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Safety and Efficacy of Pentostatin and Low Dose TBI With Allogenic Peripheral Blood Stem Cell Transplant

Allogeneic Peripheral Blood Stem Cell Transplantation With Minimally Myelosuppressive Regimen of Pentostatin and Low-dose Total-body Irradiation

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00571662
Enrollment
76
Registered
2007-12-12
Start date
2000-12-08
Completion date
2008-12-30
Last updated
2023-10-24

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

Conditions

Acute Myelogenous Leukemia, Acute Lymphocytic Leukemia, Chronic Myelogenous Leukemia, Chronic Lymphocytic Leukemia, Myelodysplastic Syndromes, Multiple Myeloma, Non-Hodgkins Lymphoma, Hodgkins Disease, Peripheral T-cell Lymphoma

Brief summary

This is a continuation of a pilot study which is now regarded as a phase II trial with a plan to enroll an additional 40 patients (20 related and 20 unrelated donor transplants) with hematological malignancy assessing the safety and efficacy of a minimally myelosuppressive regimen with pentostatin and low-dose total body irradiation (TBI) followed by allogeneic peripheral blood stem cell transplantation (alloPSCT).

Detailed description

This is a pilot study which began with a plan to enroll 50 patients (20 related and 30 unrelated donor transplants) with hematological malignancy assessing the safety and efficacy of a minimally myelosuppressive regimen with Pentostatin and low-dose total body irradiation (TBI) followed by allogeneic peripheral blood stem cell transplantation (alloPSCT). Patients with persistent or progressive malignancy after transplantation will be treated with GM-CSF (cytokine therapy) to assess its toxicity and potential therapeutic efficacy. Patients with persistent or progressive disease who fail or do not qualify for the cytokine therapy portion of the study will become candidates for donor leukocyte infusions. The purpose of this protocol remains a pilot study which is now regarded as a phase II trial with a plan to enroll 40 ADDITIONAL patients (20 related and 20 unrelated donor transplants) with hematological malignancy assessing the safety and efficacy of a modified version of the original preparative regimen of Pentostatin and low-dose total body irradiation (TBI) followed by allogeneic peripheral blood stem cell transplantation (alloPSCT). Patients who fail will become candidates for donor-leukocyte infusion (DLI). Primary Objectives 1. To determine the safety of treating hematological malignancies by establishing donor hematopoietic chimerism using pentostatin and low-dose total body irradiation followed by allogeneic peripheral blood stem cell transplantation. 2. To determine the immunomodulatory effects of pentostatin as part of the conditioning regimen for allogeneic peripheral blood stem cell transplantation. Secondary Objectives 1. To determine the incidence of infections after using a minimally myelosuppressive conditioning regimen. 2. To determine the kinetics of hematological and immunological reconstitution after allotransplantation with a minimally myelosuppressive conditioning regimen. 3. To determine the incidence of chronic GVHD after using allogeneic peripheral blood stem cell transplantation with a minimally myelosuppressive preparative regimen. 4. To evaluate the role of the preparative regimen and donor source (related versus unrelated) on inflammatory cytokine profiles. 5. To evaluate blood and where possible, biopsy specimens for a recently identified nuclear protein (molecular weight 44/46) in mononuclear cells obtained from study subjects. Interventions, evaluation, and follow up will include: Pentostatin 4 mg/m\^2/d intravenously once a day x 3 days will be administered with 1000 cc NS hydration before and after pentostatin ten days prior to stem cell infusion (days -10, -9, and -8). Total-body irradiation (TBI): TBI 2.0 Gy will be given on day -1. Antiemetics will be given as needed. Patients will receive one liter normal saline over 2 hours pre TBI. A bone marrow biopsy and aspiration with cytogenetics and flow cytometry will be performed on Day +28, Day +70 and 6, 12, 18 and 24 months following the transplant to monitor hematologic recovery. DNA fingerprinting will also be conducted at the same time at 3, 4, 5, 6, 12, 18, and 24 months to determine chimerism.

Interventions

DRUGPentostatin

4 mg/m\^2 intravenous(IV)once a day(QD)x3days (days -10, -9, -8)

TBI will consist of 2.0 GY at 8-12cGy/min via 6MV photons delivered AP/PA fields, without lung blocks or via lateral fields with lucite compensator along the head and neck region. TLD (thermal luminescent dosimetry) will be used to verify dose uniformity. TBI will be given on day -1.

CsA will be given at 2.0 mg/kg intravenous (IV) Q 12hrs on days -1,0,and+1 (total 6 doses) then converted to oral at 2 mg/kg by mouth (PO) twice a day (BID) until day+80, then tapered 10% per week over approximately 3 months if no GVHD for related donor transplants. For unrelated CsA will be given at same dose and schedule until day+100 then tapered by 10% per week if no GVHD

DRUGMycophenolate Mofetil (MMF)

MMF 15 mg/kg by mouth twice a day (PO BID) will be given from day 0-27 then stopped without tapering for related donor transplants. For unrelated donor transplants MMF will be given at same dose until day+40 then tapered over 2months. in absence of GVHD. Doses will be rounded to nearest 250 mg.

