Download or read book Insights Into the Reciprocal Communication Between Neutrophils and Staphylococcus Aureus written by Oliwia Wiktoria Zurek and published by . This book was released on 2015 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Staphylococcus aureus (S. aureus) is a highly adaptable pathogen that can cause endocarditis, skin abscesses, tissue necrosis, and sepsis. S. aureus success can be partially attributed to its ability to colonize and subsequently infect a wide variety of host tissues. This capacity is dependent on elaborate two-component gene-regulatory systems that control expression of virulence and immunomodulatory factors. The S. aureus exoprotein expression (SaeR/S) system is recognized as a major regulator of virulence that significantly contributes to the pathogen’s ability to evade killing by the human neutrophil. However, it is unclear how this system becomes activated and how the SaeR/S system modulates neutrophil function. In this study, we elucidated how S. aureus evades neutrophil killing by studying the reciprocal communication between the host and pathogen. We demonstrated that only select SaeR/S-regulated genes (as opposed to all targets) were transcriptionally up-regulated in response to stimulation by neutrophils as well as alpha-defensin and show that the mouse skin environment (that lacks alpha-defensin) promoted transcription of specific saeR/S-targets, different from the expression profile elicited following neutrophil interaction or alpha-defensin. These results were unexpected and demonstrated differential activation of saeR/S targets was dependent on specific stimuli. Furthermore, we studied the influence of SaeR/S on neutrophil function and showed that this system promoted accelerated cell death by decreasing NF-kB activity, and in-turn IL- 8 production, to promote neutrophil lysis. These findings underscored the importance of neutrophil signaling demonstrating that neutrophil-derived production of IL-8 was necessary for this cell to kill S. aureus effectively. It follows that treatment of human neutrophils with recombinant IL-8 significantly increased neutrophil staphylocidal activity. Finally, we propose that both timing and magnitude of inflammation in neutrophils play major roles in dictating the outcome of staphylococcal disease and that alteration in the innate ability of neutrophils to produce IL-8 may increase susceptibility to S. aureus infections. Taken together, the findings define novel pathogen- and host-derived factors that play pivotal roles in the course of S. aureus infection.
Download or read book Buruli Ulcer written by Gerd Pluschke and published by Springer. This book was released on 2019-04-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major objective of this open access book is to summarize the current status of Buruli Ulcer (BU) research for the first time. It will identify gaps in our knowledge, stimulate research and support control of the disease by providing insight into approaches for surveillance, diagnosis, and treatment of Buruli Ulcer. Book chapters will cover the history, epidemiology diagnosis, treatment and disease burden of BU and provide insight into the microbiology, genomics, transmission and virulence of Mycobacterium ulcerans.
Download or read book The Neutrophil written by Jon S. Abramson and published by Oxford University Press, USA. This book was released on 1993 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third book in the group devoted to the "natural" immune system, this volume provides the ideal detailed, up-to-date overview of neutrophil function. Distilling new information alongside observations of the past, the book focuses on some of the most critical developments in currentneutrophil research. Specific examples of diseases resulting from neutrophil dysfunction and deficiency are brought to life by clinical case studies. An essential source of current research into this exciting field, this volume will be invaluable for advanced students and researchers in immunology,cell biology, and medicine.
Download or read book Staphylococci in Human Disease written by Kent B. Crossley and published by John Wiley & Sons. This book was released on 2009-10-13 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Staphylococci remain the most important cause of hospital-acquiredinfections in the U.S. and MRSA has become the most common cause ofskin and soft tissue infection in many parts of the world. There is now a much greater understanding of the physiology andevolution of the staphylococci and this new edition reflects therapid advancements in knowledge about this pathogen and provides acomprehensive review from both clinical and basic scienceperspectives. The first section addresses the basic biology of thestaphylococci, their molecular genetics, host defenses and hostevasion, virulence determinants, mechanisms of antibioticresistance, and laboratory techniques. The second section dealswith epidemiology, and the third section provides an overview ofthe varied clinical manifestations of human staphylococcalinfections. The fourth section covers prevention and treatment ofthese often life-threatening infections. Written by experts from around the globe, this book is essentialreading for all clinicians and basic scientists studying thestaphylococci.
