Download or read book Molecular Mechanisms of Dendritic Cell Mediated Immune Tolerance and Autoimmunity written by Fang Zhou and published by Frontiers Media SA. This book was released on 2024-04-09 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dendritic cells (DCs) play a critical role in immune system, as they are necessary both for innate and adaptive immunity. According to their function, dendritic cells can be classified in immune tolerogenic or inflammatory DCs. DCs have been shown to regulate T cell-mediated immune responses and lead to immune tolerance and autoimmunity. For example, immune-tolerogenic DCs facilitate the development of regulatory T cells and inhibit T helper 17-mediated autoimmunity in mice with experimental autoimmune encephalomyelitis. Moreover, inflammatory DCs activate CD8+ and CD4+ T cells and elicit T cell-mediated inflammatory immune responses in vivo. However, the molecular and cellular mechanisms underlying DC-mediated immune tolerance and autoimmunity are still obscure.
Download or read book The Molecular Mechanisms of Regulatory T cell Immunosuppression written by Kendall A. Smith and published by Frontiers E-books. This book was released on with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since Regulatory T cells (T-Regs) were first defined as peripheral CD4+ T cells that express the interleukin-2 (IL-2) receptor alpha chain (IL-2Ra), there have been intensive efforts to determine the molecular mechanisms whereby this minor subset of CD4+ T cells (~ 5-10%) nonspecifically suppresses all potential effector T cells, whether reactive to self or non-self antigens. Multiple possible molecular mechanisms have been implicated, including the scavenging of IL-2 via the expression of high densities of IL-2Rs, the inhibition of antigen presentation via CTLA-4 molecules leading to decreased IL-2 production, the activation of intracellular cAMP thereby suppressing both IL-2 production and action, and the production of suppressive cytokines such as IL-10 and Tumor Growth Factor-beta, to list a few. However, the field has thus far failed to come to a consensus, such that some investigators have now asserted that many molecular mechanisms may be operative, in fact that perhaps all of the described mechanisms may account for the suppressive effects of these cells, acting either simultaneously or sequentially. Thus, this Research Topic is focused on articles that can shed some new light on the molecular mechanisms responsible for T-Reg immunosuppression.
Download or read book The nature of activatory and tolerogenic dendritic cell derived signal 2 written by Francesca Granucci and published by Frontiers E-books. This book was released on 2014-07-08 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most interesting issues in immunology is how the innate and adaptive branches of the immune system cooperate in vertebrate organisms to respond and destroy invading microorganisms without destroying self-tissues. More than 20 years ago, Charles Janeway proposed the innate immune recognition theory [1]. He hypothesized the existence of innate receptors (Pattern recognition receptors, PRRs) that, by recognizing molecular structures associated to pathogens (PAMPs) and being expressed by antigen presenting cells (APCs) and epithelial cells, could alert the immune system to the presence of a pathogen, making it possible to mount an immediate inflammatory response. Moreover, by transducing the alert signal in professional APCs and inducing the expression of costimulatory molecules, these receptors could control the activation of lymphocytes bearing clonal antigen-specific receptors, thereby promoting appropriate adaptive immune responses. Since adaptive immunity can be activated also following sterile inflammatory conditions, it was subsequently proposed by Polly Matzinger that the innate immune system could be also activated by endogenous danger signals, generically called danger associated molecular patterns (DAMPs)[2]. The first prediction has been amply confirmed by the discovery of Toll-like receptors [3; 4; 5] and cytoplasmic PRRs such as RIG-like receptors [6]. Other PRR families such as the NOD-like receptors and C-type lectins exert immunogenic or tolerogenic signals [7; 8; 9] and may recognize not strictly pathogens but also endogenous danger signals that may lead to inflammasome activation [10; 11] . Dendritic cells (DCs) have been identified as the cells of the innate immune system that, by sensing PAMPs or DAMPs transduce signals to the nucleus. This leads to a transcriptional reprogramming of DCs with the consequent expression of three signals, namely signal 1 (MHC+peptide), signal 2 (surface costimulatory molecules) and signal 3 (cytokines) necessary for the priming of antigen-specific naïve T cell responses (signal 1 and 2) and T cell polarization (signal 3). The reason why DCs are superior with respect to other professional APCs in naïve T cell activation has not been unequivocally defined but in vivo may mainly result from their migration capacity to secondary lymphoid organs. It has not been established whether DCs can provide a special “signal 2” or simply very high levels, compared with other APCs, of commonly expressed signals 1 and 2, so that a naïve T cell could reach the threshold of activation. A second aspect of DC biology needs also to be taken into account. Concerning the question of how self-tissues are not destroyed following the initiation of adaptive immune responses, different mechanisms of central and peripheral auto-reactive T cell tolerization have been proposed [12]. In particular, it has been defined that high affinity T cells are deleted in the thymus, while low affinity auto-reactive T cells or T cells specific for tissue-sequestered antigens that do not have access to the thymus are controlled in the periphery. In a simplified vision of how peripheral T cell tolerance could be induced and maintained, it was thought that, in resting conditions, immature DCs, expressing low levels of signal 1 and low or no levels of signal 2, were able to induce T cell unresponsiveness. Nevertheless, it is now clear that a fundamental contribution to the peripheral tolerance is due to the conversion of naïve T cells into peripheral regulatory T cells (pTreg cells) and it is also clear that DCs need to receive a specific conditioning to become able to induce pTreg cell differentiation. Even more intriguing is that also DCs activated through PRRs, with particular Toll like receptor (TLR) agonists, are capable of generating pTreg cell conversion if these agonists induce the production of the appropriate cytokines.
