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Alfa-/beta-T-celleutarmet Bloddannende stamcelletransplantasjon fra beslektede eller ubeslektede givere for blodsykdommer hos barn og unge voksne

28. oktober 2026 oppdatert av: University of Wisconsin, Madison

TCRαβ+ og CD19+ utarmet hematopoietisk stamcelletransplantasjon fra nært samsvarende ubeslektede givere eller haploidentiske beslektede givere for hematologiske sykdommer hos barn og unge voksne

This study is being done to see if the investigators can take peripheral blood stem cells from either an adult family member or a closely matched unrelated donor, and run them through a special lab instrument to remove alpha/beta T cells and B cells and then give them to the patient to treat disease. This is an experimental way of doing a hematopoietic stem cell transplant (HSCT). The investigators want to see if the new stem cells will grow without bad graft vs. host disease (GVHD). This treatment approach is experimental in the United States.

Studieoversikt

Detaljert beskrivelse

This single institution, phase I clinical trial will determine the safety and feasibility of employing T-cell receptor (TCR) αβ+ and CD19+ (Cluster of Differentiation) depleted hematopoietic stem cell transplantation (HSCT) using peripheral blood stem cells (PBMC) from closely matched unrelated donors or haploidentical donors to treat non-malignant hematologic diseases in children and young adults. Allogeneic hematopoietic stem cell transplantation has become a curative option for children and adolescents with a variety of otherwise fatal conditions. To reduce the incidence and severity of graft-versus-host disease (GVHD) associated with allogeneic hematopoietic stem cell transplantation, donor grafts are depleted of T cells, either using CD34+ selection or CD3+/CD19+ depletion of grafts. However, these selection processes also deplete the graft of protective cell subsets, such as γδ T cells, natural killer (NK) cells, monocytes and dendritic cells, which play important roles in the immune response to infectious agents. Moreover, the presence of NK cells and γδ T cells in donor grafts is associated with more rapid immune reconstitution after HSCT transplantation. In order to retain these protective immune cell subsets, this trial will use a novel, highly selective graft engineering process using the Miltenyi CliniMACS system that selectively depletes αβ-T cells and B cells that are responsible for GVHD and Epstein Barr Virus (EBV)-related post-transplantation lymphoproliferative disorder, respectively. Prior to transplantation, patients will be treated with a conditioning regimen, specific for the original disorder.

The primary objective of this study is evaluation of the safety and feasibility of HSCT using TCRαβ+/CD19+ depleted hematopoietic stem cells to treat non-malignant hematologic diseases. This will be assessed by evaluating the incidence of graft failure, grade III-IV acute GVHD and chronic GVHD and TRM.

Secondary objectives include the evaluation of immune reconstitution and incidence of post-transplant infections, adverse events, serious adverse events, overall and disease-free survival and the efficiency of graft processing by the CliniMACS System.

Studietype

Intervensjonell

Registrering (Antatt)

12

Fase

  • Fase 1

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

  • Navn: Celeste Matsushima
  • Telefonnummer: 608-890-8069

Studer Kontakt Backup

Studiesteder

    • Wisconsin
      • Madison, Wisconsin, Forente stater, 53792
        • Rekruttering
        • American Family Children's Hospital

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

3 måneder til 25 år (Barn, Voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria:

  • No Human leukocyte antigen (HLA) identical sibling available AND

  • NO HLA matched unrelated donor available OR urgent need of HSCT precludes time necessary to search for suitable HLA matched unrelated donor AND

  • Haploidentical donor OR closely matched unrelated donor available and willing to undergo mobilization and apheresis

  • If subject has genetically confirmed inherited bone marrow failure, related donor must be evaluated for this disorder and testing must be negative.

