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Publication Abstract from PubMed

KRAS is an archetypal high-value intractable oncology drug target. The glycine to cysteine mutation at codon 12 represents an Achilles heel that has now rendered this important GTPase druggable. Herein, we report our structure-based drug design approach that led to the identification of 21, AZD4625, a clinical development candidate for the treatment of KRAS(G12C) positive tumors. Highlights include a quinazoline tethering strategy to lock out a bio-relevant binding conformation and an optimization strategy focused on the reduction of extrahepatic clearance mechanisms seen in preclinical species. Crystallographic analysis was also key in helping to rationalize unusual structure-activity relationship in terms of ring size and enantio-preference. AZD4625 is a highly potent and selective inhibitor of KRAS(G12C) with an anticipated low clearance and high oral bioavailability profile in humans.

Discovery of AZD4625, a Covalent Allosteric Inhibitor of the Mutant GTPase KRAS(G12C).,Kettle JG, Bagal SK, Bickerton S, Bodnarchuk MS, Boyd S, Breed J, Carbajo RJ, Cassar DJ, Chakraborty A, Cosulich S, Cumming I, Davies M, Davies NL, Eatherton A, Evans L, Feron L, Fillery S, Gleave ES, Goldberg FW, Hanson L, Harlfinger S, Howard M, Howells R, Jackson A, Kemmitt P, Lamont G, Lamont S, Lewis HJ, Liu L, Niedbala MJ, Phillips C, Polanski R, Raubo P, Robb G, Robinson DM, Ross S, Sanders MG, Tonge M, Whiteley R, Wilkinson S, Yang J, Zhang W J Med Chem. 2022 Apr 26. doi: 10.1021/acs.jmedchem.2c00369. PMID:35471939^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.