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Acute Leukemia of Ambiguous Lineage in RelapsePhase 1NCT04898894

Study of Selinexor and Venetoclax in Combination With Chemotherapy in Pediatric and Young Adult Patients With Refractory or Relapsed Acute Myeloid Leukemia

A Phase 1 study testing Venetoclax, Selinexor and Cytarabine in people with Acute Leukemia of Ambiguous Lineage in Relapse and Acute Myeloid Leukemia, in Relapse, run by St. Jude Children's Research Hospital at 8 sites in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The purpose of this study is to test the safety and determine the best dose of venetoclax and selinexor when given with chemotherapy drugs in treating pediatric and young adult patients with acute myeloid leukemia (AML) or acute leukemia of ambiguous lineage (ALAL) that has come back (relapsed) or did not respond to… Read more about this study

Who is it for?
Ages 2 to 30 years
What is being tested?
Venetoclax, Selinexor and Cytarabine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
37 participants
Where
8 sitesUnited States
Study dates
15 Nov 2021to Sep 2027
Phase
Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 2 to 30 years
  • All sexes
  • No healthy volunteers
  • Child, Adult

Who may be able to join

  • Participants must have a diagnosis of AML or ALAL and meet the criteria below:
  • Refractory leukemia, defined as persistent leukemia after at least two courses of induction chemotherapy, OR
  • Early relapsed leukemia, defined as the re-appearance of leukemia after the achievement of remission and within one year of diagnosis, OR
  • Relapsed leukemia that is refractory to at least one course of salvage therapy (i.e., therapy given after the relapse has occurred), OR
  • Relapsed leukemia following HCT, OR
  • Second or greater relapse
Show all 20Show fewer
  • Patients with late first relapses, defined as the re-appearance of leukemia after the achievement of remission and greater than one year of diagnosis, may be enrolled in the dose expansion portion of the study after safety data from the dose escalation portion is available.
  • Patients must have ≥ 5% blasts in the bone marrow as assessed by morphology or flow cytometry. However, if flow cytometry cannot be performed or if an adequate bone marrow sample cannot be obtained (e.g., in a patient with acute megakaryoblastic leukemia with marrow fibrosis), patients may be enrolled if there is unequivocal evidence of leukemia with ≥ 5% blasts in the blood.
  • In addition, patients in all categories must not be eligible to undergo curative therapy, such as immediate HCT, because of disease burden, time to identify a stem cell donor, or other reasons.
  • Adequate organ function defined as the following:
  • Direct bilirubin ≤ 1.5 x institutional upper limit of normal (ULN)
  • Normal creatinine for age or a calculated creatinine clearance ≥ 30 mL/min/1.73m^2
  • Left ventricular ejection fraction ≥ 40% or shortening fraction ≥ 25%
  • Patients must be ≥ 2 years of age and ≤ 30 years old. The upper age limit may be defined by each institution but may not exceed 30 years. Patients treated at St. Jude Children's Research Hospital must be ≤ 24 years old.
  • Performance status: Lansky ≥ 50 for patients who are ≤ 16 years old and Karnofsky ≥ 50% for patients who are > 16 years old.
  • At least 14 days must have elapsed since the completion of myelosuppressive therapy or hypomethylating agents and the first doses of venetoclax and selinexor.
  • At least 24 hours must have elapsed since the completion of low-dose or non- myelosuppressive therapy, such as hydroxyurea, low-dose cytarabine (up to 100 mg/m^2/day), FLT3 inhibitor, or leukapheresis, and the first doses of venetoclax and selinexor.
  • For patients who have received prior HCT, there can be no evidence of GVHD and greater than 60 days must have elapsed since the HCT.
  • At least 14 days must have elapsed since the completion of any calcineurin inhibitors (e.g. tacrolimus, cyclosporine).
  • Patients may not receive strong or moderate CYP3A inducers, such as rifampin, within 3 days of the first dose of venetoclax or during the administration of venetoclax. During the dose-escalation portion of the trial, we discourage the use of strong CYP3A inhibitors (e.g., ketoconazole, itraconazole, voriconazole, posaconazole) within 3 days of the first dose of venetoclax or during the administration of venetoclax. However, if an azole is required for the treatment or prevention of fungal infection during any phase of the trial, venetoclax dosing will be reduced to 60 mg/m^2 (100 mg max) in patients who require treatment with voriconazole and reduced to 40 mg/m^2 (70 mg max) in patients who require posaconazole.

