NCT07223021

A Study of Fludarabine Dosing in Children and Young Adults With B-cell Acute Lymphoblastic Leukemia

Improving EveNt Free Survival by Optimizing FLUdarabine Exposure During LymphodepletioN for CAR T CEll Therapy: a Randomized, Multi-center Study of Children and Young Adults With B-cell Acute Lymphoblastic Leukemia (INFLUENCE)

• Status: Recruiting
• Phase: Phase 3
• Study type: Interventional
• Enrollment: 130 (estimated)
• Sponsor: Memorial Sloan Kettering Cancer Center · Academic / Other
• Sex: All
• Age: 1 Year
• Healthy volunteers: Not accepted

Summary

The researchers are doing this study to find out whether PK-targeted fludarabine is an effective Lymphodepletion (LD) chemotherapy approach for people with relapsed/refractory B-cell acute lymphoblastic leukemia (B-ALL) who will receive tisagenlecleucel CAR T-cell therapy. The researchers will compare PK-targeted fludarabine dosing with standard fludarabine dosing to see which treatment approach is more effective. The researchers will also look at whether PK-targeted fludarabine dosing is feasible (practical), the side effects of the study treatment, and how the study treatment affects people's quality of life. The researchers will measure quality of life by having participants complete questionnaires.

Conditions

• B-cell Acute Lymphoblastic Leukemia

Interventions

Type	Name	Description
DRUG	Fludarabine	Fludarabine 30 mg/m2/dose x 4 doses on days -6 to -3 (or -7 to -4)
DRUG	Cyclophosphamide	All patients will receive Cyclophosphamide 500 mg/m2 IV on days -6 and -5 (or -7 and -6).
DRUG	Fludarabine	Targeted fludarabine LD: Fludarabine 40 mg/m2/dose x 2 doses on days -6 and -5 (or -7 and -6), with doses on days -4 and -3 (or -5 and -4, if starting lymphodepletion on day -7) adjusted based on PK analysis to target a cumulative area under the curve (AUC) of 18 mg\*h/L (range 17.5-18.5mg\*h/L)
BIOLOGICAL	CAR-T	will be infused based on institutional guidelines.

Timeline

• Start date: 2025-10-20
• Primary completion: 2028-10-01
• Completion: 2028-10-01
• First posted: 2025-10-31
• Last updated: 2026-03-30

Locations

3 sites across 1 country: United States

Regulatory

• FDA-regulated drug study