scholarly journals Dietary Polysaccharide from Enteromorpha clathrata Attenuates Obesity and Increases the Intestinal Abundance of Butyrate-producing Bacterium, Eubacterium xylanophilum, in Mice Fed a High-Fat Diet

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3286
Author(s):  
Jiali Wei ◽  
Yiran Zhao ◽  
Chen Zhou ◽  
Qing Zhao ◽  
Hongqian Zhong ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
High Fat Diet ◽  
High Throughput Sequencing ◽  
Serum Levels ◽  
Bioinformatic Analysis ◽  
The Body ◽  
Therapeutic Effects ◽  
High Fat ◽  
Intestinal Dysbiosis ◽  
Treatment Of Obesity

Previous studies have suggested that polysaccharide from Enteromorpha clathrata (ECP) could be used as a potential prebiotic to treat dysbiosis-associated diseases. However, whether it has any therapeutic effects on obesity has not been investigated. In the present study, we explored the anti-obesity effect of ECP and illustrated that it can significantly reduce the body weight and decrease the serum levels of triacylglycerol and cholesterol in high-fat diet (HFD)-fed mice. As revealed by 16S rRNA high-throughput sequencing and bioinformatic analysis, HFD remarkably changed the composition of the gut microbiota and promoted the growth of opportunistic pathogens such as Mucispirillum, Desulfobacterota and Alphaproteobacteria in obese mice. Interestingly, ECP improved intestinal dysbiosis caused by HFD and reshaped the structure of the gut microbiota in diseased mice by increasing the abundance of butyrate-producing bacterium, Eubacterium xylanophilum, in the gut. Altogether, we demonstrate for the first time an anti-obesity effect of ECP and shed new light into its therapeutic mechanisms from the perspective of gut microbiota. Our study will pave the way for the development of ECP as new prebiotic for the treatment of obesity and its associated disorders.

scholarly journals Comparative Evaluation of the Effect of Metformin and Insulin on Gut Microbiota and Metabolome Profiles of Type 2 Diabetic Rats Induced by the Combination of Streptozotocin and High-Fat Diet

2022 ◽  
Vol 12 ◽  
Author(s):  
Nan Hu ◽  
Qi Zhang ◽  
Hui Wang ◽  
Xuping Yang ◽  
Yan Jiang ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
High Fat Diet ◽  
Insulin Treatment ◽  
Serum Levels ◽  
Underlying Mechanism ◽  
Diabetic Rats ◽  
Therapeutic Effects ◽  
Metformin Treatment ◽  
High Fat

Lately, an increasing number of studies have investigated the relationship between metformin and gut microbiota, suggesting that metformin exerts part of its hypoglycemic effect through the microbes. However, its underlying mechanism remains largely undetermined. In the present study, we investigated the effects of metformin on gut microbiota and metabolome profiles in serum and compared it with insulin treatment in rats with type 2 diabetes mellitus (T2DM). Diabetic rats (DM group) were induced by a combination of streptozotocin and high-fat diet (HFD). After 7 days, DM rats were treated with metformin (MET group) or insulin (INS group) for 3 weeks. The 16S rRNA sequencing of the gut microbiota and non-targeted metabolomics analysis of serum were conducted. A total of 13 bile acids (BAs) in serum were further determined and compared among different groups. The rat model of T2DM was well established with the typical diabetic symptoms, showing significantly increased blood glucose, AUC of OGTT, HOMA-IR, TC, TG, LDL-C and TBA. Metformin or insulin treatment could ameliorate symptoms of diabetes and partly recover the abnormal biochemical indicators. Compared with DM rats, the relative abundances of 13 genera were significantly changed after metformin treatment, while only three genera were changed after insulin treatment. The metformin and insulin treatments also exhibited different serum metabolome profiles in T2DM rats. Moreover, 64 differential metabolites were identified between MET and DM groups, whereas 206 were identified between INS and DM groups. Insulin treatment showed greater influence on amino acids, glycerophospholipids/glycerolipids, and acylcarnitine compared with the metformin treatment, while metformin had an important impact on BAs. Furthermore, metformin could significantly decrease the serum levels of CA, GCA, UDCA, and GUDCA, but increase the level of TLCA in DM rats. Insulin treatment significantly decreased the levels of CA, UDCA, and CDCA. Besides, several metabolites in serum or microbiota were positively or negatively correlated with some bacteria. Collectively, our findings indicated that metformin had a stronger effect on gut microbiota than insulin, while insulin treatment showed greater influence on serum metabolites, which provided novel insights into the therapeutic effects of metformin on diabetes.

