Clinical trial · Interventional
Ruxolitinib (INCB018424) in Participants With Primary Myelofibrosis (PMF), Post Essential Thrombocythemia-myelofibrosis and Post Polycythemia Vera-myelofibrosis (PPV-MF)
An Open-Label Assessment of Safety and Efficacy of Ruxolitinib (INCB018424) in Subjects With Primary Myelofibrosis, Post- Essential Thrombocythemia Myelofibrosis, and Post-Polycythemia Vera Myelofibrosis Who Have Platelet Counts of 50 × 10^9/L to 100 × 10^9/L
NCT01348490CI-TRIAL-00043059completedPhase 2Results postedClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
To evaluate the effects of treatment with ruxolitinib (INCB018424) on spleen volume, symptoms and potential side effects in participants with PMF, PPV-MF and PET-MF who have platelet counts of 50 x 10\^9/L to 100 x 10\^9/L. It is anticipated that individualized dose optimization from the starting ruxolitinib level of 5 mg bid will be associated with reductions in splenomegaly, MF-associated symptoms and inflammatory cytokine levels.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| MPN (Myeloproliferative Neoplasms) | Myeloproliferative Neoplasm | CURATED_BROADER | 0.80 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Ruxolitinib | Drug | Ruxolitinib | ALIAS |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- Ruxolitinib 5 mg
- description
- Participants began administration with 5 mg ruxolitinib twice daily (BID) orally. Beginning at the Week 4 visit, doses of ruxolitinib could be increased in 5 mg once a day (QD) increments every 4 weeks every 4 weeks not to exceed a dose of 25 mg BID.
- interventionNames
- Drug: Ruxolitinib
Primary outcomes (5)
- measure
- Percent Change From Baseline in Spleen Volume at Week 24 by Final Titrated Dose
- timeFrame
- Baseline and Week 24
- description
- Magnetic resonance imaging (MRI) of the upper and lower abdomen and pelvis was performed to assess spleen volumes. Computed tomography (CT) scan was performed if participant was not a candidate for MRI or if MRI was not readily available. MRI was performed with a body coil. Spleen volume was obtained by outlining the circumference of the organ and determining the volume using the validated technique of least squares. The MRI (or CT scan in applicable participants) was performed on the first or second day of the baseline period (ie, Day -7 or Day -6), and the site radiologist sent the scan to the central imaging laboratory that same day. The CT scans were processed by the same central laboratory used for MRIs.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Diagnosed with PMF, PPV-MF or PET-MF as confirmed by bone marrow biopsy * Discontinuation of all drugs used to treat underlying MF disease at least 14 days prior to baseline visit * INR \<= 1.5 or PTT value \< 1.5 x upper limit of normal (ULN) at study entry * Hemoglobin level at least 6.5 g/dL at Screening visit * Willingness to be transfused to treat low hemoglobin levels Exclusion Criteria: * Females who are pregnant, unable to comply with birth control use to avoid becoming pregnant or breastfeeding * Males who cannot comply with birth control use to avoid fathering a child * Platelet count \< 50 x10\^9/L or absolute neutrophil count (ANC) \< 1 x10\^9/L at the Screening visit * Inadequate liver or renal function; Intracranial bleeds or invasive malignancy over the previous 2 years - international normalized ratio (INR) laboratory values cannot be \> 1.5 x upper limit of normal at study entry.
References
Publications (2)
- DERIVEDTalpaz M, Prchal J, Afrin L, Arcasoy M, Hamburg S, Clark J, Kornacki D, Colucci P, Verstovsek S. Safety and Efficacy of Ruxolitinib in Patients with Myelofibrosis and Low Platelet Counts (50 - 100 x 109/L): Final Analysis of an Open-Label Phase 2 Study. Clin Lymphoma Myeloma Leuk. 2022 May;22(5):336-346. doi: 10.1016/j.clml.2021.10.016. Epub 2021 Nov 2. PMID 34911667
- DERIVEDTalpaz M, Paquette R, Afrin L, Hamburg SI, Prchal JT, Jamieson K, Terebelo HR, Ortega GL, Lyons RM, Tiu RV, Winton EF, Natrajan K, Odenike O, Claxton D, Peng W, O'Neill P, Erickson-Viitanen S, Leopold L, Sandor V, Levy RS, Kantarjian HM, Verstovsek S. Interim analysis of safety and efficacy of ruxolitinib in patients with myelofibrosis and low platelet counts. J Hematol Oncol. 2013 Oct 29;6(1):81. doi: 10.1186/1756-8722-6-81. PMID 24283202