Download or read book The Myofilament Basis of Striated Muscle Function written by Joseph D. Powers and published by . This book was released on 2018 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: For over a century, understanding the subcellular mechanisms that regulate striated muscle function has been of great interest to biophysicists and physiologists. During contraction-relaxation cycles, both skeletal and cardiac myocytes undergo tremendous structural and geometrical dynamics that are driven by complex sarcomere-level regulatory processes. Yet, despite much effort, many sarcomere-based mechanisms of the regulation of muscle function have remained unresolved. The body of work presented here is aimed at revealing such mechanisms by leveraging recent advances in structural, mechanical, and computational biology. Specifically, we integrate: (i) experimental techniques to study sarcomere mechanics in situ, (ii) high-resolution X-ray diffraction-based imaging modalities of myofilament and sarcomere structure, (iii) spatially explicit computational models of sarcomere mechanics and energetics, and (iv) genetic engineering of murine models of heart failure harboring cardiomyopathy-associated myofilament protein mutations. In doing so, we provide insight into the molecular mechanisms that govern the regulation (and dysregulation) of straited muscle function. Moreover, this work focusses on uncovering contributions to regulatory mechanisms of muscle function from each of the three main myofilaments of the sarcomere: the myosin-containing thick filament, the actin-containing thin filament, and the giant filamentous protein titin. First, we describe a spatially explicit computational model that explores how titin stiffness affects contractile mechanics and energetics. We find that increasing titin stiffness inhibits the ability of myosin motors to energetically compete with the added titin-based strain in the thick filament and are therefore less efficient in generating force compared with motors in series with compliant titin. Second, we measure the contributions of titin to the elasticity of the sarcomere in-situ in single intact skeletal muscle fibers throughout the duration of isometric tetanus. We show that titin the I-band region of titin has a dynamic stiffness that is tuned to the length of the sarcomere, likely mediated by load-dependent structural dynamics of the I-band-specific domains. Third, we present multiple studies that harness high-intensity synchrotron light to enable Angstrom-level X-ray diffraction-based measurements of the myofilament structure in cardiac muscle. Through this technique, we investigate the structural dynamics of myosin motors in resting and activated cardiac muscle and find that some positively inotropic interventions have no effect on resting sarcomere structure, whereas others perturb the resting state of the thick filament to potentiate the ensuing contraction. Lastly, we use a transgenic murine model harboring a loss-of-function tropomyosin mutation that causes dilated cardiomyopathy. We show that both sarcomere-level and tissue-level dysfunction can be prevented by rationally designing filament-specific interventions. To summarize, the work presented here highlights results from an integrative approach that aims to understand myofilament-specific mechanisms that govern regulation of both cardiac and skeletal muscle function. As a result, we answer questions that range from a basic understanding of molecular-level regulation of muscle function to developing potential therapeutics that may translate to the clinic for patients with specific types of congenital heart failure.
Download or read book Anatomy Physiology written by Lindsay Biga and published by . This book was released on 2019-09-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A version of the OpenStax text
Download or read book C Elegans II written by Donald L. Riddle and published by Firefly Books. This book was released on 1997 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defines the current status of research in the genetics, anatomy, and development of the nematode C. elegans, providing a detailed molecular explanation of how development is regulated and how the nervous system specifies varied aspects of behavior. Contains sections on the genome, development, neural networks and behavior, and life history and evolution. Appendices offer genetic nomenclature, a list of laboratory strain and allele designations, skeleton genetic maps, a list of characterized genes, a table of neurotransmitter assignments for specific neurons, and information on codon usage. Includes bandw photos. For researchers in worm studies, as well as the wider community of researchers in cell and molecular biology. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Mechanisms of Vascular Disease written by Robert Fitridge and published by University of Adelaide Press. This book was released on 2011 with total page 589 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Skeletal Muscle Structure Function and Plasticity written by Richard L. Lieber and published by Lippincott Williams & Wilkins. This book was released on 2002 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: In its Second Edition, this text addresses basic and applied physiological properties of skeletal muscle in the context of the physiological effects from clinical treatment. Many concepts are expanded and recent studies on human muscle have been added. This new edition also includes more clinically relevant cases and stories. A two-page full color insert of muscle sections is provided to ensure integral understanding of the concepts presented in the text. Anyone interested in human movement analysis and the understanding of generation and control from the musculoskeletal and neuromuscular systems in implementing movement will find this a valuable resource.
