The intestine has several means for maintaining immune homeostasis and for avoiding inflammation despite massive antigenic stimulation by food components and by commensal bacteria residing in the gut mucosa. These mechanisms include physical and biological barriers such as (i) the intestinal epithelial barrier (IEB); (ii) the gut vascular barrier (GVB) and (iii) the mucus layer. In particular, the mucus layer does not simply act as a diffusion barrier but has important dynamic functions that regulate the type of commensal bacteria residing in the inner mucus layer, enabling the passage of food and bacterial products into the gut tissue and systemic circulation. Importantly, the mucosal layer also has key immune regulatory functions. A healthy mucus structure is fundamental for promoting the presence of beneficial commensal bacteria, such as the short-chain fatty acids (SCFA)-producing bacteria which are known to promote immune tolerance. Moreover, the mucus layer contains anti-microbial peptides (AMPs) and mucins that have key immune modulatory functions. The integrated response of these combined defense systems is fundamental for containing microbes and their products within the intestine; for avoiding their systemic spread and for suppressing their capacity to activate systemic immune and autoimmune responses.

This is the first comprehensive volume to look at the importance of short-chain fatty acids in digestion, the function of the large intestine and their role in human health. Short-chain fatty acids are the major product of bacterial fermentation of dietary carbohydrates in the human and animal large intestine. They represent the major end products of digestive processes occurring in the caecum and large intestine. As such, they form an important dietary component and it is increasingly recognised that they may have a significant role in protecting against large bowel cancer and in metabolism. Prepared by an international team of contributors who are at the forefront of this area of research, this volume will be an essential source of reference for gastroenterologists, nutritionists and others active in this area.

Microbial endocrinology represents a newly emerging interdisciplinary field that is formed by the intersection of the fields of neurobiology and microbiology. This book will introduce a new perspective to the current understanding not only of the factors that mediate the ability of microbes to cause disease, but also to the mechanisms that maintain normal homeostasis. The discovery that microbes can directly respond to neuroendocrine hormones, as evidenced by increased growth and production of virulence-associated factors, provides for a new framework with which to investigate how microorganisms interface not only with vertebrates, but also with invertebrates and even plants. The reader will learn that the neuroendocrine hormones that one most commonly associates with mammals are actually found throughout the plant, insect and microbial communities to an extent that will undoubtedly surprise many, and most importantly, how interactions between microbes and neuroendocrine hormones can influence the pathophysiology of infectious disease.

In this book the recent advancements in understanding the gut-brain interaction as well as gut microbiome and how this interaction plays a vital role in human health and disease are discussed. Each chapter gives an analysis of questions, research directions, and methods within the field of gut-brain axis. The readers will benefit from the latest knowledge about our understanding about how gut-brain axis and modulation of gut microbiome determines predisposition to neurological disorders. The multidisciplinary book is essential reading for anyone interested in the field of gut-brain axis and gut microbiome: from undergraduates to graduate students as well as scientists and physicians having an interest in the new exciting field of gut microbiome and its relationship with brain function.

This book focusses on the latest results related to the field of bile acids as signaling molecules and describes how these receptors have become a major pharmacological target. It covers all major areas of research in this field, from genetics, chemistry, in silico modeling, molecular biology to clinical applications, offering a cross-country view of the functional role of bile acids as signaling molecules, virtually acting on all major areas of metabolism. While FXR and GPBAR1 are essential bile acid sensors that integrate the de novo bile acid synthesis with intestinal microbiota and liver metabolism, in a broader sense, BARs play a pathogenic role in the development of common human alignments including liver, intestinal and metabolic disorders, such as steatosis (NAFLD) and steato-hepatitis (NASH), diabetes, obesity and atherosclerosis.

The treatment of inflammatory bowel disease (IBD) has posed a major challenge since its appearance. Biomedical researchers, physicians, gastroenterologists, and surgeons have struggled to improve the quality of life of their patients and have sought, above all else, to keep the disease under remission for as long as possible. Blockers for tumoral necrosis factor alpha (TNF-alpha) were the first biological drugs to be discovered and for this reason they played a crucial role in the subsequent evolution of IBD treatment. The aim of this book is to provide an overview of such drugs and the latest developments in IBD immunopathology. Our contributors discuss the main indications, efficacy, and possible side effects of the different types of drugs available today for IBD treatment.

The enteric nervous system (ENS) is a complex neural network embedded in the gut wall that orchestrates the reflex behaviors of the intestine. The ENS is often referred to as the “little brain” in the gut because the ENS is more similar in size, complexity and autonomy to the central nervous system (CNS) than other components of the autonomic nervous system. Like the brain, the ENS is composed of neurons that are surrounded by glial cells. Enteric glia are a unique type of peripheral glia that are similar to astrocytes of the CNS. Yet enteric glial cells also differ from astrocytes in many important ways. The roles of enteric glial cell populations in the gut are beginning to come to light and recent evidence implicates enteric glia in almost every aspect of gastrointestinal physiology and pathophysiology. However, elucidating the exact mechanisms by which enteric glia influence gastrointestinal physiology and identifying how those roles are altered during gastrointestinal pathophysiology remain areas of intense research. The purpose of this e-book is to provide an introduction to enteric glial cells and to act as a resource for ongoing studies on this fascinating population of glia. Table of Contents: Introduction / A Historical Perspective on Enteric Glia / Enteric Glia: The Astroglia of the Gut / Molecular Composition of Enteric Glia / Development of Enteric Glia / Functional Roles of Enteric Glia / Enteric Glia and Disease Processes in the Gut / Concluding Remarks / References / Author Biography