A Phase 2 Open-Label, Dose-Ranging Study of the Efficacy and Safety of Orally Administered SAR302503 in Japanese Patients With Intermediate-2 or High Risk Primary Myelofibrosis, Post-Polycythemia Vera Myelofibrosis, Post-Essential Thrombocythemia Myelofibrosis With Splenomegaly

Study start date: November 1, 2012

Inclusion criteria : Diagnosis of primary or post-polycythemia vera or post-essential thrombocythemia myelofibrosis Myelofibrosis classified as high-risk or intermediate-risk level 2 Enlarged spleen, palpable at least 5 cm below costal margin Active symptoms of myelofibrosis At least 20 years of age Eastern Collaborative Oncology Group (ECOG) performance status (PS) of 0, 1, or 2 at study entry Absence of active malignancy other than myelofibrosis Written informed consent to participate. Exclusion criteria: Splenectomy. Any recent chemotherapy (eg, hydroxyurea), immunomodulatory drug therapy (eg, thalidomide, interferon-alpha), immunosuppressive therapy, corticosteroids >10 mg/day prednisone or equivalent, or growth factor treatment (eg, erythropoietin), hormones (eg, androgens, danazol) within 14 days prior to initiation of study drug. Major surgery therapy within 28 days or radiation including spleen radiation within 6 months prior to initiation of study drug. Concomitant treatment with or use of pharmaceutical or herbal agents known to be moderate or severe inhibitors or inducers CYP3A4. Active acute infection requiring antibiotics. Uncontrolled congestive heart failure (New York Heart Association Classification 3 or 4), angina, myocardial infarction, cerebrovascular accident, coronary/peripheral artery bypass graft surgery, transient ischemic attack, or pulmonary embolism within 3 months prior to initiation of study drug. Participation in any study of an investigational agent (drug, biologic, device) within 30 days, unless during nontreatment phase. Prior treatment with a JAK 2 Inhibitor. Treatment with aspirin in doses >150 mg/day Known human immunodeficiency virus or acquired immunodeficiency syndrome-related illness. Pregnant or lactating female. Once the lactating female stop and participate in the study, she cannot re-start feeding the baby. Women of childbearing potential, unless using effective contraception while on study drug. Otherwise patients must be post-menopausal (at least 1 years from last menstruation without other medical reason), or surgically sterile. Known active (acute or chronic) Hepatitis A, B, or C; and hepatitis B and C carriers. Prior history of chronic liver disease (eg, chronic alcoholic liver disease, autoimmune hepatitis, sclerosing cholangitis, primary biliary cirrhosis, hemachromatosis, non-alcoholic steatohepatitis [NASH]) The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.