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Trial Title: Multi-antigen Specific CD8+ T Cells with Decitabine and Lymphodepleting Chemotherapy for the Treatment of Patients with Relapsed or Refractory AML or MDS Following an Allogeneic Hematopoietic Cell Transplantation from a Matched Donor

NCT ID: NCT06572631

Condition: Recurrent Acute Myeloid Leukemia
Recurrent Myelodysplastic Syndrome
Refractory Acute Myeloid Leukemia
Refractory Myelodysplastic Syndrome

Conditions: Official terms:
Leukemia
Leukemia, Myeloid
Leukemia, Myeloid, Acute
Preleukemia
Myelodysplastic Syndromes
Syndrome
Recurrence
Cyclophosphamide
Fludarabine
Decitabine

Study type: Interventional

Study phase: Phase 1

Overall status: Not yet recruiting

Study design:

Allocation: N/A

Intervention model: Single Group Assignment

Primary purpose: Treatment

Masking: None (Open Label)

Intervention:

Intervention type: Biological
Intervention name: Allogeneic CD8+ Leukemia-associated Antigens Specific T Cells NEXI-001
Description: Given IV
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: NEXI 001

Other name: NEXI-001

Other name: NEXI001

Intervention type: Procedure
Intervention name: Biospecimen Collection
Description: Undergo blood sample collection
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: Biological Sample Collection

Other name: Biospecimen Collected

Other name: Specimen Collection

Intervention type: Procedure
Intervention name: Bone Marrow Aspiration
Description: Undergo bone marrow aspiration
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Intervention type: Procedure
Intervention name: Bone Marrow Biopsy
Description: Undergo bone marrow biopsy
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: Biopsy of Bone Marrow

Other name: Biopsy, Bone Marrow

Intervention type: Procedure
Intervention name: Computed Tomography
Description: Undergo PET/CT
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: CAT

Other name: CAT Scan

Other name: Computed Axial Tomography

Other name: Computerized Axial Tomography

Other name: Computerized axial tomography (procedure)

Other name: Computerized Tomography

Other name: Computerized Tomography (CT) scan

Other name: CT

Other name: CT Scan

Other name: tomography

Intervention type: Drug
Intervention name: Cyclophosphamide
Description: Given IV
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: (-)-Cyclophosphamide

Other name: 2H-1,3,2-Oxazaphosphorine, 2-[bis(2-chloroethyl)amino]tetrahydro-, 2-oxide, monohydrate

Other name: Asta B 518

Other name: B 518

Other name: B-518

Other name: B518

Other name: Carloxan

Other name: Ciclofosfamida

Other name: Ciclofosfamide

Other name: Cicloxal

Other name: Clafen

Other name: Claphene

Other name: CP monohydrate

Other name: CTX

Other name: CYCLO-cell

Other name: Cycloblastin

Other name: Cycloblastine

Other name: Cyclophospham

Other name: Cyclophosphamid monohydrate

Other name: Cyclophosphamide Monohydrate

Other name: Cyclophosphamidum

Other name: Cyclophosphan

Other name: Cyclophosphane

Other name: Cyclophosphanum

Other name: Cyclostin

Other name: Cyclostine

Other name: Cytophosphan

Other name: Cytophosphane

Other name: Cytoxan

Other name: Fosfaseron

Other name: Genoxal

Other name: Genuxal

Other name: Ledoxina

Other name: Mitoxan

Other name: Neosar

Other name: Revimmune

Other name: Syklofosfamid

Other name: WR 138719

Other name: WR- 138719

Other name: WR-138719

Other name: WR138719

Intervention type: Drug
Intervention name: Decitabine
Description: Given IV
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: 5-Aza-2'-deoxycytidine

Other name: Dacogen

Other name: Decitabine for Injection

Other name: Deoxyazacytidine

Other name: Dezocitidine

Intervention type: Procedure
Intervention name: Echocardiography
Description: Undergo ECHO
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: EC

Intervention type: Drug
Intervention name: Fludarabine
Description: Given IV
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: Fluradosa

Intervention type: Procedure
Intervention name: Leukapheresis
Description: Undergo leukapheresis
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: Leukocytopheresis

Other name: Therapeutic Leukopheresis

Intervention type: Procedure
Intervention name: Magnetic Resonance Imaging
Description: Undergo MRI
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: Magnetic Resonance

Other name: Magnetic Resonance Imaging (MRI)

Other name: Magnetic resonance imaging (procedure)

