Mismatched Related Donor Versus Matched Unrelated Donor Stem Cell Transplantation for Children, Adolescents, and Young Adults With Acute Leukemia or Myelodysplastic Syndrome

NCT ID: NCT05457556

Last Updated: 2025-12-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE3

Total Enrollment

435 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-03-15

Study Completion Date

2026-06-30

Brief Summary

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This phase III trial compares hematopoietic (stem) cell transplantation (HCT) using mismatched related donors (haploidentical \[haplo\]) versus matched unrelated donors (MUD) in treating children, adolescents, and young adults with acute leukemia or myelodysplastic syndrome (MDS). HCT is considered standard of care treatment for patients with high-risk acute leukemia and MDS. In HCT, patients are given very high doses of chemotherapy and/or radiation therapy, which is intended to kill cancer cells that may be resistant to more standard doses of chemotherapy; unfortunately, this also destroys the normal cells in the bone marrow, including stem cells. After the treatment, patients must have a healthy supply of stem cells reintroduced or transplanted. The transplanted cells then reestablish the blood cell production process in the bone marrow. The healthy stem cells may come from the blood or bone marrow of a related or unrelated donor. If patients do not have a matched related donor, doctors do not know what the next best donor choice is. This trial may help researchers understand whether a haplo related donor or a MUD HCT for children with acute leukemia or MDS is better or if there is no difference at all.

Detailed Description

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PRIMARY OBJECTIVE:

I. To compare the 1-year cumulative incidence of severe Graft Versus Host Disease (GVHD) (from day of HCT) defined as grade III-IV acute GVHD (aGVHD) and/or chronic GVHD (cGVHD) that requires systemic immunosuppression and to compare the disease free survival (DFS) (from time of randomization) in children and young adults (AYA) with acute myeloid leukemia (AML), acute lymphoid leukemia (ALL), mixed phenotype acute leukemia (MPAL), and myelodysplastic syndrome (MDS) who are randomly assigned to haploHCT or to an 8/8 adult MUD-HCT.

SECONDARY OBJECTIVES:

I. To compare overall survival (OS) between children and AYA with AML/ALL/MPAL/MDS randomly assigned to haploHCT and MUD HCT.

II. To compare differences in health-related quality of life (HRQOL) between haploHCT and MUD HCT from baseline (pre-transplant), at 6 months, 1 year and 2 years post-transplant.

EXPLORATORY OBJECTIVES:

I. To compare the median time to engraftment and cumulative incidences of neutrophil engraftment at 30 and 100 days post transplant and platelet engraftment at 60 and 100 days post transplant, primary graft failure by 60 days, secondary graft failure at 1 year post transplant, Grade II-IV and III-IV acute graft versus host disease (aGVHD) requiring systemic immunosuppression at 100 days and 6 months, and cumulative incidences of transplant-related mortality (TRM), relapse, and moderate and severe chronic graft versus host disease (cGVHD) at 6 months, 1 and 2 years after haploHCT and MUD HCT.

II. To estimate 1 year, 18-month and 2-year cumulative incidence of graft-versus-host disease (GVHD)-free relapse-free survival (GRFS) with events defined as occurrence of any of the following from Day 0 of HCT: Grade III-IV acute GVHD, chronic GVHD requiring systemic immunosuppressive treatment, disease relapse or progression, and death from any cause.

IIa. To compare "chronic GVHD" (GRFS) after haploHCT and MUD HCT using landmark definitions.

IIb. To compare "current" GRFS is defined as the time to onset of any of the following events from Day 0 of HCT: Grade III-IV acute GVHD, chronic GVHD that is STILL requiring systemic immunosuppressive treatment, disease relapse or progression, death from any cause at 18 months and 2 years.

III. To evaluate the influence of key clinical variables: age (\<13 years and 13-21.99 years), disease (ALL/MPAL versus \[vs.\] AML/MDS), haploHCT approach (TCR alpha beta + T cell depletion vs. post-transplant cyclophosphamide \[PTCy\]); donor age (by ten-year increments), donor sex (maternal vs. paternal for parental donation), pre-HCT minimal residual disease status (MRD + vs MRD -); pediatric disease risk index (low, intermediate, and high, impact on OS and DFS only), conditioning regimen (chemotherapy based versus total-body irradiation \[TBI\] based), immunosuppressive regimen (anti-thymocyte globulin \[ATG\] exposure according to the weight and absolute lymphocyte count \[ALC\] dependent dosing approach vs no ATG exposure) time to transplant (interval between diagnosis/relapse and date of stem cell infusion) graft cell dose, use of relapse prevention therapy (yes or no) and weight on engraftment, OS, DFS, GRFS, relapse, transplant related mortality (TRM), aGvHD and cGvHD at 1 and 2 years after haplo and MUD HCT by performing stratified and multivariate analyses.

