Pre- and post-transplant ponatinib for a patient with acute megakaryoblastic blast phase chronic myeloid leukemia with T315I mutation who underwent allogeneic hematopoietic stem cell transplantation.
Here, we demonstrate that JNJ-26854165, an inhibitor of MDM2, inhibits proliferation and triggers cell death in a p53-independent manner in various BCR/ABL-expressing cells, which include primary leukemic cells from patients with CML blast crisis and cells expressing the Imatinib-resistant T315I BCR/ABL mutant.
ARDAP derivative <b>10</b> inhibited the proliferation of BCR/ABL-expressing KU812 and LAMA84 cells from chronic myeloid leukemia (CML) patients in blast crisis and of hematopoietic cells ectopically expressing the imatinib mesylate (IM)-sensitive KBM5-WT or its IM-resistant KBM5-T315I mutation.
Adults with Ph+ chronic phase (CP)-, accelerated phase (AP)- or blast phase (BP)-CML, or ALL and documented BCR-ABL T315I mutation were treated with a 5-day continuous infusion of MK-0457 administered every 14 days at 40 mg/m(2)/h, 32 mg/m(2)/h or 24 mg/m(2)/h.
Ponatinib is approved for the treatment of adults with T315I-positive chronic-, accelerated- or blast-phase chronic myeloid leukaemia (CML), or Philadelphia chromosome-positive (Ph+) acute lymphoblastic leukaemia (ALL) [in the EU and the USA], as well as those with chronic-, accelerated- or blast-phase CML, or Ph+ ALL who are resistant or intolerant to prior tyrosine kinase inhibitor therapy (EU) or for whom no other tyrosine kinase inhibitor therapy is indicated (USA).
BMS-214662 was cytotoxic against CML blast crisis stem/progenitor cells, particularly in combination with a tyrosine kinase inhibitor and equally effective in cell lines harboring wild-type vs mutant BCR-ABL, including the T315I mutation.
P-loop and T315I mutations were particularly frequent in advanced-phase chronic myeloid leukemia and Ph+ ALL patients, and often accompanied progression from chronic phase to accelerated phase/blast crisis.