Download or read book Design Production and Evaluation of a Plasmodium Falciparum Merozoite Surface Protein 2 based Vaccine for Inclusion in a Multivalent Formulation Targeting Multiple Parasite Stages written by Jacqueline Schneider Eacret and published by . This book was released on 2019 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of a highly efficacious vaccine will be necessary for malaria elimination. Studies in Plasmodium falciparum endemic areas indicate that naturally acquired antibody responses to MSP2 are associated with resistance to malaria, making PfMSP2 an attractive vaccine candidate. To overcome challenges encountered with subunit malaria vaccines, we established that the use of highly immunogenic rPfMSP8 as a carrier protein for vaccine candidates rPfMSP119 and rPfs25 facilitated production, minimized antigenic competition and enhanced induction of functional antibodies. Here, we exploited the benefits of our rPfMSP8 fusion partner to optimize a rPfMSP2-based subunit vaccine. A synthetic PfMSP2 (3D7) codon harmonized gene was used to produce unfused rPfMSP2 or chimeric rPfMSP2/8 in E. coli. Purified, rPfMSP2 formed amyloid-like fibrils in vitro, however rPfMSP2/8 did not. Immunization of rabbits and mice with both rPfMSP2 antigens elicited high titer anti-PfMSP2 antibodies that recognized the major allelic variants of native PfMSP2. Competition assays revealed differences in antibody specificities induced by the two rPfMSP2-based vaccines, with evidence of epitope masking by rPfMSP2-associated fibrils. Immunogenicity studies in mice demonstrated that formulation of rPfMSP2 vaccines with GLA-SE, a synthetic TLR4 agonist, elicited cytophilic IgG isotypes and production of Th1-associated cytokines. T cell responses were specific for epitopes within PfMSP2 and PfMSP8 domains. The rPfMSP2/8 + GLA-SE formulation induced significantly higher antibody titers with superior durability and capacity to opsonize P. falciparum merozoites for phagocytosis. Immunization with a trivalent vaccine including PfMSP2/8, PfMSP1/8 and Pfs25/8 induced high levels of antigen-specific antibody, with no evidence of antigenic competition. These results are highly encouraging for the addition of rPfMSP2/8 as a component of an efficacious, multivalent, multistage malaria vaccine.
Download or read book Towards a Multivalent Multistage Malaria Vaccine written by Elizabeth M. Parzych and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress towards the eradication of Plasmodium falciparum would be greatly enhanced by the development of a multivalent, multistage vaccine containing a transmission-blocking component. Unfortunately, several challenges have impeded the development of such a formulation, including 1) the recombinant production of complex targets in their proper native conformations, 2) the inherent, suboptimal immunogenicity of many protective candidates and 3) the induction and maintenance of protective responses against individual components in a multivalent context. Previous studies with PfMSP1, a protective blood-stage target that embodies these challenges, demonstrated that many of these issues could be addressed through the use of merozoite surface protein 8 (PfMSP8) as a carrier protein. We therefore applied this strategy to transmission-blocking vaccine candidate Pfs25. Antibodies directed against conformational epitopes within the four EGF-like domains of Pfs25 are capable of blocking sexual stage development in the mosquito vector. Using an E. coli expression system, we produced an rPfs25-PfMSP8 fusion protein (rPfs25/8(C[delta]S)) and an unfused, single rPfs25 antigen (rPfs25). rPfs25 was purified with a modest yield and required refolding procedures to obtain proper conformation. Alternatively, rPfs25/8(C[delta]S) was purified in higher yield without the need for refolding, via denaturation and renaturation, of the Pfs25 domain. Both antigens were immunogenic in rabbits, inducing IgG that bound native, parasite-associated Pfs25 and exhibited potent transmission-reducing activity. Comparative mouse studies were conducted to assess the effects of adjuvant selection (Alum vs. GLA-SE) and antigen dose (2.5 vs. 0.5 microgram) on the immunogenicity of these antigens. When formulated with Alum, a Th2-biasing adjuvant, both antigens elicited strong and comparable anti-Pfs25 titers irrespective of antigen dose. However, formulations with GLA-SE, a synthetic TLR4 agonist that supports a Th1-biased response, elicited divergent responses based on antigen. Immunization with rPfs25/8(C[delta]S) induced significantly higher anti-Pfs25 titers than immunization with rPfs25 at both doses, highlighting the requirement for genetic linkage of Pfs25 to the PfMSP8(C[delta]S) carrier in order to benefit from the adjuvant effect of GLA-SE. Of note, antigenic competition was observed when rPfs25 and rPfMSP8(C[delta]S) were co-administered as individual antigens, which was avoided through immunization with chimeric rPfs25/8(C[delta]S). Importantly, IgG induced by immunization with rPfs25/8(C[delta]S) demonstrated potent transmission-reducing activity, as measured by the in vivo standard membrane feeding assay (SMFA), irrespective of adjuvant. Based on these data, the chimeric rPfs25/8(C[delta]S) antigen was selected for further testing in a bivalent formulation with blood-stage vaccine candidate rPfMSP1/8(C[delta]S). Outbred mice that were co-immunized with rPfs25/8(C[delta]S) and rPfMSP1/8(C[delta]S) antigens produced strong antibody titers against both Pfs25 and PfMSP119 that were comparable to corresponding monovalent formulations, indicating the successful avoidance of antigenic competition. Consistent with previous results, immunization with rPfs25/8(C[delta]S) elicited comparable anti-Pfs25 antibody titers irrespective of adjuvant. However, immunization with rPfMSP1/8(C[delta]S) induced anti-PfMSP119 responses that were significantly higher when adjuvanted with GLA-SE relative to Alum-based formulations. These data are promising as we continue to assess and optimize additional blood-stage antigens (PfMSP2 and PfRh5), moving towards the ultimate goal of producing a highly efficacious, multivalent vaccine to reduce both blood stage-mediated clinical disease and transmission of P. falciparum parasites.
