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Alemtuzumab, Fludarabine Phosphate, and Low-Dose Total Body Irradiation Before Donor Stem Cell Transplantation in Treating Patients With Hematological Malignancies

Campath® [Alemtuzumab] Dose Escalation, Low-Dose TBI and Fludarabine Followed by HLA Class I Mismatched Donor Stem Cell Transplantation for Patients With Hematologic Malignancies - A Multi-Center Trial

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00040846
Enrollment
60
Registered
2003-01-27
Start date
2001-11-30
Completion date
2009-12-31
Last updated
2020-01-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Adult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities, Adult Acute Myeloid Leukemia With Del(5q), Adult Acute Myeloid Leukemia With Inv(16)(p13;q22), Adult Acute Myeloid Leukemia With t(15;17)(q22;q12), Adult Acute Myeloid Leukemia With t(16;16)(p13;q22), Adult Acute Myeloid Leukemia With t(8;21)(q22;q22), Adult Nasal Type Extranodal NK/T-cell Lymphoma, Anaplastic Large Cell Lymphoma, Angioimmunoblastic T-cell Lymphoma, Childhood Burkitt Lymphoma, Childhood Chronic Myelogenous Leukemia, Childhood Diffuse Large Cell Lymphoma, Childhood Immunoblastic Large Cell Lymphoma, Childhood Nasal Type Extranodal NK/T-cell Lymphoma, Chronic Phase Chronic Myelogenous Leukemia, Contiguous Stage II Adult Diffuse Small Cleaved Cell Lymphoma, Contiguous Stage II Grade 1 Follicular Lymphoma, Contiguous Stage II Grade 2 Follicular Lymphoma, Contiguous Stage II Marginal Zone Lymphoma, Contiguous Stage II Small Lymphocytic Lymphoma, Extranodal Marginal Zone B-cell Lymphoma of Mucosa-associated Lymphoid Tissue, Hepatosplenic T-cell Lymphoma, Myelodysplastic/Myeloproliferative Neoplasm, Unclassifiable, Nodal Marginal Zone B-cell Lymphoma, Noncontiguous Stage II Adult Diffuse Small Cleaved Cell Lymphoma, Noncontiguous Stage II Grade 1 Follicular Lymphoma, Noncontiguous Stage II Grade 2 Follicular Lymphoma, Noncontiguous Stage II Marginal Zone Lymphoma, Noncontiguous Stage II Small Lymphocytic Lymphoma, Peripheral T-cell Lymphoma, Previously Treated Myelodysplastic Syndromes, Progressive Hairy Cell Leukemia, Initial Treatment, Recurrent Adult Acute Myeloid Leukemia, Recurrent Adult Burkitt Lymphoma, Recurrent Adult Diffuse Large Cell Lymphoma, Recurrent Adult Diffuse Mixed Cell Lymphoma, Recurrent Adult Diffuse Small Cleaved Cell Lymphoma, Recurrent Adult Grade III Lymphomatoid Granulomatosis, Recurrent Adult Hodgkin Lymphoma, Recurrent Adult Immunoblastic Large Cell Lymphoma, Recurrent Adult Lymphoblastic Lymphoma, Recurrent Adult T-cell Leukemia/Lymphoma, Recurrent Childhood Acute Lymphoblastic Leukemia, Recurrent Childhood Acute Myeloid Leukemia, Recurrent Childhood Anaplastic Large Cell Lymphoma, Recurrent Childhood Large Cell Lymphoma, Recurrent Childhood Lymphoblastic Lymphoma, Recurrent Childhood Small Noncleaved Cell Lymphoma, Recurrent Cutaneous T-cell Non-Hodgkin Lymphoma, Recurrent Grade 1 Follicular Lymphoma, Recurrent Grade 2 Follicular Lymphoma, Recurrent Grade 3 Follicular Lymphoma, Recurrent Mantle Cell Lymphoma, Recurrent Marginal Zone Lymphoma, Recurrent Mycosis Fungoides/Sezary Syndrome, Recurrent/Refractory Childhood Hodgkin Lymphoma, Recurrent Small Lymphocytic Lymphoma, Refractory Chronic Lymphocytic Leukemia, Refractory Hairy Cell Leukemia, Refractory Multiple Myeloma, Relapsing Chronic Myelogenous Leukemia, Splenic Marginal Zone Lymphoma, Stage I Adult Diffuse Small Cleaved Cell Lymphoma, Stage I Childhood Anaplastic Large Cell Lymphoma, Stage I Childhood Large Cell Lymphoma, Stage I Cutaneous T-cell Non-Hodgkin Lymphoma, Stage I Grade 1 Follicular Lymphoma, Stage I Grade 2 Follicular Lymphoma, Stage II Childhood Anaplastic Large Cell Lymphoma, Stage II Childhood Large Cell Lymphoma, Stage II Cutaneous T-cell Non-Hodgkin Lymphoma, Stage III Adult Diffuse Large Cell Lymphoma, Stage III Adult Diffuse Small Cleaved Cell Lymphoma, Stage III Childhood Anaplastic Large Cell Lymphoma, Stage III Childhood Large Cell Lymphoma, Stage III Cutaneous T-cell Non-Hodgkin Lymphoma, Stage III Grade 1 Follicular Lymphoma, Stage III Grade 2 Follicular Lymphoma, Stage III Mantle Cell Lymphoma, Stage III Marginal Zone Lymphoma, Stage III Mycosis Fungoides/Sezary Syndrome, Stage III Small Lymphocytic Lymphoma, Stage II Mycosis Fungoides/Sezary Syndrome, Stage I Mantle Cell Lymphoma, Stage I Marginal Zone Lymphoma, Stage I Mycosis Fungoides/Sezary Syndrome, Stage I Small Lymphocytic Lymphoma, Stage IV Adult Diffuse Large Cell Lymphoma, Stage IV Adult Diffuse Small Cleaved Cell Lymphoma, Stage IV Childhood Anaplastic Large Cell Lymphoma, Stage IV Childhood Large Cell Lymphoma, Stage IV Cutaneous T-cell Non-Hodgkin Lymphoma, Stage IV Grade 1 Follicular Lymphoma, Stage IV Grade 2 Follicular Lymphoma, Stage IV Mantle Cell Lymphoma, Stage IV Marginal Zone Lymphoma, Stage IV Mycosis Fungoides/Sezary Syndrome, Stage IV Small Lymphocytic Lymphoma, T-cell Large Granular Lymphocyte Leukemia, Waldenström Macroglobulinemia

