151
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Olguin-Calderon D. Modulation of Caecal Microbiome in Obese Mice Associated with Administration of Amaranth or Soybean Protein Isolates. POL J FOOD NUTR SCI 2018. [DOI: 10.31883/pjfns-2019-0002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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152
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Ma JE, Jiang HY, Li LM, Zhang XJ, Li GY, Li HM, Jin XJ, Chen JP. The Fecal Metagenomics of Malayan Pangolins Identifies an Extensive Adaptation to Myrmecophagy. Front Microbiol 2018; 9:2793. [PMID: 30532742 PMCID: PMC6265309 DOI: 10.3389/fmicb.2018.02793] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 10/30/2018] [Indexed: 01/31/2023] Open
Abstract
The characteristics of flora in the intestine of an animal, including the number and abundance of different microbial species and their functions, are closely related to the diets of the animal and affect the physical condition of the host. The Malayan pangolin (Manis javanica) is an endangered species that specializes in myrmecophagy. Analyzing the microbiome in the intestine of the pangolin is imperative to protect this species. By sequencing the metagenomes of the feces of four pangolins, we constructed a non-redundant catalog of 211,868 genes representing 1,811 metagenomic species. Taxonomic annotation revealed that Bacteroidetes (49.9%), Proteobacteria (32.2%), and Firmicutes (12.6%) are the three main phyla. The annotation of gene functions identified 5,044 genes from 88 different glycoside hydrolase (GH) families in the Carbohydrate-Active enZYmes database and 114 gene modules related to chitin-degrading enzymes, corresponding to the catalytic domains of GH18 family enzymes, containing chitinase genes of classes III and V in the dataset. Fourteen gene modules corresponded to the catalytic domains of GH19 family enzymes, containing chitinase genes of classes I, II, and IV. These genes were found in 37 species belonging to four phyla: Bacteroidetes, Cyanobacteria, Firmicutes, and Proteobacteria. Moreover, when the metabolic pathways of these genes were summarized, 41,711 genes were associated with 147 unique KEGG metabolic pathways, and these genes were assigned to two Gene Ontology terms: metabolic process and catalytic activity. We also found several species that likely play roles in the digestion of cellulose and may be able to degrade chitin, including Enterobacter cloacae, Lactococcus lactis, Chitinimonas koreensis, and Chitinophaga pinensis. In addition, we identified some intestinal microflora and genes related to diseases in pangolins. Twenty-seven species were identified by STAMP analysis as differentially abundant in healthy and diseased animals: 20 species, including Cellulosilyticum lentocellum and Lactobacillus reuteri, were more abundant in healthy pangolins, while seven species, including Odoribacter splanchnicus, Marinilabilia salmonicolor, Xanthomonas citri, Xanthomonas vasicola, Oxalobacter formigenes, Prolixibacter bellariivorans, and Clostridium bolteae, were more abundant in diseased pangolins. These results will support the efforts to conserve pangolins.
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Affiliation(s)
- Jing-E Ma
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Hai-Ying Jiang
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Lin-Miao Li
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Xiu-Juan Zhang
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Guan-Yu Li
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Hui-Ming Li
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Xue-Jun Jin
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
| | - Jin-Ping Chen
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou, China
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153
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Lesouhaitier O, Clamens T, Rosay T, Desriac F, Louis M, Rodrigues S, Gannesen A, Plakunov VK, Bouffartigues E, Tahrioui A, Bazire A, Dufour A, Cornelis P, Chevalier S, Feuilloley MGJ. Host Peptidic Hormones Affecting Bacterial Biofilm Formation and Virulence. J Innate Immun 2018; 11:227-241. [PMID: 30396172 PMCID: PMC6738206 DOI: 10.1159/000493926] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/10/2018] [Accepted: 09/10/2018] [Indexed: 12/25/2022] Open
Abstract
Bacterial biofilms constitute a critical problem in hospitals, especially in resuscitation units or for immunocompromised patients, since bacteria embedded in their own matrix are not only protected against antibiotics but also develop resistant variant strains. In the last decade, an original approach to prevent biofilm formation has consisted of studying the antibacterial potential of host communication molecules. Thus, some of these compounds have been identified for their ability to modify the biofilm formation of both Gram-negative and Gram-positive bacteria. In addition to their effect on biofilm production, a detailed study of the mechanism of action of these human hormones on bacterial physiology has allowed the identification of new bacterial pathways involved in biofilm formation. In this review, we focus on the impact of neuropeptidic hormones on bacteria, address some future therapeutic issues, and provide a new view of inter-kingdom communication.
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Affiliation(s)
- Olivier Lesouhaitier
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France,
| | - Thomas Clamens
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Thibaut Rosay
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Florie Desriac
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Mélissande Louis
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Sophie Rodrigues
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Andrei Gannesen
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of RAS, Moscow, Russian Federation
- Lomonosov Moscow State University, Moscow, Russian Federation
| | - Vladimir K Plakunov
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of RAS, Moscow, Russian Federation
| | - Emeline Bouffartigues
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Ali Tahrioui
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Alexis Bazire
- Laboratoire de Biotechnologie et Chimie Marines EA 3884, IUEM, Université de Bretagne-Sud (UBL), Lorient, France
| | - Alain Dufour
- Laboratoire de Biotechnologie et Chimie Marines EA 3884, IUEM, Université de Bretagne-Sud (UBL), Lorient, France
| | - Pierre Cornelis
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Sylvie Chevalier
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
| | - Marc G J Feuilloley
- Laboratory of Microbiology Signals and Microenvironment, LMSM EA 4312, Normandy University, University of Rouen Normandy, Evreux, France
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154
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Cani PD, Jordan BF. Gut microbiota-mediated inflammation in obesity: a link with gastrointestinal cancer. Nat Rev Gastroenterol Hepatol 2018; 15:671-682. [PMID: 29844585 DOI: 10.1038/s41575-018-0025-6] [Citation(s) in RCA: 235] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Overweight and obesity are associated with increased risk of developing metabolic disorders such as diabetes and cardiovascular diseases. However, besides these metabolic diseases, excess body weight is also associated with different cancers, including gastrointestinal cancers, such as liver, pancreatic and colon cancers. Inflammation is a common feature of both obesity and cancer; however, the origin of this inflammation has been largely debated. Over the past decade, growing evidence has shown that the composition of the gut microbiota and its activity might be associated not only with the onset of inflammation but also with metabolic disorders and cancer. Here, we review the links between the gut microbiota, gut barrier function and the onset of low-grade inflammation in the development of gastrointestinal cancer. We also describe the mechanisms by which specific microorganism-associated molecular patterns crosstalk with the immune system and how the metabolic activity of bacteria induces specific signalling pathways beyond the gut that eventually trigger carcinogenesis.
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Affiliation(s)
- Patrice D Cani
- Université catholique de Louvain, Louvain Drug Research Institute, WELBIO (Walloon Excellence in Life sciences and BIOtechnology), Metabolism and Nutrition Research Group, Brussels, Belgium.
| | - Benedicte F Jordan
- Université catholique de Louvain, Louvain Drug Research Institute, Biomedical Magnetic Resonance Research Group, Brussels, Belgium
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155
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Figueroa-Lozano S, de Vos P. Relationship Between Oligosaccharides and Glycoconjugates Content in Human Milk and the Development of the Gut Barrier. Compr Rev Food Sci Food Saf 2018; 18:121-139. [DOI: 10.1111/1541-4337.12400] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/17/2018] [Accepted: 09/18/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Susana Figueroa-Lozano
- Immunoendocrinology, Div. of Medical Biology, Dept. of Pathology and Medical Biology; Univ. of Groningen and University Medical Center Groningen; Groningen The Netherlands
| | - Paul de Vos
- Immunoendocrinology, Div. of Medical Biology, Dept. of Pathology and Medical Biology; Univ. of Groningen and University Medical Center Groningen; Groningen The Netherlands
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156
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Xu C, Liu X, Zha H, Fan S, Zhang D, Li S, Xiao W. A pathogen-derived effector modulates host glucose metabolism by arginine GlcNAcylation of HIF-1α protein. PLoS Pathog 2018; 14:e1007259. [PMID: 30125331 PMCID: PMC6117090 DOI: 10.1371/journal.ppat.1007259] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 08/30/2018] [Accepted: 08/07/2018] [Indexed: 12/18/2022] Open
Abstract
The essential role of pathogens in host metabolism is widely recognized, yet the mechanisms by which they affect host physiology remain to be fully defined. Here, we found that NleB, an enteropathogenic Escherichia coli (EPEC) type III secretion system effector known to possess N-acetylglucosamine (GlcNAc) transferase activity, GlcNAcylates HIF-1α, a master regulator of cellular O2 homeostasis. We determined that NleB-mediated GlcNAcylation at a conserved arginine 18 (Arg18) at the N-terminus of HIF-1α enhanced HIF-1α transcriptional activity, thereby inducing HIF-1α downstream gene expression to alter host glucose metabolism. The arginine transferase activity of NleB was required for its enhancement of HIF-1α transactivity and the subsequent effect on glucose metabolism in a mouse model of EPEC infection. In addition, HIF-1α acted as a mediator to transact NleB-mediated induction of glucose metabolism-associated gene expression under hypoxia. Thus, our results further show a causal link between pathogen infection and host glucose metabolism, and we propose a new mechanism by which this occurs. Accumulating evidence shows that pathogens can affect host metabolism, resulting in human diseases such as obesity and type 2 diabetes. However, how pathogens influence their hosts is still not clear, and this results in a lack of effective and specific clinical treatments. Further investigations into the causes of pathogen disturbance of host metabolism are urgently needed. In this study, we show that a protein molecule, NleB, secreted by enteropathogenic bacteria (EPEC) can get into host cells and modify the function of a master regulator of cellular O2 homeostasis, HIF-1α, thereby altering host glucose metabolism. We show that HIF-1α acts as a mediator to transact NleB-mediated induction of glucose metabolism-associated gene expression under hypoxia. Our results reveal a causal link between pathogen infection and host glucose metabolism, which may provide a new explanation for the causes of human diseases related to metabolic disturbance.
