Bioavailability and Bioequivalence Study of Ziftomenib in Participants With Relapsed/Refractory AML or MDS

November 5, 2026 updated by: Kura Oncology, Inc.

Relative Bioavailability and Bioequivalence Study of Ziftomenib Drug Products in Participants With Relapsed/Refractory AML With NPM1 Mutation, or With Relapsed/Refractory AML or MDS With Mutations Associated With MEIS1 Overexpression

This study will evaluate the pharmacokinetics (PK) of ziftomenib drug products to inform relative bioavailability (rBA) and bioequivalence (BE) assessments.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

The purpose of this study is to measure rBA or BE of various ziftomenib drug products in participants with R/R NPM1-m AML, or with R/R AML or MDS with a mutation associated with MEIS1 overexpression.

Study details include:

  • The study is composed of two parts.
  • Participant study duration will be a minimum of approximately 4 months including screening, 2 cycles of treatment, and safety follow-up.
  • The visit frequency will be weekly in Part 1.
  • The required treatment duration will be approximately 2 cycles of treatment (56 days) in Part 1 with the option for participants deriving clinical benefit to continue treatment in Part 2.
  • The visit frequency will be monthly in Part 2.

Study Type

Interventional

Enrollment (Estimated)

126

Phase

  • Phase 1

Expanded Access

Available outside the clinical trial. See expanded access record.

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Age ≥18 years.
  2. Relapsed/refractory NPM1-mutated AML, or relapsed/refractory AML or MDS with a mutation associated with MEIS1 overexpression; disease confirmed in blood and/or bone marrow, as applicable, and not a candidate for currently approved standard-of-care regimens or hematopoietic stem cell transplantation (HSCT).
  3. Female participants must not be pregnant or breastfeeding.
  4. Male participants with partners of childbearing potential must agree to abstinence or highly effective contraception and refrain from sperm donation during treatment and for at least 90 days after the last dose.
  5. Signed informed consent.
  6. Eastern Cooperative Oncology Group (ECOG) performance status ≤2 and life expectancy ≥2 months.
  7. Adequate organ function: estimated glomerular filtration rate ≥30 mL/min/1.73 m²; bilirubin ≤1.5 × the upper limit of normal (ULN), unless attributable to Gilbert's syndrome or leukemic disease; and AST and ALT ≤3 × ULN.
  8. Peripheral white blood cell count ≤25,000/µL before Day 1 of Part 1; hydroxyurea or cytarabine may be used to control the count.

Exclusion Criteria:

  1. Clinically active central nervous system (CNS) leukemia; participants with controlled CNS leukemia receiving intrathecal therapy at study entry may be eligible.
  2. Grade ≥2 acute graft-versus-host disease (GVHD), moderate/severe limited chronic GVHD, or extensive chronic GVHD.
  3. Active HIV, hepatitis C, or hepatitis B infection, as defined in the protocol; participants with controlled disease are not excluded.
  4. Active, uncontrolled systemic fungal, bacterial, viral, or other infection.
  5. Significant cardiovascular disease, including unstable angina, uncontrolled hypertension or arrhythmia, qualifying heart failure, ischemic or severe valvular heart disease, or stroke, transient ischemic attack, or myocardial infarction within the preceding 6 months.
  6. Mean QT interval corrected using Fridericia's formula (QTcF) >480 ms on triplicate electrocardiograms obtained within 5 minutes of each other.

The full inclusion and exclusion criteria, including applicable definitions are presented in the study protocol.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Cohort A

Sequential administration of oral formulations (Part 1) followed by optional treatment continuation (Part 2)
Drug: Ziftomenib

Oral Formulation 1

Drug: Ziftomenib

Oral Formulation 2

Drug: Ziftomenib

Oral Formulation 3

Drug: Ziftomenib

Oral Formulation 4
Experimental: Cohort B

Sequential administration of oral formulations (Part 1) followed by optional treatment continuation (Part 2)
Drug: Ziftomenib

Oral Formulation 1

Drug: Ziftomenib

Oral Formulation 2

Drug: Ziftomenib

Oral Formulation 3

Drug: Ziftomenib

Oral Formulation 4
Experimental: Cohort C

Sequential administration of oral formulations (Part 1) followed by optional treatment continuation (Part 2)
Drug: Ziftomenib

Oral Formulation 1

Drug: Ziftomenib

Oral Formulation 2

Drug: Ziftomenib

Oral Formulation 3

Drug: Ziftomenib

Oral Formulation 4

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohorts A, B and C)
Time Frame: During the first 56 days of ziftomenib

Maximum plasma concentration at steady state (Cmax,ss)
During the first 56 days of ziftomenib
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohorts A and B)
Time Frame: During the first 56 days of ziftomenib

Plasma concentration observed at end of dosing interval at steady state (Cτ)
During the first 56 days of ziftomenib
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohorts A, B and C)
Time Frame: During the first 56 days of ziftomenib

Area under the concentration-time curve from time 0 to dosing interval at steady state (AUC0-τ,ss)
During the first 56 days of ziftomenib
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohorts A and B)
Time Frame: During the first 56 days of ziftomenib

Time to Cmax,ss (Tmax,ss)
During the first 56 days of ziftomenib
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohorts A and B)
Time Frame: During the first 56 days of ziftomenib

Cavg,ss
During the first 56 days of ziftomenib

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohort C)
Time Frame: During the first 56 days of ziftomenib

Cτ
During the first 56 days of ziftomenib
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohort C)
Time Frame: During the first 56 days of ziftomenib

Tmax,ss
During the first 56 days of ziftomenib
To determine the plasma PK parameters of ziftomenib following oral (PO) administration (Part 1: Cohort C)
Time Frame: During the first 56 days of ziftomenib

Cavg,ss
During the first 56 days of ziftomenib
To assess safety and tolerability of ziftomenib (Parts 1 and 2)
Time Frame: Day 1 of study intervention through 28 days after the last dose
  1. Incidence and severity of AEs per National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI CTCAE) V6.0
  2. Incidence of SAEs
Day 1 of study intervention through 28 days after the last dose
To assess discontinuation of study treatment due to Adverse Events (Parts 1 and 2)
Time Frame: Day 1 of study intervention through 28 days after the last dose

Discontinuation of study treatment due to AEs
Day 1 of study intervention through 28 days after the last dose
To assess deaths while receiving treatment (Parts 1 and 2)
Time Frame: Day 1 of study intervention through 28 days after the last dose

Deaths on treatment
Day 1 of study intervention through 28 days after the last dose

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Kura Oncology, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

October 30, 2026

Primary Completion (Estimated)

February 28, 2029

Study Completion (Estimated)

February 28, 2029

Study Registration Dates

First Submitted

October 21, 2026

First Submitted That Met QC Criteria

November 5, 2026

First Posted (Actual)

November 10, 2026

Study Record Updates

Last Update Posted (Actual)

November 10, 2026

Last Update Submitted That Met QC Criteria

November 5, 2026

Last Verified

October 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KO-MEN-018
  • 2025 (U.S. NIH Grant/Contract)
  • 2025-524332-19-00 (Ctis)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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