On September 21, 2020 Onconova Therapeutics, Inc. (NASDAQ: ONTX) a biopharmaceutical company focused on discovering and developing novel products to treat cancer, reported the initiation of a Phase 1 clinical trial in China for ON 123300 by its partner, HanX Biopharmaceuticals (Press release, HanX Biopharmaceuticals, SEP 21, 2020, View Source [SID1234565437]).
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In December 2017, Onconova entered into an agreement with HanX Biopharmaceuticals for the development, registration, and commercialization of ON 123300 in China. The agreement included a licensing fee, and future potential milestone payments and royalties on sales. Outside of China, Onconova retains rights in rest of the world.
ON 123300 is a novel small molecule, and a dual inhibitor of CDK4/6 and ARK5, a key enzyme controlling cellular energy homeostasis. Inhibition of ARK5 by ON 123300 results in the collapse of oncogene-altered energy metabolism, leading to programmed cell death. Differentiated from health authority approved CDK4/6 inhibitors, ON 123300 exhibits single agent toxicity against various cancers in preclinical studies including breast cancer, colon cancer, mantle cell lymphoma and multiple myeloma.
"As a proprietary first-in-class anti-cancer agent, ON 123300 is reported to have a unique dual mechanism of action that could improve upon the clinical efficacy of approved CDK4/6 inhibitors and may impact on the development of metastatic disease, while potentially mitigating the commonly observed side effects based on animal studies already conducted," said Steven M. Fruchtman, M.D., President and Chief Executive Officer. "We look forward to filing our US IND by the end of this year and beginning a US Phase 1 study in refractory solid tumors in the first quarter of next year."