Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 68, Issue 1, Pages 147-159Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.9b06247
Keywords
polysaccharide; hypolipidemic; hypoglycemic; gut microbiota
Funding
- National Natural Science Foundation of China [31801542, 31972022]
- Natural Science Foundation of Guangdong Province [2018A030310383]
- National Joint Research Center of Tropical Health Foods [2017D01005]
- Guangzhou Science Technology and Innovation Commission [201803050001]
- 111 Project [B17018]
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This study was aimed at investigating the hypoglycemic and hypolipidemic effects of a polysaccharide (RTFP) isolated from Rosa roxburghii Tratt fruit on type-2 diabetic db/db mice. The results indicated that the oral administration of RTFP could significantly decrease the body weight, fat, and liver hypertrophy and the levels of fasting blood glucose, serum insulin, and serum lipids of the db/db mice. Histopathological observation showed that RTFP could effectively protect the pancreas, liver, and epididymal fat against damage and dysfunction. Real-time quantitative polymerase chain reaction analysis confirmed that the gene expression levels of peroxisome proliferator-activated receptors-gamma (PPAR-gamma), sterol regulatory elementbinding protein-1 (SREBP-1c), acetyl-CoA carboxylase-1 (ACC-1), fatty acid synthase (FAS), and glucose-6-phosphatase (G6-Pase) were significantly down-regulated in the liver of db/db mice after treatment with RTFP. Moreover, RTFP treatment reversed gut dysbiosis by lowering the Firmicutes-to-Bacteroidetes ratio and enhancing the relative abundances of beneficial bacteria including Bacteroidaceae, Bacteroidaceae S24-7 group, and Lactobacillaceae. These findings suggest that RTFP can be used as a promising functional supplement for the prevention and treatment of type-2 diabetes mellitus.
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