期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 57, 期 1, 页码 366-375出版社
ELSEVIER
DOI: 10.1016/j.lwt.2014.01.002
关键词
Indigenous fruits; Davidsonia pruriens; Santalum acuminatum; Polyphenols; Enzyme inhibitory activity
资金
- Rural Industries Research and Development Corporation (RIRDC), Australia
- Rajamangala University of Technology Isan (RMUTI), Thailand
Davidson's plum (DP; Davidsonia pruriens, E Muell, Cunoniaceae) and quandong (QD; Santalum acuminatum, A.D.C., Santalaceae) are two leading commercially grown native Australian fruits used in a variety of food products such as jam, chutney, sauces, wine or herbal teas. Within this study their inhibitory activities towards key enzymes relevant to metabolic syndrome: alpha-glucosidase, pancreatic lipase and angiotensin I-converting enzyme were evaluated and compared to these of reference samples: rabbit eye (REB, Vaccinium ashei J.M. Reade) and southern highbush (SHB, Vaccinium darrowii x Vaccinium corymbosum) blueberries. Polyphenolic-rich fraction obtained from DP comprised ellagic acid and ellagi-tannins accompanied by flavonoids: myricetin, quercetin, rutin, and anthocyanins. This fraction contained the highest level of total phenolics and exhibited superior antioxidant capacity (Ferric Reducing Antioxidant Power, FRAP and Oxygen Radical Absorbance Capacity, ORAC) to polyphenolic-rich fractions of QD, REB and SHB. DP closely followed REB and SHB in their inhibitory activities against isolated alpha-glucosidase (IC50 of 0.13; 0.097 and 0.091, respectively) and was the most efficient inhibitor of angiotensin converting-enzyme (ACE; 91.2% inhibition at extract concentration of 1 mg/mL). Polyphenolic-rich fraction of QD comprising hydroxycinnamic acids, quercetin and cyanidin 3-glucoside was the most effective inhibitor of pancreatic lipase (IC50: 0.60 mg/mL). (C) 2014 Elsevier Ltd. All rights reserved.
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