4.7 Article

Targeting proteases involved in the viral replication of SARS-CoV-2 by sesquiterpene lactones from chicory (Cichorium intybus L.)

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FOOD & FUNCTION
卷 13, 期 17, 页码 8977-8988

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d2fo00933a

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  1. EU [H2020-NMBP-BIO-2017, 760891]

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This study for the first time identified the potential inhibitory activity of chicory extract against SARS-CoV-2 main protease and papain-like protease. Four sesquiterpene lactones found in chicory were shown to effectively bind to the active sites of these proteases. This provides new insights for further drug development or food-based strategies to prevent SARS-CoV-2 by targeting viral proteases.
SARS-CoV-2 is a highly transmissible and pathogenic coronavirus causing a respiratory disease that emerged in 2019, leading to a public health emergency situation which continues to date. The treatment options are still very limited and vaccines available are less effective against new variants. SARS-CoV-2 enzymes, namely main protease (Mpro) and papain-like protease (PLpro), play a pivotal role in the viral life cycle, making them a putative drug target. Here, we described for the first time the potential inhibitory activity of chicory extract against both proteases. Besides, we have identified that the four most abundant sesquiterpene lactones in chicory inhibited these proteases, showing an effective binding in the active sites of Mpro and PLpro. This paper provides new insight for further drug development or food-based strategies for the prevention of SARS-CoV-2 by targeting viral proteases.

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