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Genetically Engineered Cells (EGFRt/19-28z/IL-12 CAR T Cells) for the Treatment of Relapsed or Refractory CD19+ Hematologic Malignancies

A Phase I Trial of CD19-Targeted Chimeric Antigen Receptor (CAR) Modified T Cells Genetically Engineered to Secrete Interleukin 12 (IL-12) and With a Truncated Human Epidermal Growth Factor Receptor (EGFRt) in Patients With Relapsed or Refractory CD19+ Hematologic Malignancies

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06343376
Enrollment
1
Registered
2024-04-02
Start date
2024-11-26
Completion date
2025-01-03
Last updated
2025-08-03

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

Conditions

Recurrent Chronic Lymphocytic Leukemia, Recurrent Diffuse Large B-Cell Lymphoma, Recurrent Follicular Lymphoma, Recurrent High Grade B-Cell Lymphoma, Recurrent Mantle Cell Lymphoma, Recurrent Transformed Chronic Lymphocytic Leukemia, Recurrent Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma, Refractory Chronic Lymphocytic Leukemia, Refractory Diffuse Large B-Cell Lymphoma, Refractory Follicular Lymphoma, Refractory High Grade B-Cell Lymphoma, Refractory Mantle Cell Lymphoma, Refractory Transformed Chronic Lymphocytic Leukemia, Refractory Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma

Brief summary

This phase I trial tests the safety, side effects, and best dose of genetically engineered cells called EGFRt/19-28z/IL-12 CAR T cells, and to see how they work in treating patients with hematologic malignancies that makes a protein called CD19 (CD19-positive) that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). Chimeric Antigen Receptor (CAR) T-cell Therapy is a type of treatment 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. To improve the effectiveness of the modified T cells and to help the immune system fight cancer cells better, the modified T cells given in this study will include a gene that makes the T cells produce a cytokine (a molecule involved in signaling within the immune system) called interleukin-12 (IL-12). The researchers think that IL-12 may improve the effectiveness of the modified T cells, and it may also strengthen the immune system to fight cancer. Giving EGFRt/19-28z/IL-12 CAR T cells may be safe and tolerable in treating patients with relapsed or refractory CD19+ hematologic malignancies.

Detailed description

PRIMARY OBJECTIVE: I. To determine the safety, toxicity and maximum tolerated dose (MTD) of EGFRt/19-28z/IL-12 CAR T-lymphocytes (EGFRt/19-28z/IL-12 CAR T cells) in patients with relapsed or refractory CD19+ aggressive hematologic malignancies. SECONDARY OBJECTIVES: I. To assess the anti-tumor efficacy of adoptively transferred EGFRt/19-28z/IL-12 T cells. II. To assess the in vivo persistence of adoptively transferred EGFRt/19-28z/IL-12 T cells. EXPLORATORY OBJECTIVES: I. To describe the cellular and cytokine microenvironment following infusion of adoptively transferred EGFRt/19-28z/IL-12 T cells. II. To characterize endogenous anti-tumor immune responses following infusion of adoptively transferred EGFRt/19-28z/IL-12 T cells. III. To summarize levels of normal B cells and the incidence of B cell aplasia following infusion of adoptively transferred EGFRt/19-28z/IL-12 T cells. IV. To determine the proportion of evaluable patients who achieve minimal residual disease (MRD)-negativity in peripheral blood and/or bone marrow. V. To assess phenotype and in vitro function of end-of-production (EOP) EGFRt/19-28z/IL-12 CAR T cells and phenotype at recovery following CAR T cell administration. OUTLINE: This is a dose-escalation study of EGFRt/19- 28z/IL-12 CAR T cells. Patients are assigned to 1 of 2 cohorts. COHORT A: Patients undergo leukapheresis prior to treatment. Patients receive EGFRt/19- 28z/IL-12 CAR T cells intravenously (IV) over 5 to 30 minutes on day 0. Patients also undergo echocardiography (ECHO) or multigated acquisition scan (MUGA) during screening. Patients also undergo computed tomography (CT) or positron emission tomography (PET) as well as bone marrow biopsy and aspiration and blood sample collection throughout the trial. Additionally, patients undergo a tissue biopsy during screening and on the trial. COHORT B: Patients undergo leukapheresis prior to treatment and receive lymphodepletion chemotherapy with cyclophosphamide IV over 2 hours and fludarabine IV over 30 minutes on days -5, -4, and -3. Patients then receive EGFRt/19- 28z/IL-12 CAR T cells IV over 5 to 30 minutes on day 0. Patients also undergo ECHO or MUGA during screening. Patients also undergo CT or PET as well as bone marrow biopsy and aspiration and blood sample collection throughout the trial. Additionally, patients undergo a tissue biopsy during screening and on the trial. After completion of study treatment, patients are followed up weekly for 4 weeks, every 4 weeks until 24 months, every 3 months thereafter for 1 year, then annually for up to 5 years, followed by long-term follow up for up to 15 years.

