IS-free Treg HaploHCT

Part of paid clinical trials in Boston, Massachusetts.

Sponsor
Dana-Farber Cancer Institute
Study ID
NCT04678401
Phase
PHASE1
Status
Recruiting
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Conditions

  • Graft Vs Host Disease
  • Myelodysplastic Syndromes
  • Myeloid Leukemia in Relapse (Disorder)
  • Myeloid Leukemia, Acute
  • Stem Cell Transplant Complications

Eligibility Criteria

Sex
ALL
Age
18 Years - 75 Years
Healthy Volunteers
Not accepted

Interventions

  • Radiation — RADIATION
    For MAC regimen: Total Myeloid and Lymphoid Irradiation (TMLI) delivered through Radiation Oncology institutional standards and comprised of 13.5 Gy TMI (9 fractions, 1.5 Gy per fraction, 2 fractions per day) and 11.7 Gy TLI (9 fractions, 1.3 Gy per fraction, 2 fractions per day). OR Total Body Irradiation (TBI) comprised of 12 Gy (6 fractions, 2 Gy per fraction, 2 fractions per day) For RIC regimen: TBI comprised of 2 Gy in 1 fraction.
  • Fludarabine — DRUG
    For MAC regimen: 30 mg/m\^2/d in 100 ml normal saline (NS) will be administered as a bolus infusion administered by IV infusion over approximately 30 minutes for 5 days (on day -10, -9, -8, -7, -6) For RIC regimen: 40 mg/m\^2/d in 100 ml NS will be administered as a bolus by IV infusion over approximately 30 minutes for 4 days (on day -10, -9, -8, -7)
  • Thiotepa — DRUG
    For MAC regimen: 3.75 mg/kg diluted in NS to a final concentration of 1mg/mL will be administered by IV infusion over approximately 4 hours daily for 2 days (on day -10, -9) For RIC regimen: 5 mg/kg diluted in NS to a final concentration of 1mg/mL will be administered by IV infusion over approximately 4 hours twice daily for 1 day (on day -11)
  • Cyclophosphamide — DRUG
    For MAC regimen only: 15 mg/kg diluted in NS per institutional standard and will be administered by IV over 1 hour or as directed per institutional standard practice, daily on D-8, -7.
  • Mesna — DRUG
    For MAC regimen only: 3.75mg/kg (25% of cyclophosphamide dose) diluted in 50 mL NS and administered IV over 30 min, will be infused starting 30 min prior to cyclophosphamide and for 3 doses thereafter, at 3, 6 and 9h after cyclophosphamide
  • Treg-enriched donor cell — BIOLOGICAL
    Target 'Treg-enriched' cell dose is 1-2 x 10\^6 cells/kg. Cells will be given intravenously on Day -4. The day -1 calculated unmodified PBMC T ('Teff') cell dose will be adjusted to maintain a targeted cell ratio of 2 'Treg-enriched' cells:1 'Teff' cell.
  • Unmodified donor T Cell — BIOLOGICAL
    Unmodified donor PBMCs will be infused at a calculated 'Teff' dose of 1x10\^6 CD3+ T cells/kg, adjusted per the caveats below: A) If the 'Treg-enriched' product infused was at target dose of 2x106 cells/kg but had ≥30% CD4+CD25+CD127hi cells, the unmodified 'Teff' (calculated) cell dose infused on day -1 will be halved to 0.5x10\^6 CD3+ T cells/kg. B) If the 'Treg-enriched' product was in the range of 1-2x106 cells/kg, the unmodified 'Teff' (calculated) cell dose on day -1 will be adjusted to between 0.5-1x10\^6 CD3+ T cells/kg, dosed to maintain a 2 'Treg-enriched':1 'Teff' (calculated) ratio of infused cells. C) If the 'Treg-enriched' product infused met both caveats A and B above, the unmodified 'Teff' (calculated) cell dose infused on day -1 will be halved to 0.5x10\^6 CD3+ T cells/kg.
  • CD34+ Haplo Peripheral Blood Stem Cell — PROCEDURE
    The megadose donor CD34+ PBSC infusion target is \>10x10\^6 CD34+ cells/kg (ABW or IBW, whichever is greater). If the CD34+ graft has \<6x10\^6 CD34+ cells/kg (ABW or IBW, whichever is greater) (below megadose minimum) it WILL be infused in order to rescue recipient hematopoiesis, and the patient will remain on study.
  • Melphalan — DRUG
    For RIC regimen only: 100 mg/m2 will be administered as a bolus by IV infusion over approximately 30 minutes for 1 day (on day -6)