Brief summary

This phase II trial studies the side effects and the best dose of alemtuzumab when given together with fludarabine phosphate and low-dose total body irradiation (TBI) and how well it works before donor stem cell transplant in treating patients with hematological malignancies. Giving chemotherapy and low-dose TBI before a donor peripheral blood stem cell transplant helps stop the growth of cancer cells. It may also stop the patient's immune system from rejecting the donor's stem cells. Also, monoclonal antibodies, such as alemtuzumab, can find cancer cells and either kill them or deliver cancer-killing substances to them without harming normal cells. When the healthy stem cells from a donor are infused into the patient they may help the patient's bone marrow make stem cells, red blood cells, white blood cells, and platelets. Sometimes the transplanted cells from a donor can also make an immune response against the body's normal cells. Giving cyclosporine (CSP) and mycophenolate mofetil (MMF) after transplant may stop this from happening.

Detailed description

PRIMARY OBJECTIVES: I. To determine whether stable allogeneic engraftment from related and unrelated human leukocyte antigen (HLA)-mismatched stem cell donors can be safely established using a non-myeloablative conditioning regimen plus escalating doses of the anti-CD52 monoclonal antibody (mAb) Campath (alemtuzumab) in patients with hematologic malignancies. SECONDARY OBJECTIVES: I. Evaluate the risk of occurrence of acute and chronic graft-vs-host disease (GVHD). II. Evaluate the risk/incidence of infections. III. Determine whether engraftment can be maintained with a single dose fludarabine, donor lymphocyte infusion (DLI) and continued MMF/CSP. IV. Evaluate the risk for disease progression and relapse. OUTLINE: This is a dose-escalation study of alemtuzumab. CONDITIONING REGIMEN: Patients receive alemtuzumab intravenously (IV) over 2 hours on days -8 to -5 and fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HEMATOPOIETIC STEM CELL TRANSPLANTATION (HSCT): Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or orally (PO) twice daily (BID) on days -3 to 180 with taper to day 365 and MMF PO thrice daily (TID) on days 0-100 with taper to day 156. After completion of study treatment, patients are followed up periodically.

