Download or read book Studies on the Structure and Function of the Major Merozoite Surface Protein MSP1 of the Malaria Parasite Plasmodium Falciparum written by Jonathan Andrew Chappel and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Malaria Parasites written by Andrew P. Waters and published by Caister Academic Press Limited. This book was released on 2004 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: The completion of the Plasmodium falciparum genome sequence in late 2002 heralded a new era in malaria research. The search began in earnest for new drugs and vaccines to combat malaria, a disease which afflicts up to 500 million people worldwide and is responsible for the deaths of more than one million people each year. The new genomic data is aiding a greater understanding of the living parasite and its interaction with the insect vector and human host. In this book internationally renowned experts provide up-to-date reviews of the most important aspects of post-genomic malaria research. Topics covered include: the P. falciparum genome and model parasites, bioinformatics and genome databases, microsatellite analysis, analysis of chromosome structure, cell cycle to RNA polymerase I and II mediated gene expression, role of the nuclear genome, the parasite surface and cell biology, and much more. The book is essential to all researchers working in this highly topical field and is recommended reading for scientists in other areas of biology and medicine.
Download or read book Total Synthesis and Expression of the Msp 1 Gene of Malaria Parasite Plasmodium Falciparum Encoding the Merozoite Surface Protein 1 of the FCB 1 Strain written by Weiqing Pan and published by . This book was released on 1999 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Proteases in the Primary Processing of Plasmodium Falciparum Merozoite Surface Protein 1 MSP 1 written by Noor Rain Abdullah and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Plasmodium falciparum merozoite surface protein-1 (MSP-1), a protein of 195 kDa undergoes primary processing at of before schizont rupture to give 4 polypeptides of 83 kDa, 30 kDa, 38 kDa and 42 kDa. It is believed that the proteases involved in that proteolytic processing are parasite derived and may be present in the parasitophorous vacuole at the time when schizont rupture to release merozoites occurs. The aim of the study was to characterize these proteases.
Download or read book Heat Shock Proteins of Malaria written by Addmore Shonhai and published by Springer Science & Business Media. This book was released on 2013-09-20 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the role of heat shock proteins in the life cycle of malaria parasites. The work includes a general introduction on the structural and functional features of heat shock proteins. The main focus is on the role of heat shock protein families from Plasmodium falciparum, their role in protein folding and in the development of malaria pathology. The functions of individual families of heat shock proteins from plasmodium species and their cooperation in functional networks is described. Subcellular and extracellular organelles such as the apicoplast and the Maurer’s Clefts which are associated with plasmodium species, are discussed in detail. The role of heat shock proteins in the development and function of these organelles structures are highlighted. Although conceding that heat shock proteins may not be ideal antimalarial drug targets, prospects of targeting heat shock proteins in antimalarial drug discovery either directly and/or in combination therapies are explored.
Download or read book Proteolytic Processing of the Merozoite Surface Protein 1 from Plasmodium Falciparum Implications on Its Structure and Function During Invasion written by Nadine Hertrich and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drug Targets for Plasmodium Falciparum Historic to Future Perspectives written by Mohammed Tarique and published by Springer Nature. This book was released on with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Merozoite Surface Protein 2 Has a Potential Role in Plasmodium Falciparum Invasion of Erythrocytes written by Jesse Schloegel and published by . This book was released on 2008 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Merozoite surface protein 2 (PfMSP2) is currently being assessed as a component of a vaccine designed to protect against disease caused by the malaria parasite Plasmodium falciparum. The PfMSP2 gene sequence predicts an approximately 26 kDa antigen that is anchored to the merozoite surface by a glycosyl-phosphatidyl-inositol moiety. PfMSP2 is an intrinsically unstructured protein, which has recently been shown to self associate to form ordered oligomeric species, which possess many characteristics of amyloid fibrils. This project demonstrates that polymeric but not monomeric recombinant MSP2 can bind to human erythrocytes. The interaction between MSP2 and the erythrocyte surface is reduced upon treating the cells with trypsin, chymotrypsin, and heparatinase I, a finding consistent with the involvement of a heparan sulphate-containing proteoglycan on the erythrocyte surface. In contrast, treatment of erythrocytes with neuraminidase slightly improved MSP2 binding. The interaction between polymeric MSP2 and erythrocytes is similar to the interaction between Abeta 42 amyloid and erythrocytes. These results raise the possibility that oligomeric forms of MSP2 related to amyloid fibrils on the merozoite surface may facilitate merozoite attachment prior to invasion of the host erythrocytes.
