Histamine Receptors as Drug Targets

Download Histamine Receptors as Drug Targets PDF Online Free

Author :
Publisher : Humana
ISBN 13 : 9781493968411
Total Pages : 0 pages
Book Rating : 4.9/5 (684 download)

DOWNLOAD NOW!


Book Synopsis Histamine Receptors as Drug Targets by : Ekaterini Tiligada

Download or read book Histamine Receptors as Drug Targets written by Ekaterini Tiligada and published by Humana. This book was released on 2017-03-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book illustrates the current state-of-the-art in histamine research, with a focus on the appropriate methodologies to investigate the pharmacological properties and the therapeutic exploitation of HRs and their ligands. In addition, the range of techniques described provides an introduction to complementary cross-methodological disciplines beyond these fields. This multi-disciplinary approach is required to define the ‘decision gates’ that determine the development of more effective and safer therapeutic options for many forms of highly prevalent and debilitating diseases, such as asthma, dementias, dermatitis, and arthritis. Written for the Methods in Pharmacology and Toxicology series, chapters concentrate on practical, hands-on protocols from experts in the techniques. Authoritative and thorough, Histamine Receptors as Drug Targets seeks to aid pharmacologists, biochemists, drug discovery researchers, molecular biologists, chemists, toxicologists, lab scientists, medical doctors, principle investigators, research scientists, lab directors and technicians, as well as graduate students around the world in pursuing the study of this vital scientific area.

Histamine H4 receptor

Download Histamine H4 receptor PDF Online Free

Author :
Publisher : Walter de Gruyter
ISBN 13 : 8376560565
Total Pages : 368 pages
Book Rating : 4.3/5 (765 download)

DOWNLOAD NOW!


Book Synopsis Histamine H4 receptor by : Holger Stark

Download or read book Histamine H4 receptor written by Holger Stark and published by Walter de Gruyter. This book was released on 2013-11-20 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: H4 R is the newest member of the histamine receptor family, which was discovered about twelve years ago. It is considered a very promising drug target. The effort to improve the pharmacokinetic properties of the currently available H4 R ligands is reflected in a steadily growing number of scientific publications and patent applications. Preclinical data strongly confirms the need for novel potent H4 R ligands to explore their therapeutic value in allergy, inflammation, autoimmune disorders, and possibly, cancer. Readers will be provided with extensive knowledge on histamine metabolism, as well as cellular histamine transport, storage and release, effects of histamine and histamine receptor ligands, with particular attention to the H4 R, on inflammatory cells including mast cells, basophils, eosinophils, neutrophils, macrophages, dendritic cells, and T cells. The present knowledge on the regulatory role of histamine and the therapeutic exploitation of histamine receptor ligands in atopic diseases, with emphasis on human and animal models of asthma, allergic dermatitis and pruritus are discussed.

Histamine in the brain

Download Histamine in the brain PDF Online Free

Author :
Publisher : Frontiers Media SA
ISBN 13 : 2889194345
Total Pages : 100 pages
Book Rating : 4.8/5 (891 download)

DOWNLOAD NOW!


Book Synopsis Histamine in the brain by : Jian-Sheng Lin

Download or read book Histamine in the brain written by Jian-Sheng Lin and published by Frontiers Media SA. This book was released on 2015-03-18 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

The Histamine H3 Receptor

Download The Histamine H3 Receptor PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080534007
Total Pages : 304 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis The Histamine H3 Receptor by : R. Leurs

Download or read book The Histamine H3 Receptor written by R. Leurs and published by Elsevier. This book was released on 1998-12-09 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the early eighties when the H3 receptor was identified, many thought that an H3 ligand, an agonist or an antagonist, would become available as a therapeutic agent. This has not occurred. The reason for this could be the fact that many investigators consider histamine mainly, if not only, as a mediator present in for example mast cells being released during allergic events. However, it has become apparent that histamine is an important neurotransmitter. Its role in the nervous system, especially in the central part of it, is rather extensive. The H3 receptor is mainly found as a presynaptic one, both on histaminergic neurons (the auto-type) and on other neuronal systems (the hetero-type). Both the H3 agonist and the H3 antagonist cause important pharmacological effects. Several ligands have become available now, including radiolabelled analogues. In this book, the current state of affairs with regards to the medicinal chemistry and pharmacology of the H3 receptor and the several ligands available are presented by a number of experts in the field. The book presents an extended review of what has happened since the first H3 paper appeared. The editors hope that publication of this work will lead to an increase in interest of both academia and industry for the H3 receptor, especially as a target for drug development.

Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development

Download Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)

DOWNLOAD NOW!


Book Synopsis Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development by : Vanina A. Medina

Download or read book Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development written by Vanina A. Medina and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development.

Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development

Download Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development PDF Online Free

Author :
Publisher :
ISBN 13 : 9789533072579
Total Pages : pages
Book Rating : 4.0/5 (725 download)

DOWNLOAD NOW!


Book Synopsis Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development by : Vanina A. Medina

Download or read book Histamine Receptors as Potential Therapeutic Targets for Cancer Drug Development written by Vanina A. Medina and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Pharmacology of Histamine Receptors

Download Pharmacology of Histamine Receptors PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 1483193411
Total Pages : 540 pages
Book Rating : 4.4/5 (831 download)

DOWNLOAD NOW!


Book Synopsis Pharmacology of Histamine Receptors by : C. R. Ganellin

Download or read book Pharmacology of Histamine Receptors written by C. R. Ganellin and published by Elsevier. This book was released on 2013-10-22 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pharmacology of Histamine Receptors presents a summary of the pharmacology of histamine receptors. It discusses the research and developments made in the use of histamine. It addresses the biological actions of the drug in various pathological instances. Some of the topics covered in the book are the classification of histamine receptors; mepyramine and related histamine antagonists; activity relationships of drugs acting at histamine receptors; chemical structure of histamine; effects of methyl substituents in histamine; enzymes involved in histamine metabolism; and histamine in body fluids. The cellular sources of histamine in tissues and blood are fully covered. The relationship of the mast cell to basophil is discussed in detail. The text describes in depth the urinary excretion of histamine and metabolites. The pathological conditions in man are presented completely. A chapter is devoted to the fundamental properties of adenylate cyclase and its measurement. The book can provide useful information to pharmacists, doctors, chemists, students, and researchers.

The Third Histamine Receptor

Download The Third Histamine Receptor PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1420053922
Total Pages : 408 pages
Book Rating : 4.4/5 (2 download)

DOWNLOAD NOW!


Book Synopsis The Third Histamine Receptor by : Divya Vohora

Download or read book The Third Histamine Receptor written by Divya Vohora and published by CRC Press. This book was released on 2008-11-14 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

G Protein-Coupled Receptors as Drug Targets

Download G Protein-Coupled Receptors as Drug Targets PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527606955
Total Pages : 304 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!


Book Synopsis G Protein-Coupled Receptors as Drug Targets by : Roland Seifert

Download or read book G Protein-Coupled Receptors as Drug Targets written by Roland Seifert and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its particular emphasis on the constitutive activity of G-protein-coupled receptors (GPCRs)s, this book comprehensively discusses an important biological process that has not yet been covered in such depth in any other existing books on GPCRs. The international team of highly distinguished authors addresses in detail current models and concepts, to introduce medicinal chemists, physiologists, pharmacologists, and medical researchers into the advances in the understanding of GPCR activation and constitutive activity. In addition, the book provides an overview on methods of investigating constitutive GPCR activity. The text is well illustrated by selected experimental data and schemes._The chaptes are all cross-referenced with each other and cover general mechnisms, methodological approaches and cover selected important GPCR sysstems, the consequences for drug action, including, side effects, and rational drug design for GPCR targets. A highly recommended reference for researchers in academia and industry. authors addresses in detail current models and concepts, so as to introduce pharmaceutical chemists, physiologists and medical researchers to the advances in the understanding of GPCR activation and constitutive activity, and provides an overview of the methods of investigating GPCR activity. The text is backed by abundant case studies and methodological advice for analyzing GPCRs, covering selected pharmacologically relevant GPCR systems, the consequences for drug action, including unwanted side effects, and rational drug design for GPCR targets. A highly practical reference for researchers in academia and industry.

Hepatotoxicity

Download Hepatotoxicity PDF Online Free

Author :
Publisher : Lippincott Williams & Wilkins
ISBN 13 : 9780781719520
Total Pages : 848 pages
Book Rating : 4.7/5 (195 download)

DOWNLOAD NOW!


