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  2. In vivo efficacy studies of novel quinazoline derivatives as irreversible dual EGFR/HER2 inhibitors, in lung cancer xenografts (NCI-H1975) mice models

In vivo efficacy studies of novel quinazoline derivatives as irreversible dual EGFR/HER2 inhibitors, in lung cancer xenografts (NCI-H1975) mice models

  • Bioorg Chem. 2020 Jun;99:103790. doi: 10.1016/j.bioorg.2020.103790.
Debasis Das 1 Lingzhi Xie 2 Jingbing Wang 2 Jingli Shi 2 Jian Hong 3
Affiliations

Affiliations

  • 1 Discovery Chemistry Research, Arromax Pharmatech Co. Ltd., Sangtian Island Innovation Park, No. 1 Huayun Road, Suzhou 215123, PR China. Electronic address: debasis.das@arromax.com.
  • 2 Discovery Chemistry Research, Arromax Pharmatech Co. Ltd., Sangtian Island Innovation Park, No. 1 Huayun Road, Suzhou 215123, PR China.
  • 3 Discovery Chemistry Research, Arromax Pharmatech Co. Ltd., Sangtian Island Innovation Park, No. 1 Huayun Road, Suzhou 215123, PR China. Electronic address: eric.hong@arromax.com.
Abstract

Lung Cancer is the most common Cancer and leading cause of cancer-related deaths worldwide. The first-generation reversible, ATP-competitive inhibitors gefetinib and elotinib showed good clinical responses in lung adenocarcinoma tumors (NSCLC). But almost all patients developed resistance to these inhibitors over time. Such resistance of EGFR inhibitors was frequently linked to the acquired L858R and T790M point mutations in the kinase domain of EGFR. To overcome these resistance problems, the second and the third generation inhibitors have been discovered. FDA approved afatinib, the second generation irreversible inhibitor and osimitinib, the third generation irreversible EGFR inhibitors for the treatments of NSCLC. We identified new covalent quinazoline inhibitors (E)-N-(4-(3-chloro-4-fluorophenylamino)-7-(2-ethoxyethoxy)quinazolin-6-yl)-4-(dimethylamino)but-2-enamide (6d) and (E)-N-(4-(3-chloro-4-(pyridin-2-ylmethoxy)phenylamino)-7-(2-ethoxyethoxy)quinazolin-6-yl)-4-(dimethyl-amino)but-2-enamide (6h) that exhibited potent EGFR kinase inhibitory activities on L858R and T790M mutations. The compound 6 h showed selectivity similar to AZD9291 (osimertinib) in mutated and wild type tumor cell lines. In vitro cell assay 6d and 6h were better than afatinib and osimertinib. In vivo antitumor efficacy studies of these compounds were done in NCI-H1975 mice xenografts.

Keywords

EGFR; HER2; Lung cancer; NCI-H1975; NSCLC; Xenograft.

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