Genetically Engineered Cells (CD83 CAR T Cells) for the Treatment of Relapsed or Refractory Acute Myeloid Leukemia

NCT06871410 | Recruiting Phase 1 DMC FDA Drug

• 2 other identifiers: I-3916824NCI-2025-01523
• Study Type: interventional
• Target: 26
• Locations: 1 country
• Sites: 1

Brief Summary

This phase I trial tests the safety, side effects, and best dose of genetically engineered cells (CD83 chimeric antigen receptor \[CAR\] T cells) in treating patients with acute myeloid leukemia (AML) that has come back after a period of improvement (relapsed) or has not responded to previous treatment (refractory). CD83 is a protein that is found on AML blasts. Blasts are abnormal immature white blood cells that can multiply uncontrollably: filling up the bone marrow and preventing the production of other cells important for survival. CD83 CAR T cells represent a new cell therapy to eliminate AML blasts, while avoiding the risk for graft versus host disease (GVHD) after stem cell transplant to replace bone marrow or, tumor toxicity like myeloid aplasia where the body's own immune system causes damage to the bone marrow stem cells. Therefore, human CD83 CAR T cells are a promising cell-based approach to preventing two critical complications of stem-cell transplant - GVHD and relapse. Giving CD83 CAR T cells may be safe, tolerable, and/or effective in treating patients with relapsed or refractory AML.

Conditions

Refractory Acute Myeloid Leukemia; Recurrent Acute Myeloid Leukemia

Outcome Measures

Primary Outcomes (1)

• Incidence of dose-limiting toxicity (DLT)

  Will be defined as any adverse events based on Common Terminology Criteria for Adverse Events (CTCAE) version (v)5. Cytokine release syndrome(CRS)/immune effector cell-associated neurotoxicity syndrome will be graded according to American Society for Transplantation and Cellular Therapy (ASTCT) Consensus Guidelines. The DLTs will be summarized by dose level using frequencies and relative frequencies. Will employ the Bayesian optimal interval design to find the maximal tolerated dose (MTD). The target DLT rate for the MTD is = 0.33.

  Up to 28 days

Secondary Outcomes (10)

• Objective response

  At 28 days and 1 year

• Overall survival

  From treatment initiation until death due to any cause or last follow-up, assessed up to 1 year

• Progression-free survival

  From treatment initiation until disease progression/relapse, death due to any cause, subsequent treatment (censored), or last follow-up, assessed up to 1 year

• Hematologic recovery

  At 28 days

• Time to hematologic recovery

  From treatment initiation until hematologic recovery or last follow-up, assessed up to 1 year

Study Arms (1)

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

EXPERIMENTAL

Patients undergo leukapheresis to obtain PBMCs for CD83 CAR T-cell product manufacturing on day -21 and may receive hydroxyurea at the discretion of the treating physician on study. Patients then receive fludarabine IV over 30 minutes and cyclophosphamide IV over 2 hours on days -5 to -3 in the absence of disease progression or unacceptable toxicity. Patients then receive CD83 CAR T-cells IV over 15 minutes on day 0. Patients also undergo ECHO and chest x-ray during screening, blood sample collection throughout the study, and CT and/or PET, as well as lumbar puncture as clinically indicated. In addition, patients may undergo bone marrow aspiration throughout the study.

Drug: Autologous Anti-CD83 CAR T-cells; Procedure: Biospecimen Collection; Procedure: Chest Radiography; Procedure: Computed Tomography; Drug: Cyclophosphamide; Procedure: Echocardiography; Drug: Fludarabine Phosphate; Drug: Hydroxyurea; Procedure: Leukapheresis; Procedure: Lumbar Puncture; Procedure: Positron Emission Tomography; Other: Questionnaire Administration

Interventions

Autologous Anti-CD83 CAR T-cells DRUG

Given IV

Also known as: Autologous Anti-CD83 CAR T Cells; Autologous Anti-CD83 CAR-T Cells

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Biospecimen Collection PROCEDURE

