Abstract：
:In this work we evaluated methanolic extracts from different parts (leaves, seeds, fruit peel and pulp) of Chamaerops humilis L. for antioxidant activity and the ability to inhibit enzymes linked with neurodegenerative diseases: acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and tyrosinase (TYR). The total content of phenolics, flavonoids and condensed tannins was also determined. The antioxidant and inhibitory activities of the extracts varied significantly according to the tissue. Seed extracts showed the greatest ability to scavenge DPPH (IC50 = 81.28 µg mL-1) and ABTS (1440.42 µmolTE [Formula: see text]) and to reduce iron (1142.46 µmolAAE [Formula: see text]). Seed and peel extracts strongly inhibited AChE (IC50 = 660.16 and 653.68 µg mL-1, respectively) and BChE (IC50 = 304.86 and 701.54 µg mL-1, respectively). The strongest inhibition of TYR was achieved by the seed and pulp extracts (268.97 and 279.99 µg mL-1, respectively). The highest levels of phenolics and condensed tannins were found in the seed extract (1564.88 µmolGAE [Formula: see text] and 170.00 µmolcE [Formula: see text], respectively) whereas the leaf extract was the richest in flavonoids (139.88 µmolQE [Formula: see text]). HPLC-DAD analysis indicated the presence of flavonoids and phenolic acids (hydroxycinnamic acids) in the leaf and pulp extracts. A high correlation was found between the total condensed tannins content and the antioxidant and enzyme inhibition activities, suggesting these compounds are responsible for the biological activity of the extracts. Overall, our results indicate that C. humilis extracts may provide a new and alternative source of agents for medical and industrial applications.
journal_name
3 Biotechjournal_title
3 Biotechauthors
Gonçalves S,Medronho J,Moreira E,Grosso C,Andrade PB,Valentão P,Romano Adoi
10.1007/s13205-018-1110-9subject
Has Abstractpub_date
2018-02-01 00:00:00pages
88issue
2eissn
2190-572Xissn
2190-5738pii
1110journal_volume
8pub_type
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