- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT07672964
CD45RA-depleted DLI for the Prevention of Viral Infections in High-risk Patients After Haploidentical Transplantation (CD45RADLIPx)
CD45RA-depleted DLI for the Prevention of Viral Infections in High-risk Patients After Transplantation: a Prospective, Multicenter, Single-arm, Pragmatic Clinical Study
The goal of this clinical trial is to learn whether giving patients a special type of donor immune cells (called CD45RA Depleted DLI) can help prevent viral infections after a stem cell transplant. It will also learn about the safety of this treatment. The main questions it aims to answer are:
Does this treatment lower the chance of getting serious viral infections after transplant? What medical problems do patients have when receiving this treatment?
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
Following allogeneic hematopoietic stem cell transplantation (allo-HSCT), delayed immune reconstitution and long-term use of immunosuppressants leave patients in a prolonged immunocompromised state, predisposing them to various infections, which represent a leading cause of transplant-related mortality. Conventional antiviral agents such as ganciclovir and valganciclovir are associated with hematologic toxicities, including neutropenia and anemia, potentially complicating post-transplant management. Meanwhile, newer antivirals such as cidofovir have not yet been approved in China, limiting patient access. Antiviral cell therapies, represented by virus-specific T cells (VSTs), are expensive and require prolonged culture periods. Therefore, there is an urgent need to identify effective strategies to prevent viral infections after HSCT, especially in high-risk patients.
Previous studies suggest that adoptive donor lymphocyte infusion (DLI) can facilitate immune reconstitution; however, the CD45RA-positive naïve T cells contained in conventional DLI are a major cause of graft-versus-host disease (GvHD). By depleting naïve T cells from donor lymphocytes ex vivo while retaining donor memory T cells (Tm), it is possible to promote post-transplant immune reconstitution without increasing the risk of GvHD. This study plans to conduct a prospective, multicenter, single-arm pragmatic clinical trial. Using the CliniMACS® cell selection system, we will selectively deplete CD45RA-positive T cells ex vivo and infuse the CD45RA-depleted donor lymphocytes (i.e., CD45RA Depleted DLI) to prevent viral infections in high-risk patients after transplantation. The efficacy, safety, and impact on post-transplant immune reconstitution of this regimen will be evaluated.
Primary objective: To evaluate the efficacy and safety of CD45RA Depleted DLI in preventing viral infections in high-risk patients after transplantation.
Secondary objective: To evaluate the impact of CD45RA Depleted DLI on immune reconstitution after transplantation.
Tipo di studio
Iscrizione (Stimato)
Fase
- Fase 1
Contatti e Sedi
Luoghi di studio
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SH
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Shanghai, SH, Cina, 200025
- Ruijin Hospital
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Contatto:
- Xiaoxia Hu, MD, PhD
- Numero di telefono: 008613795437259
- Email: hu_xiaoxia@126.com
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
- Bambino
- Adulto
Accetta volontari sani
Descrizione
Inclusion Criteria:
Participants must meet all of the following criteria:
- Patients undergoing allogeneic hematopoietic stem cell transplantation (any conditioning regimen or graft source is allowed).
- Presence of at least one high-risk factor for post-transplant viral infection (any of the following):
- Age ≥50 years or ≤14 years
- Non-sibling matched transplantation
- In vivo or ex vivo T-cell depletion
- Myeloablative conditioning
- Conditioning containing radiotherapy
- Second transplantation
- CMV IgG or EBV IgG donor/recipient mismatch (donor positive, recipient negative)
- History of grade II or higher acute graft-versus-host disease (aGVHD) after transplantation and use of high-dose corticosteroids (prednisone equivalent ≥1 mg/kg/day)
- Availability of a suitable lymphocyte donor (see "Donor Selection Criteria").
