Download or read book Identification of Novel Proteins on the Surface of Plasmodium Falciparum Infected Erythrocytes written by Weidong Zhu and published by . This book was released on 2004 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proteomics Approach Reveals Novel Proteins on the Surface of Malaria Infected Erythrocytes written by and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proteins on the surface of parasite-infected erythrocytes (PIESPs) have been one of the major focuses of malaria research due to their role in pathogenesis and their potential as targets for immunity and drug intervention. Despite intense scrutiny, only a few surface proteins have been identified and characterized. We report the identification of two novel surface proteins from Plasmodium falciparum-infected erythrocytes. Surface proteins were fractionated through biotin streptavidin interaction and analyzed by shotgun proteomics. From a list of 36 candidates, two were selected for further characterization. The surface location of both proteins was confirmed by confocal microscopy using specific antibodies. PIESP1 and PIESP2 are unlikely to be associated with knobs, the protrusions on the parasite-infected erythrocyte (PIE) surface. In contrast to other known PIESPs, such as PfEMP1 and Rifin, these novel proteins are encoded by single copy genes, highly conserved across Plasmodium ssp., making them good targets for interventions with a broad specificity to various P. falciparum isolates.
Download or read book Malaria written by Institute of Medicine and published by National Academies Press. This book was released on 1991-02-01 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria is making a dramatic comeback in the world. The disease is the foremost health challenge in Africa south of the Sahara, and people traveling to malarious areas are at increased risk of malaria-related sickness and death. This book examines the prospects for bringing malaria under control, with specific recommendations for U.S. policy, directions for research and program funding, and appropriate roles for federal and international agencies and the medical and public health communities. The volume reports on the current status of malaria research, prevention, and control efforts worldwide. The authors present study results and commentary on the: Nature, clinical manifestations, diagnosis, and epidemiology of malaria. Biology of the malaria parasite and its vector. Prospects for developing malaria vaccines and improved treatments. Economic, social, and behavioral factors in malaria control.
Download or read book Encyclopedia of Malaria written by and published by Springer. This book was released on 2018-07-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Malaria represents a vast databank of information about the study of malaria. It provides an overview of the historical, rapid and significant developments that have occurred in malaria research, including the 2002 genome sequencing of Plasmodium falciparum and its mosquito vector, Anopheles gambiae. This work provides a concise source of up-to-date research findings in the form of definitions and essays and present comprehensive coverage of topics from history to findings to diagnosis and treatment, written by recognized malaria researchers with practical experience. It appeals to a diverse audience, including malaria researchers, teachers, investigators and public health professionals.
Download or read book Identification of Potential New Merozoite Surface Proteins in the Plasmodium Falciparum 3D7 Genome written by Cynthia Santamaria and published by . This book was released on 2005 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Here we report the identification of 15 potential MSP-like proteins from the P. falciparum 3D7 genome using a bioinformatics-based approach. One candidate, renamed URF1, was further characterized by cloning into the Gateway system. We were able to demonstrate expression of URF1 during the blood stage, especially the trophozoite, early and late schizont phases, by immunofluorescence on infected RBC using antisera raised in mice with an URF1 DNA vaccine. URF1 expression in the merozoite stage could not be confirmed in this study. Future co-localization and immunosorbent electron microscopy (EM) experiments would help us determine the exact localization of URF1 on the parasite before officially categorizing URF1 as a merozoite surface protein. As a whole, this research project demonstrates the success of using bioinformatics in identifying potential new MSP-like proteins found in the malaria genome. Further characterization and sequence analysis of the other 15 candidates may reveal other novel antigens expressed during the erythrocytic stage, especially in the merozoite stage. Such antigens may prove to be good vaccine candidates." --
