Download or read book Molecular Dynamics at the Immunological Synapse written by Pedro Roda-Navarro and published by Frontiers Media SA. This book was released on 2017-03-21 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The immunological synapse (IS) is a specialised cell-cell adhesion that mediates antigen acquisition and regulates the activation of lymphocytes. Initial studies of the IS showed a structure composed of stable supra-molecular activation clusters (SMAC) organised during the interaction of helper T lymphocytes with B lymphocytes, working as antigen presenting cells. A central SMAC of coalesced T cell receptors (TCRs) and a peripheral SMAC for cell-cell adhesion were observed. IS with similar structure was later described during antigen acquisition by B cells and during the interaction of NK cells with target and healthy cells. More recent research developed with microscopy systems that improve the spatial and temporal resolution has showed the complex molecular dynamics at the IS that governs lymphocyte activation. Currently, the IS is seen as a three-dimensional structure where signalling networks for lymphocyte activation and endosomal and cytoskeleton machinery are polarised. A view has emerged in which dynamic microclusters of signalling complexes are composed of molecular components attached to the plasma membrane and other components conveyed on sub-synaptic vesicles transported to the membrane by cytoskeletal fibers and motor proteins. Much information is nonetheless missing about how the dynamics of the endosomal compartment, the cytoskeleton, and signalling complexes are reciprocally regulated to achieve the function of lymphocytes. Experimental evidence also suggests that the environment surrounding lymphocytes exposed to different antigenic challenge regulates IS assembly and functional output, making an even more complex scenario still far from being completely understood. Also, although some signalling molecular components for lymphocyte activation have been identified and thoroughly studied, the function of other molecules has not been yet uncovered or deeply characterised. This research topic aims to provide the reader with the latest information about the molecular dynamics governing lymphocyte activation. These molecular dynamics dictate cell decisions. Thus, we expect that understanding them will provide new avenues for cell manipulation in therapies to treat different immune-related pathologies.
Download or read book Molecular Dynamics at the Immunological Synapse written by and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The immunological synapse (IS) is a specialised cell-cell adhesion that mediates antigen acquisition and regulates the activation of lymphocytes. Initial studies of the IS showed a structure composed of stable supra-molecular activation clusters (SMAC) organised during the interaction of helper T lymphocytes with B lymphocytes, working as antigen presenting cells. A central SMAC of coalesced T cell receptors (TCRs) and a peripheral SMAC for cell-cell adhesion were observed. IS with similar structure was later described during antigen acquisition by B cells and during the interaction of NK cells with target and healthy cells. More recent research developed with microscopy systems that improve the spatial and temporal resolution has showed the complex molecular dynamics at the IS that governs lymphocyte activation. Currently, the IS is seen as a three-dimensional structure where signalling networks for lymphocyte activation and endosomal and cytoskeleton machinery are polarised. A view has emerged in which dynamic microclusters of signalling complexes are composed of molecular components attached to the plasma membrane and other components conveyed on sub-synaptic vesicles transported to the membrane by cytoskeletal fibers and motor proteins. Much information is nonetheless missing about how the dynamics of the endosomal compartment, the cytoskeleton, and signalling complexes are reciprocally regulated to achieve the function of lymphocytes. Experimental evidence also suggests that the environment surrounding lymphocytes exposed to different antigenic challenge regulates IS assembly and functional output, making an even more complex scenario still far from being completely understood. Also, although some signalling molecular components for lymphocyte activation have been identified and thoroughly studied, the function of other molecules has not been yet uncovered or deeply characterised. This research topic aims to provide the reader with the latest information about the molecular dynamics governing lymphocyte activation. These molecular dynamics dictate cell decisions. Thus, we expect that understanding them will provide new avenues for cell manipulation in therapies to treat different immune-related pathologies.
Download or read book The Immune Synapse written by Cosima T. Baldari and published by Springer Nature. This book was released on 2023-04-27 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new collection features the most up-to-date essential protocols that are currently being used to study the immune synapse. Beginning with methods for making biophysical measurements, the volume continues by covering the cell biology of synapses, methods for advanced substrate engineering, mechanobiology topics, new technologies to describe and manipulate synaptic components, as well as methods related to sites of action and immunotherapy. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step and readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and fully updated, The Immune Synapse: Methods and Protocols, Second Edition serves as an ideal practical guide for researchers working in this dynamic field. Chapters 5, 11, 18, 27, 30, and 32 are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.