scholarly journals Baicalin Attenuates High Fat Diet-Induced Obesity and Liver Dysfunction: Dose-Response and Potential Role of CaMKKβ/AMPK/ACC Pathway

2015 ◽  
Vol 35 (6) ◽  
pp. 2349-2359 ◽  
Author(s):  
Youli Xi ◽  
Miaozong Wu ◽  
Hongxia Li ◽  
Siqi Dong ◽  
Erfei Luo ◽  
...  
Keyword(s):  
Protein Kinase ◽  
Fatty Liver ◽  
High Fat Diet ◽  
Molecular Mechanisms ◽  
Liver Steatosis ◽  
Serum Levels ◽  
Whole Body ◽  
Therapeutic Effects ◽  
High Fat ◽  
Dependent Protein

Background/Aims: Obesity-associated fatty liver disease affects millions of individuals. This study aimed to evaluate the therapeutic effects of baicalin to treat obesity and fatty liver in high fat diet-induced obese mice, and to study the potential molecular mechanisms. Methods: High fat diet-induced obese animals were treated with different doses of baicalin (100, 200 and 400 mg/kg/d). Whole body, fat pad and liver were weighed. Hyperlipidemia, liver steatosis, liver function, and hepatic Ca2+/CaM-dependent protein kinase kinase β (CaMKKβ) / AMP-activated protein kinase (AMPK) / acetyl-CoA carboxylase (ACC) were further evaluated. Results: Baicalin significantly decreased liver, epididymal fat and body weights in high fat diet-fed mice, which were associated with decreased serum levels of triglycerides, total cholesterol, LDL, alanine transaminase and aspartate transaminase, but increased serum HDL level. Pathological analysis revealed baicalin dose-dependently decreased the degree of hepatic steatosis, with predominantly diminished macrovesicular steatosis at lower dose but both macrovesicular and microvesicular steatoses at higher dose of baicalin. Baicalin dose-dependently inhibited hepatic CaMKKβ/AMPK/ACC pathway. Conclusion: These data suggest that baicalin up to 400 mg/kg/d is safe and able to decrease the degree of obesity and fatty liver diseases. Hepatic CaMKKβ/AMPK/ACC pathway may mediate the therapeutic effects of baicalin in high fat diet animal model.

scholarly journals α-Methyl-L-Tryptophan as a Weight-Loss Agent in Multiple Models of Obesity in Mice

2021 ◽  
Author(s):  
Sathish Sivaprakasam ◽  
Sabarish Ramachandran ◽  
Mohd Omar Faruk Sikder ◽  
Yangzom Doma Bhutia ◽  
Mitchell Wachtel ◽  
...  
Keyword(s):  
Weight Loss ◽  
High Fat Diet ◽  
Amino Acid Profile ◽  
Normal Diet ◽  
The Body ◽  
Multiple Models ◽  
High Fat ◽  
Liver And Kidney ◽  
Obesity In Mice ◽  
Treatment Of Obesity

