CClinicalTrials.gg
CompletedNCT04965597Updated Mar 9, 2026

Treosulfan-Based Conditioning Regimen Before a Blood or Bone Marrow Transplant for the Treatment of Bone Marrow Failure Diseases (BMT CTN 1904)

A Phase 2 interventional study of Treosulfan and Fludarabine Phosphate in Bone Marrow Failure Syndrome, Congenital Amegakaryocytic Thrombocytopenia and Diamond-Blackfan Anemia, sponsored by Fred Hutchinson Cancer Center. Completed at 24 sites in United States. Open to participants aged 1 Year to 49 Years. Per ClinicalTrials.gov, last updated 2026-03-09.

Sponsored by Fred Hutchinson Cancer Center · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
40
Allocation
Not applicable
Ages
1 Year to 49 Years
Sex
All
01

Study summary

This phase II trial tests whether treosulfan, fludarabine, and rabbit antithymocyte globulin (rATG) work when given before a blood or bone marrow transplant (conditioning regimen) to cause fewer complications for patients with bone marrow failure diseases. Chemotherapy drugs, such as treosulfan, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Fludarabine may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. rATG is used to decrease the body's immune response and may improve bone marrow function and increase blood cell counts. Adding treosulfan to a conditioning regimen with fludarabine and rATG may result in patients having less severe complications after a blood or bone marrow transplant.

Read the detailed description

OUTLINE:

CONDITIONING REGIMEN: Patients receive treosulfan intravenously (IV) over 120 minutes on days -6 to -4, fludarabine phosphate IV over 60 minutes on days -6 to -2, and lapine T-lymphocyte immune globulin (rATG) IV over 4-6 hours on days -4 to -2.

TRANSPLANTATION: Patients undergo bone marrow or peripheral blood stem cell transplant on day 0.

GVHD PROPHYLAXIS: Patients receive tacrolimus IV continuously beginning on day -2 and a taper beginning on day 180. Patients may also receive tacrolimus orally (PO). Patients also receive methotrexate IV on days 1, 3, 6, and 11.

Patients undergo echocardiography (ECHO) or multigated acquisition scan (MUGA) as well as possible chest radiography (x-ray) or computed tomography (CT) at baseline and undergo bone marrow biopsy and aspiration at baseline and follow up. Patients also undergo blood sample collection throughout the trial.

After completion of study treatment, patients are followed up at 1 year from transplant.

02

Conditions studied

  • Bone Marrow Failure Syndrome
  • Congenital Amegakaryocytic Thrombocytopenia
  • Diamond-Blackfan Anemia
  • Hereditary Sideroblastic Anemia
  • Paroxysmal Nocturnal Hemoglobinuria
  • Shwachman-Diamond Syndrome
  • Hematologic Neoplasm With Germline GATA2 Mutation
  • Hematologic Neoplasm With Germline SAMD9 Mutation
  • Hematologic Neoplasm With Germline SAMD9L Mutation

Keywords

  • Bone Marrow Failure Disorders
  • HSCT
  • Treosulfan
  • Unrelated donor
  • Matched donor
  • mismatched donor
  • transplant
03

In context

Bone Marrow Failure Disorders

85 studies on the registry are indexed under Bone Marrow Failure Disorders; 33 are open to participants now.

This study's enrollment of 40 is above the median of 24 across 62 interventional studies indexed under Bone Marrow Failure Disorders.

Browse Bone Marrow Failure Disorders studies →

Lead sponsor

Fred Hutchinson Cancer Center is the lead sponsor of 537 studies on the registry; 79 are open to participants now.