Book Synopsis Hepatotoxicity by : Hyman J. Zimmerman

Download or read book Hepatotoxicity written by Hyman J. Zimmerman and published by Lippincott Williams & Wilkins. This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by the foremost authority in the field, this volume is a comprehensive review of the multifaceted phenomenon of hepatotoxicity. Dr. Zimmerman examines the interface between chemicals and the liver; the latest research in experimental hepatotoxicology; the hepatotoxic risks of household, industrial, and environmental chemicals; and the adverse effects of drugs on the liver. This thoroughly revised, updated Second Edition features a greatly expanded section on the wide variety of drugs that can cause liver injury. For quick reference, an appendix lists these medications and their associated hepatic injuries. Also included are in-depth discussions of drug metabolism and factors affecting susceptibility to liver injury.

Cognitive Enhancing Drugs

Download Cognitive Enhancing Drugs PDF Online Free

Author :
Publisher : Birkhäuser
ISBN 13 : 3034878672
Total Pages : 213 pages
Book Rating : 4.0/5 (348 download)

DOWNLOAD NOW!


Book Synopsis Cognitive Enhancing Drugs by : Jerry J. Buccafusco

Download or read book Cognitive Enhancing Drugs written by Jerry J. Buccafusco and published by Birkhäuser. This book was released on 2012-12-06 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade research into the pharmacology of cognition, particularly regarding learning and memory, has supported the concept that many potential neural targets exist for the development of cognitive-enhancing drugs. Whereas the main impetus for this research has been the ever growing population of individuals with dementing disorders such as Alzheimer`s disease, attention is also being focused on issues relating to cognitive impairment associated with "normal" aging. This book is useful as a source of information for making informed decisions regarding the relative utility and attributes of the various neural targets that have been studied to date.

The Functional Roles of Histamine Receptors

Download The Functional Roles of Histamine Receptors PDF Online Free

Author :
Publisher : Springer Nature
ISBN 13 : 3031169972
Total Pages : 463 pages
Book Rating : 4.0/5 (311 download)

DOWNLOAD NOW!


Book Synopsis The Functional Roles of Histamine Receptors by : Kazuhiko Yanai

Download or read book The Functional Roles of Histamine Receptors written by Kazuhiko Yanai and published by Springer Nature. This book was released on 2022-09-28 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Itch

Download Itch PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1466505435
Total Pages : 482 pages
Book Rating : 4.4/5 (665 download)

DOWNLOAD NOW!


Book Synopsis Itch by : E. Carstens

Download or read book Itch written by E. Carstens and published by CRC Press. This book was released on 2014-02-25 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in itch research have elucidated differences between itch and pain but have also blurred the distinction between them. There is a long debate about how somatic sensations including touch, pain, itch, and temperature sensitivity are encoded by the nervous system. Research suggests that each sensory modality is processed along a fixed, direct-line communication system from the skin to the brain. Itch: Mechanisms and Treatment presents a timely update on all aspects of itch research and the clinical treatment of itch that accompanies many dermatological conditions including psoriasis, neuropathic itch, cutaneous t-cells lymphomas, and systemic diseases such as kidney and liver disease and cancer. Composed of contributions from distinguished researchers around the world, the book explores topics such as: Neuropathic itch Peripheral neuronal mechanism of itch The role of PAR-2 in neuroimmune communication and itch Mrgprs as itch receptors The role of interleukin-31 and oncostatin M in itch and neuroimmune communication Spinal coding of itch and pain Spinal microcircuits and the regulation of itch Examining new findings on cellular and molecular mechanisms, the book is a compendium of the most current research on itch, its prevalence in society, and the problems associated with treatment.

Biomedical Aspects of Histamine

Download Biomedical Aspects of Histamine PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 9048193494
Total Pages : 451 pages
Book Rating : 4.0/5 (481 download)

DOWNLOAD NOW!


Book Synopsis Biomedical Aspects of Histamine by : Nancy Khardori

Download or read book Biomedical Aspects of Histamine written by Nancy Khardori and published by Springer Science & Business Media. This book was released on 2010-09-30 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Pharmacoepigenetics

Download Pharmacoepigenetics PDF Online Free

Author :
Publisher : Academic Press
ISBN 13 : 0128139404
Total Pages : 983 pages
Book Rating : 4.1/5 (281 download)

DOWNLOAD NOW!


