On March 25, 2019 Onconova Therapeutics, Inc. (Nasdaq: ONTX), a Phase 3 stage biopharmaceutical company focused on discovering and developing small molecule drug candidates to treat cancer reported that it has surpassed the 75 percent enrollment milestone in its pivotal Phase 3 trial of rigosertib for the potential treatment of high-risk myelodysplastic syndromes (HR-MDS), a study known as INSPIRE (Press release, Onconova, MAR 25, 2019, View Source [SID1234534593]).
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"We are pleased to have passed the 75 percent completion of enrollment milestone and are on track with our anticipated timeline for completion of accrual to the INSPIRE study in the second half of 2019," said Dr. Richard Woodman, Onconova’s Chief Medical Officer and Senior Vice President of Research & Development. "Rigosertib has the potential to be the first new MDS treatment in more than 15 years for a condition afflicting an estimated 59,000 patients in the United States."
Dr. Steven M. Fruchtman, President and CEO of Onconova, stated, "Clinical execution including completing our INSPIRE study remains our top priority. In addition to near-term milestones for the INSPIRE study, we are advancing business development discussions and remain on track to reach other important clinical milestones throughout 2019 and into 2020. This includes advancing our oral rigosertib program in MDS. We are grateful to patients and to our valued partners for their participation in the important INSPIRE study, and look forward to completing patient enrollment later this year."
The INSPIRE study is a Phase 3, open label, randomized, controlled, international study designed to determine the efficacy, safety and tolerability of single agent intravenous (IV) rigosertib to treat second-line higher-risk MDS patients. The trial includes patients under the age of 82 who have progressed on, relapsed, or failed to respond to previous treatment with hypomethylating agent (HMA) therapy within nine cycles over the course of one year after initiation of HMA therapy. Patients are randomized to receive either rigosertib with best supportive care, or the physician’s choice of therapy with best supportive care. The primary endpoint of the study is the sequential analysis of overall survival of all randomized patients in the intent-to-treat population, and the International Prognostic Scoring System – Revised (IPSS-R) Very High-Risk subgroup. Based on the promising survival signal observed by the Independent Data Monitoring Committee at interim analysis in early 2018, the Committee recommended that the trial continue with an expansion in enrollment to 360 patients based on a pre-planned sample size re-estimation.
Persons interested in participating in the INSPIRE study can obtain more information by visiting View Source
About Myelodysplastic Syndromes
Myelodysplastic syndromes (MDS) are conditions that can occur when the blood-forming cells in the bone marrow become dysfunctional and thus produce an inadequate number of circulating blood cells. It is frequently associated with the presence of blasts or leukemic cells in the marrow. This leads to low numbers of one or more types of circulating blood cells, leading to the need for blood transfusions. In MDS, some of the cells in the bone marrow are abnormal (dysplastic) and may have genetic abnormalities associated with them. Different cell types can be affected, although the most common finding in MDS is a shortage of red blood cells (anemia). Patients with higher-risk MDS may progress to the development of acute leukemia.