The Functional Roles Of Histamine Receptors

Research in the field of histamine receptors over the past 100 years went hand-in-hand with the development of modern pharmacology. Advances in histamine research led by outstanding scientists was so incisive that the clinical approach to treat allergies and gastrointestinal ailments was revolutionized. The pharmacological treatment of peptic ulcer and gastroesophageal reflux was indeed a revolution, as it ended the surgical intervention. Interest in histamine pharmacology was resurrected by the discovery of another histamine receptor, number 4, using genomics-based reverse pharmacological approaches for screening orphan GPCRs. This receptor is preferentially expressed by immune cells and its discovery raised hopes for its translational exploitation as a new therapeutic target for unmet medical needs ranging from asthma to cancer. However, several drawbacks emerged and dramatically slowed down research in the field. A better understanding of receptor intra-and interspecies heterogeneity will certainly improve and accelerate the translation of experimental data into clinical practice. Also, the plethora of data on brain histamine is hinting at a fundamental role of this system as a hub that receives internal and peripheral stimuli to allocate the necessary excitation to specific brain circuits that preside the appropriate behavioral responses. The development of new histaminergic ligands is an ongoing process that constantly provide new preclinical tools. The aim of this book is to cover the most important aspects of histamine receptor function and pharmacology in the central nervous system and to provide a comprehensive overview of the preclinical and clinical advances made in recent decades and the exciting prospects for the future. It highlights the clinical areas where there is a great need for new therapeutic approaches and where novel histaminergic agents may be useful for personalized medicine.

A comprehensive and detailed overview of the current state of preclinical research on histamine and histamine receptors. Part of the book focuses on novel approaches to the study of histamine receptors such as polymorphism, genetic linkage, and computational analysis, and on the use of new histaminergic ligands in diseases such as asthma and dermatitis. Several chapters will be devoted to the role of histamine in the control of homeostatic and behavioral responses such as the sleep-wake cycle, regulation of the blood brain barrier, food intake, alertness, itch, and memory formation and consolidation.

Brain aminergic pathways are organized in parallel and interacting systems, which support a range of functions, from homoeostatic regulations to cognitive, and motivational processes. Despite overlapping functional influences, dopamine, serotonin, noradrenaline and histamine systems provide different contributions to these processes. The histaminergic system, long ignored as a major regulator of the sleep-wake cycle, has now been fully acknowledged also as a major coordinator of attention, learning and memory, decision making. Although histaminergic neurons project widely to the whole brain, they are functionally heterogeneous, a feature which may provide the substrate for differential regulation, in a region-specific manner, of other neurotransmitter systems. Neurochemical preclinical studies have clearly shown that histamine interacts and modulates the release of neurotransmitters that are recognized as major modulators of cognitive processing and motivated behaviours. As a consequence, the histamine system has been proposed as a therapeutic target to treat sleep-wake disorders and cognitive dysfunctions that accompany neurodegenerative and neuroinflammatory pathologies. Last decades have witnessed an unexpected explosion of interest in brain histamine system, as new receptors have been discovered and selective ligands synthesised. Nevertheless, the complete picture of the histamine systems fine-tuning and its orchestration with other pathways remains rather elusive. This Research Topic is intended to offer an inter-disciplinary forum that will improve our current understanding of the role of brain histamine and provide the fundamentals necessary to drive innovation in clinical practice and to improve the management and treatment of neurological disorders.

