Abstract
The contents of total phenol and flavonoid of 27 edible plants as well as their antioxidative and digestive enzymes inhibitory activities were evaluated. The total phenol content of the 27 plants ranged from 1.28-46.80 mg gallic acid equivalent/g. DPPH, ABTS and reducing power assay explored that Rubus idaeus Linn, Hibiscus sabdariffa Linn. and Crataegus pinnatifida Bge. exhibited stronger antioxidant capacity among the 27 plants. 4 plants showed inhibitory percentage more than 50% on pancreatic lipase. 10 plants showed inhibitory percentage more than 50% on α-glucosidase. 3 plants simultaneously possess significant inhibitory activities on pancreatic lipase and α-glucosidase, which were Alpinia officinarum Hance, Ginkgo biloba Linn. leaves and Vitis vinifera Linn. Seeds. Strong positive correlation between total phenol content and antioxidative capacity were found. However, digestive enzymes inhibitory activity was less correlated with total phenol and total flavonoids content.
Highlights
Plant-based food is an important part of the human diet
The anti-obesity effects of some natural extracts were explored in vivo studies, for instance, tea extract (Lu et al, 2019), mulberry extract (Peng et al, 2011), Microalga Nitzschia laevis extract (Guo et al, 2019), etc
Porcine pancreatic lipase was purchased from Yuanye Bio-Technology Co., Ltd. (Shanghai, China)
Summary
Plant-based food is an important part of the human diet. Carbohydrate, vitamins and minerals, plants contain many secondary metabolites (e.g. polyphenols, saponins, etc) which exhibit many physiological activities in vivo (Crozier et al, 2009). Polyphenols, flavonoids, play important role in these protective effects (Crozier et al, 2009). Edible plants with digestive enzymes inhibitory activity are promising resource for obesity prevention without side-effects (Fu et al, 2016). Obesity usually lead to the imbalance of oxidation-antioxidant system in the body. Antioxidants in body defense system play a crucial role in preventing the accumulation of ROS. Searching for medicinal and/or edible plants with strong digestive enzymes inhibitory and antioxidative activities has gained increasing attention (Nowicka et al, 2018; Buchholz & Melzig, 2016). The anti-obesity effects of some natural extracts were explored in vivo studies, for instance, tea extract (Lu et al, 2019), mulberry extract (Peng et al, 2011), Microalga Nitzschia laevis extract (Guo et al, 2019), etc
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