Ultrasonic-Assisted Extraction and Gastrointestinal Digestion Characteristics of Polysaccharides Extracted from Mallotus oblongfolius

文献类型： 外文期刊

第一作者： Tan, Gansheng

作者： Tan, Gansheng;Duan, Zhouwei;Xin, Tian;Yang, Ling;Liu, Feng;Xie, Hui;Tan, Gansheng;Xia, Guanghua;Xin, Tian;Duan, Zhouwei;Yang, Ling;Liu, Feng;Xie, Hui

作者机构：

关键词： Mallotus oblongfolius polysaccharides (MOPS); ultrasonic extraction; gastrointestinal digestion; antioxidant properties; hypoglycaemia

期刊名称：FOODS （ 影响因子：4.7； 五年影响因子：5.1 ）

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年卷期： 2024 年 13 卷 12 期

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收录情况： SCI

摘要： The polysaccharides were extracted from the leaves of Mallotus oblongifolius (MO) using an ultrasonic-assisted extraction method in this study. The main variables affecting the yield of polysaccharides extracted from Mallotus appallatus (MOPS) were identified and optimized while concurrently investigating its antioxidant capacity, hypoglycemic activity, and digestive properties. The results indicated that the optimal ultrasound-assisted extraction of MOPS involved an ultrasound power of 200 W, a liquid-to-solid ratio of 25:1 (mL:g), an extraction temperature of 75 degrees C, and an ultrasound time of 45 min, leading to an extraction yield of (7.36 +/- 0.45)% (m/m). The MOPS extract exhibited significant scavenging activity against DPPH and ABTS radicals with IC50 values of (25.65 +/- 0.53) mu g/mL and (100.38 +/- 0.38) mu g/mL, respectively. Furthermore, it effectively inhibited the enzymatic activities of alpha-glucosidase and alpha-amylase with IC50 values of (2.27 +/- 0.07) mg/mL and (0.57 +/- 0.04) mg/mL, respectively. The content of MOPS remained relatively stable in the stomach and small intestine; however, their ability to scavenge DPPH radicals and ABTS radicals and exhibit reducing power was attenuated, and the inhibition of alpha-amylase and alpha-glucosidase activity was diminished. In conclusion, the ultrasonic extraction of MOPS showed feasibility and revealed antioxidant and hypoglycemic effects. However, the activities were significantly reduced after gastric and small intestinal digestion despite no significant change in the MOPS content.

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