EBV mRNA Vaccine for the Prevention of EBV-Related Diseases After Allo-HSCT
An Exploratory Study of EBV mRNA Vaccine for the Prevention of EBV-Related Diseases After Allogeneic Hematopoietic Stem Cell Transplantation
The purpose of this clinical trial is to investigate the efficacy of the EBV mRNA vaccine (WGc-0401 injection) in preventing EBV-related diseases after allogeneic hematopoietic stem cell transplantation (allo-HSCT), and to evaluate the safety and efficacy of this vaccine in patients following allo-HSCT.
The main study questions are:
- The incidence of grade III-IV acute graft-versus-host disease (aGVHD) within 100 days, and the occurrence of ≥ grade 3 adverse events (AEs) that are possibly or definitely related to the vaccine, in patients receiving EBV mRNA vaccination after allo-HSCT.
- To determine the optimal biological dose (OBD) of the EBV mRNA vaccine in patients after allo-HSCT among the dose levels of 25μg, 50μg, 75μg, or 100μg.
- EBV-ELISpot levels, the incidence of EBV viremia (EBV DNAemia), the incidence of post-transplant lymphoproliferative disorders (PTLD), disease relapse rate during follow-up, non-relapse mortality (NRM), and immunogenicity indicators (IFN-γ+ T cells, immune cell analysis, cytokine profiles, EBV glycoprotein antigen antibodies).
Participants will:
- Receive three intramuscular injections of the EBV mRNA vaccine on days 30, 44, and 81 after allogeneic hematopoietic stem cell transplantation (d30, d44, d81).
- Be hospitalized for at least 72 hours after each vaccination for close monitoring (with a focus on CRS and aGVHD), and undergo intensive safety assessments throughout the dose-escalation period (at least 28 days).
- Return for clinical visits on days 7 (d37, d51, d88), day 14 (d58), and day 180 (d180) after vaccination for EBV-ELISpot, EBV-DNA quantification, and immunogenicity testing, with continued long-term follow-up to evaluate safety and the persistence of vaccine-induced immune responses.
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Tipo di studio
Tipo di studio
Iscrizione (Stimato)
Iscrizione
Fase
Fase
- Prima fase 1
Contatti e Sedi
Contatto studio
Contatto studio
- Nome: shan zhang
- Numero di telefono: +8618382430038
- Email: 952750480@qq.com
Backup dei contatti dello studio
- Nome: hai yi
- Numero di telefono: +8613699418229
- Email: yihaimail@163.com
Luoghi di studio
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Sichuan
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Chengdu, Sichuan, Cina
- The General Hospital of Western Theater Command
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Contatto:
- shan zhang
- Numero di telefono: +8618382430038
- Email: 952750480@qq.com
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Contatto:
- hai yi
- Numero di telefono: +8613699418229
- Email: yihaimail@163.com
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Investigatore principale:
- shan zhang
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
- Bambino
- Adulto
- Adulto più anziano
Accetta volontari sani
Descrizione
Inclusion Criteria:
- Age ≥14 years, regardless of gender;
- Patients undergoing allogeneic hematopoietic stem cell transplantation;
- Voluntary participation in the clinical study and signing of the informed consent form.
Exclusion Criteria:
- History of vaccine allergy;
- Presence of active acute graft-versus-host disease (aGVHD) at screening;
- Severe impairment of cardiac, hepatic, or renal function;
- Body temperature >38°C within 72 hours prior to enrollment;
- Inability to communicate reliably with the investigator or unlikely to comply with study requirements;
- Any other condition deemed by the investigator to make the patient unsuitable for enrollment.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Nessuno (etichetta aperta)
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
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Sperimentale: EBV mRNA Vaccine (WGc-0401)
Drug: EBV mRNA vaccine (WGc-0401 injection) Description: Intramuscular injection of EBV mRNA vaccine (WGc-0401 injection)
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Intramuscular injection of EBV mRNA vaccine (WGc-0401 injection)
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Nessun intervento: Observation Group
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Incidence of grade III-IV acute graft-versus-host disease (aGVHD)
Lasso di tempo: Up to 100 days after HSCT
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Assessed according to the modified Glucksberg criteria (or the MAGIC criteria), with clinical staging comprehensively determined by the attending physician based on the involvement of skin, upper and lower gastrointestinal tract, and liver.
