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• W2049335890 abstract "This work reports the in vitro antioxidant and inhibitory activities of hexane, methanol and water extracts of cork oak (Quercus suber) against acetylcholinesterase (AChE), butyrylcholinesterase (BuChE), α-amylase and α-glucosidase. The total content of phenolics (TPC), tannins (TTC) and flavonoids (TFC), and the HPLC profile of the main phenolic compounds present in the extracts, were also determined. In the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay the best results were obtained with the methanol and water extracts from both leaves and acorns (41–49%). In the 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) method the highest activity was observed with the methanol and leaf water extracts (63–71%). The most significant effects on cholinesterase activity were obtained with the methanol leaf extract at the concentration of 1 mg/mL, yielding inhibition values of 79 and 80% on AChE and BuChE, respectively. No relevant activity was detected against α-amylase, but samples significantly inhibited α-glucosidase from baker's yeast, and the best results were obtained with the water and methanol leaf extracts with values of 97 and 89%, respectively, higher than the positive controls used (acarbose and glucobay). The methanol leaf extract had the highest TPC (211 mg GAE/g, DW) and TFC (8.2 mg RE/g, DW), whereas the water extracts had the highest tannin levels (87 CE/g, DW). The main compound in the methanol leaf extract was gentisic acid (24.3 mg/g, DW). Our results suggest that leaves and acorns from cork oak contain compounds useful for alleviating symptoms associated with Alzheimer disease and other neurodegenerative ailments as well as diabetes." @default.
• W2049335890 created "2016-06-24" @default.
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• W2049335890 date "2015-02-01" @default.
• W2049335890 modified "2023-10-15" @default.
• W2049335890 title "Phenolic composition, antioxidant potential and in vitro inhibitory activity of leaves and acorns of Quercus suber on key enzymes relevant for hyperglycemia and Alzheimer's disease" @default.
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• W2049335890 doi "https://doi.org/10.1016/j.indcrop.2014.11.001" @default.
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