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Inducible Regulatory T Cells (iTregs) in Non-Myeloablative Sibling Donor Peripheral Blood Stem Cell Transplantation

Dose Escalation Study With Extension of Inducible Regulatory T Cells (iTregs) in Adult Patients Undergoing Non-Myeloablative HLA Identical Sibling Donor Peripheral Blood Stem Cell Transplantation

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01634217
Enrollment
16
Registered
2012-07-06
Start date
2013-11-08
Completion date
2018-12-01
Last updated
2019-01-18

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

Conditions

Acute Lymphocytic Leukemia, Acute Myelogenous Leukemia, Chronic Lymphocytic Leukemia, Chronic Myelogenous Leukemia, Hodgkin Lymphoma, Multiple Myeloma, Myelodysplastic Syndrome, Non-Hodgkin Lymphoma

Brief summary

This is a phase I single center dose escalation study with an extension at the best available dose to determine the tolerability of inducible regulatory T cells (iTregs) when given to adult patients undergoing non-myeloablative HLA-identical sibling donor peripheral blood stem cell (PBSC) transplantation for the treatment of a high risk malignancy. Up to 5 dose cohorts will be tested. Once the tolerable dose is determined for iTregs, enrollment will continue with an additional 10 patients using sirolimus/Mycophenolate mofetil (MMF) graft-versus-host disease (GVHD) prophylaxis to gain further safety information and to provide pilot data in this treatment setting.

Detailed description

Co-enrollment in University Of Minnesota protocol MT2001-10 is required and transplantation will be according to that protocol with iTregs administered the morning of day 0 followed no sooner than 4 hours later by the PBSC transplantation.

Interventions

BIOLOGICALiTreg

The iTregs will be infused at the assigned dose without a filter or pump slowly by gravity over 15-60 minutes. The iTregs should be given at least 4 hours before the peripheral blood stem cell (PBSC) infusion (MT2001-10).

Sponsors

Masonic Cancer Center, University of Minnesota
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* 18 - 75 years of age with an HLA-identical sibling donor * One of the following disease categories: * Acute myelogenous leukemia - high risk CR1 (as evidenced by preceding MDS, intermediate to high risk cytogenetics, ≥ 2 cycles to obtain CR, erythroblastic or megakaryocytic leukemia; CR2+. All patients must be in CR as defined by hematological recovery (ANC \> 0.5x 109/L), AND \<5% blasts by light microscopy within the bone marrow with a cellularity of ≥15%. * Acute lymphocytic leukemia - high risk CR1 \[t(9;22), t (1:19), t(4;11) or other MLL rearrangements\] or \>1cycle to obtain CR; CR2+. All patients must be in CR as defined by hematological recovery (ANC \> 0.5x 109/L), AND \<5% blasts by light microscopy within the bone marrow with a cellularity of ≥15%. * Chronic myelogenous leukemia all types except blast crisis (note treated blast crisis in chronic phase is eligible) * Non-Hodgkin lymphoma or Hodgkin lymphoma demonstrating chemosensitive disease * Myelodysplastic syndrome with severe pancytopenia, leading to either transfusion dependency or increased risk for infections * Performance status: Karnofsky ≥ 60% * Adequate organ function within 28 days of study enrollment defined as: * Liver: SGOT and SGPT \< 5.0 x ULN; total bilirubin \< 3 x ULN * Renal: serum creatinine \< 2.0 mg/dl or glomerular filtration rate (GFR) \> 40 mL/min/1.73m2. Patients with a creatinine \> 1.2 mg/dl or a history of renal dysfunction must have glomerular filtration rate (GFR) \> 40 mL/min/1.73m2 * Albumin: \> 2.5 g/dL * Cardiac: No decompensated CHF or uncontrolled arrhythmia; ejection fraction \> 35% within 6 weeks prior to study enrollment * Pulmonary: No O2 requirements; DLCO \> 30% predicted within 6 weeks prior to study enrollment * If recent mold infection (e.g. aspergillus) must have minimum of 30 days of therapy and responsive disease and be cleared by Infectious Disease * Sexually active females of child bearing potential and males must agree to use effective contraception for the duration of the transplant period * Voluntary written consent

Exclusion criteria

* Pregnancy or breast feeding - women of childbearing potential must have a negative pregnancy test within 28 days of study enrollment. * Prior myeloablative transplant within previous 3 months of study enrollment. * Evidence of HIV infection or known HIV positive serology. * Active serious infection.

Design outcomes

Primary

MeasureTime frameDescription
Incidence of grade 3-5 infusional toxicityWithin 48 Hours After iTregs AdministrationTargeted adverse events and unexpected events not explained by the PBSCT or disease will be collected \[(1-4 hours after the iTreg infusion and before the PBSCT at day 0) and 24 hours and 48 hours after the iTreg infusion (+/- 2 hours)\]

Secondary

MeasureTime frameDescription
Cumulative incidence of grade II-IV acute graft-versus-host disease (GVHD)Day 100Graft-versus-host disease (GVHD) is a complication that can occur after a stem cell or bone marrow transplant in which the newly transplanted material attacks the transplant recipient's body. Abstracted from the routine clinical data collected for the primary transplant protocol (MT2001-10).
Incidence of chronic graft-versus-host disease (GVHD)12 MonthsGraft-versus-host disease (GVHD) is a complication that can occur after a stem cell or bone marrow transplant in which the newly transplanted material attacks the transplant recipient's body. Abstracted from the routine clinical data collected for the primary transplant protocol (MT2001-10).
Relapse of Disease12 MonthsThe return of signs and symptoms of a disease after a remission.
Survival1 YearNumber (count) of patients alive at 1 year after treatment.

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 15, 2026