Interventions

PROCEDUREPositron Emission Tomography

Undergo PET

PROCEDUREBiopsy

Undergo tissue biopsy

PROCEDUREBiospecimen Collection

Undergo blood sample collection

PROCEDUREBone Marrow Aspiration

Undergo bone marrow biopsy and aspiration

PROCEDUREBone Marrow Biopsy

Undergo bone marrow biopsy and aspiration

PROCEDUREComputed Tomography

Undergo CT

DRUGCyclophosphamide

Given IV

PROCEDUREEchocardiography

Undergo ECHO

BIOLOGICALEGFRt/19-28z/IL-12 CAR T-lymphocytes

Given IV

DRUGFludarabine Phosphate

Given IV

PROCEDURELeukapheresis

Undergo leukapheresis

PROCEDUREMultigated Acquisition Scan

Undergo MUGA

Sponsors

Roswell Park Cancer Institute
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Patients with relapsed refractory B Cell malignancies which commonly express CD-19. * Eligible disease subtypes include the following: * Patients with diffuse large B-cell lymphoma (de novo or diffuse large B-cell lymphoma \[DLBCL\] transformed from an indolent lymphoma (follicular lymphoma, chronic lymphocytic leukemia) or high grade B-cell Lymphoma (HGBL): * Relapsed or refractory DLBCL or high-grade B-cell lymphoma (HGBL) following 2 or more prior chemoimmunotherapy regimens containing an anthracycline and CD20-directed therapy following diagnosis of de novo DLBCL/HGBL or DLBCL arising from indolent lymphoma and requiring further treatment. * Relapse following a single prior chemoimmunotherapy regimen containing an anthracycline and CD20-directed therapy following diagnosis of de novo DLBCL/HGBL or DLBCL arising from indolent lymphoma and considered ineligible for high dose chemotherapy and autologous stem cell rescue as determined by the investigator. * Patients must have at least one fludeoxyglucose F-18 (FDG)-avid (PET-avid) measurable lesion. * Biopsy confirmation of relapsed or refractory DLBCL is required. * Chronic lymphocytic leukemia after 2 lines of therapy including a BTKi (bruton tyrosine kinase inhibitor). * Mantle cell lymphoma after 2 lines of therapy. Patients must have previously received chemoimmunotherapy and a prior BTK inhibitor. * Follicular lymphoma after 2 lines of therapy. * For cohort 1A specifically, patients must additionally have received a prior CD19-targeted CAR T-cell therapy or not have an indication for a Food and Drug Administration (FDA)-approved commercial CD19-targeted CAR T-cell therapy. This will include patients with relapsed/refractory DLBCL, FL, CLL and MCL. * For cohorts other than cohort 1A (and if needed, cohort -1), patients with an indication for an FDA approved commercial CD19-targeted CAR T-cell therapy are eligible following an informed consent discussion that reviews the risks and benefits of the FDA-approved commercial CD19-targeted CAR T-cell therapy vs the investigational product. * Prior CD19-targeted therapies, including CAR T-cell therapy, does not exclude participation; however, CD19 expression by immunohistochemical staining or flow cytometry must be confirmed prior to enrollment for patients who have received such therapies. * Age ≥ 18 years of age. * Creatinine Clearance \> 30 mL/min (Cockroft-Gault equation). * Direct bilirubin ≤ 2.0 mg/dL (unless related to disease). * Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3 x upper limit of normal (ULN) (unless related to disease). * Adequate pulmonary function as assessed by ≥ 90% oxygen saturation on room air by pulse oximetry. * Have an Eastern Cooperative Oncology Group (ECOG) performance status 0-1. * 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. 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. Patients of childbearing age should use effective contraception while on this study and continue for 1 year after all treatment is finished. * 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.

