Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Tolerogenic Dendritic Cells And Regulatory T Cells As Therapeutics For Immune Mediated Disorders
Download Tolerogenic Dendritic Cells And Regulatory T Cells As Therapeutics For Immune Mediated Disorders full books in PDF, epub, and Kindle. Read online Tolerogenic Dendritic Cells And Regulatory T Cells As Therapeutics For Immune Mediated Disorders ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Tolerogenic Dendritic Cells and Regulatory T Cells as Therapeutics for Immune-Mediated Disorders by : Djordje Miljkovic
Download or read book Tolerogenic Dendritic Cells and Regulatory T Cells as Therapeutics for Immune-Mediated Disorders written by Djordje Miljkovic and published by Frontiers Media SA. This book was released on 2021-11-16 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emerging Therapeutics for Immune Tolerance by : Hyewon Phee
Download or read book Emerging Therapeutics for Immune Tolerance written by Hyewon Phee and published by Frontiers Media SA. This book was released on 2021-11-30 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Mechanisms of Dendritic Cell-Mediated Immune Tolerance and Autoimmunity by : Fang Zhou
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.
Book Synopsis Regulatory T Cells in Inflammation by : Leonie S. Taams
Download or read book Regulatory T Cells in Inflammation written by Leonie S. Taams and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regulatory T-cells are essential components of the immune system, and several different subsets of regulatory T-cells have been described. Considerable regulatory function has been attributed to the CD4+CD25+ T-cell subset. These cells act by suppressing adaptive and possibly innate immune responses thereby maintaining or restoring the balance between immunity and tolerance. The suppressive effects of CD4+CD25+ regulatory T-cells are cell-contact dependent. Recent developments and viewpoints in the field of CD4+CD25+ regulatory T-cells as well as the potential use of regulatory T-cells in immunotherapy of inflammatory diseases are discussed in this volume. By linking data from experimental models with recent findings from the clinic, this book will be of interest to immunologists and other biomedical researchers as well as clinicians interested in the regulation and manipulation of the immune response during inflammatory disease.
Book Synopsis TLR-4 Agonism Induces CD25+ MHCIIhigh Dendritic Cells in Association with Tolerogenic Antigen Recognition by : Alexander Gevelinger Bastian
Download or read book TLR-4 Agonism Induces CD25+ MHCIIhigh Dendritic Cells in Association with Tolerogenic Antigen Recognition written by Alexander Gevelinger Bastian and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autoimmune disease is a result of the breakdown in immunological self-tolerance leading to destruction of self-tissues mediated by the aberrant immune attack. In Multiple Sclerosis (MS), CD4+ T cells mediate destruction of myelin in the central nervous system (CNS) leading to debilitating symptoms in afflicted individuals. MS is the leading cause of non-injury disability in young adults, impacting nearly 1 million people in the United States alone. As is the case for many autoimmune diseases, there is no cure for MS, highlighting the urgent need for new therapeutic platforms. A therapeutic approach to reestablish self-tolerance is likely to be more effective and have less side effects than current treatments, highlighting the importance for developing such an approach. At the center of this approach lies CD4+ FOXP3+regulatory T cells (Tregs), which are a subset of T cells that suppress the immune system and play an integral role in controlling autoimmunity. Therapies aimed at increasing Tregs, especially in a disease targeted manner, have the potential to reestablish self-tolerance and cure autoimmunity.All T cells, including Tregs, must recognize antigen on antigen presenting cells (APCs) to perform effector functions. Therefore, targeting an APC niche that supports the development of Tregs is an effective approach for development of autoimmune therapeutics. Dendritic cells (DCs) are a class of APCs known to support Treg development and function. In this study, we show that agonism of Toll-like receptor 4 (TLR-4) with lipopolysaccharide (LPS) or monophosphoryl Lipid A (MPLA) on DCs leads to a CD25+ MHCIIhigh DC phenotype. We show that the expression of CD25 is unique to DCs and that it binds IL-2 from the environment without detectable downstream signaling. Importantly, we show that this bound IL-2 can be utilized by responder T cells, highlighting a potential function of CD25 on DCs. We then combined TLR-4 agonism with our lab's DC-targeting tolerogenic vaccine, GMCSF-MOG, which we have previously shown leads to high levels of Tregs and amelioration of experimental autoimmune encephalomyelitis (EAE) in mice. When GMCSF-MOG is combined with MPLA, Treg levels are increased and extend out to 78 days post injection. The enhanced and extended Treg levels observed when MPLA is included in the vaccine likely play a role in accelerating the GMCSF-MOG-mediated amelioration of EAE and preventing observed EAE relapse. At the crux of DC-mediated tolerance induction is the efficiency of the antigen recognition event. Lower affinity TCR ligation supports tolerance through lower induction of costimulatory molecules (CD40L) and increased induction of inhibitory molecules (PD-1). Furthermore, inhibiting the CD40L/CD40 axis increases Treg induction. Overall, we show that TLR-4 agonism leads to CD25+ MHCIIhigh DCs and functions as a tolerogenic adjuvant when combined with the DC targeting GMSCF-MOG vaccine through support of low-efficiency Treg-favorable antigen recognition events.
