ARRAKI, Kamel; TOTOSON, Perle; DECENDIT, Alain; ZEDET, Andy; MAROILLEY, Justine; BADOC, Alain; DEMOUGEOT, Céline; GIRARD, C.; GIRARD, Corine

doi:10.3390/molecules26061694

DECENDIT, Alain
Unité de Recherche Oenologie [Villenave d'Ornon] [OENO]

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Ce document a été publié dans

Molecules. 2021-03-18, vol. 26, n° 6

Résumé en anglais

Polyphenolic enriched extracts from two species of Cyperus, Cyperus glomeratus and Cyperus thunbergii, possess mammalian arginase inhibitory capacities, with the percentage inhibition ranging from 80% to 95% at 100 µg/mL and 40% to 64% at 10 µg/mL. Phytochemical investigation of these species led to the isolation and identification of two new natural stilbene oligomers named thunbergin A-B (1-2), together with three other stilbenes, trans-resveratrol (3), trans-scirpusin A (4), trans-cyperusphenol A (6), and two flavonoids, aureusidin (5) and luteolin (7), which were isolated for the first time from C. thunbergii and C. glomeratus. Structures were established on the basis of the spectroscopic data from MS and NMR experiments. The arginase inhibitory activity of compounds 1-7 was evaluated through an in vitro arginase inhibitory assay using purified liver bovine arginase. As a result, five compounds (1, 4-7) showed significant inhibition of arginase, with IC50 values between 17.6 and 60.6 µM, in the range of those of the natural arginase inhibitor piceatannol (12.6 µM). In addition, methanolic extract from Cyperus thunbergii exhibited an endothelium and NO-dependent vasorelaxant effect on thoracic aortic rings from rats and improved endothelial dysfunction in an adjuvant-induced arthritis rat model.< Réduire

Mots clés en anglais

Cyperus thunbergii

Cyperus glomeratus

Arginase inhibitors

Vasorelaxante activity

Stilbenes

Flavonoids

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https://oskar-bordeaux.fr/handle/20.500.12278/124323

DOI

http://dx.doi.org/10.3390/molecules26061694

Unités de recherche

Oenologie - UMR 1366

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Mammalian arginase inhibitory activity of methanolic extracts and isolated compounds from cyperus species

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