Selective Depletion of CD45RA+ T Cells From Allogeneic Peripheral Blood Stem Cell Grafts From HLA-Matched Related and Unrelated Donors in Preventing GVHD

NCT02220985 — Phase 2, Completed, 84 participants, Fred Hutchinson Cancer Center

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A Phase II Study Evaluating Selective Depletion of CD45RA+ T Cells From Allogeneic Peripheral Blood Stem Cell Grafts From HLA-Matched Related and Unrelated Donors for Prevention of GVHD

RegistryNCT02220985
StatusCompleted
PhasePhase 2
Study typeInterventional; non randomized, parallel, masking: none, treatment
Enrollment84 (Actual)
SponsorFred Hutchinson Cancer Center (Other); collaborators: National Cancer Institute (NCI), National Heart, Lung, and Blood Institute (NHLBI)
ConditionsAccelerated Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive, Acute Biphenotypic Leukemia, Acute Leukemia of Ambiguous Lineage, Acute Undifferentiated Leukemia, Allogeneic Hematopoietic Stem Cell Transplant Recipient, Blast Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive, Blastic Plasmacytoid Dendritic Cell Neoplasm, Childhood Acute Lymphoblastic Leukemia in Remission, Childhood Acute Myeloid Leukemia in Remission, Donor, Lymphoblastic Lymphoma, Myelodysplastic Syndrome With Excess Blasts, Myelodysplastic Syndrome With Excess Blasts-1, Myelodysplastic Syndrome With Excess Blasts-2, Recurrent Acute Lymphoblastic Leukemia, Recurrent Acute Myeloid Leukemia, Recurrent Childhood Acute Lymphoblastic Leukemia, Recurrent Childhood Acute Myeloid Leukemia, Recurrent Chronic Myelogenous Leukemia, BCR-ABL1 Positive, Refractory Acute Lymphoblastic Leukemia, Refractory Acute Myeloid Leukemia, Acute Lymphoblastic Leukemia in Remission, Acute Myeloid Leukemia in Remission
InterventionsAllogeneic Hematopoietic Stem Cell Transplantation, Cyclophosphamide, Fludarabine Phosphate, Laboratory Biomarker Analysis, Methotrexate, Mycophenolate Mofetil, Peripheral Blood Stem Cell Transplantation, Tacrolimus, Thiotepa, Total-Body Irradiation (Procedure, drug, other, radiation)
Datesstart 2015-03-23, primary completion 2025-04-01, completion 2025-05-01, first posted 2014-08-20, last updated 2026-06-01
Locations2 sites in United States

Related Papers Related Patents Related Grants Related Experts
All trials for Accelerated Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive All trials for Acute Biphenotypic Leukemia All trials of Allogeneic Hematopoietic Stem Cell Transplantation All trials of Cyclophosphamide

-Summary

This phase II trial is for patients with acute lymphocytic leukemia, acute myeloid leukemia, myelodysplastic syndrome or chronic myeloid leukemia who have been referred for a peripheral blood stem cell transplantation to treat their cancer. In these transplants, chemotherapy and total-body radiotherapy ('conditioning') are used to kill residual leukemia cells and the patient's normal blood cells, especially immune cells that could reject the donor cells. Following the chemo/radiotherapy, blood stem cells from the donor are infused. These stem cells will grow and eventually replace the patient's original blood system, including red cells that carry oxygen to our tissues, platelets that stop bleeding from damaged vessels, and multiple types of immune-system white blood cells that fight infections. Mature donor immune cells, especially a type of immune cell called T lymphocytes (or T cells) are transferred along with these blood-forming stem cells. T cells are a major part of the curative power of transplantation because they can attack leukemia cells that have survived the chemo/radiation therapy and also help to fight infections after transplantation. However, donor T cells can also attack a patient's healthy tissues in an often-dangerous condition known as Graft-Versus-Host-Disease (GVHD). Drugs that suppress immune cells are used to decrease the severity of GVHD; however, they are incompletely effective and prolonged immunosuppression used to prevent and treat GVHD significantly increases the risk of serious infections. Removing all donor T cells from the transplant graft can prevent GVHD, but doing so also profoundly delays infection-fighting immune reconstitution and eliminates the possibility that donor immune cells will kill residual leukemia cells. Work in animal models found that depleting a type of T cell, called naïve T cells or T cells that have never responded to an infection, can diminish GVHD while at least in part preserving some of the benefits of donor T cells including resistance to infection and the ability to kill leukemia cells. This clinical trial studies how well the selective removal of naïve T cells works in preventing GVHD after peripheral blood stem cell transplants. This study will include patients conditioned with high or medium intensity chemo/radiotherapy who can receive donor grafts from related or unrelated donors.