Download or read book Disorders of Voluntary Muscle written by George Karpati and published by Cambridge University Press. This book was released on 2001-07-12 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rewritten and redesigned, this remains the one essential text on the diseases of skeletal muscle.
Download or read book Molecular Biology of The Cell written by Bruce Alberts and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Botulinum Neurotoxins written by Andreas Rummel and published by Springer. This book was released on 2015-01-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The extremely potent substance botulinum neurotoxin (BoNT) has attracted much interest in diverse fields. Originally identified as cause for the rare but deadly disease botulism, military and terrorist intended to misuse this sophisticated molecule as biological weapon. This caused its classification as select agent category A by the Centers for Diseases Control and Prevention and the listing in the Biological and Toxin Weapons Convention. Later, the civilian use of BoNT as long acting peripheral muscle relaxant has turned this molecule into an indispensable pharmaceutical world wide with annual revenues >$1.5 billion. Also basic scientists value the botulinum neurotoxin as molecular tool for dissecting mechanisms of exocytosis. This book will cover the most recent molecular details of botulinum neurotoxin, its mechanism of action as well as its detection and application.
Download or read book Anatomy and Physiology written by J. Gordon Betts and published by . This book was released on 2013-04-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Basic Physiology for Anaesthetists written by David Chambers and published by Cambridge University Press. This book was released on 2019-07-25 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Easily understood, up-to-date and clinically relevant, this book provides junior anaesthetists with an essential physiology resource.
Download or read book Fundamentals of Anaesthesia written by Colin Pinnock and published by Cambridge University Press. This book was released on 2002-12 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Functional Ultrastructure written by Margit Pavelka and published by Springer Science & Business Media. This book was released on 2010-07-16 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The period between 1950 and 1980 were the golden unique insights into how pathological processes affect years of transmission electron microscopy and produced cell organization. a plethora of new information on the structure of cells This information is vital to current work in which that was coupled to and followed by biochemical and the emphasis is on integrating approaches from functional studies. TEM was king and each micrograph proteomics, molecular biology, genetics, genomics, of a new object produced new information that led to molecular imaging and physiology and pathology to novel insights on cell and tissue organization and their understand cell functions and derangements in disease. functions. The quality of data represented by the images In this current era, there is a growing tendency to of cell and tissues had been perfected to a very high level substitut e modern light microscopic techniques for by the great microscopists of that era including Palade, electron microscopy, because it is less technically Porter, Fawcett, Sjostrand, Rhodin and many others. At demanding and is more readily available to researchers- present, the images that we see in leading journals for This atlas reminds us that the information obtained by the most part do not reach the same technical level and electron microscopy is invaluable and has no substitute.
Download or read book An Introduction to Smooth Muscle Mechanics 2nd Edition written by Chun Y. Seow and published by Cambridge Scholars Publishing. This book was released on 2020-11-13 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Muscle Biophysics written by Rassier Dilson J.E and published by Springer Science & Business Media. This book was released on 2010-09-08 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Muscle contraction has been the focus of scientific investigation for more than two centuries, and major discoveries have changed the field over the years. Early in the twentieth century, Fenn (1924, 1923) showed that the total energy liberated during a contraction (heat + work) was increased when the muscle was allowed to shorten and perform work. The result implied that chemical reactions during contractions were load-dependent. The observation underlying the “Fenn effect” was taken to a greater extent when Hill (1938) published a pivotal study showing in details the relation between heat production and the amount of muscle shortening, providing investigators with the force-velocity relation for skeletal muscles. Subsequently, two papers paved the way for the current paradigm in the field of muscle contraction. Huxley and Niedergerke (1954), and Huxley and Hanson (1954) showed that the width of the A-bands did not change during muscle stretch or activation. Contraction, previously believed to be caused by shortening of muscle filaments, was associated with sliding of the thick and thin filaments. These studies were followed by the classic paper by Huxley (1957), in which he conceptualized for the first time the cross-bridge theory; filament sliding was driven by the cyclical interactions of myosin heads (cross-bridges) with actin. The original cross-bridge theory has been revised over the years but the basic features have remained mostly intact. It now influences studies performed with molecular motors responsible for tasks as diverse as muscle contraction, cell division and vesicle transport.