Other name: Magnetic Resonance Imaging Scan

Other name: Medical Imaging, Magnetic Resonance / Nuclear Magnetic Resonance

Other name: MR

Other name: MR Imaging

Other name: MRI

Other name: MRI Scan

Other name: MRIs

Other name: NMR Imaging

Other name: NMRI

Other name: Nuclear Magnetic Resonance Imaging

Other name: sMRI

Other name: Structural MRI

Intervention type: Procedure
Intervention name: Positron Emission Tomography
Description: Undergo PET/CT
Arm group label: Treatment (NEXI-001, decitabine, chemotherapy)

Other name: Medical Imaging, Positron Emission Tomography

Other name: PET

Other name: PET Scan

Other name: Positron emission tomography (procedure)

Other name: Positron Emission Tomography Scan

Other name: Positron-Emission Tomography

Other name: proton magnetic resonance spectroscopic imaging

Other name: PT

Summary: This phase I trial tests the safety, side effects and best dose of NEXI-001 when given with decitabine and lymphodepleting chemotherapy in treating patients with acute myeloid leukemia (AML) or myelodysplastic syndrome (MDS) that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory) following an allogeneic hematopoietic cell transplantation from a matched donor. NEXI-001 is a type of chimeric antigen receptor T cell therapy in which a patient's T cells (a type of immune system cell) are changed in the laboratory so they will attack cancer cells. T cells are taken from a patient's blood. Then the gene for a special receptor that binds to a certain protein on the patient's cancer cells is added to the T cells in the laboratory. The special receptor is called a chimeric antigen receptor (CAR). Large numbers of the CAR T cells are grown in the laboratory and given to the patient by infusion for treatment of certain cancers. Decitabine is in a class of medications called hypomethylation agents. It works by helping the bone marrow produce normal blood cells and by killing abnormal cells in the bone marrow. Lymphodepleting chemotherapy, with fludarabine and cyclophosphamide, helps kill cancer cells in the body and helps prepare the body for the new CAR-T cells. Giving NEXI-001 with decitabine and lymphodepleting chemotherapy may be safe and tolerable in treating patients with relapsed or refractory AML or MDS following an allogeneic hematopoietic cell transplantation from a matched donor.

Detailed description: PRIMARY OBJECTIVES: I. Characterize the safety of allogeneic CD8+ leukemia-associated antigens specific T cells NEXI-001 (NEXI-001) combined with decitabine. II. Determine the recommended phase 2 dose (RP2D) for NEXI-001 T cells combined with decitabine. SECONDARY OBJECTIVES: I. Investigate the preliminary anti-leukemic activity of NEXI-001 T cells combined with decitabine based on: Ia. Complete response (CR) rate; Ib. Overall response rate (ORR); Ic. Median duration of response; Id. 1-year overall survival (OS); Ie. 1-year progression-free survival (PFS). II. Cumulative incidence of acute graft-versus-host disease (aGVHD) of grades 2-4 and 3-4 at day 100 post first infusion of NEXI-001. III. Cumulative incidence of chronic graft-versus-host disease (cGVHD) of all grades at 1 year post first infusion of NEXI-001. IV. Characterize the T cells in the NEXI-001 product by immunophenotype and tumor antigen specificity. V. Characterize NEXI-001 T cells in peripheral blood (PB) and bone marrow (BM) by immunophenotype and tumor antigen specificity. VI. Expansion and persistence of NEXI-001 T cells in PB and BM. EXPLORATORY OBJECTIVES: I. Evaluate the effect of the following factors on the safety and efficacy of NEXI-001 T cells combined with decitabine: Ia. NEXI-001 T-cell immunophenotype; Ib. Persistence of NEXI-001 T cells in PB and BM; Ic. Blood levels of the antigen-specific NEXI-001 T cells; Id. Biomarkers of activation, proliferation, and exhaustion of T cells; Ie. The expression of tumor associated antigen (TAAs) and checkpoint molecules on AML blasts. OUTLINE: This is a dose-escalation study of decitabine in combination with NEXI-001, fludarabine and cyclophosphamide. DONOR: Donors undergo leukapheresis on study. PATIENTS: Patients may receive bridging therapy per standard of care ≥ 14 days prior to the start of cycle 1. Patients receive decitabine intravenously (IV) over 1 hour once per day (QD) on day -3, -5 or -10 to day -1, lymphodepletion chemotherapy with fludarabine IV over 30 minutes QD and cyclophosphamide IV over 60 minutes QD on day -5 to -3 and then receive NEXI-001 IV over 30 minutes QD on days 1, 8 and 15 of cycle 1. Cycles repeat every 33 or 38 days in the absence of disease progression or unacceptable toxicity. If NEXI-001 cells remain and treatment criteria are met, patients may receive and additional cycle of decitabine IV over 1 hour QD on day -5 to -1 and NEXI-001 IV QD on days 1, 8 and 15 in the absence of disease progression or unacceptable toxicity. Patients undergo echocardiography (ECHO) during screening, bone marrow aspirate and/or bone marrow biopsy, positron emission tomography (PET)/computed tomography (CT) scan or magnetic resonance imaging (MRI) and blood sample collection throughout the study. After completion of study treatment, patients are followed up within 30 days and every 3 months for up to 1 year.

