Isolation, in vitro and in silico Evaluation of Phenylethanoid Glycoside from Arrabidaea brachypoda as Lipoxygenase Inhibitor

Author(s):Show less -

Bertanha, Camila S. ^[1] ; Gimenez, Valeria M. M. ^[1] ; Furtado, Ricardo A. ^[1] ; Tavares, Denise C. ^[1] ; Cunha, Wilson R. ^[1] ; A e Silva, Marcio L. ^[1] ; Januario, Ana H. ^[1] ; Borges, Alexandre ^[2] ; Kawano, Daniel F. ^[2] ; Parreira, Renato L. T. ^[1] ; Pauletti, Patricia M. ^[1]

Affiliation

^[1] Univ Franca UNIFRAN, Nucleo Pesquisa Ciencias Exatas & Tecnol, Av Dr Armando Salles Oliveira 201, BR-14404600 Franca, SP - Brazil

^[2] Univ Estadual Campinas, Unicamp, Fac Ciencias Farmaceut, Rua Candido Portinari 200, BR-13083871 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 31, n. 4, p. 849-855, APR 2020.
• Web of Science Citations: 0

Abstract

Lipoxygenase (LOX) plays an important role in inflammatory processes and Arrabidaea brachypoda (DC.) Bureau (Bignoniaceae) has been described as presenting anti-inflammatory activity. Therefore, the objective of this study was to develop a high-performance liquid chromatography (HPLC) procedure to directly recognize LOX inhibitor compounds in A. brachypoda crude extract, facilitating the isolation, characterization of bioactive compounds, evaluation of natural compounds using an in vitro 15-LOX assay and prediction of the most probable binding modes of their main constituent through molecular docking simulations. The chemical analysis was performed by ethanol crude extract microfractionation using HPLC-DAD (diode array detector) associated to a fraction collector. The bioactive chromatogram displayed a peak with 50.9% LOX inhibition at 13.6 min retention time. The extract was purified and conandroside was isolated, presenting a LOX inhibitory activity with an inhibitory concentration (IC50) of 7.8 ± 1.1 µM, close to standard quercetin (IC50 7.6 ± 0.3 µM). Additionally, conandroside was not cytotoxic to normal cells (GM07492A). The LOX-conandroside complex displayed a slightly higher docking score (92.7) than quercetin (71.5). These results together suggest that conandroside could be explored as lipoxygenase inhibitor. (AU)

• FAPESP's process: 13/09280-6 - Phytochemistry study and evaluation of the cytotoxicity and lipoxygenase inhibitory activity from Cerrado plants
• Grantee: Patricia Mendonça Pauletti
• Support Opportunities: Regular Research Grants