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A Phase IIB-III study to assess the efficacy of ABX203 to maintain control of Hepatitis B disease after cessation of treatment with nucleos(t)ide analogs in adult HBeAg negative patients with chronic Hepatitis B in the Asia Pacific region

A Phase IIB-III, open-label, randomized, comparative study to assess the efficacy of ABX203 to maintain control of Hepatitis B disease after cessation of treatment with nucleos(t)ide analogs in adult HBeAg negative patients with chronic Hepatitis B in the Asia Pacific region

Status
Active, not recruiting
Phases
Phase 2Phase 3
Study type
Interventional
Source
CRIS
Registry ID
KCT0001706
Enrollment
234
Registered
2015-11-25
Start date
2015-08-11
Completion date
Unknown
Last updated
2019-03-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Biological/Vaccine, Non-Stem Cell : Open-label, randomized, comparative, multicenter clinical trial. After screening, subjects will be randomized (2:1) to one of two groups: • Group 1 will receive

Sponsors

Novotech Asia Korea
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Male or female subject between 18 and 65 years of age at the time of randomization. 2. Must be HBeAg negative and anti-HBe Abs positive for at least 1 year prior to screening and at screening (patients with missing documentation on anti-HBe Abs one year prior to screening could be included if they are anti-HBe Abs positive at screening). 3. Has HBV DNA < 40 IU/mL for at least 1 year prior to screening and at screening. 4. Has both ALT and AST levels = ULN for at least 1 year prior to screening and at screening (For AST only, patients with missing documentation one year prior to screening could be included if their AST levels = ULN at screening). 5. Must be HBsAg positive at screening. 6. as been treated with NUCs for at least 2 years prior to screening. 7. as not been treated with pegylated interferon(PEG-IFN) or interferon(IFN) for at least 1 year prior to screening. 8. the subject is female, she must be of non-childbearing potential (i.e., either surgically sterilized or 1 year post-menopausal); or, if of childbearing potential, she has been using adequate contraception (e.g., intra-uterine contraceptive device; oral contraceptives; diaphragm or condom in combination with contraceptive jelly, cream or foam) for 30 days prior to administration of study product. The subject must also have a negative serum pregnancy test at screening and must agree to continue to use adequate contraception during her participation in the study and for 6 months after completion of the study product administration. 9. an and will comply with the requirements of the protocol (e.g., return for follow-up visits), in the opinion of the Investigator. 10. as provided written informed consent.

Exclusion criteria

Exclusion criteria: 1.Has elevated blood levels of alpha-fetoprotein (AFP) (> 120 ng/mL) AND/OR evidence of increasing values after 3 consecutive testing in the past 2.Has cirrhosis, defined as - platelet count < 100,000/mm3 or -platelet count < 150,000/mm3, with esophageal varices on imaging and spleen size > 12 cm, or -liver stiffness of 11 kilopascal [kPa] as measured by elastography using FibroScan® or -an AST to Platelet Ratio Index (APRI) > 2). 3.Has hepatocellular carcinoma (HCC) (diagnosed by ultrasonography). 4.Has liver decompensation (albumin < 3.0 g/dL and bilirubin =1.3 mg/dL). 5.Is Hepatitis C virus (HCV) Ab positive at screening. 6.Is Hepatitis delta virus (HDV) Ab positive at screening. 7.Is Human Immunodeficiency Virus (HIV) Ab positive at screening. 8.Has an immune suppressive disorder or treatment with immunosuppressive drugs. 9.Has been treated with corticosteroids within 12 weeks prior to the first administration of study product, with the exception of topical or inhaled corticosteroids. 10.Has been treated with rituximab. 11.Has other hepatic diseases of different etiology (such as auto-immune hepatitis, toxic hepatitis, Wilson disease, alcoholic or hemochromatosis). 12.Has a history of allergic disease or reactions likely to be exacerbated by any component of the study products. 13.Has a history of a substance abuse (drug or alcohol) problem within the previous 3 years.

Design outcomes

Primary

MeasureTime frame
Percentage of subjects with viral load < 40 IU/mL, normal ALT and normal AST at all visits between Week 24 and Week 48.

Secondary

MeasureTime frame
Clinical response defined as changes in viral load, liver function, time to relapse ;Immune response defined as T-cell response by intracellular cytokine staining(ICS) (CD4 and CD8 to HBcAg and HBsAg);Safety assessment will be conducted throughout the study and will include physical examinations, vital signs, clinical laboratory évaluations, and the recording of AEs

Countries

Korea, Republic of

Contacts

Public ContactSunJin Chung

Yonsei University Health System, Severance Hospital

Outcome results

None listed

Source: CRIS (via WHO ICTRP) · Data processed: Feb 4, 2026