9gc6

Highly optimized CNS penetrant inhibitors of EGFR Exon20 Insertion Mutations

spinqualitylabelsall models 9gc6, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9gc6 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.901Å Ligands: A1IZ9 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease EGFR_HUMAN Defects in EGFR are associated with lung cancer (LNCR) [MIM:211980. LNCR is a common malignancy affecting tissues of the lung. The most common form of lung cancer is non-small cell lung cancer (NSCLC) that can be divided into 3 major histologic subtypes: squamous cell carcinoma, adenocarcinoma, and large cell lung cancer. NSCLC is often diagnosed at an advanced stage and has a poor prognosis. Function EGFR_HUMAN Receptor tyrosine kinase binding ligands of the EGF family and activating several signaling cascades to convert extracellular cues into appropriate cellular responses. Known ligands include EGF, TGFA/TGF-alpha, amphiregulin, epigen/EPGN, BTC/betacellulin, epiregulin/EREG and HBEGF/heparin-binding EGF. Ligand binding triggers receptor homo- and/or heterodimerization and autophosphorylation on key cytoplasmic residues. The phosphorylated receptor recruits adapter proteins like GRB2 which in turn activates complex downstream signaling cascades. Activates at least 4 major downstream signaling cascades including the RAS-RAF-MEK-ERK, PI3 kinase-AKT, PLCgamma-PKC and STATs modules. May also activate the NF-kappa-B signaling cascade. Also directly phosphorylates other proteins like RGS16, activating its GTPase activity and probably coupling the EGF receptor signaling to the G protein-coupled receptor signaling. Also phosphorylates MUC1 and increases its interaction with SRC and CTNNB1/beta-catenin. Isoform 2 may act as an antagonist of EGF action. Publication Abstract from PubMed Despite recent advances in the inhibition of EGFR (epidermal growth factor receptor), there remains a clinical need for new EGFR Exon20 insertion (Ex20Ins) inhibitors that spare EGFR WT. Herein, we report the discovery and optimization of two chemical series leading to ether 23 and biaryl 36 as potent, selective, and brain-penetrant inhibitors of Ex20Ins mutants. Building on our earlier discovery of alkyne 5 which allowed access to CNS property space for an Ex20Ins inhibitor, we utilized structure-based design to move to lower lipophilicity and lower CL(int) compounds while maintaining a WT selectivity margin. During optimization, aldehyde oxidase (AO) metabolism was identified as a human clearance risk, and through SAR exploration, lower AO metabolism was achieved. Potency and WT margin were optimized across a range of Ex20Ins mutants including the potential acquired resistance T790M mutant and efficacy demonstrated in an LXF2478 Ex20Ins ASV model with margin to EGFR WT in vivo. Highly Optimized CNS Penetrant Inhibitors of EGFR Exon20 Insertion Mutations.,McCoull W, Thomson C, Braybrooke E, Chan C, Colclough N, Cortes Gonzalez MA, Cosulich S, Davies NL, Floc'h N, Greenwood R, Hargreaves D, Huang P, Hunt TA, Johnson T, Johnstrom P, Kettle JG, Kondrashov M, Kostomiris DH, Li S, Lister A, Martin S, McKerrecher D, McLean N, Nissink JWM, Orme JP, Orwig P, Packer MJ, Pearson S, Qin L, Felisberto-Rodrigues C, Savoca A, Schou M, Stokes S, Swaih AM, Talbot S, Tucker MJ, Ward RA, Wadforth E, Wang C, Wilson J, Yang Y J Med Chem. 2025 Jan 27. doi: 10.1021/acs.jmedchem.4c02811. PMID:39869768 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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