Interventions

BIOLOGICALalemtuzumab

Given IV

DRUGfludarabine phosphate

Given IV

RADIATIONtotal-body irradiation

Undergo TBI

PROCEDUREallogeneic hematopoietic stem cell transplantation

Undergo allogeneic HSCT

PROCEDUREperipheral blood stem cell transplantation

Undergo allogeneic peripheral blood stem cell transplantation

DRUGmycophenolate mofetil

Given PO

DRUGcyclosporine

Given IV or PO

Sponsors

National Heart, Lung, and Blood Institute (NHLBI)
CollaboratorNIH
National Cancer Institute (NCI)
CollaboratorNIH
Fred Hutchinson Cancer Center
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
No minimum to 74 Years
Healthy volunteers
No

Inclusion criteria

* Patients must be not eligible for conventional transplants and must have disease expected to be stable for at least 100 days without chemotherapy; patients with hematologic malignancies treatable with hematopoietic stem cell transplant (HSCT) or with a B cell malignancy except those treatable with autologous transplant will be included * Aggressive non-Hodgkin lymphomas (NHLs) and Other Histologies Such as Diffuse large B cell NHL * Patients with primary refractory or relapsed disease not eligible for an autologous transplant * Patients are eligible following an autologous transplant in remission or in relapse * Planned tandem transplant is allowed for patients at high risk of relapse * Low grade NHL with \< 6 months duration of complete remission (CR) between courses of conventional therapy * Mantle Cell NHL may be treated in first CR * Chronic lymphocytic leukemia (CLL) - Must have failed 2 lines of conventional therapy and be refractory to fludarabine * Hodgkin disease (HD) - Must have received and failed frontline therapy; patients must have had a prior autologous transplant or were not eligible for autologous transplant; planned tandem transplants are allowed for patients at high risk of relapse * Multiple myeloma (MM) - Must have received prior chemotherapy and a prior autologous transplant, unless autologous transplant was not possible; planned tandem transplants are allowed for patients at high risk of relapse * Acute myeloid leukemia (AML) - Must have \< 5% marrow blasts at the time of transplant * Acute lymphocytic leukemia (ALL) - Must have \< 5% blasts at the time of transplant * Chronic myeloid leukemia (CML) - Patients will be accepted beyond chronic phase 1 (CP1) if they have received previous myelosuppressive chemotherapy or HSCT, and have \< 5% marrow blasts at time of transplant * Myelodysplastic (MDS)/Myeloproliferative disorders - Must have failed previous myelosuppressive chemotherapy or HSCT, and have \< 5% marrow blasts at time of transplant * Waldenstrom's Macroglobulinemia - Must have failed 2 courses of therapy * Patients \< 12 years old must be approved by the Fred Hutchinson Cancer Research Center (FHCRC) principal investigator (PI) * Patients who refuse to be treated on a conventional transplant protocol; for this inclusion, criteria transplants must be approved by both the participating institution´s patient review committee such as the Patient Care Conference (PCC) at the FHCRC and the FHCRC principal investigator * Patients with related or unrelated donors for whom * The best available match is a HLA class II DRB1 and DQB1 matched donor incompatible for any single serologically detectable class I HLA-A, -B, -C mismatch; one additional allele level class I mismatch is allowed OR any combination of 2 allele level mismatches (if typed at the molecular level) * There is a likelihood of rapid disease progression while HLA typing and results of a preliminary search and the donor pool suggests that a 10/10 HLA-A, B, C, DRB1 and DQB1 matched unrelated donor will not be found * There is no HLA-A, -B or -C one locus allelic mismatched related donor available * There is no indication for an autologous transplantation as a treatment option * DONOR: Related or unrelated donors who are matched for HLA-DRB1 and DQB1 alleles (must be defined by high resolution typing), and who are mismatched for: * Any single serologically detectable HLA-A or B or C antigen +/- 1 allele or * Any combination of two HLA-A, -B, or -C alleles (if prospectively typed at molecular level)