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Affiliation(s)
- Chenxi Xu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P. R. China
- University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Xing Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Huangyuan Zha
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Sijia Fan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Dawei Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Shan Li
- Institute of Infection and Immunity, Taihe Hospital, Hubei University of Medicine, Shiyan, P. R. China
- Biomedical Center, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Wuhan Xiao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, P. R. China
- The Key laboratory of Aquaculture Disease Control, Ministry of Agriculture, Wuhan, P. R. China
- * E-mail:
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157
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Kogut MH, Genovese KJ, Swaggerty CL, He H, Broom L. Inflammatory phenotypes in the intestine of poultry: not all inflammation is created equal. Poult Sci 2018; 97:2339-2346. [DOI: 10.3382/ps/pey087] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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158
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Abstract
PURPOSE OF REVIEW The objective of this review is to critically assess the contributing role of the gut microbiota in human obesity and type 2 diabetes (T2D). RECENT FINDINGS Experiments in animal and human studies have produced growing evidence for the causality of the gut microbiome in developing obesity and T2D. The introduction of high-throughput sequencing technologies has provided novel insight into the interpersonal differences in microbiome composition and function. The intestinal microbiota is known to be associated with metabolic syndrome and related comorbidities. Associated diseases including obesity, T2D, and fatty liver disease (NAFLD/NASH) all seem to be linked to altered microbial composition; however, causality has not been proven yet. Elucidating the potential causal and personalized role of the human gut microbiota in obesity and T2D is highly prioritized.
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Affiliation(s)
- Ömrüm Aydin
- Department of Internal Medicine, MC Slotervaart, Amsterdam, The Netherlands
- Department of Internal Medicine, AMC-UVA, Amsterdam, The Netherlands
| | - Max Nieuwdorp
- Department of Internal Medicine, AMC-UVA, Amsterdam, The Netherlands
- Diabetes Center, Department of Internal Medicine, VU University Medical Center, Amsterdam, The Netherlands
- Wallenberg Laboratory, University of Gothenberg, Gothenberg, Sweden
| | - Victor Gerdes
- Department of Internal Medicine, MC Slotervaart, Amsterdam, The Netherlands.
- Department of Internal Medicine, AMC-UVA, Amsterdam, The Netherlands.
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159
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Elderman M, de Vos P, Faas M. Role of Microbiota in Sexually Dimorphic Immunity. Front Immunol 2018; 9:1018. [PMID: 29910797 PMCID: PMC5992421 DOI: 10.3389/fimmu.2018.01018] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 04/24/2018] [Indexed: 12/28/2022] Open
Abstract
Sex differences in peripheral immune responses are well recognized. This is associated with sex differences in many immunological diseases. As the intestinal microbiota is known to influence the immune system, such sex differences in immune responses may be a consequence of sex-specific microbiota. Therefore, this mini-review discusses sex differences in intestinal microbiota and the possible role of microbiota in shaping sexually dimorphic immunity. Sex differences in microbiota composition are clearly found in mice studies and also in human studies. However, the lack of standardization in human studies may mask the sexual dimorphism in microbiota composition in human studies, since many factors such as age, genetic background, BMI, diet, and sex hormones appear to interfere with the sexual dimorphism in microbiota composition. Only a few mice studies found that differences in gut microbiota composition are causative for some aspects of sexually dimorphic immunity. Therefore, future studies should focus on a causal relationship between sexually dimorphic immunity and microbiota, considering the abovementioned interfering confounding factors. This would benefit the development of more sex-specific effective treatment options for immunological diseases.
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Affiliation(s)
- Marlies Elderman
- Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands
| | - Paul de Vos
- Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands
| | - Marijke Faas
- Division of Medical Biology, Department of Pathology and Medical Biology, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands.,Department of Obstetrics and Gynecology, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands
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160
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American Gut: an Open Platform for Citizen Science Microbiome Research. mSystems 2018; 3:mSystems00031-18. [PMID: 29795809 PMCID: PMC5954204 DOI: 10.1128/msystems.00031-18] [Citation(s) in RCA: 480] [Impact Index Per Article: 80.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 04/16/2018] [Indexed: 12/15/2022] Open
Abstract
We show that a citizen science, self-selected cohort shipping samples through the mail at room temperature recaptures many known microbiome results from clinically collected cohorts and reveals new ones. Of particular interest is integrating n = 1 study data with the population data, showing that the extent of microbiome change after events such as surgery can exceed differences between distinct environmental biomes, and the effect of diverse plants in the diet, which we confirm with untargeted metabolomics on hundreds of samples. Although much work has linked the human microbiome to specific phenotypes and lifestyle variables, data from different projects have been challenging to integrate and the extent of microbial and molecular diversity in human stool remains unknown. Using standardized protocols from the Earth Microbiome Project and sample contributions from over 10,000 citizen-scientists, together with an open research network, we compare human microbiome specimens primarily from the United States, United Kingdom, and Australia to one another and to environmental samples. Our results show an unexpected range of beta-diversity in human stool microbiomes compared to environmental samples; demonstrate the utility of procedures for removing the effects of overgrowth during room-temperature shipping for revealing phenotype correlations; uncover new molecules and kinds of molecular communities in the human stool metabolome; and examine emergent associations among the microbiome, metabolome, and the diversity of plants that are consumed (rather than relying on reductive categorical variables such as veganism, which have little or no explanatory power). We also demonstrate the utility of the living data resource and cross-cohort comparison to confirm existing associations between the microbiome and psychiatric illness and to reveal the extent of microbiome change within one individual during surgery, providing a paradigm for open microbiome research and education. IMPORTANCE We show that a citizen science, self-selected cohort shipping samples through the mail at room temperature recaptures many known microbiome results from clinically collected cohorts and reveals new ones. Of particular interest is integrating n = 1 study data with the population data, showing that the extent of microbiome change after events such as surgery can exceed differences between distinct environmental biomes, and the effect of diverse plants in the diet, which we confirm with untargeted metabolomics on hundreds of samples.
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161
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Rastelli M, Knauf C, Cani PD. Gut Microbes and Health: A Focus on the Mechanisms Linking Microbes, Obesity, and Related Disorders. Obesity (Silver Spring) 2018; 26:792-800. [PMID: 29687645 PMCID: PMC5947576 DOI: 10.1002/oby.22175] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/26/2018] [Accepted: 01/30/2018] [Indexed: 12/12/2022]
Abstract
The past decade has been characterized by tremendous progress in the field of the gut microbiota and its impact on host metabolism. Although numerous studies show a strong relationship between the composition of gut microbiota and specific metabolic disorders associated with obesity, the key mechanisms are still being studied. The present review focuses on specific complex pathways as well as key interactions. For instance, the nervous routes are explored by examining the enteric nervous system, the vagus nerve, and the brain, as well as the endocrine routes (i.e., glucagon-like peptide-1, peptide YY, endocannabinoids) by which gut microbes communicate with the host. Moreover, the key metabolites involved in such specific interactions (e.g., short chain fatty acids, bile acids, neurotransmitters) as well as their targets (i.e., receptors, cell types, and organs) are briefly discussed. Finally, the review highlights the role of metabolic endotoxemia in the onset of metabolic disorders and the implications for alterations in gut microbiota-host interactions and ultimately the onset of diseases.
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Affiliation(s)
- Marialetizia Rastelli
- Metabolism and Nutrition Research Group, Walloon Excellence in Life Sciences and Biotechnology Institute and Louvain Drug Research InstituteUniversité catholique de LouvainBrusselsBelgium
- European Associated Laboratory NeuroMicrobiotaInstitut National de la Santé et de la Recherche MédicaleToulouseFrance
- European Associated Laboratory NeuroMicrobiotaUniversité catholique de LouvainBrusselsBelgium
| | - Claude Knauf
- European Associated Laboratory NeuroMicrobiotaInstitut National de la Santé et de la Recherche MédicaleToulouseFrance
- European Associated Laboratory NeuroMicrobiotaUniversité catholique de LouvainBrusselsBelgium
- Paul Sabatier UniversityToulouseFrance
- Institut de Recherche en Santé Digestive, Institut National de la Santé et de la Recherche Médicale U1220, Institut national de la recherche agronomique, École nationale vétérinaire de ToulouseToulouseFrance
| | - Patrice D. Cani
- Metabolism and Nutrition Research Group, Walloon Excellence in Life Sciences and Biotechnology Institute and Louvain Drug Research InstituteUniversité catholique de LouvainBrusselsBelgium
- European Associated Laboratory NeuroMicrobiotaInstitut National de la Santé et de la Recherche MédicaleToulouseFrance
- European Associated Laboratory NeuroMicrobiotaUniversité catholique de LouvainBrusselsBelgium
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162
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Four domains: The fundamental unicell and Post-Darwinian Cognition-Based Evolution. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2018; 140:49-73. [PMID: 29685747 DOI: 10.1016/j.pbiomolbio.2018.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/12/2018] [Indexed: 02/07/2023]
Abstract
Contemporary research supports the viewpoint that self-referential cognition is the proper definition of life. From that initiating platform, a cohesive alternative evolutionary narrative distinct from standard Neodarwinism can be presented. Cognition-Based Evolution contends that biological variation is a product of a self-reinforcing information cycle that derives from self-referential attachment to biological information space-time with its attendant ambiguities. That information cycle is embodied through obligatory linkages among energy, biological information, and communication. Successive reiterations of the information cycle enact the informational architectures of the basic unicellular forms. From that base, inter-domain and cell-cell communications enable genetic and cellular variations through self-referential natural informational engineering and cellular niche construction. Holobionts are the exclusive endpoints of that self-referential cellular engineering as obligatory multicellular combinations of the essential Four Domains: Prokaryota, Archaea, Eukaryota and the Virome. Therefore, it is advocated that these Four Domains represent the perpetual object of the living circumstance rather than the visible macroorganic forms. In consequence, biology and its evolutionary development can be appraised as the continual defense of instantiated cellular self-reference. As the survival of cells is as dependent upon limitations and boundaries as upon any freedom of action, it is proposed that selection represents only one of many forms of cellular constraint that sustain self-referential integrity.