  • If subject has sickle cell disease, donor must be unaffected or have only sickle cell trait

  • Patient must be diagnosed with one of the following diseases or disorders:

    • Hemoglobinopathies

      • Sickle Cell Disease for patients ≤ 21 years of age for whom hydroxyurea has been trialed for at least six months, and failed
      • Thalassemia Major for patients ≤ 21 years of age
    • Acquired Bone Marrow Failure Syndromes

      • Paroxysmal Nocturnal Hemoglobinuria with bone marrow failure
      • Myelodysplastic Syndromes (lower risk)
      • Severe acquired aplastic anemia
    • Inherited Bone Marrow Failure Syndromes

      • Fanconi Anemia
      • Diamond Blackfan Anemia
      • Dyskeratosis Congenita and related telomere disorders
      • Congenital Thrombocytopenia Syndromes
      • Severe Congenital Neutropenia
      • Shwachman-Diamond Syndrome
    • Inborn Errors of Immunity (IEI) or Primary Immune Regulatory Disorders (PIRD)

      • Wiskott-Aldrich syndrome (WAS)
      • Chronic granulomatous disease (CGD)
      • Severe combined immunodeficiency (SCID)
      • Primary hemophagocytic lymphohistiocytosis (HLH)
  • Age ≤ 25 years (except patients with hemoglobinopathies)

  • Life Expectancy ≥ 3 months

  • Karnofsky (patients > 16 years)/Lansky (patients ≤ 16 years) index ≥ 60

  • Organ Function Requirements

    • Renal Function

      • Creatinine clearance or radioisotope Glomerular Filtration Rate (GFR) greater than or equal to 60 ml/min/1.73m^2
    • Liver Function

      • Total bilirubin < 3 mg/dL
      • Alanine aminotransferase (ALT)/ Serum glutamic-pyruvic transaminase; synonymous with ALT (SCPT) ≤ 3 x Upper Limit of Normal (ULN) for age
    • Cardiac Function

      • Ejection fraction of > 40% by Multiple gated acquisition scan (MUGA) or echocardiogram
    • Pulmonary Function

      • No evidence of dyspnea at rest
      • No supplemental oxygen requirement
      • If measured, carbon monoxide diffusion capacity (DLCO) > 50%
  • Willing to use effective birth control method if patient is of reproductive potential

  • Informed consent obtained (patient or legal representative)

Exclusion Criteria:

  • Pregnant
  • HIV infection
  • Uncontrolled, serious active infection at screening
  • Significant serious intercurrent illnesses
  • Enrollment in any other treatment study that would interfere with the endpoints of this study according to judgement of Principal Investigator (or PI designee).

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Treatment arm

Participants will undergo a conditioning regimen, specific for the original disease, After that peripheral blood stem cell transplant from a haploidentical donor or closely matched unrelated donor, depleted of TCRαβ+ and CD19+ cells using the CliniMACS TCR α/β-biotin and CD19 Systems will be administered intravenously on Day 0 to all participants.

After undergoing a disease specific conditioning regimen (standard of care), participants will receive peripheral blood stem cell transplant from a haploidentical donor or closely matched unrelated donor, depleted of TCR αβ+ and CD19+ cells using the CliniMACS TCR α/β-biotin and CD19 Systems.

The CliniMACS Cell Selection System is based on magnetic-activated cell sorting mechanism. The CliniMACS device is a powerful tool for the isolation of many cell types from heterogeneous cell mixtures.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Incidence of grade III-IV acute graft-versus-host disease (GVHD)
Tidsramme: 100 days post transplantation

Acute GVHD will be assessed and graded according to the Keystone Consensus Criteria for staging and grading of acute graft-versus-host disease.

100 days post transplantation
Incidence of extensive chronic GVHD
Tidsramme: up to 2 years

Chronic GVHD will be assessed according to the current CIBMTR (Center for International Blood and Marrow Transplant Research) manual reflecting a grading system published by Sullivan KM (Sullivan 1981).

up to 2 years
Incidence of graft failure
Tidsramme: up to 2 years after graft

Graft failure - defined as failure to achieve ANC > 500 /µL at Day +28 or initial neutrophil engraftment followed by a decline in ANC < 500 /µL that is unresponsive to growth factor therapy (secondary graft failure).

up to 2 years after graft
Incidence of Treatment Related Mortality (TRM)
Tidsramme: Day +100 post-HSCT

TRM - defined as death from any cause other than disease progression.