DRUGG-CSF

10 mcg/kg/day subcutaneously for at least 4 consecutive days.

Sponsors

Astex Pharmaceuticals, Inc.
CollaboratorINDUSTRY
University of Nebraska
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
19 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

Age 19-75 years 1. Patients who relapse after autologous stem cell transplantation. 2. Patients who are candidates for an autologous or conventional allogeneic stem cell transplantation from a disease standpoint but who do not qualify functionally (from the point of view of organ function, or performance status) for a myeloablative protocol. 3. Any patient, where in the opinion of the primary treating oncologist, nonmyleoablative therapy would be the treatment option in the best patients interest providing the patient fits all other eligibility criteria for this protocol. Identification of a matched related or unrelated stem cell donor Diseases: Acute myelogenous leukemia first complete remission with high-risk cytogenetics\>second complete remission minimal residual disease (\<10% blasts\*). Acute lymphocytic leukemia first complete remission with high-risk cytogenetics \>second complete remission minimal residual disease (\<10% blasts\*). Chronic myelogenous leukemia first chronic phase, accelerated phase (\<10% blasts\*)blast phase with minimal residual disease (\<10% blasts\*)second chronic phase. Chronic lymphocytic leukemia recurrence after the front line regimen (related donor transplant), chemorefractory disease (unrelated donor transplant),T-CLL in partial remission or any minimal residual disease. Myelodysplastic syndromes refractory anemia with or without ringed sideroblasts,RAEB, RAEB-T, and CMML (\< than 10% blasts\*). \*both in peripheral blood and bone marrow Multiple myeloma - after receiving at least one regimen of prior chemotherapy Non-Hodgkin's Lymphomas: Small Lympho(plasma)cytic Lymphoma (B-SLL, B-LPL): recurrence after a front line regimen (related donor transplant), or chemorefractory disease (related or unrelated donor transplant). Follicular Low-Grade Lymphoma, Marginal Zone Lymphomas (splenic, nodal, or extranodal/MALT type): chemorefractory disease or \> 2 prior regimens. Mantle Cell Lymphoma: first complete or partial remission, refractory disease, or failed prior ASCT. Diffuse Large B-cell Lymphoma, Follicular Large cell Lymphoma, Peripheral T-cell Lymphoma, Anaplastic Large Cell Lymphoma: refractory disease, or failed prior ASCT. Burkitt or Acute Lymphoblastic Lymphomas: high-risk disease in remission, chemosensitive persistent or recurrent disease. Cutaneous T-cell Lymphomas: (Mycosis Fungoides, Sezary Syndrome): chemorefractory disease of \> 2 prior regimens Hodgkins Disease: refractory or persistent disease and not candidate for ASCT, or failed prior ASCT. Peripheral T-cell Lymphoma

Exclusion criteria

* Age \> 75 years and \< 19 years * progressive disease within 8 weeks of prior therapy or within 12 weeks after prior autologous stem cell transplantation * Active CNS malignancy (patients with known positive CSF cytology or parenchymal lesions visible by CT or MRI) * Fertile men or women unwilling to use appropriate contraceptive techniques during and for 12 months following treatment * Females who are pregnant * Patients who are HIV seropositive * Active uncontrolled infection or immediate life-threatening condition at the time of enrollment * Significant Organ dysfunction: 1. Calculated Creatinine Clearance \<55ml/min 2. cardiac ejection fraction \<40%, NYHA class II or greater cardiac disease. 3. DLCO \< 40% , FEV1/FVC ratio \<50% predicted, or receiving supplementary continuous oxygen 4. total bilirubin \> 2x upper limit of normal (unless due to Gilberts disease or malignancy), ALT and AST 4x the upper limit of normal * Karnofsky score \<60% * Patients with uncontrolled medical illnesses (e.g., uncontrolled systemic hypertension, diabetes) Donor Inclusion Criteria: * HLA genotypically matched relative * siblings or first-degree relatives matched at HLA-A, B, or DR loci (6 antigen match) are acceptable donors * HLA matched unrelated volunteer donor * unrelated donor matched at HLA-A, B, or DR loci (6 antigen match) are acceptable donors * One antigen mismatch related or unrelated donor will also be acceptable, molecular typing needs to be used at each H LA-A, B, or DR loci in case of mismatched unrelated donor. Donor

