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  • 1
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    Constitutive activation of toll-mediated antifungal defense in serpin-deficient Drosophila (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-18
    Description: The antifungal defense of Drosophila is controlled by the spaetzle/Toll/cactus gene cassette. Here, a loss-of-function mutation in the gene encoding a blood serine protease inhibitor, Spn43Ac, was shown to lead to constitutive expression of the antifungal peptide drosomycin, and this effect was mediated by the spaetzle and Toll gene products. Spaetzle was cleaved by proteolytic enzymes to its active ligand form shortly after immune challenge, and cleaved Spaetzle was constitutively present in Spn43Ac-deficient flies. Hence, Spn43Ac negatively regulates the Toll signaling pathway, and Toll does not function as a pattern recognition receptor in the Drosophila host defense.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levashina, E A -- Langley, E -- Green, C -- Gubb, D -- Ashburner, M -- Hoffmann, J A -- Reichhart, J M -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1917-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉UPR 9022 CNRS, Institut de Biologie Moleculaire et Cellulaire, 15 Rue Rene Descartes, Strasbourg 67084, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489372" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antifungal Agents/*metabolism ; *Antimicrobial Cationic Peptides ; Body Patterning ; Drosophila/embryology/genetics/*immunology ; *Drosophila Proteins ; Escherichia coli/genetics/immunology ; Genes, Insect ; Hemolymph/metabolism ; Insect Proteins/*biosynthesis/genetics/metabolism/*physiology ; Membrane Glycoproteins/genetics/*physiology ; Micrococcus luteus/immunology ; Molecular Sequence Data ; Mutagenesis ; Peptides/genetics/metabolism ; *Receptors, Cell Surface ; Recombinant Fusion Proteins/genetics/metabolism ; Serine Proteinase Inhibitors/genetics/*metabolism ; Serpins/genetics/*metabolism ; Signal Transduction ; Toll-Like Receptors ; Up-Regulation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Immunity-related genes and gene families in Anopheles gambiae (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-10-05
    Description: We have identified 242 Anopheles gambiae genes from 18 gene families implicated in innate immunity and have detected marked diversification relative to Drosophila melanogaster. Immune-related gene families involved in recognition, signal modulation, and effector systems show a marked deficit of orthologs and excessive gene expansions, possibly reflecting selection pressures from different pathogens encountered in these insects' very different life-styles. In contrast, the multifunctional Toll signal transduction pathway is substantially conserved, presumably because of counterselection for developmental stability. Representative expression profiles confirm that sequence diversification is accompanied by specific responses to different immune challenges. Alternative RNA splicing may also contribute to expansion of the immune repertoire.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Christophides, George K -- Zdobnov, Evgeny -- Barillas-Mury, Carolina -- Birney, Ewan -- Blandin, Stephanie -- Blass, Claudia -- Brey, Paul T -- Collins, Frank H -- Danielli, Alberto -- Dimopoulos, George -- Hetru, Charles -- Hoa, Ngo T -- Hoffmann, Jules A -- Kanzok, Stefan M -- Letunic, Ivica -- Levashina, Elena A -- Loukeris, Thanasis G -- Lycett, Gareth -- Meister, Stephan -- Michel, Kristin -- Moita, Luis F -- Muller, Hans-Michael -- Osta, Mike A -- Paskewitz, Susan M -- Reichhart, Jean-Marc -- Rzhetsky, Andrey -- Troxler, Laurent -- Vernick, Kenneth D -- Vlachou, Dina -- Volz, Jennifer -- von Mering, Christian -- Xu, Jiannong -- Zheng, Liangbiao -- Bork, Peer -- Kafatos, Fotis C -- New York, N.Y. -- Science. 2002 Oct 4;298(5591):159-65.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12364793" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Animals ; Anopheles/*genetics/*immunology/metabolism/microbiology/parasitology ; Apoptosis ; Bacteria/immunology ; Catechol Oxidase/metabolism ; Computational Biology ; Drosophila Proteins/chemistry/genetics/metabolism ; Drosophila melanogaster/genetics/immunology/metabolism ; Enzyme Precursors/metabolism ; Gene Expression Regulation ; *Genes, Insect ; Genome ; Immunity, Innate ; Insect Proteins/chemistry/genetics/metabolism ; Multigene Family ; Peptides/metabolism ; Phylogeny ; Plasmodium/immunology/physiology ; Protein Structure, Tertiary ; Selection, Genetic ; Serine Endopeptidases/metabolism ; Serpins/metabolism ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Evolutionary dynamics of immune-related genes and pathways in disease-vector mosquitoes (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-06-26