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+Detailed description

OUTLINE: Patients are assigned to 1 of 4 treatment arms.

CONDITIONING:

ARMS A AND C (high-intensity myeloablative conditioning): Patients undergo total body irradiation twice daily (BID) on days -10 to -7. Patients also receive thiotepa intravenously (IV) over 4 hours on days -6 and -5 and fludarabine phosphate IV over 30 minutes on days -6 to -2.

ARMS B AND D (lower-intensity myeloablative conditioning): Patients receive cyclophosphamide IV over 1 hour on day -6, fludarabine phosphate IV over 30 minutes on days -6 to -2, and thiotepa IV over 4 hours on days -5 and -4. Patients also undergo total body irradiation once daily (QD) on days -2 and -1.

TRANSPLANT: In all arms, patients undergo allogeneic HSCT with granulocyte colony-stimulating factor (GCSF)-mobilized CD34-enriched PBSC and CD45RA-depleted cells on day 0.

GVHD PROPHYLAXIS:

ARMS A AND C: Beginning day -1, patients receive tacrolimus IV over 22-24 hours or orally (PO) (BID if given PO) for 50 days with taper in the absence of GVHD. Patients also receive methotrexate IV on days 1, 3, 6, and 11.

ARMS B AND D: Beginning day -1, patients receive tacrolimus IV over 22-24 hours or PO (BID if given PO) for 50 days and mycophenolate mofetil IV and PO every 8 hours on days -3 to approximately day 30, with or without taper at the discretion of the treating physician. Mycophenolate mofetil should be continued or resumed after day 30 if donor chimerism is low, after discussion with the principal investigator.

After completion of study treatment, patients are followed up at 80-100 days, 360 days, and then yearly for up to 5 years.