Book Synopsis Dendritic Cell Control of Immune Responses by : Penelope Anne Morel
Download or read book Dendritic Cell Control of Immune Responses written by Penelope Anne Morel and published by Frontiers Media SA. This book was released on 2016-07-27 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dendritic cells (DC) are among the first cells to encounter pathogens and damage in peripheral tissues and, upon activation, DC migrate to lymph nodes where they activate and educate T cells to initiate and shape the immune response. DC present pathogen-derived antigen to T cells and drive T cell differentiation into particular effector cells through the expression and secretion of co-stimulatory molecules and cytokines respectively. The study of DC biology has included the identification of multiple DC subsets in tissues and lymphoid organs, the differentiation and plasticity of DC subsets, the functional consequences of DC interaction with pathogen, control of DC migratory properties and the impact of DC on T cell activation and differentiation. In recent years sophisticated systems biology approaches have been developed to deepen our understanding of DC function. These studies have identified differences between DC subsets located in various tissues and critical factors that drive the outcome of the interaction between DC and T cells. DC are currently being used in in various clinical therapeutic settings, including as vaccines for cancer and autoimmune disease. A clear understanding of DC factors that contribute to specific immune responses is vital to the success of DC based therapies. This research topic will give a comprehensive overview of current issues in DC biology and provides an update on the clinical uses of DC in the therapy of autoimmunity and cancer.
Book Synopsis The nature of activatory and tolerogenic dendritic cell-derived signal 2 by : Francesca Granucci
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.
Book Synopsis Tolerogenic Antigen-Presenting Cells – Modulating Unwanted Immune Response at Their Core by : John Isaacs
Download or read book Tolerogenic Antigen-Presenting Cells – Modulating Unwanted Immune Response at Their Core written by John Isaacs and published by Frontiers Media SA. This book was released on 2019-12-27 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gene Therapy of Autoimmune Disease by : Gerald J. Prud'homme
Download or read book Gene Therapy of Autoimmune Disease written by Gerald J. Prud'homme and published by Springer. This book was released on 2005-07-13 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autoimmune diseases are diverse and responsible for considerable morbidity. Their etiology remains largely unknown, and current therapy with anti-inflammatory drugs is prone to adverse effects, and rarely curative. New therapies with anti-cytokine antibodies or receptors are promising, but require frequent administration of expensive protein drugs. Gene Therapy of Autoimmune Diseases comprehensively reviews research in gene therapy for autoimmune diseases with viral or non-viral vectors. Gene therapy offers the possibility of long-term, continuous delivery of a wide variety of immunosuppressive, anti-inflammatory, or tolerance-inducing agents. Moreover, highly specific genetically modified cells can be produced. This book discusses the most promising avenues in this exciting new field.
Book Synopsis Systemic Autoimmunity by : P. E. Bigazzi
Download or read book Systemic Autoimmunity written by P. E. Bigazzi and published by CRC Press. This book was released on 1991-08-30 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surveys the biotechnologically influenced advances in the understanding of systemic autoimmune disorders, highlighting recent research using cell biology and biochemistry, the cloning of immune cells, recombinant DNA, and molecular genetics. Among the topics are the role of complement in inflammatio
Book Synopsis Induction of immune tolerance: Addressing unmet medical need in immune mediated diseases and immune responses to biologics by : Amy Rosenberg
Download or read book Induction of immune tolerance: Addressing unmet medical need in immune mediated diseases and immune responses to biologics written by Amy Rosenberg and published by Frontiers Media SA. This book was released on 2023-09-25 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lymphocyte Updates by : Gheorghita Isvoranu
Download or read book Lymphocyte Updates written by Gheorghita Isvoranu and published by BoD – Books on Demand. This book was released on 2017-07-12 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a synergic effort of an international team of specialists in immunology to expand the scientific achievements in the field of lymphocytes. It offers important and specific updated information to researchers, students, teachers, and medical professionals. Moreover, considering the remarkable dynamics of immunology and immunotherapy, this book "Lymphocyte Updates - Cancer, Autoimmunity, and Infection" aims to represent a significant source of concise scientific data and advancement of knowledge in this field. The chapters offer new insights into the latest scientific progress on lymphocyte roles in protective immunity, as well as their involvement in pathogenesis of various disorders.