Of its 57 completed or terminated interventional studies of FDA-regulated products, 45 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
1 Year to 49 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patient must be >= 1.0 year of age and less than 50.0 years of age at the time of enrollment (i.e. patient must have celebrated their 1st birthday when enrolled and must NOT have celebrated their 50th birthday when enrolled; 49.99 years)
  • Underlying BMFD treatable by allogenic HCT
  • Shwachman-Diamond syndrome

    • Criteria for Diagnosis:

      • A pathogenic mutation(s) for Shwachman-Diamond syndrome
      • For those patients tested but lacking a genetic mutation they must meet both *** criteria below:

        • Exocrine pancreatic dysfunction as defined by at least one of the following:

          • Pancreatic isoamylase below normal (age >= 3 years old), OR
          • Fecal elastase \< 200, AND
        • Bone marrow failure as evidence by at least one of the following:

          • Intermittent or persistent neutropenia (absolute neutrophil count \< 1,500/uL), OR
          • Hypo-productive anemia with a hemoglobin concentration below the age-related adjusted norms, OR
          • Unexplained macrocytosis, OR
          • Platelet count \< 150,000/uL without alternative etiology, OR
          • Hypocellular bone marrow
    • Indications for HCT:

      • Severe neutropenia (absolute neutrophil count [ANC] \< 500/uL), OR
      • Severe anemia (hemoglobin \< 8 g/dL) or transfusion-dependent anemia, OR
      • Severe thrombocytopenia (platelet count \< 20,000/uL) or transfusion-dependent thrombocytopenia, OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 eligibility review committee (ERC). In addition, patients with severe or recurrent infections will be reviewed by the ERC if they do not meet the indications for transplant listed above
  • Diamond Blackfan Anemia

    • Criteria for Diagnosis:

      • A pathogenic mutation for Diamond Blackfan anemia
      • For those patients tested but lacking a genetic mutation the patient must meet the first *** criteria and at least one of the subsequent *** criteria listed below:

        • History of deficiency of erythroid precursors in an otherwise cellular bone marrow AND,
        • Reticulocytopenia, OR
        • Elevated adenosine deaminase activity, OR
        • Elevated hemoglobin F, OR
        • Macrocytosis, OR
        • Congenital anomalies
    • Indications for HCT:

      • Red blood cell (RBC) transfusion dependent anemia despite an adequate trial of steroids; OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 ERC
  • Congenital Sideroblastic anemia

    • Criteria for Diagnosis:

      • A pathogenic mutation(s) for sideroblastic anemia
      • For those patients tested but lacking a genetic mutation:

        • Presence of ringed sideroblasts in the bone marrow excluding acquired causes of ringed sideroblasts such as lead poisoning \& zinc toxicity
    • Indications for HCT:

      • Severe anemia (hemoglobin \< 8 g/dL) or transfusion-dependent anemia OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 ERC
  • GATA2 mutation with associated marrow failure

    • Criteria for Diagnosis:

      ** A pathogenic mutation(s) for GATA2

    • Indications for HCT:

      • Severe neutropenia (ANC \< 500/uL), OR
      • Severe anemia (hemoglobin \< 8 g/dL) or transfusion-dependent anemia, OR
      • Severe thrombocytopenia (platelet count \< 20,000/uL) or transfusion-dependent thrombocytopenia, OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 ERC. In addition, patients with severe or recurrent infections will be reviewed by the ERC if they do not meet indications for transplant listed above
  • SAMD9 or SAMD9L disorders

    • Criteria for Diagnosis:

      ** A pathogenic mutation(s) for SAMD9 or SAMD9L

    • Indications for HCT:

      • Severe neutropenia (ANC \< 500/uL), OR
      • Severe anemia (hemoglobin \< 8 g/dL) or transfusion-dependent anemia, OR
      • Severe thrombocytopenia (platelet count \< 20,000/uL) or transfusion-dependent thrombocytopenia, OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 ERC
  • Congenital amegakaryocytic thrombocytopenia

    • Criteria for Diagnosis:

      • A pathogenic mutation(s) for congenital amegakaryocytic thrombocytopenia.
      • For those patients tested but lacking a genetic mutation the patient must meet criteria below:

        • Thrombocytopenia early in life, AND
        • History of bone marrow demonstrating megakaryocyte hypoplasia
    • Indications for HCT:

      • Severe thrombocytopenia (platelet count \< 20,000/uL) or transfusion-dependent thrombocytopenia, OR
      • Neutropenia defined as an ANC \< 500/uL, OR
      • Severe anemia (hemoglobin \< 8 g/dL) or transfusion-dependent anemia, OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 ERC
  • Paroxysmal nocturnal hemoglobinuria

    • Criteria for Diagnosis:

      • Paroxysmal nocturnal hemoglobinuria (PNH) clone size in granulocytes >= 10%, AND
      • Complement mediated intravascular hemolysis with an elevated LDH (above institutional upper limits of normal)
    • Indications for HCT:

      • PNH with thrombosis despite adequate medical management, OR
      • PNH with intravascular hemolysis requiring transfusion support despite adequate medical management, OR
      • Additional clinical or laboratory data may be considered for protocol eligibility following review by protocol 1904 ERC. In addition, patients with PNH and cytopenias may be considered for the protocol eligibility following review by protocol 1904 ERC
  • An undefined BMFD: a patient with a BMFD for whom a genetic mutation responsible for their bone marrow failure phenotype has not been identified (excluding PNH) will be eligible for this clinical trial following approval by Blood and Marrow Transplant Clinical Trials Network (BMT CTN) 1904 ERC

    * A BMFD with a known genetic mutation but not listed above will be eligible for this clinical trial following approval by BMT CTN 1904 ERC

  • Patient and/or legal guardian must sign informed consent prior to initiation of conditioning for BMT CTN 1904
  • Note: The following patients MUST be reviewed by the BMT CTN 1904 ERC in order to determine if they are eligible for this trial:

    • All patients with Shwachman-Diamond syndrome, Diamond Blackfan anemia, congenital sideroblastic anemia, and congenital amegakaryocytic thrombocytopenia who have had genetic testing and a genetic mutation responsible for their disease was not identified
    • All patients with an undefined BMFD: a patient with a BMFD for whom a genetic mutation responsible for their bone marrow failure phenotype has not been identified, excluding PNH
    • All patients with a BMFD and a known genetic mutation that is not listed above
    • All patients with GATA2 mutation and associated marrow failure
    • All patients with SAMD9 or SAMD9L disorders
    • There may be circumstances where a treating physician will consider a transplant for a patient with a BMFD who does not meet all the criteria listed under "indications for HCT". In these situations, treating physicians may submit their patient to the BMT CTN 1904 ERC for review in order to determine if the patient is eligible for this clinical trial based on additional clinical or laboratory information
    • Many patients with BMFD can have bone marrow evaluations that raise concern for possible myelodysplastic syndrome (MDS) including but not limited to dysplastic bone marrow evaluations or cytogenetic abnormalities. However, in patients BMFD these findings are not necessarily diagnostic or consistent with MDS. Therefore, given the complexities of diagnosing MDS in patients with BMFD, all patients with bone marrow evaluations concerning for possible MDS should be submitted to the ERC for review to confirm or exclude MDS. This is particularly important as we do not want to exclude potentially eligible patients due to an incorrect diagnosis of MDS
  • HLA-MATCHED RELATED DONOR: HLA-matched sibling: Must be a minimum HLA-6/6 matched to the recipient at HLA-A, -B (serologic typing) and DRB1 (high-resolution typing)
  • HLA-MATCHED RELATED DONOR: HLA-matched related (phenotypic match): Fully matched for HLA-A, -B, -C, -DRB1, and DQB1 by high-resolution typing.
  • HLA-MATCHED RELATED DONOR: If a genetic mutation is known for the patient, the HLA-matched related donor [either HLA-matched sibling or HLA-matched related (phenotypic match)] must be screened for the same genetic mutation if clinically appropriate and should be confirmed to not have the same genetic disease (this does not include patients with PNH). Consult the protocol team with questions
  • HLA-MATCHED RELATED DONOR: If a patient has an undefined BMFD (a patient with a BMFD for whom a genetic mutation responsible for their bone marrow failure phenotype has not been identified), the HLA-matched related donor [either HLA-matched sibling or HLA-matched related (phenotypic match)] must have an evaluation as directed by the treating physician to confirm that the donor does not have the same underlying disease. This will include a complete blood count (CBC) with differential and potentially a bone marrow evaluation or other studies as directed by the treating physician
  • UNRELATED DONOR: Fully matched for HLA-A, -B, -C, -DRB1, and DQB1 by high-resolution typing OR
  • UNRELATED DONOR: Mismatched for a single HLA-class 1 allele (HLA-A, -B, or -C) by high-resolution typing; OR
  • UNRELATED DONOR: Mismatched for a single HLA DQB1 allele or antigen by high-resolution typing

