谷物膳食纤维——戊聚糖与肠道菌群调节研究进展

摘要/Abstract

摘要： 流行病学研究表明，谷物膳食纤维对慢性代谢性疾病，如肥胖、Ⅱ型糖尿病、心脑血管疾病以及结肠癌等具有预防作用。戊聚糖又称为阿拉伯木聚糖，是谷物膳食纤维的主要组成部分。戊聚糖在结肠部位被特定的具有戊聚糖水解酶的细菌所降解，能够增殖肠道中的双歧杆菌和乳杆菌等有益菌。不同程度的聚合度、取代度、交联度以及侧链的分布均会影响戊聚糖的益生特性。戊聚糖所具有的生理功效不仅取决于多糖分子，还源于与其相连的阿魏酸在肠道中缓慢而持续的释放和吸收，并发挥其抗氧化功能。

关键词: 膳食纤维, 谷物, 戊聚糖, 阿魏酸, 肠道菌群

Abstract: Epidemiological studies indicate that cereal dietary fiber (DF) has physiological effects by reducing the risk of many chronic metabolic diseases such as cardiovascular diseases, obesity, type Ⅱ diabetes and some gastrointestinal cancers. Pentosans, also known as arabinoxylans (AX), are the major part of dietary fiber in many cereals. They can be degraded in the colon by specific intestinal bacteria possessing AX-degrading enzymes, and promote the growth of bifidobacteria and lactobacilli in the gut. The prebiotic properties of pentosans are mainly affected by various degrees of polymerization, substitution, and cross-linking as well as side chain distribution. The beneficial effects of pentosans are attributed to bound ferulic acid besides their own molecular structures, which has a slow and continuous release and absorption through the colon to provide important antioxidant protection.

Key words: dietary fiber, cereal, pentosans, ferulic acid, gut microflora

中图分类号:

孙元琳1，陕方2，赵立平3. 谷物膳食纤维——戊聚糖与肠道菌群调节研究进展[J]. 食品科学, 0, (): 326-330.

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