Who cannot join

  • Must not be pregnant or breastfeeding. Male or female of reproductive potential must agree to use effective contraception for the duration of study participation.
  • Patients with Down syndrome, acute promyelocytic leukemia, juvenile myelomonocytic leukemia, or bone marrow failure syndromes are not eligible.
  • Uncontrolled infection. Patients with infections that are controlled on concurrent anti-microbial agents are eligible.
  • Impairment of GI function or GI disease that, in the opinion of the treating physician, may significantly alter the absorption of venetoclax or selinexor.
  • History of cerebellar toxicity or cerebellar neurological findings on exam.
  • Previous toxicity or hypersensitivity directly attributed to venetoclax.

Trial locations and contacts

8 sites in 1 country.

8 sites in 1 country

United States8 sites

  • Dana-Farber Cancer Institute

    Boston, Massachusetts, 02215

  • UT Southwestern/Simmons Cancer Center

    Dallas, Texas, 75390

  • Cook Children's Medical Center

    Fort Worth, Texas, 76104

  • St. Jude Children's Research Hospital

    Memphis, Tennessee, 38105

  • Vanderbilt University Medical Center

    Nashville, Tennessee, 37232

  • Memorial Sloan-Kettering Cancer Center

    New York, New York, 10065

  • Childrens Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19104

  • Rady Children's Hospital-San Diego

    San Diego, California, 92123

Other trials in United States

About this study

Official title: A Phase I and Expansion Cohort Study of Selinexor and Venetoclax in Combination With Chemotherapy in Pediatric and Young Adult Patients With Refractory or Relapsed Acute Myeloid Leukemia

The purpose of this study is to test the safety and determine the best dose of venetoclax and selinexor when given with chemotherapy drugs in treating pediatric and young adult patients with acute myeloid leukemia (AML) or acute leukemia of ambiguous lineage (ALAL) that has come back (relapsed) or did not respond to treatment (refractory).

Primary Objective

Read more
  • To determine the safety and tolerability of selinexor and venetoclax in combination with chemotherapy in pediatric patients with relapsed or refractory AML or ALAL.

Secondary Objectives

  • Describe the rates of complete remission (CR) and complete remission with incomplete count recovery (CRi) for patients treated with selinexor and venetoclax in combination with chemotherapy at the recommended phase 2 dose (RP2D).
  • Describe the overall survival of patients treated at the RP2D.

Exploratory Objectives

  • Explore associations between leukemia cell genomics, BCL2 family member protein quantification, BH3 profiling, and response to therapy as assessed by minimal residual disease (MRD) and variant clearance using cell-free deoxyribonucleic acid (DNA) (cfDNA).
  • Describe the quality of life of pediatric patients undergoing treatment with selinexor and venetoclax in combination with chemotherapy and explore associations of clinical factors with patient-reported quality of life outcomes.
  • Describe the clinical and genetic features associated with exceptional response to the combination of venetoclax and selinexor without the addition of chemotherapy.
Read the detailed description

This study will include two phases. The dose-escalation phase will characterize the dose-limiting toxicity (DLT) and determine the recommended phase 2 dose (RP2D) of venetoclax plus selinexor with and without chemotherapy. Two expansion cohorts (cohort A, patients without prior exposure to venetoclax; cohort B, patients with prior exposure to venetoclax) will further assess the safety and will explore the efficacy at the RP2D.

Dosing of venetoclax and selinexor will be based on tolerability. Venetoclax will be given orally (po) once daily on days 1 through 21 and selinexor will be given orally (po) starting on days 1, 8, and 15 OR 1, 3, 8, 10, 15, and 17. Beginning on day 16, patients also receive fludarabine phosphate intravenously (IV) daily on days 16-20, cytarabine IV daily on days 16-20, and granulocyte colony-stimulating factor (G-CSF) subcutaneously (SC) daily on days 16-20. G-CSF may be omitted or extended at the discretion of the treating physician. Intrathecal (IT) chemotherapy will be given prior to cycle 1, but may be delayed if clinically indicated. IT cytarabine, IT methotrexate, and IT methotrexate/hydrocortisone/cytarabine (MHA) are all acceptable. Patients without evidence of central nervous system (CNS) leukemia will receive no further IT therapy during cycle 1. Patients with CNS disease will receive weekly IT therapy beginning on day 8, until the cerebrospinal fluid becomes free of leukemia.

