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Author: Kieran Tuohy Publisher: Academic Press ISBN: 0124079415 Category : Medical Languages : en Pages : 268
Book Description
Drawing on expert opinions from the fields of nutrition, gut microbiology, mammalian physiology, and immunology, Diet-Microbe Interactions for Human Health investigates the evidence for a unified disease mechanism working through the gut and its resident microbiota, and linking many inflammation-related chronic diet associated diseases. State of the art post-genomic studies can highlight the important role played by our resident intestinal microbiota in determining human health and disease. Many chronic human diseases associated with modern lifestyles and diets — including those localized to the intestinal tract like inflammatory bowel disease and celiac disease, and more pervasive systemic conditions such as obesity, diabetes and cardiovascular disease — are characterized by aberrant profiles of gut bacteria or their metabolites. Many of these diseases have an inflammatory basis, often presenting with a chronic low-grade systemic inflammation, hinting at persistent and inappropriate activation of inflammatory pathways. Through the presentation and analysis of recent nutrition studies, this book discusses the possible mechanisms underpinning the disease processes associated with these pathologies, with high fat diets appearing to predispose to disease, and biologically active plant components, mainly fiber and polyphenols, appearing to reduce the risk of chronic disease development. One comprehensive, translational source for all aspects of nutrition and diet's effect on gastrointestinal health and disease Experts in nutrition, diet, microbiology and immunology take readers from the bench research (cellular and biochemical mechanisms of vitamins and nutrients) to new preventive and therapeutic approaches Clear presentations by leading researchers of the cellular mechanisms underlying diet, immune response, and gastrointestinal disease help practicing nutritionists and clinicians (gastroenterologists, endocrinologists) map out new areas for clinical research and structuring clinical recommendations
Author: Kieran Tuohy Publisher: Academic Press ISBN: 0124079415 Category : Medical Languages : en Pages : 268
Book Description
Drawing on expert opinions from the fields of nutrition, gut microbiology, mammalian physiology, and immunology, Diet-Microbe Interactions for Human Health investigates the evidence for a unified disease mechanism working through the gut and its resident microbiota, and linking many inflammation-related chronic diet associated diseases. State of the art post-genomic studies can highlight the important role played by our resident intestinal microbiota in determining human health and disease. Many chronic human diseases associated with modern lifestyles and diets — including those localized to the intestinal tract like inflammatory bowel disease and celiac disease, and more pervasive systemic conditions such as obesity, diabetes and cardiovascular disease — are characterized by aberrant profiles of gut bacteria or their metabolites. Many of these diseases have an inflammatory basis, often presenting with a chronic low-grade systemic inflammation, hinting at persistent and inappropriate activation of inflammatory pathways. Through the presentation and analysis of recent nutrition studies, this book discusses the possible mechanisms underpinning the disease processes associated with these pathologies, with high fat diets appearing to predispose to disease, and biologically active plant components, mainly fiber and polyphenols, appearing to reduce the risk of chronic disease development. One comprehensive, translational source for all aspects of nutrition and diet's effect on gastrointestinal health and disease Experts in nutrition, diet, microbiology and immunology take readers from the bench research (cellular and biochemical mechanisms of vitamins and nutrients) to new preventive and therapeutic approaches Clear presentations by leading researchers of the cellular mechanisms underlying diet, immune response, and gastrointestinal disease help practicing nutritionists and clinicians (gastroenterologists, endocrinologists) map out new areas for clinical research and structuring clinical recommendations
Author: Food Forum Publisher: National Academies Press ISBN: 030926586X Category : Medical Languages : en Pages : 197
Book Description
The Food Forum convened a public workshop on February 22-23, 2012, to explore current and emerging knowledge of the human microbiome, its role in human health, its interaction with the diet, and the translation of new research findings into tools and products that improve the nutritional quality of the food supply. The Human Microbiome, Diet, and Health: Workshop Summary summarizes the presentations and discussions that took place during the workshop. Over the two day workshop, several themes covered included: The microbiome is integral to human physiology, health, and disease. The microbiome is arguably the most intimate connection that humans have with their external environment, mostly through diet. Given the emerging nature of research on the microbiome, some important methodology issues might still have to be resolved with respect to undersampling and a lack of causal and mechanistic studies. Dietary interventions intended to have an impact on host biology via their impact on the microbiome are being developed, and the market for these products is seeing tremendous success. However, the current regulatory framework poses challenges to industry interest and investment.
