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This book adds to a intensively investigated question of immunological research. How do regulatory T cells mediate their function to ensure tolerance against self-antigen? The author analyzes the interaction via the cytokine interleukin 2 between T helper cells, which mediate immune responses, and regulatory T cells. Since both cell types depend on interleukin 2 to mediate their functions, competition for interleukin 2 is likely. A mathematical model is developed to describe the interaction. This model focuses on the interleukin 2 receptor dynamics on helper and regulatory T cells and the extracellular interleukin 2 diffusion. The interleukin 2 receptor dynamics is governed mainly by an autocrine positive feedback loop on both cell types. However, its differential regulation results in a switch-like up-regulation of the receptors on T helper cells and a gradual adaptation of the receptor levels to extracellular interleukin 2 supply on regulatory T cells. This difference enables regulatory T cells to efficiently compete for interleukin 2 and deprive T helper cells of their growth factor. Cell culture experiments verify these findings. It can be shown that the antigen stimulus and the intercellular distance are relevant control parameters for competition. Other mechanisms are described for suppression of T helper cell action by regulatory T cells; competition for interleukin 2 may act in concert with them.
T cells play a vital role mediating adaptive immunity, a specific acquired resistance to an infectious agent produced by the introduction of an antigen. There are a variety of T cell types with different functions. They are called T cells, because they are derived from the thymus gland. This volume discusses how T cells are regulated through the operation of signaling mechanisms. Topics covered include positive and negative selection, early events in T cell receptor engagement, and various T cell subsets.
Whole new areas of immunological research are emerging from the analysis of experimental data, going beyond statistics and parameter estimation into what an applied mathematician would recognise as modelling of dynamical systems. Stochastic methods are increasingly important, because stochastic models are closer to the Brownian reality of the cellular and sub-cellular world.
The book Research Methodology for Sport and Exercise Science is a comprehensive introduction to study and research. Besides an extensive introduction a research-logic program research is methodology presented in six parts: (I) Philosophical Foundations of Science and Research / (II) Research Methods / (III) Research Designs / (IV) Techniques of Data Collection / (V) Techniques of Data Analysis / (VI) Transfer from Research Results (Theory) to Practice. Thus a basic text-book is presented for students of sport and exercise as well as allied sciences, in order to get acquainted with the philosophy of sport science in general and research methodology in specific
Provides a core knowledgebase for those with minimal exposure to hematologic molecular biology, fully revised and updated Molecular Hematology brings together the most up-to-date and reliable information on the molecular basis of major hematologic diseases. Edited and authored by leading experts in the field, this volume demonstrates the clinical relevance of molecular biology in the diagnosis and treatment of blood disorders. Concise, accessible chapters address key topics in modern hematology, such as lymphoma genetics, molecular coagulation, thrombophilia, pharmacogenomics, platelet disorders, hemophilia, anemia, and multiple myeloma. Chapters introduce and summarize specific hematologic diseases, explore the pathogenesis of the disorder, highlight new and emerging molecular strategies, and more. Now in its fifth edition, Molecular Hematology is fully revised to incorporate contemporary hematology research and practice. Entirely new chapters cover topics such as CAR-T cell technology, COVID, cancer cell biology, gene therapy and gene editing in clinical practice, as well as the impact of molecular research on the diagnosis and treatment of various malignant hematologic diseases. This edition includes updated suggested readings and a wealth of new full-color charts, graphs, and illustrations throughout. Covers the molecular biology of different blood diseases, their pathogeneses, and current molecular research and therapies Illustrates the impact of molecular research on hematologic investigations and therapeutics Discusses how progress in basic science and therapeutics has improved the diagnosis and care of patients with various hematologic disorders Surveys recent developments in cancer-cell biology, with an emphasis on leukemia and lymphoma Includes access to a companion Digital Edition providing search across the book, downloadable illustrations, and notation tools Molecular Hematology is a must-have resource for established and trainee clinicians, clinical scientists and researchers, medical students, and upper-level undergraduates in the fields of hematology, oncology, and molecular biology.
Persistent Viral Infections Edited by Rafi Ahmed Emory Vaccine Center, Atlanta, USA and Irvin S. Y. Chen UCLA School of Medicine, Los Angeles, USA During the past decade much of our attention has focused on diseases associated with viral persistence. Major breakthroughs in immunology, and the advent of molecular approaches to study pathogenesis have increased our understanding of the complex virus-host interactions that occur during viral persistence. Persistent Viral Infections focuses on: * The pathogenesis and immunology of chronic infections * Animal models that provide, or have the potential to provide, major insights This volume will be essential reading for virologists, immunologists, oncologists and neurologists.
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.
The sirtuin family of proteins (SIRT1-7) received a lot of attention in recent years as they serve as metabolic sensors that control not only metabolism, but also aging and lifespan regulation. As such, sirtuins are strong targets for the treatment of age-related metabolic diseases, including obesity, diabetes, and cancer. Indeed, many research groups as well as pharmaceutical companies discovered food components and/or drugs that target the sirtuins and provide significant health benefits. This book focuses on various aspects of sirtuin biology, from basic biochemistry, via molecular function, to its role in (fighting) human disease.
Providing an overview of recent developments in the field of signal transduction, this volume emphasizes direct clinical significance. As such, topics like nuclear receptors, apoptosis, growth factors, cell cycles and cancer are examined.
This book offers a detailed review of the remarkable advances that have been made in research on the pathogenesis of a number of neuroimmunological diseases, as well as outlining novel treatments including the use of monoclonal antibodies. Written by renowned experts who have made major contributions in the field, such as identifying neuromyelitis optica as an immunopathological clinical condition, identifying the role of ganglioside and ganglioside-complex antibodies in Guillain-Barré syndrome, and developing a novel treatment for POEMS (polyneuropathy, organomegaly, endocrinopathy, M-protein, and skin changes) syndrome, the book summarizes recent advances in basic and clinical research. Neuroimmunological Diseases is a useful resource for not only researchers but also neurologists who are engaged in the management of neuroimmunological diseases.