scholarly journals The difference of regulatory effect of two Inonotus obliquus extracts on high‐fat diet mice in relation to the fatty acid elongation function of gut microbiota

2020 ◽  
Author(s):  
Jian Yu ◽  
Hongyu Xiang ◽  
Qiuhong Xie
Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 1037
Author(s):  
Mayssa Albouery ◽  
Alexis Bretin ◽  
Bénédicte Buteau ◽  
Stéphane Grégoire ◽  
Lucy Martine ◽  
...  

Diet shapes the gut microbiota which impacts hepatic lipid metabolism. Modifications in liver fat content are associated with metabolic disorders. We investigated the extent of dietary fat and fiber-induced alterations in the composition of gut microbiota and hepatic fatty acids (FAs). Mice were fed a purified low-fat diet (LFD) or high-fat diet (HFD) containing non-soluble fiber cellulose or soluble fiber inulin. HFD induced hepatic decreases in the amounts of C14:0, C16:1n-7, C18:1n-7 and increases in the amounts of C17:0, C20:0, C16:1n-9, C22:5n-3, C20:2n-6, C20:3n-6, and C22:4n-6. When incorporated in a LFD, inulin poorly affected the profile of FAs. However, when incorporated in a HFD, it (i) specifically led to an increase in the amounts of hepatic C18:0, C22:0, total polyunsaturated FAs (PUFAs), total n-6 PUFAs, C18:3n-3, and C18:2n-6, (ii) exacerbated the HFD-induced increase in the amount of C17:0, and (iii) prevented the HFD-induced increases in C16:1n-9 and C20:3n-6. Importantly, the expression/activity of some elongases and desaturases, as well as the gut microbiota composition, were impacted by the dietary fat and fiber content. To conclude, inulin modulated gut microbiota and hepatic fatty acid composition, and further investigations will determine whether a causal relationship exists between these two parameters.


2021 ◽  
Vol 12 ◽  
Author(s):  
Mei Yang ◽  
Yexin Yin ◽  
Fang Wang ◽  
Haihan Zhang ◽  
Xiaokang Ma ◽  
...  

Lycium barbarum polysaccharides (LBPs) have been proved to prevent obesity and modulate gut microbiota. However, the underlying mechanisms of LBPs’ regulating lipid metabolism remain entirely unclear. Therefore, the purpose of this study was to determine whether LBPs are able to modulate the gut microbiota to prevent obesity. The results showed that oral administration of LBPs alleviated dyslipidemia by decreasing the serum levels of total triglycerides, total cholesterol, and low-density lipoprotein-cholesterol and elevating the high-density lipoprotein cholesterol in obese mice. Furthermore, LBP treatment decreased the number and size of adipocytes in epididymal adipose tissues and downregulated the expression of adipogenesis-related genes, including acetyl-CoA carboxylase 1, fatty acid synthase, stearoyl-CoA desaturase 1, sterol regulatory element-binding protein-1c, peroxisome proliferator-activated receptor γ, and CCAAT/enhancer-binding protein α. 16S rRNA gene sequencing analysis showed that LBPs increased the diversity of bacteria, reduced the Firmicutes/Bacteroidetes ratio, and improved the gut dysbiosis induced by a high-fat diet; for example, LBPs increased the production of short-chain fatty acid-producing bacteria Lacticigenium, Lachnospiraceae_NK4A136_group, and Butyricicoccus. LBPs treatment also increased the content of fecal short-chain fatty acids, including butyric acid. These findings illustrate that LBPs might be developed as a potential prebiotic to improve lipid metabolism and intestinal diseases.


2020 ◽  
Vol 4 (Supplement_1) ◽  
Author(s):  
Liyuan Zhou ◽  
Xinhua Xiao ◽  
Qian Zhang ◽  
Ming Li ◽  
Miao Yu

Abstract Background: Early-life overnutrition programs increased risks of metabolic disorders in adulthood. Regular exercise is widely accepted to be an effective measure to maintain metabolic health. However, the transgenerational effects of maternal exercise and the specific mechanism are largely unclear. Aims: Our objective was to investigate whether maternal exercise could alleviate the metabolic disturbances induced by early-life overnutrition in both dams and offspring and to explore the role of gut microbiota-liver axis in mediating the transgenerational metabolic reprogramming. Methods: C57BL/6 females were randomly divided into three groups 3 weeks before mating and during pregnancy: the control group, high-fat group, and high-fat with exercise group (voluntary wheel running training). They received their original diets during lactation. The male offspring had ad libitum access to chow diet from weaning to 24 weeks of age. Glucose tolerance test and serum biochemical parameters were detected. The cecal contents from dams at weaning and 8-week and 24 week of offspring were collected for 16s rDNA sequencing. Hepatic HE staining and transcriptome were performed in adult offspring. Results: The results showed that perinatal high-fat diet resulted in significant glucose intolerance, insulin resistance and lipid profiles disorders in both dams and offspring. Maternal exercise markedly improved insulin sensitivity in dams and metabolic disorders in offspring from young into adulthood, especially the hepatic steatosis. The decrease in harmful bacteria and the persistent enrichment of short chain fatty acid producers from mothers to adult offspring, particularly the genus Odoribacter, were all associated with improvement in metabolism by maternal exercise. In addition, maternal exercise significant upregulated FGF21 and genes involved in the fatty acid oxidation and TCA cycle in adult offspring, which were down-regulated by perinatal high-fat diet and were significantly correlated with the altered microbial species. Conclusion: Overall, maternal exercise could significantly mitigate the detrimental effects of perinatal high-fat diet on metabolism in both dams and male offspring. The continuous alterations in gut microbiota and reprogramming hepatic metabolism might be critical factors in deciphering the transgenerational metabolic benefits of maternal exercise, which provides some novel evidence and targets for combating the metabolic diseases.


iScience ◽  
2021 ◽  
Vol 24 (2) ◽  
pp. 102077
Author(s):  
Hu Hua ◽  
Yue Zhang ◽  
Fei Zhao ◽  
Ke Chen ◽  
Tong Wu ◽  
...  

2021 ◽  
Author(s):  
Yilin Liu ◽  
Chunyan Xie ◽  
Zhenya Zhai ◽  
Ze-yuan Deng ◽  
Hugo R. De Jonge ◽  
...  

This study aimed to investigate the effect of uridine on obesity, fat accumulation in liver, and gut microbiota composition in high-fat diet-fed mice.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kalpana D. Acharya ◽  
Xing Gao ◽  
Elizabeth P. Bless ◽  
Jun Chen ◽  
Marc J. Tetel

An amendment to this paper has been published and can be accessed via a link at the top of the paper.


Author(s):  
Aili Li ◽  
Nana Wang ◽  
Na Li ◽  
Bailiang Li ◽  
Fenfen Yan ◽  
...  

2021 ◽  
Author(s):  
Xiao Guo ◽  
Xuedan Cao ◽  
Xiugui Fang ◽  
Ailing Guo ◽  
Erhu Li

In this study, Ougan juice (OJ) and lactic acid bacteria fermented Ougan juice (FOJ) were investigated individually for their capability of preventing obesity in high-fat diet (HFD)-fed C57BL/6J mice. After...


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