Download or read book Skin and Arthropod Vectors written by Nathalie Boulanger and published by Academic Press. This book was released on 2018-01-20 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research on skin immunity and the skin microbiome reveals the complexity of the skin and its importance in the development of immunity against arthropod-borne diseases. In diseases such as malaria, borreliosis, leishmaniasis, trypanosomiasis, etc., the skin interface has been shown as an essential site for pathogens to hide from the immune system, and as a potential site of persistence. Only very few vaccines have been successfully developed so far against these diseases, likely because of an insufficient understanding on the development of skin immunity against pathogens. Skin and Arthropod Vectors expands our knowledge on the role of the skin interface during the transmission of arthropod-borne diseases and particularly its immunity. This work may support researchers who strive for developing more efficient diagnostic tools and vaccines. It also gives scientists and advanced students working in related areas a better insight on how humans and animals are attractive to arthropods to develop better repellents, or to set up transgenic arthropods. Offers the only compilation of research focusing on both the skin interface and arthropod vectors, with contributions from international experts Advances research in the effort toward generating more effective diagnostic tools and vaccines focusing on the skin interface Can also serve as supplemental material for dermatology lectures or specialized lectures on medical entomology and skin immunity
Download or read book Gene Vaccines written by Josef Thalhamer and published by Springer Science & Business Media. This book was released on 2011-08-31 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The induction of antigen-specific immune responses after in vivo transfection with expression plasmids has triggered a revolution of vaccine research. After a first hype, evoked by the fascinating options of this method, clinical studies did not reach the ambitious aims and a phase of disillusion ensued. It became obvious that Gene vaccines displayed a weaker immunogenicity in humans than had been observed in the mouse models. Meanwhile these hurdles have been overcome and gene vaccines undergo a renaissance. The present book gives an update of the “world of naked gene vaccines”, namely DNA and RNA vaccines. Its content ranges from general mechanisms, inherent immunostimulatory properties and the vast potential to modulate immune responses, to recent successful clinical studies and approved veterinary gene vaccines. Beyond the state-of-the-art of genetic immunization, the reader will be stimulated with a chapter addressing “burning questions”.
Download or read book Innovations and Implementations of Computer Aided Drug Discovery Strategies in Rational Drug Design written by Sanjeev Kumar Singh and published by Springer Nature. This book was released on 2021-02-02 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents various computer-aided drug discovery methods for the design and development of ligand and structure-based drug molecules. A wide variety of computational approaches are now being used in various stages of drug discovery and development, as well as in clinical studies. Yet, despite the rapid advances in computer software and hardware, combined with the exponential growth in the available biological information, there are many challenges that still need to be addressed, as this book shows. In turn, it shares valuable insights into receptor-ligand interactions in connection with various biological functions and human diseases. The book discusses a wide range of phylogenetic methods and highlights the applications of Molecular Dynamics Simulation in the drug discovery process. It also explores the application of quantum mechanics in order to provide better accuracy when calculating protein-ligand binding interactions and predicting binding affinities. In closing, the book provides illustrative descriptions of major challenges associated with computer-aided drug discovery for the development of therapeutic drugs. Given its scope, it offers a valuable asset for life sciences researchers, medicinal chemists and bioinformaticians looking for the latest information on computer-aided methodologies for drug development, together with their applications in drug discovery.