Download or read book Immunotherapy for Tumor in the Brain Insights From and For Other Tumor Sites written by Lois A. Lampson and published by Frontiers Media SA. This book was released on 2018-07-09 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tumor immunotherapy has now shown its promise for many, its disappointments and failings for others. Going forward, brain tumor patients can both benefit and contribute. Tumor immunotherapy is steadily progressing. As experience accumulates, it is important to consider its generality. The reviews herein emphasize the brain’s place among other tumor sites. Two major topics are addressed. THE SITE: WHAT CAN WE EXPECT FROM IMMUNOTHERAPY WHEN THE TARGET IS IN THE BRAIN? Experience with immunotherapy for different targets in the brain, including tumor and also pathogens, is reviewed. Long-standing assumptions are confronted. The potential for beneficial responses is stressed. BRAIN TUMOR IMMUNOTHERAPY: WHAT HAVE WE LEARNED SO FAR? Clinical experience with brain tumor immunotherapy, from a variety of centers, is reviewed. Primary tumors, emphasizing glioblastoma, and brain metastases are each considered.
Download or read book Store Operated Calcium Channels written by and published by Academic Press. This book was released on 2013-07-24 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Store-operated calcium channels are found in most animal cells and regulate many cellular functions including cell division, growth, differentiation, and cell death. This volume provides a concise and informative overview of the principles of store-operated calcium entry and the key developments in the field from researchers who have led these advances. The overall goal of the volume is to provide interested students and investigators with sufficient information to enable a broad understanding of the progress and current excitement in the field. The volume contains a wealth of information that even experienced investigators in the field will find useful. The volume provides a comprehensive overview of the mechanisms and functions of store-operated calcium channels Contributors are authoritative researchers who have produced important advances in the field The volume is well-illustrated with cartoons and data to facilitate easy comprehension of the subject
Download or read book Guidelines for Drinking water Quality written by World Health Organization and published by World Health Organization. This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes the methods used in the surveillance of drinking water quality in the light of the special problems of small-community supplies, particularly in developing countries, and outlines the strategies necessary to ensure that surveillance is effective.
Download or read book NETosis At the Intersection of Cell Biology Microbiology and Immunology written by Mariana J. Kaplan and published by Frontiers E-books. This book was released on 2013-08-08 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: NETosis is a unique form of cell death that is characterized by the release of decondensed chromatin and granular contents to the extracellular space. The initial observation of NETosis placed the process within the context of the innate immune response to infections. Neutrophils, the most numerous leukocytes that arrive quickly at the site of an infection, were the first cell type shown to undergo extracellular trap formation. However, subsequent studies showed that other granulocytes are also capable of releasing nuclear chromatin following stimulation. The extracellular chromatin acts to immobilize microbes and prevent their dispersal in the host. Bacterial breakdown products and inflammatory stimuli induce NETosis and the release of NETs requires enzyme activities. Histones in NET chromatin become modified by peptidylarginine deiminase 4 (PAD4) and cleaved at specific sites by proteases. NETs serve for attachment of bactericidal enzymes including myeloperoxidase, leukocyte proteases, and the cathelicidin LL-37. While the benefit of NETs in an infection appears clear, NETs also figure prominently at the center of various pathologic states. Therefore, it is important for NETs to be efficiently cleared; else digestive enzymes may gain access to tissues where inflammation takes place. Persistent NET exposure at sites of inflammation may lead to a further complication: NET antigens may provoke acquired immune responses and, over time, could initiate autoimmune reactions. Recent studies identified aberrant NET synthesis and/or clearance in inflammatory/autoimmune conditions such as systemic lupus erythematosus (SLE), psoriasis, ANCA-positive vasculitis, gout and Felty’s syndrome. In the case of SLE, for example, it appears that LL-37 exposed in the NETs may be a significant trigger of type I Interferon responses in this disease. Recent evidence also implicates aberrant NET formation in the development of endothelial damage, atherosclerosis and thrombosis. NETosis is thus of interest to researchers who investigate innate immune responses, host-pathogen interactions, chronic inflammatory disorders, cell and vascular biology, biochemistry, and autoimmunity. As we approach the 10-year-anniversary of the initial discovery of NETosis, it is useful and timely to review the so far identified mechanisms and pathways of NET formation, their role in bacterial and fungal defense and their putative importance as inducers of autoimmune responses. We look forward to a rich and rigorous discussion of these and related issues that benefit from interdisciplinary approaches, collaborations and exciting discoveries.
