seroconversion rate 24 weeks after discontinuation of all chronic hepatitis B treatment.	HBeAg seroconversion:HBeAg negative, with simultaneous or subsequent positivity for HBeAb.	Up to 48 weeks.
Proportion of participants who discontinued all chronic hepatitis B treatment at the end of treatment.		Up to 48 weeks.
HBV DNA < LLOQ and HBsAg < LOD rate and HBV DNA < LLOQ and HBsAg < 10 IU/mL rate by visit.		Up to 48 weeks.
HBsAg, HBeAg seroconversion rates by visit.	HBsAg seroconversion: serum HBsAg<LOD, and at the same time or subsequently, HBsAb>10 IU/L. HBeAg seroconversion: HBeAg negative, with simultaneous or subsequent positivity for HBeAb.	Up to 48 weeks.
Test Values of Virological Parameters.	HBsAb, HBsAg, HBV DNA values and changes from baseline at each visit.	Up to 48 weeks.
Time to first achievement of HBsAg and first HBeAg seroconversion.	HBsAg seroconversion: serum HBsAg<LOD, and at the same time or subsequently, HBsAb>10 IU/L. HBeAg seroconversion: HBeAg negative, with simultaneous or subsequent positivity for HBeAb.	Up to 48 weeks.
Changes of the hepatitis B quality of life (HBQOL) instrument in participants compared with baseline.	Response options range from 1 to 5 with higher scores indicating more severe impact .	Up to 48 weeks.
Changes of the score of EuroQol Five-Dimension Five-Level Scale (EQ-5D-5L) in participants compared with baseline.	The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The patient is asked to indicate his/her health state by ticking the box next to the most appropriate statement in each of the five dimensions. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the participant's health state.	Up to 48 weeks.
Proportion of participants with protocol-defined virologic response for HBsAg and HBV DNA.		Up to 48 weeks.
Change from baseline in alanine aminotransferase (ALT) and noninvasive assessment of liver fibrosis at each visit.		Up to 48 weeks.
Time to normalization of ALT without rescue therapy (for participants with abnormal baseline ALT).		Up to 48 weeks.
AHB-137 resistance analysis.	Method: Sequencing of HBV DNA/RNA.	Up to 48 weeks.
Proportion of participants who are HBeAb positive and HBeAg negative, and the test values of HBsAb, HBsAg and HBV DNA meet certain conditions.		Up to 48 weeks.
Safety: number of participants with treatment-emergent adverse events (TEAEs), serious adverse events (SAE) and clinically significant examination results.	Examination including laboratory examination, electrocardiogram (ECG) examination.	Up to 48 weeks.
Proportion of participants with positive anti-drug antibody (ADA) and ADA level at each visit.		Up to 48 weeks.
Plasma drug concentration of AHB-137.		Up to 48 weeks.

Collaborators and Investigators

• Sponsor: Ausper Biopharma Co., Ltd.
• Investigators: Principal Investigator: Peng Hu, The Second Affiliated Hospital of Chongqing Medical University; Principal Investigator: Yunqing Qiu, Zhejiang University

Study record dates

Study Major Dates

• Study Start (Estimated): June 20, 2026
• Primary Completion (Estimated): June 20, 2027
• Study Completion (Estimated): June 20, 2028

Study Registration Dates

• First Submitted: May 28, 2026
• First Submitted That Met QC Criteria: June 3, 2026
• First Posted (Actual): June 9, 2026

Study Record Updates

• Last Update Posted (Actual): June 9, 2026
• Last Update Submitted That Met QC Criteria: June 3, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Keywords: Chronic Hepatitis B
• Additional Relevant MeSH Terms: Blood-Borne Infections; Pathologic Processes; Chronic Disease; Disease Attributes; Infections; Virus Diseases; Digestive System Diseases; Liver Diseases; Hepatitis, Viral, Human; Communicable Diseases; DNA Virus Infections; Hepadnaviridae Infections; Hepatitis, Chronic; Hepatitis; Pathological Conditions, Signs and Symptoms; Hepatitis B; Hepatitis B, Chronic
• Other Study ID Numbers: AB-10-8016

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