Primary Myelofibrosis Clinical Trial
Official title:
JAK Inhibitor Prior to Allogeneic Stem Cell Transplant for Patients With Primary and Secondary Myelofibrosis: A Prospective Study
This phase II trial studies how well giving a JAK inhibitor before a donor stem cell transplant works in treating patients with myelofibrosis that developed without another condition (primary) or evolved from other bone marrow disorders (secondary). JAK inhibitors are a class of drugs that may stop the growth of abnormal cells by blocking an enzyme needed for cell growth. Giving a JAK inhibitor such as ruxolitinib before a donor stem cell transplant may help reduce symptoms of myelofibrosis such as inflammation and enlargement of the spleen, improve the patient's general physical condition, and prevent complications from occurring after the transplant. Infusing healthy stem cells from a donor into the patient may help the patient's bone marrow work normally and make stem cells, red blood cells, white blood cells, and platelets. Giving a JAK inhibitor before a donor stem cell transplant may help improve transplant outcomes in patients with myelofibrosis.
OUTLINE: PART 1: Patients receive ruxolitinib orally (PO) twice daily (BID) from at least 8 weeks prior to the start of conditioning through day -4 before transplantation, with a taper schedule reducing the dose every 2-3 days beginning after day -4. PART 2: Patients are assigned to 1 of 2 conditioning regimens at the discretion of the clinical provider and Clinical Coordinators Office (CCO). MYELOABLATIVE CONDITIONING: Patients receive fludarabine phosphate intravenously (IV) over 1 hour on days -8 to -6 (umbilical cord blood transplant recipients only), cyclophosphamide IV on days -7 and -6, and busulfan IV over 3 hours on days -5 to -2. REDUCED-INTENSITY CONDITIONING: Patients receive fludarabine phosphate IV over 1 hour on days -6 to -2 and melphalan IV over 15-30 minutes on days -3 and -2. Patients also undergo total-body irradiation (TBI) on day -1 (umbilical cord blood transplant recipients only). TRANSPLANT: Patients undergo allogeneic hematopoietic stem cell transplant or umbilical cord blood transplant on day 0. GRAFT-VERSUS-HOST DISEASE (GVHD) PROPHYLAXIS: Patients receive tacrolimus IV continuously (inpatients) or over 1-2 hours twice daily (BID) (outpatients) or orally (PO) BID on days -1 to +180 (patients receiving related or unrelated stem cells) or days -3 to +180 (patients receiving umbilical cord blood) with taper beginning on day +56 (related donor recipients) or +100 (unrelated donor or umbilical cord blood recipients) in the absence of GVHD. Patients also receive methotrexate IV on days +1, +3, +6, and +11 (related and unrelated donor recipients only) or mycophenolate mofetil IV or PO every 8 hours on days 0 to +40 with taper to day +96 (umbilical cord blood transplant recipients only). After completion of study treatment, patients are followed up at 6 months, 1 year, and then yearly for 4 years. ;
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