Download or read book An Alternative Secretory Pathway in the Malaria Parasite Plasmodium falciparum written by Thuvaraka Thavayogarajah and published by GRIN Verlag. This book was released on 2017-08-31 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doctoral Thesis / Dissertation from the year 2014 in the subject Biology - Diseases, Health, Nutrition, grade: 1.3, University of Marburg (European virtual Institute for Malaria Research), language: English, abstract: This study focuses on the discovery of an alternative secretory pathway to the ER/Golgi route in the malaria parasite P. falciparum in infected RBCs. Two proteins appeared to be promising candidates of an alternative secretory pathway: the PfADP-ribosylation factor 1 (ARF1) and the Pfadenylate kinase 2 (AK2). Both proteins contained an N-myristoylation site at their N-terminus, which is indicative for N-myristoylation. N-myristoylation is a co-translational modification of a protein, whereby a fatty acid (myristate) is irreversibly attached to the glycine residue at the N-terminus of a protein via the PfN-myristoyltransferase (NMT). A preceding proteomic analysis of the parasitophorous vacuole and a reporter construct study proposed for both PfARF1 (determined by a proteomic study) and PfAK2 (determined by a reporter construct study) PV localization although both proteins lacked a signal peptide. That’s why it was hypothesized whether or not N-myristoylation would drive protein secretion across the parasite plasma membrane (PPM). The subcellular localization of the PfARF1/GFP parasites and the PfAK2/GFP parasites, respectively, were analyzed via epifluorescence microscopy and biochemical methods. In parallel, another batch of reporter constructs were generated and analyzed, where the N-myristoylation site of PfARF1 (this study) and PfAK2 (Ma et al., 2012), respectively, was removed (PfARF1G2A/GFP and PfAK2G2A/GFP). Live cell imaging showed that the fusion protein ARF1/GFP was localized as dot-like structures in the parasite. In contrast, the phenotype of the fusion protein of the PfARF1G2A/GFP parasites showed an evenly distributed signal in the parasite cytosol. Further analysis of the subcellular localization of the PfARF1 strongly supports its localization to compartments of the early secretory pathway of the parasite, but no localization in the PV. In contrast, the fusion protein PfAK2/GFP localized to a ring-like structure around the parasite indicating PV localization. The PfAK2G2A/GFP parasites showed a cytosolic localization of the fusion protein (Ma et al., 2012). Biochemical analyses revaled that the fusion protein PfAK2/GFP was secreted into the PV when the N-myristoylation site was present. Furthermore, it could be shown that the N-terminus of the PfAK2 protein is sufficient for parasite plasma membrane targeting, stable membrane anchoring and subsequent protein translocation across the PPM.
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.
Download or read book Studies on Protective Efficacy of Plasmodium Falciparum Merozoite Surface Proteins in Murine Malaria Model written by Łukasz Ked̨zierski and published by . This book was released on 2000 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Production of a Recombinant E Coli Expressed Malarial Vaccine from the C Terminal Fragment of Plasmodium Falciparum 3D7 Merozoite Surface Protein 1 written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: P. falciparum Merozoite Surface Protein-1 (MSP-1) is a leading erythrocytic stage vaccine candidate. Following secondary proteolytic processing, it may play a role in binding and/or invasion of erythrocytes. The secondary processing gives a 33kD and 19kD fragment. The MSP1-19 is a target for parasite inhibitory antibodies and protective immunity. However, it appears to lack T-helper epitopes. Since antibody is likely the effector mechanism induced by MSP1-19, it is important to insure that recombinant vaccines based on this antigen be folded correctly and contain T-helper epitopes that will enhance induction of humoral responses. We have developed recombinant MSP1-42 molecules that are structurally correct based on positive reactivities with conformation-dependent mAbs. These proteins have been produced to greater than 95% purity and exceed FDA endotoxin standards. Immunogenicity studies in mice and Rhesus monkeys reveal that good antibody responses are induced to MSP1-42 when these animals are immunized with the MSP1-42 plus SBAS2 adjuvant.
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 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 Merozoite Surface Protein 1 of Plasmodium Falciparum written by Clara S. Lin and published by . This book was released on 2016 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Production of a Recombinant E Coli Expressed Malaria Vaccine from the C Terminal Fragment of Piasmodium Falciparum 3D7 Merozoite Surface Protein 1 written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malarial blood stage antigens can produce humoral immunity by induction of protective antibodies to epitopes on surface antigens on parasites. The merozoite surface protein-1 (MSP1) of P. falciparum is a major blood-stage vaccine candidate. MSP1 may play a role in binding and/or infection of erythrocytes by merozoites (parasites) during red blood cell invasion. The C-terminal fragment of MSP1, MSP1(sub 19), is highly conserved among all known strains of P. falciparum. immunization with recombinant proteins that have native-like conformations may elicit long-lasting protective immunity that mimics the natural immunity. We have used bacterial expression to tightly regulate transcription and translation of MSP1(sub 42). Plasmids that encode MSP1(sub 42) were prepared and tested for their ability to express recombinant protein. A three column purification scheme that included Ni(+2) metal chelate chromatography, anion and then cation exchange chromatography, yielded greater than 95% pure MSP1(sub 42). Immunoreactivity with mAbs showed that recombinant MSP1(sub 42) was conformationally similar to native MSP1. The objectives were to develop recombinant MSP1(sub 42) molecules that were structurally correct, to develop fermentation and purification processes that could be scaled-up for large-scale processes, and ultimately, to advance these products into human clinical trials.
