Protective effects of Bacillus probiotics against high-fat diet-induced metabolic disorders in mice

被引:68
作者
Kim, Bobae [1 ,2 ]
Kwon, Jeonghyeon [1 ]
Kim, Min-Seok [1 ]
Park, Haryung [2 ]
Ji, Yosep [2 ,3 ]
Holzapfel, Wilhelm [2 ,3 ]
Hyun, Chang-Kee [1 ,2 ]
机构
[1] Handong Global Univ, Sch Life Sci, Pohang, Gyungbuk, South Korea
[2] Handong Global Univ, Dept Adv Green Energy & Environm AGEE, Pohang, Gyungbuk, South Korea
[3] HEM, Pohang, Gyungbuk, South Korea
关键词
GUT MICROBIOTA; INSULIN-RESISTANCE; LIVER-DISEASE; OBESITY; ACIDS; AXIS; AMPK;
D O I
10.1371/journal.pone.0210120
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Recently, modulation of gut microbiota by probiotics treatment has been emerged as a promising strategy for treatment of metabolic disorders. Apart from lactic acid bacteria, Bacillus species (Bacillus spp.) have also been paid attention as potential probiotics, but nevertheless, the molecular mechanisms for their protective effect against metabolic dysfunction remain to be elucidated. In this study, we demonstrate that a probiotic mixture composed of 5 different Bacillus spp. protects mice from high-fat diet (HFD)-induced obesity, insulin resistance and non-alcoholic fatty liver disease (NAFLD). Probiotic Bacillus treatment substantially attenuated body weight gain and enhanced glucose tolerance by sensitizing insulin action in skeletal muscle and epididymal adipose tissue (EAT) of HFD-fed mice. Bacillus-treated HFD-fed mice also exhibited significantly suppressed chronic inflammation in the liver, EAT and skeletal muscle, which was observed to be associated with reduced HFD-induced intestinal permeability and enhanced adiponectin production. Additionally, Bacillus treatment significantly reversed HFD-induced hepatic steatosis. In Bacillus-treated mice, hepatic expression of lipid oxidative genes was significantly increased, and lipid accumulation in subcutaneous and mesenteric adipose tissues were significantly decreased, commensurate with down-regulated expression of genes involved in lipid uptake and lipogenesis. Although, in Bacillus-treated mice, significant alterations in gut microbiota composition was not observed, the enhanced expression of tight junction-associated proteins showed a possibility of improving gut barrier function by Bacillus treatment. Our findings provide possible explanations how Bacillus probiotics protect diet-induced obese mice against metabolic disorders, identifying the treatment of probiotic Bacillus as a potential therapeutic approach.
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页数:17
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