Download or read book The Identification of Novel Variant Surface Antigens of Plasmodium Falciparum written by Amanda Kathleen Lukens and published by . This book was released on 2011 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Expression Systems written by Michael R. Dyson and published by Methods Express (Hardcover). This book was released on 2007 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protein expression is an increasingly important tool for research on gene function. What is needed is not just a lab manual providing established methods as well as the latest state-of-the-art protocols, but also clear advice on what expression system to choose when. Expression Systems: Methods Expressuniquely fills this need. It covers expression across a broad range of systems, including the following. *Baculovirus expression vectors *CHO cells *E. coli *HEK293-EBNA1 cells *Lactococcus lactis and other gram positive bacteria *S. cerevisiae *transfected insect cells *Pichia pastoris *mammalian cells using BacMam viruses *lentiviral vectors *wheat germ cell-free system The book takes the reader through how to make an informed choice of appropriate system, taking into account the protein target, the time involved, the ultimate use of the expressed protein, and the laboratory equipment required. It also provides step-by-step methods for each system. In addition, the book describes the optimisation of expression strategies, expression engineering using ribosome display, and how to select protein variants with improved expression. Every chapter discusses the merits and limitations of the approaches available, describes the key techniques in full practical detail, and provides sensible advice for immediate use at the bench. In summary, Expression Systems: Methods Expressis a comprehensive laboratory manual and information resource for researchers at all levels, from postgraduate student to principal investigator.
Download or read book Identification of Plasmodium Falciparum Proteins Interacting with the Erythrocyte Membrane Skeleton Protein Spectrin written by Sonja Brigitte Lauterbach and published by . This book was released on 2008 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification of Binding Partners of a Novel P Falciparum Exported Protein written by Mónica Adriana Zapata and published by . This book was released on 2009 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasmodium falciparum is the causative agent of the most severe form of malaria. This parasite drastically modifies its host cell, the erythrocyte, to create a hospitable environment for its growth and reproduction. In order for these modifications to occur, the parasite secretes proteins into the erythrocyte. While the secretion machinery is still unknown, many secreted proteins have been found to have a hydrophobic signal sequence and a novel host-targeting signal downstream of the hydrophobic sequence. A novel P. falciparum protein has been shown to be secreted from the parasitophorous vacuole, yet it lacks both a hydrophobic signal sequence and a host-targeting signal. It was hypothesized that this protein, Pfl2110c, must interact with other proteins as it migrates into the erythrocyte. Using immunofluorescence assays and co-immunoprecipitation experiments, I found that Pfl2110c interacts with several parasite proteins as well as with the erythrocyte cytoskeleton. Therefore, Pfl2110c was renamed skeleton-binding protein 2 (SBP-2).System requirements: World Wide Web browser, and PDF reader.
Download or read book Enzymatic and Chemical Modifications of Erythrocyte Surface Antigens to Identify Plasmodium Falciparum Merozoite Binding Sites written by Kim Lisa Baron and published by . This book was released on 2014 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria is a disease caused by the protozoan parasite Plasmodium where the species that causes the most severe form of malaria in humans is known as Plasmodium falciparum. At least 40% of the global population is at risk of contracting malaria with 627 000 people dying as a result of this disease in 2012. Approximately 90% of all malaria deaths occur in sub-Saharan Africa, where approximately every 30 seconds a young child dies, making malaria the leading cause of death in children under the age of five years old. The malaria parasite has a complex life cycle utilising both invertebrate and vertebrate hosts across sexual and asexual stages. The erythrocyte invasion stage of the life cycle in the human whereby the invasive merozoite form of the parasite enters the erythrocyte is a central and essential step, and it is during this stage that the clinical symptoms of malaria manifest themselves. Merozoites invade erythrocytes utilising multiple, highly specific receptor-ligand interactions in a series of co-ordinated events. The aim of this study was to better understand the interactions occurring between the merozoite and erythrocyte during invasion by using modern, cutting-edge proteomic techniques. This was done in the hope of laying the foundation for the discovery of new key therapeutic targets for antimalarial drug and vaccine-based strategies, as there is currently no commercially available antimalarial vaccine and no drug to which the parasite has not at least started showing resistance. In this study healthy human erythrocytes were treated separately with different protein-altering