Design outcomes

Primary

MeasureTime frameDescription
Percent of Participants With Chimerism: Full Donor Chimerism Defined as >95% Donor CD3+ Cell in Blood as Assessed by DNA Fingerprintingdays +28 and +70the efficacy of the regimen as determined by engraftment rate and establishment of donor hematopoietic chimerism at day +28 and day +70.
Toxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Conditioning regimen to count recovery (D + 28 post transplant)

Secondary

MeasureTime frameDescription
Incidence of Acute and Chronic Graft-versus-host Diseasetwice weekly until day 100 up to 1 year post transplantIncidence of acute and chronic graft-versus-host disease. Acute GVHD usually occurs during the first three months following transplant. Chronic GVHD usually develops after the third month post-transplant.
Responses to Therapyevery 6 mo. up to 2 yearsevent-free and overall survival at 12 months
Kinetics of Immunologic Reconstitutionat day 100 post transplantationRate of return of immune cells after allogeneic transplantation

Countries

United States

Participant flow

Recruitment details

Between November 2001 and February 2007 sixty eight patients were treated on this protocol and have been included in the analysis

Participants by arm

ArmCount
Cohort I
Pentostatin to be administered intravenously on days -10, -9, and -8 at a dose of 4mg/m2/day
76
Total76

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyAdverse Event5
Overall Studypsychiatric instability1
Overall StudyWithdrawal by Subject2

Baseline characteristics

CharacteristicCohort I
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
5 Participants
Age, Categorical
Between 18 and 65 years
71 Participants
Age, Continuous56 years
Region of Enrollment
United States
76 participants
Sex: Female, Male
Female
29 Participants
Sex: Female, Male
Male
47 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
0 / 76
serious
Total, serious adverse events
26 / 76

Outcome results

Primary

Percent of Participants With Chimerism: Full Donor Chimerism Defined as >95% Donor CD3+ Cell in Blood as Assessed by DNA Fingerprinting

the efficacy of the regimen as determined by engraftment rate and establishment of donor hematopoietic chimerism at day +28 and day +70.

Time frame: days +28 and +70

ArmMeasureGroupValue (MEDIAN)
Cohort IPercent of Participants With Chimerism: Full Donor Chimerism Defined as >95% Donor CD3+ Cell in Blood as Assessed by DNA FingerprintingDay 2885 percent of participants
Cohort IPercent of Participants With Chimerism: Full Donor Chimerism Defined as >95% Donor CD3+ Cell in Blood as Assessed by DNA FingerprintingDay 7090 percent of participants
Primary

Toxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)

Time frame: Conditioning regimen to count recovery (D + 28 post transplant)

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Absolute neutrophil count < 500/mm^340 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)platelet count < 20,000/mm^329 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Grade 3 or 4 Fever2 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Grade 3 or 4 hypokalemia1 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Grade 3 or 4 bacteremia2 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Grade 3 or 4 infection6 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Grade 3 or 4 renal toxicity1 Participants
Cohort IToxicity for the Combination of Pentostatin and Low Dose Total Body Irradiation (TBI)Grade 3 or 4 thromboembolism1 Participants
Secondary

Incidence of Acute and Chronic Graft-versus-host Disease

Incidence of acute and chronic graft-versus-host disease. Acute GVHD usually occurs during the first three months following transplant. Chronic GVHD usually develops after the third month post-transplant.

Time frame: twice weekly until day 100 up to 1 year post transplant

ArmMeasureGroupValue (NUMBER)
Cohort IIncidence of Acute and Chronic Graft-versus-host DiseaseAcute GVHD31 Percent of Particpants
Cohort IIncidence of Acute and Chronic Graft-versus-host DiseaseChronic GVHD33 Percent of Particpants
Secondary

Kinetics of Immunologic Reconstitution

Rate of return of immune cells after allogeneic transplantation

Time frame: at day 100 post transplantation

ArmMeasureGroupValue (MEDIAN)
Cohort IKinetics of Immunologic ReconstitutionCD3 cells13 percentage of cells in peripheral blood
Cohort IKinetics of Immunologic ReconstitutionCD4 cells5 percentage of cells in peripheral blood
Cohort IKinetics of Immunologic ReconstitutionCD8 cells5 percentage of cells in peripheral blood
Day + 28 Post TransplantKinetics of Immunologic ReconstitutionCD3 cells7 percentage of cells in peripheral blood
Day + 28 Post TransplantKinetics of Immunologic ReconstitutionCD4 cells3.5 percentage of cells in peripheral blood
Day + 28 Post TransplantKinetics of Immunologic ReconstitutionCD8 cells1.7 percentage of cells in peripheral blood
Secondary

Responses to Therapy

event-free and overall survival at 12 months

Time frame: every 6 mo. up to 2 years

ArmMeasureGroupValue (NUMBER)
Cohort IResponses to TherapyEvent free survival52 Percent of Participants
Cohort IResponses to TherapyOverall survival59 Percent of Participants

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