Author: Matthias Scholz Publisher: ISBN: Category : Languages : en Pages :
Book Description
Introduction: The gut microbiome has attracted much attention in the last decade due to new studies and technologies revealing how gut microbes play a key role in human health and disease risk. However, we still know little about how diets, foods and nutrients shape the gut microbiome.Materials and Methods:To expand our knowledge about the complex relationship between nutrient intake and intestinal bacteria, we performed a broad dietary study covering diverse foods and nutrient intakes of nearly 100 adults. We analyzed metataxonomic data from 16S rRNA sequencing and correlated the microbial abundances of the top 55 dominant taxonomic groups with collected intakes of 40 food groups and 44 nutritional parameters, as well as degree of adherence to healthy eating patterns. Based on Spearman correlation profiles and hierarchical clustering, we also identified food groups and nutritional parameters that modulate in a similar manner microbial community structure.Results: We will present preliminary results showing direct effects of specific dietary patterns (e.g. adherence to the Mediterranean style diet), food groups (e.g., fruits, nuts, dairy) and nutrients (e.g. iron, magnesium, zinc) on specific genera of the gut microbiota. We found significant associations between alcohol and the bacterial genus Holdemania. We will show that food groups supposed to belong to the same higher-level food category do not always show the expected effect on the gut microbes, which supports the need for a detailed food classification scheme to investigate dietary effects. Similarly, we found that correlations at dietary and higher food group levels more consistently reflect existing diet:microbe associations from the literature while correlations at the nutrient level are prone to confounding factors only apparent at higher alimentary ontology.Discussion: Our study aims at a more complete understanding of the complex relations between human diet and gut microbiome community structure. Initial results confirm that both the quantity of a nutrient and the dietary source of a nutrient can both influence associations with gut bacteria. Our results may help to define new strategies for modelling diet:microbe interactions in the gut providing a new valuable tool to assist the nutrition and gut microbiome communities.Conflict of interest:There is no conflict of interest.
Author: Heli Jaime Barron Pastor Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Host-microbe interactions are now considered essential for maintaining host health. It is known that short and long term dietary interventions influences the structure and activity of gut bacterial communities. However, our understanding of the forces shaping the gut microbiota is still limited and controversial, and most of the studies of the gut microbiota use the microbiota from faeces as a proxy for the intestinal tract populations. As such, the overarching aim of this thesis is to contribute to the understanding of host-microbiome interactions using an animal model. In this thesis I describe the effect of diet changes on microbial community structure and host-microbiome interactions following 14 weeks on one of the three experimental diets. The diets consisted of a basal diet low in fibre (LF); the basal diet together with 26% cellulose; a difficult to ferment fibre (HF); and the basal diet together with 50% dried cooked red kidney beans (B); a diet relatively high in easily fermentable fibre. These diets were fed to 45, 21 day old female Wistar rats originating from 6 litters for 14 weeks. Diet had little effect on rat growth rates or adult body mass. However, diet had profound effects on gastro-intestinal morphology and dynamics. Caecum size was smallest in animals fed the LF diet, and caecums were about 2x as large in animals fed the B diet, while animals on the HF diet had intermediate-sized caecums. Food transit times were slowest in animals on the B and LF diets and fastest in animals on the HF diets. At the end of the diet experiment, colon and caecum contents were collected when the animals were killed and short chain fatty acids, nitrogen, carbon, as well fibre concentrations were determined. These data showed that the 'chemical' environment of the hindgut varied substantially among animals fed the different diets. E. coli diversity and dynamics were described by characterizing more than three thousand isolates. E. coli diversity was low, and more than 97% of the isolates were represent by three strains: one phylogroup B2 strain and two phylogroup B1 strains. A decline of the frequency of the B2 strain in the animals fed on the bean diet was observed. The faecal microbiota was characterized when the animals were 21 days old, while faecal, caecal and rectal microbial communities characterized at the end of the experiment. 16S amplicon sequencing of the V4 region on the Ion Torrent platform was the approach used to characterize the microbiota. Members of 23 microbial families were detected in communities of the animals before and after 14 weeks on the experimental diets. At the start of the experiment there were significant litter membership effects on the structure of the faecal microbial communities. After 14 weeks on the experimental diets, both litter and diet explained a significant amount of the variation in microbial community structure. There were substantial differences in the microbial communities of the caecum and rectum and the extent of these differences depended on diet and on the time taken for material to move through the hindgut. The outcomes of the present study make a contribution to our understanding of the factors that shape gut microbial communities. Microbial characterization of faecal samples is frequently used as proxy of gut microbiota. However, stool samples are probably most likely representative of the microbial communities in the rectum than other parts of the gastrointestinal tract. Indeed, the findings also throw doubt on the value of faecal community characterization as a means to understand community structure and function in the gastro-intestinal tract. Further, the results of these experiments suggest that efforts attempting to achieve positive health outcomes through diet manipulation may have limited success in general due to among individual differences in microbial community composition, and in how these different communities respond to dietary manipulation.
