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Molecular Determinants Of Melanopsin Signaling And Deactivation
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Book Synopsis Molecular Determinants of Melanopsin Signaling and Deactivation by : Evan G. Cameron
Download or read book Molecular Determinants of Melanopsin Signaling and Deactivation written by Evan G. Cameron and published by . This book was released on 2014 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique visual pigment melanopsin is expressed in a small subset of intrinsically photosensitive retinal ganglion cells (ipRGCs) within the mammalian retina. The axons of ipRGCs primarily project to brain nuclei that regulate non-image forming visual functions including circadian photoentrainment, pupillary light reflex, and sleep. Unlike rods and cones which hyperpolarize in response to light, ipRGCs depolarize likely through the activation of a Gq-mediated phototransduction cascade. IpRGCs exhibit very poor temporal resolution with sluggish on/off kinetics and a high threshold of activation. Despite this, ipRGCs respond robustly to prolonged illumination and are capable of firing sustained action potentials beyond the lifetime of the stimulus. These response characteristics raise questions about how melanopsin signaling is regulated within the retina. Typically, visual pigment signaling is deactivated by receptor phosphorylation and arrestin binding which act to attenuate and inhibit G-protein binding, respectively. In this work, I investigate the role of arrestin in melanopsin signaling and identify a region within the C-terminal tail of melanopsin that is required for proper activation and deactivation. Using a combination of in vitro and in vivo approaches, I provide evidence for a light- and phosphorylation-dependent deactivation of melanopsin by Beta-arrestin. This work is the first description of a visual pigment deactivation mechanism mediated by Beta-arrestin and is consistent with canonical deactivation mechanism described for other non-visual G-protein coupled receptors (GPCRs). Additionally, I demonstrate that removal or mutation of a region within the proximal portion of melanopsin's C-tail delays the activation and deactivation of the photoresponse. I also show that this region is conserved within the melanopsin family implying important functional significance. Based on these results, I hypothesize that a 9th helix in the C-tail of melanopsin serves two purposes; 1) to stabilize ICL3 and form a portion of the G-protein binding domain and 2) to tether the C-tail close to the membrane surface, facilitating receptor phosphorylation and arrestin binding.
Download or read book Webvision written by Helga Kolb and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Basic Electrophysiological Methods by : Ellen Covey
Download or read book Basic Electrophysiological Methods written by Ellen Covey and published by Oxford University Press. This book was released on 2015-02-25 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic Electrophysiological Methods provides a concise and easy-to-read guide on a selection of the most important contemporary electrophysiological techniques, their implementation, applications, and ways in which they can be combined and integrated with neuroscientific techniques. Intended for students, postdocs, and faculty with a basic neuroscience background, this text will not obscure the relevant technical details with textbook neuroscience tutorials as many other books do. Instead, each chapter provides a conscientious overview of the underlying theory -- a comprehensive description of equipment, materials, methods, data management, and analysis -- a troubleshooting guide, and a list of frequently asked questions. No book or online resource can function as strictly a DIY set of instructions on how to implement a complex technique. However, this book provides a fundamental and accessible set of information intended to form a foundation prior to, during, and after hands-on experience and training, greatly facilitating the initial learning process and subsequent fine-tuning of technical details.
Book Synopsis The Neurobiology of Circadian Timing by :
Download or read book The Neurobiology of Circadian Timing written by and published by Elsevier. This book was released on 2012-12-06 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leading authors review the state-of-the-art in their field of investigation, and provide their views and perspectives for future researchChapters are extensively referenced to provide readers with a comprehensive list of resources on the topics coveredAll chapters include comprehensive background information and are written in a clear form that is also accessible to the non-specialist - Leading authors review the state-of-the-art in their field of investigation, and provide their views and perspectives for future research - Chapters are extensively referenced to provide readers with a comprehensive list of resources on the topics covered - All chapters include comprehensive background information and are written in a clear form that is also accessible to the non-specialist
Book Synopsis Applications of Dynamical Systems in Biology and Medicine by : Trachette Jackson
Download or read book Applications of Dynamical Systems in Biology and Medicine written by Trachette Jackson and published by Springer. This book was released on 2015-07-06 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights problems from a range of biological and medical applications that can be interpreted as questions about system behavior or control. Topics include drug resistance in cancer and malaria, biological fluid dynamics, auto-regulation in the kidney, anti-coagulation therapy, evolutionary diversification and photo-transduction. Mathematical techniques used to describe and investigate these biological and medical problems include ordinary, partial and stochastic differentiation equations, hybrid discrete-continuous approaches, as well as 2 and 3D numerical simulation.
