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Santi, M.D.; Paulino Zunini, M.; Vera, B.; Bouzidi, C.; Dumontet, V.; Abin-Carriquiry, A.; Grougnet, R.; Ortega, M.G.
European journal of medicinal chemistry, 01/2018, Letnik: 143Journal Article
Xanthine oxidase (XO), an enzyme widely distributed among mammalian tissues, is associated with the oxidation of xanthine and hypoxanthine to form uric acid. Reactive oxygen species are also released during this process, leading to oxidative damages and to the pathology called gout. Available treatments mainly based on allopurinol cause serious side effects. Natural products such as flavonoids may represent an alternative. Thus, a series of polymethoxyflavones isolated and hemisynthesized from the bud exudates of Gardenia oudiepe has been evaluated for in vitro XO inhibitory activity. Compounds 1, 2 and 3 were more active than the reference inhibitor, Allopurinol (IC50 = 0.25 ± 0.004 μM) with IC50 values of (0.004 ± 0.001) μM, (0.05 ± 0.01) μM and (0.09 ± 0.003) μM, respectively. Structure-activity relationships were established. Additionally, a molecular docking study using MOE™ tool was carried out to establish the binding mode of the most active flavones with the enzyme, showing important interactions with its catalytic residues. These promising results, suggest the use of these compounds as potential leads for the design and development of novel XO inhibitors. Display omitted •Xanthine oxidase inhibitory activity of polymethoxyflavones from Gardenia oudiepe was determinate.•Some compounds were more actives than Allopurinol, with IC50 in the nanomolar range.•SAR and docking studies were determinate for those compounds for the first time.
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