enzymes and chemicals being trypsin, the potent oxidant sodium periodate (NaIO4), the amine cross-linker tris(2-chloroethyl)amine hydrochloride (TCEA) and the thiol cross-linker 1,11-bis(maleimido)triethylene glycol (BM(PEG)3). The resulting erythrocyte protein alterations were visualised as protein band differences on sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS PAGE), where treated and untreated control erythrocyte ghost protein fingerprints were visually compared to one another. The protein bands showing differences between treated and control samples were in-gel digested using trypsin then sequenced by liquid chromatography tandem mass spectrometry (LC-MS/MS) and identified using proteomics-based software. In this way, the erythrocyte proteins altered by each enzyme/chemical treatment were identified. Malaria invasion assays were performed where each treatment group of erythrocytes as well as the control erythrocytes were incubated separately with schizont stage malaria parasites for the duration of one complete life cycle. Using fluorescent staining and flow cytometry, the invasion inhibition efficiency for each treatment group was evaluated. By utilising these methods, the identification and the relative importance of the erythrocyte proteins involved in the invasion process were determined. Protein fingerprints of control and treated erythrocyte ghosts were visualised and optimised on SDS PAGE where induced protein band differences were successfully identified by LC-MS/MS. It was found that each treatment altered erythrocyte proteins with changes found in Band 3, actin, phosphoglycerate kinase 1, spectrin alpha, spectrin beta, ankyrin, haemoglobin, Bands 4.1 and 4.2, glycophorin A and stomatin. The invasion assays revealed that TCEA inhibited invasion to the greatest extent as compared to the other treatments, followed by BM(PEG)3 and trypsin. Sodium periodate-treated erythrocytes could not be assessed using the invasion assay due to auto-haemolysis. Band 3, glycophorin A, Band 4.1 and stomatin appear to be of higher relative importance in the invasion process as compared to the other altered erythrocyte proteins. These results confirmed the known roles of spectrin alpha, spectrin beta, glycophorin A, Band 3 and Band 4.1 in invasion, and suggested that ankyrin, Band 4.2 and stomatin may also be involved. This study highlighted the potential that modern, cutting-edge proteomic techniques provide when applied to previous comparative studies found in older literature, as previously unidentified proteins that can be involved in invasion were revealed. These results can be used as a foundation in future studies in order to identify new key targets for the development of new antimalarial drug- and vaccine-based strategies, with the hope of preventing the suffering of the millions of malaria-inflicted people worldwide, and ultimately eradicating this deadly disease.
Download or read book Characterization of Novel Surface Proteins of Plasmodium Falciparum and Their Assessment as Molecular Targets for a Malaria Subunit Vaccine written by Anita M. Dreyer and published by . This book was released on 2012 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Malaria Report 2019 written by World Health Organization and published by . This book was released on 2019-08-28 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: The World Malaria Report 2019 provides a comprehensive update on global and regional malaria data and trends. The report tracks investments in malaria programs and research as well as progress across all intervention areas: prevention, diagnosis, treatment, elimination, and surveillance. It also includes dedicated chapters on the consequences of malaria on maternal infant and child health the "High Burden to High Impact" approach as well as biological threats to the fight against malaria. The 2019 report is based on information received from more than 80 countries and areas with ongoing malaria transmission. This information is supplemented by data from national household surveys and databases held by other organizations.
Download or read book World Malaria Report 2015 written by World Health Organization and published by World Health Organization. This book was released on 2016-01-30 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: The World Malaria Report 2015assesses global malaria disease trends and changes in the coverage and financing of malaria control programs between 2000 and 2015. It also summarizes progress towards international targets, and provides regional and country profiles that summarize trends in each WHO region and each country with malaria. The report is produced with the help of WHO regional and country offices, ministries of health in endemic countries, and a broad range of other partners. The data presented are assembled from the 96 countries and territories with ongoing malaria transmission, and a further five countries that have recently eliminated malaria. Most data are those reported for 2014 and 2015, although in some cases projections have been made into 2015, to assess progress towards targets for 2015.
