The goal of this clinical research study is to learn if rigosertib can help to control MF in patients with anemia. The safety of this drug will also be studied. This is an investigational study. Rigosertib is not FDA-approved or commercially available. It is currently being used for research purposes only. The study doctor can explain how the study drug is designed to work. Up to 35 participants will be enrolled in this study. All will be enrolled at MD Anderson.
Name: Rigosertib
Description: Participants take 560 mg Rigosertib by mouth in the morning (two 280 mg capsules) and 560 mg Rigosertib in the afternoon.Type: DrugRigosertib
Name: Questionnaire
Description: Quality of life questionnaire completed on Day 1 of Cycle 1. It should take about 10-15 minutes to complete.Type: BehavioralRigosertib
Description: Spleen response defined as ≥ 35% spleen volume reduction from Baseline, which must be confirmed by MRI or CT measurement per revised International Working Group for Myelofibrosis Research and Treatment (IWG MRT) response criteria.
Measure: Change in Spleen Volume Time: Baseline and 48 weeksDescription: Anemia response defined as the proportion of transfusion-independent patients with Hgb increase of at least 2 g/dL from Baseline or the proportion of transfusion-dependent patients becoming transfusion independent for at least 12 weeks as defined in 2013 International Working Group for Myelofibrosis Research and Treatment (IWG-MRT) criteria.
Measure: Change in Anemia Response Time: Baseline and 48 weeksDescription: Symptoms response defined as the proportion of patients achieving ≥ 50% reduction in the Myeloproliferative Neoplasm Symptom Assessment Form Total Symptom Score (MPN-SAF TSS) at any time before Week 48.
Measure: Symptoms Response Time: 48 weeksSingle Group Assignment
There is one SNP
Measurement of JAK2 V617F allele burden in BM samples, if not done within 6 months prior to Screening, must be provided with the Screening BM biopsy/aspirate report (patients are eligible regardless of JAK2 mutation status); 3. Anemia or RBC-transfusion dependence defined as follows: a) Anemia: defined for the purpose of this protocol as 1) a hemoglobin level <10 g/L on every determination over 84 days before study-entry, without RBC-transfusions, or 2) a hemoglobin level <10 g/L on a patient that is receiving RBC-transfusions periodically but not meeting criteria for transfusion-dependent patient as defined below. --- V617F ---