+Arms and interventions

ArmTypeInterventionsDescription
Arm A (MRD)ExperimentalProcedure: Allogeneic Hematopoietic Stem Cell Transplantation; Drug: Cyclophosphamide; Drug: Fludarabine Phosphate; Other: Laboratory Biomarker Analysis; Drug: Methotrexate; Procedure: Peripheral Blood Stem Cell Transplantation; Drug: Tacrolimus; Drug: Thiotepa; Radiation: Total-Body IrradiationHIGH-INTENSITY MYELOABLATIVE CONDITIONING: Patients undergo total body irradiation BID on days -10 to -7. Patients also receive thiotepa IV over 4 hours on days -6 and -5 and fludarabine phosphate IV over 30 minutes on days -6 to -2. TRANSPLANT: In all arms, patients undergo allogeneic HSCT with GCSF-mobilized CD34-enriched PBSC and CD45RA-depleted cells on day 0. GVHD PROPHYLAXIS: Beginning day -1, patients receive tacrolimus IV over 22-24 hours or PO (BID if given PO) for 50 days with taper in the absence of GVHD. Patients also receive methotrexate IV on days 1, 3, 6, and 11.
Arm B (MRD)ExperimentalProcedure: Allogeneic Hematopoietic Stem Cell Transplantation; Drug: Cyclophosphamide; Drug: Fludarabine Phosphate; Other: Laboratory Biomarker Analysis; Drug: Mycophenolate Mofetil; Procedure: Peripheral Blood Stem Cell Transplantation; Drug: Tacrolimus; Drug: Thiotepa; Radiation: Total-Body IrradiationLOWER-INTENSITY MYELOABLATIVE CONDITIONING: Patients receive cyclophosphamide IV over 1 hour on day -6, fludarabine phosphate IV over 30 minutes on days -6 to -2, and thiotepa IV over 4 hours on days -5 and -4. Patients also undergo total body irradiation QD on days -2 and -1. TRANSPLANT: In all arms, patients undergo allogeneic HSCT with GCSF-mobilized CD34-enriched PBSC and CD45RA-depleted cells on day 0. GVHD PROPHYLAXIS: Beginning day -1, patients receive tacrolimus IV over 22-24 hours or PO (BID if given PO) for 50 days and mycophenolate mofetil IV and PO every 8 hours on day -3 to approximately day 30, with or without taper at the discretion of the treating physician. Mycophenolate mofetil should be continued or resumed after day 30 if donor chimerism is low, after discussion with the Principal Investigator.
Arm C (MUD)ExperimentalProcedure: Allogeneic Hematopoietic Stem Cell Transplantation; Drug: Cyclophosphamide; Drug: Fludarabine Phosphate; Other: Laboratory Biomarker Analysis; Drug: Methotrexate; Procedure: Peripheral Blood Stem Cell Transplantation; Drug: Tacrolimus; Drug: Thiotepa; Radiation: Total-Body IrradiationHIGH-INTENSITY MYELOABLATIVE CONDITIONING: Patients undergo total body irradiation BID on days -10 to -7. Patients also receive thiotepa IV over 4 hours on days -6 and -5 and fludarabine phosphate IV over 30 minutes on days -6 to -2. TRANSPLANT: In all arms, patients undergo allogeneic HSCT with G-CSF-mobilized CD34-enriched PBSC and CD45RA-depleted cells on day 0. GVHD PROPHYLAXIS: Beginning day -1, patients receive tacrolimus IV over 22-24 hours or PO (BID if given PO) for 50 days with taper in the absence of GVHD. Patients also receive methotrexate IV on days 1, 3, 6, and 11.