Criteria for eligibility:
Criteria:
Inclusion Criteria: - PARTICIPANT: Documented informed consent of the participant and/or legally authorized representative and documented informed consent of the donor - PARTICIPANT: Agreement to allow the use of archival tissue from diagnostic tumor biopsies (if unavailable, exceptions may be granted with study principal investigator [PI] approval) - PARTICIPANT: Age: ≥ 18 years - PARTICIPANT: Eastern Cooperative Oncology Group (ECOG) ≤ 1 or Karnofsky performance score (KPS) ≥ 70 - PARTICIPANT: Confirmed diagnosis of AML/MDS that has relapsed after or is refractory to an allogeneic hematopoietic cell transplantation (HCT) from a matched donor. - Refractory - failure to achieve a complete response minimal residual disease (CRMRD) (-) by multicolor flow cytometry (MFC) or reverse transcription polymerase chain reaction (RT qPCR) - Relapse - detection of clonal abnormal myeloid blasts by morphology (morphologic relapse) or by MFC, or RT-qPCR analysis (MRD[+] relapse) after achieving a CRMRD(-) induced by an allogeneic HCT or maintained by allogeneic HCT administered as consolidation therapy. Note: Patients who meet the protocol definition of relapse/refractory (r/r) AML/MDS at screening and subsequently achieve a CRMRD(-) response status following protocol-specified bridging therapy will remain eligible to continue participation in this study - PARTICIPANT: At least 100 days post allogeneic HCT - PARTICIPANT: Donor match at 8 out of 8 loci for human leucocyte antigen (HLA) -A, -B, -C, and -DRB1 (each typed at high resolution by deoxyribonucleic acid [DNA]-based methods) - PARTICIPANT: Expression of HLA-A*0201 as determined by high resolution sequence-based typing methods - PARTICIPANT: Total bilirubin ≤ 1.5 X upper limit of normal (ULN) (unless has Gilbert's disease) (to be performed within 28 days of consenting) - PARTICIPANT: Aspartate aminotransferase (AST) ≤ 2.5 x ULN (to be performed within 28 days of consenting) - PARTICIPANT: Alanine aminotransferase (ALT) ≤ 2.5 x ULN (to be performed within 28 days of consenting) - PARTICIPANT: Serum creatinine < 1.5 mg/dL or creatinine clearance of ≥ 60 mL/min per 24 hour urine test or the Cockcroft-Gault formula (to be performed within 28 days of consenting) - PARTICIPANT: Left ventricular ejection fraction (LVEF) ≥ 50% Note: To be performed before the first dose of lymphodepletion chemotherapy - PARTICIPANT: If able to perform pulmonary function tests: Forced expiratory volume in one second (FEV1), forced vital capacity (FVC), and diffuse lung capacity for carbon monoxide (DLCO) (diffusion capacity) ≥ 50% of predicted (corrected for hemoglobin) (to be performed within 28 days of consenting) - PARTICIPANT: If unable to perform pulmonary function tests: Oxygen (O2) saturation > 92% on room air (to be performed within 28 days of consenting) - PARTICIPANT: Seronegative for HIV antigen/antibody (Ag/Ab) combo, hepatitis C virus (HCV), active hepatitis B virus (HBV) (surface antigen negative), and syphilis (rapid plasma reagin [RPR]) (to be performed within 28 days of consenting) - If positive, hepatitis C ribonucleic acid (RNA) quantitation must be performed. OR - If seropositive for HIV, HCV or HBV, nucleic acid quantitation must be performed. Viral load must be undetectable - PARTICIPANT: Women of childbearing potential (WOCBP): Negative urine or serum pregnancy test. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required (to be performed within 28 days of consenting) - PARTICIPANT: Agreement by females and males of childbearing potential to use an effective method of birth control or abstain from heterosexual activity for the course of the study through at least 3 months after the completion of the last cycle of protocol therapy. - Childbearing potential defined as not being surgically sterilized (men and women) or have not been free from menses for > 1 year (women only) - DONOR: The identified donor must be the donor whose stem cells were used for the research participant's allo HCT - DONOR: The donor's hematocrit value is ≥ 35% - DONOR: The donor's platelet count is > 100,000 per microliter - CRITERIA TO PROCEED TO START OF CYCLE 1: NEXI-001 product is released from manufacturing with a certificate of analysis (COA) - CRITERIA TO PROCEED TO START OF CYCLE 1: Bone marrow aspirate and bone marrow biopsy within one week prior to treatment for baseline disease status (all disease statuses are eligible to proceed) and correlative