Undergo bone marrow aspiration blood sample collection

Also known as: Biological Sample Collection, Biospecimen Collected, Specimen Collection

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Chest Radiography PROCEDURE

Undergo chest x-ray

Also known as: Chest X-ray

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Computed Tomography PROCEDURE

Undergo CT

Also known as: CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography, Computerized axial tomography (procedure), Computerized Tomography, Computerized Tomography (CT) scan, CT, CT Scan, tomography

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Cyclophosphamide DRUG

Given IV

Also known as: (-)-Cyclophosphamide, 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate, Asta B 518, B 518, B-518, B518, Carloxan, Ciclofosfamida, Ciclofosfamide, Cicloxal, Clafen, Claphene, CP monohydrate, CTX, CYCLO-cell, Cycloblastin, Cycloblastine, Cyclophospham, Cyclophosphamid monohydrate, Cyclophosphamide Monohydrate, Cyclophosphamidum, Cyclophosphan, Cyclophosphane, Cyclophosphanum, Cyclostin, Cyclostine, Cytophosphan, Cytophosphane, Cytoxan, Fosfaseron, Genoxal, Genuxal, Ledoxina, Mitoxan, Neosar, Revimmune, Syklofosfamid, WR 138719, WR- 138719, WR-138719, WR138719

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Echocardiography PROCEDURE

Undergo ECHO

Also known as: EC

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Fludarabine Phosphate DRUG

Given IV

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

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Hydroxyurea DRUG

Given hydroxyurea

Also known as: Droxia, Hydrea, Hydroxycarbamide, Litalir, Onco-Carbide, Oncocarbide, Oxeron, SQ 1089, SQ-1089, Syrea, WR 83799

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Leukapheresis PROCEDURE

Undergo leukapheresis

Also known as: Leukocyte Adsorptive Apheresis, Leukocytopheresis, Therapeutic Leukopheresis, White Blood Cell Reduction Apheresis

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Lumbar Puncture PROCEDURE

Undergo lumbar puncture

Also known as: LP, Spinal Tap

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Positron Emission Tomography PROCEDURE

Undergo PET

Also known as: Medical Imaging, Positron Emission Tomography, PET, PET Scan, Positron emission tomography (procedure), Positron Emission Tomography Scan, Positron-Emission Tomography, PT

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Questionnaire Administration OTHER

Ancillary studies

Treatment (fludarabine, cyclophosphamide, CD83 CAR T-cells)

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Age ≥ 18 years old.
• Karnofsky performance status score ≥ 70%.
• Relapsed or refractory AML based upon ELN 2022 criteria.
• Creatinine clearance: ≥ 40 mL/min (Cockroft-Gault).
• Total bilirubin: ≤ 2mg/dL except for patients with Gilbert's syndrome, hemolysis, or related to disease.
• Aspartate aminotransferase (AST) and alanine transaminase (ALT) \< 3.0 x upper limit of normal (ULN).
• Left ventricular (LV) ejection fraction: \> 45% and be free of symptomatic congestive heart failure or uncontrolled arrhythmia.
• Oxygen (O2) saturation: ≥ 92% on room air without needs for supplemental O2.
• Absolute lymphocyte count: ≥ 0.2 x 10\^9/L, HCT of ≥ 27% and platelets of ≥ 20 x 10\^9/L. Transfusion support is allowed to meet HCT and platelet parameters prior to apheresis.
• Life expectancy ≥12 weeks from the time of enrollment, per clinical judgment.
• Negative serum pregnancy test in females of child-bearing potential (FOCBP). FOCBP is defined as any female who has experienced menarche and who has not undergone successful surgical sterilization or who is not postmenopausal.
• If history of allogeneic HCT, must have completed transplant at least 3 months prior, be off immunosuppression, including ruxolitinib, at least 2 weeks prior to apheresis, and have no evidence of GVHD requiring treatment at enrollment.
• Participants of child-bearing potential must agree to use adequate contraceptive methods (e.g., hormonal or barrier method of birth control; abstinence) prior to study entry and for 12 months following duration of study participation. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately.
• Participants must be considered preliminarily eligible for an allogeneic hematopoietic cell transplantation, with potential donors identified per a transplant and cellular therapy consult at Roswell Park Comprehensive Cancer Center.
• Participant must understand the investigational nature of this study and sign an Independent Ethics Committee/Institutional Review Board approved written informed consent form prior to receiving any study related procedure.