Chemotherapy is scheduled to begin on Day 16; however, patients with exceptional responses may, at the discretion of the treating physician, receive chemotherapy (fludarabine and cytarabine) on days 16-20 and continue venetoclax through day 21 and selinexor through day 15 or 17 according to dose level. Alternatively, exceptional responders may continue venetoclax through day 28 and selinexor once or twice weekly according to dose level without chemotherapy and then undergo re-evaluation at day 29. For patients who do not receive chemotherapy on day 16-20, chemotherapy may be omitted completely or may be given on days 30-34 at the discretion of the treating physician.

Patients may receive up to 4 cycles of therapy in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for 30 days.

Being tested
Venetoclax, Selinexor, Cytarabine, Fludarabine, Filgrastim
Keywords
Acute Myeloid Leukemia, in Relapse, Refractory Acute Myeloid Leukemia, Acute Leukemia of Ambiguous Lineage in Relapse, Refractory Acute Leukemia of Ambiguous Lineage, Pediatric, Young Adult
Medical subject headings
Leukemia, Myeloid, Acute, Leukemia, Biphenotypic, Acute

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • VenetoclaxDrug

    Also called Venclextra®, ABT-199

    Given orally (PO)

  • SelinexorDrug

    Also called KPT-330

    Given Orally (PO)

  • CytarabineDrug

    Also called Cytosine arabinoside, Ara-C, Cytosar®

    Given in to the vein (IV) or intrathecal (IT)

  • FludarabineDrug

    Also called Fludara®, Fludarabine phosphate, 2-fluoro-ara-AMP

    Given in to the vein (IV) - Because of the ongoing nationwide shortage of fludarabine, this agent may be omitted during the dose expansion phase of the trial.

  • FilgrastimBiological

    Also called G-CSF

    Given subcutaneous (SubQ, SC)

  • MethotrexateDrug

    Also called MTX, amethopterin, Trexall®

    Given intrathecal (IT)

  • methotrexate/hydrocortisone/cytarabineDrug

    Also called ITMHA, Intrathecal triples

    Given intrathecal (IT)

Study groups in NCT04898894
Study groupRoleWhat they receive
TreatmentExperimentalDose Escalation Phase: Venetoclax plus selinexor will initially be given at dose level 1 in combination with intravenous (IV) cytarabine and fludarabine. Dosing of venetoclax and selinexor will be based on tolerability. Intrathecal (IT) chemotherapy (IT cytarabine, IT methotrexate, and IT methotrexate/hydrocortisone/cytarabine (MHA) are all acceptable) will be given. G-CSF SC may be given. Part 1 has been completed and RP2D has been determined to be Dose Level 2. All participants will be treated at Dose Level 2. Dose Expansion Phase: Two expansion cohorts will be treated at the recommended phase 2 dose (RP2D). Cohort A will include venetoclax-naïve patients, whereas Cohort B will include patients with prior exposure to venetoclax.
Receives: Drug: Venetoclax; Drug: Selinexor; Drug: Cytarabine; Drug: Fludarabine; Biological: Filgrastim; Drug: Methotrexate; Drug: methotrexate/hydrocortisone/cytarabine

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The recommended phase 2 dose (RP2D) of venetoclax plus selinexor plus chemotherapy.

    The primary endpoint is the recommended phase 2 dose (RP2D) of venetoclax plus selinexor plus chemotherapy.

    Measured: For each patient, the monitoring time period for dose-limiting toxicity will extend for 35 days from receipt of the first dose of protocol-directed selinexor or venetoclax.