IV. To compare other important transplant related outcomes after haplo and MUD HCT, such as:

IVa. Incidence of any significant fungal infections (defined as proven or probable fungal infection) through 1 year post HCT; IVb. Incidence of viremia with or without end organ disease (i.e. cytomegalovirus \[CMV\], adenovirus, Epstein-Barr virus \[EBV\], human herpesvirus 6 \[HHV-6\], BK) requiring hospitalization and/or systemic antiviral therapy and/or cell therapy through 1 year post HCT; IVc. Incidence of sinusoidal obstruction syndrome (SOS) through 100 days post HCT; IVd. As defined by the Cairo criteria; IVe. To compare the incidence and outcome of SOS when different criteria are used (European Bone Marrow Transplant \[EBMT\], Cairo, Baltimore, and modified Seattle criteria); IVf. Incidence of transplant-associated thrombotic microangiopathy (TA-TMA) through 100 days post HCT.

V. To compare immune recovery after haplo PTCy, haplo alpha-beta T cell depletion, and MUD HCT via:

Va. Pace of reconstitution of T, B, and natural killer (NK) cells and immunoglobulins at 30 days, 60 days, 100 days, 180 days and 365 days after HCT; Vb. Response to vaccinations as determined by vaccination-specific antibody titers at 12-18 months post hematopoietic stem cell transplant (HSCT); Vc. Biobanking blood or marrow to analyze the impact of graft composition on GvHD, relapse and viremia; Vd. Biobanking whole blood and serum to compare immune recovery using extended immune phenotyping and immune functional assessments.

VI. Biobanking whole blood or serum to measure rabbit antithymocyte globulin (rATG) exposure when dosed according to weight and absolute lymphocyte count (ALC) using established pharmacokinetic and pharmacodynamics assays (after last infusion, Day -4, Day 0, Day +7).

VII. To compare resource utilization after haplo and MUD HCT. VIIa. Length of HCT hospital stay from Day 0 and readmissions within the first 100 days (number of readmissions, duration, and reason).

VIIb. Inpatient costs within the first 100 days and at 2 years post HCT. VIII. To describe and compare outcomes (neutrophil and platelet engraftment, graft failure, OS, DFS, GRFS, NRM, relapse, GvHD and health-related quality of life \[HRQOL\] post HCT) by recipient race/ethnicity, annual household income, primary spoken language and conserved transcriptional response to adversity (CTRA).

IX. To describe HRQoL outcomes in racial/ethnic minorities and compare HRQoL outcomes between White patients receiving haploHCT and racial/ethnic minority patients receiving haploHCT.

X. To assess the feasibility of incorporating total body irradiation (TBI) delivered with volumetric modulated arc therapy (VMAT) or tomotherapy into a multi-institutional study, to describe the toxicities and oncologic outcomes (relapse, DFS, OS, and TRM) of the subgroup of patients treated with this approach, and to compare these outcomes to those of patients treated with conventional TBI.

OUTLINE: Patients who have both a MUD and haplo donor are randomized to Arm A or Arm B. Patients who only have a haplo donor are nonrandomly assigned to Arm C.

ARM A: Patients receive a haplo HCT following a TBI- based or chemotherapy-based myeloablative conditioning regimen with PTCy or alpha beta T cell depletion (center's choice). When PTCy is used, it Is administered on days 3 and 4 after HCT and additional immunsouppression is started on day 5 after SCT.

ARM B: Patients receive a MUD HCT following a TBI-based or chemotherapy-based myeloablative conditioning regimen between days -9 and -2 Patients then receive GVHD prophylaxis on days 1-11.

ARM C: Patients receive a haploHCT following a TBI-based or chemotherapy-based myeloablative conditioning regimen with PTCy or alpha beta T cell depletion (center's choice). When PTCy is used, it Is administered on days 3 and 4 after HCT and additional immunsouppression is started on day 5 after SCT.

Patients in all arms undergo standard HCT screening prior to transplant including disease evaluation (lumbar puncture, bone marrow aspiration), and organ function evaluation including but not limited to echocardiogram (ECHO) or multigated acquisition scan (MUGA), PFTS, and bloodwork.Patients also undergo collection of blood throughout the trial.

After completion of study treatment, patients are followed periodically for up to 5 years from HCT.

Conditions

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Acute Lymphoblastic Leukemia Acute Myeloid Leukemia Mixed Phenotype Acute Leukemia Myelodysplastic Syndrome

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Arm A (halploHCT)

Patients receive a myeloablative conditioning regimen with PTCy or alpha beta T cell depletion at the discretion of the treating provider. Patients then undergo haploHCT on day 0. Patients undergoing myeloablative conditioning regimen with PTCy also receive GVHD prophylaxis on days 3-5. Patients undergo lumbar puncture, bone marrow aspiration, and ECHO or MUGA during screening. Patients also undergo collection of blood throughout the trial.

