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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Malaria--Prevention. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (614 pages)
    Edition: 1st ed.
    ISBN: 9781118493830
    Language: English
    Note: Intro -- Title Page -- Copyright Page -- Contents -- List of contributors -- Foreword -- Preface -- Chapter 1 Introduction: An overview of malaria and Plasmodium -- History -- The life cycle of Plasmodium -- A significant milestone in malaria research: Adaptation of Plasmodium to laboratory culture -- The advent of present-day technologies and their applications in malaria research -- Bibliography -- Chapter 2 Exoerythrocytic development of Plasmodium parasites -- The sporozoite's journey from the skin to the liver -- Sporozoite invasion -- Parasite development -- Protein export from the parasite into the host cell -- Parasite egress -- The role of innate immune responses during merosome formation -- Acknowledgments -- Bibliography -- Chapter 3 Molecular basis of erythrocyte invasion by Plasmodium merozoites -- The structure of the merozoite -- The steps of erythrocyte invasion -- Step 1: Initial attachment of the merozoite to the erythrocyte surface -- Step 2: Apical reorientation -- Step 3: Formation of the junction -- Redundancy and ligand-receptor interactions that mediate parasite adhesion during erythrocyte invasion -- Duffy binding-like family -- Reticulocyte binding-like (RBL) family -- Cooperativity between the DBL and RBL families of proteins -- Identification of novel parasite ligands -- Signaling events during erythrocyte invasion by malaria parasites -- Summary and conclusions -- Bibliography -- Chapter 4 The biology of malaria transmission -- Purpose -- History -- The current research agenda -- Biology -- Parasite -- Vector -- Vertebrate host -- Population dynamics -- Parasite dynamics in the mosquito -- Transmission-blocking interventions -- Anti-vector strategies -- Anti-parasitic transmission-blocking interventions -- Bibliography -- Chapter 5 Comparative and functional genomics of malaria parasites. , An Introduction to Plasmodium genomes -- Genome structure of malaria parasites -- Base content -- Genome size and composition -- Chromosome structure -- Lineage-specific gene families -- From genome sequences to gene function -- Genetic mapping -- Population genomics to identify vaccine or drug targets -- Global analysis of transcripts -- Epigenomics -- Reverse genetics and parasite transformation -- Summary -- Acknowledgments -- Bibliography -- Chapter 6 Gene regulation: New insights and possible intervention strategies -- Introduction -- Modes of gene regulation -- Epigenetic mechanisms of gene regulation -- Transcription factors and other DNA-binding proteins -- Alternative splicing -- Post-transcriptional, translational, and post-translational gene regulation -- Drug targeting -- Histone acetyltransferases (HATs) -- Histone deacetylases (HDACs) -- Histone methyltransferases -- Histone demethylases -- Histone kinases -- Histone post-translational modification readers -- DNA methyltransferases -- Perspectives -- Bibliography -- Chapter 7 Molecular genetic approaches to malaria research -- Transfection methods -- Transient transfection -- Stable transfection -- Bxb1 integrase system -- Genetic approaches for deriving gene function -- Single crossover integration -- Double-crossover integration -- Knockin mutations -- Engineering genetic mutations -- Forward genetic screens -- Conditional knockdown of protein function -- Cre/loxP recombinase: deletion of DNA sequences -- Tet system - conditional transcriptional regulation -- Riboenzymes: conditional transcript degradation -- FKBP DD system: conditional protein degradation -- DHFR DD system: conditional protein degradation -- Aggregation domain: conditional blockage of protein trafficking -- Protein reporters -- Localization tags -- Luciferases -- Conclusions -- Bibliography. , Chapter 8 Transcriptomics and proteomics -- Transcriptional profiling throughout the parasite life cycle -- Intraerythrocytic developmental cycle -- Sexual development and exoerythrocytic stages -- Transcriptional regulation -- Basal transcriptional machinery and transcription factors -- Promoters -- Epigenetic mechanisms -- Non-coding RNAs -- Transcriptional variation -- Variatome -- In vivo -- Transcriptional changes in response to outside stimuli -- Growth perturbations as a tool for gene annotation -- Transcription and drug resistance -- Biological insights -- Proteomics -- Translational regulation -- Post-translational modifications -- Organellar translation -- Proteome changes in response to drugs -- Conclusion -- Bibliography -- Chapter 9 The biochemistry of Plasmodium falciparum: An updated overview -- MPMP -- Carbohydrates -- Glycolysis -- Pentose phosphate pathway -- Pyruvate metabolism -- Glyoxalase metabolism -- Aminosugar metabolism -- Lipid metabolism -- Fatty acid biosynthesis -- Phosphatidylcholine -- Phosphatidylserine and phosphatidylethanolamine -- Phosphatidylinositol -- Sphingomyelin -- Isoprenoid -- Terpenoid -- Dolichol -- Glycosylphosphatidylinositols (GPIs) -- Amino acids -- Methionine and polyamine metabolism -- Arginine and proline metabolism -- Aspartate and asparagine metabolism -- Glutamate and glutamine metabolism -- Glycine and serine metabolism -- Leucine: isoleucine and valine metabolism -- Phenylalanine and tyrosine metabolism -- Lysine metabolism -- Selenocysteine -- Nucleotide metabolism -- Purine biosynthesis -- Pyrimidine biosynthesis -- Cofactors -- CoA biosynthesis -- Nicotinate and nicotinamide -- Riboflavin biosynthesis -- Thiamine (Vitamin B1) -- Pyridoxal phosphate (Vitamin B6) -- Ubiquinone biosynthesis -- Porphyrin biosynthesis -- Shikimate metabolism -- Folate metabolism -- Redox metabolism. , Mitochondrial functions -- Mitochondrial electron flow -- Mitochondrial TCA cycle -- Acetyl-CoA production in the mitochondrion -- Hemoglobin digestion and hemozoin production -- Some reflections for the future -- Bibliography -- Chapter 10 Signaling in malaria parasites -- Protein phosphorylation in Plasmodium -- Calcium-mediated signaling in Plasmodium -- Calcium homeostasis and its role in the parasite life cycle -- Calcium-dependent protein kinases and other calcium effectors in malaria parasites -- Phosphoinositide signaling and trafficking in malaria parasites -- Phosphoinositide metabolism in the parasite -- The role of phosphoinositides in the parasite life cycle -- Cyclic nucleotide signaling in the malaria parasite -- cAMP and cGMP generation in the parasite -- Role of cAMP in parasite development -- PfPKA, a major effector of cAMP signaling in the parasite -- cGMP in parasite development -- PKG, a key regulator of cGMP-mediated signaling in the parasite -- Future challenges -- Bibliography -- Chapter 11 Membrane transport proteins as therapeutic targets in malaria -- Host erythrocyte membrane: A shared ion and nutrient channel -- Parasitophorous vacuolar membrane: Protein export and solute uptake -- Protein export -- Solute exchange -- Parasite plasma membrane: Similar to other eukaryotic cells, but different -- Aquaglyceroporin -- Hexose transporter -- Digestive vacuole: A specialized lysosome‐equivalent in the parasite -- Mitochondrial inner membrane: An unusual ATP synthase with uncertain function -- Conclusions -- Acknowledgments -- Bibliography -- Chapter 12 The proteolytic repertoire of malaria parasites -- Aspartic proteases -- Plasmepsins -- Presenilin-like protease -- Cysteine proteases -- Falcipains -- Dipeptidyl aminopeptidases -- Calpain -- Serine repeat antigen (SERA) -- Metalloproteases -- Alanyl aminopeptidase -- Falcilysin. , Leucyl aminopeptidase -- Aspartyl aminopeptidase -- Methionyl aminopeptidase -- Serine proteases -- Subtilisins -- Rhomboid proteases -- Threonine proteases -- The proteasome -- Roles of proteases in parasite development -- Parasite egress and invasion of host cells -- Hemoglobin degradation -- Summary and conclusions -- Acknowledgments -- Bibliography -- Chapter 13 Development of medicines for the control and elimination of malaria -- Targets for the development of future medicines for malaria -- Drug development and the elimination agenda -- The importance of partnerships in drug discovery and development -- The process of drug development -- Combination medicines -- Identifying new antimalarial compounds -- The drug-development process -- Protecting new medicines from the emergence of resistance -- Advances in drug development made in the 21st century -- High-throughput phenotypic screening -- How fast compounds work: the parasite reduction ratio -- Pharmacokinetic and pharmacodynamic modeling -- Challenge models as proof of concept in humans -- The need for new in vitro and in vivo models for P. vivax -- The global pipeline of new medicines for treating malaria -- Next-generation endoperoxides -- Beyond the endoperoxides: overview of the pipeline -- Medicines in the broader context of malaria eradication -- Chemoprevention in vulnerable populations -- Vaccines for the chemoprevention of malaria -- Conclusion -- Acknowledgments -- Bibliography -- Chapter 14 Antimalarial drug resistance -- Background -- Treatment failure and drug resistance -- Current status -- Public health burden -- Causes of drug resistance -- Factors related to emergence -- Mechanisms of resistance -- Evolution and spread -- Detection of drug resistance -- In vivo monitoring -- In vitro sensitivity -- Molecular markers -- The future of detection -- Managing drug resistance. , Strategies for prevention.