Book Synopsis Pharmacoepigenetics by :

Download or read book Pharmacoepigenetics written by and published by Academic Press. This book was released on 2019-06-04 with total page 983 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pharmacoepigenetics, Volume Eleven provides a comprehensive volume on the role of epigenetics and epigenomics in drug discovery and development, providing a detailed, but accessible, view of the field, from basic principles, to applications in disease therapeutics. Leading international researchers from across academia, clinical settings and the pharmaceutical industry discuss the influence of epigenetics and epigenomics in human pathology, epigenetic biomarkers for disease prediction, diagnosis, and treatment, current epigenetic drugs, and the application of epigenetic procedures in drug development. Throughout the book, chapter authors offer a balanced and objective discussion of the future of pharmacoepigenetics and its crucial contribution to the growth of precision and personalized medicine. Fully examines the influence of epigenetics and epigenomics in human pathology, epigenetic biomarkers for disease prediction, diagnosis, treatment, current epigenetic drugs and the application of epigenetic procedures in drug development Features chapter contributions from leading international researchers in academia, clinical settings and the pharmaceutical industry Instructs researchers, students and clinicians on how to better interpret and employ pharmacoepigenetics in drug development, efficiency and safety Provides a balanced and objective discussion of the future of pharmacoepigenetics and its crucial role in precision medicine

Receptor - Based Drug Design

Download Receptor - Based Drug Design PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 9781420001136
Total Pages : 816 pages
Book Rating : 4.0/5 (11 download)

DOWNLOAD NOW!


Book Synopsis Receptor - Based Drug Design by : Paul Leff

Download or read book Receptor - Based Drug Design written by Paul Leff and published by CRC Press. This book was released on 1998-04-10 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Employing a wide range of examples from G-protein-coupled receptors and ligand-gated ion channels, this detailed, single-source reference illustrates the principles of pharmacological analysis and receptor classification that are the basis of rational drug design. Explains the experimental and theoretical methods used to characterize interactions between ligands and receptors-providing the pharmacological information needed to solve treatment problems and facilitate the drug design process! Demonstrating the achievements of the receptor-based approach in therapeutics and indicating future directions, Receptor-Based Drug Design introduces novel computer-assisted strategies for the design of new agonists, antagonists, and inverse agonists for G-protein-coupled receptors shows how to assess agonist concentration-effect curve data discusses radioligand binding assays presents new in vitro multiarray assays for G-protein-coupled receptors explains the use of individual second messenger signaling responses in analyzing drug-receptor interactions examines the role of electrophysiology in finding new drugs and drug targets describes selectively acting b-adrenoceptor agonists and glucocorticoid steroids for asthma treatment outlines the rationale for using angiotensin receptor antagonists and more! Written by over 25 international authorities and containing nearly 1200 bibliographic citations, Receptor-Based Drug Design is a practical resource for pharmacologists, pharmacists, and pharmaceutical scientists; organic and medicinal chemists and biochemists; molecular biologists; biomedical researchers; and upper-level undergraduate and graduate students in these disciplines.

Histamine and Histamine Antagonists

Download Histamine and Histamine Antagonists PDF Online Free

Author :
Publisher : Springer
ISBN 13 : 9783642758423
Total Pages : 763 pages
Book Rating : 4.7/5 (584 download)

DOWNLOAD NOW!


Book Synopsis Histamine and Histamine Antagonists by : Börje Uvnäs

Download or read book Histamine and Histamine Antagonists written by Börje Uvnäs and published by Springer. This book was released on 2011-12-03 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: Together with the two previous volumes of the Handbook of Experimental Pharmacology on histamine and antihistamines the present publication yields a picture of a still rapidly developing field of research. New techniques and new experimental approaches have brought us new knowledge and deeper insight into the biomedical significance of histamine, even if many questions remain to be answered about the functional and medical implications of this old biogenic amine. The present volume covers the progress in histamine research during the past two decades. A significant chapter concerns techniques for histamine determination. As the result of a consensus meeting in Munich in December 1988, a panel of eminent specialists arrived at common recommendations as to the usefulness of the available histamine assays for the most common experimental biomedical conditions. The heterogeneity of mast cells, with great differences in their reactivity to various stimuli, has become apparent, not only among species but also among the tissues of a species. New informa tion is presented about the mechanism of exocytosis. The old questions about the role of histamine in the mechanism of gastric secretion and in cardio vascular and respiratory functions have been studied with new techniques, and the role of HI and H2 receptors discussed. New observations have been made on the occurrence and possible functions of histaminergic neurons and histamine receptors in CNS where a new type of receptor, the H , seems to 3 be widely represented.