Onconova Therapeutics Announces The Peer-Reviewed Publication Of Preclinical Data Demonstrating The Synergistic Anti-Cancer Activity Of Rigosertib Combined With Immune Checkpoint Blockade

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NEWTOWN, Pa., June 17, 2021 (GLOBE NEWSWIRE) — Onconova Therapeutics, Inc. (NASDAQ: ONTX) (“Onconova”), a clinical-stage biopharmaceutical company focused on discovering and developing novel products for patients with cancer, today announced the publication of a preclinical study in the journal Molecular Cancer. The study, entitled “Novel induction of CD40 expression by tumor cells with RAS/RAF/PI3K pathway inhibition augments response to checkpoint blockade,” showed that rigosertib synergistically enhanced the efficacy of ICB in a murine melanoma model via the induction of immune-mediated cancer cell death.

“The data from this recent publication demonstrate rigosertib’s potential to address a pressing unmet need, as many patients do not respond to immune checkpoint blockade due to immunosuppressive tumor microenvironments,” said Ann Richmond, Ph.D., Ingram Professor of Pharmacology and Medicine at the Vanderbilt University School of Medicine and lead author of the study. “By reversing immunosuppressive tumor microenvironments, rigosertib overcame pro-tumor resistance mechanisms and synergistically enhanced the efficacy of immune checkpoint blockade in a difficult-to-treat murine melanoma model. These compelling findings provide preclinical proof-of-concept for rigosertib-immune checkpoint blockade combination therapy and strongly support its evaluation in clinical trials.”

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