    * Note: donor patient (DP) matching per institutional practice

  • DONOR SELECTION RECCOMENDATIONS: in the case where there are multiple donor options, donors should be selected based on the following priority numbered below:

    • Unaffected fully HLA-matched sibling
    • Unaffected fully phenotypically HLA-matched related donor
    • Fully HLA-matched unrelated donor
    • Unrelated donor with single allele or antigen level mismatch at DQB1
    • Unrelated donor with single allele level mismatch at class 1 (HLA-A, -B, or -C)

Exclusion criteria

Exclusion Criteria:

  • Patients with idiopathic aplastic anemia, Fanconi anemia, dyskeratosis congenita, and congenital neutropenia
  • Patients with MDS as defined by the World Health Organization (WHO) or leukemia
  • Prior allogeneic HCT
  • Patient's weight =\< 10.0 kg (actual body weight and adjusted body weight) at time of study enrollment
  • Lansky (patients \< 16 years of age) or Karnofsky (patients >= 16 years of age) performance \< 70%
  • Left ventricular ejection fraction \< 50% by echocardiogram or multi-gated acquisition (MUGA) scan

    * For patients unable to obtain a left ventricular ejection fraction, left ventricular shortening fraction of \< 26%

  • Diffusing capacity of the lungs for carbon monoxide (DLCO) (corrected/adjusted for hemoglobin) \< 50%, forced expiratory volume (FEV)1 \< 50% predicted, and forced vital capacity (FVC) \< 50% predicted
  • For patients unable to perform pulmonary function tests (PFTs) due to age or developmental delay: oxygen (O2) saturation \< 92% on room air
  • On supplemental oxygen
  • Estimated creatinine clearance \< 60 mL/minute/1.73m\^2 (estimated per institutional practice)
  • Dialysis dependent
  • Conjugated bilirubin > 2 x upper limit of normal for age (ULN, unless attributable to Gilbert's syndrome)
  • Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) > 4 x ULN for age, or
  • Fulminant liver failure or cirrhosis
  • Iron overload - This exclusion criterion only applies to patients who are considered at risk for hepatic or cardiac iron overload. Therefore, not all patients enrolled on this protocol will undergo formal hepatic or cardiac iron assessment

    * For patients with a history of significant transfusions defined as >= 8 packed red blood cell transfusions per year for >= 1 year or have received >= 20 packed red blood cell transfusions (lifetime cumulative) will require formal hepatic and cardiac iron measurement. In addition, patients with a prior history of hepatic or cardiac iron overload will also require formal assessment for iron overload. Patients are excluded if:

    • Hepatic iron content >= 8 mg Fe/g dry weight by liver magnetic resonance imaging (MRI) using a validated methodology (such as T2 * MRI or ferriscan) or liver biopsy per institutional practice
    • Cardiac iron content \< 25 msec by cardiac T2 * MRI
  • Uncontrolled bacterial infection within 1 week of study enrollment. Uncontrolled is defined as currently taking medication with no clinical improvement or progression on adequate medical treatment
  • Uncontrolled viral or fungal infection within 30 days of study enrollment. Uncontrolled is defined as currently taking medication with no clinical improvement or progression on adequate medical treatment
  • Positive for human immunodeficiency virus (HIV)
  • Presence of clinically significant anti-donor human leukocyte antigen (HLA)-antibodies per institutional practice
  • Prior solid organ transplant
  • Patients with prior malignancies except resected non-melanoma skin cancer or treated cervical carcinoma in situ
  • Females who are pregnant or breast-feeding
  • Females and males of childbearing potential who are unwilling to practice an effective method of contraception or agree to abstinence from the time of signing informed consent through 12 months post-transplant or off tacrolimus whichever is later
  • Known hypersensitivity to treosulfan or fludarabine
  • Known life-threatening reaction (i.e. anaphylaxis) to Thymoglobulin that would prohibit use for the patient as this study requires use of the Thymoglobulin preparation of anti-thymocyte globulin (ATG)
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
40 participants (actual)

Study arms

  • Experimental
    Treatment (conditioning regimen; transplant; GVHD prophylaxis)