Book Synopsis Particle Mediated Co-delivery of IL-10 and Antigen Inhibits T Cell Activation But Fails to Induce Tolerance by : P. M. J. Kaye
Download or read book Particle Mediated Co-delivery of IL-10 and Antigen Inhibits T Cell Activation But Fails to Induce Tolerance written by P. M. J. Kaye and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Immune disorders such as allergy and autoimmunity are becoming increasingly common in developed countries. Self-reactive T cells exist in both healthy and autoimmune individuals. It is generally understood that hyperimmune disorders are caused by insufficient regulation, namely loss of activity of regulatory T cells. Whilst regulatory T cells exist naturally it is also possible to induce them both in vitro and in vivo. Immunotherapeutic techniques aim to provide noninflammatory exposure of antigen to the immune system with the aim of inducing antigen-specific regulatory T cells. Interleukin-10 (IL-10) is a cytokine with well known immunosuppressive qualities. It inhibits both the migration and the antigen-presenting ability of dendritic cells. It also has direct effects on T cells. Indeed, IL-10-secreting TR1 regulatory T cells were identified almost 15 years ago; their in vitro generation being dependent on exposure to IL-10. Particle-mediated DNA delivery (PMDD) is a promising method of immunisation and is especially suited to vaccines intended to have greater control over the response they induce. One of the main reasons for this is the possibility of including genes encoding immunomodulatory molecules alongside the antigen gene. This study utilises a mouse model involving the adoptive transfer of TCR-transgenic CD4+ T cells and establishes the response of these cells to PMDD immunisation. The model was then used to examine the effect of coadministration of the IL-10 gene. Its inclusion in the vaccine suppressed the response to antigen. This effect was maximal when the IL-10 gene was expressed in the same cell as the antigen gene. Using sequential immunisations the model was extended in order to study long-term effects, namely tolerance and the induction of regulatory T cells. Finally a mouse model of allergic asthma was used to examine any tolerogenic/therapeutic effects of the antigen-IL-10 vaccine. No significant longterm tolerance to antigen was identified. These results demonstrate that whilst the presence of IL-10 clearly inhibits the T cell response to antigen it does not necessarily confer tolerogenic properties on these cells. This brings into question whether IL-10 in the periphery, supplied, for example, by TR1 cells, generates fresh regulatory T cells or merely inhibits the response to a particular antigenic challenge.
Book Synopsis Dendritic Cells by : Giovanna Lombardi
Download or read book Dendritic Cells written by Giovanna Lombardi and published by Springer Science & Business Media. This book was released on 2008-11-24 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding of the role of dendritic cells (DCs) in immune responses has come a long way since Steinmann and colleagues described these cells in 1972. - tensive research during the intervening period has provided a good understanding of the complexity of the DC system and its pivotal role in immunity. It is also now clearer how different subsets of DCs interact and regulate each other and how DC populations affect the function of other cells of the immune system. The improved understanding of their role in immune response has led to the idea that modulation of DC functions by, for example, pharmacological agents could be used as a pot- tial therapeutic approach in some pathological conditions. The actual applicability and therapeutic potential of all these approaches is yet to be fully demonstrated but nonetheless, animal models of human diseases are proving to be very helpful in the evaluation of manipulated DCs as a new treatment in diseases like cancer, auto- munity or asthma. DCs are integral to the initiation and regulation of immune response (Banchereau et al. 2000). The outcome of antigen presentation by DCs is determined by their maturation status, which can be induced by their interaction with danger signals. To recognise a wide array of pathogen-associated molecular patterns (PAMP), DCs express a number of pattern recognition receptors (PRR) such as Toll-like rec- tors (TLRs) and C-type lectin receptors (CLR) that recognise structural components of pathogens and discriminate between self and non-self molecules.
Book Synopsis Immune Regulation by : Marc Feldmann
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.
Book Synopsis CD4+CD25+ Regulatory T Cells: Origin, Function and Therapeutic Potential by : B. Kyewski
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.
Book Synopsis Epidermal Langerhans Cells by : Gerold Schuler
Download or read book Epidermal Langerhans Cells written by Gerold Schuler and published by CRC Press. This book was released on 1990-12-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Epidermal Langerhans Cells focuses on epidermal Langerhans cells (LCs) and the important role they play in the induction of contact hypersensitivity and graft rejection. This in-depth work discusses how these antigen-presenting cells are modulated by various physicochemical agents (such as UV light) and how they can be infected by the AIDS virus. It also reveals that cytokines mediate their development into potent T cell-stimulatory dendritic cells. This comprehensive review covers important experimental details and methods, and fascinating information on LCs. It also provides an overview of the immune system as it relates to the skin in health and disease. This up-to-date publication is an indispensable resource for all investigative and clinical dermatologists, as well as immunologists interested in antigen-presenting cells.