Arm D (MUD)ExperimentalProcedure: Allogeneic Hematopoietic Stem Cell Transplantation; Drug: Cyclophosphamide; Drug: Fludarabine Phosphate; Other: Laboratory Biomarker Analysis; Drug: Mycophenolate Mofetil; Procedure: Peripheral Blood Stem Cell Transplantation; Drug: Tacrolimus; Drug: ThiotepaLOWER-INTENSITY MYELOABLATIVE CONDITIONING: Patients receive cyclophosphamide IV over 1 hour on day -6, fludarabine phosphate IV over 30 minutes on days -6 to -2, and thiotepa IV over 4 hours on days -5 and -4. Patients also undergo total body irradiation QD on days -2 and -1. TRANSPLANT: In all arms, patients undergo allogeneic HSCT with G-CSF-mobilized CD34-enriched PBSC and CD45RA-depleted cells on day 0. GVHD PROPHYLAXIS: Beginning day -1, patients receive tacrolimus IV over 22-24 hours or PO (BID if given PO) for 50 days and mycophenolate mofetil IV and PO every 8 hours on day -3 to approximately day 30, with or without taper at the discretion of the treating physician. Mycophenolate mofetil should be continued or resumed after day 30 if donor chimerism is low, after discussion with the Principal Investigator.
  • Allogeneic Hematopoietic Stem Cell Transplantation (Procedure), also known as Allogeneic Hematopoietic Cell Transplantation, Allogeneic Stem Cell Transplantation, HSC, HSCT: Undergo allogeneic HSCT
  • Cyclophosphamide (Drug), also known as (-)-Cyclophosphamide, 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate, Carloxan, Ciclofosfamida, Ciclofosfamide, Cicloxal, Clafen, Claphene, CP monohydrate, CTX, CYCLO-cell, Cycloblastin, Cycloblastine, Cyclophospham, Cyclophosphamid monohydrate, Cyclophosphamidum, Cyclophosphan, Cyclophosphane, Cyclophosphanum, Cyclostin, Cyclostine, Cytophosphan, Cytophosphane, Cytoxan, Fosfaseron, Genoxal, Genuxal, Ledoxina, Mitoxan, Neosar, Revimmune, Syklofosfamid, WR- 138719: Given IV
  • Fludarabine Phosphate (Drug), also known as 2-F-ara-AMP, 9H-Purin-6-amine, 2-fluoro-9-(5-O-phosphono-.beta.-D-arabinofuranosyl)-, Beneflur, Fludara, SH T 586: Given IV
  • Laboratory Biomarker Analysis (Other): Correlative studies
  • Methotrexate (Drug), also known as Abitrexate, Alpha-Methopterin, Amethopterin, Brimexate, CL 14377, CL-14377, Emtexate, Emthexat, Emthexate, Farmitrexat, Fauldexato, Folex, Folex PFS, 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: Given IV
  • Mycophenolate Mofetil (Drug), also known as Cellcept, MMF: Given IV and PO
  • Peripheral Blood Stem Cell Transplantation (Procedure), also known as PBPC transplantation, PBSCT, Peripheral Blood Progenitor Cell Transplantation, Peripheral Stem Cell Support, Peripheral Stem Cell Transplant, Peripheral Stem Cell Transplantation: Undergo PBSCT with GCSF-mobilized CD34-enriched PBSC
  • Peripheral Blood Stem Cell Transplantation (Procedure), also known as PBPC transplantation, PBSCT, Peripheral Blood Progenitor Cell Transplantation, Peripheral Stem Cell Support, Peripheral Stem Cell Transplant, Peripheral Stem Cell Transplantation: Undergo PBSCT with CD45RA-depleted cells
  • Tacrolimus (Drug), also known as FK 506, Fujimycin, Hecoria, Prograf, Protopic: Given IV or PO
  • Thiotepa (Drug), also known as 1,1',1''-Phosphinothioylidynetrisaziridine, Girostan, N,N', N''-Triethylenethiophosphoramide, Oncotiotepa, STEPA, Tepadina, TESPA, Tespamin, Tespamine, Thio-Tepa, Thiofosfamide, Thiofozil, Thiophosphamide, Thiophosphoramide, Thiotef, Tifosyl, TIO TEF, Tio-tef, Triethylene thiophosphoramide, Triethylenethiophosphoramide, Tris(1-aziridinyl)phosphine sulfide, TSPA, WR 45312: Given IV
  • Total-Body Irradiation (Radiation), also known as Total Body Irradiation, Whole-Body Irradiation, TBI, Whole Body Irradiation: Undergo TBI

