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The crude guava polysaccharides ameliorate high-fat diet-induced obesity in mice via reshaping gut microbiota.

Authors:
Yuanyuan Li Dongsong Bai Yongming Lu Jia Chen Haoning Yang Yu Mu Jialin Xu Xueshi Huang Liya Li

Int J Biol Macromol 2022 Jul 21;213:234-246. Epub 2022 May 21.

Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110169, PR China. Electronic address:

Guava is a popular fruit consumed worldwide with beneficial effects in regulation of glucose and lipid metabolism. Although polysaccharides are a major phytochemical component of guava, to date, the alleviative effects of polysaccharides from the guava fruit against diet-induced obesity remain unclear. The relationship between the anti-obesity effects of guava polysaccharide (GP) and gut microbiota is unknown. In current study, seven-week-old C57BL/6 mice were fed high-fat diet (HFD) supplemented with GP (100 mg/kg) by oral gavage for 11 weeks. GP supplementation alleviated HFD-induced body weight gain and visceral obesity, and reduced serum cholesterol, triglyceride, and LDL-C levels. In addition, GP ameliorated insulin resistance and prevented hepatic lipid accumulation and meta-inflammation in both liver and adipose tissues in obese mice. Remarkably, GP treatment restored the Firmicutes/Bacteroidetes ratio, induced growth of beneficial bacteria including Clostridium XlVa, Parvibacter, and Enterorhabdus, and decreased in inflammation-related bacteria Mucispirillum in mice fecal samples, accompanied with enhanced production of colonic short chain fatty acids especially butyric acid. However, the metabolic benefits of GP diminished in antibiotics-treated HFD-fed mice. Overall, GP improved metabolic profiles in HFD-induced obese mice via the mediation of gut microbiota-dependent pathways. GP might be developed and utilized as prebiotics in nutraceutical and food industry.

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http://dx.doi.org/10.1016/j.ijbiomac.2022.05.130DOI Listing
July 2022

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