Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 59, Issue 5, Pages 1630-1637Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf103461k
Keywords
Murta (Ugni molinae Turcz.); maqui (Aristotelia chilensis); antioxidant; antihemolytic effect; digestive enzymes inhibitor; polyphenols
Funding
- Conicyt through Fondecyt [1060311]
- GAP
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The objective of this work was to evaluate the antioxidant and antihemolytic activities of crude, aqueous, and organic-aqueous extracts of maqui (Aristotelia chilensis) and murta (Ugni molinae Turcz.), together with their inhibiting effect on enzymes involved in the metabolism of carbohydrates. Radical scavenging activity, inhibition of linoleic acid oxidation in a micellar system, antihemolytic activity, and inhibition of alpha-amylases and alpha-glucosidases were analyzed. Crude extracts of maqui leaves and fruits were found to be important sources of polyphenolic compounds, showing 69.0 +/- 0.9 and 45.7 +/- 1.1 mg GAE/g dm, respectively. Polyphenols from maqui leaves were active as antioxidants and antihemolytic compounds (p < 0.05), showing a noncompetitive inhibiting effect on alpha-glucosidase. Flavan-3-ol polymers and glycosylated flavonols, such as quercetin glucoside and kaempferol glucoside, were tentatively identified in extracts. This preliminary observation provides the basis for further examination of the suitability of polyphenol-enriched extracts from maqui and murta as nutritional or medicinal supplements with potential human health benefits.
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