+Outcome measures

Primary outcomes

  • Chronic GVHD [Up to 5 years post-transplant]: Occurrence of chronic graft-versus-host disease (GHVD), defined operationally as the occurrence of compatible symptoms meeting National Institutes of Health criteria and requiring systemic pharmacological immunosuppression.
  • Time to Completion of Prednisone [Up to 5 years post-transplant]: Measure the number of days to discontinuation of prednisone in recipients of CD45RA+ T cell-depleted PBSCT by arm. Possible outcomes range from no systemic immunosuppression (best outcome) to 5 years on immunosuppression (poor outcome)
  • Time to Completion of All Immunosuppression [Up to 5 years post-transplant]: Measure the number of days to discontinuation of all immunosuppression in recipients of CD45RA+ T cell-depleted PBSCT by arm. Possible outcomes range from no systemic immunosuppression (best outcome) to 5 years on immunosuppression (poor outcome)
  • Requirement of Immunosuppression at 2 Years After Transplant [At 2 years post transplant]: Number of patients requiring immunosuppression 2 years after transplant.
  • Acute GVHD [Through day 100 post-transplant]: Presence of acute graft-versus-host disease (GVHD) grades II-IV, defined operationally as the occurrence of compatible symptoms or signs in the skin, gastrointestinal tract, or liver, in patients who received Naive t cell depleted PBSCT. Staging and grading are found on page 8 of the JCO supplement (Bleakley et al., 2022, original references Glucksberg et all, 1974, Przepiorka et all, 1995 ) with higher grade indicating worse outcomes.
  • Graft Failure [Up to 5 years post-transplant]: Defined operationally as failure to reach an absolute neutrophil count (ANC) of > 500/ul for 3 consecutive days by day 28 or irreversible decrease in ANC to < 100 after an established donor graft.

Secondary outcomes

  • Transplant Related Mortality by Day 100 [Through day 100 post-transplant]: Defined as mortality in any patient for whom there has not been a diagnosis of relapse.
  • Relapse [Up to 5 years post-transplant]: Defined by the presence of malignant cells in marrow, peripheral blood, or extramedullary sites by histopathology.

Other outcomes

  • Other Immunosuppressive Agents [Up to 5 years]: Use of additional immune suppressive agents other than first line therapy (prednisone and tacrolimus/cyclosporine)
  • aGVHD Management - Secondary [Up to day 100]: Requirement for secondary systemic therapy for acute graft-versus-host disease (GVHD) management
  • Engraftment - ANC >500/uL [Through day 100 post-transplant]: Time to absolute neutrophil count (ANC) of > 500/uL on the first of three consecutive days
  • Engraftment - ANC <1,000/uL [through Day 100 post-transplant]: Time to absolute neutrophil count (ANC) of > 1,000/uL on the first of three consecutive test results
  • Platelet Engraftment [Through day 100 post-transplant]: Time to platelet count > 20,000/uL for 3 days without transfusion
  • Platelet Engraftment - 50,000/uL [Through day 100 post-transplant]: Time to platelet count > 50,000/uL for 3 days without transfusion
  • Chimerism Analysis [Up to 360 days]: Will be analyzed from peripheral blood or marrow.

