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Clinical trial of nasal HB vaccine for liver transplanted patients

Phase 2a clinical trial of HBsAg/HBcAg containing intranasal vaccine for liver transplanted patients

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs061250043
Enrollment
5
Registered
2025-08-05
Start date
2026-05-28
Completion date
Unknown
Last updated
2026-06-29

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

Conditions

Liver transplantation due to HBV infection

Interventions

CVP-NASVAC is administrated via nose total 3 times in every 2 weeks. Additional dose of CVP-NASVAC is administrated in regular medical visits. HBIG injection will be skipped, if anti-HBs titer is lowe

Sponsors

Hiasa Yoichi
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Liver transplanted patients who fulfill the inclusion criteria below (1) 20-85 years old (2) Liver transplantation was conducted previously (3) HBIG was regulary administrated for mainitaining serum anit-HBs level (4) Eastern Cooperative Oncology Group (ECOG) Performance Status (PS: 0-2) (5) No evidence of organ dysfunction Liver: Child-Pugh Score less than 9 Kidney: eGFR more than 30 Heart: No abnormality in ECG Lung: SpO2 above 90% in room air

Exclusion criteria

Exclusion criteria: (1) Allergic history of past vaccination (2) Pregnant, unwilling to practice contraception during the study or lactating female (3) Severe complication (malignant hypertension, severe congestive heart failure, severe liver failure, poorly controlled diabetes mellitus, severe pulmonary fibrosis, active interstitial pneumonia) (4) Bearing malignant carcinoma including HCC (5) Severe mental disability (6) if participation in the study is not in the best interest of the research subject (e.g., may compromise the subject's well-being), or if it is determined that participation would interfere with, restrict, or confound the specific assessments outlined in the clinical research protocol (7) Individuals who, under the direction of the principal investigator or the study site, are directly involved in this study or other clinical studies, including employees of the principal investigator or the study site, as well as family members of such employees or of the principal investigator

Design outcomes

Primary

MeasureTime frame
(1) anti-HBs induction and maintainace (2) total administrated dose of HBIG

Secondary

MeasureTime frame
1) number of AEs, frequency of AE more than grade 3 2) induction of IgA type HBs 3) induction of anti-HBc (IgG and IgA) 4) induction of HBV specific CTL 5) HBV neutralizing capacity 6) frequency of HBV reactivation

Contacts

Public ContactOsamu Yoshida

Ehime University

yoshidao@m.ehime-u.ac.jp+81-89-960-5308

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026