New hope for tough leukemia: experimental drug targets genetic flaw
NCT ID NCT04067336
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests a new drug called ziftomenib (KO-539) in people with acute myeloid leukemia (AML) that has come back or not responded to treatment. The drug targets a specific genetic change (MLL rearrangement or NPM1 mutation) found in some patients. The goal is to find the safest dose and see if it can control the disease.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1/2
Runs two stages together: safety and dose first, then whether the treatment works.
- Participants
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About 263 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Sep 2019
- Expected to finish
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Oct 2028
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Key Inclusion Criteria: Patients with refractory or relapsed AML defined as the reappearance of ≥ 5% blasts in the bone marrow and who have also failed or are ineligible for any approved standard of care therapies, including HSCT. 1. Phase 1b: * Patients with a documented lysine\[K\]-specific methyltransferase 2-rearrangement (KMT2A-r), or * Patients with a documented nucleophosmin 1 mutation (NPM1-m) 2. Phase 2: * Patients with a documented nucleophosmin 1 mutation (NPM1-m) 3. Sub-studies: * Sub-studies 1 and 2: Patients with R/R AML with NPM1-m or other mutations associated with MEIS1 overexpression. * Sub-study 3: Patients with R/R Acute Lymphoblastic Leukemia (ALL) with KMT2A-r. * Sub-study 4: Patients with R/R AML with mutations associated with MEIS1 overexpression. 4. ≥ 18 years of age. 5. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2, and a life expectancy of at least 2 months. 6. Adequate liver and kidney function according to protocol requirements. 7. Peripheral white blood cell (WBC) counts ≤ 30,000/μL. Patients may receive hydroxyurea to control and maintain white blood cell count prior to enrollment. 8. Women of childbearing potential must be willing to use a highly effective method of contraception throughout the study and for at least 187 days after the last dose of study treatment. 9. Males with female partners of childbearing potential must agree to use a highly effective method of contraception throughout the study and for at least 97 days after the last dose of study treatment. Key Exclusion Criteria: 1. Diagnosis of acute promyelocytic leukemia. 2. Diagnosis of chronic myelogenous leukemia in blast crisis. 3. Donor lymphocyte infusion \< 30 days prior to study entry. 4. Clinically active central nervous system (CNS) leukemia. 5. Undergone HSCT and have not had adequate hematologic recovery. 6. Receiving immunosuppressive therapy post HSCT within 2 weeks of Cycle 1 Day 1. 7. Grade ≥ 2 active graft-versus-host disease (GVHD), moderate or severe limited chronic GVHD, or extensive chronic GVHD of any severity. 8. Received chemotherapy immunotherapy, radiotherapy, or any ancillary therapy that is considered to be investigational (i.e., used for non-approved indications(s) and in the context of a research investigation) \< 14 days prior to the first dose of ziftomenib or within 5 drug half-lives prior to the first dose of study drug. 9. Not recovered to \< Grade 2 (National Cancer Institute Common Terminology Criteria for Adverse Events v5.0) from all acute toxicities or deemed back to a stable baseline. 10. Treatment with concomitant drugs that are strong inhibitors or inducers of cytochrome P450-isozyme 3A4 (CYP3A4), as follows: * Phase 1a, 1b, 2, and sub-studies 3 and 4: with the exception of antibiotics, antifungals, and antivirals that are used as standard of care or to prevent or treat infections and other such drugs that are considered absolutely essential for the care of the patient. * Sub-studies 1 and 2: No exceptions will be allowed except for the use of moderate CYP3A4 antifungal prophylaxis such as fluconazole or isavuconazole which is at steady state on Cycle 1 Day 1 and will continue through the completion of PKs on Cycle 1 Day 15 (for sub-study 1) or Cycle 1 Day 18 (for sub-study 2). 11. Detectable viral load for human immunodeficiency virus, hepatitis C, or hepatitis B surface antigen indicative of active infection. Patients with controlled disease will not be excluded from study enrollment. 12. Pre-existing disorder predisposing the patient to a serious or life-threatening infection (e.g. cystic fibrosis, congenital or acquired immunodeficiency, bleeding disorder, or cytopenias not related to AML). 13. Active uncontrolled acute or chronic systemic fungal, bacterial, viral, or other infection. 14. Significant cardiovascular disease including unstable angina pectoris, uncontrolled hypertension or arrhythmia, history of cerebrovascular accident including transient ischemic attack within the past 6 months, congestive heart failure (NYHA Class III or IV) related to primary cardiac disease, ischemic or severe valvular heart disease, or a myocardial infarction within 6 months prior to the first dose of study treatment. 15. Mean QTcF \>480 ms on triplicate ECG. 16. Major surgery within 4 weeks prior to the first dose of study treatment. 17. Women who are pregnant or lactating. All female patients with reproductive potential must have a negative serum pregnancy test within 72 hours prior to starting treatment. 18. For sub-studies 1 and 2: Any intake of grapefruit, grapefruit juice, Seville oranges, Seville orange marmalade, or other products containing grapefruit or Seville oranges within 7 days of the first administration of ziftomenib until the end of Cycle 1. 19. For sub-studies 1 and 2: Moderate (Child-Pugh class B) or severe (Child-Pugh class C) hepatic impairment.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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AZ Delta - Campus Rumbeke