a-Methyl-L-tryptophan (a-MLT) is currently in use as a tracer in its 11C-labeled form to monitor the health of serotonergic neurons in humans. In the present study, we found this compound to function as an effective weight-loss agent at pharmacological doses in multiple models of obesity in mice. The drug was able to reduce the body weight when given orally in drinking water (1 mg/ml) in three different models of obesity: normal mice on high-fat diet, Slc6a14-null mice on high-fat diet, and ob/ob mice on normal diet. Only the L-enantiomer (a-MLT) was active while the D-enantiomer (a-MDT) had negligible activity. The weight-loss effect was freely reversible, with the weight gain resuming soon after the withdrawal of the drug. All three models of obesity were associated with hyperglycemia, insulin resistance, and hepatic steatosis; a-MLT reversed these features. There was a decrease in food intake in the treatment group. Mice on a high-fat diet showed decreased cholesterol and protein in the serum when treated with a-MLT; there was however no evidence of liver and kidney dysfunction. Plasma amino acid profile indicated a significant decrease in the levels of specific amino acids, including tryptophan; but the levels of arginine were increased. We conclude that a-MLT is an effective, reversible, and orally active drug for the treatment of obesity and metabolic syndrome.

scholarly journals Effect of A Polyphenol-Rich Canarium album Extract on the Composition of the Gut Microbiota of Mice Fed a High-Fat Diet

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2188 ◽  
Author(s):  
Ning-Ning Zhang ◽  
Wen-Hui Guo ◽  
Han Hu ◽  
A-Rong Zhou ◽  
Qing-Pei Liu ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
High Fat Diet ◽  
High Throughput Sequencing ◽  
Chow Diet ◽  
Microbiota Composition ◽  
High Fat ◽  
Canarium Album ◽  
Normal Chow ◽  
Gut Microbiota Composition ◽  
Medium Dose

This study investigated the influence of Canarium album extract (CAext) on intestinal microbiota composition of mice fed a high-fat diet (HFD). Kun Ming (KM) mice were fed either a normal chow diet or a HFD for six weeks. At the seventh week, HFD-fed mice were gavaged daily with saline, or a different dose of CAext for four weeks, respectively. Then, the composition of the gut microbiota was analyzed by high-throughput sequencing technology. Analysis of fecal microbial populations, grouped by phyla, showed significant increases of Firmicutes and Verrucomicrobia, but a decrease of Bacteroidetes in all CAext-fed mice. Particularly, CAext gavage in a low dose or a medium dose caused a significant increase in the proportion of Akkermansia. These findings suggested that CAext can alter the gut microbiota composition of HFD-fed mice, and had a potential prebiotic effects on Akkermansia.

scholarly journals Citrobacter Species Increase Energy Harvest by Modulating Intestinal Microbiota in Fish: Nondominant Species Play Important Functions

mSystems ◽  
2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Mei-Ling Zhang ◽  
Miao Li ◽  
Yi Sheng ◽  
Fang Tan ◽  
Liqiao Chen ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Intestinal Microbiota ◽  
Lipid Accumulation ◽  
High Fat Diet ◽  
High Throughput Sequencing ◽  
Intestinal Bacteria ◽  
Absorption Efficiency ◽  
Energy Harvest ◽  
High Fat ◽  
Microbial Composition

ABSTRACT An efficient energy harvesting mechanism is likely critical for animals in their natural environment. Intestinal microbiota enriched by a high-fat diet aid in lipid accumulation, a strategy likely evolved for energy harvest in mammals. However, whether this strategy is conserved among vertebrate organisms remains unclear. A bacterial strain (S1), enriched on soybean oil rich medium, was isolated from the gut of Nile tilapia and demonstrated to be a member of the Citrobacter genus. Although a high-fat diet increased the number of Citrobacter spp., these bacteria were not abundant in the intestine by high-throughput sequencing. Addition of bacterium S1 to a high-fat diet modulated intestinal microbial composition and increased high-fat diet-induced lipid accumulation in mesenteric adipose tissue, accompanied by (i) increased triglyceride absorption efficiency and triglyceride reesterification and (ii) increased intestinal permeability. Collectively, our results provide evidence that specific intestinal bacteria aid the host in harvesting more energy from a high-fat diet in fish. Furthermore, the results from the present study also suggest that nondominant bacteria in the gut may play an important role in regulating host metabolism. IMPORTANCE This study shows that the ability of gut microbiota members to enhance host energy harvest from a high-fat diet is a conserved feature of host-microbe interactions in fish, as in mammals. It also underscores that gut microbiota members are able to significantly impact host biology even when at low abundance.