Download or read book Mechanisms of Lymphocyte Activation and Immune Regulation VIII written by Sudhir Gupta and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in biochemistry, cell biology, genome-wide mutagenesis - coupled with molecular technology, including gene microarray and transgenic and knock-out animals - have been instrumental in understanding the cellular processes and molecular pathways of self-tolerance and autoimmune diseases. The molecular definition of these pathways and processes has led to novel treatments for certain auto-immune diseases that are based on the pathogenesis of diseases rather than on broad-spectrum immunosuppression. This book reviews many of these current developments and proposes future novel approaches for understanding the pathogenesis of auto-immune diseases and designing novel therapy. This book covers three major areas of auto-immunity: the basic mechanisms of immunological tolerance, pathogenesis of auto-immune diseases, and some novel therapies. This book should be useful for immunologists, molecular biologists, rheumatologists, and clinical scientists.
Download or read book An Interplay of Cellular and Molecular Components of Immunology written by Indrakant Kumar Singh and published by CRC Press. This book was released on 2022-12-19 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our immune system defends us against infection by employing multiple lines of defense. The relevance of the immune response in human health, disease prevention, and vaccinations becomes evident when the immune system is compromised as in the case of pathogenic infections or autoimmune diseases. The reader will gain a fundamental understanding of the essential principles of immunology, such as how our immune system recognizes/fights infectious agents, how our body differentiates between foreign and self-cells/molecules, and how the memory from previous infections aids in a faster and more effective immune response. The book is divided into 17 chapters, providing an overview of the immune system and its components, including its organs and cells. Chapters on the major histocompatibility complex, the complement system, hypersensitivity and tolerance, antibody diversity through DNA rearrangements, and autoimmune diseases are included in the book which further broadens the understanding of this very complex system of our body. Chapters on transplantation immunology and vaccines provide a perspective on the application of these immunological concepts and will be of great interest to readers. Key features of the book: Simple, direct, and lucid language Comprehensive coverage of concepts for better understanding Well-labeled illustrations, flowcharts, and tables for enhanced learning Every chapter is followed up with a detailed summary and questionnaire A detailed glossary for users to know the right words Chapters contributed/reviewed by experienced experts in this field The book provides broad, accessible, and up-to-date information about immunological perspectives to biotechnologists, biomedical scientists, biochemists, molecular biologists, and students from various streams of life sciences, including zoology, biotechnology, and microbiology, as well as instant access to a wealth of information.
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 Tertiary Lymphoid Organs TLOs Powerhouses of Disease Immunity written by Changjun Yin and published by Frontiers Media SA. This book was released on 2017-05-22 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The immune system employs TLOs to elicit highly localized and forceful responses to unresolvable peripheral tissue inflammation. Current data indicate that TLOs are protective but they may also lead to collateral tissue injury and serve as nesting places to generate autoreactive lymphocytes. A better comprehension of these powerhouses of disease immunity will likely facilitate development to unprecedented and specific therapies to fight chronic inflammatory diseases.
