CAR T Cell Therapy for Recurrent or Refractory Acute Myeloid Leukemia
Official title: Phase I Study of Cellular Immunotherapy Using T Cells Lentivirally Transduced to Express a Cd33-Specific Chimeric Antigen Receptor for Patients With Cd33+ Relapsed/Refractory Acute Myeloid Leukemia
Run by City of Hope Medical Center · NCT05672147 · Data updated 2026-11-12
This study is testing a new CAR T-cell therapy to see if it can help people with recurring or hard-to-treat acute myeloid leukemia by using modified immune cells to attack cancer cells.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 27 (estimated) |
| Sponsor | City of Hope Medical Center Academic / other |
| Drugs / interventions | tocilizumab, cetuximab, chemotherapy, radiation, prednisone, CAR T, chimeric antigen receptor |
| Locations | 1 site (Duarte, California) |
| Status | Recruiting |
| Started | December 7, 2023 |
| Main results expected | September 3, 2031 |
| Study ends | September 3, 2031 |
| Registry record updated | November 9, 2026 |
| Trial ID | NCT05672147 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include adults aged 18 and older with a confirmed diagnosis of CD33+ recurrent or refractory acute myeloid leukemia.
✕Probably not a fit
Patients with non-CD33+ AML or those who have not had a prior response to CAR T-cell therapy may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This phase I trial evaluates the safety and effectiveness of anti-CD33 chimeric antigen receptor (CAR) T-cell therapy in patients with recurrent or refractory acute myeloid leukemia (AML). The study involves modifying T cells from patients or donors to target and attack cancer cells expressing the CD33 protein. Participants will undergo lymphodepletion therapy before receiving the CAR T-cell infusion, and the study will assess the expansion and persistence of these modified cells, as well as their impact on patient outcomes such as progression-free survival and overall survival.
Why it matters
Potential benefit: If successful, this therapy could provide a new treatment option for patients with difficult-to-treat acute myeloid leukemia.
How similar studies have gone: Other studies using CAR T-cell therapy for various cancers have shown promising results, indicating potential for success in this approach.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Documented informed consent of the participant and/or legally authorized representative * Assent, when appropriate, will be obtained per institutional guidelines * For research participants who do not speak English, a short form consent may be used with a City of Hope (COH) certified interpreter/translator to proceed with screening, while the request for a translated full consent is processed * Agreement to allow the use of archival tissue from diagnostic tumor biopsies * If unavailable, exceptions may be granted with Study principal investigator (PI) approval * Age: \>= 18 years * Karnofsky Performance Scale (KPS) \>= 70 * Life expectancy \>= 16 weeks at the time of enrollment * Prior allogeneic transplant allowed if \> 6 months prior to study enrollment * Participant must have a confirmed diagnosis of active CD33+ AML de novo, or secondary OR participants who are at a high risk for disease recurrence * Relapsed AML is defined as patients that had a first complete response (CR) before developing recurrent disease (increased bone marrow blasts) * Refractory AML is defined as patients that have not achieved a first CR after induction chemotherapy. For patients with AML evolving from myelodysplastic syndrome, they should have completed at least one cycle of induction chemotherapy * Research participants must have bone marrow and/or peripheral blood samples available for confirmation of diagnosis of AML * CD33 positivity must be confirmed by either flow cytometry or immunohistochemistry within 90 days of study entry. Cytogenetics, flow cytometry, and molecular studies (such as FLT-3 status) will be obtained as per standard practice * Research participants who are at a high risk of disease recurrence, they must have historical bone marrow and/or peripheral blood samples available for confirmation of diagnosis of AML * No known contraindications to lymphodepleting agents, steroids, tocilizumab and/or cetuximab, or the investigational agent * Total serum bilirubin =\< 2.0 mg/dL * Participants with Gilbert syndrome may be included if their total bilirubin is =\< 3.0 * Aspartate aminotransferase (AST) =\< 3 x the upper limit of normal (ULN) * Alanine aminotransferase (ALT) =\< 3 x ULN * Estimated creatinine clearance of \>= 60 mL/min per the Cockcroft-Gault formula, and the participant is not on hemodialysis * Left ventricular ejection fraction \>= 50% within 8 weeks before enrollment * Oxygen (O2) saturation \> 92% not requiring oxygen supplementation * 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 * 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 6 months after the last dose 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) * Research participants must have a potential donor or stem cell source identified for allogeneic transplantation, either related (7/8 or 8/8 allele matched or haploidentical) * DONOR: The identified donor must be the original donor whose stem cells were used for the research participant's allogeneic hematopoietic stem cell transplantation (alloSCT) * DONOR: The donor must be HIV negative * DONOR: KPS \>= 70 * DONOR: Documented body weight Exclusion Criteria: * Prior allogeneic transplant if \< 6 months prior to enrollment * Concurrent use of systemic steroids or chronic use of immunosuppressant medications should be stopped 28-days prior to enrollment. Recent or current use of inhaled or topical steroids in standard doses is not exclusionary. Physiologic replacement of steroids (prednisone =\< 7.5 mg/day, or equivalent doses of other corticosteroids) is allowed * Participants with active autoimmune disease, including graft versus host disease (GvHD), requiring systemic immune suppressive should be stopped 28-days prior to enrollment * Participants may not be receiving any other investigational agents and are not dependent on concurrent biological therapy, chemotherapy, or radiation therapy * With exception to Hydrea which must be stopped prior to initiation of lymphodepletion * Research participants on active systemic antifungal treatment within 8 weeks of enrollment are not eligible. However, participants on antifungal prophylaxis are eligible * Not applicable at the time of enrollment if the research participant's donor is undergoing leukapheresis * Subjects with \>= Grade 2 myelofibrosis on bone marrow biopsy * Subjects with clinically significant arrhythmia or arrhythmias not stable on medical management within two weeks of screening if the patient is undergoing leukapheresis. Patients with controlled atrial arrythmia is allowed * Known bleeding disorders (e.g., von Willebrand's disease) or hemophilia * History of stroke or intracranial hemorrhage within 6 months prior to screening * Subjects with presence of other active malignancy, however, research participants with history of prior malignancy treated with curative intent and in complete remission are eligible * Clinically significant uncontrolled illness * Active infection requiring antibiotics * Research participants who have tested human immunodeficiency virus (HIV) positive, or have active hepatitis B or C infection based on testing performed within 4 weeks of enrollment * Active viral hepatitis * Females only: Pregnant or breastfeeding * Any other condition that would, in the Investigator's judgment, contraindicate the subject's participation in the clinical study due to safety concerns with clinical study procedures * 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)
Where it's running
-
City of Hope Medical Center
Duarte, California, United States Recruiting
Study contacts
- Principal investigator: Karamjeet S Sandhu — City of Hope Medical Center
Similar studies
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CAR-T Therapy Safety, Response, and Immune-Escape: Observational Study in Adults
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.