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Abstract Title:

Fucoidan and galactooligosaccharides ameliorate high-fat diet-induced dyslipidemia in rats by modulating the gut microbiota and bile acid metabolism.

Abstract Source:

Nutrition. 2019 Mar 11 ;65:50-59. Epub 2019 Mar 11. PMID: 31029922

Abstract Author(s):

Qichao Chen, Min Liu, Pengyu Zhang, Shujun Fan, Jinli Huang, Shunying Yu, Caihua Zhang, Huajun Li

Article Affiliation:

Qichao Chen

Abstract:

OBJECTIVES: Dyslipidemia is an important risk factor for cardiovascular diseases. Fucoidan (FUC) is a polysaccharide extracted from brown marine algae with various biological activities. Galactooligosaccharides (GOS) are important prebiotics that exert benefits on the intestinal microbiota. The aim of this study was to investigate the effects of FUC and GOS on dyslipidemia in rats by modulating the gut microbiota and bile acid metabolism.

METHODS: Twenty-four male inbred Sprague-Dawley (SD) rats aged 8 wk were fed a normal or high-fat diet (HFD) for 8 wk. During the feeding period, rats were gavaged with normal saline solution, FUC solution (100 mg/kg),or GOS solution (800 mg/kg), or a combination of both once daily. Serum biochemical parameters were determined, and the gut microbiota were analyzed via 16S rRNA gene sequencing. Bile salt hydrolase (BSH) activity in the small intestinal contents was also analyzed. The effects of FUC and GOS on Lactobacillus casei DM8121 were analyzed in vitro.

RESULTS: In rats, GOS and FUC supplementation significantly improved serum total cholesterol, low-density lipoprotein cholesterol, lipopolysaccharide, serum total bile acid, hepatic tissue steatosis, aortic arch injury, gut microbiota, serum high-density lipoprotein cholesterol, cholesterol 7-alpha hydroxylase expression in the liver, and BSH activity in the small intestinal contents. In an in vitro experiment, GOS and FUC supplementation significantly increased L. casei DM8121's BSH activity.

CONCLUSIONS: In rats, FUC and GOS supplementation improved serum dyslipidemia, gut microbiota, BSH activity, and bile acid metabolism-related pathways. In vitro, GOS and FUC supplementation increased L. casei DM8121's BSH activity.

Study Type : Animal Study

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