Download or read book Molecular Scale Dynamics of T Cell Immunological Synapse Components by Advanced and Super resolution Fluorescence Microscopy written by George Ashdown and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Interactions in Immunological Synapse Formation and T Cell Activation written by Shannon Kimberly Bromley and published by . This book was released on 2001 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Immunological Synapse Part A written by and published by Elsevier. This book was released on 2023-01-16 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Immunological Synapse, Part A, Volume 173 in the Methods in Cell Biology series provides state-of-the-art methods for the study of the immunological synapse. Sections cover Imaging polarized granule release at the cytotoxic T cell immunological synapse using TIRF microscopy: control by polarity regulators, Analysis of centrosomal area actin reorganization and centrosome polarization upon lymphocyte activation at the immunological synapse, P815-based redirected degranulation assay to study human NK cell effector functions, Cytotoxic and Chemotactic Dynamics of Natural Killer Cells Quantified by Live-cell Imaging, Quantification of interaction frequency between antigen-presenting cells and T cells by conjugation assay, and more. Other chapters focus on the Study of the Effects of NK-Tumor Cell Interaction by Proteomic Analysis and Imaging, Quantification of lymphocytic choriomeningitis virus specific T cells and LCMV viral titers, Quantification of lymphocytic choriomeningitis virus specific T cells and LCMV viral titers, An in vitro model to monitor natural killer cell effector functions against primary breast cancer, and Standardized Protocol for the Evaluation of Chimeric Antigen Receptor (CAR)-modified Cell Immunological Synapse Quality using the Glass-supported Planar L. Covers various methods related to the study of the immunological synapse Includes detailed, point-by-point, methods as well as various important notes Provides the authority and expertise from an international board of leading scientists
Download or read book Immunological Synapse written by Takashi Saito and published by Springer Science & Business Media. This book was released on 2009-12-03 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proper physiological functioning of most eukaryotic cells requires their assembly into multi-cellular tissues that form organized organ systems. Cells of the immune system develop in bone marrow and lymphoid organs, but as the cells mature they leave these organs and circulate as single cells. Antigen receptors (TCRs) of T cells search for membrane MHC proteins that are bound to peptides derived from infectious pathogens or cellular transformations. The detection of such speci?c peptide–MHC antigens initiates T cell activation, adhesion, and immune-effectors functions. Studies of normal and transformed T cell lines and of T cells from transgenic mice led to comprehensive understanding of the mole- lar basis of antigen-receptor recognition and signaling. In spite of these remarkable genetic and biochemical advances, other key physiological mechanisms that par- cipate in sensing and decoding the immune context to induce the appropriate cellular immune responses remain unresolved. TCR recognition is tightly regulated to trigger sensitive but balanced T cell responses that result in the effective elimination of the pathogens while minimizing collateral damage to the host. The sensitivity of TCR recognition has to be properly tempered to prevent unintended activation by self-peptide–MHC complexes that cause autoimmune diseases. It is likely that once the TCR is engaged by a peptide– MHC and TCR signaling begins, additional regulatory mechanisms, involving other receptors, would increase the ?delity of the response.
Download or read book Molecular Scale Dynamics of T Cell Immunological Synapse Components by Advanced and Super resolution Flourescence Microscopy written by George W. Ashdown and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, vesicle cargo was shown to correlate with different vesicle populations, based on their membrane order, demonstrating vesicle order may mirror the heterogeneous nature of the PM. These results demonstrate the complex biophysical processes that control the T cell immunological synapse are an amalgamation of cytoskeletal organisation, vesicle dynamics and membrane polarity.
