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Tang G, Wang W, Wang X, Ding K, Ngan SC, Chen JY, Sze SK, Gao L, Yuan P, Lu X, Yao SQ. Cell-active, irreversible covalent inhibitors that selectively target the catalytic lysine of EGFR by using fluorosulfate-based SuFEx chemistry. Eur J Med Chem 2023; 259:115671. [PMID: 37499291 DOI: 10.1016/j.ejmech.2023.115671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/09/2023] [Accepted: 07/19/2023] [Indexed: 07/29/2023]
Abstract
EGFR signaling is involved in multiple cellular processes including cell proliferation, differentiation and development, making this protein kinase one of the most valuable drug targets for the treatment of non-small cell lung carcinomas (NSCLC). Herein, we describe the design and synthesis of a series of potential covalent inhibitors targeting the catalytically conserved lysine (K745) of EGFR on the basis of Erlotinib, an FDA-approved first-generation EGFR drug. Different amine-reactive electrophiles were introduced at positions on the Erlotinib scaffold proximal to K745 in EGFR. The optimized compound 26 (as well as its close analog 30), possessing a novel arylfluorosulfate group (ArOSO2F), showed excellent in vitro potency (as low as 0.19 nM in independent IC50 determination) and selectivity against EGFR and many of its drug-resistant mutants. Both intact protein mass spectrometry (MS) and site-mapping analysis revealed that compound 26 covalently bound to EGFR at K745 through the formation of a sulfamate. In addition, compound 26 displayed good anti-proliferative potency against EGFR-overexpressing HCC827 cells by inhibiting endogenous EGFR autophosphorylation. The pharmacokinetic studies of compound 26 demonstrated the druggable potential of other ArOSO2F-containing compounds. Finally, competitive activity-based protein profiling (ABPP), cellular thermal shift assay (CETSA), as well as cellular wash-out experiments, all showed compound 26 to be the first cell-active, fluorosulfate-based targeted covalent inhibitor (TCI) of protein kinases capable of covalently engaging the catalytically conserved lysine of its target in live mammalian cells.
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Affiliation(s)
- Guanghui Tang
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Wei Wang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518000, China
| | - Xuan Wang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518000, China
| | - Ke Ding
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Discovery of Chinese Ministry of Education (MOE), Guangzhou City Key Laboratory of Precision Chemical Drug Development, School of Pharmacy, Jinan University, Guangzhou, 510632, China; State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - SoFong Cam Ngan
- Department of Health Sciences, Faculty of Applied Health Sciences, Brock University, St. Catharines, Ontario, L2S 3A1, Canada
| | - Jiao-Yu Chen
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518000, China
| | - Siu Kwan Sze
- Department of Health Sciences, Faculty of Applied Health Sciences, Brock University, St. Catharines, Ontario, L2S 3A1, Canada
| | - Liqian Gao
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518000, China
| | - Peiyan Yuan
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518000, China.
| | - Xiaoyun Lu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Discovery of Chinese Ministry of Education (MOE), Guangzhou City Key Laboratory of Precision Chemical Drug Development, School of Pharmacy, Jinan University, Guangzhou, 510632, China.
| | - Shao Q Yao
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore.
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