Group Type EXPERIMENTAL

Biospecimen Collection

Intervention Type PROCEDURE

Undergo collection of blood

Bone Marrow Aspiration

Intervention Type PROCEDURE

Undergo bone marrow aspiration

Busulfan

Intervention Type DRUG

Given intravenously (IV)

Cyclophosphamide

Intervention Type DRUG

Given IV

Echocardiography Test

Intervention Type PROCEDURE

Undergo ECHO

Fludarabine

Intervention Type DRUG

Given IV

Haploidentical Hematopoietic Cell Transplantation

Intervention Type PROCEDURE

Undergo haploHCT

Lapine T-Lymphocyte Immune Globulin

Intervention Type BIOLOGICAL

Given IV

Lumbar Puncture

Intervention Type PROCEDURE

Undergo lumbar puncture

Melphalan

Intervention Type DRUG

Given IV

Multigated Acquisition Scan

Intervention Type PROCEDURE

Undergo MUGA

Mycophenolate Mofetil

Intervention Type DRUG

Given IV

Myeloablative Conditioning

Intervention Type PROCEDURE

Receive myeloablative conditioning regimen

Quality-of-Life Assessment

Intervention Type OTHER

Ancillary studies

Questionnaire Administration

Intervention Type OTHER

Ancillary studies

Rituximab

Intervention Type BIOLOGICAL

Given IV

T-Cell Depletion Therapy

Intervention Type PROCEDURE

Undergo haploHCT with alpha beta T cell depletion

Tacrolimus

Intervention Type DRUG

Given IV

Thiotepa

Intervention Type DRUG

Given IV

Total-Body Irradiation

Intervention Type RADIATION

Undergo TBI

Arm B (MUD-HCT)

Patients receive a TBI-based or chemotherapy-based myeloablative conditioning regimen between days -9 and -2, followed by MUD-HCT on day 0. Patients then receive GVHD prophylaxis regimen on days 1-11. Patients undergo lumbar puncture, bone marrow aspiration, and ECHO or MUGA during screening. Patients also undergo collection of blood throughout the trial.

Group Type EXPERIMENTAL

Biospecimen Collection

Intervention Type PROCEDURE

Undergo collection of blood

Bone Marrow Aspiration

Intervention Type PROCEDURE

Undergo bone marrow aspiration

Busulfan

Intervention Type DRUG

Given intravenously (IV)

Cyclophosphamide

Intervention Type DRUG

Given IV

Echocardiography Test

Intervention Type PROCEDURE

Undergo ECHO

Fludarabine

Intervention Type DRUG

Given IV

Lapine T-Lymphocyte Immune Globulin

Intervention Type BIOLOGICAL

Given IV

Lumbar Puncture

Intervention Type PROCEDURE

Undergo lumbar puncture

Matched Unrelated Donor Hematopoietic Cell Transplantation

Intervention Type PROCEDURE

Undergo MUD-HCT

Methotrexate

Intervention Type DRUG

Given IV

Multigated Acquisition Scan

Intervention Type PROCEDURE

Undergo MUGA

Myeloablative Conditioning

Intervention Type PROCEDURE

Receive myeloablative conditioning regimen

Quality-of-Life Assessment

Intervention Type OTHER

Ancillary studies

Questionnaire Administration

Intervention Type OTHER

Ancillary studies

Tacrolimus

Intervention Type DRUG

Given IV

Thiotepa

Intervention Type DRUG

Given IV

Total-Body Irradiation

Intervention Type RADIATION

Undergo TBI

Arm C (haploHCT)

Patients who only have a haplo donor receive a myeloablative conditioning regimen with PTCy or alpha beta T cell depletion at the discretion of the treating provider. Patients then undergo haploHCT on day 0. Patients undergoing myeloablative conditioning regimen with PTCy also receive GVHD prophylaxis on days 3-5. Patients undergo lumbar puncture, bone marrow aspiration, and ECHO or MUGA during screening. Patients also undergo collection of blood throughout the trial.

Group Type EXPERIMENTAL

Biospecimen Collection

Intervention Type PROCEDURE

Undergo collection of blood

Bone Marrow Aspiration

Intervention Type PROCEDURE

Undergo bone marrow aspiration

Busulfan

Intervention Type DRUG

Given intravenously (IV)

Cyclophosphamide

Intervention Type DRUG

Given IV

Echocardiography Test

Intervention Type PROCEDURE

Undergo ECHO

Fludarabine

Intervention Type DRUG

Given IV

Haploidentical Hematopoietic Cell Transplantation

Intervention Type PROCEDURE

Undergo haploHCT

Lapine T-Lymphocyte Immune Globulin

Intervention Type BIOLOGICAL

Given IV

Lumbar Puncture

Intervention Type PROCEDURE

Undergo lumbar puncture

Melphalan

Intervention Type DRUG

Given IV

Multigated Acquisition Scan

Intervention Type PROCEDURE

Undergo MUGA

Mycophenolate Mofetil

Intervention Type DRUG

Given IV

Myeloablative Conditioning

Intervention Type PROCEDURE

Receive myeloablative conditioning regimen

Quality-of-Life Assessment

Intervention Type OTHER

Ancillary studies

Questionnaire Administration

Intervention Type OTHER

Ancillary studies

Rituximab

Intervention Type BIOLOGICAL

Given IV

T-Cell Depletion Therapy

Intervention Type PROCEDURE

Undergo haploHCT with alpha beta T cell depletion

Tacrolimus

Intervention Type DRUG

Given IV

Thiotepa

Intervention Type DRUG

Given IV

Total-Body Irradiation

Intervention Type RADIATION

Undergo TBI

Interventions

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Biospecimen Collection

Undergo collection of blood

Intervention Type PROCEDURE

Bone Marrow Aspiration

Undergo bone marrow aspiration

Intervention Type PROCEDURE

Busulfan

Given intravenously (IV)