Study Details

This research study is evaluating the safety and efficacy of the IS-free Treg-cell graft-engineered haplo transplant method in people with relapsed/refractory and Ultra-high risk acute myeloid leukemia (AML) and/or myelodysplastic syndromes (MDS) receiving a haploidentical donor allogeneic hematopoietic stem cell transplant (HSCT). The names of the study interventions involved in this study are: * Radiation-Total Myeloid and Lymphoid Irradiation (TMLI) * Chemotherapy (Fludarabine, Thiotepa, Cyclophosphamide plus Mesna) * Infusion of haplo Treg-enriched donor cells (experimental therapy) * Infusion of unmodified haplo donor T cells (includes cancer-fighting T effector cells) * Infusion of haplo donor CD34+ Peripheral Blood Stem Cells

Key Dates

Start date
Jan 12, 2021
Status verified
Oct 2025
Primary completion
Aug 31, 2028
Completion
Aug 31, 2029

Study Design

Enrollment
30 participants (estimated)
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT

Arms

  • Experimental: IS-FREE TREG GRAFT_ENGINEERED HaploHCT for relapsed/refractory AML or MDS EB-2 (Closed to Accrual)
    Please note that this arm is closed due to meeting accrual goal as of June 2024. This arm (Cohort A) included patients with rel/ref AML/MDS, with active disease despite at least 1 prior line of therapy. Treatment plan and follow up schedule: Day -15 to -6: Myeloablative conditioning regimen Radiation: Total Myeloid and Lymphoid Irradiation (TMLI) on Days -15 to -11 OR Total Body Irradiation (TBI) on Days -13 to -11 Chemotherapy: Fludarabine on Days -10 to -6, Thiotepa on Days -10 to -9, and Cyclophosphamide and Mesna on Days -8 and -7 Day -4: Treg-enriched donor cell infusion and GVHD assessment Day -1: Unmodified donor T Cell infusion and GVHD assessment Day 0: CD34+ Haplo Peripheral Blood Stem Cell Transplant and GVHD assessment Days 30, 60, 100, 180, 365 post-HSCT, participants will undergo testing and assessment of minimal residual disease (MRD) and (GVHD).
  • Experimental: IS-FREE TREG GRAFT_ENGINEERED HaploHCT for Ultra high-risk AML or MDS with mutated TP53
    This arm (Cohort B) includes patients with ultra-high-risk AML/MDS that meets the definition of "Myeloid Neoplasms with mutated TP53" per the 2022 International Consensus Classification, regardless of remission status at the time of transplant. Treatment plan and follow up schedule: Day -15 to -6: Myeloablative conditioning regimen Radiation: Total Myeloid and Lymphoid Irradiation (TMLI) on Days -15 to -11 OR Total Body Irradiation (TBI) on Days -13 to -11 Chemotherapy: Fludarabine on Days -10 to -6, Thiotepa on Days -10 to -9, and Cyclophosphamide and Mesna on Days -8 and -7 Day -4: Treg-enriched donor cell infusion and GVHD assessment Day -1: Unmodified donor T Cell infusion and GVHD assessment Day 0: CD34+ Haplo Peripheral Blood Stem Cell Transplant and GVHD assessment Days 30, 60, 100, 180, 365 post-HSCT, participants will undergo testing and assessment of minimal residual disease (MRD) and (GVHD).
  • Experimental: IS-FREE TREG GRAFT_ENGINEERED HaploHCT for Ultra high-risk AML or MDS with multi-hit or CK+ mut-TP53
    This arm (Cohort C) includes patients with ultra-high-risk AML/MDS that meets definition of 'Myeloid Neoplasms with multi-hit or complex karyotype (CK+) mutated TP53' per 2022 International Consensus Classification, with response (AML with \<5% BM blasts/MDS with \<10% BM blasts). Treatment plan and follow up schedule: Day -11 to -5: Reduced intensity conditioning regimen Chemotherapy: Thiotepa on Day -11, Fludarabine on Days -10 to -7, and Melphalan on Day -6 Radiation: Total Body Irradiation (TBI) on Day -5 Day -4: Treg-enriched donor cell infusion and GVHD assessment Day -1: Unmodified donor T Cell infusion and GVHD assessment Day 0: CD34+ Haplo Peripheral Blood Stem Cell Transplant and GVHD assessment Days 30, 60, 100, 180, 365 post-HSCT, participants will undergo testing and assessment of minimal residual disease (MRD) and (GVHD).

Primary Outcome Measure

Dose-limiting toxicities (DLT) [ Time Frame: 30 days after hematopoietic cell transplantation (HCT) ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
Dana Farber Cancer InstituteBostonMassachusetts02115
John Koreth, MBBS, DPhil
[email protected]
617-632-5168
John Koreth, MD (PRINCIPAL_INVESTIGATOR)

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By research site
Dana Farber Cancer Institute· Boston, MA

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