Evaluating INCA033989 for Myeloproliferative Neoplasms

A Phase 1, Open-Label, Multicenter Study of INCA033989 Administered as a Monotherapy or in Combination With Ruxolitinib in Participants With Myeloproliferative Neoplasms

PHASE1 · Incyte Corporation · NCT05936359

This study is testing a new drug called INCA033989 to see how safe it is and how well it works for people with myeloproliferative neoplasms, both on its own and with another medication.

Quick facts

PhasePHASE1
Study typeInterventional
Enrollment225 (estimated)
Ages18 Years and up
SexAll
SponsorIncyte Corporation (industry)
Drugs / interventionschemotherapy, ruxolitinib
Locations29 sites (Herston, Queensland and 28 other locations)
Trial IDNCT05936359 on ClinicalTrials.gov

What this trial studies

This study evaluates the safety and tolerability of INCA033989, both alone and in combination with ruxolitinib, in patients with myeloproliferative neoplasms. It aims to determine the maximum tolerated dose and recommended dose for expansion through monitoring dose-limiting toxicity. Participants will undergo regular bone marrow biopsies and aspirates to assess treatment effects. The study focuses on patients with specific mutations and conditions related to myeloproliferative neoplasms.

Who should consider this trial

Good fit: Ideal candidates include individuals with myeloproliferative neoplasms who have a documented CALR mutation and a life expectancy of more than 6 months.

Not a fit: Patients with other hematological malignancies or those with active invasive malignancies may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with myeloproliferative neoplasms.

How similar studies have performed: Other studies have shown promise with similar approaches, but this specific combination is being evaluated for the first time.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Life expectancy \> 6 months.
* Willingness to undergo a pretreatment and regular on-study BM biopsies and aspirates (as appropriate to disease).
* Existing documentation from a qualified local laboratory of CALR exon-9 mutation.
* Participants with MF and ET as defined in the protocol.

Exclusion Criteria:

* Presence of any hematological malignancy other than ET, PMF, or post-ET MF.
* Active invasive malignancy over the previous 2 years.
* Active HBV/HCV, HIV.
* History of clinically significant or uncontrolled cardiac disease.
* Has undergone any prior allogenic or autologous stem-cell transplantation or such transplantation is planned.
* Laboratory values outside the Protocol-defined ranges.
* Participants undergoing treatment with G-CSF, GM-CSF, or TPO-R agonists at any time within 4 weeks before the first dose of study treatment.
* Prior history of major bleeding, or thrombosis within the last 3 months prior to study enrollment.
* Any prior chemotherapy, immunomodulatory drug therapy, immunosuppressive therapy, biological therapy, endocrine therapy, targeted therapy, antibody, or hypomethylating agent used to treat the participant's disease within 5 half-lives or 28 days (whichever is shorter) before the first dose of study treatment.
* For TGBs only: Undergoing treatment with a potent/strong inhibitor or inducer of CYP 3A4/5 within 14 days or 5 half-lives (whichever is longer) before the first dose of study treatment, or expected to receive such treatment during the study.

Other protocol-defined Inclusion/Exclusion Criteria may apply.

Where this trial is running

Herston, Queensland and 28 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Myeloproliferative Neoplasms, Ruxolitinib, Myelofibrosis, Essential thrombocythemia, CALR mutation

Last reviewed 2026-05-15 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.