    CONDITIONING REGIMEN: Patients receive treosulfan IV over 120 minutes on days -6 to -4, fludarabine phosphate IV over 60 minutes on days -6 to -2, and rATG IV over 4-6 hours on days -4 to -2. TRANSPLANTATION: Patients undergo bone marrow or peripheral blood stem cell transplant on day 0. GVHD PROPHYLAXIS: Patients receive tacrolimus IV continuously beginning on day -2 and a taper beginning on day 180. Patients may also receive tacrolimus PO. Patients also receive methotrexate IV on days 1, 3, 6, and 11. Patients undergo ECHO or MUGA as well as possible x-ray or CT at baseline and undergo bone marrow biopsy and aspiration at baseline and follow up. Patients also undergo blood sample collection throughout the trial.

    Drug: Treosulfan · Drug: Fludarabine Phosphate · Drug: Tacrolimus · Drug: Methotrexate · Biological: Lapine T-Lymphocyte Immune Globulin · Procedure: Peripheral Blood Stem Cell Transplantation · Procedure: Allogeneic Bone Marrow Transplantation · Other: Quality-of-Life Assessment · Procedure: Echocardiography · Procedure: Multigated Acquisition Scan · Procedure: Bone Marrow Biopsy · Procedure: Bone Marrow Aspiration · Procedure: Biospecimen Collection · Procedure: X-Ray Imaging · Procedure: Computed Tomography

Interventions

  • DrugTreosulfan

    Given IV

    Also known as: Dihydroxybusulfan, Ovastat, Treosulphan, Tresulfon, Trecondi

  • DrugFludarabine Phosphate

    Given IV

    Also known as: 2-fluoro-9-(5-O-phosphono-.beta.-D-arabinofuranosyl)-, 9H-purin-6-amine, 2-fluoro-9-(5-O-phosphono-beta-D-arabinofuranosyl), Beneflur, Fludara, Fludarabine-5'-Monophosphate, SH T 586

  • DrugTacrolimus

    Given IV and PO

    Also known as: FK 506, Fujimycin, Hecoria, Prograf, Protopic

  • DrugMethotrexate

    Given IV

    Also known as: Abitrexate, Alpha-Methopterin, Amethopterin, Brimexate, Emthexat, Emtexate, Farmitrexat, Methotrexate LPF, Methylaminopterin, Methotrexatum, Metotrexato, Novatrex, Rheumatrex, Texate, Tremetex, Trexeron, Trixilem, WR-19039

  • BiologicalLapine T-Lymphocyte Immune Globulin

    Given IV

    Also known as: Anti-Thymocyte Globulin Rabbit, Grafalon, Rabbit Anti-Human Thymocyte Globulin (RATG), Rabbit Anti-Thymocyte Globulin, Rabbit Antithymocyte Globulin, Rabbit ATG, rATG, Thymoglobulin, Antithymocyte globulin rabbit ATG, Imtix

  • ProcedurePeripheral Blood Stem Cell Transplantation

    Undergo PBSC

    Also known as: PBPC transplantation, PBSCT, Peripheral Blood Progenitor Cell Transplantation, PERIPHERAL BLOOD STEM CELL TRANSPLANT, peripheral stem cell support, Peripheral Stem Cell Transplant, peripheral stem cell transplantation

  • ProcedureAllogeneic Bone Marrow Transplantation

    Undergo bone marrow transplant

    Also known as: Allo BMT, Allogeneic Blood and Marrow Transplantation, Allogeneic BMT

  • OtherQuality-of-Life Assessment

    Ancillary studies

    Also known as: Quality of Life Assessment

  • ProcedureEchocardiography

    Undergo ECHO

    Also known as: EC

  • ProcedureMultigated Acquisition Scan

    Undergo MUGA

    Also known as: Blood Pool Scan, Equilibrium Radionuclide Angiography, Gated Blood Pool Imaging, Gated Heart Pool Scan, MUGA, Multi-Gated Acquisition Scan, MUGA Scan, Radionuclide Ventriculogram Scan, Radionuclide ventriculography, RNVG, SYMA Scanning, Synchronized Multigated Acquisition Scanning

