期刊
FOOD BIOSCIENCE
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fbio.2019.100506
关键词
Auricularia polytricha; Dietary fiber; Constipation-relieving activity; Gastrointestinal hormone
资金
- Natural Science Foundation of Shandong Province [ZR2018LC018]
- Key Research and Development Plan of Shandong Province [2017GNC13106]
- Modern Agricultural Industry Technology System of Shandong Province [SDAIT-07-08]
- Key Basic Research Project of Provincial Natural Science Foundation of Shandong [ZR2018ZC0944]
Auricularia polytricha-derived dietary fiber (DF) is a bio-active health-promoting compound, but limited work has been done on optimization of extraction and constipation-relieving activity. In this study, an enzymatic-chemical method to extract DF was optimized, and the results showed that optimal extraction conditions were ratio of water to A. polytricha powder 41 ml/g, 0.4% a-amylase, 1.0% protamex, and enzymolysis at 66 degrees C, with DF extraction rate of 56 +/- 3%. Then, the constipation-relieving activity of DF was evaluated with a constipated rat model. Sprague - Dawley specific pathogen free rats were randomly divided into 6 groups, namely normal, model, Maren boluses treatment, and three DF treatment groups. Constipated rats fed with 5% A. polytricha-derived DF in place of part of the standard diet resulted in increased wet weight of feces and intestinal propulsive rate, which was associated with the functional properties of DF, including high swelling capacity, water binding capacity, fat adsorption capacity, and glucose adsorption capacity. Moreover, A. polytricha-derived DF had a positive effect on gastrointestinal hormones in rats. The results indicated that the enzymatic-chemical extraction method is effective for extracting DF from A. polytricha and the DF has high constipation-relieving activity.
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