Mitoxantrone for Venetoclax-Resistant Acute Myeloid Leukemia

This study is for people aged 18 to 80 with acute myeloid leukemia (AML) that has come back or didn't respond to previous treatment with venetoclax and a hypomethylating agent (HMA) like azacitidine or decitabine. It is testing a new combination of medicines: mitoxantrone, venetoclax, and azacitidine. Venetoclax works by blocking a protein called Bcl-2, which helps cancer cells survive. Researchers want to find the safest and most effective dose of mitoxantrone when given with venetoclax and azacitidine. They will also look at how many participants respond to the treatment and the number of serious side effects. The study plans to enroll 30 participants.

Study design
This is an open-label, Phase 1 study, meaning both you and your doctors will know which treatments you are receiving. It will involve a dose-finding stage followed by expansion cohorts.
What's involved
You will receive venetoclax, azacitidine, and mitoxantrone. The mitoxantrone will be given intravenously (into a vein) on days 1-4 of each cycle. Treatment will continue until the maximum tolerated dose is found, up to 5 cycles if needed.
Compensation
Not stated in the trial record.
Follow-up
Researchers will monitor your response to treatment and any side effects from the start of treatment up to one year.

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NCT06429449

Mitoxantrone for Venetoclax Resistant Acute Myeloid Leukemia

Recruiting
PHASE1Ages 18–80InterventionalTreatment
University of Colorado, Denver
~30 participants
Updated 2026-01-15 on ClinicalTrials.gov
What's tested:VenetoclaxAzacitidineMitoxantrone

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Maximum tolerated dose (MTD)
Measured over Reassessment at end of each cycle (28 days) until MTD reached, up to 5 cycles total if needed
+2 more outcomes measured
Leukemia
Myeloid Leukemia
Monocytic Leukemia
1 sites across 1 states
Colorado1
  • Andrew Kent, MD, PhD · PRINCIPAL_INVESTIGATOR · University of Colorado, Denver

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Eligibility criteria

Inclusion

Unless considered due to leukemic organ involvement 8. Non-sterile male subjects must use contraceptive methods with partner(s) at least prior to beginning study drug administration and continuing up to 90 days after the last dose of study drug. No contraception is required if male subjects are surgically sterile (vasectomy with medical assessment confirming surgical success) or if the male subject has a female partner who is postmenopausal or permanently sterile (bilateral oophorectomy, bilateral salpingectomy or hysterectomy). 9. Female subjects must be either:
  • Maximum tolerated dose (MTD)Reassessment at end of each cycle (28 days) until MTD reached, up to 5 cycles total if needed

    Cohort 1: Determine the maximum tolerated (MTD) and/or recommended phase 2 dose (RP2D) of mitoxantrone in combination with venetoclax+azacitidine.

  • Overall response rateBaseline to End of Treatment (up to 1 year)

    Cohort 2: Overall response rate (CR+CRi+PR+MLFS) after treatment with mitoxantrone and venetoclax+azacitidine

  • Number of grade 4 or 5 adverse eventsBaseline to End of Treatment (up to 1 year)

    Cohorts 3 and 4: determine the safety of mitoxantrone in combination or in sequence with standard of care venetoclax+azacitidine