广东省农业科学院机构知识库

Phytochemical Profile, Bioactivity, and Prebiotic Potential of Bound Phenolics Released from Rice Bran Dietary Fiber during in Vitro Gastrointestinal Digestion and Colonic Fermentation

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文献类型：外文期刊

作者： Zhang, Xinwen ¹ ; Zhang, Mingwei ¹ ; Dong, Lihong ² ; Jia, Xuchao ² ; Liu, Lei ² ; Ma, Yongxuan ² ; Huang, Fei ² ; Zhang, ¹ ;

作者机构： 1.Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan 430070, Hubei, Peoples R China

2.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Guangzhou 510610, Guangdong, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Funct Foods, Guangzhou 510610, Guangdong, Peoples R China

4.Guangdong Key Lab Agr Prod Proc, Guangzhou 510610, Guangdong, Peoples R China

关键词： rice bran dietary fiber; bound phenolics; in vitro digestion; colonic fermentation; prebiotic effect

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （影响因子：5.279；五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2019 年 67 卷 46 期

页码：

收录情况： SCI

摘要： Whole-grain dietary fiber is rich in bound-form phenolics, and the biological activity of this special structural feature has attracted increasing attention. In this study, rice bran dietary fiber (RBDF) was subjected to in vitro gastrointestinal digestion and colonic fermentation to investigate the liberation of bound phenolics and their potential activities. Bound phenolics were released at a higher ratio during colonic fermentation (27.57%) than gastrointestinal digestion (2.68%). Nine phenolic compounds were detected from the fermentation supernatants. The released phenolics showed radical scavenging activity (DPPH and ABTS assays) and alpha-glucosidase inhibitory activity (IC50 = 19.11 mu g GAE/mL). Compared with phenolics-removed RBDF (PR-RBDF), RBDF had a significantly stronger prebiotic effect on the microbes associated with diabetes (Lactobacillus spp., Akkermansia muciniphila, and Faecalibacterium prausnitzii). These findings indicate that bound phenolics may act as important functional components that could contribute to the health benefits of whole-grain dietary fiber.

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