Onconova Therapeutics (ONTX) – Two Narazaciclib Studies To Be Presented At AACR Meeting

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Thursday, March 16, 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 two Phase 1 dose-escalation and expansion studies. These trials are currently underway in the United States and China. Onconova’s product candidate rigosertib is being studied in an investigator-sponsored study program, including in a dose-escalation and expansion Phase 1/2a investigator-sponsored study with oral rigosertib in combination with nivolumab for patients with KRAS+ non-small cell lung cancer.

Robert LeBoyer, Vice President, Research Analyst, Life Sciences , Noble Capital Markets, Inc.

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Narazaciclib Data To Be Presented. Onconova announced two narazaciclib studies have been accepted for poster presentations at the American Association for Cancer Research (AACR) meeting to be held April 14-19, 2023. The abstracts for the presentations include preclinical data on narazaciclib targets and activity that show it to have greater potency and/or broader activity than approved drugs in the CDK4/6 inhibitor category.

Models In Mantle Cell Lymphoma. The first study tested narazaciclib alone and in combination with ibrutinib (Imbruvica, AbbVie) in preclinical models of mantle cell lymphoma. Narazaciclib was tested as a single-agent in both ibrutinib-resistant and ibrutinib-sensitive cell lines and showed significant anti-tumor activity. Next, the combination of narazaciclib with ibrutinib was found to synergistic compared with either drug alone in both resistant and sensitive cell lines. The study also tested narazaciclib against approved CDK4/6 inhibitors in mantle cell lymphoma cell lines and found it to be superior to palbociclib (Ibrance, Pfizer) and ribociclib (Kisqali, Novartis) and similar to abemaciclib (Verzenio, Lilly).

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