Download or read book The Immunological Synapse Part B written by and published by Elsevier. This book was released on 2023-07-27 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Immunological Synapse - Part B, Volume 178 in the Methods in Cell Biology series provides state-of-the-art methods for the study of the immunological synapse. This first volume covers various aspects on T cell and natural killer (NK) cell synapses, including imaging polarized granule release using TIRF microscopy, analysis of actin reorganization and centrosome polarization, redirected degranulation, live cell-imaging to quantify cytotoxic and chemotactic dynamics, quantification of interactions between APCs and T cells, assessment of membrane lipid state at the immunological synapse, proteomic analysis and imaging of NK-tumor cell interaction, evaluating natural killer cell effector functions against breast cancer cells derived from human tumor tissue, evaluation of chimeric antigen receptor (CAR)-modified cell immunological synapse quality using the glass-supported planar lipid bilayer, and monitoring potency of therapeutic CAR T cells. It also includes one chapter on quantification of lymphocytic choriomeningitis virus specific T cells and LCMV viral titers, and one chapter on the murine antibody-dependent cellular phagocytosis assay. Covers various methods related to the study of the immunological synapse Includes detailed, point-by-point, methods as well as various important notes Provides the authority and expertise from an international board of leading scientists
Download or read book Plasma Membrane Dynamics and Pattern Formation During T Cell Activation written by Adam D. Douglass and published by . This book was released on 2006 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: T cell activation entails a complex series of signal transduction events that begin with ligation of the T cell receptor by a cognate antigen, displayed on the surface of an antigen presenting cell. During T cell signaling proteins in the cell surface partition from one another into large, stereotyped molecular pattern that is known as the immunological synapse. This thesis attempts to understand the mechanisms by which this segregation occurs, and uses a number of fluorescence imaging techniques---in particular, single molecule microscopy---to this end. Contrary to reports that suggest a role for lipid raft domains in patterning the synapse, we find that protein-protein interactions, and not putative lipid raft associations, are a strong driving force in synapse formation. We also develop a method for reconstituting synapse formation in an immortalized T cell line that allows us to perform single molecule imaging on a fluid substrate of a defined composition. A common finding is that both passive mechanisms, involving diffusional trapping and exclusion, as well as active mechanisms, involving actin-driven transport, can act in concert to shape the immunological synapse.
Download or read book Major Histocompatibility Complex MHC in Health and Disease written by Jerzy K. Kulski and published by MDPI. This book was released on 2020-01-15 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major histocompatibility complex (MHC) is a highly polymorphic and diverse multigene locus in all jawed vertebrate species that has an integral role in adaptive/innate immune systems, transplantation, and infectious and autoimmune diseases. The MHC supra-locus in mammalian vertebrates is usually partitioned into three distinct regions, known as classes I, II, and III, which, to varying extents, can be found conserved in nonmammalian jawed vertebrates, such as bony fish, amphibians, and bird lineages. The MHC gene region is characterized particularly by the expression of class I and class II glycoproteins that bind peptides derived from intracellular or extracellular antigens to circulating T-cells. While this expressed antigenic specificity remains the predominant interest with respect to MHC function and polymorphism in a population, a broader concept has emerged that examines the MHC as a multifunctional polymorphic controller that facilitates and regulates genome diversity with a much greater array of functions and effects than just MHC-restricted antigen recognition. This volume of 19 reprints presented by various experts and collected from the Special Issue of Cells on “MHC in Health and Disease” covers a broad range of topics on the genomic diversity of the MHC regulatory system in various vertebrate species, including MHC class I, II, and III genes; innate and adaptive immunity; neurology; transplantation; haplotypes; infectious and autoimmune diseases; fecundity; conservation; allelic lineages; and evolution. Taken together, these articles demonstrate the immense complexity and diversity of the MHC structure and function within and between different vertebrate species.
Download or read book The Autoimmune Diseases written by M. Eric Gershwin and published by Academic Press. This book was released on 2013-12-03 with total page 1302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since publication of the 4th Edition of The Autoimmune Diseases in 2006, the understanding of the immune mechanisms underlying autoimmunity and autoimmune disease has significantly deepened and broadened. This fully revised 5th Edition incorporates new material and combines common themes underlying inductive and effector mechanisms and therapies that relate generally to the autoimmune disorders. It discusses the biological basis of disease at genetic, molecular, cellular, and epidemiologic levels and includes expanded coverage of autoinflammatory disease and autoimmune responses to tumors. Gives a thorough and an important overview on the entire field, framing individual disease chapters with information that compares and contrasts each disorder and therapy Provides thorough, up-to-date information on specific diseases, along with clinical applications, in an easily found reference for clinicians and researchers interested in certain diseases Keeps readers abreast of current trends and emerging areas in the field Ensures that content is not only up-to-date, but applicable and relevant
Download or read book Modulation of the immune system by bacteria from evasion to therapy written by Marina De Bernard and published by Frontiers Media SA. This book was released on 2023-04-10 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biophysics of Infection written by Mark C. Leake and published by Springer. This book was released on 2016-05-18 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes modern biophysical techniques that enable us to understand and examine dynamic processes of infection at the molecular level. Cutting-edge research articles, laboratory protocols, case studies and up-to-date reviews cover topics such as single-molecule observation of DNA replication repair pathways in E. coli; evolution of drug resistance in bacteria; restriction enzymes as barriers to horizontal gene transfer in Staphylococcus aureus; infectious and bacterial pathogen biofilms; killing infectious pathogens through DNA damage; bacterial surfaces in host-pathogen interactions; bacterial gene regulation by riboswitches; transcription regulation in enterobacterial pathogens; the bacterial flagellar motor; initial surface colonization by bacteria; Salmonella Typhi host restrictions; as well as monitoring proton motive force in bacteria; microbial pathogens using digital holography; mathematical modelling of microbial pathogen motility; neutron reflectivity in studying bacterial membranes; force spectroscopy in studying infection and 4D multi-photon imaging to investigate immune responses. The focus is on the development and application of complex techniques and protocols at the interface of life sciences and physics, which increase the physiological relevance of biophysical investigations.