Exclusion criteria

* Patients who are homozygous at the mismatched major histocompatibility complex (MHC) class I locus * A positive cross-match exists between the donor and recipient * Patients with rapidly progressive intermediate or high grade NHL * Presence of circulating leukemic blasts (in the peripheral blood) detected by standard pathology for patients with AML, ALL or CML * Life expectancy severely limited by diseases other than malignancy * Central nervous system (CNS) involvement with disease refractory to intrathecal chemotherapy * Fertile men or women unwilling to use contraceptives during and for up to 12 months post treatment * Female patients who are pregnant or breast-feeding * Human immunodeficiency virus (HIV) positive patients * Patients with active non-hematologic malignancies (except non-melanoma skin cancers) * Patients with a history of non-hematologic malignancies (except non-melanoma skin cancers) currently in a complete remission, who are less than 5 years from the time of complete remission, and have a \> 20% risk of disease recurrence * Fungal infections with radiological progression after receipt of amphotericin B or active triazole for greater than 1 month * Patients with active bacterial or fungal infections unresponsive to medical therapy * Patients with the following organ dysfunction symptomatic coronary artery disease or ejection fraction \< 35% or other cardiac failure requiring therapy; ejection fraction is required if the patient is \> 50 years of age, or history of cardiac disease or anthracycline exposure * Diffusion capacity of carbon monoxide (DLCO) \< 35%; total lung capacity (TLC) \< 35%; or forced expiratory volume in one second (FEV1) \< 35% and/or receiving supplementary continuous oxygen * Patients with clinical or laboratory evidence of liver disease would be evaluated for the cause of liver disease, its clinical severity in terms of liver function, bridging fibrosis, and the degree of portal hypertension; patients will be excluded if they are found to have fulminant liver failure; cirrhosis of the liver with evidence of portal hypertension; alcoholic hepatitis; esophageal varices; a history of bleeding esophageal varices; hepatic encephalopathy; uncorrectable hepatic synthetic dysfunction evinced by prolongation of the prothrombin time; ascites related to portal hypertension; bacterial or fungal liver abscess; biliary obstruction; chronic viral hepatitis with total serum bilirubin \>3 mg/dL; or symptomatic biliary disease * Patients with poorly controlled hypertension on multiple antihypertensives * Karnofsky score \< 70 for adult patients * Lansky-Play Performance Score \< 50 for pediatric patients * DONOR: Bone marrow (BM) donors * DONOR: Donors who are HIV-positive and/or, medical conditions that would result in increased risk for granulocyte colony-stimulating factor (G-CSF) mobilization and harvest of peripheral blood stem cell (PBSC) * DONOR: Donors \< 12 years of age

Design outcomes

Primary

MeasureTime frameDescription
Evaluate the Risk of Transplant Related Mortality.100 days after transplantPercentage patients with Day 100 transplant related mortality.
Evaluate the Risk of Occurrence of Acute and Chronic GVHD1 year after transplantPercentage patients who developed acute/chronic GVHD. aGVHD Stages Skin: 1. a maculopapular eruption involving \< 25% BSA 2. a maculopapular eruption involving 25 - 50% BSA 3. generalized erythroderma 4. generalized erythroderma with bullous formation and often with desquamation Liver: 1. bilirubin 2.0 - 3.0 mg/100 mL 2. bilirubin 3 - 5.9 mg/100 mL 3. bilirubin 6 - 14.9 mg/100 mL 4. bilirubin \> 15 mg/100 mL Gut: Diarrhea is graded 1 - 4 in severity. Nausea and vomiting and/or anorexia caused by GVHD is assigned as 1 in severity. The severity of gut involvement is assigned to the most severe involvement noted. Patients with visible bloody diarrhea are at least stage 2 gut and grade 3 overall. aGVHD Grades Grade III: Stage 2 - 4 gastrointestinal involvement and/or +2 to +4 liver involvement, with or without a rash Grade IV: Pattern and severity of GVHD similar to grade 3 with extreme constitutional symptoms or death
Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.100 days after transplantMixed chimerism will be defined as the detection of donor T cells (CD3+) and granulocytes (CD 33+), as a proportion of the total T cell and granulocyte population, respectively, of greater than 5% and less than 95% in the peripheral blood. Full donor chimerism is defined as \> 95% donor CD3+ T cells.

Secondary

MeasureTime frameDescription
Evaluate the Risk/Incidence of Infections100 days after transplantPercentage patients who experienced infections within 100 days post-transplant.
Evaluate the Risk for Disease Progression and Relapse1 year after transplantPercentage patients who relapsed/progressed within 1 year post-transplant.

