A Phase II Study With a Safety Run-In of the Addition of N-803 to a Chemoimmunotherapy Backbone for the Treatment of Patients With Relapsed or Refractory Neuroblastoma

The study participant is being asked to take part in this research study because the participant has been diagnosed with neuroblastoma that did not fully respond to previous treatment (refractory), or it has returned after treatment (relapsed). Primary Aims * To evaluate if the administration of N-803 in combination with irinotecan, temozolomide, hu14-18K322A, and GM-CSF in patients with relapsed/refractory neuroblastoma is feasible and tolerable * To determine if the response rate of N-803 with irinotecan, temozolomide, hu14.18K322A and GM-CSF in patients with relapsed/refractory neuroblastoma is superior to the combination of irinotecan, temozolomide, hu14.18K322A, and GM-CSF Secondary Aims * To describe the toxicity profile of N-803 administered with irinotecan, temozolomide, hu14.18K322A and GM-CSF * To evaluate and compare the progression free survival (PFS) and overall survival (OS) of and between patients receiving irinotecan, temozolomide, hu14.18K322A and GM-CSF with and without N-803

NCT Number	NCT07085338
Lead Sponsor	St. Jude Children's Research Hospital
Conditions	Neuroblastoma Recurrent
Enrollment	54 participants
Start Date	2025-11-10
Primary Completion	2028-02-01 (estimated)
Study Completion	2029-02-01 (estimated)
Updated on ClinicalTrials.gov	2026-08-07