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163
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Helminth infection in mice improves insulin sensitivity via modulation of gut microbiota and fatty acid metabolism. Pharmacol Res 2018; 132:33-46. [PMID: 29653264 DOI: 10.1016/j.phrs.2018.04.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/14/2018] [Accepted: 04/09/2018] [Indexed: 12/19/2022]
Abstract
Intestinal helminths are prevalent in individuals who live in rural areas of developing countries, where obesity, type 2 diabetes, and metabolic syndrome are rare. In the present study, we analyzed the modulation of the gut microbiota in mice infected with the helminth Strongyloides venezuelensis, and fed either a standard rodent chow diet or high-fat diet (HFD). To investigate the effects of the microbiota modulation on the metabolism, we analyzed the expression of tight-junction proteins present in the gut epithelium, inflammatory markers in the serum and tissue and quantified glucose tolerance and insulin sensitivity and resistance. Additionally, the levels of lipids related to inflammation were evaluated in the feces and serum. Our results show that infection with Strongyloides venezuelensis results in a modification of the gut microbiota, most notably by increasing Lactobacillus spp. These modifications in the microbiota alter the host metabolism by increasing the levels of anti-inflammatory cytokines, switching macrophages from a M1 to M2 pattern in the adipose tissue, increasing the expression of tight junction proteins in the intestinal cells (thereby reducing the permeability) and decreasing LPS in the serum. Taken together, these changes correlate with improved insulin signaling and sensitivity, which could also be achieved with HFD mice treated with probiotics. Additionally, helminth infected mice produce higher levels of oleic acid, which participates in anti-inflammatory pathways. These results suggest that modulation of the microbiota by helminth infection or probiotic treatment causes a reduction in subclinical inflammation, which has a positive effect on the glucose metabolism of the host.
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164
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Hoyles L, Snelling T, Umlai UK, Nicholson JK, Carding SR, Glen RC, McArthur S. Microbiome-host systems interactions: protective effects of propionate upon the blood-brain barrier. MICROBIOME 2018; 6:55. [PMID: 29562936 PMCID: PMC5863458 DOI: 10.1186/s40168-018-0439-y] [Citation(s) in RCA: 303] [Impact Index Per Article: 50.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 03/09/2018] [Indexed: 05/05/2023]
Abstract
BACKGROUND Gut microbiota composition and function are symbiotically linked with host health and altered in metabolic, inflammatory and neurodegenerative disorders. Three recognised mechanisms exist by which the microbiome influences the gut-brain axis: modification of autonomic/sensorimotor connections, immune activation, and neuroendocrine pathway regulation. We hypothesised interactions between circulating gut-derived microbial metabolites, and the blood-brain barrier (BBB) also contribute to the gut-brain axis. Propionate, produced from dietary substrates by colonic bacteria, stimulates intestinal gluconeogenesis and is associated with reduced stress behaviours, but its potential endocrine role has not been addressed. RESULTS After demonstrating expression of the propionate receptor FFAR3 on human brain endothelium, we examined the impact of a physiologically relevant propionate concentration (1 μM) on BBB properties in vitro. Propionate inhibited pathways associated with non-specific microbial infections via a CD14-dependent mechanism, suppressed expression of LRP-1 and protected the BBB from oxidative stress via NRF2 (NFE2L2) signalling. CONCLUSIONS Together, these results suggest gut-derived microbial metabolites interact with the BBB, representing a fourth facet of the gut-brain axis that warrants further attention.
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Affiliation(s)
- Lesley Hoyles
- Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Imperial College London, London, UK.
| | - Tom Snelling
- Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Imperial College London, London, UK
| | - Umm-Kulthum Umlai
- Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Imperial College London, London, UK
| | - Jeremy K Nicholson
- Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Imperial College London, London, UK
| | - Simon R Carding
- Norwich Medical School, University of East Anglia, Norwich, UK
- The Gut Health and Food Safety Research Programme, The Quadram Institute, Norwich Research Park, Norwich, UK
| | - Robert C Glen
- Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Imperial College London, London, UK
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Simon McArthur
- Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Blizard Institute, Queen Mary University of London, London, UK.
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Abstract
PURPOSE OF REVIEW The influence of gut bacteria upon host physiology is increasingly recognized, but mechanistic links are lacking. Diseases of energetic imbalance such as obesity and diabetes represent major risk factors for cardiovascular diseases such as hypertension. Thus, here, we review current mechanistic contributions of the gut microbiota to host energetics. RECENT FINDINGS Gut bacteria generate a multitude of small molecules which can signal to host tissues within and beyond the gastrointestinal tract to influence host physiology, and gut bacteria can also influence host digestive efficiency by altering the bioavailability of polysaccharides, yet the quantitative energetic effects of these processes remain unclear. Recently, our team has demonstrated that gut bacteria constitute a major anaerobic thermogenic biomass, which can quantitatively account for obesity. Quantitative understanding of the mechanisms by which gut bacteria influence energy homeostasis may ultimately inform the relationship between gut bacteria and cardiovascular dysfunction.
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166
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Affiliation(s)
- Leszek Szablewski
- Medical University of Warsaw, Department of General Biology and Parasitology, Warsaw, Poland
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167
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Abstract
The gastrointestinal tract represents the largest interface between the human body and the external environment. It must continuously monitor and discriminate between nutrients that need to be assimilated and harmful substances that need to be expelled. The different cells of the gut epithelium are therefore equipped with a subtle chemosensory system that communicates the sensory information to several effector systems involved in the regulation of appetite, immune responses, and gastrointestinal motility. Disturbances or adaptations in the communication of this sensory information may contribute to the development or maintenance of disease. This is a new emerging research field in which perception of taste can be considered as a novel key player participating in the regulation of gut function. Specific diets or agonists that target these chemosensory signaling pathways may be considered as new therapeutic targets to tune adequate physiological processes in the gut in health and disease.
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Affiliation(s)
- S Steensels
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, 3000 Leuven, Belgium;
| | - I Depoortere
- Translational Research Center for Gastrointestinal Disorders, KU Leuven, 3000 Leuven, Belgium;
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168
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Abot A, Lucas A, Bautzova T, Bessac A, Fournel A, Le-Gonidec S, Valet P, Moro C, Cani PD, Knauf C. Galanin enhances systemic glucose metabolism through enteric Nitric Oxide Synthase-expressed neurons. Mol Metab 2018; 10:100-108. [PMID: 29428595 PMCID: PMC5985240 DOI: 10.1016/j.molmet.2018.01.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/12/2018] [Accepted: 01/23/2018] [Indexed: 12/14/2022] Open
Abstract
Objective Decreasing duodenal contraction is now considered as a major focus for the treatment of type 2 diabetes. Therefore, identifying bioactive molecules able to target the enteric nervous system, which controls the motility of intestinal smooth muscle cells, represents a new therapeutic avenue. For this reason, we chose to study the impact of oral galanin on this system in diabetic mice. Methods Enteric neurotransmission, duodenal contraction, glucose absorption, modification of gut–brain axis, and glucose metabolism (glucose tolerance, insulinemia, glucose entry in tissue, hepatic glucose metabolism) were assessed. Results We show that galanin, a neuropeptide expressed in the small intestine, decreases duodenal contraction by stimulating nitric oxide release from enteric neurons. This is associated with modification of hypothalamic nitric oxide release that favors glucose uptake in metabolic tissues such as skeletal muscle, liver, and adipose tissue. Oral chronic gavage with galanin in diabetic mice increases insulin sensitivity, which is associated with an improvement of several metabolic parameters such as glucose tolerance, fasting blood glucose, and insulin. Conclusion Here, we demonstrate that oral galanin administration improves glucose homeostasis via the enteric nervous system and could be considered a therapeutic potential for the treatment of T2D. Targeting the enteric nervous system (ENS) is an innovative solution to treat diabetes. The ENS controls duodenal contractions to modulate glycemia via the gut–brain axis. ENS/contractions are targeted by the neuropeptide galanin in the intestine. Oral galanin treatment decreases duodenal hyper-contractility in diabetic mice. Oral galanin restores the gut–brain axis to improve glycemia in diabetic mice.
