This trial is active, not recruiting.

Condition myelodysplastic syndromes
Treatment oral rigosertib
Phase phase 2
Sponsor Onconova Therapeutics, Inc.
Start date July 2013
End date August 2017
Trial size 45 participants
Trial identifier NCT01904682, 2013-000672-15, Onconova 09-07


The study will enroll low risk MDS patients who need red blood cell transfusions and who are refractory to or are not using erythropoiesis-stimulating agents. The purpose of the study is to determine whether oral rigosertib treatment results in hematological improvements according to the 2006 International Working Group criteria in these patients. The study will also record any side effects that may occur during the study.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Intervention model single group assignment
Primary purpose treatment
Masking no masking
Patients will take 560 mg oral rigosertib (two 280 mg capsules) in the morning and 280 mg (one 280 mg capsule) in the afternoon, in fasting conditions, for 21 consecutive days of 21-day cycle (continuous regimen).
oral rigosertib ON 01910.Na
Dose of 560 mg consists of two (2) 280 mg soft gel capsules of rigosertib.

Primary Outcomes

Hematologic Improvement
time frame: 24 Weeks

Secondary Outcomes

Overall Response
time frame: Up to 2 years
Duration of Response
time frame: Up to 2 years
Number of Adverse Events
time frame: Up to 2 years

Eligibility Criteria

All participants at least 18 years old.

Inclusion Criteria: - Diagnosis of MDS according to World Health Organization (WHO) criteria (Appendix 2) or French-American-British (FAB) classification that must be confirmed by bone marrow (BM) aspirate and/or biopsy within 6 weeks prior to Screening. - Myelodysplastic syndrome (MDS) classified as Low risk or Int-1 risk, according to International Prognostic Scoring System (IPSS) classification; in addition, patients should never have been classified as Int-2 or High-risk since their MDS was diagnosed; - Transfusion dependency defined by transfusion of at least 4 units of Red blood cells (RBC) within 56 days before Screening (pre-transfusion Hgb values values must be ≤ 9 g/dL to be taken into account). - Refractory to 8- to 12-week course of Erythropoiesis-stimulating agent (ESA) administered within the past 2 years before enrollment, or erythropoietin (EPO) level ˃ 500 mU/mL and off ESA for at least 8 weeks before Screening. - Off all other treatments for MDS (azacitidine, decitabine, lenalidomide, chemotherapy, immunotherapy) for at least 2 weeks prior to Screening. - Eastern Cooperative Oncology Group(ECOG) performance status of 0, 1 or 2. - Willing to adhere to the prohibitions and restrictions specified in this protocol. - The patient must signed an informed consent form (ICF) indicating that s/he understands the purpose of, and procedures required for, the study and is willing to participate. Exclusion Criteria: - Ongoing clinically significant anemia due to factors such as iron, vitamin B12, or folate deficiencies, auto-immune or hereditary hemolysis, or gastrointestinal (GI) bleeding. - Serum ferritin < 50 ng/mL. - Hypoplastic MDS (cellularity <10%) - Any active malignancy within the past year, except basal cell or squamous cell skin cancer or carcinoma in situ of the cervix or breast. - Uncontrolled intercurrent illness including, but not limited to, symptomatic congestive heart failure, unstable angina pectoris, or cardiac arrhythmia. - Active infection not adequately responding to appropriate therapy. - Total bilirubin ≥ 2.0 mg/dL not related to hemolysis or Gilbert's disease. - Alanine transaminase (ALT) or aspartate transaminase (AST) ≥ 2.5 x the upper limit of normal (ULN). - Serum creatinine ≥ 2.0 mg/dL. - Ascites requiring active medical management including paracentesis. - Hyponatremia (defined as serum sodium value of < 130 mEq/L). - Female patients who are pregnant or lactating. - Patients of childbearing potential who are unwilling to follow strict contraception requirements. - Female patients with reproductive potential who do not have a negative blood or urine pregnancy test at Screening. - Major surgery without full recovery or major surgery within 3 weeks of Screening. - Uncontrolled hypertension (defined as a systolic pressure ≥ 160 mmHg and/or a diastolic pressure ≥ 110 mmHg). - New onset seizures (within 3 months prior to the first dose of rigosertib) or poorly controlled seizures. - Any other concurrent investigational agent or chemotherapy, radiotherapy, or immunotherapy. - Chronic use (˃ 2 weeks) of corticosteroids (˃ 10 mg/24 hr equivalent prednisone) within 4 weeks of Screening. - Investigational therapy within 4 weeks of Screening. - Allergy to a local anaesthetic. - Psychiatric illness or social situation that would limit the patient's ability to tolerate and/or comply with study requirements.

Additional Information

Official title A Single-arm Study to Assess the Efficacy and Safety of Oral Rigosertib in Transfusion-dependent, Low or Intermediate-1, Myelodysplastic Syndrome Patients Based on the International Prognostic Scoring System
Description This will be a Phase II, single-arm, multicenter study (approximately 15 centers). Approximately 40 transfusion-dependent patients with Low- or Int-1 risk Myelodysplastic Syndrome (MDS) by International Prognostic Scoring System (IPSS) will be enrolled and treated with oral rigosertib administered twice daily for 21 consecutive days of a 21-day cycle (continuous regimen) in order to obtain at least 35 evaluable patients treated for at least 8 weeks. Patients will take 560 mg rigosertib (two 280 mg capsules) in the morning and 280 mg (one 280 mg capsule) in the afternoon, in fasting conditions. All patients on intermittent regimen at the time of Amendment 2 of the Protocol will be switched to the continuous regimen, including patients on reduced doses.
Trial information was received from ClinicalTrials.gov and was last updated in March 2017.
Information provided to ClinicalTrials.gov by Onconova Therapeutics, Inc..