Since its identification by Sir Henry H. Dale a century ago, histamine has become one of the most important multifunctional biogenic amines in the field of biomedicine. The pharmacological effects of histamine are mediated through four types of membrane histamine receptors; H1R, H2R, H3R and H4R, which are all heptahelical G-protein-coupled receptors. It has been known to play the broadest spectrum of activities in various physiological and pathological conditions including cell proliferation, differentiation, hematopoiesis, embryonic development, regeneration, wound healing, aminergic neurotransmission and numerous brain functions, secretion of pituitary hormones, regulation of gastrointestinal and circulatory functions, cardiovascular system, as well as inflammatory reactions, modulation of the immune response, endocrine function and homeostasis, and other important areas. This book is a compendium of the current state of established and investigational literature on Histamine, its receptors and their Agonists and antagonists. It provides a comprehensive overview of histamine biology in the field of biochemistry, cell biology, molecular biology, immunology, allergy, neurobiology, pharmacology, microbiology and reproductive biology. The first section on Histamine biology and physiology leads into subsequent sections on enzymology, pharmacology, regulation of the immune system and cell proliferation and role in allergic and other diseases including acid peptic diseases, inflammatory diseases, autoimmune and cancer diseases, nervous system, reproductive functions and hematopoiesis. The compilation of chapters in the book presents the most recent advances in histamine research and bridges the basic and clinical aspects of histamine biology.

Reveals an Emerging Avenue of Potential Treatments for a Host of Challenging Diseases and Disorders The H3 receptor is known to play a major role in a range of CNS disorders, including those affecting cognitive functions such as ADHD and Alzheimer’s disease, as well as sleep disorders, obesity, epilepsy, schizophrenia, depression, and neurodegeneration. In light of dramatic advances in research at the molecular level, supported by impressive clinical studies, optimism remains high that an H3 receptor-related drug could hit the market soon. The Third Histamine Receptor: Selective Ligands as Potential Therapeutic Agents in CNS Disorders provides a thorough grounding in advances made over the last two decades. It brings together an elite group of 30 pioneering researchers. In writing about their own work, these scientists report on the cutting-edge investigations that are now being conducted across a variety of disciplines. This text is designed to aid researchers and inform those involved in the treatment and clinical aspects of a number of histamine-related diseases. Presents Several Disease-Specific Chapters Certainly, the most comprehensive and cutting-edge volume in the field, this text includes material drawn from groundbreaking research techniques and patent literature. Put together with great thought and passion, it is written to serve as a primary resource for anyone involved with or interested in the identification and localization of H3 receptors and the ligands being developed as therapeutic agents to treat a wide range of diseases including some that were once considered intractable.

This ​book provides a comprehensive overview on current histamine and histamine receptor research in context of human health and disease and reflect the multidisciplinary nature of the field. While the editors realize that it is almost impossible to cover the field completely within the constraints of a single HEP volume, nonetheless, all important aspects will be covered in one way or the other. An overarching introductory chapter will link the individual chapters and provide an overview on the field. This chapter will also link the book to the previous HEP volume on histamine receptors and the recent HEP volume on the pharmacology of itch. Great attention will be paid to complementation of existing literature while avoiding undue duplication. The book will cover new methods for analysis of histamine and histamine metabolites, development of methods for histamine receptor analysis, signal transduction, histamine release, regulation of immune cells by histamine, histamine metabolism and associated diseases, regulation of major organ systems by histamine and development of new drugs and experimental tools for the study of histamine receptors.

Histamine, discovered in 1910 by the British physiologist Sir Henry H. Dale, has become one of the most important biogenic amines in medicine and biology. In addition to the three well-known functions such as the contraction of smooth muscles, the increase in vascular permeability, and the stimulation of gastric acid secretion, histamine has been known to play various roles in neurotransmission, immunomodulation, the regulation of cell proliferation, etc. This book provides a comprehensive overview of histamine biology including structure, anabolic and catabolic enzymes, receptors and their ligands. It outlines the details of histamine physiology such as its role in the immune response, nutrition and neuro/psychobiology, and covers medical fields like allergy, gastroenterology, oncology, sepsis, posttraumatic stress, embryonic development and hematopoiesis. Also considered is the structural and functional genomics of histamine. Presenting the most recent advances in histamine research from basic science to clinical medicine, this book is a valuable source for students, graduates and postgraduates in medicine and the life sciences, and to anyone interested in this multifaceted molecule.

Synthesizes the latest information and research involving the pharmacochemistry, biochemical properties and neurobiological function of histamine receptors. Contains over 50 illustrations.