Highest Dose of Uproleselan in Combination with Fludarabine and Cytarabine for Patients with Acute Myeloid Leukemia, Myelodysplastic Syndrome, or Mixed Phenotype Acute Leukemia Relapsed or Refractory and that Expresses E-selectin Ligand on the Cell Membrane

Summary

Objectives

PRIMARY OBJECTIVES:
I. To estimate the maximum tolerated dose or recommended Phase 2 dose of uproleselan (GMI-1271) administered in combination with fludarabine and cytarabine to patients with acute myeloid leukemia (AML), myelodysplastic syndrome (MDS) or mixed phenotype acute leukemia (MPAL) whose blasts express the E-selectin ligand and that are in second or greater relapse or refractory to relapse therapy.
II. To characterize the pharmacokinetics and pharmacodynamics of uproleselan (GMI-1271) in combination with fludarabine and cytarabine in patients with refractory and/or relapsed AML, MDS or MPAL.
III. To define and describe the toxicities of uproleselan (GMI-1271) in combination with fludarabine and cytarabine among patients with relapsed and/or refractory AML, MDS or MPAL.

SECONDARY OBJECTIVES:
I. To describe the expression of E-selectin ligand on the surface of myeloid leukemic blasts at relapse prior to initiation of uproleselan (GMI-1271) in combination with fludarabine and cytarabine and at completion of the cycle.
II. To describe the antileukemic activity of uproleselan (GMI-1271) (complete remission [CR]/CR with partial recover of platelet count [CRp]/CR with incomplete blood count recovery [CRi] and rates of minimal residual disease (MRD) negative response after up to two cycles of therapy) in combination with fludarabine and cytarabine within the limits of a Phase 1 study.

EXPLORATORY OBJECTIVE:
I. To determine the largest relative reduction in myeloid leukemic blast percentage in the bone marrow, calculated from baseline at time of enrollment to up to two cycles of therapy.

OUTLINE: This is a dose escalation study of uproleselan.

Patients receive uproleselan intravenously (IV) once daily (QD) over 20 minutes on day 1 and IV over 20 minutes twice daily (BID) on days 2-8, fludarabine IV QD over 30 minutes on days 2-6, and high dose cytarabine IV QD over 1-3 hours on days 2-6. Patients also receive cytarabine intrathecal therapy (IT) or intrathecal triple therapy (ITT) on day 0. CNS2 and CNS3 patients receive additional cytarabine IT or ITT once weekly starting on day 7-28. Treatment repeats every 28 days for up to 2 cycles in the absence of disease progression or unacceptable toxicity. Patients (with down syndrome only) receive leucovorin orally (PO) or IV BID on days 1, 8, 15, 22, and 29.