Intervention Type DRUG

Cyclophosphamide

Given IV

Intervention Type DRUG

Echocardiography Test

Undergo ECHO

Intervention Type PROCEDURE

Fludarabine

Given IV

Intervention Type DRUG

Haploidentical Hematopoietic Cell Transplantation

Undergo haploHCT

Intervention Type PROCEDURE

Lapine T-Lymphocyte Immune Globulin

Given IV

Intervention Type BIOLOGICAL

Lumbar Puncture

Undergo lumbar puncture

Intervention Type PROCEDURE

Matched Unrelated Donor Hematopoietic Cell Transplantation

Undergo MUD-HCT

Intervention Type PROCEDURE

Melphalan

Given IV

Intervention Type DRUG

Methotrexate

Given IV

Intervention Type DRUG

Multigated Acquisition Scan

Undergo MUGA

Intervention Type PROCEDURE

Mycophenolate Mofetil

Given IV

Intervention Type DRUG

Myeloablative Conditioning

Receive myeloablative conditioning regimen

Intervention Type PROCEDURE

Quality-of-Life Assessment

Ancillary studies

Intervention Type OTHER

Questionnaire Administration

Ancillary studies

Intervention Type OTHER

Rituximab

Given IV

Intervention Type BIOLOGICAL

T-Cell Depletion Therapy

Undergo haploHCT with alpha beta T cell depletion

Intervention Type PROCEDURE

Tacrolimus

Given IV

Intervention Type DRUG

Thiotepa

Given IV

Intervention Type DRUG

Total-Body Irradiation

Undergo TBI

Intervention Type RADIATION

Other Intervention Names

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Biological Sample Collection Biospecimen Collected Specimen Collection 1, 4-Bis[methanesulfonoxy]butane BUS Busilvex Bussulfam Busulfanum Busulfex Busulphan CB 2041 CB-2041 Glyzophrol GT 41 GT-41 Joacamine Methanesulfonic Acid Tetramethylene Ester Methanesulfonic acid, tetramethylene ester Mielucin Misulban Misulfan Mitosan Myeleukon Myeloleukon Myelosan Mylecytan Myleran Sulfabutin Tetramethylene Bis(methanesulfonate) Tetramethylene bis[methanesulfonate] WR-19508 (-)-Cyclophosphamide 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate Asta B 518 B 518 B-518 B518 Carloxan Ciclofosfamida Ciclofosfamide Cicloxal Clafen Claphene CP monohydrate CTX CYCLO-cell Cycloblastin Cycloblastine Cyclophospham Cyclophosphamid monohydrate Cyclophosphamide Monohydrate Cyclophosphamidum Cyclophosphan Cyclophosphane Cyclophosphanum Cyclostin Cyclostine Cytophosphan Cytophosphane Cytoxan Fosfaseron Genoxal Genuxal Ledoxina Mitoxan Neosar Revimmune Syklofosfamid WR 138719 WR- 138719 WR-138719 WR138719 EC Echocardiography Fluradosa Haploidentical Stem Cell Transplantation HLA-Haploidentical Hematopoietic Cell Transplantation Stem Cell Transplantation, Haploidentical Anti-Thymocyte Globulin Rabbit Antithymocyte Globulin Rabbit Antithymocyte globulin rabbit ATG Grafalon Imtix Rabbit Anti-Human Thymocyte Globulin (RATG) Rabbit Anti-Thymocyte Globulin Rabbit Antithymocyte Globulin Rabbit ATG Thymoglobulin LP Spinal Tap MUD-HCT Alanine Nitrogen Mustard CB-3025 L-PAM L-Phenylalanine Mustard L-Sarcolysin L-Sarcolysin Phenylalanine mustard L-Sarcolysine Melphalan for Injection-Hepatic Delivery System Melphalanum Phenylalanine Mustard Phenylalanine Nitrogen Mustard Sarcoclorin Sarkolysin WR-19813 Abitrexate Alpha-Methopterin Amethopterin Brimexate CL 14377 CL-14377 Emtexate Emthexat Emthexate Farmitrexat Fauldexato Folex Folex PFS Jylamvo Lantarel Ledertrexate Lumexon Maxtrex Medsatrexate Metex Methoblastin Methotrexate LPF Methotrexate Methylaminopterin Methotrexatum Metotrexato Metrotex Mexate Mexate-AQ MTX Novatrex Rheumatrex Texate Tremetex Trexeron Trixilem WR-19039 Blood Pool Scan Equilibrium Radionuclide Angiography Gated Blood Pool Imaging Gated Heart Pool Scan MUGA MUGA Scan Multi-Gated Acquisition Scan Radionuclide Ventriculogram Scan Radionuclide Ventriculography RNV Scan RNVG SYMA Scanning Synchronized Multigated Acquisition Scanning CellCept MMF Myeloablation Myeloablative Myeloablative Cytoreduction Quality of Life Assessment ABP 798 ABP-798 ABP798 BI 695500 BI-695500 BI695500 Blitzima C2B8 Monoclonal Antibody Chimeric Anti-CD20 Antibody CT P10 CT-P10 CTP10 GP 2013 GP-2013 GP2013 IDEC 102 IDEC-102 IDEC-C2B8 IDEC-C2B8 Monoclonal Antibody IDEC102 Ikgdar Mabtas MabThera Monoclonal Antibody IDEC-C2B8 PF 05280586 PF-05280586 PF05280586 Riabni Ritemvia Rituxan Rituximab ABBS Rituximab ARRX Rituximab Biosimilar ABP 798 Rituximab Biosimilar BI 695500 Rituximab Biosimilar CT-P10 Rituximab Biosimilar GB241 Rituximab Biosimilar GP2013 Rituximab Biosimilar IBI301 Rituximab Biosimilar JHL1101 Rituximab Biosimilar PF-05280586 Rituximab Biosimilar RTXM83 Rituximab Biosimilar SAIT101 Rituximab Biosimilar SIBP-02 rituximab biosimilar TQB2303 Rituximab PVVR Rituximab-abbs Rituximab-arrx Rituximab-blit Rituximab-pvvr Rituximab-rite Rituximab-rixa Rituximab-rixi Rixathon Riximyo RTXM 83 RTXM-83 RTXM83 Ruxience Truxima T-Cell Depletion T-Lymphocyte Depletion Therapy FK 506 FK-506 FK506 Fujimycin Hecoria Prograf Protopic Tacforius 1,1',1''-Phosphinothioylidynetrisaziridine Girostan N,N', N''-Triethylenethiophosphoramide Oncotiotepa SH 105 SH-105 SH105 STEPA Tepadina Tepylute TESPA Tespamin Tespamine Thio-Tepa Thiofosfamide Thiofozil Thiophosphamide Thiophosphoamide Thiophosphoramide Thiotef Tifosyl TIO TEF Tio-tef Triethylene Thiophosphoramide Triethylenethiophosphoramide Tris(1-aziridinyl)phosphine sulfide TSPA WR 45312 SCT_TBI TBI Total Body Irradiation Whole Body Whole Body Irradiation Whole-Body Irradiation