Download or read book Sulfated Polysaccharides written by Miguel Gama and published by Nova Science Publishers. This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the post-genomic era, science is still challenged to explain the biosynthesis of complex polysaccharides and glycoconjugates. Unlike nucleic acids and proteins, the information needed for their biosynthesis is not clearly contained to this day within the genome of the various organisms. This means that no biosynthetic code has been revealed yet. As a result, there will be millions of structurally distinct, functional chemical species at the end of their biosynthesis. This book offers an up-to-date view on sulfated polysaccharide structure and function state of the art in different life kingdoms: bacteria, protista, plantae, fungi and animalia. The structure, activities and current thinking on the interplay between these two vital features (as well as ways to study them) are reviewed in the present book. The growing economical interest in sulfated polysaccharides due to their potential biotechnological use in different areas, such as pharmaceutical and food industries, are also commented on. The information within the chapters adds to other prior available literature; the intention of the authors was to extend and further develop the discussions related to glycobiology.
Download or read book Diagnostic Medical Parasitology written by Lynne Shore Garcia and published by John Wiley & Sons. This book was released on 2020-08-06 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diagnostic Medical Parasitology covers all aspects of human medical parasitology and provides detailed, comprehensive, relevant diagnostic methods in one volume. The new edition incorporates newly recognized parasites, discusses new and improved diagnostic methods, and covers relevant regulatory requirements and has expanded sections detailing artifact material and histological diagnosis, supplemented with color images throughout the text.
Download or read book Vaccines written by Ciro A. de Quadros and published by Pan American Health Org. This book was released on 2004 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication contains a number of papers which consider the public health role of vaccines in improving the health of the world's populations, and looks at the challenges of using immunisation to combat emerging and re-emerging diseases. Issues discussed include the innovative use of vaccines against diseases such as meningococcal infection in Africa, Haemophilus influenza type b, varicella, and hepatitis, efforts to develop a new generation of vaccines against cholera and typhoid, shigella and Helicobacter pylori, as well as developments in the quest for vaccines against tuberculosis, HIV/AIDS, dengue, malaria, and hookworm. It also deals with the use of vaccines to fight bioterrorism attacks; regulatory and safety issues; financing issues, impact of health sector reform and the sustainability of immunisation programmes.
Download or read book Apicomplexan Parasites written by Katja Becker and published by John Wiley & Sons. This book was released on 2011-01-19 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is the first dealing with the discovery of drugs directed against apicomplexan parasites. Amongst others, this group of endoparasites includes the causative agents of Malaria, Toxoplasmosis, and Babesiosis, the latter occurring mainly in animals. Written by renowned scientific experts from academia and industry, the book focuses on currentdrug development approaches for all apicomplexan diseases making it appealing to a large audience, ranging from research labs in academia to the human and veterinarian pharmaceutical industry. This work is the second volume of the new book series 'Drug Discovery in Infectious Diseases', edited by Prof. Dr Paul M. Selzer.
Download or read book Veterinary Vaccines written by Samia Metwally and published by John Wiley & Sons. This book was released on 2021-04-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a concise and authoritative reference on the use of vaccines against diseases of livestock Compiled by Senior Animal Health Officers at The Food and Agriculture Organization of the United Nations, and with contributions from international leading experts, Veterinary Vaccines: Principles and Applications is a concise and authoritative reference featuring easily readable reviews of the latest research in vaccinology and vaccine immune response to pathogens of major economic impact to livestock. It covers advice and recommendations for vaccine production, quality control, and effective vaccination schemes including vaccine selection, specifications, vaccination programs, vaccine handling in the field, application, failures, and assessment of herd protection. In addition, the book presents discussions on the current status and potential future developments of vaccines and vaccination against selected transboundary animal diseases. Provides a clear and comprehensive guide on using veterinary vaccines to protect livestock from diseases Teaches the principles of vaccinology and vaccine immune response Highlights the vaccine production schemes and standards for quality control testing Offers easy-to-read reviews of the most current research on the subject Gives readers advice and recommendations on which vaccination schemes are most effective Discusses the today’s state of vaccines and vaccination against selected transboundary animal diseases as well as possible future developments in the field Veterinary Vaccines: Principles and Applications is an important resource for veterinary practitioners, animal health department officials, vaccine scientists, and veterinary students. It will also be of interest to professional associations and NGO active in livestock industry.
Download or read book Essential Malariology written by Leonard Jan Bruce-Chwatt and published by John Wiley & Sons. This book was released on 1985 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inactivated Hepatitis B Virus Vaccine written by and published by . This book was released on 1982 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aptamers for Medical Applications written by Yiyang Dong and published by Springer Nature. This book was released on 2021-03-25 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book outlines comprehensively the main medical uses of aptamers, from diagnosis to therapeutics in fourteen chapters. Pioneering topics covered include aptamer pharmaceuticals, aptamers for malign tumors, aptamers for personalized therapeutics and aptamers for point-of-care testing. The book offers an essential guide for medical scientists interested in developing aptamer-based schemes for better theranostics. It is therefore of interest for not only academic researchers, but also practitioners and medical researchers in various fields of medical science, medical research and bio-analytical chemistry.