Day +100 post-HSCT

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Total overlevelse (OS)
Tidsramme: opptil 2 år
opptil 2 år
CliniMACS-systemeffektivitet: prosentandel levedyktige CD34+-celler gjenvunnet etter TCRαβ+- og CD19+-uttømmingsprosedyren
Tidsramme: opptil 12 måneder etter HSCT
opptil 12 måneder etter HSCT
Korrelasjon mellom GVHD-forekomst og donormordercelle-immunoglobulinlignende reseptor (KIR) haplotypeinnhold
Tidsramme: opptil 2 år
opptil 2 år
Korrelasjon mellom GVHD forekomst og killer-cell immunoglobulin-like reseptor (KIR)/KIR-ligand mismatch mellom donor og mottaker.
Tidsramme: opptil 2 år
opptil 2 år
Antall deltakere med uønskede hendelser relatert til infusjon av HSC-transplantatet
Tidsramme: Dag 0
Dag 0
Forekomst av alvorlige uønskede hendelser
Tidsramme: opptil 2 år
opptil 2 år
CliniMACS system efficiency: log depletion value for CD19/CD20+ B cells after the TCRαβ+ and CD19+ depletion procedure
Tidsramme: Day 0
Day 0
CliniMACS system efficiency: log depletion value of TCRαβ+ T cells after the TCRαβ+ and CD19+ depletion procedure
Tidsramme: Day 0
Day 0
Time to neutrophil engraftment
Tidsramme: up to 28 days following HSCT

The time to neutrophil engraftment is defined as the post-transplant day that is the first of 3 consecutive days with an absolute neutrophil count (ANC) of >500/µL as assessed by CBC.

up to 28 days following HSCT
Time to platelet engraftment
Tidsramme: up to 28 days following HSCT

The time to platelet engraftment is defined as the post-transplant day that is the first of 3 consecutive days with a platelet count ≥ 20,000/µL as assessed by complete blood count (CBC), without platelet support (transfusion) for 7 days.

up to 28 days following HSCT
Percentage donor chimerism using Short Tandem Repeat (STR)
Tidsramme: up to 12 months following HSCT

Short tandem repeat (STR) analysis will provide the percentage donor chimerism at specific time points post-transplant.

up to 12 months following HSCT
Kinetics of lymphocyte reconstitution via immunophenotyping using flow cytometry
Tidsramme: up to 12 months following HSCT

Lymphocyte reconstitution will be assessed at specific time points post-HSCT, expressed as the percentage of white blood cells comprised of T, B and NK cell subsets.

up to 12 months following HSCT
CliniMACS system efficiency: number of viable blood cell subsets after the TCRαβ+ and CD19+ depletion procedure
Tidsramme: Day 0

Number of viable CD34+ blood stem cells, CD20+ B cells, CD3-CD56+ NK cells, TCRαβ+ T cells, and TCRγδ+ T cells in the HSC graft after the TCRαβ+ and CD19+ depletion procedure

Day 0
Event free survival
Tidsramme: up to 1 years

An event is defined as death, graft failure or stable mixed chimerism with disease recurrence.

up to 1 years
Incidence of symptomatic bacterial/fungal and viral reactivation requiring therapy
Tidsramme: up to 1 year

The incidence of infections (symptomatic bacterial/fungal and viral reactivation requiring therapy) will be used as an additional safety measure

up to 1 year

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Etterforskere

  • Hovedetterforsker: Christian Capitini, MD, University of Wisconsin, Madison
  • Studieleder: Jacques Galipeau, MD, University of Wisconsin, Madison

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. november 2026

Primær fullføring (Antatt)

1. juni 2029

Studiet fullført (Antatt)

1. juni 2030

Datoer for studieregistrering

Først innsendt

2. mars 2021

Først innsendt som oppfylte QC-kriteriene

16. mars 2021

Først lagt ut (Faktiske)

19. mars 2021

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

29. oktober 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

28. oktober 2026

Sist bekreftet

1. september 2026

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • 2020-1251
  • A536755 (Annen identifikator: UW Madison)
  • UW19113 (Annen identifikator: OnCore ID)
  • 2020-1251 (Annen identifikator: HS IRB UW Madison)
  • NCI-2021-02128 (Registeridentifikator: NCI CTRP)
  • Protocol Version 6 (Annen identifikator: HS-IRB UW Madison)

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

JA

IPD-planbeskrivelse

The Principal Investigator, Sponsor and funding institutions (if applicable) will ensure that all mechanisms used to share data include proper plans and safeguards to protect the rights and privacy of participants who participate in this research.

IPD-deling Støtteinformasjonstype

  • STUDY_PROTOCOL
  • SEVJE

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Ja

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