Download or read book Concepts of Biology written by Samantha Fowler and published by . This book was released on 2018-01-07 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-level science course. As such, this course represents an important opportunity for students to develop the necessary knowledge, tools, and skills to make informed decisions as they continue with their lives. Rather than being mired down with facts and vocabulary, the typical non-science major student needs information presented in a way that is easy to read and understand. Even more importantly, the content should be meaningful. Students do much better when they understand why biology is relevant to their everyday lives. For these reasons, Concepts of Biology is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand.We also strive to show the interconnectedness of topics within this extremely broad discipline. In order to meet the needs of today's instructors and students, we maintain the overall organization and coverage found in most syllabi for this course. A strength of Concepts of Biology is that instructors can customize the book, adapting it to the approach that works best in their classroom. Concepts of Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand--and apply--key concepts.
Download or read book The Cytoskeleton written by Thomas Dean Pollard and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cytoskeleton is the intracellular filament system that controls the morphology of a cell, allows it to move, and provides trafficking routes for intracellular transport. It comprises three major filament systems-actin, microtubules, and intermediate filaments-along with a host of adaptors, regulators, molecular motors, and additional structural proteins. This textbook presents a comprehensive and up-to-date view of the cytoskeleton, cataloguing its many different components and explaining how they are functionally integrated in different cellular processes. It starts by laying out the basic molecular hardware, before describing in detail how these components are assembled in cells and linked to neighboring cells and the extracellular matrix to maintain tissue architecture. It then surveys the roles of the cytoskeleton in processes such as intracellular transport, cell motility, signal transduction, and cell division. The book is thus essential reading for students learning about intracellular structure. It also represents a vital reference for all cell and developmental biologists working in this field.
Download or read book Neurobiology of Motor Control written by Scott L. Hooper and published by John Wiley & Sons. This book was released on 2017-09-05 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-disciplinary look at the current state of knowledge regarding motor control and movement—from molecular biology to robotics The last two decades have seen a dramatic increase in the number of sophisticated tools and methodologies for exploring motor control and movement. Multi-unit recordings, molecular neurogenetics, computer simulation, and new scientific approaches for studying how muscles and body anatomy transform motor neuron activity into movement have helped revolutionize the field. Neurobiology of Motor Control brings together contributions from an interdisciplinary group of experts to provide a review of the current state of knowledge about the initiation and execution of movement, as well as the latest methods and tools for investigating them. The book ranges from the findings of basic scientists studying model organisms such as mollusks and Drosophila, to biomedical researchers investigating vertebrate motor production to neuroengineers working to develop robotic and smart prostheses technologies. Following foundational chapters on current molecular biological techniques, neuronal ensemble recording, and computer simulation, it explores a broad range of related topics, including the evolution of motor systems, directed targeted movements, plasticity and learning, and robotics. Explores motor control and movement in a wide variety of organisms, from simple invertebrates to human beings Offers concise summaries of motor control systems across a variety of animals and movement types Explores an array of tools and methodologies, including electrophysiological techniques, neurogenic and molecular techniques, large ensemble recordings, and computational methods Considers unresolved questions and how current scientific advances may be used to solve them going forward Written specifically to encourage interdisciplinary understanding and collaboration, and offering the most wide-ranging, timely, and comprehensive look at the science of motor control and movement currently available, Neurobiology of Motor Control is a must-read for all who study movement production and the neurobiological basis of movement—from molecular biologists to roboticists.