Eligibility Criteria

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Inclusion Criteria

* 6 months to \< 22 years at enrollment
* Diagnosed with ALL, AML, or MDS or mixed phenotype acute leukemia (MPAL) for which an allogeneic hematopoietic stem cell transplant is indicated. Complete Remission (CR) status will not be confirmed at the time of enrollment. CR as defined in these sections is required to proceed with the actual HCT treatment plan
* Has not received a prior allogeneic hematopoietic stem cell transplant
* Does not have a suitable human leukocyte antigen (HLA)-matched sibling donor available for stem cell donation
* Has an eligible haploidentical related family donor based on at least intermediate resolution HLA typing

* Patients who also have an eligible 8/8 MUD adult donor based on confirmatory high resolution HLA typing are eligible for randomization to Arm A or Arm B.
* Patients who do not have an eligible MUD donor are eligible for enrollment to Arm C
* All patients and/or their parents or legal guardians must sign a written informed consent
* All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met
* Co-Enrollment on other trials

* Patients will not be excluded from enrollment on this study if already enrolled on other protocols for treatment of high risk and/or relapsed ALL, AML, MPAL and MDS. This is including, but not limited to, COG AAML1831, COG AALL1821, the EndRAD Trial, as well as local institutional trials. We will collect information on all co-enrollments
* Patients will not be excluded from enrollment on this study if receiving immunotherapy prior to transplant as a way to achieve remission and bridge to transplant. This includes chimeric antigen receptor (CAR) T cell therapy and other immunotherapies
* Karnofsky Index or Lansky Play-Performance Scale \>= 60 on pre-transplant evaluation. Karnofsky scores must be used for patients \>= 16 years of age and Lansky scores for patients =\< 16 years of age (within 4 weeks of starting therapy)
* A serum creatinine based on age/gender as follows:

6 months to \< 1 year: 0.5 mg/dL (Male); 0.5 mg/dL (Female)
1. to \< 2 years: 0.6 mg/dL (Male); 0.6 mg/dL (Female)
2. to \< 6 years: 0.8 mg/dL (Male); 0.8 mg/dL (Female)

6 to \< 10 years: 1 mg/dL (Male); 1 mg/dL (Female) 10 to \< 13 years: 1.2 mg/dL (Male); 1.2 mg/dL (Female) 13 to \< 16 years: 1.5 mg/dL (Male); 1.4 mg/dL (Female) \>= 16 years: 1.7 mg/dL (Male); 1.4 mg/dL (Female)
* OR
* A 24 hour urine Creatinine clearance \>= 60 mL/min/1.73 m\^2

* OR
* A glomerular filtration rate (GFR) \>= 60 mL/min/1.73 m\^2. GFR must be performed using direct measurement with a nuclear blood sampling method OR direct small molecule clearance method (iothalamate or other molecule per institutional standard)

* Note: Estimated GFR (eGFR) from serum creatinine, cystatin C or other estimates are not acceptable for determining eligibility
* Serum glutamic-oxaloacetic transaminase (SGOT) aspartate aminotransferase \[AST\] or serum glutamate pyruvate transaminase (SGPT) aminotransferase \[ALT\] \< 5 x upper limit of normal (ULN) for age
* Total bilirubin \< 2.5 mg/dL, unless attributable to Gilbert's Syndrome
* Shortening fraction of \>= 27% by echocardiogram or radionuclide scan (MUGA)

* OR
* Ejection fraction of \>= 50% by echocardiogram or radionuclide scan (MUGA), choice of test according to local standard of care
* Forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), and corrected carbon monoxide diffusing capability (DLCO) must all be \>= 50% of predicted by pulmonary function tests (PFTs).