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Affiliation(s)
- Anne Abot
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1220, Université Paul Sabatier, UPS, Institut de Recherche en Santé Digestive et Nutrition (IRSD), CHU Purpan, Place du Docteur Baylac, CS 60039, 31024 Toulouse Cedex 3, France; NeuroMicrobiota, European Associated Laboratory (EAL) INSERM/UCL, France
| | - Alexandre Lucas
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Université Paul Sabatier, UPS, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), CHU Rangueil, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 4, France
| | - Tereza Bautzova
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1220, Université Paul Sabatier, UPS, Institut de Recherche en Santé Digestive et Nutrition (IRSD), CHU Purpan, Place du Docteur Baylac, CS 60039, 31024 Toulouse Cedex 3, France; NeuroMicrobiota, European Associated Laboratory (EAL) INSERM/UCL, France
| | - Arnaud Bessac
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1220, Université Paul Sabatier, UPS, Institut de Recherche en Santé Digestive et Nutrition (IRSD), CHU Purpan, Place du Docteur Baylac, CS 60039, 31024 Toulouse Cedex 3, France; NeuroMicrobiota, European Associated Laboratory (EAL) INSERM/UCL, France
| | - Audren Fournel
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1220, Université Paul Sabatier, UPS, Institut de Recherche en Santé Digestive et Nutrition (IRSD), CHU Purpan, Place du Docteur Baylac, CS 60039, 31024 Toulouse Cedex 3, France; NeuroMicrobiota, European Associated Laboratory (EAL) INSERM/UCL, France
| | - Sophie Le-Gonidec
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Université Paul Sabatier, UPS, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), CHU Rangueil, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 4, France
| | - Philippe Valet
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Université Paul Sabatier, UPS, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), CHU Rangueil, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 4, France
| | - Cédric Moro
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Université Paul Sabatier, UPS, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), CHU Rangueil, 1 Avenue Jean Poulhès, BP84225, 31432 Toulouse Cedex 4, France
| | - Patrice D Cani
- NeuroMicrobiota, European Associated Laboratory (EAL) INSERM/UCL, France; Université Catholique de Louvain (UCL), Louvain Drug Research Institute, LDRI, Metabolism and Nutrition Research Group, WELBIO (Walloon Excellence in Life sciences and BIOtechnology), Avenue E. Mounier, 73 B1.73.11, B-1200, Brussels, Belgium.
| | - Claude Knauf
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1220, Université Paul Sabatier, UPS, Institut de Recherche en Santé Digestive et Nutrition (IRSD), CHU Purpan, Place du Docteur Baylac, CS 60039, 31024 Toulouse Cedex 3, France; NeuroMicrobiota, European Associated Laboratory (EAL) INSERM/UCL, France.
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169
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Worthington JJ, Reimann F, Gribble FM. Enteroendocrine cells-sensory sentinels of the intestinal environment and orchestrators of mucosal immunity. Mucosal Immunol 2018; 11:3-20. [PMID: 28853441 DOI: 10.1038/mi.2017.73] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 07/14/2017] [Indexed: 02/06/2023]
Abstract
The intestinal epithelium must balance efficient absorption of nutrients with partitioning commensals and pathogens from the bodies' largest immune system. If this crucial barrier fails, inappropriate immune responses can result in inflammatory bowel disease or chronic infection. Enteroendocrine cells represent 1% of this epithelium and have classically been studied for their detection of nutrients and release of peptide hormones to mediate digestion. Intriguingly, enteroendocrine cells are the key sensors of microbial metabolites, can release cytokines in response to pathogen associated molecules and peptide hormone receptors are expressed on numerous intestinal immune cells; thus enteroendocrine cells are uniquely equipped to be crucial and novel orchestrators of intestinal inflammation. In this review, we introduce enteroendocrine chemosensory roles, summarize studies correlating enteroendocrine perturbations with intestinal inflammation and describe the mechanistic interactions by which enteroendocrine and mucosal immune cells interact during disease; highlighting this immunoendocrine axis as a key aspect of innate immunity.
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Affiliation(s)
- J J Worthington
- Lancaster University, Faculty of Health and Medicine, Division of Biomedical and Life Sciences, Lancaster, Lancashire, UK
| | - F Reimann
- University of Cambridge, Metabolic Research Laboratories, Wellcome Trust/MRC Institute of Metabolic Science & MRC Metabolic Diseases Unit, Addenbrooke's Hospital, Cambridge, UK
| | - F M Gribble
- University of Cambridge, Metabolic Research Laboratories, Wellcome Trust/MRC Institute of Metabolic Science & MRC Metabolic Diseases Unit, Addenbrooke's Hospital, Cambridge, UK
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170
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Zhao L, Chen Y, Xia F, Abudukerimu B, Zhang W, Guo Y, Wang N, Lu Y. A Glucagon-Like Peptide-1 Receptor Agonist Lowers Weight by Modulating the Structure of Gut Microbiota. Front Endocrinol (Lausanne) 2018; 9:233. [PMID: 29867765 PMCID: PMC5966539 DOI: 10.3389/fendo.2018.00233] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/23/2018] [Indexed: 12/11/2022] Open
Abstract
In addition to improving glucose metabolism, liraglutide, a glucagon-like peptide-1 receptor agonist, has weight-loss effects. The underlying mechanisms are not completely understood. This study was performed to explore whether liraglutide could lower weight by modulating the composition of the gut microbiota in simple obese and diabetic obese rats. In our study, Wistar and Goto-Kakizaki (GK) rats were randomly treated with liraglutide or normal saline for 12 weeks. The biochemical parameters and metabolic hormones were measured. Hepatic glucose production and lipid metabolism were also assessed with isotope tracers. Changes in gut microbiota were analyzed by 16S rRNA gene sequencing. Both glucose and lipid metabolism were significantly improved by liraglutide. Liraglutide lowered body weight independent of glycemia status. The abundance and diversity of gut microbiota were considerably decreased by liraglutide. Liraglutide also decreased obesity-related microbial phenotypes and increased lean-related phenotypes. In conclusion, liraglutide can prevent weight gain by modulating the gut microbiota composition in both simple obese and diabetic obese subjects.
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Affiliation(s)
| | | | | | | | | | - Yuyu Guo
- *Correspondence: Yuyu Guo, ; Ningjian Wang, ; Yingli Lu,
| | - Ningjian Wang
- *Correspondence: Yuyu Guo, ; Ningjian Wang, ; Yingli Lu,
| | - Yingli Lu
- *Correspondence: Yuyu Guo, ; Ningjian Wang, ; Yingli Lu,
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171
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Bubnov RV, Babenko LP, Lazarenko LM, Mokrozub VV, Demchenko OA, Nechypurenko OV, Spivak MY. Comparative study of probiotic effects of Lactobacillus and Bifidobacteria strains on cholesterol levels, liver morphology and the gut microbiota in obese mice. EPMA J 2017; 8:357-376. [PMID: 29209439 PMCID: PMC5700021 DOI: 10.1007/s13167-017-0117-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 08/18/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND Microbiome-modulating interventions are promising for treatment and prevention of metabolic syndrome. The number of probiotic strains demonstrated ability to decrease cholesterol level in vivo, however, it was poorly confirmed in a clinical setting. The aim was to study the effects of L. acidophilus IMV B-7279, L. casei IMV B-7280, B. animalіs VKL and B. animalіs VKB separately and in various compositions on the level of serum cholesterol, gut microbiota contents and liver morphology on a high-calorie-induced obesity model in BALB/c mice. MATERIALS AND METHODS We used for the study female BALB/c mice 6-8 weeks old (18-24 g). Experimental animals were fed by a fat-enriched diet (FED), and 8 experimental groups were formed (12 mice in each group) to test strains of probiotic bacteria L. delbrueckii subsp. bulgaricus IMV B-7281, L. casei IMV B-7280, B. animalіs VKL and B. animalіs VKB and compositions. We used ultrasound for in vivo assessment of the liver and visceral (mesenteric) fat size. In the blood serum of the obese mice, the level of cholesterol was estimated. The liver morphology and gut microbiota of obese mice were studied. RESULTS We revealed that after treatment with all of the studied probiotic bacteria and compositions of B. animalis VKL/B. animalis VKB/L. casei IMV B-7280, the weight of obese mice decreased, and cholesterol and its fraction levels in serum were reduced. The size of the liver slightly decreased after treatment with L. delbrueckii subsp. bulgaricus IMV B-7281, B. аnimalis VKB or probiotic compositions; we observed reduction of the mesenteric fat size after injection of all these probiotic bacteria (separately) and probiotic compositions. We defined the strain-dependent effects on serum lipid profiles, liver morphology and the gut microbiota. The B. animalis VKL/B. animalis VKB/L. casei IMV B-7280 composition effectively recovered the liver morphological structure of obese mice. The number of Lactobacillus spp., Bifidobacterium spp. and coliform bacteria increased, the number of staphylococci and streptococci reduced, and the number of microscopic fungi significantly decreased in the gut of obese mice after treatment with L. casei IMV B-7280, L. delbrueckii subsp. bulgaricus IMV B-7281, B. animalis (separately) or their compositions. CONCLUSION L. casei IMV B-7280 (separately) and a composition of B. animalis VKL/B. animalis VKB/L. casei IMV B-7280 are effective at decreasing the weight of obese mice, decreasing cholesterol level, restoring the liver morphology and beneficially modulating the gut microbiome in high-calorie-induced obesity.
