Regulatory Mechanisms of Intracellular Membrane Transport


Book Description

This book deals with the molecular mechanisms of membrane trafficking, a central eukaryotic cell biological process. In the post-genomic era many essential molecules involved in intracellular membrane/protein transport are emerging. A huge task now is to compile the molecular networks that govern these processes. Understanding of regulatory processes and participating molecules are likely to reveal global cellular regulatory circuits that couple membrane trafficking with other cellular functions. Such cell biological features are only starting to emerge. This book puts special emphasis on such mechanisms and processes. The contents discusses the role of coat proteins, tethering complexes, small rab GTPases, Sec1-family proteins and SNARE molecule phosphorylation in exocytosis, endocytosis and membrane fusion. In addition, the role of lipids in vesicle formation and membrane fusion, and some specialized cell biological denovo membrane generation processes are discussed.




Regulatory Mechanisms of Intracellular Membrane Transport


Book Description

This book deals with the molecular mechanisms of membrane trafficking, a central eukaryotic cell biological process. In the post-genomic era many essential molecules involved in intracellular membrane/protein transport are emerging. A huge task now is to compile the molecular networks that govern these processes. Understanding of regulatory processes and participating molecules are likely to reveal global cellular regulatory circuits that couple membrane trafficking with other cellular functions. Such cell biological features are only starting to emerge. This book puts special emphasis on such mechanisms and processes. The contents discusses the role of coat proteins, tethering complexes, small rab GTPases, Sec1-family proteins and SNARE molecule phosphorylation in exocytosis, endocytosis and membrane fusion. In addition, the role of lipids in vesicle formation and membrane fusion, and some specialized cell biological denovo membrane generation processes are discussed.




Trafficking Inside Cells


Book Description

This book covers the past, present and future of the intra-cellular trafficking field, which has made a quantum leap in the last few decades. It details how the field has developed and evolved as well as examines future directions.







Magnesium in the Central Nervous System


Book Description

The brain is the most complex organ in our body. Indeed, it is perhaps the most complex structure we have ever encountered in nature. Both structurally and functionally, there are many peculiarities that differentiate the brain from all other organs. The brain is our connection to the world around us and by governing nervous system and higher function, any disturbance induces severe neurological and psychiatric disorders that can have a devastating effect on quality of life. Our understanding of the physiology and biochemistry of the brain has improved dramatically in the last two decades. In particular, the critical role of cations, including magnesium, has become evident, even if incompletely understood at a mechanistic level. The exact role and regulation of magnesium, in particular, remains elusive, largely because intracellular levels are so difficult to routinely quantify. Nonetheless, the importance of magnesium to normal central nervous system activity is self-evident given the complicated homeostatic mechanisms that maintain the concentration of this cation within strict limits essential for normal physiology and metabolism. There is also considerable accumulating evidence to suggest alterations to some brain functions in both normal and pathological conditions may be linked to alterations in local magnesium concentration. This book, containing chapters written by some of the foremost experts in the field of magnesium research, brings together the latest in experimental and clinical magnesium research as it relates to the central nervous system. It offers a complete and updated view of magnesiums involvement in central nervous system function and in so doing, brings together two main pillars of contemporary neuroscience research, namely providing an explanation for the molecular mechanisms involved in brain function, and emphasizing the connections between the molecular changes and behavior. It is the untiring efforts of those magnesium researchers who have dedicated their lives to unraveling the mysteries of magnesiums role in biological systems that has inspired the collation of this volume of work.




Regulation and Development of Membrane Transport Processes


Book Description

This state-of-the-art assessment describes the means by which cell membrane transport systems are regulated in both epithelial and nonepithelial cells. Regulation and Development of Membrane Transport Processes leads readers from a physiological description of regulation toward a more mechanistic level of understanding. Distinguished researchers in physiology, biochemistry, genetics, and pharmacology offer key insights into the regulatory processes evoked by external stimuli, such as hormones or substrate limitation, and by the internal stimulus of genetically programmed development. Their multidisciplinary efforts define three forms of regulations: (1) gene expression leading to de novo synthesis; (2) insertion and removal of cytoplasmic membrane vesicles; and (3) in situ modification of the transport system in the membrane. Regulation and Development of Membrane Transport Processes reviews a wide spectrum of transport regulatory phenomena in eukaryotic cells and provides the groundwork for future research.




Membrane Transporters and Channels as Targets for Drugs


Book Description

Transporters and channels are membrane proteins that mediate the traffic of metabolites, water and ions across biological membranes. Membrane transport proteins are crucial to maintain homeostasis and assure cell survival upon intracellular or environmental stress. A failure of any of these transport systems may have dramatic consequences for cell function. There is increasing evidence that membrane transport proteins play important functions in healthy conditions and that their absence or dysfunction may cause diseases. In recent years much attention has been paid to diseases resulting from defective transporters (“carrier diseases”) and ion channels (“channelopathies”). Very interestingly, altered expression of transporters has been described in several human pathologies. On this basis, many transport proteins are well acknowledged targets for drugs. Many others are involved in drug delivery and disposition and/or are considered potential targets. Others are off-targets for drugs and then, are responsible for side effects. Thus, membrane protein drug discovery is now an emerging field where the search for physiological mechanisms of regulation and for chemical compounds as modulators of transport activity, present new opportunities for drug development and for new therapies. This Research Topic addresses the latest research advances in membrane transport proteins, stimulating future research on these important protein families.







The Endothelium


Book Description

The endothelium, a monolayer of endothelial cells, constitutes the inner cellular lining of the blood vessels (arteries, veins and capillaries) and the lymphatic system, and therefore is in direct contact with the blood/lymph and the circulating cells. The endothelium is a major player in the control of blood fluidity, platelet aggregation and vascular tone, a major actor in the regulation of immunology, inflammation and angiogenesis, and an important metabolizing and an endocrine organ. Endothelial cells controls vascular tone, and thereby blood flow, by synthesizing and releasing relaxing and contracting factors such as nitric oxide, metabolites of arachidonic acid via the cyclooxygenases, lipoxygenases and cytochrome P450 pathways, various peptides (endothelin, urotensin, CNP, adrenomedullin, etc.), adenosine, purines, reactive oxygen species and so on. Additionally, endothelial ectoenzymes are required steps in the generation of vasoactive hormones such as angiotensin II. An endothelial dysfunction linked to an imbalance in the synthesis and/or the release of these various endothelial factors may explain the initiation of cardiovascular pathologies (from hypertension to atherosclerosis) or their development and perpetuation. Table of Contents: Introduction / Multiple Functions of the Endothelial Cells / Calcium Signaling in Vascular Cells and Cell-to-Cell Communications / Endothelium-Dependent Regulation of Vascular Tone / Conclusion / References




The Membranes of Cells


Book Description

In this new edition of The Membranes of Cells, all of the chapters have been updated, some have been completely rewritten, and a new chapter on receptors has been added. The book has been designed to provide both the student and researcher with a synthesis of information from a number of scientific disciplines to create a comprehensive view of the structure and function of the membranes of cells. The topics are treated in sufficient depth to provide an entry point to the more detailed literature needed by the researcher. Key Features * Introduces biologists to membrane structure and physical chemistry * Introduces biophysicists to biological membrane function * Provides a comprehensive view of cell membranes to students, either as a necessary background for other specialized disciplines or as an entry into the field of biological membrane research * Clarifies ambiguities in the field