* For children who are unable to perform for PFTs (e.g., due to age or developmental delay), the criteria are: no evidence of dyspnea at rest, oxygen (O2) saturation (Sat) \> 92% on room air by pulse oximetry, not on supplemental O2 at rest, and not on supplemental O2 at rest
* MPAL in first complete remission (CR1) for whom transplant is indicated. Examples include those patients who are poorly responsive to ALL therapy (end of induction failure( IF-MPAL) to ALL induction (see IF-MPAL note below), end of induction MRD ≥ 5% or end-of-consolidation MRD \> 0.01%), as well as patients treated with AML therapy
* IF-MPAL: additional criterion for Induction failure for MPAL ONLY as per ALL1732:

* An increasing number of circulating leukemia cells on 3 or more consecutive CBCs obtained at daily or longer intervals following day 8 of Induction therapy and prior to day 29 with confirmation by flow cytometry OR development of new sites of extramedullary disease, or other laboratory or clinical evidence of refractory disease or progression prior to the end of Induction evaluation (note that residual testicular disease at the end of Induction is an exception)
* MPAL in \> second complete remission (CR2)
* ALL high-risk in CR1 for whom transplant is indicated. Examples include: induction failure, treatment failure as per minimal residual disease by flow cytometry \> 0.01% after consolidation and not eligible for AALL1721 or AALL1721 not available/unwilling to enroll, hypodiploidy (\< 44 chromosomes) with MRD+ \> 0.01% after induction, persistent or recurrent cytogenetic or molecular evidence of disease during therapy requiring additional therapy after induction to achieve remission (e.g. persistent molecular BCR-ABL positivity), T cell ALL with persistent MRD \> 0.01% after consolidation.
* ALL in CR2 for whom transplant is indicated. Examples include: B-cell: early (=\< 36 months from initiation of therapy) bone marrow (BM) relapse, late BM relapse (\>= 36 months) with MRD \>= 0.1% by flow cytometry after first re-induction therapy; T or B-cell: early (\< 18 months) isolated extramedullary (IEM), late (\>= 18 months) IEM, end-Block 1 MRD \>= 0.1%; T-cell or Philadelphia chromosome positive (Ph+): BM relapse at any time
* ALL in \>= third complete remission (CR3)
* Patients treated with chimeric antigen receptor T-cells (CART) cells for whom transplant is indicated. Examples include: transplant for consolidation of CART, loss of CART persistence and/or B cell aplasia \< 6 months from infusion or have other evidence (e.g., MRD+) that transplant is indicated to prevent relapse
* AML in CR1 for whom transplant is indicated. Examples include those deemed high risk for relapse as described in AAML1831:

* FLT3/ITD+ with allelic ratio \> 0.1 without bZIP CEBPA, NPM1
* FLT3/ITD+ with allelic ratio \> 0.1 with concurrent bZIP CEBPA or NPM1 and with evidence of residual AML (MRD \>= 0.05%) at end of Induction
* Presence of RAM phenotype or unfavorable prognostic markers (other than FLT3/ITD) per cytogenetics, fluorescence in situ hybridization (FISH), next generation sequencing (NGS) results, regardless of favorable genetic markers, MRD status or FLT3/ITD mutation status
* AML without favorable or unfavorable cytogenetic or molecular features but with evidence of residual AML (MRD \>= 0.05%) at end of Induction
* Presence of a non-ITD FLT3 activating mutation and positive MRD (\>= 0.05%) at end of Induction 1 regardless of presence of favorable genetic markers.
* AML in \>= CR2
* MDS with \< 5% blasts by morphology and flow cytometry (if available) on the pre-transplant bone marrow evaluation
* Complete remission (CR) is defined as \< 5% blasts by morphology and flow cytometry (if available) on the pre-transplant bone marrow evaluation with minimum sustained absolute neutrophil count (ANC) of 300 cells/microliter for 1 week or ANC \> 500 cells/microliter. We will be collecting data from all approaches to MRD evaluation performed including NGS and polymerase chain reaction (PCR). It is strongly recommended that MPAL be evaluated using multidimensional flow cytometry and/or (KMT2Ar) qt PCR. It is strongly recommended that MPAL be evaluated using multidimensional flow cytometry and/or (KMT2Ar) qt PCR
* DONOR ELIGIBILITY CRITERIA:
* Matched Unrelated Donors:

Unrelated donor candidates must be matched at high resolution at a minimum of 8/8 alleles (HLA-A, -B, -C, -DRB1). One-antigen HLA mismatches are not permitted. HLA matching of additional alleles is recommended according to National Marrow Donor Program (NMDP) guidelines, but will be at the discretion of local centers

* Haploidentical Matched Family Members:

* Minimum match level full haploidentical (at least 5/10; HLA-A, -B, -C, -DRB1, -DQB1 alleles). The following issues (in no particular order) should be considered in choosing a haploidentical donor:

* Absent or low patient donor-specific antibodies (DSA)

* Mean fluorescence intensity (MFI) of any anti-donor HLA antibody by solid phase immunoassay should be \< 2000. Donors with higher levels are not eligible.