Download or read book Advances in Malaria Research written by Deepak Gaur and published by John Wiley & Sons. This book was released on 2016-12-27 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly reviews our current understanding of malarial biology Explores the subject with insights from post-genomic technologies Looks broadly at the disease, vectors of infection, and treatment and prevention strategies A timely publication with chapters written by global researchers leaders
Download or read book Current Topics in Malaria written by Alfonso J. Rodriguez-Morales and published by . This book was released on 2016-11-30 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for the Treatment of Malaria Third Edition written by World Health Organization and published by World Health Organization. This book was released on 2015-08-13 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria remains an important cause of illness and death in children and adults in countries in which it is endemic. Malaria control requires an integrated approach including prevention (primarily vector control) and prompt treatment with effective antimalarial agents. Malaria case management consisting of prompt diagnosis and effective treatment remains a vital component of malaria control and elimination strategies. Since the publication of the first edition of the Guidelines for the treatment of malaria in 2006 and the second edition in 2010 all countries in which P. falciparum malaria is endemic have progressively updated their treatment policy from use of ineffective monotherapy to the currently recommended artemisinin-based combination therapies (ACT). This has contributed substantially to current reductions in global morbidity and mortality from malaria. Unfortunately resistance to artemisinins has arisen recently in P. falciparum in South-East Asia which threatens these gains. This third edition of the WHO Guidelines for the treatment of malaria contains updated recommendations based on a firmer evidence base for most antimalarial drugs and in addition include recommendation on the use of drugs to prevent malaria in groups at high risk. The Guidelines provide a framework for designing specific detailed national treatment protocols taking into account local patterns of resistance to antimalarial drugs and health service capacity. It provides recommendations on treatment of uncomplicated and severe malaria in all age groups all endemic areas in special populations and several complex situations. In addition on the use of antimalarial drugs as preventive therapy in healthy people living in malaria-endemic areas who are high risk in order to reduce morbidity and mortality from malaria. The Guidelines are designed primarily for policy-makers in ministries of health who formulate country-specific treatment guidelines. Other groups that may find them useful include health professionals and public health and policy specialists that are partners in health or malaria control and the pharmaceutical industry. The treatment recommendations in the main document are brief; for those who wish to study the evidence base in more detail a series of annexes is provided with references to the appropriate sections of the main document.
Download or read book Rodent Malaria written by R. Killick-Kendrick and published by Elsevier. This book was released on 2012-12-02 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rodent Malaria reviews significant findings concerning malaria parasites of rodents, including their taxonomy, zoogeography, and evolution, along with life cycles and morphology; genetics and biochemistry; and concomitant infections. This volume is organized into eight chapters and begins by sketching out the history of the discovery of rodent as well as aspects of parasitology, immunology, and chemotherapy. These concepts are investigated two decades following Ignace Vincke's major discovery and Meir Yoeli's successful establishment of the method of cyclical transmission of the parasite. The following chapters focus on the taxonomy and systematics of the subgenus Vinckeia, with reference to the concepts of species and subspecies of animals and the degree to which they apply to malaria parasites, in particular to those of rodents. The discussion then shifts to how the rodent malaria parasites provide a unique insight into the subcellular organization of Plasmodium species, the use of rodent malaria as an experimental model to study immunological responses, and infectious agents that interact with malaria parasites. The book concludes with a chapter on malaria chemotherapy, with emphasis on the value of rodent malaria in antimalarial drug screening and the use of antimalarial drugs as biological probes. This book will be of interest to protozoologists and physicians as well as those from other disciplines including biochemistry, immunology, pharmacology, cell biology, and genetics.
