KRT-232 Versus Best Available Therapy for the Treatment of Subjects With Myelofibrosis Who Are Relapsed or Refractory to JAK Inhibitor Treatment

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Trial ID: NCT03662126

Purpose

This study evaluates KRT-232, a novel oral small molecule inhibitor of MDM2, for the treatment of patients with myelofibrosis (MF) who no longer benefit from treatment with a JAK inhibitor. Inhibition of MDM2 is a novel mechanism of action in MF. This study will be conducted in 2 phases. Phase 2 will determine the KRT-232 recommended dose and dosing schedule; Phase 3 will test KRT-232 vs Best Available Therapy (BAT). Patients in the Phase 3 part of the study will be randomized 2:1 to receive either KRT-232 (Arm 1) or BAT (Arm 2). The BAT administered will be determined by the treating physician, with the option to "cross-over" to KRT-232 treatment after 6 months of BAT or if the disease worsens at any time.

Official Title

A Phase 2/3 Randomized, Controlled, Open-Label Study of KRT 232 in Subjects With Primary Myelofibrosis (PMF), Post Polycythemia Vera MF (Post-PV-MF), Or Post Essential Thrombocythemia MF (Post-ET-MF) Who Are Relapsed or Refractory to Janus Kinase (JAK) Inhibitor Treatment

Eligibility


Inclusion Criteria:

   - Confirmed diagnosis of PMF, post-PV MF or post-ET MF (WHO)

   - High, intermediate-2, or intermediate-1 risk Dynamic International Prognostic System
   (DIPSS)

   - Failure of prior treatment with JAK inhibitor

   - ECOG ≤ 2

Exclusion Criteria:

   - Prior splenectomy

   - Splenic irradiation within 3 months prior to randomization

   - History of major hemorrhage or intracranial hemorrhage within 6 months prior to
   randomization

   - History of stroke, reversible ischemic neurological defect or transient ischemic
   attack within 6 months prior to randomization

   - Prior MDM2 inhibitor therapy or p53-directed therapy

   - Prior allogeneic stem-cell transplant or plans for allogeneic stem cell transplant

   - History of major organ transplant

   - Grade 2 or higher QTc prolongation (> 480 milliseconds per NCI-CTCAE criteria, version
   5.0)

Intervention(s):

drug: KRT-232

drug: Best Available Therapy (BAT)

Recruiting

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Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305
Justin Abuel
6507231367

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