  • ProcedureBone Marrow Biopsy

    Undergo bone marrow biopsy and aspiration

  • ProcedureBone Marrow Aspiration

    Undergo bone marrow biopsy and aspiration

  • ProcedureBiospecimen Collection

    Undergo blood sample collection

    Also known as: Biological Sample Collection

  • ProcedureX-Ray Imaging

    Undergo chest x-ray

    Also known as: Conventional X-Ray, Diagnostic Radiology

  • ProcedureComputed Tomography

    Undergo chest CT

    Also known as: Computed Axial Tomography, CAT Scan, CT Scan

06

What researchers measure

Primary outcomes

  1. Graft-Versus Host-Disease (GVHD)-Free Event-Free Survival (EFS)

    The primary endpoint is the incidence of 1-year GVHD free, EFS (GEFS). An event is defined as death due to any cause, primary or secondary graft failure/rejection, or 2nd HCT whichever occurs first. Grade III-IV acute GVHD and chronic GVHD (using National Institutes of Health \[NIH\] consensus criteria) requiring systemic immune suppression will be considered in this estimate.

    Time frame: 1 year post-HCT

Secondary outcomes

  1. Overall Survival

    Overall survival at day 100 after HCT

    Time frame: Day 100 post-HCT

  2. Overall Survival

    Overall survival at 6 months after HCT

    Time frame: 6 months post-HCT

  3. Overall Survival

    Overall survival at 1 year after HCT

    Time frame: 1 year post-HCT

  4. Event-Free Survival

    Event-free survival will be estimated at 12 months after HCT. An event is defined as death due to any cause, primary or secondary graft failure/rejection, or 2nd HCT, whichever occurs first

    Time frame: 1 year post-HCT

  5. Hematologic Recovery: Neutrophil recovery

    Hematologic recovery will be assessed according to neutrophil recovery after transplant. Neutrophil recovery is defined as achieving an absolute neutrophil count (ANC) ≥ to 500/mm3 for 3 consecutive measurements on 3 different days. The first of the three days will be designated the day of neutrophil recovery. The competing event is death without neutrophil recovery.

    Time frame: Assessed up to 1 year post-HCT

  6. Hematologic Recovery: Platelet recovery

    Hematologic recovery will be assessed according to platelet counts recovery after transplant. Platelet recovery is defined as the first day of a minimum of 3 days that the patient has a sustained platelet count ≥ 20,000/mm3 with no platelet transfusions in the preceding 7 days. The first day of sustained platelet count above these thresholds will be designated the day of platelet engraftment.

    Time frame: Day 100 post-HCT

  7. Donor Chimerism (CD3 and Myeloid)

    Proportions of patients with full (\>95%), mixed (5-95%), or rejection (\<5%) myeloid

    Time frame: Day 28 post-HCT

  8. Donor Chimerism (CD3 and Myeloid)

    Proportions of patients with full (\>95%), mixed (5-95%), or rejection (\<5%) myeloid

    Time frame: Day 100 post-HCT

  9. Donor Chimerism (CD3 and Myeloid)

    Proportions of patients with full (\>95%), mixed (5-95%), or rejection (\<5%) myeloid

    Time frame: 1 year post-HCT

  10. Primary graft failure/rejection

    Defined as never achieving ANC ≥ 500/μL or never achieving ≥ 5% donor myeloid chimerism assessed by peripheral blood chimerism assays by day +42 post-HCT. Second infusion of hematopoietic cells is also considered indicative of primary graft failure by day +42 post-HCT

    Time frame: Day 42 post-HCT

  11. Secondary graft failure/rejection post-HCT

    Defined as \< 5% donor myeloid chimerism in peripheral blood beyond day +42 post-HCT in patients with prior documentation of hematopoietic recovery with ≥ 5% donor cells by day +42 post-HCT. Second infusion of hematopoietic cells is also considered indicative of secondary graft failure.

    Time frame: Assessed up to 1 year post-HCT

  12. Grade II-IV and grade III-IV GVHD at day 100

    The cumulative incidences of acute grade II-IV and III-IV GVHD at day 100 after HCT will be determined.

    Time frame: Day 100 post-HCT

  13. Grade II-IV and grade III-IV GVHD at day 180

    The cumulative incidences of acute grade II-IV and III-IV GVHD at day 100 after HCT will be determined.