You may not qualify if:

• Concomitant systemic glucocorticoid use at a dose equivalent to \> 10 mg daily prednisone at the time of apheresis and/or within 4 weeks of CD83 CAR T infusion for any reasons other than GVHD.
• Diagnosis of acute promyelocytic leukemia (APL; AML M3 by French-American-British \[FAB\] classification).
• Active central nervous system (CNS) leukemia; patients with history of CNS leukemia in complete response (CR) are eligible.
• Patients enrolled in another investigational therapy protocol for their disease within 14 days or 5 half-lives prior to leukapheresis, whichever is shorter.
• Patients requiring agents or any treatments other than hydroxyurea, single agent cytarbine,hypomethylating agents with or without ventoclax and/or targeted agents (i.e., FLT3, IDH2 or IDH1 inhibitors) to control blast counts within 14 days or 5 half-lives (whichever is shorter) prior to lymphodepletion.
• Ongoing uncontrolled serious infection, pulmonary disease or psycho/social concerns.
• HIV seropositivity or active hepatitis B or C infection within (defined by positive polymerase chain reaction \[PCR\]) 4 weeks of enrollment.
• Other active malignancy within 2 years of study entry, except for basal cell cancer of skin, cervical cancer treated surgically with curative intent or localized prostate cancer managed with observational approach.
• Active grade II-IV acute GVHD in patients with relapsed AML after HCT requiring treatment.
• Prior solid organ transplant.
• Active autoimmune disease requiring immunosuppressive therapy.
• Pregnant or nursing female participants.
• Unwilling or unable to follow protocol requirements.
• Any condition which in the investigator's opinion deems the participant an unsuitable candidate to receive study drug.

Sponsors & Collaborators

• Roswell Park Cancer Institute: lead

Study Sites (1)

Roswell Park Cancer Institute

Buffalo, New York, 14263, United States

RECRUITING

MeSH Terms

Conditions

Leukemia, Myeloid, Acute

Interventions

Specimen Handling; X-Rays; Cyclophosphamide; fludarabine phosphate; Hydroxyurea; Leukapheresis; Spinal Puncture; Magnetic Resonance Spectroscopy

Condition Hierarchy (Ancestors)

Leukemia, Myeloid; Leukemia; Neoplasms by Histologic Type; Neoplasms; Hematologic Diseases; Hemic and Lymphatic Diseases

Intervention Hierarchy (Ancestors)

Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Investigative Techniques; Electromagnetic Radiation; Electromagnetic Phenomena; Magnetic Phenomena; Physical Phenomena; Radiation; Radiation, Ionizing; Phosphoramide Mustards; Nitrogen Mustard Compounds; Mustard Compounds; Hydrocarbons, Halogenated; Hydrocarbons; Organic Chemicals; Phosphoramides; Organophosphorus Compounds; Urea; Amides; Cytapheresis; Biological Therapy; Therapeutics; Blood Component Removal; Leukocyte Reduction Procedures; Cell Separation; Cytological Techniques; Biopsy; Diagnostic Techniques, Neurological; Punctures; Surgical Procedures, Operative; Spectrum Analysis; Chemistry Techniques, Analytical

Study Officials

• Shernan G Holtan

  Roswell Park Cancer Institute

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 10, 2025
• First Posted: March 12, 2025
• Study Start: March 2, 2026
• Primary Completion (Estimated): April 1, 2028
• Study Completion (Estimated): April 1, 2028
• Last Updated: March 24, 2026

Record last verified: 2026-03

Locations

US (1)