Tegavivint for the Treatment of Relapsed or Refractory Leukemia

PRIMARY OBJECTIVES: I. To determine the maximum tolerated dose (MTD) and dose limiting toxicities (DLT) of tegavivint in patients with relapsed and refractory acute myeloid leukemia (AML). (Phase I dose escalation) II. To determine the maximum tolerated dose (MTD) and dose limiting toxicities (DLT) of tegavivint combined with decitabine in patients with relapsed and refractory acute myeloid leukemia (AML). (Combination cohort) SECONDARY OBJECTIVES: I. To assess the safety profile of tegavivint as characterized by adverse event (AE) type, severity, timing and relationship to study drug, as well as laboratory abnormalities in the first and subsequent treatment cycles. (Phase I dose escalation) II. To explore the efficacy (complete remission \[CR\], complete remission without blood count recovery \[CRi\], or partial remission \[PR\], of tegavivint as a single-agent in patients with relapsed/refractory (R/R) AML. (Phase I dose escalation) III. To assess overall survival (OS), and disease-free survival (DFS) in patients with R/R AML treated with tegavivint. (Phase I dose escalation) IV. To assess the duration of disease control defined as first date of disease control identified (either CR/CRi, PR or SD) until the date of progression. (Phase I dose escalation) V. To explore biomarkers of response and resistance in patients with R/R AML treated with tegavivint. (Phase I dose escalation) VI. To assess the safety profile of tegavivint in combination with decitabine as characterized by adverse event (AE) type, severity, timing and relationship to study drug, as well as laboratory abnormalities in the first and subsequent treatment cycles. (Combination cohort) VII. To explore the efficacy (complete response \[CR\], complete response without blood count recovery \[CRi\], or partial response \[PR\], of tegavivint in combination with decitabine in patients with R/R AML. (Combination cohort) VIII. To assess overall survival (OS), and disease free survival (DFS) in patients with R/R AML treated with tegavivint + decitabine. (Combination cohort) IX. To assess the duration of disease control defined as first date of disease control identified (either CR/ CRi, PR or SD) until the date of progression. (Combination cohort) X. To explore biomarkers of response and resistance in patients with R/R AML treated with tegavivint + decitabine. (Combination cohort) OUTLINE: This is a dose-escalation study. PART I: Patients receive tegavivint intravenously (IV) over 4 hours on days 1, 8, 15, and 22. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. PART II: Patients receive tegavivint IV over 4 hours on days 1, 8, 15, and 22 and decitabine IV over 30-60 minutes on days 1-5. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days.