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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 series of reactions require the concerted and precise interaction of a number of enzymes and plasma membrane transporters, and this volume provides in-depth descriptions of these processes. Obviously such a series of complicated reactions may well be prone to malfunction and therefore neurological diseases are likely to be associated with such malfunction of the enzymes and transporters involved in the cycle. These aspects are also discussed in several chapters of the book.A number of leading experts in neuroscience including intermediary metabolism, enzymology and transporter physiology have contributed to this book which provides comprehensive discussions of these different aspects of the functional importance of the glutamate-glutamine cycle coupling homeostasis of glutamatergic, excitatory neurotransmission to basic aspects of brain energy metabolism. This book will be of particular importance for students as well as professionals interested in these fundamental processes involved in brain function and dysfunction.

Stellate Cells in Health and Disease is a comprehensive reference providing the most up-to-date knowledge and perspectives on the function of stellate cells affecting the liver and other organs. The text presents comprehensive coverage of their already established role in hepatic fibrosis along with the newer emerging evidence for stellate cell participation in the liver cell (hepatocyte) survival and regeneration, hepatic immunobiology, transplant tolerance, and liver cancer. Chapters describe both animal and human research and the relevance of findings from animal research to human pathophysiology, and also contain sections on future directions which will be of special interest to basic and clinical researchers working on liver fibrosis, hepatic biology, and pathobiology. - Presents coverage of the mechanisms of liver fibrosis with stellate cells as a target for therapy. - Shows stellate cells as a major participant in hepatic immunobiology, including transplantation immunology. - Key illustrations show the phenotypical changes in stellate cells in situ and tissue culture, their interactions with other cell types, signaling pathways and demonstrate the functions and roles of stellate cell in pathological processes.

Encephalopathy and Nitrogen Metabolism in Liver Failure contains research reports and state-of-the-art reviews that were presented at the 11th International Symposium on Hepatic Encephalopathy and Nitrogen Metabolism in relation to liver disease, that was held in Amsterdam, The Netherlands from 30 May to 1 June, 2002. Themes covered include the metabolism of ammonia and amino acids in relation to liver disease, the assessment of hepatic encephalopathy (HE), minimal HE, animal models of HE, neuropsychiatric dysfunction in patients with chronic liver disease, the pathogenesis of HE, the astrocyte in liver disease, acute liver failure and cerebral edema, treatment of HE and artificial liver support systems. This volume provides an indispensable source of important new research findings and ideas for clinicians and biomedical scientists working in the field of HE and nitrogen metabolism in relation to liver disease.

The book summarises the current understanding of the Nervous -, Endocrine and Immune systems with emphasis on shared mediators and receptors and functional interaction. In addition to the fundamental physiological and pathophysiological mechanisms, which are presented in detail, some clinically relevant subjects are also presented, such as inflammation, asthma and allergy, autoimmune disease, immunodeficiency and the acute phase response. • A comprehensive presentation of neuroimmune biology• Introduces the subject matter to the uninformed reader• Contains basic information, theoretical considerations and up-to-date clinical chapters• The clinical chapters will be helpful to practising physicians