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Phase I/II Study of Enhanced CD33 CAR T Cells in Subjects With Relapsed or Refractory Acute Myeloid Leukemia

NCT04835519 · Status: COMPLETED · Phase: PHASE1/PHASE2 · Type: INTERVENTIONAL · Enrollment: 5

Last updated 2024-06-21

No results posted yet for this study

Summary

This is a open-label, nonramdominzed, single-arm, Phase I/II Study to evaluate safety and tolerability of functionally enhanced CD33 CAR-T cells in subjects with relapsed or refractory acute myeloid leukemia. 25 subjects will be enrolled. Subjects will be pretreated with chemotherapy prior to infusion of CAR T cells: about 5 days before cells transfusion, the patients who planned to reinfuse CAR T cells were treated with fluorodarabine 30 mg/m\^2( body surface area) and cyclophosphamide 250 mg/m\^2( body surface area) for 3 days. Then the Bayesian optimal interval phase I/II (Boin12) trial design will be used in this study: The protocol preset 2 dose levels: Dose 1 (DL-1) was 5×10\^5 (±20%) CAR T cells/kg, and dose 2 (DL-2) was 1×10\^6 (±20%) CAR T cells/kg. Phase I was the dose exploration phase. After determining the optimal biological dose (OBD), phase II will be expanded at the OBD dose by 10 cases, enrollment will reach 25 cases, and the trial will be discontinued. Moreover, the first 3 enrolled subjects per dose group will be on one by one dosing regimen.

The expected initial dose of 5×10\^5 (±20%) CAR T cells/kg could not be achieved due to preparation problems and should be placed in the reduced dose group. The number of cells will be collected by the above regimen as far as possible. If this is not possible, subjects can still enter the study upon investigator consideration but require documentation of dosing. The lowest dose is 1×10\^5 CAR T cells/kg (±20%), and the highest dose is 1×10\^6 CAR T cells/kg (±20%). If the dose is out of the range mentioned above, entry into the trial will not be considered.

Conditions

Interventions

BIOLOGICAL

chimeric antigen receptor T cell

Subjects will be pretreated with chemotherapy prior to infusion of CAR T cells: about 5 days before cells transfusion, the patients who planned to reinfuse CAR T cells were treated with fluorodarabine 30 mg/m\^2( body surface area) and cyclophosphamide 250 mg/m\^2( body surface area) for 3 days. Then this study will be using the Bayesian optimal interval phase I/II (Boin12) trial design. The protocol preset 2 dose levels: Dose 1 (DL-1) was 5×10\^5 (±20%) CAR T cells/kg, and dose 2 (DL-2) was 1×10\^6 (±20%) CAR T cells/kg. If the above dose cannot be met, subjects can still enter the study upon investigator consideration but require documentation of dosing. The lowest dose is 1×10\^5 CAR T cells/kg (±20%), and the highest dose is 1×10\^6 CAR T cells/kg (±20%). If the dose is out of the range mentioned above, entry into the trial will not be considered.

Sponsors & Collaborators

  • Beijing Boren Hospital

    lead OTHER

Principal Investigators

  • Jing Pan, MD/PhD · Beijing Boren Hospital

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
1 Year
Max Age
70 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2021-04-08
Primary Completion
2023-05-19
Completion
2023-05-19

Countries

  • China

Study Locations

More Related Trials

Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04835519 on ClinicalTrials.gov