Regulation Of Smooth Muscle Contraction

Author : Robert S. Moreland
Publisher : Springer Science & Business Media
Page : 547 pages
File Size : 53,7 Mb
Release : 2012-12-06
Category : Medical
ISBN : 9781468460032

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Regulation of Smooth Muscle Contraction by Robert S. Moreland Pdf

Sixth Annual Graduate Hospital Research Symposium REGULATION OF SMOOTH MUSCLE PROGRESS IN SOLVING THE PUZZLE Every so often a scientific conference comes at a time when everyone has new and exciting information, when old "dogmas" do not seem to be as well established, and when speakers and participants alike are ready to challenge interpretations of old and new experimental data. This was such a conference. What turns on a smooth muscle cell? The precise answer to this question has eluded scientists for much longer than I have been involved in the field. We know that an increase in cytosolic calcium is necessary and we know that phosphorylation of the 20 kDa myosin light chain is an important step in the process. We do not know if other processes are necessary for the initiation and lor maintenance of a smooth muscle contraction nor do we know if other processes modulate the regulation of contraction. The goal of the symposium on which this volume is based was to explore the most current hypotheses for the answers to these questions. I believe that after reading the chapters included in this volume, you will agree that this goal was achieved. The importance of calcium and calmodulin dependent myosin light chain phosphoryla tion in the regulation of smooth muscle contraction was reinforced by many presentations. However, the status of myosin light chain phosphorylation as a simple calcium dependent switch came under serious suspicion.

Author : Robert Fitridge,M. M. Thompson
Publisher : University of Adelaide Press
Page : 589 pages
File Size : 54,6 Mb
Release : 2011
Category : Medical
ISBN : 9781922064004

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Mechanisms of Vascular Disease by Robert Fitridge,M. M. Thompson Pdf

New updated edition first published with Cambridge University Press. This new edition includes 29 chapters on topics as diverse as pathophysiology of atherosclerosis, vascular haemodynamics, haemostasis, thrombophilia and post-amputation pain syndromes.

Author : L.M.G. Heilmeyer
Publisher : Springer Science & Business Media
Page : 370 pages
File Size : 45,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781475701661

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Signal Transduction and Protein Phosphorylation by L.M.G. Heilmeyer Pdf

Author : Sushil K. Sarna
Publisher : Biota Publishing
Page : 159 pages
File Size : 46,7 Mb
Release : 2010-11-01
Category : Medical
ISBN : 9781615041510

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Colonic Motility by Sushil K. Sarna Pdf

Three distinct types of contractions perform colonic motility functions. Rhythmic phasic contractions (RPCs) cause slow net distal propulsion with extensive mixing/turning over. Infrequently occurring giant migrating contractions (GMCs) produce mass movements. Tonic contractions aid RPCs in their motor function. The spatiotemporal patterns of these contractions differ markedly. The amplitude and distance of propagation of a GMC are several-fold larger than those of an RPC. The enteric neurons and smooth muscle cells are the core regulators of all three types of contractions. The regulation of contractions by these mechanisms is modifiable by extrinsic factors: CNS, autonomic neurons, hormones, inflammatory mediators, and stress mediators. Only the GMCs produce descending inhibition, which accommodates the large bolus being propelled without increasing muscle tone. The strong compression of the colon wall generates afferent signals that are below nociceptive threshold in healthy subjects. However, these signals become nociceptive; if the amplitudes of GMCs increase, afferent nerves become hypersensitive, or descending inhibition is impaired. The GMCs also provide the force for rapid propulsion of feces and descending inhibition to relax the internal anal sphincter during defecation. The dysregulation of GMCs is a major factor in colonic motility disorders: irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and diverticular disease (DD). Frequent mass movements by GMCs cause diarrhea in diarrhea predominant IBS, IBD, and DD, while a decrease in the frequency of GMCs causes constipation. The GMCs generate the afferent signals for intermittent short-lived episodes of abdominal cramping in these disorders. Epigenetic dysregulation due to adverse events in early life is one of the major factors in generating the symptoms of IBS in adulthood.

Author : Michael Barany
Publisher : Elsevier
Page : 418 pages
File Size : 43,5 Mb
Release : 1996-01-04
Category : Science
ISBN : 0080527892

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Biochemistry of Smooth Muscle Contraction by Michael Barany Pdf

This valuable resource provides a systematic account of the biochemistry of smooth muscle contraction. As a comprehensive guide to this rapidly growing area of research, it covers the structure and characteristic properties of contractile and regulatory proteins, with special emphasis on their predicted function in the live muscle. Also included in this book are intermediate filament proteins, and desmin and vimentin, whose function in smooth muscle is unknown; and several enzymes involved in the phosphorylation-dephosphorylation of contractile and other proteins.

Author : Robert S Moreland
Publisher : Unknown
Page : 576 pages
File Size : 55,5 Mb
Release : 1992-01-31
Category : Electronic
ISBN : 1468460048

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Regulation of Smooth Muscle Contraction by Robert S Moreland Pdf

Author : J. Gordon Betts,Peter DeSaix,Jody E. Johnson,Oksana Korol,Dean H. Kruse,Brandon Poe,James A. Wise,Mark Womble,Kelly A. Young
Publisher : Unknown
Page : 0 pages
File Size : 46,9 Mb
Release : 2013-04-25
Category : Electronic
ISBN : 1947172808

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Anatomy and Physiology by J. Gordon Betts,Peter DeSaix,Jody E. Johnson,Oksana Korol,Dean H. Kruse,Brandon Poe,James A. Wise,Mark Womble,Kelly A. Young Pdf

Author : Lindsay Biga,Devon Quick,Sierra Dawson,Amy Harwell,Robin Hopkins,Joel Kaufmann,Mike LeMaster,Philip Matern,Katie Morrison-Graham,Jon Runyeon
Publisher : Unknown
Page : 128 pages
File Size : 50,5 Mb
Release : 2019-09-26
Category : Electronic
ISBN : 1955101159

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Anatomy & Physiology by Lindsay Biga,Devon Quick,Sierra Dawson,Amy Harwell,Robin Hopkins,Joel Kaufmann,Mike LeMaster,Philip Matern,Katie Morrison-Graham,Jon Runyeon Pdf

A version of the OpenStax text

Author : Chun Y. Seow
Publisher : Cambridge Scholars Publishing
Page : 189 pages
File Size : 45,8 Mb
Release : 2020-11-13
Category : Medical
ISBN : 9781527562288

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An Introduction to Smooth Muscle Mechanics (2nd Edition) by Chun Y. Seow Pdf

This second edition is an updated version of an introductory level textbook intended for students who are interested in understanding the mechanical properties of smooth muscle. Compared with skeletal and cardiac muscles, smooth muscle is the least understood in terms of its contraction mechanism and the structure of its contractile apparatus. Nevertheless, it is an important tissue that is vital in many organ functions, such as blood pressure control, intestinal peristalsis, and the emptying of the bladder. Dysfunction of the muscle has been implicated in many diseases such as high blood pressure, asthma, and overactive bladders. This is the only book-length treatment of functional models of a variety of smooth muscle behaviors with their corresponding mathematical descriptions, and offers an easy-to-follow, step-by-step mathematical derivation that will help students to appreciate the muscle cell as a fine-tuned aggregate of mechanisms governed by the fundamental laws of physics. In addition to providing a detailed description of the known subcellular structure and mechanical function of the contractile apparatus of smooth muscle, it also covers experimentation techniques, instrumentation, and data analysis. The book is a must-have information source for anyone interested in smooth muscle cell ultrastructure, physiology, biochemistry, and pharmacology.