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Affiliation(s)
- Rostyslav V. Bubnov
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
- Clinical Hospital ‘Pheophania’ of State Affairs Department, Zabolotny str., 21, Kyiv, 03143 Ukraine
| | - Lidiia P. Babenko
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
| | - Liudmyla M. Lazarenko
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
| | - Viktoria V. Mokrozub
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
| | - Oleksandr A. Demchenko
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
| | - Oleksiy V. Nechypurenko
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
| | - Mykola Ya. Spivak
- Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Zabolotny Str., 154, Kyiv, 03143 Ukraine
- LCL ‘DIAPROF’, Svitlycky Str., 35, Kyiv, 04123 Ukraine
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172
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Shin NR, Bose S, Wang JH, Ansari A, Lim SK, Chin YW, Choi HS, Kim H. Flos Lonicera Combined with Metformin Ameliorates Hepatosteatosis and Glucose Intolerance in Association with Gut Microbiota Modulation. Front Microbiol 2017; 8:2271. [PMID: 29204141 PMCID: PMC5698303 DOI: 10.3389/fmicb.2017.02271] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 11/03/2017] [Indexed: 12/27/2022] Open
Abstract
The gut microbiota is important in energy contribution, metabolism and immune modulation, and compositional disruption of the gut microbiota population is closely associated with chronic metabolic diseases like type 2 diabetes (T2D) and non-alcoholic fatty liver disease (NAFLD). Metformin (MET) and Flos Lonicera (FL) are common treatments for metabolic diseases in Western and Oriental medicinal fields. We evaluated the effect of treatment with FL and MET in combination on hepatosteatosis, glucose tolerance, and gut microbial composition. FL and MET were administered to Otsuka Long-Evans Tokushima Fatty (OLETF) rats, an animal model of genetic T2D and NAFLD. The FL+MET treatment reduced liver weight, serum cholesterol, insulin resistance, and hepatic MDA level and modulated the gut microbial composition. More specifically, the genera of Prevotella and Lactobacillus were negatively associated with the body and liver weights, hepatic TG and TC content, and serum insulin level. However, the relative abundance of these genera decreased in response to the FL+MET treatment. Interestingly, pathway prediction data revealed that the FL+MET treatment attenuated lipopolysaccharide-related pathways, in keeping with the decrease in serum and fecal endotoxin levels. FL and MET in combination exerts a synergistic effect on the improvement of hepatosteatosis and insulin sensitivity in OLETF rats, and modulates gut microbiota in association with the effect.
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Affiliation(s)
- Na R Shin
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, Goyang, South Korea
| | | | - Jing-Hua Wang
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, Goyang, South Korea
| | - AbuZar Ansari
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, Goyang, South Korea
| | - Soo-Kyoung Lim
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, Goyang, South Korea
| | - Young-Won Chin
- College of Pharmacy, Dongguk University, Goyang, South Korea
| | - Han-Seok Choi
- Department of Endocrinology, Dongguk University, Goyang, South Korea
| | - Hojun Kim
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, Goyang, South Korea
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173
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Ramírez-Pérez O, Cruz-Ramón V, Chinchilla-López P, Méndez-Sánchez N. The Role of the Gut Microbiota in Bile Acid Metabolism. Ann Hepatol 2017; 16 Suppl 1:S21-S26. [PMID: 31196631 DOI: 10.5604/01.3001.0010.5672] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 09/09/2017] [Indexed: 02/04/2023]
Abstract
The gut microbiota has been considered a cornerstone of maintaining the health status of its human host because it not only facilitates harvesting of nutrients and energy from ingested food, but also produces numerous metabolites that can regulate host metabolism. One such class of metabolites, the bile acids, are synthesized from cholesterol in the liver and further metabolized by the gut microbiota into secondary bile acids. These bioconversions modulate the signaling properties of bile acids through the nuclear farnesoid X receptor and the G protein-coupled membrane receptor 5, which regulate diverse metabolic pathways in the host. In addition, bile acids can regulate gut microbial composition both directly and indirectly by activation of innate immune response genes in the small intestine. Therefore, host metabolism can be affected by both microbial modifications of bile acids, which leads to altered signaling via bile acid receptors, and by alterations in the composition of the microbiota. In this review, we mainly describe the interactions between bile acids and intestinal microbiota and their roles in regulating host metabolism, but we also examine the impact of bile acid composition in the gut on the intestinal microbiome and on host physiology.
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Affiliation(s)
| | - Vania Cruz-Ramón
- Liver Research Unit, Medica Sur Clinic & Foundation, Mexico City, Mexico
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174
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Lerner A, Neidhöfer S, Matthias T. The Gut Microbiome Feelings of the Brain: A Perspective for Non-Microbiologists. Microorganisms 2017; 5:E66. [PMID: 29023380 PMCID: PMC5748575 DOI: 10.3390/microorganisms5040066] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/28/2017] [Accepted: 10/09/2017] [Indexed: 02/06/2023] Open
Abstract
Objectives: To comprehensively review the scientific knowledge on the gut-brain axis. Methods: Various publications on the gut-brain axis, until 31 July 2017, were screened using the Medline, Google, and Cochrane Library databases. The search was performed using the following keywords: "gut-brain axis", "gut-microbiota-brain axis", "nutrition microbiome/microbiota", "enteric nervous system", "enteric glial cells/network", "gut-brain pathways", "microbiome immune system", "microbiome neuroendocrine system" and "intestinal/gut/enteric neuropeptides". Relevant articles were selected and reviewed. Results: Tremendous progress has been made in exploring the interactions between nutrients, the microbiome, and the intestinal, epithelium-enteric nervous, endocrine and immune systems and the brain. The basis of the gut-brain axis comprises of an array of multichannel sensing and trafficking pathways that are suggested to convey the enteric signals to the brain. These are mediated by neuroanatomy (represented by the vagal and spinal afferent neurons), the neuroendocrine-hypothalamic-pituitary-adrenal (HPA) axis (represented by the gut hormones), immune routes (represented by multiple cytokines), microbially-derived neurotransmitters, and finally the gate keepers of the intestinal and brain barriers. Their mutual and harmonious but intricate interaction is essential for human life and brain performance. However, a failure in the interaction leads to a number of inflammatory-, autoimmune-, neurodegenerative-, metabolic-, mood-, behavioral-, cognitive-, autism-spectrum-, stress- and pain-related disorders. The limited availability of information on the mechanisms, pathways and cause-and-effect relationships hinders us from translating and implementing the knowledge from the bench to the clinic. Implications: Further understanding of this intricate field might potentially shed light on novel preventive and therapeutic strategies to combat these disorders. Nutritional approaches, microbiome manipulations, enteric and brain barrier reinforcement and sensing and trafficking modulation might improve physical and mental health outcomes.
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Affiliation(s)
- Aaron Lerner
- B. Rappaport School of Medicine, Technion-Israel Institute of Technology, Bat Galim, Haifa 3200003, Israel.
- AESKU.KIPP Institute, Mikroforum Ring 2, 55234 Wendelsheim, Germany.
| | - Sandra Neidhöfer
- AESKU.KIPP Institute, Mikroforum Ring 2, 55234 Wendelsheim, Germany.
| | - Torsten Matthias
- AESKU.KIPP Institute, Mikroforum Ring 2, 55234 Wendelsheim, Germany.
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175
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Houttuynia cordata Facilitates Metformin on Ameliorating Insulin Resistance Associated with Gut Microbiota Alteration in OLETF Rats. Genes (Basel) 2017; 8:genes8100239. [PMID: 28937612 PMCID: PMC5664089 DOI: 10.3390/genes8100239] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 09/18/2017] [Accepted: 09/19/2017] [Indexed: 12/26/2022] Open
Abstract
Metformin and Houttuynia cordata are representative anti-diabetic therapeutics in western and oriental medicine, respectively. The current study examined the synergistic anti-diabetic effect of Houttuynia cordata extraction (HCE) and metformin combination in Otsuka Long–Evans Tokushima Fatty (OLETF) rats. Fecal microbiota were analyzed by denaturing gradient gel electrophoresis (DGGE) and real-time PCR. Combining HCE + metformin resulted in significantly ameliorated glucose tolerance (oral glucose tolerance test (OGTT))—the same as metformin alone. Particularly, results of the insulin tolerance test (ITT) showed that combining HCE + metformin dramatically improved insulin sensitivity as compared to metformin treatment alone. Both fecal and serum endotoxin, as well as cytokines (tumor necrosis factor α (TNF-α) and interleukin 6 (IL-6)) were significantly ameliorated by HCE + metformin compared to metformin alone. Meanwhile, the activation of AMPK (adenosine monophosphate-activated protein kinase) by metformin was distinctly enhanced by HCE. Both of HCE and metformin evidently changed the gut microbiota composition, causing the alteration of bacterial metabolite, like short-chain fatty acids. H. cordata, together with metformin, exerts intensive sensibilization to insulin; the corresponding mechanisms are associated with alleviation of endotoxemia via regulation of gut microbiota, particularly Roseburia, Akkermansia, and Gram-negative bacterium.
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176
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Bagarolli RA, Tobar N, Oliveira AG, Araújo TG, Carvalho BM, Rocha GZ, Vecina JF, Calisto K, Guadagnini D, Prada PO, Santos A, Saad STO, Saad MJA. Probiotics modulate gut microbiota and improve insulin sensitivity in DIO mice. J Nutr Biochem 2017; 50:16-25. [PMID: 28968517 DOI: 10.1016/j.jnutbio.2017.08.006] [Citation(s) in RCA: 164] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 07/05/2017] [Accepted: 08/17/2017] [Indexed: 02/06/2023]
Abstract
Obesity and type 2 diabetes are characterized by subclinical inflammatory process. Changes in composition or modulation of the gut microbiota may play an important role in the obesity-associated inflammatory process. In the current study, we evaluated the effects of probiotics (Lactobacillus rhamnosus, L. acidophilus and Bifidobacterium bifidumi) on gut microbiota, changes in permeability, and insulin sensitivity and signaling in high-fat diet and control animals. More importantly, we investigated the effects of these gut modulations on hypothalamic control of food intake, and insulin and leptin signaling. Swiss mice were submitted to a high-fat diet (HFD) with probiotics or pair-feeding for 5 weeks. Metagenome analyses were performed on DNA samples from mouse feces. Blood was drawn to determine levels of glucose, insulin, LPS, cytokines and GLP-1. Liver, muscle, ileum and hypothalamus tissue proteins were analyzed by Western blotting and real-time polymerase chain reaction. In addition, liver and adipose tissues were analyzed using histology and immunohistochemistry. The HFD induced huge alterations in gut microbiota accompanied by increased intestinal permeability, LPS translocation and systemic low-grade inflammation, resulting in decreased glucose tolerance and hyperphagic behavior. All these obesity-related features were reversed by changes in the gut microbiota profile induced by probiotics. Probiotics also induced an improvement in hypothalamic insulin and leptin resistance. Our data demonstrate that the intestinal microbiome is a key modulator of inflammatory and metabolic pathways in both peripheral and central tissues. These findings shed light on probiotics as an important tool to prevent and treat patients with obesity and insulin resistance.