Book Synopsis Signal Transduction in the Retina by : Steven J. Fliesler
Download or read book Signal Transduction in the Retina written by Steven J. Fliesler and published by CRC Press. This book was released on 2007-12-26 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the twenty-first century, we are just beginning to understand more clearly the enormous diversity and complexity of signaling processes in the retina. Integrating advances in the biochemistry, cell biology, physiology, and physics of phototransduction, Signal Transduction in the Retina presents the methodologies and experimental approache
Book Synopsis Pediatric Neuro-Ophthalmology by : Michael C. Brodsky
Download or read book Pediatric Neuro-Ophthalmology written by Michael C. Brodsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pediatric Neuroophthalmology details the diagnostic criteria, current concepts of pathogenesis, neuroradiological correlates, and clinical management of a large group of neuroophthalmic disorders that present in childhood. Surprisingly distinct from neuroophthalmic disorders afflicting adults, this set of diseases falls between the cracks of most ophthalmology training, and thus, warrants a practical, clinical guide for the practitioner in ophthalmology - the neuroophthalmologist, pediatric ophthalmologist, general ophthalmologist - as well as neurologists and for residents. The authors, leading pediatric ophthalmologists, have taken this difficult subject matter and developed an accessible, user-friendly manual with a detailed approach to the recognition, differential diagnosis, and management of pediatric neuroophthalmologic disorders.
Download or read book The Pineal Gland written by I. Nir and published by . This book was released on 2015-01-07 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anatomy ;Ocular physiology ;Biochemistry and genetics ;Pathology ;Microbiology ;Immunology ;Growth and senescence ;Optics ;Therapeutics ;Lasers and instrument technology ;Basic biostatistical and epidemiological terms by : Louise Bye
Download or read book Anatomy ;Ocular physiology ;Biochemistry and genetics ;Pathology ;Microbiology ;Immunology ;Growth and senescence ;Optics ;Therapeutics ;Lasers and instrument technology ;Basic biostatistical and epidemiological terms written by Louise Bye and published by OUP Oxford. This book was released on 2013-05-23 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: An indispensable and fully comprehensive textbook, this covers the basic sciences in ophthalmology and is the only book you need to pass the FRCOphth Part 1 exam.
Book Synopsis Foundations of Psychiatric Sleep Medicine by : John W. Winkelman
Download or read book Foundations of Psychiatric Sleep Medicine written by John W. Winkelman and published by Cambridge University Press. This book was released on 2010-12-23 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sleep-related complaints are extremely common across the spectrum of psychiatric illness. Accurate diagnosis and management of sleep disturbances requires an understanding of the neurobiological mechanisms underlying sleep and wakefulness, the characteristics of sleep disturbance inherent to psychiatric illness and primary sleep disorders, as well as the psychopharmacologic and behavioral treatments available. Foundations of Psychiatric Sleep Medicine provides a uniquely accessible, practical, and expert summary of current clinical concepts at the sleep-psychiatry interface. Topics covered include: basic principles in sleep science, clinical sleep history taking, primary sleep disorders in psychiatric contexts, and sleep disturbance across a range of mood, anxiety, psychotic, substance use, cognitive and developmental disorders. Written by outstanding experts in the field of sleep medicine and psychiatry, this academically rigorous and clinically useful text is an essential resource for psychiatrists, psychologists and other health professionals interested in the relationship between sleep and mental illness.
Book Synopsis Pediatric Retina by : James D. Reynolds
Download or read book Pediatric Retina written by James D. Reynolds and published by Springer Science & Business Media. This book was released on 2010-09-14 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pediatric retinal diseases are not simply retinal diseases that occur in children; rather, they are unique disorders that often are not found in adults. This textbook of the pediatric retina offers in-depth guidance on congenital and acquired diseases of the retina in the pediatric population. It is organized according to disease onset and timing, as well as anatomy. All chapters are written by leading authorities in the field from both the pediatric and the retinal perspective. A multidisciplinary approach to the topic is adopted, and critical information is included on disease classification and diagnosis, pathophysiology, genetics, complications, and prognosis. Pediatric Retina will be a useful source of information for pediatric ophthalmologists, retina specialists, and other eye care providers who care for children.
Book Synopsis Rhythms of the Brain by : Gyorgy Buzsaki
Download or read book Rhythms of the Brain written by Gyorgy Buzsaki and published by Oxford University Press. This book was released on 2006-08-03 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides eloquent support for the idea that spontaneous neuron activity, far from being mere noise, is actually the source of our cognitive abilities. In a sequence of "cycles," György Buzsáki guides the reader from the physics of oscillations through neuronal assembly organization to complex cognitive processing and memory storage. His clear, fluid writing-accessible to any reader with some scientific knowledge-is supplemented by extensive footnotes and references that make it just as gratifying and instructive a read for the specialist. The coherent view of a single author who has been at the forefront of research in this exciting field, this volume is essential reading for anyone interested in our rapidly evolving understanding of the brain.
Book Synopsis Mammalian Transient Receptor Potential (TRP) Cation Channels by : Bernd Nilius
Download or read book Mammalian Transient Receptor Potential (TRP) Cation Channels written by Bernd Nilius and published by Springer. This book was released on 2014-06-24 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this fast moving field the main goal of this volume is to provide up-to-date information on the molecular and functional properties and pharmacology of mammalian TRP channels. Leading experts in the field describe properties of a single TRP protein/channel or portray more general principles of TRP function and important pathological situations linked to mutations of TRP genes or their altered expression. Thereby this volume on Transient Receptor Potential (TRP) Channels provides valuable information for readers with different expectations and backgrounds, for those who are approaching this field of research as well as for those wanting to make a trip to TRPs.