Download or read book Oral Health in America written by and published by . This book was released on 2000 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pediatric Board Study Guide written by Osama Naga and published by Springer. This book was released on 2015-03-27 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the most frequently asked and tested points on the pediatric board exam. Each chapter offers a quick review of specific diseases and conditions clinicians need to know during the patient encounter. Easy-to-use and comprehensive, clinicians will find this guide to be the ideal final resource needed before taking the pediatric board exam.
Download or read book Biology of the Mammary Gland written by John A. Mol and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the European Cooperation in the Field of Scientific and Technical Research (COST 825) Symposium on Mammary Gland Biology, held September 16-18, 1999, in Tours, France. It is difficult to overstate the evolutionary and functional significance of mammary tissue in biology. Substantial progress has been made by researchers in various disciplines, particularly over the last fifteen years, towards realizing the potential of this tissue to yield powerful experimental models for morphogenesis and tissue development; for cellular differentiation; for the biosynthesis and secretion of proteins, lipids, small molecules and inorganic salts; and for the coordination and regulation of these processes. More recently, the possibility of exploiting the secretory epithelial cells of mammary tissue as `cell factories' has become a reality and the recombinant production by lactating animals of an increasing number of proteins, valuable both in the pharmaceutical and `nutraceutical' fields, is in progress or under development. Also in this sphere of agricultural production, genetic as well as nutritional technologies are under investigation and exploitation to optimize milk composition for various end-uses - for instance in food process and manufacture. The possibilities of deriving health benefit from the bioactive properties of some of the minor constituents of milk are emerging to counter the highly-publicized negative health impact of excessive consumption of saturated animal fats. In human nutrition and medicine, the mammary gland is both a source of nutrition to the neonate and a potential health threat to the adult female - breast cancer remains the major single cause of female mortality in most developed countries. This volume provides a unique glimpse into our understanding, at the cutting edge of a variety of disciplines, of this versatile and extraordinary tissue, at the birth of the twenty-first century.
Download or read book Antimicrobial Peptides written by Katsumi Matsuzaki and published by Springer. This book was released on 2019-04-12 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an overview of antimicrobial peptides (AMPs), their mechanisms of antimicrobial action, other activities, and various problems that must still be overcome regarding their clinical application. Divided into four major parts, the book begins with a general overview of AMPs (Part I), and subsequently discusses the various mechanisms of antimicrobial action and methods for researching them (Part 2). It then addresses a range of activities other than antimicrobial action, such as cell penetration, antisepsis, anticancer, and immunomodulatory activities (Part 3), and explores the prospects of clinical application from various standpoints such as the selective toxicity, design, and discovery of AMPs (Part 4). A huge number of AMPs have been discovered in plants, insects, and vertebrates including humans, and constitute host defense systems against invading pathogenic microorganisms. Consequently, many attempts have been made to utilize AMPs as antibiotics. AMPs could help to solve the urgent problem of drug-resistant bacteria, and are also promising with regard to sepsis and cancer therapy. Gathering a wealth of information, this book will be a bible for all those seeking to develop antibiotics, anti-sepsis, or anticancer agents based on AMPs.