scholarly journals PEGylated Curcumin Derivative Attenuates Hepatic Steatosis via CREB/PPAR-γ/CD36 Pathway

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Yu Liu ◽  
Fei Cheng ◽  
Yuxuan Luo ◽  
Zhu Zhan ◽  
Peng Hu ◽  
...  
Keyword(s):  
Hepatic Steatosis ◽  
High Fat Diet ◽  
Liver Lipid ◽  
Serum Triglyceride ◽  
The Body ◽  
Chow Diet ◽  
Therapeutic Effects ◽  
Peroxisome Proliferator ◽  
High Fat ◽  
Curcumin Derivative

Curcumin has the potential to cure dyslipidemia and nonalcoholic fatty liver disease (NAFLD). However, its therapeutic effects are curbed by poor bioavailability. Our previous work has shown that modification of curcumin with polyethylene glycol (PEG) improves blood concentration and tissue distribution. This study sought to investigate the role of a novel PEGylated curcumin derivative (Curc-mPEG454) in regulating hepatic lipid metabolism and to elucidate the underlying molecular mechanism in a high-fat-diet- (HFD-) fed C57BL/6J mouse model. Mice were fed either a control chow diet (D12450B), an HFD (D12492) as the NAFLD model, or an HFD with Curc-mPEG454 administered by intraperitoneal injection at 50 mg/kg or 100 mg/kg for 16 weeks. We found that Curc-mPEG454 significantly lowered the body weight and serum triglyceride (TG) levels and reduced liver lipid accumulation in HFD-induced NAFLD mice. It was also shown that Curc-mPEG454 suppressed the HFD-induced upregulated expression of CD36 and hepatic peroxisome proliferator activated receptor-γ (PPAR-γ), a positive regulator of CD36. Moreover, Curc-mPEG454 dramatically activated cAMP response element-binding (CREB) protein, which negatively controls hepatic PPAR-γ expression. These findings suggest that Curc-mPEG454 reverses HFD-induced hepatic steatosis via the activation of CREB inhibition of the hepatic PPAR-γ/CD36 pathway, which may be an effective therapeutic for high-fat-diet-induced NAFLD.

scholarly journals Novel role of hesperidin improve obesity in HFD mice by modulating the composition of the gut microbiota

2020 ◽  
Author(s):  
Zhihua Liu ◽  
Ting Liu ◽  
Chao Lei ◽  
Weiqi Song ◽  
Rong Fang ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
High Fat Diet ◽  
Low Grade ◽  
Helicobacter Hepaticus ◽  
Faecal Microbiota ◽  
High Fat ◽  
Lactobacillus Salivarius ◽  
Diet Induced Obesity ◽  
Intestinal Dysbiosis

Abstract Background Hesperidin is a plant-derived dihydroflavone derivatives with multiple pharmacological function. Obesity is associated with low-grade chronic inflammation and intestinal dysbiosis. We examined the possibility that hesperidin may prevent diet-induced obesity by modulating the composition of the gut microbiota. High-fat diet (HFD)-fed mice were treated with hesperidin. Its effects on the gut microbiota were assessed by horizontal faecal microbiota transplantation (FMT) and 16S rDNA-based microbiota analysis.ResultsGut microbiota analysis revealed that hesperidin selectively promoted the growth of beneficial Lactobacillus salivarius and harmful Staphylococcus sciuri, Desulfovibrio C21_c20 and inhibiting beneficial Bifidobacterium pseudolongum, Mucispirillum schaedleri and harmful Helicobacter ganmani , Helicobacter hepaticus . in HFD-fed mice. However, hesperidin reverses obesity, inflammation and improves gut integrity in HFD-fed mice. The anti-obesity effects and hesperidin-modulated Lactobacillus salivarius, Desulfovibrio C21_c20, Mucispirillum schaedleri and Helicobacter hepaticus were transmissible via horizontal faces transfer from hesperidin-treated mice to HFD-fed mice.Conclusions Hesperidin has a role to reduce body weight and reverse HFD-related disorders in HFD-fed mice by enriching some beneficial and inhibiting harmful microbes.

