Pacritinib For Bone Marrow Fibrosis In Patients With Myelofibrosis Who Have Thrombocytopenia

We hypothesize that pacritinib leads to modification of the myelofibrosis (MF) disease phenotype, especially related to BM fibrosis and cytopenias; due potentially to its dual effect as an inhibitor of the JAK and NFκB pathways, through its targets JAK2 and IRAK1 respectively, leading to a decrease of inflammatory cytokines and/or effects on stem/progenitor populations restoring hematopoiesis New evidence suggests that blocking simultaneously the JAK/STAT and NF-κB pathways might have a beneficial effect on aspects that only inhibition of the JAK pathway cannot achieve: partial recovery of BM histology and PACRIMYEL is a multicenter, open-label, single arm, phase II, exploratory study including patients with MF and platelet count between 50 - 120 x 109/L. Clinic visits will occur on weeks 4, 8, 12, 24, 36 and 52 during the first year and every 12 weeks during the second year of the treatment, and pacritinib will be dispensed at every visit to the clinic. Bone fibrosis will be assessed by biopsy and MRI imaging \[mDixon Quant "(Philips), IDEAL IQ (General Electric) or qDixon (Siemens)\] on weeks 24 and 52 after the first dose of study treatment. Splenomegaly and SVR (Splenic Volume Reduction) will be assessed by physical exam and MRI imaging on weeks 24 and 52 after the first dose of study treatment if splenomegaly at diagnosis. Same MRI to evaluate BM imaging will be used to measure spleen volume. Additionally, spleen size will be assessed by physical exam during the routin…

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A Responsible Person Designated by the sponsor, M.D., PhD.  ·  0034934344412  ·  investigacio@mfar.net

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