* If a screening assay against pooled HLA antigens is used, positive results must be followed with specificity testing using a single antigen assay. The MFI must be \< 2000 unless the laboratory has validated higher threshold values for reactivity for HLA antigens (such as HLA-C, -DQ, and -DP), that may be enhanced in concentration on the single antigen assays. Donor anti- recipient antibodies are of unknown clinical significance and do not need to be sent or reported.
* Consult with Study Chair for the clinical significance of any recipient anti-donor HLA antibody.
* If centers are unable to perform this type of testing, please contact the Study Chair to make arrangements for testing.
* If killer immunoglobulin testing (KIR) is performed: KIR status by mismatch, KIR-B, or KIR content criteria can be used according to institutional guidelines.
* ABO compatibility (in order of priority):

* Compatible or minor ABO incompatibility
* Major ABO incompatibility
* CMV serostatus:

* For a CMV seronegative recipient: the priority is to use a CMV seronegative donor when feasible
* For a CMV seropositive recipient: the priority is to use a CMV seropositive donor when feasible
* Age: younger donors including siblings/half-siblings, and second degree relatives (aunts, uncles, cousins) are recommended, even if \< 18 years
* Size and vascular access appropriate by center standard for peripheral blood stem cell (PBSC) collection if needed
* Haploidentical matched family members: screened by center health screens and found to be eligible
* Unrelated donors: meet eligibility criteria as defined by the NMDP or other unrelated donor registries. If the donor does not meet the registry eligibility criteria but an acceptable eligibility waiver is completed and signed per registry guidelines, the donor will be considered eligible for this study
* Human immunodeficiency virus (HIV) negative
* Not pregnant
* MUD donors and post-transplant cyclophosphamide haplo donors should be asked to provide BM. If donors refuse and other donors are not available, PBSC is allowed. TCR-alpha beta/CD19 depleted haplo donors must agree to donate PBSC
* Must give informed consent:

* Haploidentical matched family members: Institution standard of care donor consent and Protocol-specific Donor Consent for Optional Studies
* Unrelated donors: standard NMDP Unrelated Donor Consent

Exclusion Criteria

* Patients with genetic disorders (generally marrow failure syndromes) prone to secondary AML/ALL/MPAL with known poor outcomes because of sensitivity to alkylator therapy and/or TBI are not eligible (Fanconi Anemia, Kostmann Syndrome, Dyskeratosis Congenita, etc). Patients with Downs syndrome because of increased toxicity with intensive conditioning regimens.
* Patients with any obvious contraindication to myeloablative HCT at the time of enrollment
* Female patients who are pregnant are ineligible as many of the medications used in this protocol could be harmful to unborn children and infants
* Sexually active patients of reproductive potential who have not agreed to use an effective contraceptive method for the duration of their study participation
* Patients with uncontrolled fungal, bacterial, viral, or parasitic infections are excluded. Patients with history of fungal disease during chemotherapy may proceed if they have a significant response to antifungal therapy with no or minimal evidence of disease remaining by computed tomography (CT) evaluation
* Patients with active central nervous system (CNS) leukemia or any other active site of extramedullary disease at the time of initiation of the conditioning regimen are not permitted.

* Note: Those with prior history of CNS or extramedullary disease, but with no active disease at the time of pre-transplant workup, are eligible
* Pregnant or breastfeeding females are ineligible as many of the medications used in this protocol could be harmful to unborn children and infants
Minimum Eligible Age

6 Months

Maximum Eligible Age

21 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Children's Oncology Group

NETWORK

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Heather J Symons

Role: PRINCIPAL_INVESTIGATOR

Children's Oncology Group

Locations

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Children's Hospital of Alabama

