Onconova Therapeutics (ONTX) – Poster Presentations Show Activity Of Narazaciclib In Breast Cancer and Lymphoma

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Wednesday, December 13, 2023

Onconova Therapeutics is a clinical-stage biopharmaceutical company focused on discovering and developing novel products for patients with cancer. The Company has proprietary targeted anti-cancer agents designed to disrupt specific cellular pathways that are important for cancer cell proliferation. Onconova’s novel, proprietary multi-kinase inhibitor narazaciclib (formerly ON 123300) is being evaluated in a combination trial with estrogen blockade in advanced endometrial cancer. Based on preclinical and clinical studies of CDK 4/6 inhibitors, Onconova is also evaluating opportunities for combination studies with narazaciclib in additional indications. Onconova’s product candidate rigosertib is being studied in multiple investigator-sponsored studies. These studies include a dose-escalation and expansion Phase 1/2a study of oral rigosertib in combination with nivolumab in patients with KRAS+ non-small cell lung cancer, a Phase 2 program evaluating rigosertib monotherapy in advanced squamous cell carcinoma complicating recessive dystrophic epidermolysis bullosa (RDEB-associated SCC), and a Phase 2 trial evaluating rigosertib in combination with pembrolizumab in patients with metastatic melanoma.

Robert LeBoyer, Senior Vice President, Equity Research Analyst, Biotechnology, Noble Capital Markets, Inc.

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Additional Presentations At Medical Meetings Show Broad Activity and Targeting. In the past week, Onconova has presented additional narazaciclib data at the American Society of Hematology (ASH) conference and the San Antonio Breast Cancer Symposium (SABCS). These presentations show broad multi-kinase activity, improved inhibition of tumor growth, and synergy with other drugs used in mantle cell lymphoma.

The Data Are Consistent With Earlier Presentations. The additional data details broad multi-kinase effects of narazaciclib. Comparisons with the three approved CDK4/6 inhibitors have shown narazaciclib stops cancer cell proliferation by inhibiting more targets and leads to potent, irreversible G1cell cycle blockade. Its side effect profile allows for daily dosing, rather than the 3-week dosing followed by a week of rest to allow recovery.

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