scholarly journals Bifidobacterium adolescentis Isolated from Different Hosts Modifies the Intestinal Microbiota and Displays Differential Metabolic and Immunomodulatory Properties in Mice Fed a High-Fat Diet

Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 1017
Author(s):  
Botao Wang ◽  
Qingmin Kong ◽  
Shumao Cui ◽  
Xiu Li ◽  
Zhennan Gu ◽  
...  
Keyword(s):  
Body Weight ◽  
Lipid Metabolism ◽  
Gut Microbiota ◽  
Intestinal Microbiota ◽  
High Fat Diet ◽  
The Elderly ◽  
The Body ◽  
High Fat ◽  
Bifidobacterium Adolescentis ◽  
Elderly Humans

The incidence of obesity, which is closely associated with the gut microbiota and chronic inflammation, has rapidly increased in the past 40 years. Therefore, the probiotic-based modification of the intestinal microbiota composition has been developed as a strategy for the treatment of obesity. In this study, we selected four Bifidobacterium adolescentis strains isolated from the feces of newborn and elderly humans to investigate whether supplementation with B. adolescentis of various origins could alleviate obesity in mice. Male C57BL/6J mice fed a high-fat diet (HFD, 60% energy as fat) received one of the following 14-week interventions: (i) B. adolescentis N4_N3, (ii) B. adolescentis Z25, (iii) B. adolescentis 17_3, (iv) B. adolescentis 2016_7_2, and (v) phosphate-buffered saline. The metabolic parameters, thermogenesis, and immunity of all treated mice were measured. Cecal and colonic microbial profiles were determined by 16S rRNA gene sequencing. Intestinal concentrations of short-chain fatty acids (SCFAs) were measured by gas chromatography-mass spectrometry (GC-MS). The B. adolescentis strains isolated from the feces of elderly humans (B. adolescentis Z25, 17_3, and 2016_7_2) decreased the body weight or weight gain of mice, whilst the strain isolated from the newborn (B. adolescentis N4_N3) increased the body weight of mice. The B. adolescentis strains isolated from the elderly also increased serum leptin concentrations and induced the expression of thermogenesis- and lipid metabolism-related genes in brown adipose tissue. All the B. adolescentis strains alleviated inflammations in the spleen and brain and modified the cecal and colonic microbiota. Particularly, all strains reversed the HFD-induced depletion of Bifidobacterium and reduced the development of beta-lactam resistance. In addition, the B. adolescentis strains isolated from the elderly increased the relative abundances of potentially beneficial genera, such as Bacteroides, Parabacteroides, and Faecalibaculum. We speculate that such increased abundance of commensal bacteria may have mediated the alleviation of obesity, as B. adolescentis supplementation decreased the intestinal production of SCFAs, thereby reducing energy delivery to the host mice. Our results revealed that certain strains of B. adolescentis can alleviate obesity and modify the gut microbiota of mice. The tested strains of B. adolescentis showed different effects on lipid metabolism and immunity regulation, with these effects related to whether they had been isolated from the feces of newborn or elderly humans. This indicates that B. adolescentis from different sources may have disparate effects on host health possibly due to the transmission of origin-specific functions to the host.

scholarly journals Correlations between α-Linolenic Acid-Improved Multitissue Homeostasis and Gut Microbiota in Mice Fed a High-Fat Diet

mSystems ◽  
2020 ◽  
Vol 5 (6) ◽  
Author(s):  
Xiaoyu Gao ◽  
Songlin Chang ◽  
Shuangfeng Liu ◽  
Lei Peng ◽  
Jing Xie ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Linolenic Acid ◽  
High Fat Diet ◽  
Metabolic Disorders ◽  
The Body ◽  
Metabolic Phenotype ◽  
High Fat ◽  
Strong Negative Correlation ◽  
Correlation Networks ◽  
Metabolic Endotoxemia

