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Anti-Cancer Agents in Medicinal Chemistry

Editor-in-Chief

ISSN (Print): 1871-5206
ISSN (Online): 1875-5992

Research Article

Evaluation of Benzamide-Chalcone Derivatives as EGFR/CDK2 Inhibitor: Synthesis, In-Vitro Inhibition, and Molecular Modeling Studies

Author(s): Akshada Joshi, Heena Bhojwani, Ojas Wagal, Khushboo Begwani, Urmila Joshi*, Sadhana Sathaye and Divya Kanchan

Volume 22, Issue 2, 2022

Published on: 15 April, 2021

Page: [328 - 343] Pages: 16

DOI: 10.2174/1871520621666210415091359

Price: $65

Abstract

Background: EGFR (Epidermal Growth Factor Receptor) and CDK2 (Cyclin Dependent Kinase 2) are important targets in the treatment of many solid tumors and different ligands of these receptors share many common structural features.

Objective: The study involved the synthesis of benzamide-substituted chalcones and determination of their antiproliferative activity as well as a preliminary evaluation of EGFR and CDK2 inhibitory potential using both receptor binding and computational methods.

Methods: We synthesized 13 benzamide-substituted chalcone derivatives and tested their antiproliferative activity against MCF-7, HT-29 and U373MG cell lines using Sulforhodamine B Assay. Four compounds were examined for activity against EGFR and CDK2 kinase. The compounds were docked into both EGFR and CDK2 using Glide software. The stability of the interactions for the most active compound was evaluated by Molecular Dynamics Simulation using Desmond software. Molecular docking studies on mutant EGFR (T790M, T790M/L858R, and T790M/C797S) were also carried out.

Results: From the SRB assay, we concluded that compounds 1g, and 1k were effective in inhibiting the growth of the MCF-7 cell line whereas the other compounds were moderately active. Most compounds were either moderately active or inactive on U373 MG and HT-29 cell lines. Compounds 1g and 1k showed good inhibitory activity against CDK2 kinase while 1d and 1f were moderately active. Compounds 1d, 1f, 1g, and 1k were moderately active against EGFR kinase. Molecular docking reveals the involvement of one hydrogen bond with Met793 in binding with EGFR; however, it was not stable during the simulation and these compounds bind to the receptor mainly via hydrophobic contacts. This fact also points towards a different orientation of the inhibitor within the active site of EGFR kinase. Binding mode analysis for CDK2 inhibition studies indicates that hydrogen bonding interactions with Lys 33 and Leu83 are important for the activity. These interactions were found to be stable throughout the simulation. Considering the results for wild-type EGFR inhibition, the docking studies on mutants were performed and which indicate that the compounds bind to the mutant EGFR but the amino acid residues involved are similar to the wild-type EGFR, and therefore, the selectivity seems to be limited.

Conclusion: These benzamide-substituted chalcone derivatives will be useful as lead molecules for the further development of newer inhibitors of EGFR and/or CDK2 kinases.

Keywords: Chalcones, SRB assay, EGFR inhibition, CDK2 inhibition, molecular docking, molecular dynamics simulation.

Graphical Abstract

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