Journal
JOURNAL OF FUNCTIONAL FOODS
Volume 54, Issue -, Pages 64-73Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jff.2019.01.008
Keywords
Murus alba L.; Polysaccharide; Structural; Zinc; Antioxidant; Hypoglycemic
Categories
Funding
- China Postdoctoral Science Foundation [2018M643092]
- National Key RD Program [2017YFD0400703]
- Guangzhou Science Technology and Innovation Commission [201803050001]
- National key research and development program [D2170880]
- Science & Technology Planning Project of Nansha, Guangzhou [2016GJ001]
- 111 Project [B17018]
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A novel polysaccharide (MFP4P) was isolated from mulberry fruits (Morus alba L.) pulp using a combination of DEAE-Sepharose fast-flow and Sephadex G-100 chromatographic columns. Structural characterization revealed that MFP4P was composed of arabinose, rhamnose, galactose, glucose and galacturonic acid with a molecular weight of 198.2 kDa. The linkage types of MFP4P were proved to be (1 -> 6)-linked alpha-D-Glc, (1 -> 2)-linked alpha-LRha, (1 -> 3)-linked alpha-D-Gal, (1 -> 3)-linked beta-L-Rha and (1 -> )-linked alpha-L-Ara. The MFP4P showed good antioxidant activity with an oxygen radical absorbance capacity value of 121.8 +/- 16.5 mu M trolox equivalent/g. In addition, the MFP4P promoted pancreatic cell proliferation, increased insulin secretion, and enhanced glucose consumption. In the non-toxic range, the polysaccharide and zinc complexes (MFP4P-Zn) exhibited higher antioxidant and hypoglycemic activities than MFP4P at the same concentration. In vivo hypoglycemic study, MFP4P and MFP4P-Zn both showed decreased blood glucose level and glucose tolerance compared with the model control group.
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