Techniques In Insect Immunology

The importance of insects for human welfare is unquestionable. This laboratory manual summarizes a number of key methods used by insect immunologists around the world. It should be helpful for those already working in this field & especially for scientists with general interest in this research topic as a methodical guide for the first steps. The experiments are described in detail, with step-by-step directions. Basic procedure for activation, detection, quantification & characterization of cellular & humoral defense reactions are given, along with protocols for more detailed investigations of cell differentiation & isolation of insect immune factors. Population genetic aspect, viral pathology & comparative studies revealing similarities with the vertebrate immune system are also included. The result described in the chapters show remarkable progress in our understanding of insect immunology. Simultaneously, the large number of still-unanswered questions make us realize that we have a lot left to learn about these fascinating animals. From future investigation we can expect a better understanding of the immune system's evolution, the discovery of new antimicrobial & regulatory insect molecules potentially useful in the therapy of human disease & new strategies for insect control.

Insects as a group occupy a middle ground in the biosphere between bacteria and viruses at one extreme, amphibians and mammals at the other. The size and general nature of insects present special problems to the study of ento mology. For example, many commercially available instruments are geared to measure in grams, while the forces commonly encountered in studying insects are in the milligram range. Therefore, techniques developed in the study of insects or in those fields concerned with the control of insect pests are often unique. Methods for measuring things are common to all sciences. Advances some times depend more on how something was done than on what was measured; indeed a given field often progresses from one technique to another as new methods are discovered, developed, and modified. Just as often, some of these techniques find their way into the classroom when the problems involved have been sufficiently ironed out to permit students to master the manipulations in a few laboratory periods. Many specialized techniques are confined to one specific research labora tory. Although methods may be considered commonplace where they are used, in another context even the simplest procedures may save considerable time. It is the purpose of this series (1) to report new developments in method ology, (2) to reveal sources of groups who have dealt with and solved particular entomological problems, and (3) to describe experiments which may be appli cable for use in biology laboratory courses.

This volume details methods and protocols necessary to further the study of insect immunity. Chapters guide readers through up-to-date genomic and transcriptomic approaches, insect samples for proteomic analysis, hemocytes in Drosophila, cellular response in Lepidoptera, insect AMPs, manipulate the composition of mosquito microbiota, viral infections in insects, infections by entomopathogenic nematodes, immune response following oral infections, and protocols to to monitor the effect of septic infections with human pathogens using B. mori as a model. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Immunity in Insects aims to ensure successful results in the further study of this vital field.

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In insect and other arthropod immune systems, discrimination between self and nonself tissues is accomplished through the combined actions of two immunocytes and several humoral factors. Immunology of Insects and Other Arthropods presents a comprehensive look at this and other important topics in arthropod immunology. Issues discussed include insect immunocytes and other hemocytes, including computer image analysis of immunocyte serial sections; the two basic cellular immune reactions (phagocytosis and encapsulation), including the molecular basis and roles of gap junctions in encapsulation; how encapsulation is affected by polydnavirus and encapsulation-promoting factors; why insect cells are immune to HIV; humoral factors; and antibacterial factors in Lepidoptera, Diptera, and other insect orders. Other topics include hemolymph proteins interacting with mammalian complement cascade; adaptive humoral response in the American cockroach; antigenic stimulation of hemaglutinin production in insects; and the applications of the Limulus Amebocyte Lysate (LAL) in detecting endotoxins in pharmaceuticals, medical devices, clinical diagnosis, and hygienic control. This book represents an important reference source for hematologists, pathologists, immunologists, AIDS researchers, comparative immunologists, and pharmaceutical companies.

Under continual attack from both microbial pathogens and multicellular parasites, insects must cope with immune challenges every day of their lives. However, this has not prevented them from becoming the most successful group of animals on the planet. Insects possess highly-developed innate immune systems which have been fine-tuned by an arms race with pathogens spanning hundreds of millions of years of evolutionary history. Recent discoveries are revealing both an unexpected degree of specificity and an indication of immunological memory - the functional hallmark of vertebrate immunity. The study of insect immune systems has accelerated rapidly in recent years and is now becoming an important interdisciplinary field. Furthermore, insects are a phenomenally rich and diverse source of antimicrobial chemicals. Some of these are already being seriously considered as potential therapeutic agents to control microbes such as MRSA. Despite a burgeoning interest in the field, this is the first book to provide a coherent synthesis and is clearly structured around two broadly themed sections: mechanisms of immunity and evolutionary ecology. This novel text adopts an interdisciplinary and concept-driven approach, integrating insights from immunology, molecular biology, ecology, evolutionary biology, parasitology, and epidemiology. It features contributions from an international team of leading experts. Insect Infection and Immunity is suitable for both graduate students and researchers interested in insect immunity from either an evolutionary, genetical, physiological or molecular perspective. Due to its interdisciplinary and concept-driven approach, it will also appeal to a broader audience of immunologists, parasitologists and evolutionary biologists requiring a concise overview.

Given the critical importance of insect immunology in insect vector-parasite interactions and vector control, biological control of agricultural insect pests, and other key areas of entomological research and practice, a new comprehensive work summarizing recent breakthroughs in this rapidly expanding field is sorely needed. This work will constitute the first book-length publication on the topic of insect immunology since 1991, complimenting earlier works by offering a fresh perspective on current research. Interactions of host immune systems with both parasites and pathogens will be presented as well as the genomics and proteomics approaches which have been lacking in other publication. * Encompasses the most important topics of insect immunology including mechanisms, genes, proteins, evolution and phylogeny * Provides comprehensive coverage of topics important to medical researchers including Drosophila as a model for studying cellular and humoral immune mechanisms, biochemical mediators of immunity, and insect blood cells and their functions * Most up-to-date information published with contributions from international leaders in the field