Novel Antioxidant and Hypoglycemic Water-Soluble Polysaccharides from Jasmine Tea

文献类型： 外文期刊

第一作者： Tang, Yayuan

作者： Tang, Yayuan;Sheng, Jinfeng;He, Xuemei;Wei, Zhen;Liu, Guoming;Li, Changbao;Lin, Bo;Li, Li;Tang, Yayuan;Sheng, Jinfeng;He, Xuemei;Wei, Zhen;Liu, Guoming;Li, Changbao;Lin, Bo;Li, Li;Sun, Jian

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关键词：

Jasminum sambac (L.) Aiton tea

; polysaccharides; antioxidant capacity; anti-hyperglycemic activity; structural analysis

期刊名称：FOODS （ 影响因子：4.35； 五年影响因子：4.957 ）

ISSN：

年卷期： 2021 年 10 卷 10 期

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收录情况： SCI

摘要： There have been few studies dealing with chemical elucidation and pharmacological potentials of water-soluble polysaccharides from jasmine tea, limiting their use in functional foods. In this study, water-soluble polysaccharides (named as JSP) were extracted from Jasminum sambac (L.) Aiton tea and fractionated to afford two sub-fractions (JSP-1 and JSP-2). The main structural characteristics of novel JSP sub-fractions were determined by high performance gel permeation chromatography, ultra-performance liquid chromatography-tandem mass spectrometry, Fourier transform infrared, and nuclear magnetic resonance analysis. Physiologically, the abilities of JSP-1 and JSP-2 to reduce ferric ions, scavenge DPPH and hydroxyl radicals, as well as protect islet cells were confirmed in vitro. JSP-1 exhibited better antioxidant and hypoglycemic activities than JSP-2. The molecular weights of JSP-1 and JSP-2 were 18.4 kDa and 14.1 kDa, respectively. JSP-1 was made up of glucose, galactose, rhamnose, xylose, arabinose, and galacturonic acid with molar ratios 1.14:4.69:1.00:9.92:13.79:4.09, whereas JSP-2 with a triple helical structure was composed of galactose, rhamnose, xylose, arabinose, and galacturonic acid as 3.80:1.00:8.27:11.85:5.05 of molar ratios. JSP-1 contains & RARR;1)-alpha-Gal & INT;-(3 & RARR;, & RARR;1)-alpha-Gal & INT;-(2 & RARR;, & RARR;1)-alpha-Ara & INT;-(5 & RARR;, & RARR;1)-alpha-Ara & INT;-(3 & RARR;, & RARR;1)-alpha-Ara & INT;-(3,5 & RARR;, & RARR;1)-beta-Xylp-(2 & RARR; and & RARR;1)-beta-Xylp-(3 & RARR; residues in the backbone. These results open up new pharmacological prospects for the water-soluble polysaccharides extracted from jasmine tea.

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