Olema Pharmaceuticals announced the selection of a development candidate for the Company’s program targeting KAT6, an epigenetic target that is dysregulated in breast cancer and other cancers. The compound, named OP-3136, is an orally bioavailable, potent KAT6A/B-selective inhibitor developed by Olema in collaboration with Aurigene Oncology. Olema presented data regarding the discovery and pre-clinical development of its KAT6 program in a poster session at the 2023 AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics in Boston, Massachusetts. OP-3136 is orally bioavailable in multiple non-clinical species with desirable pharmacokinetics and has demonstrated highly selective and potent activity against KAT6A and KAT6B versus other KAT family members. In KAT6-amplified and overexpressing estrogen receptor-positive breast cancer cell lines, OP-3136 strongly inhibited cell proliferation whereas KAT6-low cell lines were insensitive to the compounds. In a non-clinical xenograft model, OP-3136 caused dose-dependent tumor growth inhibition and tumor regression comparable to or better than a positive-control patented KAT6 inhibitor and demonstrated synergy in combination with CDK4/6 inhibitors or palazestrant. Olema is initiating non-clinical Investigational New Drug enabling studies in order to support a potential IND submission to the U.S. Food and Drug Administration for OP-3136 by the end of 2024.
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