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Identification of novel 1,2,3-triazole isatin derivatives as potent SARS-CoV-2 3CLpro inhibitors via click-chemistry-based rapid screening.

ABSTRACT: SARS-CoV-2 3-chymotrypsin-like protease (3CLpro) is considered an attractive target for the development of anti-COVID-19 agents due to its vital function. The N-substituted isatin derivative L-26 is a potential SARS-CoV-2 3CLpro inhibitor, but it has poor cell-based antiviral activity and high cytotoxicity. With L-26 as the lead compound, 58 isatin derivatives were prepared using click-chemistry-based miniaturized synthesis and their 3CLpro inhibitory activities were determined by a fluorescence resonance energy transfer-based enzymatic assay. Compounds D1N8 (IC50 = 0.44 ± 0.12 μM) and D1N52 (IC50 = 0.53 ± 0.21 μM) displayed excellent inhibitory potency against SARS-CoV-2 3CLpro, being equivalent to that of L-26 (IC50 = 0.30 ± 0.14 μM). In addition, the cytotoxicity of D1N8 (CC50 >20 μM) and D1N52 (CC50 >20 μM) decreased significantly compared with L-26 (CC50 <2.6 μM). Further molecular dynamics simulations revealed the potential binding interactions between D1N52 and SARS-CoV-2 3CLpro. These efforts lay a solid foundation for the research of novel anti-SARS-CoV-2 agents targeting 3CLpro.

SUBMITTER: Jiang X 

PROVIDER: S-EPMC10583828 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature

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Identification of novel 1,2,3-triazole isatin derivatives as potent SARS-CoV-2 3CLpro inhibitors <i>via</i> click-chemistry-based rapid screening.

Jiang Xiangyi X   Li Jing J   Viayna Antonio A   Luque F Javier FJ   Woodson Molly M   Jing Lanlan L   Gao Shenghua S   Zhao Fabao F   Xie Minghui M   Toth Karoly K   Tavis John J   Tollefson Ann E AE   Liu Xinyong X   Zhan Peng P  

RSC medicinal chemistry 20230817 10

SARS-CoV-2 3-chymotrypsin-like protease (3CL<sup>pro</sup>) is considered an attractive target for the development of anti-COVID-19 agents due to its vital function. The <i>N</i>-substituted isatin derivative L-26 is a potential SARS-CoV-2 3CL<sup>pro</sup> inhibitor, but it has poor cell-based antiviral activity and high cytotoxicity. With L-26 as the lead compound, 58 isatin derivatives were prepared using click-chemistry-based miniaturized synthesis and their 3CL<sup>pro</sup> inhibitory acti  ...[more]

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