Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 5:39 PM
Ignite Modification Date:
2025-12-24 @ 5:39 PM
NCT ID:
NCT03984968
Brief Summary:
This is a single-arm, open-label, single-center, phase I/II study to determine the safety and efficacy of CD19 CAR-T(ssCART-19) combined with autologous T cells engineered to express CD19, namely CD19+ feeding T cells (FTCs), as consolidation therapy in patients diagnosed with de novo Philadelphia chromosome-positive CD19+ B-ALL.
The study will contain the following sequential phases: screening, lymphocyte apheresis, induction, and consolidation chemotherapies combined with tyrosine kinase inhibitors. Once in complete response, patients will receive two to four cycles of ssCART-19s, namely one cycle of ssCART-19 infusion (CAR-T1) followed by one to three cycles of ssCART-19 and CD19+ FTC infusion (CAR-T2-4). The role of CD19+ FTCs is to mimic leukemia cells. Therefore, they are expected to stimulate in vivo expansion and persistence of ssCART-19.
Considering the limited number of lymphocytes obtained by a single apheresis from patients and cost-efficacy, in addition to safety, we will explore the range of biologically active doses of FTCs in a phase I study. Based on preclinical data, FTCs' stimulation of ssCART-19 at a ratio of 1:1 could achieve the best activation response, so a 5×10\^6/kg dosage of FTCs was set as the initial dosage in the study, and lower doses were also evaluated. In phase I, FTCs will be administered at the dose of 5×10\^6/kg, 3.25×10\^6/kg, or 2×10\^6/kg two hours after ssCART-19 infusion on day 1 and once again administered at the same dose on day 8. After ssCART-19 and FTCs infusion, adverse events (AEs) as the primary endpoints will be recorded for 6 months; efficacy as the secondary endpoint will be assessed by detecting molecular response for 6 months, PFS, and OS for 2 years.
In phase II, we will expand the study at optimal biological doses of FTCs and further evaluate the efficacy and safety of the innovative combination therapy of ssCART-19 and FTCs. The primary endpoint was the complete molecular response (CMR). The secondary endpoints were RFS, OS, and adverse events (AEs) of the patients.
Study:
NCT03984968
Study Brief:
Protocol Section:
NCT03984968