Birmingham, Alabama, United States

Site Status

Phoenix Childrens Hospital

Phoenix, Arizona, United States

Site Status

Arkansas Children's Hospital

Little Rock, Arkansas, United States

Site Status

City of Hope Comprehensive Cancer Center

Duarte, California, United States

Site Status

Loma Linda University Medical Center

Loma Linda, California, United States

Site Status

Children's Hospital Los Angeles

Los Angeles, California, United States

Site Status

UCSF Benioff Children's Hospital Oakland

Oakland, California, United States

Site Status

Lucile Packard Children's Hospital Stanford University

Palo Alto, California, United States

Site Status

UCSF Medical Center-Mission Bay

San Francisco, California, United States

Site Status

Children's Hospital Colorado

Aurora, Colorado, United States

Site Status

Yale University

New Haven, Connecticut, United States

Site Status

Alfred I duPont Hospital for Children

Wilmington, Delaware, United States

Site Status

Children's National Medical Center

Washington D.C., District of Columbia, United States

Site Status

UF Health Cancer Institute - Gainesville

Gainesville, Florida, United States

Site Status

Nemours Children's Clinic-Jacksonville

Jacksonville, Florida, United States

Site Status

University of Miami Miller School of Medicine-Sylvester Cancer Center

Miami, Florida, United States

Site Status

Nicklaus Children's Hospital

Miami, Florida, United States

Site Status

AdventHealth Orlando

Orlando, Florida, United States

Site Status

Johns Hopkins All Children's Hospital

St. Petersburg, Florida, United States

Site Status

Lurie Children's Hospital-Chicago

Chicago, Illinois, United States

Site Status

University of Chicago Comprehensive Cancer Center

Chicago, Illinois, United States

Site Status

Riley Hospital for Children

Indianapolis, Indiana, United States

Site Status

University of Iowa/Holden Comprehensive Cancer Center

Iowa City, Iowa, United States

Site Status

Norton Children's Hospital

Louisville, Kentucky, United States

Site Status

Children's Hospital New Orleans

New Orleans, Louisiana, United States

Site Status

Johns Hopkins University/Sidney Kimmel Cancer Center

Baltimore, Maryland, United States

Site Status

C S Mott Children's Hospital

Ann Arbor, Michigan, United States

Site Status

Children's Hospital of Michigan

Detroit, Michigan, United States

Site Status

Corewell Health Grand Rapids Hospitals - Helen DeVos Children's Hospital

Grand Rapids, Michigan, United States

Site Status

Mayo Clinic in Rochester

Rochester, Minnesota, United States

Site Status

University of Mississippi Medical Center

Jackson, Mississippi, United States

Site Status

Children's Mercy Hospitals and Clinics

Kansas City, Missouri, United States

Site Status

Washington University School of Medicine

St Louis, Missouri, United States

Site Status

Hackensack University Medical Center

Hackensack, New Jersey, United States

Site Status

Roswell Park Cancer Institute

Buffalo, New York, United States

Site Status

The Steven and Alexandra Cohen Children's Medical Center of New York

New Hyde Park, New York, United States

Site Status

Laura and Isaac Perlmutter Cancer Center at NYU Langone

New York, New York, United States

Site Status

NYP/Columbia University Medical Center/Herbert Irving Comprehensive Cancer Center

New York, New York, United States

Site Status

University of Rochester

Rochester, New York, United States

Site Status

Montefiore Medical Center - Moses Campus

The Bronx, New York, United States

Site Status

New York Medical College

Valhalla, New York, United States

Site Status

Carolinas Medical Center/Levine Cancer Institute

Charlotte, North Carolina, United States

Site Status

Duke University Medical Center

Durham, North Carolina, United States

Site Status

Cleveland Clinic Foundation

Cleveland, Ohio, United States

Site Status

University of Oklahoma Health Sciences Center

Oklahoma City, Oklahoma, United States

Site Status

Penn State Children's Hospital

Hershey, Pennsylvania, United States

Site Status

Medical University of South Carolina

Charleston, South Carolina, United States

Site Status

The Children's Hospital at TriStar Centennial

Nashville, Tennessee, United States

Site Status

Vanderbilt University/Ingram Cancer Center

Nashville, Tennessee, United States

Site Status

Medical City Dallas Hospital

Dallas, Texas, United States

Site Status

UT Southwestern/Simmons Cancer Center-Dallas

Dallas, Texas, United States

Site Status

Cook Children's Medical Center

Fort Worth, Texas, United States

Site Status

Baylor College of Medicine/Dan L Duncan Comprehensive Cancer Center

Houston, Texas, United States

Site Status

Methodist Children's Hospital of South Texas

San Antonio, Texas, United States

Site Status

Primary Children's Hospital

Salt Lake City, Utah, United States

Site Status

VCU Massey Comprehensive Cancer Center

Richmond, Virginia, United States

Site Status

University of Wisconsin Carbone Cancer Center - University Hospital

Madison, Wisconsin, United States

Site Status

The Children's Hospital at Westmead

Westmead, New South Wales, Australia

Site Status

Alberta Children's Hospital

Calgary, Alberta, Canada

Site Status

British Columbia Children's Hospital

Vancouver, British Columbia, Canada

Site Status

CancerCare Manitoba

Winnipeg, Manitoba, Canada

Site Status

Hospital for Sick Children

Toronto, Ontario, Canada

Site Status

Centre Hospitalier Universitaire Sainte-Justine

Montreal, Quebec, Canada

Site Status

Countries

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United States Australia Canada

Other Identifiers

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ASCT2031

Identifier Type: -

Identifier Source: org_study_id

NCI-2022-07080

Identifier Type: REGISTRY

Identifier Source: secondary_id

ASCT2031

Identifier Type: OTHER

Identifier Source: secondary_id

ASCT2031

Identifier Type: OTHER

Identifier Source: secondary_id

U10CA180886

Identifier Type: NIH

Identifier Source: secondary_id

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