    Time frame: Day 180 post-HCT

  14. Chronic GVHD

    The cumulative incidence of chronic GVHD (using NIH consensus criteria) requiring systemic immune suppression at 1 year after HCT will be determined. Data will be collected directly from providers and chart review as defined by the NIH Consensus Conference Criteria

    Time frame: 1 year post-HCT

  15. Incidence of grade 3-5 toxicities

    Grade 3-5 toxicities by day 30 after HCT

    Time frame: Day 30 post-HCT

  16. Incidence of grade 3-5 toxicities

    Grade 3-5 toxicities by day 100 after HCT

    Time frame: Day 100 post-HCT

  17. Incidence of grade 2-3 systemic infections

    All microbiologically documented infections or significant infections requiring antibiotic/antifungal therapy occurring up to 6 months after HCT

    Time frame: 6 months post-HCT

  18. Incidence of Epstein Barr virus (EBV) reactivation requiring therapy

    The incidence of EBV reactivation requiring therapy in the first 180 days after HCT, and of EBV-associated lymphoproliferative disorder in the first 180 days after HCT will be evaluated.

    Time frame: Day 180 post-HCT

  19. Incidence of EBV-associated lymphoproliferative disorder

    Time frame: Day 180 post-HCT

  20. Incidence of cytomegalovirus (CMV) reactivation requiring therapy by day 180 post-HCT

    Time frame: Up to day 180 post-HCT

07

Study locations

24 sites
  • Children's Hospital Los Angeles
    Los Angeles, California 90027, United States
  • Rady Children's Hospital/UCSD
    San Diego, California 92123, United States
  • University of California San Francisco
    San Francisco, California 94143, United States
  • Children's Hospital Colorado
    Aurora, Colorado 80045, United States
  • Children's Healthcare of Atlanta
    Atlanta, Georgia 30329, United States
  • Johns Hopkins University
    Baltimore, Maryland 21231, United States
  • Boston Children's Hospital
    Boston, Massachusetts 02115, United States
  • University of Michigan Medical Center
    Ann Arbor, Michigan 48109, United States
  • University of Minnesota
    Minneapolis, Minnesota 55455, United States
  • St. Louis Children's Hospital
    St Louis, Missouri 63110, United States
  • Roswell Park Comprehensive Cancer Center
    Buffalo, New York 14203, United States
  • Memorial Sloan Kettering Cancer Center
    New York, New York 10065, United States
  • Cohen Children's Hospital of NY
    Queens, New York 11040, United States
  • Duke University Medical Center
    Durham, North Carolina 27705, United States
  • Cincinnati Children's Hospital
    Cincinnati, Ohio 45229, United States
  • Nationwide Children's Hospital
    Columbus, Ohio 43205, United States
  • Oregon Health & Science University
    Portland, Oregon 97239, United States
  • Children's Hospital of Philadelphia
    Philadelphia, Pennsylvania 19104, United States
  • Vanderbilt University Medical Center
    Nashville, Tennessee 37232, United States
  • MD Anderson Cancer Center
    Houston, Texas 77030, United States
  • Texas Children's Hospital
    Houston, Texas 77030, United States
  • Primary Children's/University of Utah
    Salt Lake City, Utah 84113, United States
  • Fred Hutch/University of Washington Cancer Consortium
    Seattle, Washington 98109, United States
  • Medical College of Wisconsin/Children's Hospital of Wisconsin
    Milwaukee, Wisconsin 53226, United States
08

References and documents

Study documents

  • Informed consent form · May 24, 2024

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 9, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04965597
Lead sponsor
Fred Hutchinson Cancer Center
Collaborators
Blood and Marrow Transplant Clinical Trials Network, National Cancer Institute (NCI), National Marrow Donor Program, National Heart, Lung, and Blood Institute (NHLBI)
Responsible party
Sponsor
First posted
Jul 16, 2021
Start date
Apr 19, 2022
Primary completion
Feb 18, 2026
Completion
Feb 18, 2026
Last update
Mar 9, 2026

Study contacts

Lauri Burroughs, MD
study chair · Fred Hutch/University of Washington Cancer Consortium
Margaret MacMillan, MD
study chair · University of Minnesota

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2026. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion