Open Label Ruxolitinib (INCB018424) in Patients With Myelofibrosis and Post Polycythemia Vera/Essential Thrombocythemia Myelofibrosis

A Phase 1/2, Open-Label Study of the JAK2 Inhibitor INCB018424 Administered Orally to Patients With Primary Myelofibrosis (PMF) and Post Polycythemia Vera/Essential Thrombocythemia Myelofibrosis (Post-PV/ET)

To determine the safety, tolerability and effectiveness of ruxolitinib (INCB018424), administered orally to patients with Primary Myelofibrosis (PMF), Post Polycythemia Vera Myelofibrosis (PPV-MF) and Essential Thrombocythemia Myelofibrosis (PET-MF).

This is a multicenter, open-label, non-randomized, dose escalation study of ruxolitinib, a small molecule Janus kinase (JAK) inhibitor, administered orally to patients with PMF, PPEV-MF or PET-MF. The study is comprised of 3 parts:

Part 1: Dose escalation and determination of maximum tolerated dose (complete).

Part 2: Exploration of alternative dosing schedules (complete).

Part 3: Further evaluation of selected dose regimens, including additional response measures to explore effect of ruxolitinib on symptoms and other parameters including daily physical activity and long-term survival (ongoing).

Inclusion Criteria:

• Diagnosed with PMF or Post-PV/ET MF
• Patients with myelofibrosis requiring therapy
• Adequate bone marrow reserve

Exclusion Criteria:

• Received anti-cancer medications or investigational therapy in the past 14 days