Download or read book The Molecular Mechanisms of Chronic Inflammation Development written by Masaaki Murakami and published by Frontiers E-books. This book was released on with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inflammation is critical for the development of many complex diseases and disorders including autoimmune diseases, metabolic syndrome, neurodegenerative diseases, cancers, and cardiovascular diseases. Inflammation comes as two types: chronic inflammation, which can be defined as a dysregulated form of inflammation, and acute inflammation, which can defined as a regulated form. Because of its special role in the aforementioned diseases, establishing methods to control chronic inflammation is important for developing cures and treatments. One challenge for this purpose has been the ability to distinguish chronic and acute inflammation based on molecular biology diagnostics. Thus, this Research Topic is focused on articles that can shed some new light on the molecular mechanisms responsible for the development of chronic inflammation and its related conditions.
Download or read book The Cytokines of the Immune System written by Zlatko Dembic and published by Academic Press. This book was released on 2015-05-23 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cytokines of the Immune System catalogs cytokines and links them to physiology and pathology, providing a welcome and hugely timely tool for scientists in all related fields. In cataloguing cytokines, it lists their potential for therapeutic use, links them to disease treatments needing further research and development, and shows their utility for learning about the immune system. This book offers a new approach in the study of cytokines by combining detailed guidebook-style cytokine description, disease linking, and presentation of immunologic roles. Supplies new ideas for basic and clinical research Provides cytokine descriptions in a guidebook-style, cataloging the origins, structures, functions, receptors, disease-linkage, and therapeutic potentials Offers a textbook-style view on the immune system with the immunologic role of each cytokine
Download or read book Innate Immunity in Health and Disease written by Shailendra K. Saxena and published by BoD – Books on Demand. This book was released on 2021-08-25 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on various aspects and properties of innate immunity, whose deep understanding is integral for safeguarding the human race from further loss of resources and economies due to innate immune response-mediated diseases. Throughout this book, we examine the individual mechanisms by which the innate immune response acts to protect the host from pathogenic infectious agents and other non-communicable diseases. Written by experts in the field, the volume discusses the significance of macrophages in infectious disease, tumor metabolism, and muscular disorders. Chapters cover such topics as the fate of differentiated macrophages and the molecular pathways that are important for the pathologic role of macrophages.
Download or read book Janeway s Immunobiology written by Kenneth Murphy and published by Garland Science. This book was released on 2010-06-22 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Janeway's Immunobiology CD-ROM, Immunobiology Interactive, is included with each book, and can be purchased separately. It contains animations and videos with voiceover narration, as well as the figures from the text for presentation purposes.
Download or read book Immune Regulation written by Marc Feldmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leukocyte culture conferences have a long pedigree. This volume records some of the scientific highlights of the 16th such annual con ference, and is a witness to the continuing evolution and popularity of leukocyte culture and of immunology. There is strong evidence of the widening horizons of immunology, both technically, with the obviously major impact of molecular biology into our understanding of cellular processes, and also conceptually. Traditionally, the 'proceedings' of these conferences have been published. But have the books produced really recorded the major part of the conference, the informal, friendly, but intense and some times heated exchanges that take place between workers in tackling very similar problems and systems and which are at the heart of every successful conference? Unfortunately this essence cannot be incorpo rated by soliciting manuscripts. For this reason, we have changed the format of publication, retaining published versions of the symposium papers, but requesting the workshop chairmen to produce a summary of the major new observations and areas of controversy highlighted in their sessions, as a vehicle for defining current areas of interest and debate. Not an easy task, as the workshop topics were culled from the abstracts submitted by the participants, rather than being on predefined topics. The unseasonal warmth in Cambridge was reflected in the atmos phere of the conference, the organization of which benefited from the administrative skills of Jean Bacon, Philippa Wells, Mr. Peter Irving, and Mrs.
Download or read book Military Strategies for Sustainment of Nutrition and Immune Function in the Field written by Institute of Medicine and published by National Academies Press. This book was released on 1999-05-13 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every aspect of immune function and host defense is dependent upon a proper supply and balance of nutrients. Severe malnutrition can cause significant alteration in immune response, but even subclinical deficits may be associated with an impaired immune response, and an increased risk of infection. Infectious diseases have accounted for more off-duty days during major wars than combat wounds or nonbattle injuries. Combined stressors may reduce the normal ability of soldiers to resist pathogens, increase their susceptibility to biological warfare agents, and reduce the effectiveness of vaccines intended to protect them. There is also a concern with the inappropriate use of dietary supplements. This book, one of a series, examines the impact of various types of stressors and the role of specific dietary nutrients in maintaining immune function of military personnel in the field. It reviews the impact of compromised nutrition status on immune function; the interaction of health, exercise, and stress (both physical and psychological) in immune function; and the role of nutritional supplements and newer biotechnology methods reported to enhance immune function. The first part of the book contains the committee's workshop summary and evaluation of ongoing research by Army scientists on immune status in special forces troops, responses to the Army's questions, conclusions, and recommendations. The rest of the book contains papers contributed by workshop speakers, grouped under such broad topics as an introduction to what is known about immune function, the assessment of immune function, the effect of nutrition, and the relation between the many and varied stresses encountered by military personnel and their effect on health.