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 8 (1993), S. 0 
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Strains of Pseudomonas aeruginosa causing pulmonary infections in cystic fibrosis patients have an unusual mucoid phenotype because of production of the capsule-like exopolysaccharide, alginate. Transcriptional activation of algD, the first gene of a large alginate biosynthetic gene cluster, is associated with conversion to the alginate-producing (Alg+) phenotype. In this study, we examined the regulation of alginate genes immediately downstream of algD. Mutants of the Alg+ strain FRD1 were constructed by gene replacement with defined Tn501 (8.2 kb) insertions in the alginate biosynthetic gene cluster, resulting in an Alg− phenotype. The Alg+ phenotype of these mutants was restored by integration of narrow-host-range plasmids containing DNA fragments from P. aeruginosa that reconstructed a continuous alginate gene cluster. A broad-host-range plasmid containing the entire alginate gene cluster except for the terminal gene, algA was unable to complement an aIG::Tn501 mutant unless algA was transcribed from a second plasmid. This indicated that any Tn501 insertion in the cluster was polar on downstream alginate genes. Northern blot hybridization experiments also showed that a transposon insertion downstream of algD adversely affected algG and algA transcription. These results provided evidence that the alginate biosynthetic gene cluster has an operonic structure and is cotranscribed from the algD promoter.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Plasmodium vivax depends on interaction with the Duffy antigen/receptor for chemokines (DARC) for invasion of human erythrocytes. The 140 kDa P. vivax Duffy-binding protein (PvDBP) mediates interaction with DARC. The receptor-binding domain of PvDBP maps to its N-terminal, cysteine-rich region, region II (PvRII), which contains approximately 300 amino acid residues including 12 conserved cysteines. Using surface plasmon resonance, we show that binding of PvRII to DARC is a high-affinity interaction with a binding constant (KD) of 8.7 nM. The minimal binding domain of PvRII has been previously mapped to a central 170-amino-acid stretch that includes cysteines 5–8. Here, we have used site-directed mutagenesis and quantitative binding assays to map amino acid residues within PvRII that make contact with DARC. Of the seven alanine replacement mutations that had an effect on binding, five were mutations in hydrophobic residues suggesting that hydrophobic interactions play a major role in the interaction of PvDBP with DARC. Genetic diversity studies have shown that six of the seven binding residues identified in PvRII are conserved in P. vivax field isolates, which provides support for their role in interaction with DARC.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Adhesion of human erythrocytes infected with the malaria parasite Plasmodium falciparum to host endothelium has been associated with severe forms of this disease. A number of endothelial receptors have been identified, and there is evidence that one of these, intercellular adhesion molecule-1 (ICAM-1), may play an important role in the pathology of cerebral malaria. Mutagenesis of domain 1 of ICAM-1, which is involved in parasite adhesion, shows that the binding sites for different parasite variants overlap to a large extent, but that there are subtle differences between them that correlate with their adhesive phenotypes. This suggests that the ability to bind to ICAM-1 has arisen from a common variant, but that subsequent changes have led to differences in binding avidity, which may affect pathogenesis. The definition of common binding determinants and the elucidation of links between ICAM-1 binding phenotype and disease will provide new leads in the design of therapeutic interventions.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Molecular processes that govern pathogenic features of erythrocyte invasion and cytoadherence in malaria are reliant on Plasmodium-specific Duffy-binding-like domains (DBLs). These cysteine-rich modules recognize diverse host cell-surface receptors during pathogenesis. DBLs of parasite ...
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Red cell invasion by Plasmodium merozoites involves multiple steps such as attachment, apical reorientation, junction formation and entry into a parasitophorous vacuole. These steps are mediated by specific molecular interactions. P. vivax and the simian parasite P. knowlesi require interaction with the Duffy blood group antigen to invade human erythrocytes. P. vivax and P. knowlesi Duffy binding proteins (PvDBP and PkDBP), which bind the Duffy antigen during invasion, share regions of sequence homology and belong to a family of erythrocyte binding proteins (EBPs). By deletion of the gene that encodes PkDBP, we demonstrate that interaction of PkDBP with the Duffy antigen is absolutely necessary for invasion of human erythrocytes by P. knowlesi. Electron microscopy studies reveal that PkDBP knockout parasites are unable to form a junction with human erythrocytes. The interaction of PkDBP with the Duffy antigen is thus necessary for the critical step of junction formation during invasion. These studies provide support for development of intervention strategies that target EBPs to inhibit junction formation and block erythrocyte invasion by malaria parasites.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Plasmodium vivax is one of four Plasmodium species that cause human malaria. P. vivax and a related simian malaria parasite, Plasmodium knowlesi, invade erythrocytes by binding the Duffy antigen/receptor for chemokines (DARC) through their respective Duffy binding proteins. Here we show that tyrosines 30 and 41 of DARC are modified by addition of sulphate groups, and that the sulphated tyrosine 41 is essential for association of the Duffy binding proteins of P. vivax (PvDBP) and P. knowlesi (PkDaBP) with DARC-expressing cells. These sulphated tyrosines also participate in the association of DARC with each of its four known chemokine ligands. Alteration of tyrosine 41 to phenylalanine interferes with MCP-1, RANTES and MGSA association with DARC, but not with that of IL8. In contrast, alteration of tyrosine 30 to phenylalanine interferes with the association of IL8 with DARC. A soluble sulphated amino-terminal domain of DARC, but not one modified to phenylalanine at residue 41, can be used to block the association of PvDBP and PkDaBP with red blood cells, with an IC50 of approximately 5 nM. These data are consistent with a role for tyrosine sulphation in the association of many or most chemokines with their receptors, and identify a key molecular determinant of erythrocyte invasion by P. vivax.
    Type of Medium: Electronic Resource
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