title: Efficacy and safety of JAK inhibitor INC424 in patients with primary and post-polycythemia vera or post-essential thrombocythemia myelofibrosis in the Chinese population.
abstract: A phase II study (A2202) was performed to evaluate the efficacy and safety of JAK inhibitor ruxolitinib in 63 Chinese MF patients. Ruxolitinib was given twice a day (bid) at a starting dose of 15 mg (n = 25) or 20 mg (n = 38) based on a baseline platelet count. About 94.7% of the patients achieved a reduction in spleen size, 27.0% of which exhibited significant reduction (≥ 35%) at week 24. Significant improvement in debilitating constitutional symptoms, as assessed by MFSAF v2.0, was observed in patients treated with ruxolitinib. Ruxolitinib treatment was generally well tolerated by Chinese patients. Although the treatment was associated with an increase in certain adverse events (AEs) that were established as identified risks (anemia and thrombocytopenia), these AEs were considered manageable in this clinical setting. Ruxolitinib provided substantial reductions in splenomegaly and improvements in symptoms, and was well-tolerated by Chinese patients with MF.
authors.affiliation: Department of Hematology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Du
authors.affiliation: Department of Hematology, Peking Union Medical College Hospital, Beijing, 100730, China. zhoudb@pumch.cn.
authors.forename: Daobin
authors.initials: D
authors.lastname: Zhou
mesh_terms: D000328:Adult; D000368:Aged; D002681:China; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009570:Nitriles; D009929:Organ Size; D011087:Polycythemia Vera / Q000150:complications*; D055728:Primary Myelofibrosis / Q000150:complications / Q000188:drug therapy*; D047428:Protein Kinase Inhibitors / Q000008:administration & dosage* / Q000009:adverse effects; D011720:Pyrazoles / Q000008:administration & dosage* / Q000009:adverse effects; D011743:Pyrimidines; D013154:Spleen / Q000187:drug effects / Q000473:pathology; D013920:Thrombocythemia, Essential / Q000150:complications*; D016896:Treatment Outcome
chemical_list: D009570:Nitriles; D047428:Protein Kinase Inhibitors; D011720:Pyrazoles; D011743:Pyrimidines; C540383:ruxolitinib
keywords: Chinese patients; JAK; myelofibrosis; ruxolitinib