Long-Term Follow-Up Results: A Phase 2 Trial Of Imatinib Mesylate As Maintenance Therapy For Patients With Newly Diagnosed C-Kit Positive Acute Myeloid Leukemia (Aml)

The c-kit (CD117) receptor is expressed on > 10% blasts in 64% of de novo AMLs and mediates proliferation and anti-apoptotic effects. High c-kit levels [defined as mean fluorescent intensity (MFI) > 20] correlate with a shorter time to relapse and decreased overall survival (OS). Imatinib mesylate (IM), a c-kit inhibitor, has activity against relapsed/ refractory AML. The primary objective of this study was to determine whether adding maintenance IM for 1 yr after completion of standard induction (IT) and post-remission therapy (PRT) in pts with newly diagnosed c-kit + AML improves progression-free survival (PFS) compared to historical controls. We previously presented our toxicity and correlative data at ASH 2012 (Abstract 3597). Here, we present our long term follow-up results.