+Eligibility

Sex: All, ages: any to 60 Years, accepts healthy volunteers

Inclusion Criteria:

* Patients who are considered appropriate candidates for allogeneic hematopoietic stem cell transplantation and have one of the following diagnoses:

  * Acute lymphocytic leukemia in first or subsequent remission
  * Acute myeloid leukemia in first or subsequent remission
  * Acute lymphocytic leukemia in relapse or primary refractory disease with a circulating blast count of no more than 10,000/mm\^3 (Arms A or C only)
  * Acute myeloid leukemia in relapse or primary refractory disease with a circulating blast count of no more than 10,000/mm\^3 (Arms A or C only)
  * Refractory anemia with excess blasts (RAEB-1 and RAEB-2) (if the patient has received previous induction chemotherapy within 60 days)
  * Chronic myelogenous leukemia with a history of accelerated phase or blast crisis (if the patient has received at least one course of induction chemotherapy)
  * Other acute leukemia or related neoplasm (including but not limited to 'biphenotypic', 'undifferentiated' or 'ambiguous lineage' acute leukemia, blastic plasmacytoid dendritic cell neoplasm or lymphoblastic lymphoma)
* Patients 0-49 years old will be enrolled in Arm A or C (high-intensity)
* Patients 50-60 years old will be enrolled in Arm B or D (lower intensity); patients eligible for Arms B or D also include those who have received previous allogeneic HCT, or who have co-morbid conditions rendering them unsuitable for high-dose conditioning, determined in consultation with the principal investigator
* Patient with a HLA-matched (HLA-A, B, C, and DR beta 1 \[DRB1\] molecularly matched) unrelated donor or related donor capable of donating PBSC
* DONOR INCLUSION:
* HLA-matched related donors >= 18 years and capable and willing to donate PBSC (Arms A and B)
* HLA-matched unrelated donors (HLA-A, B, C, and DRB1 matched based on high-resolution typing) capable and willing to donate PBSC (Arms C and D)

Exclusion Criteria:

* Patients with central nervous system (CNS) involvement refractory to intrathecal chemotherapy and/or standard cranial-spinal radiation
* Patients on other experimental protocols for prevention of acute GVHD
* Patient weight >= 100 kg; patients >= 70 kg with MUDs must be discussed with the principal investigator
* Patients who are human immunodeficiency virus positive (HIV+)
* Patients with uncontrolled infections for whom myeloablative HCT is considered contraindicated by the consulting infectious disease physician (upper respiratory tract viral infection does not constitute an uncontrolled infection in this context)
* Patients with organ dysfunction
* ARM A OR C EXCLUSION:
* Creatinine > 1.5 mg/dl at the present time; patients with a known history of creatinine > 1.5 mg/dl must have a current estimated creatinine clearance of > 40 ml/min
* Cardiac ejection fraction < 45%
* Diffusing capacity of the lung for carbon monoxide (DLCO) corrected < 60%; patients who are unable to perform pulmonary function tests (for example, due to young age and/or developmental status) will be excluded if the oxygen (O2) saturation is < 92% on room air
* Liver function abnormality; patients who have liver function tests (LFTs) (including total bilirubin, aspartate aminotransferase \[AST\] and alanine aminotransferase \[ALT\]) >= twice the upper limit of normal should be evaluated by a gastrointestinal (GI) physician; unless there is a clear precipitating factor (such as an azole, methotrexate, Bactrim or another drug); if the GI physician considers that HCT on the high-intensity arms of protocol is contraindicated for that patient the patient may be considered for treatment on the lower intensity arm of the protocol or excluded from the protocol; patients with Gilbert's syndrome and no other known liver function abnormality and patients with reversible drug-related transaminitis do not necessarily require GI consultation and may be included on the high-intensity arms of the protocol
* ARM B OR D EXCLUSION:
* Creatinine > 2.0 mg/dl at the present time; patients with a known history of creatinine > 1.5 mg/dl must have a current estimated creatinine clearance > 40 ml/min
* Cardiac ejection fraction < 35%
* DLCO corrected < 50%; patients who are unable to perform pulmonary function tests (for example, due to young age and/or developmental status) will be excluded if the O2 saturation is < 92% on room air; patients with a DLCO 50-60% must also have a partial pressure of oxygen (pO2) of > 80 mmHg
* Liver function abnormality; patients who have LFTs >= twice the upper limit of normal should be evaluated by a GI physician unless there is a clear precipitating factor (such as an azole, methotrexate, Bactrim or another drug); patients with fulminant liver failure, cirrhosis with evidence of portal hypertension or bridging fibrosis, alcoholic hepatitis, esophageal varices, a history of bleeding esophageal varices, hepatic encephalopathy, or correctable hepatic synthetic dysfunction evidenced by prolongation of the prothrombin time, ascites related to portal hypertension, bacterial or fungal abscess, biliary obstruction, chronic viral hepatitis with total serum bilirubin > 3 mg/dL, and symptomatic biliary disease will be excluded
* Patients will be excluded from Arms A and C if they have received a previous myeloablative transplant; patients who have received a prior HCT at least 6 months prior may be considered for inclusion on Arms B or D after discussion with the principal investigator (PI)
* Patients with a life expectancy < 3 months from co-existing disease other than the leukemia or RAEB
* Patients who are pregnant or breast-feeding
* Fertile patients of child bearing age unwilling to use contraception during and for 12 months post-transplant
* Patients with a significant other medical conditions that would make them unsuitable for transplant
* Patients with a known hypersensitivity to tacrolimus, methotrexate (Arm A or C) or MMF (Arm B or D)
* DONOR EXCLUSION:
* Donors who are HIV-1, HIV-2, human T-lymphotropic virus (HTLV)-1, HTLV-2 seropositive or with active hepatitis B or hepatitis C virus infection
* Donors who fail eligibility requirements for donation of cells or tissue for donation of a Human Cell and Tissue Products (HCT/P) will be excluded unless use of the cells complies urgent medical need or allogeneic use in a first-degree or second-degree relative
* Unrelated donors donating outside of the United States of America (USA)