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Up to 100 days after HSCT
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Incidence of grade ≥3 treatment related adverse events (TRAEs)
Lasso di tempo: Up to 180 days after HSCT
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AEs graded per CTCAE v6.0.
Grade ≥3 AEs with causality assessed as possibly, probably, or definitely related to the vaccine are captured.
Systematic AE assessment at each visit covers: local injection site reactions, systemic symptoms (fever, fatigue), laboratory abnormalities (cytopenias, transaminitis), and hypersensitivity.
Causality determined by investigator based on temporal association, biological plausibility, and exclusion of other causes.
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Up to 180 days after HSCT
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Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Incidence of EBV viremia
Lasso di tempo: From Day 30 to Day 180 post-transplant
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EBV-DNA load measured in plasma by quantitative real-time PCR (qPCR).
Abnormal viremia defined as either: (1) ≥10³ copies/mL on two consecutive measurements (with an interval of at least 1 day), or (2) a single measurement ≥10⁴ copies/mL.
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From Day 30 to Day 180 post-transplant
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EBV-specific T-cell response measured by IFN-γ ELISpot
Lasso di tempo: Post-transplant days 37, 44, 51, 58, 81, 88, and 180
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EBV-specific T-cell immune response measured by interferon-gamma (IFN-γ) enzyme-linked immunospot (ELISpot) assay using peripheral blood mononuclear cells (PBMCs) stimulated with EBV peptide pools (e.g., LMP2, EBNA1, BZLF1).
Results expressed as spot-forming cells (SFC) per 2×10⁵ PBMCs.
Positive response defined as ≥25 SFC/2×10⁵ PBMCs and at least 2-fold above negative control.
Samples collected at protocol-specified time points.
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Post-transplant days 37, 44, 51, 58, 81, 88, and 180
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Incidence of post-transplant lymphoproliferative disorders (PTLD)
Lasso di tempo: From HSCT (day 0) through 12 months post-transplant
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PTLD confirmed by tissue biopsy per WHO classification.
EBV status by EBER in situ hybridization.
Subtypes: early lesions, polymorphic, monomorphic, or classic Hodgkin lymphoma-type.
Clinical presentation, sites, and response recorded.
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From HSCT (day 0) through 12 months post-transplant
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Underlying disease relapse rate
Lasso di tempo: Day 0 to 12 months post-HSCT
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Relapse defined as recurrence of primary disease post-HSCT.
Confirmed by bone marrow (≥5% blasts), flow cytometry, cytogenetics/FISH, molecular markers, or extramedullary biopsy/imaging as indicated.
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Day 0 to 12 months post-HSCT
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EBV vaccine-induced humoral and cellular immune responses
Lasso di tempo: Pre-vaccination (baseline) and 24h post-vaccination (antibodies/T-cells); pre-vaccination and 6h, 24h post-vaccination (cytokines). Per vaccination dose.
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Immunogenicity indicators: (1) EBV-specific antibodies (VCA-IgG, EBNA1-IgG) by ELISA; (2) EBV-specific T-cell responses by IFN-γ ELISpot; (3) serum cytokines/chemokines (IL-2, IL-4, IL-6, IL-10, TNF-α, IFN-γ, MCP-1) by multiplex assay.
All samples processed at central lab.
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Pre-vaccination (baseline) and 24h post-vaccination (antibodies/T-cells); pre-vaccination and 6h, 24h post-vaccination (cytokines). Per vaccination dose.
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Non-relapse mortality (NRM)
Lasso di tempo: Cumulative NRM at day 100 and 12 months post-HSCT
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Death from any cause except relapse/progression post-HSCT.
Causes: infection, organ failure, GVHD, second malignancy, hemorrhage, other transplant-related causes.
Deaths without documented relapse included as NRM.
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Cumulative NRM at day 100 and 12 months post-HSCT
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Collaboratori e investigatori
Sponsor
Sponsor
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Inizio studio (Stimato)
Inizio studio
Completamento primario (Stimato)
Completamento primario
Completamento dello studio (Stimato)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- EBV mRNA Vaccine-0401
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