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Affiliation(s)
- Renata A Bagarolli
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Natália Tobar
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Alexandre G Oliveira
- Department of Physical Education, São Paulo State University (UNESP), Bioscience Institute, Rio Claro, SP, Brazil
| | - Tiago G Araújo
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Bruno M Carvalho
- Department of Biology Science, Federal University of Pernambuco, Recife, PE, Brazil
| | - Guilherme Z Rocha
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Juliana F Vecina
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Kelly Calisto
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Dioze Guadagnini
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Patrícia O Prada
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Andrey Santos
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Sara T O Saad
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil
| | - Mario J A Saad
- Department of Internal Medicine, State University of Campinas, 13081-970, Campinas, SP, Brazil.
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177
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Turroni S, Brigidi P, Cavalli A, Candela M. Microbiota–Host Transgenomic Metabolism, Bioactive Molecules from the Inside. J Med Chem 2017; 61:47-61. [DOI: 10.1021/acs.jmedchem.7b00244] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Silvia Turroni
- Department
of Pharmacy and Biotechnology, University of Bologna, Via Belmeloro
6, 40126 Bologna, Italy
| | - Patrizia Brigidi
- Department
of Pharmacy and Biotechnology, University of Bologna, Via Belmeloro
6, 40126 Bologna, Italy
| | - Andrea Cavalli
- Department
of Pharmacy and Biotechnology, University of Bologna, Via Belmeloro
6, 40126 Bologna, Italy
- Compunet, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy
| | - Marco Candela
- Department
of Pharmacy and Biotechnology, University of Bologna, Via Belmeloro
6, 40126 Bologna, Italy
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178
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Li W, Richard D. Effects of Bariatric Surgery on Energy Homeostasis. Can J Diabetes 2017; 41:426-431. [DOI: 10.1016/j.jcjd.2017.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 04/11/2017] [Accepted: 05/04/2017] [Indexed: 12/11/2022]
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179
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de Cossío LF, Fourrier C, Sauvant J, Everard A, Capuron L, Cani PD, Layé S, Castanon N. Impact of prebiotics on metabolic and behavioral alterations in a mouse model of metabolic syndrome. Brain Behav Immun 2017; 64:33-49. [PMID: 28027925 DOI: 10.1016/j.bbi.2016.12.022] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 12/09/2016] [Accepted: 12/22/2016] [Indexed: 02/08/2023] Open
Abstract
Mounting evidence shows that the gut microbiota, an important player within the gut-brain communication axis, can affect metabolism, inflammation, brain function and behavior. Interestingly, gut microbiota composition is known to be altered in patients with metabolic syndrome (MetS), who also often display neuropsychiatric symptoms. The use of prebiotics, which beneficially alters the microbiota, may therefore be a promising way to potentially improve physical and mental health in MetS patients. This hypothesis was tested in a mouse model of MetS, namely the obese and type-2 diabetic db/db mice, which display emotional and cognitive alterations associated with changes in gut microbiota composition and hippocampal inflammation compared to their lean db/+ littermates. We assessed the impact of chronic administration (8weeks) of prebiotics (oligofructose) on both metabolic (body weight, food intake, glucose homeostasis) and behavioral (increased anxiety-like behavior and impaired spatial memory) alterations characterizing db/db mice, as well as related neurobiological correlates, with particular attention to neuroinflammatory processes. Prebiotic administration improved excessive food intake and glycemic dysregulations (glucose tolerance and insulin resistance) in db/db mice. This was accompanied by an increase of plasma anti-inflammatory cytokine IL-10 levels and hypothalamic mRNA expression of the anorexigenic cytokine IL-1β, whereas unbalanced mRNA expression of hypothalamic orexigenic (NPY) and anorexigenic (CART, POMC) peptides was unchanged. We also detected signs of improved blood-brain-barrier integrity in the hypothalamus of oligofructose-treated db/db mice (normalized expression of tight junction proteins ZO-1 and occludin). On the contrary, prebiotic administration did not improve behavioral alterations and associated reduction of hippocampal neurogenesis displayed by db/db mice, despite normalization of increased hippocampal IL-6 mRNA expression. Of note, we found a relationship between the effect of treatment on dentate gyrus neurons and spatial memory. These findings may prove valuable for introducing novel approaches to treat some of the comorbidities associated with MetS.
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Affiliation(s)
- Lourdes Fernández de Cossío
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Célia Fourrier
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Julie Sauvant
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Amandine Everard
- Université catholique de Louvain, Louvain Drug Research Institute, WELBIO (Walloon Excellence in Life Sciences and Biotechnology), Metabolism and Nutrition Research Group, 1200 Brussels, Belgium
| | - Lucile Capuron
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Patrice D Cani
- Université catholique de Louvain, Louvain Drug Research Institute, WELBIO (Walloon Excellence in Life Sciences and Biotechnology), Metabolism and Nutrition Research Group, 1200 Brussels, Belgium
| | - Sophie Layé
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France
| | - Nathalie Castanon
- INRA, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France; Université de Bordeaux, Nutrition and Integrative Neurobiology, UMR 1286, 33076 Bordeaux, France.
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180
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Is a “gut full” of bad bugs driving metabolic disease in shift workers? Sleep Med Rev 2017; 34:1-2. [DOI: 10.1016/j.smrv.2017.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 01/29/2017] [Indexed: 01/20/2023]
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181
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Bachmann R, Leonard D, Delzenne N, Kartheuser A, Cani PD. Novel insight into the role of microbiota in colorectal surgery. Gut 2017; 66:738-749. [PMID: 28153961 DOI: 10.1136/gutjnl-2016-312569] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/21/2016] [Accepted: 12/24/2016] [Indexed: 12/12/2022]
Abstract
Recent literature undeniably supports the idea that the microbiota has a strong influence on the healing process of an intestinal anastomosis. Understanding the mechanisms by which the bacterial community of the gut influences intestinal healing could open the door for new preventive and therapeutic approaches. Among the different mechanisms, data have shown that the production of specific reactive oxygen species (ROS) and the activation of specific formyl peptide receptors (FPRs) regulate intestinal wound healing. Evidence suggests that specific gut microbes such as Lactobacillus spp and Akkermansia muciniphila help to regulate healing processes through both ROS-dependent and FPR-dependent mechanisms. In this review, we will discuss the current knowledge and future perspectives concerning the impact of microbiota on wound healing. We will further review available evidence on whether mechanical bowel preparation and the use of specific antibiotics are beneficial or harmful procedures, an ongoing matter of debate. These practices have a profound effect on the gut microbiota composition at the level of both the mucosal and the luminal compartments. Therefore, a key question remains unanswered: should we continue to prepare the gut before surgical intervention? Current knowledge and data do not clearly support the use of one technique or another to avoid complications such as anastomotic leak. There is an urgent need for appropriate interventions with a deep microbiota analysis to investigate both the surgical technical benefits of a proper anastomosis compared with the potential effect of the gut microbes (beneficial vs harmful) on the processes of wound healing and anastomotic leakage reduction.
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Affiliation(s)
- Radu Bachmann
- Colorectal Surgery Unit, Cliniques universitaires Saint-Luc, Brussels, Belgium.,Cliniques des Pathologies Tumorales du Colon et de Rectum (CPTCR), Institut Roi Albert II, Cliniques universitaires Saint Luc, Brussels, Belgium
| | - Daniel Leonard
- Colorectal Surgery Unit, Cliniques universitaires Saint-Luc, Brussels, Belgium.,Cliniques des Pathologies Tumorales du Colon et de Rectum (CPTCR), Institut Roi Albert II, Cliniques universitaires Saint Luc, Brussels, Belgium
| | - Nathalie Delzenne
- Université catholique de Louvain, Louvain Drug Research Institute, Metabolism and Nutrition research group, Brussels, Belgium
| | - Alex Kartheuser
- Colorectal Surgery Unit, Cliniques universitaires Saint-Luc, Brussels, Belgium.,Cliniques des Pathologies Tumorales du Colon et de Rectum (CPTCR), Institut Roi Albert II, Cliniques universitaires Saint Luc, Brussels, Belgium
| | - Patrice D Cani
- Université catholique de Louvain, Louvain Drug Research Institute, Metabolism and Nutrition research group, Brussels, Belgium.,WELBIO (Walloon Excellence in Life sciences and BIOtechnology), Brussels, Belgium
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182
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Wen Y, He Q, Ding J, Wang H, Hou Q, Zheng Y, Li C, Ma Y, Zhang H, Kwok LY. Cow, yak, and camel milk diets differentially modulated the systemic immunity and fecal microbiota of rats. Sci Bull (Beijing) 2017; 62:405-414. [PMID: 36659284 DOI: 10.1016/j.scib.2017.01.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 12/28/2016] [Accepted: 12/30/2016] [Indexed: 01/21/2023]
Abstract
Cow milk is most widely consumed; however, non-cattle milk has gained increasing interest because of added nutritive values. We compared the health effects of yak, cow, and camel milk in rats. By measuring several plasma immune factors, significantly more interferon-γ was detected in the camel than the yak (P=0.0020) or cow (P=0.0062) milk group. Significantly more IgM was detected in the yak milk than the control group (P=0.0071). The control group had significantly less interleukin 6 than the yak (P=0.0499) and cow (P=0.0248) milk groups. The fecal microbiota of the 144 samples comprised mainly of the Firmicutes (76.70±11.03%), Bacteroidetes (15.27±7.79%), Proteobacteria (3.61±4.34%), and Tenericutes (2.61±2.53%) phyla. Multivariate analyses revealed a mild shift in the fecal microbiota along the milk treatment. We further identified the differential microbes across the four groups. At day 14, 22 and 28 differential genera and species were identified (P=0.0000-0.0462), while 8 and 11 differential genera and species (P=0.0000-0.0013) were found at day 28. Some short-chain fatty acid and succinate producers increased, while certain health-concerned bacteria (Prevotella copri, Phascolarctobacterium faecium, and Bacteroides uniformis) decreased after 14days of yak or camel milk treatment. We demonstrated that different animal milk could confer distinctive nutritive value to the host.