Book Synopsis Diversity in the Neuronal Machine by : Ivan Soltesz
Download or read book Diversity in the Neuronal Machine written by Ivan Soltesz and published by Oxford University Press. This book was released on 2006 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aims to provide insights into the striking degree of cellular diversity found in the interneuronal microcircuits in the brain's neocortex and hippocampus. This book elaborates on different ideas about interneuronal diversity that rest upon theoretical and experimental results and is useful for neuroscientists.
Book Synopsis Marine Mammal Sensory Systems by : Ronald A. Kastelein
Download or read book Marine Mammal Sensory Systems written by Ronald A. Kastelein and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of original research papers given at a symposium entitled "Sensory Systems and Behavior of Aquatic Mammals", hosted by the USSR Academy of Sciences. The meeting was held in Moscow from 16 to 25 October, 1991 and involved nearly 100 scientists from around the world. The major headings of the book correspond to the session topics at the symposium. This meeting was not the first dedicated to problems of sensory systems in aquatic mammals. Experts in this field met several times previously to discuss important problems of sensory functions in echolocating animals. symposia on biosonar systems were held in Frascati, Italy in 1966, then in Jersey, France in 1978, and in Helsingor, Denmark in 1986. Papers presented at these meetings were pUblished in books that advanced significantly the understanding of sensory systems (Busnel and Fish, 1980; Nachtigall and Moore, 1988). Initially, echolocating bats were the main subjects of consideration. However, studies on echolocating aquatic mammals, whales and dolphins, increased from one meeting to the next. Indeed, aquatic mammals are of exceptional interest for studying the adaptation of sensory functions for echolocation in specific aquatic environments. As a natural consequence of these developments, the 1989 symposium in Rome was devoted specifically to the sensory systems of cetaceans (Thomas and Kastelein, 1990). This symposium was held within the Fifth International Theriological Congress and was attended by many scientists.
Book Synopsis Sleep and Mental Illness by : S. R. Pandi-Perumal
Download or read book Sleep and Mental Illness written by S. R. Pandi-Perumal and published by Cambridge University Press. This book was released on 2010-04-01 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diagnosis of mental illness is frequently accompanied by sleep problems; conversely, people experiencing sleep problems may subsequently develop mental illness. Sleep and Mental Illness looks at this close correlation and considers the implications of research findings that have emerged in the last few years. Additionally, it surveys the essential concepts and practical tools required to deal with sleep and co-morbid psychiatric problems. The volume is divided into three main sections: basic science, neuroendocrinology, and clinical science. Included are over 30 chapters on topics such as neuropharmacology, insomnia, depression, dementia, autism, and schizophrenia. Relevant questionnaires for the assessment of sleep disorders, including quality-of-life measurement tools, are provided. There is also a summary table of drugs for treating sleep disorders. This interdisciplinary text will be of interest to clinicians working in psychiatry, behavioral sleep medicine, neurology, pulmonary and critical care medicine.
Book Synopsis Development, structure and function of vertebrate retinas: A virtual festschrift for Prof. Steve Massey by : David W. Marshak
Download or read book Development, structure and function of vertebrate retinas: A virtual festschrift for Prof. Steve Massey written by David W. Marshak and published by Frontiers Media SA. This book was released on 2024-09-19 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a remarkable time to study the vertebrate retina, either as a model for the brain or to understand the first steps in vison. We have known about the diversity of retinal neurons and glia for more than one hundred years, and we are now extending these findings and making new discoveries about retinal cell types by analyzing gene expression in single cells. We have made significant progress toward our ultimate goals of describing the neural circuits in the retinas at the level of connections between identified populations of neurons and understanding neuronal and glial cell function at the molecular level. We have also made great strides toward understanding retinal development and the etiology of retinal diseases. Physiologists are now using more realistic stimuli and modern analytical methods to analyze the mechanisms underlying light responses of retinal neurons, and this has led to more accurate computational models of neural circuits in the retina. My colleague at the McGovern Medical School in Houston, Steve Massey, has made many important contributions to this field, both as a researcher and as a mentor, and he is planning his retirement. Judith Ogilvie, Christophe Ribelayga, Chai-an Mao and I will dedicate this issue to him and plan to publish some of his latest work. This Research Topic will include mini-reviews and brief communications about neurons and neural circuits in vertebrate retinas. The scope will be very broad, including anatomical, physiological, psychophysical and computational approaches to this topic. Potential topics include, but are not restricted to: • Development. morphology and synaptic connections of neuronal types • Light responses, spontaneous activity and membrane properties of retinal neurons • Gene expression and other aspects of cell biology of identified retinal neurons • Release of neurotransmitters and modulators and their effects in the retina • Structure and function of electrical synapses in the retina • Neural circuits that mediate responses to color, contrast and movement • Roles of neuroglia in retinal development, homeostasis and light responses • Contributions of neural circuits in the retina to visual perception • Evolution of neuronal types and neural circuits in the retina • Novel techniques for analyzing retinal neurons and neural circuits • Non-invasive methods to analyze retinal structure and function • Etiology of retinal diseases and potential new therapies • Directions for future research on the vertebrate retina