    Description: Mosquitoes are vectors of parasitic and viral diseases of immense importance for public health. The acquisition of the genome sequence of the yellow fever and Dengue vector, Aedes aegypti (Aa), has enabled a comparative phylogenomic analysis of the insect immune repertoire: in Aa, the malaria vector Anopheles gambiae (Ag), and the fruit fly Drosophila melanogaster (Dm). Analysis of immune signaling pathways and response modules reveals both conservative and rapidly evolving features associated with different functional gene categories and particular aspects of immune reactions. These dynamics reflect in part continuous readjustment between accommodation and rejection of pathogens and suggest how innate immunity may have evolved.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2042107/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2042107/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waterhouse, Robert M -- Kriventseva, Evgenia V -- Meister, Stephan -- Xi, Zhiyong -- Alvarez, Kanwal S -- Bartholomay, Lyric C -- Barillas-Mury, Carolina -- Bian, Guowu -- Blandin, Stephanie -- Christensen, Bruce M -- Dong, Yuemei -- Jiang, Haobo -- Kanost, Michael R -- Koutsos, Anastasios C -- Levashina, Elena A -- Li, Jianyong -- Ligoxygakis, Petros -- Maccallum, Robert M -- Mayhew, George F -- Mendes, Antonio -- Michel, Kristin -- Osta, Mike A -- Paskewitz, Susan -- Shin, Sang Woon -- Vlachou, Dina -- Wang, Lihui -- Wei, Weiqi -- Zheng, Liangbiao -- Zou, Zhen -- Severson, David W -- Raikhel, Alexander S -- Kafatos, Fotis C -- Dimopoulos, George -- Zdobnov, Evgeny M -- Christophides, George K -- 1 R01 AI059492-01A1/AI/NIAID NIH HHS/ -- 5 R01 AI61576-2/AI/NIAID NIH HHS/ -- G0300170/Medical Research Council/United Kingdom -- GM41247/GM/NIGMS NIH HHS/ -- GR077229MA/Wellcome Trust/United Kingdom -- P01 AI044220-06A1/AI/NIAID NIH HHS/ -- R01 AI037083/AI/NIAID NIH HHS/ -- R01 GM058634/GM/NIGMS NIH HHS/ -- R01 GM058634-09/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Jun 22;316(5832):1738-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Cell and Molecular Biology, Faculty of Natural Sciences, Imperial College London, London SW7 2AZ, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17588928" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*genetics/immunology ; Animals ; Anopheles/*genetics/immunology ; Antimicrobial Cationic Peptides/physiology ; Carrier Proteins/genetics/physiology ; Drosophila melanogaster/genetics/immunology ; *Evolution, Molecular ; Genes, Insect ; Immunity, Innate/*genetics ; Insect Proteins/genetics/physiology ; Insect Vectors/*genetics/immunology ; Malaria/transmission ; Melanins/metabolism ; Multigene Family ; Signal Transduction ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Dissecting the genetic basis of resistance to malaria parasites in Anopheles gambiae (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-03
    Description: The ability of Anopheles gambiae mosquitoes to transmit Plasmodium parasites is highly variable between individuals. However, the genetic basis of this variability has remained unknown. We combined genome-wide mapping and reciprocal allele-specific RNA interference (rasRNAi) to identify the genomic locus that confers resistance to malaria parasites and demonstrated that polymorphisms in a single gene encoding the antiparasitic thioester-containing protein 1 (TEP1) explain a substantial part of the variability in parasite killing. The link between TEP1 alleles and resistance to malaria may offer new tools for controlling malaria transmission. The successful application of rasRNAi in Anopheles suggests that it could also be applied to other organisms where RNAi is feasible to dissect complex phenotypes to the level of individual quantitative trait alleles.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2959166/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2959166/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blandin, Stephanie A -- Wang-Sattler, Rui -- Lamacchia, Marina -- Gagneur, Julien -- Lycett, Gareth -- Ning, Ye -- Levashina, Elena A -- Steinmetz, Lars M -- R01 GM068717/GM/NIGMS NIH HHS/ -- R01 GM068717-08/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 2;326(5949):147-50. doi: 10.1126/science.1175241.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, 69117 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19797663" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Animals ; Anopheles gambiae/*genetics/immunology/metabolism/*parasitology ; Chromosome Mapping ; *Genes, Insect ; Genome, Insect ; Immunity, Innate ; Insect Proteins/*genetics/*metabolism ; Insect Vectors/genetics/immunology/metabolism/parasitology ; Mice ; Models, Molecular ; Molecular Sequence Data ; Phenotype ; Plasmodium berghei/immunology/*physiology ; *Polymorphism, Genetic ; Quantitative Trait Loci ; RNA Interference
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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