Clinical trial Recruiting at 3 sites Observational Ages 18 and up

Using patient-derived mouse models to find drugs that make venetoclax plus azacitidine work better in AML

Official title: COSMOS-Avatar: Evaluation of Combined Sensitising and Hypomethylating Therapy Outcomes in AML PDX

Run by Clinical Hub for Interventional Research (CHOIR) · NCT06782971 · Data updated 2026-11-12

This project will test whether adding sensitizing drugs to venetoclax and azacitidine helps kill leukemia cells in people with AML by using patient-derived mouse models.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment25 (estimated)
SponsorClinical Hub for Interventional Research (CHOIR)
Government
Drugs / interventionschemotherapy
Locations4 sites (Canberra, Australian Capital Territory and 3 other locations)
StatusRecruiting
StartedJune 6, 2025
Main results expectedFebruary 2028
Study endsMarch 2030
Registry record updatedDecember 8, 2025
Trial IDNCT06782971 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18 and over with confirmed AML who are planned to start venetoclax plus azacitidine and can provide informed consent and blood or bone marrow samples are ideal candidates.

Probably not a fit

Patients who are not starting venetoclax plus azacitidine, cannot provide samples, have conditions that prevent safe participation, or whose samples fail to engraft in mice are unlikely to receive direct benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational program collects blood and bone marrow from adults with AML who are starting venetoclax plus azacitidine and uses those samples to create patient-derived xenograft (PDX) mouse models. Researchers will test multiple candidate drug combinations alongside standard-of-care in the PDX avatars to identify combinations that better kill tumor cells with minimal harm to healthy blood cells. The study will compare how the mice respond to treatments with how the original patient responded, and promising combinations will be moved into a separate Phase I clinical trial platform. Samples will be collected over up to two years through altruistic donation to build a drug-testing platform aimed at guiding precision therapies.

Why it matters

Potential benefit: If successful, this could identify better drug combinations tailored to a patient’s leukemia and speed the most promising options into early clinical trials.

How similar studies have gone: PDX models have been valuable in preclinical drug testing and have sometimes predicted patient responses, but using them routinely to guide individual patient therapy is still relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age 18 years and above
2. Patients with suspicion of AML requiring screening procedures
3. Documented diagnosis of AML by WHO Classification and/or International Consensus Classification.

   * Regardless of the number and type of prior lines of therapy or eligibility for allogeneic stem cell transplantation.
   * All AML subtypes are eligible.
   * Concurrent participation in clinical trials is allowed.
4. Documented myeloblast percentage ≥20% in the bone marrow or peripheral blood within 12 weeks of C1D1 confirmed by bone marrow aspirate or peripheral blood smear.
5. Planned to commence venetoclax and azacitidine therapy.
6. Provision of written informed consent prior to any study-related assessments or procedures being carried out.

Exclusion Criteria:

1\. Presence of any condition that, by assessment of the Investigator, would compromise the safety of the patient if they participated, the quality of trial data, or their adherence to the study-specified procedures.

Where it's running

  • Canberra Health Services
    Canberra, Australian Capital Territory, Australia
    Recruiting
  • Prince of Wales Hospital
    Sydney, New South Wales, Australia
    Recruiting
  • Westmead Hospital
    Westmead, New South Wales, Australia
    Recruiting
  • Royal North Shore Hospital
    Sydney, New South Wales, Australia
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.