ABSTRACT Previous studies have shown that α-linolenic acid (ALA) has a significant regulatory effect on related disorders induced by high-fat diets (HFDs), but little is known regarding the correlation between the gut microbiota and disease-related multitissue homeostasis. We systematically investigated the effects of ALA on the body composition, glucose homeostasis, hyperlipidemia, metabolic endotoxemia and systemic inflammation, white adipose tissue (WAT) homeostasis, liver homeostasis, intestinal homeostasis, and gut microbiota of mice fed an HFD (HFD mice). We found that ALA improved HFD-induced multitissue metabolic disorders and gut microbiota disorders to various degrees. Importantly, we established a complex but clear network between the gut microbiota and host parameters. Several specific differential bacteria were significantly associated with improved host parameters. Rikenellaceae_RC9_gut_group and Parasutterella were positively correlated with HFD-induced “harmful indicators” and negatively correlated with “beneficial indicators.” Intriguingly, Bilophila showed a strong negative correlation with HFD-induced multitissue metabolic disorders and a significant positive correlation with most beneficial indicators, which is different from its previous characterization as a “potentially harmful genus.” Turicibacter might be the key beneficial bacterium for ALA-improved metabolic endotoxemia, while Blautia might play an important role in ALA-improved gut barrier integrity and anti-inflammatory effects. The results suggested that the gut microbiota, especially some specific bacteria, played an important role in the process of ALA-improved multitissue homeostasis in HFD mice, and different bacteria might have different divisions of regulation. IMPORTANCE Insufficient intake of n-3 polyunsaturated fatty acids is an important issue in modern Western-style diets. A large amount of evidence now suggests that a balanced intestinal microecology is considered an important part of health. Our results show that α-linolenic acid administration significantly improved the host metabolic phenotype and gut microbiota of mice fed a high-fat diet, and there was a correlation between the improved gut microbiota and metabolic phenotype. Some specific bacteria may play a unique regulatory role. Here, we have established correlation networks between gut microbiota and multitissue homeostasis, which may provide a new basis for further elucidating the relationship between the gut microbiota and host metabolism.

scholarly journals Acupuncture Regulating Gut Microbiota in Abdominal Obese Rats Induced by High-Fat Diet

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Haiying Wang ◽  
Qiang Wang ◽  
Cuimei Liang ◽  
Mingxing Su ◽  
Xin Wang ◽  
...  
Keyword(s):  
Body Weight ◽  
Gut Microbiota ◽  
High Fat Diet ◽  
16S Rrna Gene Sequencing ◽  
The Body ◽  
Chow Diet ◽  
Rrna Gene ◽  
Sprague Dawley ◽  
High Fat ◽  
Obese Rats

Objective. To investigate the effects of acupuncture on metabolic health and gut microbiota dysbiosis in diet-induced abdominal obese model. Materials and Methods. Male Sprague-Dawley rats were randomly distributed into normal chow diet (NCD) group and high-fat diet (HFD) group. After 12 weeks of HFD feeding, an abdominal obese rat model was established. The abdominal obese rats were further assigned to acupuncture group (n=7) and nontreated HFD group (n=7). Acupuncture was applied to bilateral GB 26 of rats for 8 weeks. Subsequently, the body weight, waist circumference (WC), visceral fat mass, and liver weight were measured weekly in all rats. Metabolic parameters such as total cholesterol, triglyceride, alanine aminotransferase, aspartate transaminase, and blood glucose were measured by an automatic biochemical analyzer. The serum levels of insulin (INS) were determined using Rat INS ELISA Kit. Analysis of gut microbiota was carried out by 16S rRNA gene sequencing. Results. Acupuncture decreased the body weight, WC, and visceral adipose tissues of HFD-induced abdominal obese rats. In addition, insulin sensitivity, glucose homeostasis, and lipid metabolism were improved by this treatment. Furthermore, electroacupuncture effectively modified the composition of gut microbiota, mainly via decreasing Firmicutes/Bacteroidetes ratio and increasing Prevotella_9 abundance. Conclusions. Electroacupuncture can ameliorate abdominal obesity and prevent metabolic disorders in HFD-induced abdominal obese rats, via the modulation of gut microbiota.

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