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Dietary α‐cyclodextrin modifies gut microbiota and reduces fat accumulation in high‐fat‐diet‐fed obese mice
Author(s) -
Nihei Nanako,
Okamoto Hinako,
Furune Takahiro,
Ikuta Naoko,
Sasaki Kengo,
Rimbach Gerald,
Yoshikawa Yutaka,
Terao Keiji
Publication year - 2018
Publication title -
biofactors
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 94
eISSN - 1872-8081
pISSN - 0951-6433
DOI - 10.1002/biof.1429
Subject(s) - gut flora , adipose tissue , lipid metabolism , endocrinology , prebiotic , medicine , bifidobacterium , triglyceride , butyric acid , biology , bacteroides , sterol regulatory element binding protein , bifidobacterium breve , fatty acid synthase , fatty acid , lactobacillus , chemistry , biochemistry , sterol , cholesterol , bacteria , genetics , fermentation
We investigated the effect of α‐cyclodextrin (α‐CD) on the bacterial populations of gut microbiota, production of organic acids, and short‐chain fatty acids (SCFAs), and lipid metabolism in obese mice induced by feeding a high‐fat diet (HFD). Male C57BL/6J mice were assigned to three diet groups: normal diet (ND) (5% [w/w] fat), HFD (35% [w/w] fat), and HFD (35% [w/w] fat) + 5.5% (w/w) α‐CD for 16 weeks. Increases in body and epididymal adipose tissue weights were observed in the HFD group compared with the ND group, which were attenuated in the HFD+α‐CD group. The supplementation of α‐CD increased the total number of bacteria, Bacteroides , Bifidobacterium , and Lactobacillus that were decreased in gut microbiota of mice by feeding the HFD. Importantly, α‐CD administration increased the concentrations of lactic acid and SCFAs, such as acetic, propionic, and butyric acids, and decreased glucose concentrations in cecal contents. Furthermore, supplementation of α‐CD upregulated the gene expression of peroxisome proliferator‐activated receptor (PPAR)γ involved in adipocyte differentiation and PPARα involved in energy expenditure and downregulated that of sterol regulatory element‐binding protein‐1c (SREBP‐1c) and fatty acid synthase involved in fatty acid and triglyceride synthesis in adipose tissue. This study revealed that the alteration in gut microbiota and increased production of lactic acid and SCFAs by supplementation of α‐CD have beneficial antiobesity effects via modulating the expression of genes related to lipid metabolism, indicating a prebiotic property of α‐CD. © 2018 BioFactors, 44(4):336–347, 2018