Countries

Italy, United States

Participant flow

Participants by arm

ArmCount
Dose Level 1 (No Campath)
CONDITIONING REGIMEN: Patients receive fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HSCT: Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or PO BID on days -3 to 180 with taper to day 365 and MMF PO TID on days 0-100, with taper to day 156. fludarabine phosphate: Given IV total-body irradiation: Undergo TBI allogeneic hematopoietic stem cell transplantation: Undergo allogeneic HSCT peripheral blood stem cell transplantation: Undergo allogeneic peripheral blood stem cell transplantation mycophenolate mofetil: Given PO cyclosporine: Given IV or PO
60
Dose Level 2 (0.025 mg/kg/Day Campath)
CONDITIONING REGIMEN: Patients receive Alemtuzumab (Campath) on days -8 to -5 as well as fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HSCT: Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or PO BID on days -3 to 180 with taper to day 365 and MMF PO TID on days 0-100, with taper to day 156. fludarabine phosphate: Given IV total-body irradiation: Undergo TBI allogeneic hematopoietic stem cell transplantation: Undergo allogeneic HSCT peripheral blood stem cell transplantation: Undergo allogeneic peripheral blood stem cell transplantation mycophenolate mofetil: Given PO cyclosporine: Given IV or PO alemtuzumab: Given IV
0
Dose Level 3 (0.050 mg/kg/Day Campath)
CONDITIONING REGIMEN: Patients receive Alemtuzumab (Campath) on days -8 to -5 as well as fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HSCT: Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or PO BID on days -3 to 180 with taper to day 365 and MMF PO TID on days 0-100, with taper to day 156. fludarabine phosphate: Given IV total-body irradiation: Undergo TBI allogeneic hematopoietic stem cell transplantation: Undergo allogeneic HSCT peripheral blood stem cell transplantation: Undergo allogeneic peripheral blood stem cell transplantation mycophenolate mofetil: Given PO cyclosporine: Given IV or PO alemtuzumab: Given IV
0
Dose Level 4 (0.10 mg/kg/Day Campath)
CONDITIONING REGIMEN: Patients receive Alemtuzumab (Campath) on days -8 to -5 as well as fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HSCT: Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or PO BID on days -3 to 180 with taper to day 365 and MMF PO TID on days 0-100, with taper to day 156. fludarabine phosphate: Given IV total-body irradiation: Undergo TBI allogeneic hematopoietic stem cell transplantation: Undergo allogeneic HSCT peripheral blood stem cell transplantation: Undergo allogeneic peripheral blood stem cell transplantation mycophenolate mofetil: Given PO cyclosporine: Given IV or PO alemtuzumab: Given IV
0
Dose Level 5 (0.20 mg/kg/Day Campath)
CONDITIONING REGIMEN: Patients receive Alemtuzumab (Campath) on days -8 to -5 as well as fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HSCT: Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or PO BID on days -3 to 180 with taper to day 365 and MMF PO TID on days 0-100, with taper to day 156. fludarabine phosphate: Given IV total-body irradiation: Undergo TBI allogeneic hematopoietic stem cell transplantation: Undergo allogeneic HSCT peripheral blood stem cell transplantation: Undergo allogeneic peripheral blood stem cell transplantation mycophenolate mofetil: Given PO cyclosporine: Given IV or PO alemtuzumab: Given IV
0
Dose Level 6 (0.40 mg/kg/Day Campath)
CONDITIONING REGIMEN: Patients receive Alemtuzumab (Campath) on days -8 to -5 as well as fludarabine phosphate IV on days -4 to -2. Patients also undergo low-dose TBI on day 0. HSCT: Patients undergo allogeneic peripheral blood stem cell transplantation on day 0. IMMUNOSUPPRESSION: Patients receive CSP IV or PO BID on days -3 to 180 with taper to day 365 and MMF PO TID on days 0-100, with taper to day 156. fludarabine phosphate: Given IV total-body irradiation: Undergo TBI allogeneic hematopoietic stem cell transplantation: Undergo allogeneic HSCT peripheral blood stem cell transplantation: Undergo allogeneic peripheral blood stem cell transplantation mycophenolate mofetil: Given PO cyclosporine: Given IV or PO alemtuzumab: Given IV
0
Total60

Baseline characteristics

CharacteristicTotalDose Level 1 (No Campath)
Age, Categorical
<=18 years
1 Participants1 Participants
Age, Categorical
>=65 years
7 Participants7 Participants
Age, Categorical
Between 18 and 65 years
52 Participants52 Participants
Age, Continuous56.7 years56.7 years
Region of Enrollment
United States
60 participants60 participants
Sex: Female, Male
Female
15 Participants15 Participants
Sex: Female, Male
Male
45 Participants45 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —— / —— / —
other
Total, other adverse events
33 / 600 / 00 / 00 / 00 / 00 / 0
serious
Total, serious adverse events
24 / 600 / 00 / 00 / 00 / 00 / 0

Outcome results

Primary

Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.