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Affiliation(s)
- Yongping Wen
- Inner Mongolia Mengniu Dairy (Group) Co., Ltd, Hohhot 011500, China
| | - Qiuwen He
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Jia Ding
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Huiyan Wang
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Qiangchuan Hou
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Yi Zheng
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Changkun Li
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Yuzhu Ma
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Heping Zhang
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Lai-Yu Kwok
- Key Laboratory of Dairy Biotechnology and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.
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183
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Foster JA, Rinaman L, Cryan JF. Stress & the gut-brain axis: Regulation by the microbiome. Neurobiol Stress 2017; 7:124-136. [PMID: 29276734 PMCID: PMC5736941 DOI: 10.1016/j.ynstr.2017.03.001] [Citation(s) in RCA: 602] [Impact Index Per Article: 86.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/16/2017] [Accepted: 03/02/2017] [Indexed: 12/11/2022] Open
Abstract
The importance of the gut–brain axis in regulating stress-related responses has long been appreciated. More recently, the microbiota has emerged as a key player in the control of this axis, especially during conditions of stress provoked by real or perceived homeostatic challenge. Diet is one of the most important modifying factors of the microbiota-gut-brain axis. The routes of communication between the microbiota and brain are slowly being unravelled, and include the vagus nerve, gut hormone signaling, the immune system, tryptophan metabolism, and microbial metabolites such as short chain fatty acids. The importance of the early life gut microbiota in shaping later health outcomes also is emerging. Results from preclinical studies indicate that alterations of the early microbial composition by way of antibiotic exposure, lack of breastfeeding, birth by Caesarean section, infection, stress exposure, and other environmental influences - coupled with the influence of host genetics - can result in long-term modulation of stress-related physiology and behaviour. The gut microbiota has been implicated in a variety of stress-related conditions including anxiety, depression and irritable bowel syndrome, although this is largely based on animal studies or correlative analysis in patient populations. Additional research in humans is sorely needed to reveal the relative impact and causal contribution of the microbiome to stress-related disorders. In this regard, the concept of psychobiotics is being developed and refined to encompass methods of targeting the microbiota in order to positively impact mental health outcomes. At the 2016 Neurobiology of Stress Workshop in Newport Beach, CA, a group of experts presented the symposium “The Microbiome: Development, Stress, and Disease”. This report summarizes and builds upon some of the key concepts in that symposium within the context of how microbiota might influence the neurobiology of stress.
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Affiliation(s)
- Jane A Foster
- Department of Psychiatry & Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada
| | - Linda Rinaman
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA, United States
| | - John F Cryan
- APC Microbiome Institute, University College Cork, Cork, Ireland.,Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
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184
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Menni C, Jackson MA, Pallister T, Steves CJ, Spector TD, Valdes AM. Gut microbiome diversity and high-fibre intake are related to lower long-term weight gain. Int J Obes (Lond) 2017; 41:1099-1105. [PMID: 28286339 PMCID: PMC5500185 DOI: 10.1038/ijo.2017.66] [Citation(s) in RCA: 224] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 02/15/2017] [Accepted: 03/05/2017] [Indexed: 12/16/2022]
Abstract
Background: Cross-sectional studies suggest that the microbes in the human gut have a role in obesity by influencing the human body’s ability to extract and store calories. The aim of this study was to assess if there is a correlation between change in body weight over time and gut microbiome composition. Methods: We analysed 16S ribosomal RNA gene sequence data derived from the faecal samples of 1632 healthy females from TwinsUK to investigate the association between gut microbiome measured cross-sectionally and longitudinal weight gain (adjusted for caloric intake and baseline body mass index). Dietary fibre intake was investigated as a possible modifier. Results: Less than half of the variation in long-term weight change was found to be heritable (h2=0.41 (0.31, 0.47)). Gut microbiota diversity was negatively associated with long-term weight gain, whereas it was positively correlated with fibre intake. Nine bacterial operational taxonomic units (OTUs) were significantly associated with weight gain after adjusting for covariates, family relatedness and multiple testing (false discovery rate <0.05). OTUs associated with lower long-term weight gain included those assigned to Ruminococcaceae (associated in mice with improved energy metabolism) and Lachnospiraceae. A Bacterioides species OTU was associated with increased risk of weight gain but this appears to be driven by its correlation with lower levels of diversity. Conclusions: High gut microbiome diversity, high-fibre intake and OTUs implicated in animal models of improved energy metabolism are all correlated with lower term weight gain in humans independently of calorie intake and other confounders.
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Affiliation(s)
- C Menni
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - M A Jackson
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - T Pallister
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - C J Steves
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - T D Spector
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - A M Valdes
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK.,Academic Rheumatology, University of Nottingham, Nottingham, UK
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185
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Mazzoli R, Riedel K, Pessione E. Editorial: Bioactive Compounds from Microbes. Front Microbiol 2017; 8:392. [PMID: 28337192 PMCID: PMC5340747 DOI: 10.3389/fmicb.2017.00392] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 02/24/2017] [Indexed: 12/21/2022] Open
Affiliation(s)
- Roberto Mazzoli
- Laboratory of Microbial and Applied Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, University of Turin Turin, Italy
| | - Katharina Riedel
- Department for Microbial Physiology and Molecular Biology, Institute of Microbiology, University of Greifswald Greifswald, Germany
| | - Enrica Pessione
- Laboratory of Microbial and Applied Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, University of Turin Turin, Italy
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186
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187
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Tilg H, Cani PD, Mayer EA. Gut microbiome and liver diseases. Gut 2016; 65:2035-2044. [PMID: 27802157 DOI: 10.1136/gutjnl-2016-312729] [Citation(s) in RCA: 313] [Impact Index Per Article: 39.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 09/13/2016] [Accepted: 09/16/2016] [Indexed: 12/20/2022]
Abstract
The gut microbiota has recently evolved as a new important player in the pathophysiology of many intestinal and extraintestinal diseases. The liver is the organ which is in closest contact with the intestinal tract, and is exposed to a substantial amount of bacterial components and metabolites. Various liver disorders such as alcoholic liver disease, non-alcoholic liver disease and primary sclerosing cholangitis have been associated with an altered microbiome. This dysbiosis may influence the degree of hepatic steatosis, inflammation and fibrosis through multiple interactions with the host's immune system and other cell types. Whereas few results from clinical metagenomic studies in liver disease are available, evidence is accumulating that in liver cirrhosis an oral microbiome is overrepresented in the lower intestinal tract, potentially contributing to disease process and severity. A major role for the gut microbiota in liver disorders is also supported by the accumulating evidence that several complications of severe liver disease such as hepatic encephalopathy are efficiently treated by various prebiotics, probiotics and antibiotics. A better understanding of the gut microbiota and its components in liver diseases might provide a more complete picture of these complex disorders and also form the basis for novel therapies.
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Affiliation(s)
- Herbert Tilg
- Department of Internal Medicine I, Gastroenterology, Hepatology & Endocrinology, Medical University Innsbruck, Innsbruck, Austria
| | - Patrice D Cani
- WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, Metabolism and Nutrition Research Group, Université catholique de Louvain, Brussels, Belgium
| | - Emeran A Mayer
- Division of Digestive Diseases, G. Oppenheimer Center for Neurobiology of Stress and Resilience, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
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188
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Mazzoli R, Pessione E. The Neuro-endocrinological Role of Microbial Glutamate and GABA Signaling. Front Microbiol 2016; 7:1934. [PMID: 27965654 PMCID: PMC5127831 DOI: 10.3389/fmicb.2016.01934] [Citation(s) in RCA: 204] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 11/17/2016] [Indexed: 12/11/2022] Open
Abstract
Gut microbiota provides the host with multiple functions (e.g., by contributing to food digestion, vitamin supplementation, and defense against pathogenic strains) and interacts with the host organism through both direct contact (e.g., through surface antigens) and soluble molecules, which are produced by the microbial metabolism. The existence of the so-called gut–brain axis of bi-directional communication between the gastrointestinal tract and the central nervous system (CNS) also supports a communication pathway between the gut microbiota and neural circuits of the host, including the CNS. An increasing body of evidence has shown that gut microbiota is able to modulate gut and brain functions, including the mood, cognitive functions, and behavior of humans. Nonetheless, given the extreme complexity of this communication network, its comprehension is still at its early stage. The present contribution will attempt to provide a state-of-the art description of the mechanisms by which gut microbiota can affect the gut–brain axis and the multiple cellular and molecular communication circuits (i.e., neural, immune, and humoral). In this context, special attention will be paid to the microbial strains that produce bioactive compounds and display ascertained or potential probiotic activity. Several neuroactive molecules (e.g., catecholamines, histamine, serotonin, and trace amines) will be considered, with special focus on Glu and GABA circuits, receptors, and signaling. From the basic science viewpoint, “microbial endocrinology” deals with those theories in which neurochemicals, produced by both multicellular organisms and prokaryotes (e.g., serotonin, GABA, glutamate), are considered as a common shared language that enables interkingdom communication. With regards to its application, research in this area opens the way toward the possibility of the future use of neuroactive molecule-producing probiotics as therapeutic agents for the treatment of neurogastroenteric and/or psychiatric disorders.
