Naturally Available Flavonoid Aglycones as Potential Antiviral Drug Candidates against SARS-CoV-2
Flavonoids are important secondary plant metabolites that have been studied for a long time for their therapeutic potential in inflammatory diseases because of their cytokine-modulatory effects. Five flavonoid aglycones were isolated and identified from the hydrolyzed aqueous methanol extracts of &l...
Guardado en:
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/ad871ed4d1994396b153c92dfbb243bb |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | Flavonoids are important secondary plant metabolites that have been studied for a long time for their therapeutic potential in inflammatory diseases because of their cytokine-modulatory effects. Five flavonoid aglycones were isolated and identified from the hydrolyzed aqueous methanol extracts of <i>Anastatica hierochuntica</i> L., <i>Citrus reticulata</i> Blanco, and <i>Kickxia aegyptiaca</i> (L.) Nabelek. They were identified as taxifolin (<b>1</b>), pectolinarigenin (<b>2</b>), tangeretin (<b>3</b>), gardenin B (<b>4</b>), and hispidulin (<b>5</b>). These structures were elucidated based on chromatographic and spectral analysis. In this study, molecular docking studies were carried out for the isolated and identified compounds against SARS-CoV-2 main protease (Mpro) compared to the co-crystallized inhibitor of SARS-CoV-2 Mpro (α-ketoamide inhibitor (<b>KI</b>), IC<sub>50</sub> = 66.72 µg/mL) as a reference standard. Moreover, <i>in vitro</i> screening against SARS-CoV-2 was evaluated. Compounds <b>2</b> and <b>3</b> showed the highest virus inhibition with IC<sub>50</sub> 12.4 and 2.5 µg/mL, respectively. Our findings recommend further advanced <i>in vitro</i> and <i>in vivo</i> studies of the examined isolated flavonoids, especially pectolinarigenin (<b>2</b>), tangeretin (<b>3</b>), and gardenin B (<b>4</b>), either alone or in combination with each other to identify a promising lead to target SARS-CoV-2 effectively. This is the first report of the activity of these compounds against SARS-CoV-2. |
|---|