Download or read book Medical Biotechnology written by Bernard R. Glick and published by John Wiley & Sons. This book was released on 2020-08-06 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future is now—this groundbreaking textbook illustrates how biotechnology has radically changed the way we think about health care Biotechnology is delivering not only new products to diagnose, prevent, and treat human disease but entirely new approaches to a wide range of difficult biomedical challenges. Because of advances in biotechnology, hundreds of new therapeutic agents, diagnostic tests, and vaccines have been developed and are available in the marketplace. In this jargon-free, easy-to-read textbook, the authors demystify the discipline of medical biotechnology and present a roadmap that provides a fundamental understanding of the wide-ranging approaches pursued by scientists to diagnose, prevent, and treat medical conditions. Medical Biotechnology is written to educate premed and medical students, dental students, pharmacists, optometrists, nurses, nutritionists, genetic counselors, hospital administrators, and individuals who are stakeholders in the understanding and advancement of biotechnology and its impact on the practice of modern medicine. Hardcover, 700 pages, full-color illustrations throughout, glossary, index.
Download or read book Current Topics and Emerging Issues in Malaria Elimination written by and published by BoD – Books on Demand. This book was released on 2021-07-21 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria is one of the most important tropical diseases in the history of the world. This vector-borne disease has been a significant cause of morbidity and mortality in tropical countries of Africa, Asia, and Latin America. As such, this book provides updated information on epidemiological and public health research of malaria conducted in the last decade. Over four sections, chapters discuss such topics as diagnosis, epidemiology and surveillance, policy and prevention, and vector control and vaccines.
Download or read book Microbes written by Prakash S. Bisen and published by John Wiley & Sons. This book was released on 2012-06-22 with total page 731 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accessible introduction to the world of microbes—from basic microbe biology through industrial applications Microbes affect our lives in a variety of ways—playing an important role in our health, food, agriculture, and environment. While some microbes are beneficial, others are pathogenic or opportunistic. Microbes: Concepts and Applications describes basic microbe biology and identification and shows not only how they operate in the subfields of medicine, biotechnology, environmental science, bioengineering, agriculture, and food science, but how they can be harnessed as a resource. It provides readers with a solid grasp of etiologic agents, pathogenic processes, epidemiology, and the role of microbes as therapeutic agents. Placing a major emphasis on omics technology, the book covers recent developments in the arena of microbes and discusses their role in industry and agriculture, as well as in related fields such as immunology, cell biology, and molecular biology. It offers complete discussions of the major bacterial, viral, fungal, and parasitic pathogens; includes information on emerging infectious diseases, antibiotic resistance, and bioterrorism; and talks about the future challenges in microbiology. The most complete treatment of microbial biology available, Microbes features eye-opening chapters on: Human and Microbial World Gene Technology: Application and Techniques Molecular Diagnostic and Medical Microbiology Identification and Classification of Microbes Diversity of Microorganisms Microbes in Agriculture Microbes as a Tool for Industry and Research Complete with charts and figures, this book is an invaluable textbook for university teachers, students, researchers, and people everywhere who care about microorganisms.
Download or read book Advances in the Control of Theileriosis written by A.D. Irvin and published by Springer Science & Business Media. This book was released on 1981-09-30 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately five years have elapsed since the Conference on "Tick-borne Diseases and their Vectors" (Wilde, 1978, University of Edinburgh) was held at the Centre for Tropical Veterinary Medicine in Edinburgh. Theileriosis was one of the main topics at that Conference and some 20 scientific presentations were given. Also in the same year a Workshop on "Theileriosis" was held at the Kenyatta Conference Centre in Nairobi (Henson & Campbell, 1977, IDRC, Ottawa). Both of these meetings provided a valuable up dating of theilerial diseases, and the Proceedings have been a constant source of reference for scientists in the ensuing years. The meetings played a significant role in setting the scene for a number of important advances which have been made since then. In February of this year, attention was focused on these advances when nearly 200 scientists from over 30 countries were assembled at the International Laboratory for Research on Animal Diseases in Nairobi for the international conference on "Advances in the Control of Theileriosis". The interest and concern shown in this subject has now grown to the extent that more than 70 scientific presentations were given over the course of a very busy week. An important facet of the Conference was the attention given to the control of Theileriosis, since this must be the ultimate aim of all those involved with the disease. Control will be difficult.