+Posted results

Participant flow

MilestoneArm A (MRD / High Intensity Conditioning)Arm B (MRD / Low Intensity Conditioning)Arm C (MUD / High Intensity Conditioning)Arm D (MUD / Low Intensity Conditioning)
Started21201818
Alive at day 28 post transplant20201818
Alive at day 100 post transplant20201718
Alive at 1 year post transplant19171515
Alive at 2 years post transplant18161514
Alive at 3 years post transplant17161514
Completed16161414
Not completed5444

Outcome results

  • Chronic GVHD (Primary), Count of participants, Participants: Arm A (MRD / High Intensity Conditioning) 17; Arm B (MRD / Low Intensity Conditioning) 20; Arm C (MUD / High Intensity Conditioning) 14; Arm D (MUD / Low Intensity Conditioning) 17
  • Other Immunosuppressive Agents (Other pre specified)
  • Time to Completion of Prednisone (Primary), Median, Days post transplant: Arm A (MRD / High Intensity Conditioning) 65 +/- 84; Arm B (MRD / Low Intensity Conditioning) 68 +/- 98; Arm C (MUD / High Intensity Conditioning) 87 +/- 110; Arm D (MUD / Low Intensity Conditioning) 79 +/- 332
  • Time to Completion of All Immunosuppression (Primary), Median, Days: Arm A (MRD / High Intensity Conditioning) 252 +/- 99; Arm B (MRD / Low Intensity Conditioning) 216 +/- 165; Arm C (MUD / High Intensity Conditioning) 244 +/- 145; Arm D (MUD / Low Intensity Conditioning) 223 +/- 317
  • Requirement of Immunosuppression at 2 Years After Transplant (Primary), Count of participants, Participants: Arm A (MRD / High Intensity Conditioning) 0; Arm B (MRD / Low Intensity Conditioning) 1; Arm C (MUD / High Intensity Conditioning) 0; Arm D (MUD / Low Intensity Conditioning) 1
  • Acute GVHD (Primary), Count of participants, Participants: Arm A (MRD / High Intensity Conditioning) 5; Arm B (MRD / Low Intensity Conditioning) 5; Arm C (MUD / High Intensity Conditioning) 4; Arm D (MUD / Low Intensity Conditioning) 3
  • aGVHD Management - Secondary (Other pre specified)
  • Graft Failure (Primary), Count of participants, Participants: Arm A (MRD / High Intensity Conditioning) 0; Arm B (MRD / Low Intensity Conditioning) 0; Arm C (MUD / High Intensity Conditioning) 0; Arm D (MUD / Low Intensity Conditioning) 0
  • Transplant Related Mortality by Day 100 (Secondary), Count of participants, Participants: Arm A (MRD / High Intensity Conditioning) 1; Arm B (MRD / Low Intensity Conditioning) 0; Arm C (MUD / High Intensity Conditioning) 1; Arm D (MUD / Low Intensity Conditioning) 0
  • Relapse (Secondary), Count of participants, Participants: Arm A (MRD / High Intensity Conditioning) 3; Arm B (MRD / Low Intensity Conditioning) 9; Arm C (MUD / High Intensity Conditioning) 4; Arm D (MUD / Low Intensity Conditioning) 4
  • Engraftment - ANC >500/uL (Other pre specified), Median, Days: Arm A (MRD / High Intensity Conditioning) 17.5 +/- 2.8; Arm B (MRD / Low Intensity Conditioning) 14.5 +/- 2.1; Arm C (MUD / High Intensity Conditioning) 15.5 +/- 2.6; Arm D (MUD / Low Intensity Conditioning) 15.5 +/- 2.4
  • Engraftment - ANC <1,000/uL (Other pre specified), Median, Days: Arm A (MRD / High Intensity Conditioning) 19 +/- 5.5; Arm B (MRD / Low Intensity Conditioning) 15.5 +/- 2.6; Arm C (MUD / High Intensity Conditioning) 18 +/- 3.2; Arm D (MUD / Low Intensity Conditioning) 16.5 +/- 4.3
  • Platelet Engraftment (Other pre specified), Median, Days post transplant: Arm A (MRD / High Intensity Conditioning) 15.5 +/- 4; Arm B (MRD / Low Intensity Conditioning) 13.5 +/- 1.8; Arm C (MUD / High Intensity Conditioning) 15.35 +/- 3.25; Arm D (MUD / Low Intensity Conditioning) 13 +/- 3.8
  • Platelet Engraftment - 50,000/uL (Other pre specified), Median, Days post transplant: Arm A (MRD / High Intensity Conditioning) 22 +/- 4.1; Arm B (MRD / Low Intensity Conditioning) 17 +/- 2; Arm C (MUD / High Intensity Conditioning) 20 +/- 3.7; Arm D (MUD / Low Intensity Conditioning) 16 +/- 4.4
  • Chimerism Analysis (Other pre specified)

Adverse events

Time frame: Serious and other adverse events were reported from pre-transplant conditioning through day 100 post-transplant. All-cause mortality (including both relapse and non-relapse mortality) was assessed for up to 5 years post-transplant.

ArmDeathsSerious adverse eventsOther adverse events
Arm A (MRD / High Intensity Conditioning)5/21 (23.8%)21/21 (100.0%)6/21 (28.6%)
Arm B (MRD / Low Intensity Conditioning)4/20 (20.0%)17/20 (85.0%)8/20 (40.0%)
Arm C (MUD / High Intensity Conditioning)4/18 (22.2%)18/18 (100.0%)6/18 (33.3%)
Arm D (MUD / Low Intensity Conditioning)4/18 (22.2%)15/18 (83.3%)8/18 (44.4%)

