Clinical trial NCT06316856: CD5 Chimeric Antigen Receptor (CAR) T Cells in Subjects with Relapsed or Refractory T-cell Malignancies
Official title: CD5 Chimeric Antigen Receptors (CAR) T Cells in Subjects with Relapsed or Refractory T-Cell Malignancies: a Multi-center, Open-label, Non-randomized, Phase 1/2 Clinical Trial
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: PHASE1
PHASE2
Conditions: T-Cell Acute Lymphocytic Leukemia
Acute Lymphoblastic Leukemia, in Relapse
Refractory Acute Lymphoblastic Leukemia
T-cell Malignancies
Lead sponsor: Beijing GoBroad Hospital
Sponsor class: OTHER
Collaborators: name: The General Hospital of Western Theater Command
name: Zhaxin Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai
name: Shanghai Liquan Hospital
First posted: 2024-03-19
Enrollment: 54
Sex: ALL
Minimum age (years): 1
Maximum age (years): 70
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: This is a multi-center, open-label, non-randomized, phase 1/2 study of anti-CD5 CAR-T cell therapy in patients with CD5+ relapsed or refractory T-cell malignancies. A bayesian optimal interval (BOIN) 12 design will be used to explore the optimal biological dose (OBD) from starting dose level 1: 1×10\^6 (±20%) to dose level 2: 2×10\^6 (±20%) in three cohorts (autologous, previous-transplant-donor or newly matched donor-derived CD5 CAR T cells). If the manufactured cells are not sufficient to meet the preassigned standard dose criteria, patients will be given infusion at a low dose level of 5×10\^5 (±20%) /kg. The primary objective is to evaluate the safety and tolerability of CD5 CAR T cell therapy in subjects, determine the OBD and recommend phase 2 dose (RP2D) in phase 1, and evaluate the efficacy of CD5 CAR T cell therapy in phase 2. The primary endpoint is the type and incidence of dose-limiting toxicity (DLT) within 28 days, and the incidence and severity of adverse events (AEs) within 30 days after CD5 CAR T-cell infusion in phase 1, the best overall response (BOR) at 3 months (± 1 week) after CD5 CAR T-cell infusion in phase 2. A total number of 54 subjects will be enrolled.


Eligibility criteria: Inclusion Criteria:

Only patients who meet all the following criteria can be included:

1. Candidates with relapse or refractory CD5+ T-cell malignancies, who have progressed after treatment with all standard therapies or been intolerant of standard care, have limited prognosis with currently available therapies and have no available curative treatment options (such as stem-cell transplantation (SCT) or chemotherapy);
2. For subjects who received autologous CD5 CAR T cells, the tumor burden in peripheral blood is less than 20%, and suspending anti-neoplastic treatment for more than 2 weeks;
3. Aged 1-70 years;
4. No severe allergy;
5. Eastern Cooperative Oncology Group (ECOG) performance status 1 score 0 to 2;
6. Patients are expected to live for at least 60 days;
7. CD5+ on blasts in bone marrow (BM) or cerebrospinal fluid (CSF) and tumor tissues by flow cytometry and immunohistochemistry, respectively. (Positive rate \>80% by flow cytometry with less than one log difference in mean fluorescence intensity from normal T cells, or positive rate \>30% positive by immunohistochemistry);
8. Provide a signed informed consent before any screening procedure. Subjects who voluntarily participate in the study should have the ability to understand and sign the informed consent form and be willing to follow the study visit schedule and relevant study procedure, as specified in the protocol. Candidates aged 19-70 years need to be sufficiently conscious and able to sign the treatment consent form and voluntary consent form. Children candidates of 8-18 years old need to be sufficiently conscious and able to sign the treatment consent form and voluntary consent form and their legal guardian or patient advocate has also need to sign the treatment consent form and voluntary consent form, respectively. Children candidates of 1-7 can be recruited after the legal guardian or patient advocate has signed the treatment consent form and voluntary consent form;
9. Have available allogeneic hematopoietic stem cell transplantation donor for the subject who received newly matched donor-derived CD5 CAR T cells, and is willing to perform SCT when CR is achieved.

Exclusion Criteria:

Patients with at least one of the following conditions are excluded:

1. Impaired consciousness or intracranial hypertension;
2. Symptomatic congestive heart failure or severe cardiac arrhythmia;
3. Manifestations of severe respiratory system failure;
4. Co-existence with other malignancies;
5. Disseminated intravascular coagulation;
6. Serum creatinine and/or blood urea nitrogen (BUN) ≥ 1.5-fold upper limit;
7. Sepsis or other uncontrollable infections;
8. Uncontrollable diabetes;
9. Serious mental illness;
10. Apparent and active intracranial lesions on cranial magnetic resonance imaging (MRI);
11. Underwent organ transplantation, excepting SCT;
12. Pregnant females;
13. Positive test for infectious hepatitis, acquired immune deficiency syndrome (AIDS) or syphilis;
14. Post-CAR SCT is not feasible in patients who plan to receive newly matched donor-derived CD5 CAR T cells;
15. Inability to collect peripheral blood mononuclear cells (PBMC) or no frozen PBMC available for CAR T cell manufacturing.

Primary outcomes:
measure: Phase 1-The incidence and type of dose-limiting toxicity (DLT)
timeFrame: 28 days after CD5 CAR T cell infusion
measure: Phase 1-The incidence and severity of adverse events (AEs)
timeFrame: 30 days after CD5 CAR T cell infusion
measure: Phase 2-Antitumor effect
timeFrame: 3 months (± 1 week) after CD5 CAR T infusion
Secondary outcomes:
measure: Phase 1-Objective response rate (ORR)
timeFrame: 30 days after CD5 CAR T cell infusion
measure: Phase 1-Pharmacokinetics of CD5 CAR T cells
timeFrame: Up to 2 years after CD5 CAR T cell infusion
measure: Phase 1-The incidence and severity of adverse events (AEs).
timeFrame: From 30 days to 2 years after CD5 CAR T cell infusion
measure: Phase 1-Best overall response (BOR) rate.
timeFrame: 3 months (± 1 week) after CD5 CAR T cell infusion
measure: Phase 2-Objective response rate (ORR)
timeFrame: 1 months and 3 months after CD5 CAR T cell infusion
measure: Phase 2- The incidence and severity of AEs
timeFrame: Up to 2 years
measure: Phase 2- Progression free survival (PFS)
timeFrame: Up to 2 years
measure: Phase 2- Overall survival (OS).
timeFrame: Up to 2 years
Other outcomes:
Locations:
city: Beijing
country: China
facility: Beijing GoBroad Hospital
state: Beijing
city: Shanghai
country: China
facility: Zhaxin Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai
state: Shanghai
city: Shanghai
country: China
facility: Shanghai Liquan Hospital
state: Shanghai
city: Chengdu
country: China
facility: The General Hospital of Western Theater Command PLA
state: Sichuan
Study officials:
References: