Beneficial And Pathological Roles Of Myeloid Cells During Covid 19

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.

Immunoregulation is one of the areas which has witnessed the most explosive advances of immunology during the past decade. It is in this area that the current view of the immune system has arisen and developed. There is indeed little doubt that immune reactions are primarily determined by messages which are genera ted within the immune system and passed among different types of immunologie cells. This cell communication not only determines the type, intensity and duration of the response after perturbation of the immune system by exogenous antigens, but it is also essential for preventing autoimmune reactions and their clinical conse quences. In order to assure aperfect balance within the enormous com plexity of the immune system, it is not surprising that multiple self-regulatory mechanisms are organized at different levels, such as antibody feedback, idiotypic-anti-idiotypic responses, suppres sor and helper T cells, lymphokine signals and genetic require ments. A nu mb er of observations in recent years have, however, demonstrated that consistent contributions to the immunological homeostasis are given also by signals generated outside of the immune system, namely,in the central and autonomous nervous system as weIl as in the endocrine apparatus. Furthermore, the interactions between the immune system and the other body homestatic mechanisms seem to be bidirectional: if immunological cells may be targets of neuroendocrinological factors, immunological products seem in turn to contribute to the neuro endocrine homeostasis.

This book presents a comprehensive overview of important immune molecules and their structure-function relationships. The immune system is highly complex, consisting of a network of molecules, cells, tissues and organs, and the immune reaction is involved in various physiological as well as pathological processes, including development, self-tolerance, infection, immunity, and cancer. Numerous molecules participate in immune recognition, inhibition and activation, and these important immune molecules can be roughly divided into cell surface receptors, intracellular receptors and intracellular signaling molecules. The study of how these immune molecules function at molecular level has laid the foundation for understanding the immune system. The book provides researchers and students with the latest research advances concerning the structural biology of key immune molecules/pathways, and offers immunologists essential insights into how these immune molecules function.

The structure, functions, and interactions of myeloid cells have long been the focus of research and therapeutics development. Yet, much more remains to be discovered about the complex web of relationships that makes up the immune systems of animals. Scientists today are applying genome-wide analyses, single-cell methods, gene editing, and modern imaging techniques to reveal new subclasses of differentiated myeloid cells, new receptors and cytokines, and important interactions among immune cells. In Myeloid Cells in Health and Disease: A Synthesis, Editor Siamon Gordon has assembled an international team of esteemed scientists to provide their perspectives of myeloid cells during innate and adaptive immunity. The book begins by presenting the foundational research of Paul Ehrlich, Elie Metchnikoff, and Donald Metcalf. The following chapters discuss evolution and the life cycles of myeloid cells; specific types of differentiated myeloid cells, including macrophage differentiation; and antigen processing and presentation. The rest of the book is organized by broad topics in immunology, including the recruitment of myeloid and other immune cells following microbial infection the role of myeloid cells in the inflammation process and the repair of damaged tissue the vast arsenal of myeloid cell secretory molecules, including metalloproteinases, tumor necrosis factor, histamine, and perforin receptors and downstream signaling pathways that are activated following ligand-receptor binding roles of myeloid cells during microbial and parasite infections contributions of myeloid cells in atherosclerosis myeloid-derived suppressor cells in tumor development and cancer Myeloid Cells in Health and Disease: A Synthesis will benefit graduate students and researchers in immunology, hematology, microbial pathogenesis, infectious disease, pathology, and pharmacology. Established scientists and physicians in these and related fields will enjoy the book's rich history of myeloid cell research and suggestions for future research directions and potential therapies.