  2. Number of patients treated

    A count of the number of patients treated at each dose level during the dose escalation phase will be provided

    Measured: 35 days from the receipt of the first dose of protocol-directed selinexor or venetoclax

  3. Number of patients who experience a Non-Hematologic dose limiting toxicity (DLT) during the dose escalation phase

    A count of the number of patients at each dose level who experience a Non-Hematologic DLT defined as any grade 3 or higher event that occurs within 35 days of the first dose and is at least possibly attributable to study drug administration (venetoclax, selinexor, fludarabine and/or cytarabine).

    Measured: Within 35 days of the first dose of chemotherapy

  4. Number of patients who experience a Hematologic DLT during the dose escalation phase

    A count of the number of patients at each dose level who experience a Hematologic DLT defined as failure to recover counts (ANC > 500/µl and platelet count > 25,000/µl) by day 43 from the start of chemotherapy unless the delay in count recovery is due to another identifiable factor.

    Measured: From the start of chemotherapy up to day 43

Secondary outcomes (6)

  1. The rates of complete remission (CR) for patients treated with selinexor and venetoclax in combination with chemotherapy at the RP2D.

    CR is defined as bone marrow with < 5% blasts confirmed by flow cytometry, ANC ≥ 500/μL and platelets ≥ 50,000/μL without transfusions, and no evidence of extramedullary disease.

    Measured: The final response of each patient will be determined no later than day 42 from the start of chemotherapy.

  2. The rates of complete remission with incomplete count recovery (CRi) for patients treated with selinexor and venetoclax in combination with chemotherapy at the RP2D.

    CRi is defined as bone marrow with < 5% blasts confirmed by flow cytometry, ANC < 500/μL or platelets < 50,000/μL without transfusions, and no evidence of extramedullary disease

    Measured: The final response of each patient will be determined no later than day 42 from the start of chemotherapy.

  3. The overall survival of patients treated at the RP2D.

    Overall survival is defined as the time elapsed from protocol enrollment to death, with data for living patients censored at last follow-up. We will report KM estimates with 95% CIs.

    Measured: Survival of each patient will be determined one year from enrollment.

  4. The rates of exceptional response for those patients treated during the Dose-escalation phase.

    Exceptional Response is defined as patients who have at least 2-log (100-fold) reduction in bone marrow MRD at day 15 compared to bone marrow blast percentage at enrollment.

    Measured: Day 15

  5. The rates of exceptional response for those patients treated during the Dose Expansion Phase (Cohort A).

    Exceptional Response is defined as patients who have at least 2-log (100-fold) reduction in bone marrow MRD at day 15 compared to bone marrow blast percentage at enrollment.

    Measured: Day 15

  6. The rates of exceptional response for those patients treated during the Dose Expansion Phase (Cohort B).

    Exceptional Response is defined as patients who have at least 2-log (100-fold) reduction in bone marrow MRD at day 15 compared to bone marrow blast percentage at enrollment.

    Measured: Day 15

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 May 2021
  2. Study start15 Nov 2021
  3. Primary completion12 Jul 2023
  4. Study completionSep 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
37 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04898894
Sponsor's protocol ID
SELCLAX
Other IDs
NCI-2021-03435
Status last verified
Oct 2026
First submitted
14 May 2021
Last updated
6 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: Individual participant de-identified datasets containing the variables analyzed in the published article will be made available (related to the study primary or secondary objectives contained in the publication). Supporting documents such as the protocol, statistical analyses plan, and informed consent are available through the CTG website for the specific study. Data used to generate the published article will be made available at the time of article publication. Investigators who seek access to individual level de-identified data will contact the computing team in the Department of Biostatistics (ClinTrialDataRequest@stjude.org) who will respond to the data request.

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Venetoclax, Selinexor and Cytarabine in people with Acute Leukemia of Ambiguous Lineage in Relapse and Acute Myeloid Leukemia, in Relapse, run by St. Jude Children's Research Hospital at 8 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 20 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 6 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 8 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

The recommended phase 2 dose (RP2D) of venetoclax plus selinexor plus chemotherapy. (time frame: For each patient, the monitoring time period for dose-limiting toxicity will extend for 35 days from receipt of the first dose of protocol-directed selinexor or venetoclax.). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04898894.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Oct 2026.

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