Study of Lenzilumab (KB003) in Previously Treated Patients With Chronic Myelomonocytic Leukemia (CMML)


  • Study type

  • Study phase

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

  • Site IRB
    • Rochester, Minnesota: 15-001181
    NCT ID: NCT02546284
    Sponsor Protocol Number: KB003-05

About this study

This is a multicenter, open-label, repeat-dose, Phase 1 Dose Escalation Study to evaluate safety, pharmacokinetics, and clinical activity.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria:

  • Confirmed diagnosis of CMML
  • CMML that is refractory to, or progressed following treatment with a hypomethylating agent or other standard of care treatment
  • Eastern Cooperative Oncology Group (ECOG) score ≤ 2
  • Able to provide bone marrow biopsy samples
  • Acceptable laboratory results

Exclusion Criteria:

  • Leukemia other than CMML
  • Recent chemotherapy or radiation therapy (within 14 days before first dose of lenzilumab)
  • Concurrent use of human granulocyte-macrophage colony-stimulating factor
  • Pregnant or breastfeeding
  • Know HIV virus infection
  • History of another malignancy within the past 2 years (some skin cancer and prostate cancers permitted)
  • Significant intercurrent illness
  • History or current diagnosis of Pulmonary Alveolar Proteinosis or Hypoxemia

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Mrinal Patnaik, M.B.B.S.

Open for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office



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