Serious adverse events by term

TermOrgan systemArm A (MRD / High Intensity Conditioning)Arm B (MRD / Low Intensity Conditioning)Arm C (MUD / High Intensity Conditioning)Arm D (MUD / Low Intensity Conditioning)
Heart FailureCardiac disorders1/210/200/180/18
Abdominal painGastrointestinal disorders0/210/201/181/18
DiarrheaGastrointestinal disorders0/212/203/181/18
EsophagitisGastrointestinal disorders0/210/201/180/18
Gastrointestinal PainGastrointestinal disorders0/210/201/180/18
GastroparesisGastrointestinal disorders0/210/200/181/18
Mucositis oralGastrointestinal disorders17/214/2018/188/18
NauseaGastrointestinal disorders3/215/202/184/18
TyphlitisGastrointestinal disorders1/210/200/180/18
VomitingGastrointestinal disorders0/210/201/180/18
FeverGeneral disorders1/210/202/180/18
PainGeneral disorders0/211/202/180/18
Hepatic FailureHepatobiliary disorders0/210/201/180/18
Anorectal infectionInfections and infestations1/210/200/180/18
Catheter related infectionInfections and infestations1/211/202/182/18
EnterocolitisInfections and infestations1/210/200/181/18
Infections and infestations - OtherInfections and infestations18/2112/2010/189/18
Lung InfectionInfections and infestations1/210/201/181/18
Otitis MediaInfections and infestations0/211/200/180/18
SepsisInfections and infestations0/212/201/181/18
SinusitisInfections and infestations1/210/200/180/18
Skin infectionInfections and infestations1/211/200/180/18
Soft Tissue InfectionInfections and infestations0/211/200/180/18
FallInjury, poisoning and procedural complications0/211/200/180/18
Vascular access complicationInjury, poisoning and procedural complications0/211/200/181/18
Weight loss investigationsInvestigations0/211/200/180/18
AnorexiaMetabolism and nutrition disorders1/213/200/181/18
DehydrationMetabolism and nutrition disorders0/210/201/180/18
HyperglycemiaMetabolism and nutrition disorders5/212/201/182/18
HypocalcemiaMetabolism and nutrition disorders1/210/200/180/18
HypokalemiaMetabolism and nutrition disorders2/212/202/180/18
HyponatremiaMetabolism and nutrition disorders2/212/201/181/18
HypophosphatemiaMetabolism and nutrition disorders2/212/200/180/18
Bone painMusculoskeletal and connective tissue disorders0/211/200/180/18
MyalgiaMusculoskeletal and connective tissue disorders0/211/200/180/18
ArachnoiditisNervous system disorders0/210/201/180/18
EncephalopathyNervous system disorders1/210/201/180/18
HeadacheNervous system disorders1/211/200/180/18
Intracranial hemorrhageNervous system disorders0/210/200/181/18
ManiaPsychiatric disorders0/211/200/180/18
Acute kidney injuryRenal and urinary disorders1/210/201/180/18
AspirationRespiratory, thoracic and mediastinal disorders1/210/200/180/18
HypoxiaRespiratory, thoracic and mediastinal disorders0/212/200/180/18
Pulmonary edemaRespiratory, thoracic and mediastinal disorders0/211/200/180/18
Respiratory failureRespiratory, thoracic and mediastinal disorders0/210/201/180/18
Rash, maculo-papularSkin and subcutaneous tissue disorders0/210/203/180/18
Capillary leak syndromeVascular disorders0/210/201/180/18
HypertensionVascular disorders0/211/200/180/18
HypotensionVascular disorders0/210/200/182/18

Other adverse events by term

TermOrgan systemArm A (MRD / High Intensity Conditioning)Arm B (MRD / Low Intensity Conditioning)Arm C (MUD / High Intensity Conditioning)Arm D (MUD / Low Intensity Conditioning)
DiarrheaGastrointestinal disorders0/213/200/182/18
Cytokine release syndromeImmune system disorders0/210/200/181/18
Infections and infestations, otherInfections and infestations0/210/201/182/18
HyperglycemiaMetabolism and nutrition disorders2/212/201/180/18
HypermagnesemiaMetabolism and nutrition disorders1/210/200/181/18
HypokalemiaMetabolism and nutrition disorders0/210/200/182/18
HyponatremiaMetabolism and nutrition disorders2/211/200/181/18
HypophosphatemiaMetabolism and nutrition disorders1/212/201/181/18
SyncopeNervous system disorders0/212/202/181/18
Rash maculo-papularSkin and subcutaneous tissue disorders0/210/203/181/18
HypertensionVascular disorders2/210/202/183/18

+Locations (2)

FacilityCityCountryStatus
University of Pittsburgh Cancer Institute (UPCI)Pittsburgh, PennsylvaniaUnited States
Fred Hutch/University of Washington Cancer ConsortiumSeattle, WashingtonUnited States

+Publications

  • Results publication: Bleakley M, Sehgal A, Seropian S, Biernacki MA, Krakow EF, Dahlberg A, Persinger H, Hilzinger B, Martin PJ, Carpenter PA, Flowers ME, Voutsinas J, Gooley TA, Loeb K, Wood BL, Heimfeld S, Riddell SR, Shlomchik WD. Naive T-Cell Depletion to Prevent Chronic Graft-Versus-Host Disease. J Clin Oncol. 2022 Apr 10;40(11):1174-1185. doi: 10.1200/JCO.21.01755. Epub 2022 Jan 10. PMID 35007144

+Study documents

+Investigators

  • Marie Bleakley, Principal investigator, Fred Hutch/University of Washington Cancer Consortium

+Funding

NIH grants: R01HL121568, P01CA018029