studies - CRITERIA TO PROCEED TO START OF CYCLE 1: T-cell chimerism ≥ 50% to donor by polymerase chain reaction (PCR) analysis - CRITERIA TO PROCEED TO START OF CYCLE 1: Fully recovered to ≤ grade 1 from non-hematologic acute toxic effects (except alopecia) from prior anti-cancer therapy - CRITERIA TO PROCEED TO START OF CYCLE 1: Total bilirubin ≤ 1.5 X ULN (unless has Gilbert's disease) (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: AST =< 2.5 x ULN (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: ALT =< 2.5 x ULN (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: Serum creatinine < 1.5 mg/dL or creatinine clearance of ≥ 60 mL/min per 24 hour urine test or the Cockcroft-Gault formula (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: If not receiving anticoagulants: International normalized ratio (INR) OR prothrombin (PT) ≤ 1.5 x ULN. If on anticoagulant therapy: PT must be within therapeutic range of intended use of anticoagulants (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: If not receiving anticoagulants: Activated partial thromboplastin Time (aPTT) ≤ 1.5 x ULN. If on anticoagulant therapy: aPTT must be within therapeutic range of intended use of anticoagulants (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: Left ventricular ejection fraction (LVEF) ≥ 50% (to be performed within 2 days prior to start of cycle therapy) - Note: To be performed before the first dose of LD chemotherapy - CRITERIA TO PROCEED TO START OF CYCLE 1: Corrected QT (QTc) ≤ 480 ms (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: O2 saturation > 92% on room air (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: Women of childbearing potential (WOCBP): Negative urine or serum pregnancy test. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required (to be performed within 2 days prior to start of cycle therapy) - CRITERIA TO PROCEED TO START OF CYCLE 1: Investigational drugs or devices within 30 days prior to start of cycle 1 therapy - NEXI-001 INCLUSION CRITERIA: Total bilirubin ≤ 2.5 X ULN (unless has Gilbert's disease) (to be performed within 1 days prior to NEXI-001 infusion) - NEXI-001 INCLUSION CRITERIA: AST =< 3 x ULN (to be performed within 1 days prior to NEXI-001 infusion) - NEXI-001 INCLUSION CRITERIA: Serum creatinine < 2 mg/dL (to be performed within 1 days prior to NEXI-001 infusion) - NEXI-001 INCLUSION CRITERIA: O2 saturation > 92% on room air (to be performed within 1 days prior to NEXI-001 infusion) - CRITERIA TO PROCEED TO CYCLE 2: Patient has achieved a response of at least stable disease - CRITERIA TO PROCEED TO CYCLE 2: ANC must be at least 1,000/uL and platelets at least 50,000/uL to begin decitabine - CRITERIA TO PROCEED TO CYCLE 2: Patient has not experienced a ≥ grade 3 NEXI-001-related nonhematological AE that did not resolve to ≤ grade 2 within 72 hours Exclusion Criteria: - PARTICIPANT: Patients who have had 2 prior allogeneic (allo) HCTs - PARTICIPANT: Patients who have received more than 3 anti-leukemic treatments regimens since their allo HCT - PARTICIPANT: Vaccination with a live virus within six months prior to study treatment. - Inactivated influenza vaccination is allowed - PARTICIPANT: Active acute or chronic GVHD - PARTICIPANT: Known hypersensitivity to any component of the NEXI-001 T-cell product or fludarabine, cyclophosphamide, decitabine, or tocilizumab - PARTICIPANT: Clinically significant uncontrolled illness - PARTICIPANT: A second primary malignancy that has not been in remission for > 2 years. Exceptions include the following resected lesions: - Non-melanoma skin cancer. - Carcinoma in situ. - Squamous intraepithelial lesions on Pap smear. - Localized prostate cancer (Gleason score < 6). - Melanoma in situ - PARTICIPANT: Females only: Pregnant or breastfeeding - PARTICIPANT: Clinically significant cardiovascular disease: - Myocardial infarction or unstable angina within 6 months prior to the start of lymphodepleting (LD) chemotherapy. - Cerebral vascular accident or a transient ischemic attack within 6 months prior to the start of LD chemotherapy. - Clinically significant cardiac arrhythmia - Uncontrolled hypertension - Congestive heart failure (New York Heart Association Class III or IV) - Pericarditis or clinically significant pericardial effusion - Myocarditis - PARTICIPANT: History of autoimmune disease resulting in end organ injury or requiring systemic immunosuppression or systemic disease modifying therapy within 2 years