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Fundamental biochemical studies of basic brain metabolism focusing on the neuroactive amino acids glutamate and GABA combined with the seminal observation that one of the key enzymes, glutamine synthetase is localized in astroglial cells but not in neurons resulted in the formulation of the term “The Glutamate-Glutamine Cycle.” In this cycle glutamate released from neurons is taken up by surrounding astrocytes, amidated by the action of glutamine synthetase to glutamine which can be transferred back to the neurons. The conversion of glutamate to glutamine is like a stealth technology, hiding the glutamate molecule which would be highly toxic to neurons due to its excitotoxic action. This...
The Advances in Neurochemistry series was initiated for a readership of neuroscientists with a background in biochemistry. True to this concept, the present volume brings together various applications of magnetic resonance technology to advance our knowledge of how the nervous system functions. Whether at the cellular, tissue slice, or intact organism level. magnetic resonance techniques are by their nature noninvasive, and thus provide a window through which biochemical reactions can be viewed without grinding, binding, or other wise perturbing ongoing physiological processes. As technological improve ments in methodology, such as higher and more uniform magnetic fields, novel paradigms for...
From the preface: “Neural Metabolism In Vivo aims to provide a comprehensive overview of neurobiology by presenting the basic principles of up-to-date and cutting-edge technology, as well as their application in assessing the functional, morphological and metabolic aspects of the brain. Investigation of neural activity of the living brain via neurovascular coupling using multimodal imaging techniques extended our understanding of fundamental neurophysiological mechanisms, regulation of cerebral blood flow in connection to neural activity and the interplay between neurons, astrocytes and blood vessels. Constant delivery of glucose and oxygen for energy metabolism is vital for brain function...
Endocrinological research early recognized the importance of intercellular interactions and realized the importance of glutamatergic and GABAergic signaling. In turn this signalling depends on elaborate interactions between astrocytes and neurons, without which neurons would be unable to produce, reuse and metabolize transmitter glutamate and GABA. Details of these subjects are described in this Research Topic by key investigators in this field. It focuses on the intricate and extremely swift pathway producing these amino acid transmitters from glucose in brain but also discusses difficulties in determining expression of some of the necessary genes in astrocytes and related processes in pancreatic islets. However, it does not discuss how closely associated astrocytes and neurons are anatomically, enabling these interactions. This is elegantly shown in this cover image, kindly provided by Professor Andreas Reichenbach (University of Leipzig, Germany).
Proceedings of the Conference on Recent Advances in Neurobiology: Plasticity and Regeneration held in St. Vincent, Italy, October 9-11 1995
Annotation The brain, and the rest of the nervous system, consists of nerve cells (neurons) and non-neuronal cells (glial cells), which by far outnumber the neurons, but in the past have received much less attention. This began to change about 30 years ago with the realization that glial cells carry out very important functions, generally in collaboration with the nerve cells. Evidence is now starting to accumulate that glial cells, especially astrocytes and microglia, may be major (in some cases the main) players in a multitude of neurological and mental diseases, and that different types of glial cells interact not only with nerve cells but also with each other and with cells lining brain ...
Includes bibliographical references and index.
This book covers the use of nanomedicine in the delivery of neuroprotective agents, including pharmacological drugs, stem cells, neurotrophic factors, monoclonal antibodies and enzymes to induce greater beneficial effects in neurologic diseases. Thus, the main purpose of the book is to explore the delivery of drugs either alone or in combination with stem cells to enhance neuroprotection in neurological diseases. Brain pathology associated with acute trauma such as head injury and brain blast injury can also be managed using novel treatment strategies. In addition, emphasis is made that standard patterns of brain pathology may be complicated with multiple comorbidity factors where one agent ...
Presenting the latest research in glial cell function gleaned from new techniques in imaging and molecular biology, The Role of Glia in Neurotoxicity, Second Edition covers multiple aspects of glial cells, including morphology, physiology, pharmacology, biochemistry, pathology, and their involvement in the pathophysiology of neurological diseases.