Author : Peter Gunning
Publisher : Springer Science & Business Media
Page : 323 pages
File Size : 50,6 Mb
Release : 2009-09-30
Category : Medical
ISBN : 9780387857664

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Tropomyosin by Peter Gunning Pdf

A recent review of one of my grant applications commented on the ‘rediscovery of tropomyosin’. I was tempted to write back in my rebuttal to the reviewer that I didn’t realise it had been lost. Uncharacteristic maturity prevailed and I resisted the temptation, but I was struck by the underlying observation that research on the str- ture and function of tropomyosin has been somewhat invisible, particularly in terms of the cytoskeleton isoforms. So, how can it be that one of the two major components of the actin filament has been so thoroughly overlooked? I suspect that the answer is disappointingly pedestrian. Whereas the biochemistry of the 1980s revealed the potential of tropomyosin isoforms to diversify the function of actin filaments, the subsequent disenchantment with isoform biology in general in the 1990s inhibited growth of this field. With the development of more sophisticated experimental - proaches we are now seeing a growing realisation of the importance of tropomyosin in regulating actin filaments beyond its pivotal role in muscle contraction. The opportunity to edit this book came at a time when we had written several reviews on different aspects of tropomyosin function and I had just finished the background reading for a comprehensive review of tropomyosin biology. I realised that the field was simply beyond the capacity of any one person to do the field j- tice.

Author : Ronald J. Korthuis
Publisher : Morgan & Claypool Publishers
Page : 147 pages
File Size : 46,7 Mb
Release : 2011
Category : Medical
ISBN : 9781615041831

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Skeletal Muscle Circulation by Ronald J. Korthuis Pdf

The aim of this treatise is to summarize the current understanding of the mechanisms for blood flow control to skeletal muscle under resting conditions, how perfusion is elevated (exercise hyperemia) to meet the increased demand for oxygen and other substrates during exercise, mechanisms underlying the beneficial effects of regular physical activity on cardiovascular health, the regulation of transcapillary fluid filtration and protein flux across the microvascular exchange vessels, and the role of changes in the skeletal muscle circulation in pathologic states. Skeletal muscle is unique among organs in that its blood flow can change over a remarkably large range. Compared to blood flow at rest, muscle blood flow can increase by more than 20-fold on average during intense exercise, while perfusion of certain individual white muscles or portions of those muscles can increase by as much as 80-fold. This is compared to maximal increases of 4- to 6-fold in the coronary circulation during exercise. These increases in muscle perfusion are required to meet the enormous demands for oxygen and nutrients by the active muscles. Because of its large mass and the fact that skeletal muscles receive 25% of the cardiac output at rest, sympathetically mediated vasoconstriction in vessels supplying this tissue allows central hemodynamic variables (e.g., blood pressure) to be spared during stresses such as hypovolemic shock. Sympathetic vasoconstriction in skeletal muscle in such pathologic conditions also effectively shunts blood flow away from muscles to tissues that are more sensitive to reductions in their blood supply that might otherwise occur. Again, because of its large mass and percentage of cardiac output directed to skeletal muscle, alterations in blood vessel structure and function with chronic disease (e.g., hypertension) contribute significantly to the pathology of such disorders. Alterations in skeletal muscle vascular resistance and/or in the exchange properties of this vascular bed also modify transcapillary fluid filtration and solute movement across the microvascular barrier to influence muscle function and contribute to disease pathology. Finally, it is clear that exercise training induces an adaptive transformation to a protected phenotype in the vasculature supplying skeletal muscle and other tissues to promote overall cardiovascular health. Table of Contents: Introduction / Anatomy of Skeletal Muscle and Its Vascular Supply / Regulation of Vascular Tone in Skeletal Muscle / Exercise Hyperemia and Regulation of Tissue Oxygenation During Muscular Activity / Microvascular Fluid and Solute Exchange in Skeletal Muscle / Skeletal Muscle Circulation in Aging and Disease States: Protective Effects of Exercise / References