prior to enrollment. - Patients with a history of autoimmune-related hypothyroidism on a stable dose of thyroid replacement hormone remain eligible. - Patients with controlled type 1 diabetes mellitus on a stable insulin regimen remain eligible - PARTICIPANT: Major trauma or major surgery within 4 weeks of enrollment - PARTICIPANT: Dementia or altered mental status that precludes understanding the informed consent form - PARTICIPANT: History of seizures or other chronic clinically significant neurologic disorders. - Patients with well-controlled seizures on anti-seizure medication without a seizure episode for ≥ 6 months remain eligible - PARTICIPANT: Any other condition that would, in the Investigator's judgment, contraindicate the patient's participation in the clinical study due to safety concerns with clinical study procedures - PARTICIPANT: Prospective participants who, in the opinion of the investigator, may not be able to comply with all study procedures (including compliance issues related to feasibility/logistics) - DONOR: The donor is pregnant or breastfeeding at the time of requested donation - DONOR: The donor had granulocyte colony stimulating factor (G-CSF) administered within one month, prior to leukapheresis - DONOR: The donor has an active bacterial or fungal infection, which is currently not responding to antimicrobial treatment - CRITERIA TO PROCEED TO START OF CYCLE 1: Other anti-leukemic (bridging) therapies within 14 days of start of cycle 1 therapy - CRITERIA TO PROCEED TO START OF CYCLE 1: Patients receiving systemic corticosteroid (> 20 mg/day prednisone equivalent) or any other immunosuppressant agents at the time of initiation of LD chemotherapy. Intermittent topical, inhaled, or intranasal corticosteroids are allowed - CRITERIA TO PROCEED TO START OF CYCLE 1: Active acute or chronic GVHD (Note: must have resolved by the time of initiation of cycle 1 of therapy - CRITERIA TO PROCEED TO START OF CYCLE 1: Active or uncontrolled infection requiring antibiotics by the time LD chemotherapy is scheduled. Prophylactic and ongoing therapy for prior controlled infection is allowed - CRITERIA TO PROCEED TO START OF CYCLE 1: Females only: Pregnant or breastfeeding - CRITERIA TO PROCEED TO START OF CYCLE 1: Clinically significant cardiovascular disease: - Myocardial infarction or unstable angina within 6 months prior to the start of LD chemotherapy - Cerebral vascular accident or a transient ischemic attack within 6 months prior to the start of LD chemotherapy - Clinically significant cardiac arrhythmia - Uncontrolled hypertension - Congestive heart failure (New York Heart Association Class III or IV) - Pericarditis or clinically significant pericardial effusion - Myocarditis - History of seizures or other chronic clinically significant neurologic disorders. Patients with well-controlled seizures on anti-seizure medication without a seizure episode for ≥ 6 months remain eligible - CRITERIA TO PROCEED TO START OF CYCLE 1: Any other condition that would, in the Investigator's judgment, contraindicate the patient's participation in the clinical study due to safety concerns with clinical study procedures - NEXI-001 EXCLUSION CRITERIA: Patient has no evidence of NEXI-001-related nonhematological adverse events (AEs), e.g. cytokine release syndrome (CRS), immune effector cell-associated neurotoxicity syndrome (ICANS), hemophagocytic lymphohistiocytosis (HLH)/macrophage activation syndrome (MAS) - NEXI-001 EXCLUSION CRITERIA: Patient has not developed any of the exclusion criteria for treatment - CRITERIA TO PROCEED TO CYCLE 2: Patient has not developed any of the exclusion criteria for treatment

Gender: All

Minimum age: 18 Years

Maximum age: N/A

Healthy volunteers: Accepts Healthy Volunteers

Locations:

Facility:
Name: City of Hope Medical Center

Address:
City: Duarte
Zip: 91010
Country: United States

Contact:
Last name: Monzr M. Al Malki

Phone: 626-218-2405
Email: malmalki@coh.org

Contact backup:
Last name: Monzr M. Al Malki

Start date: December 7, 2024

Completion date: December 12, 2026

Lead sponsor:
Agency: City of Hope Medical Center
Agency class: Other

Collaborator:
Agency: National Cancer Institute (NCI)
Agency class: NIH

Source: City of Hope Medical Center

Record processing date: ClinicalTrials.gov processed this data on November 12, 2024

Source: ClinicalTrials.gov page: https://clinicaltrials.gov/ct2/show/NCT06572631

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