Phase I Study Accessing the Safety of Pacritinib in Combination With Talazoparib in Patients With Myeloproliferative Neoplasms Unresponsive to Frontline JAK2 (Janus Kinase 2) Inhibition
This is a prospective phase I dose-escalation study, with the primary objective to access the MTD and find the RP2D of talazoparib, given in combination with standard of care dosing of pacritinib.
• Patients must have histologically or cytologically confirmed primary myelofibrosis (PMF), post-polycythemia vera-myelofibrosis (PPV-MF), post-essential thrombocythemia-myelofibrosis (PET-MF), chronic myelomonocytic leukemia, polycythemia vera, or essential thrombocytosis according to the 2008 World Health Organization criteria
• Subject has at least 2 symptoms with a score ≥ 3 or a total score of ≥ 12, as measured by the MFSAF(Myelofibrosis Symptom Assessment Form) v4.0
• Subject classified as intermediate-2 or high-risk MF, as defined by the Dynamic International Prognostic Scoring System Plus (DIPSS+70).
• Age \> 18 years.
• ECOG (Eastern Cooperative Oncology Group) performance status 0-2
• Subject must have received prior treatment with a single JAK2 inhibitor 4.1.6 for at least 12 weeks with documented disease progression OR subject must have appearance of new splenomegaly that is palpable to at least 5 cm below the left costal margin (LCM) in subjects with no evidence of splenomegaly prior to the initiation of any first line JAK2 inhibitor
• Baseline QTc (corrected QT interval) \<0.47 seconds (Bazett formula)
• Patients must have normal organ function as defined in protocol.
• Ability to understand and willingness to sign a written informed consent and HIPAA consent document