Mixed chimerism will be defined as the detection of donor T cells (CD3+) and granulocytes (CD 33+), as a proportion of the total T cell and granulocyte population, respectively, of greater than 5% and less than 95% in the peripheral blood. Full donor chimerism is defined as \> 95% donor CD3+ T cells.

Time frame: 100 days after transplant

Population: No subjects were enrolled onto groups beyond Dose level 1 because the dose escalation was not triggered over the course of the study.

ArmMeasureGroupValue (NUMBER)
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD3 - Graft rejection3.3 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD3 - Mixed chimerism18.3 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD3 - Full donor chimerism70 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD3 - Unknown8.33 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD33 - Graft Rejection1.7 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD33 - Mixed chimerism3.3 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD33 - Full donor chimerism80 percentage of participants
Dose Level 1 (No Campath)Determine Whether Engraftment Can be Maintained With a Single Dose Fludarabine, DLI and Continued MMF/CSP, Defined as Rejection Rate < 20%.CD33 - Unknown15 percentage of participants
Primary

Evaluate the Risk of Occurrence of Acute and Chronic GVHD

Percentage patients who developed acute/chronic GVHD. aGVHD Stages Skin: 1. a maculopapular eruption involving \< 25% BSA 2. a maculopapular eruption involving 25 - 50% BSA 3. generalized erythroderma 4. generalized erythroderma with bullous formation and often with desquamation Liver: 1. bilirubin 2.0 - 3.0 mg/100 mL 2. bilirubin 3 - 5.9 mg/100 mL 3. bilirubin 6 - 14.9 mg/100 mL 4. bilirubin \> 15 mg/100 mL Gut: Diarrhea is graded 1 - 4 in severity. Nausea and vomiting and/or anorexia caused by GVHD is assigned as 1 in severity. The severity of gut involvement is assigned to the most severe involvement noted. Patients with visible bloody diarrhea are at least stage 2 gut and grade 3 overall. aGVHD Grades Grade III: Stage 2 - 4 gastrointestinal involvement and/or +2 to +4 liver involvement, with or without a rash Grade IV: Pattern and severity of GVHD similar to grade 3 with extreme constitutional symptoms or death

Time frame: 1 year after transplant

Population: No subjects were enrolled onto groups beyond Dose level 1 because the dose escalation was not triggered over the course of the study.

ArmMeasureGroupValue (NUMBER)
Dose Level 1 (No Campath)Evaluate the Risk of Occurrence of Acute and Chronic GVHDGrade III-IV aGVHD23.3 percentage of participants
Dose Level 1 (No Campath)Evaluate the Risk of Occurrence of Acute and Chronic GVHDcGVHD41.7 percentage of participants
Primary

Evaluate the Risk of Transplant Related Mortality.

Percentage patients with Day 100 transplant related mortality.

Time frame: 100 days after transplant

Population: No subjects were enrolled onto groups beyond Dose level 1 because the dose escalation was not triggered over the course of the study.

ArmMeasureValue (NUMBER)
Dose Level 1 (No Campath)Evaluate the Risk of Transplant Related Mortality.20 percentage of participants
Secondary

Evaluate the Risk for Disease Progression and Relapse

Percentage patients who relapsed/progressed within 1 year post-transplant.

Time frame: 1 year after transplant

Population: No subjects were enrolled onto groups beyond Dose level 1 because the dose escalation was not triggered over the course of the study.

ArmMeasureValue (NUMBER)
Dose Level 1 (No Campath)Evaluate the Risk for Disease Progression and Relapse21.7 percentage of participants
Secondary

Evaluate the Risk/Incidence of Infections

Percentage patients who experienced infections within 100 days post-transplant.

Time frame: 100 days after transplant

Population: No subjects were enrolled onto groups beyond Dose level 1 because the dose escalation was not triggered over the course of the study.

ArmMeasureValue (NUMBER)
Dose Level 1 (No Campath)Evaluate the Risk/Incidence of Infections91.7 percentage of participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026