PMID- 28622623 OWN - NLM STAT- MEDLINE DCOM- 20171031 LR - 20210604 IS - 1873-5835 (Electronic) IS - 0145-2126 (Print) IS - 0145-2126 (Linking) VI - 60 DP - 2017 Sep TI - A phase 2 study of momelotinib, a potent JAK1 and JAK2 inhibitor, in patients with polycythemia vera or essential thrombocythemia. PG - 11-17 LID - S0145-2126(17)30416-2 [pii] LID - 10.1016/j.leukres.2017.05.002 [doi] AB - Momelotinib is a potent inhibitor of JAK1 and JAK2 that demonstrated efficacy in patients with primary and secondary myelofibrosis. This phase 2, open-label, randomized study evaluated the efficacy and safety of oral once-daily momelotinib (100mg and 200mg) for the treatment of polycythemia vera (PV) and essential thrombocythemia (ET). The primary endpoint for PV was overall response rate (ORR), defined as the proportion of patients with hematocrit <45%, white blood cell count <10x10(9)/L, platelet count /=4 weeks. The definition of ORR for ET excluded the hematocrit component. A total of 39 patients (28 PV, 11 ET) were enrolled, with 28 patients receiving >/=12 weeks of treatment. The study was terminated due to limited efficacy. Two patients (ORR 5.1%) met the primary efficacy endpoint (both PV 200mg). Predose plasma levels of momelotinib were stable over time. A total of 31 (79.5%) patients experienced momelotinib-related adverse events (AEs), the most frequent being headache (23.1%), dizziness (18.0%), somnolence (15.4%), nausea (15.4%), and fatigue (15.4%). Three patients experienced serious AEs (7.7%), with 1 considered related to momelotinib (dyspnea). Peripheral neuropathy occurred in 7 (17.9%) patients (4 PV, 3 ET). CI - Copyright (c) 2017 The Authors. Published by Elsevier Ltd.. All rights reserved. FAU - Verstovsek, Srdan AU - Verstovsek S AD - The University of Texas, MD Anderson Cancer Center, Houston, TX, USA. Electronic address: kjnewber@mdanderson.org. FAU - Courby, Stephane AU - Courby S AD - Centre Hospitalier Universitaire de Grenoble, Grenoble, France. FAU - Griesshammer, Martin AU - Griesshammer M AD - Johannes Wesling Klinikum Minden, University of Bochum, Germany. FAU - Mesa, Ruben A AU - Mesa RA AD - Mayo Clinic, Scottsdale, AZ, USA. FAU - Brachmann, Carrie Baker AU - Brachmann CB AD - Gilead Sciences, Inc., Foster City, CA, USA. FAU - Kawashima, Jun AU - Kawashima J AD - Gilead Sciences, Inc., Foster City, CA, USA. FAU - Maltzman, Julia D AU - Maltzman JD AD - Gilead Sciences, Inc., Foster City, CA, USA. FAU - Shao, Lixin AU - Shao L AD - Gilead Sciences, Inc., Foster City, CA, USA. FAU - Xin, Yan AU - Xin Y AD - Gilead Sciences, Inc., Foster City, CA, USA. FAU - Huang, Daniel AU - Huang D AD - The Oncology Institute of Hope and Innovation, Santa Ana, CA, USA. FAU - Bajel, Ashish AU - Bajel A AD - Department of Clinical Haematology and Bone Marrow Transplantation, Royal Melbourne Hospital, Victoria, Australia. LA - eng SI - ClinicalTrials.gov/NCT01998828 GR - P30 CA054174/CA/NCI NIH HHS/United States PT - Clinical Trial, Phase II PT - Journal Article PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20170530 PL - England TA - Leuk Res JT - Leukemia research JID - 7706787 RN - 0 (Benzamides) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Pyrimidines) RN - 6O01GMS00P (N-(cyanomethyl)-4-(2-((4-(4-morpholinyl)phenyl)amino)-4-pyrimidinyl)benzamide) RN - EC 2.7.10.2 (JAK1 protein, human) RN - EC 2.7.10.2 (JAK2 protein, human) RN - EC 2.7.10.2 (Janus Kinase 1) RN - EC 2.7.10.2 (Janus Kinase 2) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Benzamides/adverse effects/*therapeutic use MH - Female MH - Humans MH - Janus Kinase 1/antagonists & inhibitors MH - Janus Kinase 2/antagonists & inhibitors MH - Male MH - Middle Aged MH - Polycythemia Vera/*drug therapy MH - Protein Kinase Inhibitors/adverse effects/*therapeutic use MH - Pyrimidines/adverse effects/*therapeutic use MH - Thrombocythemia, Essential/*drug therapy MH - Treatment Outcome PMC - PMC8170698 MID - NIHMS1698100 OTO - NOTNLM OT - Essential thrombocythemia OT - Momelotinib OT - Phase 2 study OT - Polycythemia vera EDAT- 2017/06/18 06:00 MHDA- 2017/11/01 06:00 PMCR- 2021/06/02 CRDT- 2017/06/17 06:00 PHST- 2017/01/19 00:00 [received] PHST- 2017/05/04 00:00 [accepted] PHST- 2017/06/18 06:00 [pubmed] PHST- 2017/11/01 06:00 [medline] PHST- 2017/06/17 06:00 [entrez] PHST- 2021/06/02 00:00 [pmc-release] AID - S0145-2126(17)30416-2 [pii] AID - 10.1016/j.leukres.2017.05.002 [doi] PST - ppublish SO - Leuk Res. 2017 Sep;60:11-17. doi: 10.1016/j.leukres.2017.05.002. Epub 2017 May 30.