Testing a new vaccine for chronic hepatitis B

Phase I/II Study to Determine the Safety, Immunogenicity and Efficacy of the Therapeutic Hepatitis B Virus Synthetic Long Peptide Vaccination ISA104

PHASE1; PHASE2 · Erasmus Medical Center · NCT05841095

This study is testing a new vaccine for chronic hepatitis B to see if it can help boost the immune response in patients already receiving antiviral treatment.

Quick facts

PhasePHASE1; PHASE2
Study typeInterventional
Enrollment24 (estimated)
Ages18 Years to 55 Years
SexAll
SponsorErasmus Medical Center (other)
Locations1 site (Rotterdam)
Trial IDNCT05841095 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the safety and immune response of a novel synthetic long peptide vaccine, ISA104, in patients with chronic hepatitis B. Participants receiving antiviral treatment will be administered different doses of ISA104, while a control group will receive a placebo. The study aims to determine how well ISA104 induces immunity against the hepatitis B virus and its overall safety profile.

Who should consider this trial

Good fit: Ideal candidates for this study are patients with chronic hepatitis B who are currently undergoing antiviral treatment.

Not a fit: Patients who are immunocompromised or have evidence of liver cirrhosis may not benefit from this study.

Why it matters

Potential benefit: If successful, this vaccine could provide a new therapeutic option for patients with chronic hepatitis B, potentially leading to improved immune responses and better management of the disease.

How similar studies have performed: Other studies have explored therapeutic vaccines for hepatitis B, showing promise, but this specific approach with ISA104 is novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* cHBV
* Active treatment with NUCs and HBV DNA \< limit of quantification

Exclusion Criteria:

* Immune-compromised
* Evidence of liver cirrhosis

Where this trial is running

Rotterdam

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Chronic Hepatitis b, Immunotherapy, Therapeutic Vaccination, Hepatitis B cure

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.