- Adequate organ function meeting the following laboratory criteria:
- Liver function: ALT and AST ≤10× upper limit of normal (ULN); total bilirubin ≤5× ULN
- Renal function: BUN and creatinine ≤1.25× ULN
- No cardiac dysfunction on electrocardiogram or echocardiogram
- Pulmonary function: oxygen saturation >90% without supplemental oxygen
- The patient or legal guardian has the desire and request to receive treatment, signs the informed consent form before treatment, and is willing to comply with the treatment plan, follow-up schedule, and laboratory tests.
Exclusion Criteria:
Patients meeting any of the following criteria will be excluded from this study:
- Active grade II-IV acute graft-versus-host disease (aGVHD)
- Active aGVHD requiring prednisone or equivalent corticosteroid >0.5 mg/kg/day
- Active viral infection
- Uncontrolled or relapsed malignancy
- Other serious acute or chronic physical or psychiatric conditions, or laboratory abnormalities, that may compromise patient safety or compliance, or affect informed consent, study participation, follow-up, or interpretation of results.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Sperimentale: Prevention Group
Prophylactic CD45RA-depleted DLI
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CD45RA Depleted DLI by ex vivo CliniMACS® prepared from mononuclear cell leukapheresis
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Cumulative Incidence of Overall Viral Infection After CD45RA-Depleted DLI
Lasso di tempo: Up to 3 months after the first CD45RA-depleted DLI, assessed at Days 14, 28, 60, and 90.
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Overall viral infection is defined as the first occurrence of any qualifying viral infection or reactivation detected by quantitative PCR after the first CD45RA-DLI infusion. Viruses assessed include CMV, EBV, ADV, BKV, HHV6, JCV, and B19. A participant will be considered to have a qualifying viral event if any of the following thresholds are met: CMV DNA ≥250 IU/mL, EBV DNA ≥250 IU/mL, ADV DNA ≥1,000 copies/mL, BKV DNA ≥5,000 copies/mL, HHV6 DNA ≥1,000 copies/mL, JCV DNA ≥1,000 copies/mL, or B19 DNA ≥1,000 copies/mL. The outcome will be reported as the cumulative incidence, expressed as the percentage of participants with at least one qualifying viral infection or reactivation event during the assessment period. |
Up to 3 months after the first CD45RA-depleted DLI, assessed at Days 14, 28, 60, and 90.
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Cumulative Incidence of Virus-Specific Infections After CD45RA-Depleted DLI
Lasso di tempo: Up to 3 months after first infusion
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Report cumulative incidence separately for CMV, EBV, ADV, BKV, HHV6, JCV, and B19 using the protocol-defined PCR thresholds.
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Up to 3 months after first infusion
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Absolute Counts of Peripheral Blood Lymphocyte Subsets as Measured by Flow Cytometry
Lasso di tempo: Up to 1 year after the first CD45RA-depleted DLI
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Immune reconstitution will be assessed by flow cytometric enumeration of peripheral blood lymphocyte subsets, including CD3+ T cells, CD4+ T cells, CD8+ T cells, CD19+ B cells, CD56+ NK cells, and CD4+CD25+CD127- regulatory T cells.
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Up to 1 year after the first CD45RA-depleted DLI
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Virus-Specific T-Cell Immune Responses After CD45RA-Depleted DLI
Lasso di tempo: Up to 3 months after the first CD45RA-depleted DLI, assessed at Days 14, 28, 60, and 90.
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Virus-specific immune reconstitution will be assessed by measuring virus-specific T-cell responses against CMV, EBV, ADV, BKV, B19, HHV6, and JCV using the protocol-defined virus-specific T-cell assay.
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Up to 3 months after the first CD45RA-depleted DLI, assessed at Days 14, 28, 60, and 90.
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Collaboratori e investigatori
Sponsor
Collaboratori
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Inizio studio (Stimato)
Completamento primario (Stimato)
Completamento dello studio (Stimato)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- RJ-BMT-Prophylaxis 1.0
Piano per i dati dei singoli partecipanti (IPD)
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Descrizione del piano IPD
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Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .
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