Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 145, Issue -, Pages 1208-1218Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.09.206
Keywords
Organic chromium; Grifola frondosa polysaccharide; Hypoglycemic and hypolipidemic activities; Intestinal microflora; Hepatic mRNA expression
Funding
- Natural Science Foundation of Fujian Province [2019J06013]
- National Natural Science Foundation of China [31601466]
- fund for outstanding young scientific talents of Fujian Agriculture and Forestry University [XJQ201607]
- National Key R&D Program of China [2018YFD0901003]
- China Postdoctoral Science Foundation [2016T90591]
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Polysaccharide from Grifola frondosa is an excellent metal-ion chelating agent owing to its distinctive structure and outstanding functional activities. Our previous research has successfully synthesized novel organic chromium derived from the chelation of G. frondosa polysaccharide-chromium (III) [GFP-Cr(III)]. The purpose of present research was to reveal the hypoglycemic and hypolipidemic mechanism of GFP-Cr (III), and its relationship with the modulation of intestinal microflora. Successful fabrication of GFP-Cr(III) was verified by thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and H-1 NMR spectrum. The hypoglycemic and hypolipidemic effects were examined using type 2 diabetic mice induced by a high-fat diet (HFD) and streptozocin (STZ). Results indicated that GFP-Cr(III) intervention improved abnormal serum biochemical indicators (triglyceride (TG), cholesterol (TC), low-density lipoprotein cholesterol (LDL-C) and glucose), inhibited lipid accumulation and steatosis in the liver. Metagenomic analysis revealed that GFP-Cr(III) treatment produced obvious changes on the intestinal microflora in T2DM mice. The correlation network analysis further revealed that the serum and hepatic lipid profiles were positively correlated with Streptococcus and Enterococcus, but negatively correlated with Enterorhabdus, Ruminococcaceae-UCG-011, Coriobacteriaceae and Micrococcaceae. Meanwhile, oral administration with GFP-Cr(III) regulated the mRNA expression related to glucose and lipid metabolism. These results of present study suggest that GFP-Cr(III) could be used as potential functional food ingredients for the amelioration of hyperglycemia and hyperlipidemia. (C) 2019 Elsevier B.V. All rights reserved.
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