Roeselare, 8800, Belgium
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Banner MD Anderson Cancer Center
Gilbert, Arizona, 85234, United States
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Centre Hospitalier Lyon Sud
Pierre-Bénite, 69310, France
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Centre Hospitalier Universitaire de Lille
Lille, 59037, France
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Centre Hospitalier Universitaire de Nantes
Nantes, 44093, France
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Duke Cancer Institute
Durham, North Carolina, 27710, United States
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Fred Hutchinson Cancer Research Center
Seattle, Washington, 98109, United States
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Hackensack University Medical Center - John Theurer Cancer Center
Hackensack, New Jersey, 07601, United States
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Harold C. Simmons Comprehensive Cancer Center - UT Southwestern Medical Center
Dallas, Texas, 75390, United States
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Hopital Maisonneuve-Rosemont
Montreal, Quebec, H1T 2M4, Canada
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Hopital Saint Louis
Paris, 75475, France
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Hopital de l'Enfant-Jesus - Centre Integre en Cancerologie du CHU de Quebec - Universite Laval
Québec, Quebec, G1J 1Z4, Canada
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Hospital Universitari Vall d'Hebron
Barcelona, 08035, Spain
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Hospital Universitari i Politecnic La Fe
Valencia, 46026, Spain
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Hospital Universitario Central de Asturias
Oviedo, 33011, Spain
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Hospital Universitario HM Sanchinarro
Madrid, 28050, Spain
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Hospital Universitario Virgen del Rocio
Seville, 41013, Spain
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IRCCS Istituto Romagnolo per lo Studio dei Tumori "Dino Amadori"
Meldola, 47014, Italy
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Institut Gustave Roussy
Villejuif, 94800, France
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Institute of Hematology and Medical Oncology "L. and A. Seragnoli"
Bologna, 40138, Italy
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Institution Fondazione Policlinico Tor Vergata
Roma, Italy
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Karmanos Cancer Institute
Detroit, Michigan, 48201, United States
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MD Anderson Cancer Center
Houston, Texas, 77030, United States
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MD Anderson Cancer Center
Madrid, 28033, Spain
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Magendie Hopital Haut-Leveque
Pessac, 33600, France
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Massachusetts General Hospital
Boston, Massachusetts, 02114, United States
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Mayo Clinic
Jacksonville, Florida, 32224, United States
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Mayo Clinic
Rochester, Minnesota, 55905, United States
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Medizinische Hochsschule Hannover
Hanover, 30625, Germany
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Oklahoma University Health - Stephenson Cancer Center
Oklahoma City, Oklahoma, 73117, United States
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Queen Elizabeth II Health Sciences Centre
Halifax, Nova Scotia, B3H 1V7, Canada
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Robert H. Lurie Comprehensive Cancer Center of Northwestern University
Chicago, Illinois, 60611, United States
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Roswell Park Comprehensive Cancer Center
Buffalo, New York, 14203, United States
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The Mount Sinai Hospital
New York, New York, 10029, United States
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UCLA Ronald Reagan Medical Center
Los Angeles, California, 90095, United States
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UO Ematologia Ospedale di Ravenna
Ravenna, 48121, Italy
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UPMC Hillman Cancer Center
Pittsburgh, Pennsylvania, 15232, United States
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Universitat de Barcelona
Barcelona, 08035, Spain
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University Medicine Greifswald
Greifswald, 17475, Germany
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University of Maryland Greenebaum Comprehensive Cancer Center
Baltimore, Maryland, 21201, United States
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University of Michigan Hospitals
Ann Arbor, Michigan, 48109, United States
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Vanderbilt-Ingram Cancer Center
Nashville, Tennessee, 37232, United States
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Weill Cornell Medical College - NY Presbyterian Hospital
New York, New York, 10021, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Can an experimental pill block a cancer-driving enzyme in hard-to-treat leukemia?
- Engineered immune cells aim to wipe out stubborn leukemia
- Two-Drug combo targets leukemia that outsmarted its first treatment
- Tweaking donor cells may shield older transplant patients from a dangerous complication
- Can a drug and donor cells stop leukemia from returning after transplant?