Download or read book Co signal Molecules in T Cell Activation written by Miyuki Azuma and published by Springer Nature. This book was released on 2019-11-22 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book equips young immunologists and health professionals with a clear understanding of the fundamental concepts and roles of co-signal molecules and in addition presents the latest information on co-stimulation. The first part of the book is devoted to co-signal molecules and the regulation of T cells. Following an initial overview, subsequent chapters examine each co-signal molecule in turn and discuss the mechanisms by which co-signal molecules regulate the different types of T cell. The second part covers various clinical applications, including in autoimmune disease, neurological disorders, transplantation, graft-versus-host disease, and cancer immunotherapy. To date, co-stimulation blockade and co-inhibition blockade have shown beneficial effects and many additional clinical trials targeting co-signal molecules are ongoing. The mechanisms underlying these successful treatments are explained and the future therapeutic potential in the aforementioned diseases is evaluated. Co-signal Molecules in T Cell Activation will be a valuable reference guide to co-stimulation for basic and clinical researchers in the fields of both immunology and pharmaceutical science.
Download or read book Advances in Immunology written by Frederick W. Alt and published by Academic Press. This book was released on 2013-07-22 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Immunology, a long-established and highly respected publication, presents current developments as well as comprehensive reviews in immunology. Articles address the wide range of topics that comprise immunology, including molecular and cellular activation mechanisms, phylogeny and molecular evolution, and clinical modalities. Edited and authored by the foremost scientists in the field, each volume provides up-to-date information and directions for the future. Contributions from leading authorities Informs and updates on all the latest developments in the field
Download or read book Fundamental Concepts in Biophysics written by Thomas Jue and published by Springer Science & Business Media. This book was released on 2009-04-20 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first volume, Fundamental Concepts in Biophysics, the authors lay down a foundation for biophysics study. Rajiv Singh opens the book by pointing to the central importance of “Mathematical Methods in Biophysics”. William Fink follows with a discussion on “Quantum Mechanics Basic to Biophysical Methods”. Together, these two chapters establish some of the principles of mathematical physics underlying many biophysics techniques. Because computer modeling forms an intricate part of biophysics research, Subhadip Raychaudhuri and colleagues introduce the use of computer modeling in “Computational Modeling of Receptor–Ligand Binding and Cellular Signaling Processes”. Yin Yeh and coworkers bring to the reader’s attention the physical basis underlying the common use of fluorescence spectroscopy in biomedical research in their chapter “Fluorescence Spectroscopy”. Electrophysiologists have also applied biophysics techniques in the study of membrane proteins, and Tsung-Yu Chen et al. explore stochastic processes of ion transport in their “Electrophysiological Measurements of Membrane Proteins”. Michael Saxton takes up a key biophysics question about particle distribution and behavior in systems with spatial or temporal inhomogeneity in his chapter “Single–Particle Tracking”. Finally, in “NMR Measurement of Biomolecule Diffusion”, Thomas Jue explains how magnetic resonance techniques can map biomolecule diffusion in the cell to a theory of respiratory control. This book thus launches the Handbook of Modern Biophysics series and sets up for the reader some of the fundamental concepts underpinning the biophysics issues to be presented in future volumes.