Download or read book Molecular Basis of Health and Disease written by Undurti N. Das and published by Springer Science & Business Media. This book was released on 2011-04-02 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes how the balance between pro- and anti-inflammatory molecules is related to health and disease. It is suggested that many diseases are initiated and their progress is influenced by inflammatory molecules and a decrease in the production and/or action of anti-inflammatory molecules and this imbalance between pro- and anti-inflammatory molecules seems to have been initiated in the perinatal period. This implies that strategies to prevent and manage various adult diseases should start in the perinatal period. An alteration in the metaolism of essential fatty acids and their anti-inflammatory molecules such as lipoxins, resolvins, protecitns, maresins and nitrolipids seems to play a major role in the pathobiology of several adult diseases. Based on these concepts, novel therapeutic approaches in the management of insulin resistance, obesity, type 2 diabetes mellitus, metabolic syndrome, cancer, lupus, rheumatoid arthritis and other auto-immune diseases are presented. Based on all these evidences, a unified concept that several adult diseases are due to an alteration in the balance between pro- and anti-inflammatory molecules is discussed and novel methods of their management are presented.
Download or read book Essential Immunology written by Ivan Maurice Roitt and published by . This book was released on 1971 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Ecology in States of Health and Disease written by Institute of Medicine and published by National Academies Press. This book was released on 2014-02-18 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Individually and collectively, resident microbes play important roles in host health and survival. Shaping and shaped by their host environments, these microorganisms form intricate communities that are in a state of dynamic equilibrium. This ecologic and dynamic view of host-microbe interactions is rapidly redefining our view of health and disease. It is now accepted that the vast majority of microbes are, for the most part, not intrinsically harmful, but rather become established as persistent, co-adapted colonists in equilibrium with their environment, providing useful goods and services to their hosts while deriving benefits from these host associations. Disruption of such alliances may have consequences for host health, and investigations in a wide variety of organisms have begun to illuminate the complex and dynamic network of interaction - across the spectrum of hosts, microbes, and environmental niches - that influence the formation, function, and stability of host-associated microbial communities. Microbial Ecology in States of Health and Disease is the summary of a workshop convened by the Institute of Medicine's Forum on Microbial Threats in March 2013 to explore the scientific and therapeutic implications of microbial ecology in states of health and disease. Participants explored host-microbe interactions in humans, animals, and plants; emerging insights into how microbes may influence the development and maintenance of states of health and disease; the effects of environmental change(s) on the formation, function, and stability of microbial communities; and research challenges and opportunities for this emerging field of inquiry.
Download or read book Biological Specimen Preparation for Transmission Electron Microscopy written by Audrey M. Glauert and published by Princeton University Press. This book was released on 2014-07-14 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains all the necessary information and advice for anyone wishing to obtain electron micrographs showing the most accurate ultrastructural detail in thin sections of any type of biological specimen. The guidelines for the choice of preparative methods are based on an extensive survey of current laboratory practice. For the first time, in a textbook of this kind, the molecular events occurring during fixation and embedding are analysed in detail. The reasons for choosing particular specimen preparation methods are explained and guidance is given on how to modify established techniques to suit individual requirements. All the practical methods advocated are clearly described, with accompanying tables and the results obtainable are illustrated with many electron micrographs. Portland Press Series: Practical Methods in Electron Microscopy, Volume 17, Audrey M. Glauert, Editor Originally published in 1999. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Download or read book Bacterial Adhesion to Cells and Tissues written by Itzhak Ofek and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: Attachment to host cells or tissues is often the first step in the establishment of bacterial infections. A complex array of recognition, attachment, and virulence factors is involved in this process, which recent research has greatly illuminated. This comprehensive and authoritative volume discusses the specific cell and tissue-specific affinities of pathogenic microorganisms, including bioinorganic surfaces such as teeth, and is an essential reference for researchers and students of host-pathogen interactions.