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Affiliation(s)
- Roberto Mazzoli
- Laboratory of Biochemistry, Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino Torino, Italy
| | - Enrica Pessione
- Laboratory of Biochemistry, Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino Torino, Italy
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189
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Ansari A, Bose S, Yadav MK, Wang JH, Song YK, Ko SG, Kim H. CST, an Herbal Formula, Exerts Anti-Obesity Effects through Brain-Gut-Adipose Tissue Axis Modulation in High-Fat Diet Fed Mice. Molecules 2016; 21:E1522. [PMID: 27845741 PMCID: PMC6274029 DOI: 10.3390/molecules21111522] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/01/2016] [Accepted: 11/09/2016] [Indexed: 02/07/2023] Open
Abstract
The brain, gut, and adipose tissue interact to control metabolic pathways, and impairment in the brain-gut-adipose axis can lead to metabolic disorders, including obesity. Chowiseungcheng-tang (CST), a herbal formulation, is frequently used to treat metabolic disorders. Here, we investigated the anti-obesity effect of CST and its link with brain-gut-adipose axis using C57BL/6J mice as a model. The animals were provided with a normal research diet (NRD) or high-fat diet (HFD) in absence or presence of CST or orlistat (ORL) for 12 weeks. CST had a significant anti-obesity effect on a number of vital metabolic and obesity-related parameters in HFD-fed mice. CST significantly decreased the expression levels of genes encoding obesity-promoting neuropeptides (agouti-related peptide, neuropeptide Y), and increased the mRNA levels of obesity-suppressing neuropeptides (proopiomelanocortin, cocaine-and amphetamine-regulated transcript) in the hypothalamus. CST also effectively decreased the expression level of gene encoding obesity-promoting adipokine (retinol-binding protein-4) and increased the mRNA level of obesity-suppressing adipokine (adiponectin) in visceral adipose tissue (VAT). Additionally, CST altered the gut microbial composition in HFD groups, a phenomenon strongly associated with key metabolic parameters, neuropeptides, and adipokines. Our findings reveal that the anti-obesity impact of CST is mediated through modulation of metabolism-related neuropeptides, adipokines, and gut microbial composition.
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Affiliation(s)
- AbuZar Ansari
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, 814-Siksa-dong, Goyang, Gyeonggi-do 10326, South Korea.
| | - Shambhunath Bose
- NosQuest, 463-400 USPACE 1A-1103, Daewang Pangyoro 660, Bundanggu, Seongnamsi, Gyeonggi-do 13494, South Korea.
| | - Mukesh Kumar Yadav
- Department of Otorhinolaryngology Head and Neck Surgery & Institute for Medical Device Clinical Trials, College of Medicine, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, South Korea.
| | - Jing-Hua Wang
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, 814-Siksa-dong, Goyang, Gyeonggi-do 10326, South Korea.
| | - Yun-Kyung Song
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Gachon University, Incheon 22318, South Korea.
| | - Seong-Gyu Ko
- Department of Preventive Medicine, College of Korean Medicine, Kyunghee University, Seoul 02453, South Korea.
| | - Hojun Kim
- Department of Rehabilitation Medicine of Korean Medicine, Dongguk University, 814-Siksa-dong, Goyang, Gyeonggi-do 10326, South Korea.
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190
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Benedict C, Vogel H, Jonas W, Woting A, Blaut M, Schürmann A, Cedernaes J. Gut microbiota and glucometabolic alterations in response to recurrent partial sleep deprivation in normal-weight young individuals. Mol Metab 2016; 5:1175-1186. [PMID: 27900260 PMCID: PMC5123208 DOI: 10.1016/j.molmet.2016.10.003] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 10/13/2016] [Accepted: 10/18/2016] [Indexed: 12/13/2022] Open
Abstract
Objective Changes to the microbial community in the human gut have been proposed to promote metabolic disturbances that also occur after short periods of sleep loss (including insulin resistance). However, whether sleep loss affects the gut microbiota remains unknown. Methods In a randomized within-subject crossover study utilizing a standardized in-lab protocol (with fixed meal times and exercise schedules), we studied nine normal-weight men at two occasions: after two nights of partial sleep deprivation (PSD; sleep opportunity 02:45–07:00 h), and after two nights of normal sleep (NS; sleep opportunity 22:30–07:00 h). Fecal samples were collected within 24 h before, and after two in-lab nights, of either NS or PSD. In addition, participants underwent an oral glucose tolerance test following each sleep intervention. Results Microbiota composition analysis (V4 16S rRNA gene sequencing) revealed that after two days of PSD vs. after two days of NS, individuals exhibited an increased Firmicutes:Bacteroidetes ratio, higher abundances of the families Coriobacteriaceae and Erysipelotrichaceae, and lower abundance of Tenericutes (all P < 0.05) – previously all associated with metabolic perturbations in animal or human models. However, no PSD vs. NS effect on beta diversity or on fecal short-chain fatty acid concentrations was found. Fasting and postprandial insulin sensitivity decreased after PSD vs. NS (all P < 0.05). Discussion Our findings demonstrate that short-term sleep loss induces subtle effects on human microbiota. To what extent the observed changes to the microbial community contribute to metabolic consequences of sleep loss warrants further investigations in larger and more prolonged sleep studies, to also assess how sleep loss impacts the microbiota in individuals who already are metabolically compromised. Possibly the first results of how short sleep impacts the human gut microbiota. Two nights of short sleep do not significantly impact beta diversity. The Firmicutes to Bacteroidetes ratio is significantly affected by sleep loss. Fecal short-chain fatty acid levels do not change depending on sleep duration. Increased insulin resistance after sleep loss is unrelated to alterations in the microbiota.
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Key Words
- Bacteroidetes
- F:B, Firmicutes:Bacteroidetes (ratio)
- Firmicutes
- HDL, high-density lipoprotein
- HOMA-IR, homeostatic assessment model of insulin resistance
- Insulin resistance
- Intestinal microbiome
- LDL, low-density lipoprotein
- NS, normal sleep
- OGTT, oral glucose tolerance test
- OTU, Operational Taxonomic Units
- PERMANOVA, permutational analysis of variance
- PSD, partial sleep deprivation
- SCFA, short-chain fatty acid
- Short-chain fatty acid
- Sleep restriction
- T2DM, type-2 diabetes mellitus
- d2, day 2
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Affiliation(s)
| | - Heike Vogel
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
| | - Wenke Jonas
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
| | - Anni Woting
- Department of Gastrointestinal Microbiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Michael Blaut
- Department of Gastrointestinal Microbiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Annette Schürmann
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
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Fang X, Wang X, Yang S, Meng F, Wang X, Wei H, Chen T. Evaluation of the Microbial Diversity in Amyotrophic Lateral Sclerosis Using High-Throughput Sequencing. Front Microbiol 2016; 7:1479. [PMID: 27703453 PMCID: PMC5028383 DOI: 10.3389/fmicb.2016.01479] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/05/2016] [Indexed: 12/15/2022] Open
Abstract
More and more evidences indicate that diseases of the central nervous system have been seriously affected by fecal microbes. However, little work is done to explore interaction between amyotrophic lateral sclerosis (ALS) and fecal microbes. In the present study, high-throughput sequencing method was used to compare the intestinal microbial diversity of healthy people and ALS patients. The principal coordinate analysis, Venn and unweighted pair-group method using arithmetic averages (UPGMA) showed an obvious microbial changes between healthy people (group H) and ALS patients (group A), and the average ratios of Bacteroides, Faecalibacterium, Anaerostipes, Prevotella, Escherichia, and Lachnospira at genus level between ALS patients and healthy people were 0.78, 2.18, 3.41, 0.35, 0.79, and 13.07. Furthermore, the decreased Firmicutes/Bacteroidetes ratio at phylum level using LEfSE (LDA > 4.0), together with the significant increased genus Dorea (harmful microorganisms) and significant reduced genus Oscillibacter, Anaerostipes, Lachnospiraceae (beneficial microorganisms) in ALS patients, indicated that the imbalance in intestinal microflora constitution had a strong association with the pathogenesis of ALS.
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Affiliation(s)
- Xin Fang
- Department of Neurology, The First Affiliated Hospital of Nanchang University Nanchang, China
| | - Xin Wang
- Institute of Translational Medicine, Nanchang University Nanchang, China
| | - Shaoguo Yang
- Institute of Translational Medicine, Nanchang University Nanchang, China
| | - Fanjing Meng
- Institute of Translational Medicine, Nanchang University Nanchang, China
| | - Xiaolei Wang
- Institute of Translational Medicine, Nanchang University Nanchang, China
| | - Hua Wei
- State Key Laboratory of Food Science and Technology, Nanchang University Nanchang, China
| | - Tingtao Chen
- Institute of Translational Medicine, Nanchang University Nanchang, China
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