This is a single-center pilot study of 20 patients with AML/MDS. Eligible patients will be
enrolled following an informed consent between 6-12 weeks after allogeneic hematopoietic stem
cell transplant. Patients will receive weekly oral ONC 201 for a total of 52 weeks.
The objectives of the study are: 1. To determine the safety and preliminary efficacy of ONC
201 maintenance therapy among patients with acute myeloid leukemia (AML) and myelodysplastic
syndrome (MDS), who undergo allogeneic hematopoietic stem cell transplant. 2. To investigate
the impact of ONC 201 on reconstitution of NK and other immune cells.
Patients will be monitored for toxicities (using Common Terminology Criteria for Adverse
Events, CTCAE version 5.0), quality of life (Functional Assessment of Cancer Therapy-Bone
Marrow Transplant, FACT-BMT), and immunologic changes. We will specifically investigate the
impact of ONC 201 on reconstitution of NK and other immune cells. We will also examine
changes in functional status (Karnofsky Performance Scale, KPS, instrumental activities of
daily living and short physical performance battery), rates of disease relapse and mortality.
1. A history of AML or MDS. The patients should have either complex karyotype with ≥3
changes, transplant being performed in second remission or beyond, AML with high-risk
mutations (TP53, RUNX1, or ASXL1 mutations), AML with active disease or minimal
residual disease positivity before or after transplant, high-risk or very high-risk
MDS not responding to 4 cycles of hypomethylating agents, or MDS progressing following
2. Receipt of allogeneic hematopoietic stem cell transplant 6-12 weeks prior to
3. Disease status: <5% bone marrow blast at the time of enrollment
4. All donor sources and conditioning regimens are allowed
5. Adults, Age ≥19 years (for the state of Nebraska)
6. Eastern Cooperative Oncology Group performance status of 0-2.
7. Absolute neutrophil count (ANC) greater than 1500/µL, and platelet count ³100,000/µL
without the use of growth factors or platelet transfusion in the past 2 weeks.
8. Able to take oral medication.
9. Female patient of reproductive potential must have a negative serum or urine pregnancy
test ≤7 days prior to starting the study drug.
10. Male and female patients of reproductive potential must be willing to avoid pregnancy
or fathering children from enrollment to two months after the end of study treatment.
This will require either a total abstinence, OR exclusively non-heterosexual activity
(when this is in line with the preferred and usual lifestyle of the subject), OR two
methods of contraception
11. Written informed consent to participate in the study.
1. A history of acute graft-versus-host disease grade III/IV or initiation of any new
immunosuppressive agent within 4 weeks prior to enrollment.
2. Use of prednisone at a dose of ≥0.25 mg/kg/day (or equivalent dose of another
glucocorticoid) at the time of enrollment
3. Active uncontrolled bacterial, fungal, parasitic, or viral infection. Infections are
considered controlled if appropriate therapy has been instituted and, at the time of
screening, no signs of infection progression are present. Progression of infection is
defined as hemodynamic instability attributable to sepsis, new symptoms, worsening
physical signs or radiographic findings attributable to infection. Persisting fever
without other signs or symptoms will not be interpreted as progressing infection
4. Presence of known HIV infection, active hepatitis B or C infection.
5. Total bilirubin, aspartate transaminase, alanine transaminase 2 ´ the upper limit of
the normal range. Patients with elevated bilirubin secondary to Gilbert syndrome will
not be excluded.
6. Creatinine clearance <30 mL/min
7. Presence of uncontrolled cardiopulmonary conditions such as ongoing cardiac
arrhythmias, unstable angina or myocardial infarction, New York Heart Association
class III/IV congestive heart failure, or severe chronic obstructive pulmonary disease
or other pulmonary condition resulting in a requirement of supplemental oxygen or
having a resting O2 saturation <90% by pulse oximetry
8. Pregnancy or breastfeeding.
9. Known hypersensitivity, or intolerance to any of the study medications, or excipients.
10. Treatment with any other investigational agent, device, or procedure, within 21 days
(or 5 half-lives, whichever is greater)
11. Patients on dopamine antagonists for treatment of psychotic disorder or Parkinson's
disease will be excluded. A brief use of drugs such as clozapine or haloperidol for a
few days for treatment of nausea or other indication will not be prohibited. The use
of tricyclic antidepressants does not constitute an exclusion criterion.
12. Any other condition that is judged by the physician to potentially interfere with
compliance to the study protocol or pose a significant risk to the patient.