Download or read book CD4 CD25 Regulatory T Cells Origin Function and Therapeutic Potential written by B. Kyewski and published by Springer Science & Business Media. This book was released on 2006-01-09 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vertebrate immune system defends the organism against invading pathogens while at the same time being self-tolerant to the body’s own constituents thus preserving its integrity. Multiple mechanisms work in concert to ensure self-tolerance. Apart from purging the T cell repertoire from auto-reactive T cells via negative selection in the thymus dominant tolerance exerted by regulatory T cells plays a major role in tolerance imposition and maintenance. Among the various regulatory/suppressive cells hitherto described, CD4+CD25+ regulatory T cells (Treg) and interleukin-10 producing T regulatory 1 (Tr1) cells have been studied in most detail and are the subject of most articles in this issue. Treg, also called "natural" regulatory T cells, will be traced from their intra-thymic origin to the site of their action in peripheral lymphoid organs and tissues. The repertoire of Treg is clearly biased towards recognition of self-antigens, thereby potentially preventing autoimmune diseases such as gastritis and oophoritis. Regulatory T cells, however also control infections, allergies and tolerance to transplanted tissues and this requires their induction in the periphery under conditions which are not yet fully understood. The concept of dominant tolerance, by far not novel, will offer new insights and hopefully tools for the successful treatment of autoimmune diseases, improved cancer immunotherapy and transplant survival. The fulfillment of these high expectations will, however, require their unambiguous identification and a better understanding of their mode of action.
Download or read book Immune Response and the Eye written by J. Wayne Streilein and published by Karger Medical and Scientific Publishers. This book was released on 1999-01-01 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the physiologic bases of ocular immune privilege and the distinctive systemic immune responses elicited by eye derived antigens are described. Several chapters discuss the pathogeneses of these disorders which arise from infections, autoimmunity, and neoplasms. Finally, chapters devoted to corneal and retinal transplantation describe attempts to exploit ocular immune privilege to promote graft survival and thereby cure blindness. Ophthalmologists, both clinicians and physician scientists, general and tumor immunologists, transplantation biologists and anyone seeking to understand the immunopathogenic diseases that threaten vision will appreciate the information presented in this book.
Download or read book Autoimmune Liver Disease written by James Neuberger and published by John Wiley & Sons. This book was released on 2020-04-13 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical guide to autoimmune liver diseases through pathogenesis, diagnosis, and management In Autoimmune Liver Disease Management and Clinical Practice, practitioners will learn about the current state of autoimmune liver disease and how to focus on their diagnosis and treatment. The four-part book begins with a thorough investigation of current immunological thinking as it relates to the autoimmunity of the liver. It also covers the four major hepatic autoimmune liver diseases in both adults and children, their management and the role of liver transplantation, and learned approaches to patient management and empowerment. Expert authors in the field have come together to provide a thorough examination of autoimmune liver disease to help support clinicians assisting patients. The text provides an in-depth look at topics including: ● The four major hepatic autoimmune liver diseases, their diagnosis, and potential disease management ● The use (and misuse) of autoantibodies in diagnosis and treatment ● The role and timing of liver transplantation and the impact of recurrent autoimmune liver disease as well as de novo autoimmune hepatitis ● Optimal approaches to managing patients and keeping care personalised With breadth, depth and current-day relevance, Autoimmune Liver Disease sheds light on recent developments in management of liver disease for practitioners, nurses, and health care professionals.
Download or read book Idiotypes in Medicine Autoimmunity Infection and Cancer written by R.C. Kennedy and published by Elsevier. This book was released on 1997-11-19 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the most comprehensive review of the idiotypic network available. All the current knowledge of idiotypes of the various antibodies is incorporated in this volume. The pathogenic role of idiotypes in autoimmunity and cancer is reviewed in depth. The therapeutic part focusses on harnessing anti-idiotypes for treating autoimmunological disorders, and on the employment of idiotypes for vaccines in cancer and infectious diseases, as well as explaining the manipulation of the idiotypic network in autoimmunity and cancer idiotypes and vaccines.
