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Over the generations the skin has been the site for immunization against smallpox. This method of immunization was described in a letter written by Lady Mary Montagu on April 1, 1717 in Adrianopole, Turkey: "The small-pox, so fatal, and so general amongst us, is here entirely harmless by the invention of ingrafting, which is the term they give it. . . The old woman comes with a nut-shell full of the matter of the best sort of small-pox . . . She immediately rips open (the skin) with a large needle . . . and puts into the vein as much venom as can lie upon the head of her needle, and after binds up the wound. There is no example of anyone that died of it; and you may believe that I am satisfied of the safety of this experiment since I intend to try it on my dear little son" (Letters from the right Honourable Lady Mary Montagu 1709-1762. Published by J. M. Dent and Co. London, 2nd edition, September, 1906, p. 124. ) The "variolation" method was, 80 years later, markedly improved by the use of cowpox virus, as reported by Edward Jenner in 1796. The successful method of intradermal immunization against smallpox and later against other virus diseases is in fact based on the presence of anitigen-presenting dendritic cells in the skin.
Dendritic cells are vital to induce potent anti-viral immune responses. It will become clear to the reader that dendritic cells often play a dual role during viral infections. On the one hand they are able to mount potent antiviral immune responses, and on the other hand several viruses, including HIV-1, use DC as a vector to be transferred from the periphery to the lymph nodes where they infect their prime target.
Dendritic cells play the most vital part in inducing anti-viral immune responses in HIV and AIDS among many other viruses. Research on dendritic cells (DCs) is emerging as a fundamental aspect for the comprehension of the mechanisms underlying the pathogenesis of viral diseases. This volume focuses on the role of DCs in the pathogenesis and immunity of HIV-1 infection. It is the only comprehensive volume on pathogenesis and immunity of Dendritic Cells that also focuses on HIV.
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.
"Dendritic cells and Langerhans cells are antigen presenting cells and therefore critical in the initiation of immune responses to control viral infections. However, various viruses hijack the function of these immune cells for establishing infection and dissemination in the host, Thus, the cellular and molecular characteristics of dendritic cells and Langerhans cells are among the first determinants that control either viral restriction or dissemination. The research described in this thesis is focused on the different ways in which viruses exploit the function of dendritic cells and Langerhans cells for dissemination in a newly infected host. We have mainly focused on cell-to-cell transmission of different viruses (human immunodeficiency virus, Dengue virus, enterovirus A71) mediated by dendritic cells and Langerhans cells during early transmission, and we have identified various receptors and their cellular internalization pathways involved. Moreover, we have shown that external factors such as a dysbiotic human microbiome influences not only immune responses via dendritic cells, but also cell-to-cell transmission by Langerhans cells, thereby enhancing susceptibility to viruses. Our results demonstrate that the specific characteristics of dendritic cells and Langerhans cells impact the rate of viral dissemination and emphasize the significant contribution of cellular internalization pathways in cell-to-cell transmission. The mode of viral transmission is an important determinant in the approach of therapeutic strategies. Hence, progress in the understanding of early transmission events can provide alternative treatment approaches to interfere with this process or provide early diagnostics tools to identify populations at risk."--
This volume of Current Topics in Microbiology and Immunology covers diverse topics related to intradermal immunization. The chapters highlight the effectiveness of intradermal immunization in experimental animal models or in clinical practice, all supporting the view that intradermal immunization is at least as good as other immunization routes. Keeping in mind that current vaccines are not specially designed for intradermal immunization, but show comparable efficiency even at reduced dosages, this underlines the great potential for the skin as a vaccination site. Hopefully, the overview in this volume will encourage vaccine designers to focus on this promising immunization route, and in addition, to inspire them to develop vaccines that are especially optimized for intradermal immunization.
These proceedings contain selected contributions from the participants to the Fourth International Symposium on Dendritic cells that was held in Venice (Lido) Italy, from Oc tober 5 to 10, 1996. The symposium was attended by more than 500 scientists coming from 24 different countries. Studies on dendritic cells (DC) have been greatly hampered by the difficulties in preparing sufficient cell numbers and in a reasonable pure form. At this meeting it has been shown that large quantities of DC can be generated from precursors in both mice and humans, and this possibility has enormously encouraged studies aimed to characterize DC physiology and DC-specific genes, and to employ DC therapeutically as adjuvants for im munization. The possibility of generating large numbers of autologous DC that can be used in the manipulation of the immune response against cancer and infectious diseases has tremendously boosted dendritic cell research and the role of DC in a number of medi cal areas has been heatedly discussed.
This book gives a comprehensive overview of HIV and AIDS including NeuroAIDS, as well as general concepts of pathology, immunity and immunopathology, diagnosis, treatment, epidemiology and etiology to current clinical recommendations in management of HIV/AIDS including NeuroAIDS, highlighting the ongoing issues, recent advances and future directions in diagnostic approaches and therapeutic strategies.
Dendritic Cells is the first definitive book on this subject, and brings together the most current information in the field for scientists and clinicians. It outlines research studies, the first reports of therapeutic applications of dendritic cells, and the enormous potential of these unique cells. Contributors are from the key research groups around the world who are working on the immunobiology of dendritic cells and in applied areas, striving to develop their therapeutic potential.