Myelofibrosis(MF)
study of the JAK inhibitor Ruxolitinib administered orally to patients with Primary Myelofibrosis (PMF), Post-Polycythemia Vera-Myelofibrosis (PPV-MF) or Post-Essential Thrombocythemia-Myelofibrosis (PET-MF)
Results Available
Clinical Study Purpose
This is a Phase IB, open-label, dose-finding study of the JAK 1 and 2 inhibitor ruxolitinib in patients with myelofibrosis (MF). The study consists of two periods: the core study period, comprising the dose escalation stage and the safety extension phase up to Week 24, then the extension study period beyond Week 24 and up to 3 years, to further characterize the safety and efficacy of ruxolitinib in this patient population. The dose escalation phase will enroll successive cohorts of patients who receive increasing doses of ruxolitinib until the maximum safe starting dose (MSSD) is determined. In the safety expansion phase, additional patients will be treated with ruxolitinib at the MSSD defined during dose escalation. The primary objective is to establish the MSSD of ruxolitinib in patients with MF and starting platelet counts < 100 x 10 ^9/L
Clinical Study Summary









Clinical Study Locations
Key Inclusion and Exclusion Criteria
Inclusion Criteria
- Require treatment for MF and classified at least as intermediate risk level 1 defined by the International Working Group.
- Platelet count < 100x10 ^9/L at screening or at Study Day 1.
Exclusion Criteria
- Received platelet transfusion within 14 days prior to Screening evaluations.
Protocol Summary
Incidence of Dose Limiting Toxicities
Timeframe: 28 days
Treatment Emergent Adverse Events (TEAE's)
Timeframe: approximately 4 years
Number of subjects achieving ≥ 50% reduction in palpable spleen length
Timeframe: 24 weeks
Change in Spleen Length as measure by palpation over time
Timeframe: 156 weeks
PK- C Reactive Protein Relationship
Timeframe: 24 weeks
PK- Interleukin 1 Receptor Antagonist Relationship
Timeframe: 24 weeks
PK- Tissue Necrosis Factor Receptor 2 Relationship
Timeframe: 24 weeks
AUC 0-Inf
Timeframe: 0.25 to 0.75, 1 to 3, and 4 to 12 hours postdose on Day 1 and predose, 0.25 to 0.75 hours, and 1 to 3 hours postdose on Day 15, with a random sample on Days 29 and 57