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Brain Slices in Basic and Clinical Research describes advancements in the field of brain function and dysfunction through use of central nervous system slice preparations. Topics are authored by leading scientists and include the following: Mechanisms of synaptic plasticity as the basis of memory processes Chaos and synaptic variability Brain calcium currents Glutamate receptors Pathophysiology of excitotoxins Cerebral hypoxia-ischemia Neuronal injury Free radicals Optical methods of measuring brain metabolism Voltammetry in brain slices Calcium imaging Patch-clamp recording and application of macromolecules through patch-clamp pipettes in brain slices Intracellular double labeling of various neuronal populations Use of brain slices in teaching neurophysiological methods Most of the topics are published in book format for the first time, and some of the techniques are more fully detailed than in any other book.
In little less than a decade brain slices have gained prominence among neurobiologists as appropriate tools to study cellular electrophysiolog ical aspects of mammalian brain function. The purpose of this volume is to present in some detail several inquiries in the brain sciences that have benefited greatly by the use of brain slices. The book is directed primarily toward advanced students and researchers wishing to evaluate the impact these in vitro preparations of the mammalian brain are having on neurobiology. The term brain slice has come to refer to thin (100-700 j. Lm) sections of a brain region prepared from adult mammals and maintained for many hours in vitro, for either electrophysiological or biochemical stud ies. In addition to good accessibility, slices feature relatively intact syn aptic connections that allow a variety of experiments not feasible with standard in vivo or tissue culture preparations. Certain electrophysiol ogical studies once practical only with invertebrate models are becoming routine with mammalian brain slices. The ability to perform both bio chemical and electro physiological experiments on the same piece of CNS tissue provides additional bright prospects for future research. Although most of the electrophysiological studies have dealt with hippocampal slices, it should be evident from this book that slice methodology is not limited to the hippocampus. The Appendix, "Brain Slice Methods," is a multiauthored treatment of the technical aspects of brain slice work, collected into one document.
Abstract: Background The study of the distinct structure and function of the human central nervous system, both in healthy and diseased states, is becoming increasingly significant in the field of neuroscience. Typically, cortical and subcortical tissue is discarded during surgeries for tumors and epilepsy. Yet, there is a strong encouragement to utilize this tissue for clinical and basic research in humans. Here, we describe the technical aspects of the microdissection and immediate handling of viable human cortical access tissue for basic and clinical research, highlighting the measures needed to be taken in the operating room to ensure standardized procedures and optimal experimental results. Methods In multiple rounds of experiments (n = 36), we developed and refined surgical principles for the removal of cortical access tissue. The specimens were immediately immersed in cold carbogenated N-methyl-D-glucamine-based artificial cerebrospinal fluid for electrophysiology and electron microscopy experiments or specialized hibernation medium for organotypic slice cultures. Results The surgical principles of brain tissue microdissection were (1) rapid preparation (1 min), (2) maintenance of the cortical axis, (3) minimization of mechanical trauma to sample, (4) use of pointed scalpel blade, (5) avoidance of cauterization and blunt preparation, (6) constant irrigation, and (7) retrieval of the sample without the use of forceps or suction. After a single round of introduction to these principles, multiple surgeons adopted the technique for samples with a minimal dimension of 5 mm spanning all cortical layers and subcortical white matter. Small samples (5-7 mm) were ideal for acute slice preparation and electrophysiology. No adverse events from sample resection were observed.brbrConclusion
As imaging studies have continued to expand in scope and sophistication, this new edition of the highly successful and well–received Imaging Neurons: A Laboratory Manualhas expanded to include development, with over twenty new chapters on such topics as MRI microscopy, imaging early developmental events, and labeling single neurons. Chapters on FRET, FCS/ICS, FRAP, hyperresolution microscopy, single molecule imaging, imaging with quantum dots, and imaging gene expression are included. With over forty full chapters, the manual also includes over forty sections of protocols for imaging techniques.
This book provides insights into how to be a productive clinical researcher via real-life case examples of successful clinical research -- and also clinical research gone awry. Through these examples of success and failure, the book develops a blueprint for building a career in clinical research. Future medical practice depends on the quality of the clinical trials to which drugs, devices, and treatment procedures are subjected today. However, clinical trials are not easy to do, and many physicians and health care providers who attempt clinical research struggle in this endeavor, primarily because of lack of instruction. Clinical Research aims to fill the gap between training and research through case studies of a long-time clinical researcher’s rich and varied experiences.
The brain is an extremely energy consuming part of the body, which makes it dangerously vulnerable to metabolic stress. It’s no wonder then that abnormalities of brain energy metabolism are becoming the usual suspects and a hallmark of many neurodegenerative diseases. The socioeconomic burden of these alone begs for urgent measures to be taken for better understanding both fundamental and applied problems of neuroenergetics and neuroprotection. For instance, brain imaging reveals that the diseased brains of Alzheimer’s patients cannot efficiently utilize the vital brain fuel, glucose. The resulting energy deficit causes neuronal hyperactivity, seizures and cognitive impairments. Administration of native energy substrates complementary to glucose is a logical (and attractive in its simplicity) approach in fighting the energy crisis in the brain*. The two closely related aspects of brain activity -- neuronal and metabolic – are currently considered to be of utmost importance in both fundamental and applied neuroscience. Although recently the studies of both brain activity and metabolism in normal conditions, under metabolic stress, and in neurodegenerative diseases have experienced significant progress, their overlapping areas deserve further clarification by joint efforts from experts in such fields as (1) energy demands, supplies, and efficiency at the cellular level: in neurons, glial elements, micro-vessels and in the process of their coordinated interactions; (2) specific roles of energy substrates in fine-tuning of the demand-supply mechanism in the condition of metabolic stress; and (3) the macro-level of energy homeostasis and dietary manipulations possible beneficial for neurodegenerative diseases. The result of combining into a coherent whole the recent findings in these fields will hopefully bring forward a broader view and better understanding of the knowledge continuum, which is under the threat of further fragmentation due to the unavoidable process of specialization in neuroscience. Current issue covers the three major groups of topics: 1. The Pros and Cons of studies of neuronal activity using brain slice preparations 2. The role of particular energy substrates in metabolic support of neuronal activity 3. The macro-level of energy homeostasis and the dietary manipulations that seem promising in prevention and correction of the diseases of brain energy metabolism.