Author : Mohamed Trebak,Scott Earley
Publisher : CRC Press
Page : 412 pages
File Size : 47,9 Mb
Release : 2018-08-06
Category : Medical
ISBN : 9781498774239

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Signal Transduction and Smooth Muscle by Mohamed Trebak,Scott Earley Pdf

All hollow organs, such as blood vessels, the gastrointestinal tract, airways, male and female reproductive systems, and the urinary bladder are primarily composed of smooth muscle. Such organs regulate flow, propulsion and mixing of luminal contents and storage by the contraction and relaxation of smooth muscle cells. Smooth muscle cells respond to numerous inputs, including pressure, shear stress, intrinsic and extrinsic innervation, hormones and other circulating molecules, as well as autocrine and paracrine factors. This book is a review of smooth muscle cell regulation in the cardiovascular, reproductive, GI, and other organ systems with emphasis on calcium and receptor signaling. Key selling features: Focuses on smooth muscles of different types Describes ion channel signaling mechanisms Reviews calcium and receptor signaling Includes novel, cutting-edge methodologies Summarizes studies of mice with genetically encoding sensors in smooth muscle Chapter 9 of this book is freely available as a downloadable Open Access PDF under a CC-BY 4.0 license. https://s3-us-west-2.amazonaws.com/tandfbis/rt-files/docs/Open+Access+Chapters/9781498774222_oachapter9.pdf

Author : Colin Pinnock,Ted Lin,Robert Jones,Tim Smith
Publisher : Cambridge University Press
Page : 990 pages
File Size : 50,8 Mb
Release : 2002-12
Category : Medical
ISBN : 052169079X

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Fundamentals of Anaesthesia by Colin Pinnock,Ted Lin,Robert Jones,Tim Smith Pdf

The second edition of Fundamentals of Anaesthesia builds upon the success of the first edition, and encapsulates the modern practice of anaesthesia in a single volume. Written and edited by a team of expert contributors, it provides a comprehensive but easily readable account of all of the information required by the FRCA Primary examination candidate and has been expanded to include more detail on all topics and to include new topics now covered in the examination. As with the previous edition, presentation of information is clear and concise, with the use of lists, tables, summary boxes and line illustrations where necessary to highlight important information and aid the understanding of complex topics. Great care has been taken to ensure an unrivalled consistency of style and presentation throughout.

Author : Michel Félétou
Publisher : Morgan & Claypool Publishers
Page : 309 pages
File Size : 47,8 Mb
Release : 2011
Category : Science
ISBN : 9781615041237

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The Endothelium by Michel Félétou Pdf

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

Author : Takeshi Nakano,David J. Hartshorne
Publisher : Springer Science & Business Media
Page : 240 pages
File Size : 55,5 Mb
Release : 2012-12-06
Category : Medical
ISBN : 9784431658801

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Regulation of the Contractile Cycle in Smooth Muscle by Takeshi Nakano,David J. Hartshorne Pdf

At the Mie International Symposium held in Japan in April 1994, leading scientists reviewed recent advances in the understanding of the contractile mechanism in smooth muscle. The present volume collects the papers presented at the symposium, summarizing the latest advances in smooth muscle function and emphasizing important components of the contraction-relaxation cycle. Topics include a discussion of the smooth muscle cell membrane, with emphasis on its ion channels; the regulation of cytosolic Ca2+ levels and the relationship to force in smooth muscle; aspects of the two key regulatory enzymes involved with myosin phosphorylation-dephosphorylation; the molecular basis for pharmacomechanical coupling in smooth muscle; developments in the basic contractile mechanisms involving the crossbridge cycle of tonic and phasic muscle; the role of myosin light chains; and many others. The approach is broad and presents contemporary opinions in pharmacology, physiology, and biochemistry as they relate to smooth muscle function. The book will appeal not only to those working in these disciplines, but to vascular clinicians, obstetric-gynecological physicians, and gastroenterologists as well.