Exclusion criteria

* Pregnant or lactating patients. * Impaired cardiac function (left ventricular ejection fraction \[LVEF\] \< 40%) as assessed by ECHO or MUGA scan during screening. * Patients with active graft versus host disease following allogeneic hematopoietic cell transplantation requiring systemic T cell suppressive therapy are ineligible. * Patients with active autoimmune disease requiring systemic T cell suppressive therapy are ineligible. * Patients with following cardiac conditions will be excluded: * New York Heart Association (NYHA) stage III or IV congestive heart failure. * Myocardial infarction ≤ 6 months prior to enrollment. * Any history of clinically significant ventricular arrhythmia or unexplained syncope, not believed to be vasovagal in nature or due to dehydration. * Patients with HIV are ineligible. * Patients with active hepatitis B infection (as manifest by either detectable hepatitis B virus deoxyribonucleic acid \[DNA\] by polymerase chain reaction \[PCR\] and/or positivity for hepatitis B surface antigen) are ineligible. * Patients with active hepatitis C infection (as manifest by detectable hepatitis C virus ribonucleic acid \[RNA\] by PCR) are ineligible. Patients with detectable antibodies to hepatitis C virus will be screened by PCR for evidence of active infection. * Patients with uncontrolled systemic fungal, bacterial, viral or other infection are ineligible. * Patients with any concurrent active malignancies as defined by malignancies requiring any therapy other than expectant observation or hormonal therapy, with the exception of squamous and basal cell carcinoma of skin. * Patients with history or presence of clinically significant neurological disorders such as epilepsy, generalized seizure disorder, severe brain injuries are ineligible. * Patients with primary central nervous system (CNS) disease are ineligible. * Unwilling or unable to follow protocol requirements. * Any other condition/issue which, in the opinion of the treating physician, would make the patient ineligible for the study.

Design outcomes

Primary

MeasureTime frameDescription
Incidence of adverse eventsUp to 5 yearsWill be graded on a scale of 1 to 5 as described by the National Cancer Institute's Common Terminology Criteria for Adverse Events version 5.0 (NCI CTCAE v 5.0).
Maximal tolerated dose (MTD) of EGFRt/19-28z/IL-12 chimeric antigen receptor T-cellsWithin 30 days from the final infusion of the EGFRt/19-28z/IL-12 T cellsWill be defined as the highest dose with an observed incidence of dose limiting toxicities in no more than one out of six patients treated at a particular dose level. Will be assessed using NCI CTCAE v 5.0.

Secondary

MeasureTime frameDescription
Event free survivalUp to 5 yearsWill be computed using the Kaplan- Meier method.
Overall survivalUp to 5 yearsWill be computed using the Kaplan- Meier method.
Incidence of complete remission (CR)/complete remission with incomplete count recovery (CRi)Within 3 months of CAR T-cell infusion
Modified T-cell persistenceUp to 5 yearsWill be determined by the presence of detectable CAR T-cells (quantitative polymerase chain reaction or multiparameter flow cytometry).
Progression-free survivalUp to 5 years
Incidence of CR/CRi + partial response (PR) (ORR)Within 3 months of CAR T-cell infusion

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026