Author: Jie Yin Publisher: Frontiers Media SA ISBN: 2889639983 Category : Science Languages : en Pages : 595
Book Description
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Author: Ana Maria R. Moise Publisher: Bloomsbury Publishing USA ISBN: Category : Health & Fitness Languages : en Pages : 247
Book Description
This accessibly written, comprehensive summary of research findings on the gut microbiome and its implications for health and disease—a topic of growing interest and concern—serves as an essential resource for teachers and students. Most people know that the digestive tract contains billions of helpful gut bacteria, but how does the gut microbiome affect our health? What exactly do these bacteria do, and what are the negative effects when these microorganisms are harmed by what we eat and do? What impacts might they have on conditions such as irritable bowel syndrome (IBS), obesity, and autism? This book provides an accessible, holistic introduction to the study of the human gut microbiome and its effects on digestion and disease—one of the newest and most rapidly expanding fields in medicine today. The gut microbiome is known as "the forgotten organ" because it is not identified as part of the human body per se, yet it has an immense influence on many systems in the body. The Gut Microbiome: Exploring the Connection between Microbes, Diet, and Health explains what the microbiome is, the many functions it serves, how it can be either harmed or supported by our actions, and the role it may play in various diseases and in determining our overall health. The book examines the various potential causes of imbalance in the microbiome, such as diet and other lifestyle factors, and then identifies strategies for improving human health by protecting the gut microbiota. The science-based information is detailed but accessible to general readers or students without extensive background knowledge.
Author: Joseph F Pierre Publisher: Royal Society of Chemistry ISBN: 178801748X Category : Science Languages : en Pages : 213
Book Description
Bringing together expert researchers in the fields of microbiome, metabolism, and nutrition research, this book compiles the current state of knowledge from authorities specifically on how diet regulates microbial function with metabolic implications for the human host. Chapters cover the broad concepts of microbial-host interactions under the dietary influences of specific macronutrients, micronutrients, small molecule generation and bile acid circulation, with inclusion of later clinical chapters encompassing topics like bariatric surgery and our current understanding of probiotics, prebiotics, and synbiotics. Covering a timely topic from a functional standpoint, the book fills a gap in the existing literature. While increased attention is placed on descriptive work, it will importantly highlight emerging functional and mechanistic research findings that illustrate the inner workings of the dietary-microbial-host orchestration of metabolic regulation. Providing an exciting summary of the importance of current microbial function, it will also summarize the next major directions in the field of microbiome research.
Author: M. Andrea Azcarate-Peril Publisher: Springer Nature ISBN: 3030287378 Category : Technology & Engineering Languages : en Pages : 367
Book Description
This book examines the role of fermented foods on human gut health and offers a unique contribution to this rapidly growing area of study. Fermented foods have been consumed by humans for millennia. This method of food preservation provided early humans with beneficial bacteria that re-populated the gut microbiota upon consumption. However, novel methods of production and conservation of food have led to severed ties between the food that modern humans consume and the gut microbiota. As a consequence, there has been a documented increase in the prevalence of autoimmune diseases and obesity, which has been correlated to decreased diversity of gut microbes, while infectious disorders have decreased in the three past decades. With the intention of providing a thorough overview of the relationship between fermented foods, nutrition, and health, the editors have grouped the chapters into three thematic sections: food and their associated microbes, the oral microbiome, and the gut microbiome. After an introduction dedicated to the environmental microbiome, Part I provides an overview of what is currently known about the microbes associated with different foods, and compares traditional forms of food preparation with current industrial techniques in terms of the potential loss of microbial diversity. The chapters in Part 2 explore the oral microbiota as a microbial gatekeeper and main contributor to the gut microbiota. Part 3 introduces beneficial modulators of the gut microbiome starting with the establishment of a healthy gut microbiota during infancy, and continuing with the role of probiotics and prebiotics in health preservation and the imbalances of the gut microbiota. In the final section the editors offer concluding remarks and provide a view of the future brought by the microbiome research revolution. This study is unique in its emphasis on the convergence of two very relevant fields of research: the field of studies on Lactic Acid Bacteria (LAB) and fermented foods, and microbiome research. The relationship between these fields, as presented by the research in this volume, demonstrates the intimate connection between fermented foods, the oral and gut microbiota, and human health. Although research has been done on the impact of diet on the gut microbiome there are no publications addressing the restorative role of food as microbe provider to the gut microbiota. This novel approach makes the edited volume a key resource for scientific researchers working in this field.