Publications
2006
Leclerc Vincent, Pelte Nadège, Chamy Laure El, Martinelli Cosimo, Ligoxygakis Petros, Hoffmann Jules A, Reichhart Jean-Marc
Prophenoloxidase activation is not required for survival to microbial infections in Drosophila Article de journal
Dans: EMBO Rep., vol. 7, no. 2, p. 231–235, 2006, ISSN: 1469-221X.
Résumé | Liens | BibTeX | Étiquettes: Animals, Bacterial Infections, Catechol Oxidase, Enzyme Activation, Enzyme Precursors, Gram-Negative Bacteria, Gram-Positive Bacteria, Hemolymph, hoffmann, Immunity, Innate, M3i, Mutation, reichhart, Survival Rate
@article{leclerc_prophenoloxidase_2006,
title = {Prophenoloxidase activation is not required for survival to microbial infections in Drosophila},
author = {Vincent Leclerc and Nadège Pelte and Laure El Chamy and Cosimo Martinelli and Petros Ligoxygakis and Jules A Hoffmann and Jean-Marc Reichhart},
doi = {10.1038/sj.embor.7400592},
issn = {1469-221X},
year = {2006},
date = {2006-02-01},
journal = {EMBO Rep.},
volume = {7},
number = {2},
pages = {231--235},
abstract = {The antimicrobial defence of Drosophila relies on cellular and humoral processes, of which the inducible synthesis of antimicrobial peptides has attracted interest in recent years. Another potential line of defence is the activation, by a proteolytic cascade, of phenoloxidase, which leads to the production of quinones and melanin. However, in spite of several publications on this subject, the contribution of phenoloxidase activation to resistance to infections has not been established under appropriate in vivo conditions. Here, we have isolated the first Drosophila mutant for a prophenoloxidase-activating enzyme (PAE1). In contrast to wild-type flies, PAE1 mutants fail to activate phenoloxidase in the haemolymph following microbial challenge. Surprisingly, we find that these mutants are as resistant to infections as wild-type flies, in the total absence of circulating phenoloxidase activity. This raises the question with regard to the precise function of phenoloxidase activation in defence, if any.},
keywords = {Animals, Bacterial Infections, Catechol Oxidase, Enzyme Activation, Enzyme Precursors, Gram-Negative Bacteria, Gram-Positive Bacteria, Hemolymph, hoffmann, Immunity, Innate, M3i, Mutation, reichhart, Survival Rate},
pubstate = {published},
tppubtype = {article}
}
2005
Irving Phil, Ubeda Jean-Michel, Doucet Daniel, Troxler Laurent, Lagueux Marie, Zachary Daniel, Hoffmann Jules A, Hetru Charles, Meister Marie
New insights into Drosophila larval haemocyte functions through genome-wide analysis Article de journal
Dans: Cell. Microbiol., vol. 7, no. 3, p. 335–350, 2005, ISSN: 1462-5814.
Résumé | Liens | BibTeX | Étiquettes: Animals, bioinformatic, Catechol Oxidase, Cell Lineage, Enzyme Precursors, Escherichia coli, Fat Body, Gene Expression Profiling, Genome, Hemocytes, hoffmann, Integrin alpha Chains, Integrins, Larva, M3i, Micrococcus luteus
@article{irving_new_2005,
title = {New insights into Drosophila larval haemocyte functions through genome-wide analysis},
author = {Phil Irving and Jean-Michel Ubeda and Daniel Doucet and Laurent Troxler and Marie Lagueux and Daniel Zachary and Jules A Hoffmann and Charles Hetru and Marie Meister},
doi = {10.1111/j.1462-5822.2004.00462.x},
issn = {1462-5814},
year = {2005},
date = {2005-03-01},
journal = {Cell. Microbiol.},
volume = {7},
number = {3},
pages = {335--350},
abstract = {Drosophila blood cells or haemocytes comprise three cell lineages, plasmatocytes, crystal cells and lamellocytes, involved in immune functions such as phagocytosis, melanisation and encapsulation. Transcriptional profiling of activities of distinct haemocyte populations and from naive or infected larvae, was performed to find genes contributing to haemocyte functions. Of the 13 000 genes represented on the microarray, over 2500 exhibited significantly enriched transcription in haemocytes. Among these were genes encoding integrins, peptidoglycan recognition proteins (PGRPs), scavenger receptors, lectins, cell adhesion molecules and serine proteases. One relevant outcome of this analysis was the gain of new insights into the lamellocyte encapsulation process. We showed that lamellocytes require betaPS integrin for encapsulation and that they transcribe one prophenoloxidase gene enabling them to produce the enzyme necessary for melanisation of the capsule. A second compelling observation was that following infection, the gene encoding the cytokine Spatzle was uniquely upregulated in haemocytes and not the fat body. This shows that Drosophila haemocytes produce a signal molecule ready to be activated through cleavage after pathogen recognition, informing distant tissues of infection.},
keywords = {Animals, bioinformatic, Catechol Oxidase, Cell Lineage, Enzyme Precursors, Escherichia coli, Fat Body, Gene Expression Profiling, Genome, Hemocytes, hoffmann, Integrin alpha Chains, Integrins, Larva, M3i, Micrococcus luteus},
pubstate = {published},
tppubtype = {article}
}
2002
Christophides George K, Zdobnov Evgeny, Barillas-Mury Carolina, Birney Ewan, Blandin Stephanie A, 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, Müller 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
Immunity-related genes and gene families in Anopheles gambiae Article de journal
Dans: Science, vol. 298, no. 5591, p. 159–165, 2002, ISSN: 1095-9203.
Résumé | Liens | BibTeX | Étiquettes: Alternative Splicing, Animals, Anopheles, Apoptosis, bacteria, bioinformatic, blandin, Catechol Oxidase, Computational Biology, Enzyme Precursors, Gene Expression Regulation, Genes, Genetic, Genome, hoffmann, Immunity, Innate, Insect, Insect Proteins, M3i, Multigene Family, Peptides, Phylogeny, Plasmodium, Protein Structure, reichhart, Selection, Serine Endopeptidases, Serpins, Signal Transduction, Tertiary
@article{christophides_immunity-related_2002,
title = {Immunity-related genes and gene families in Anopheles gambiae},
author = {George K Christophides and Evgeny Zdobnov and Carolina Barillas-Mury and Ewan Birney and Stephanie A Blandin and Claudia Blass and Paul T Brey and Frank H Collins and Alberto Danielli and George Dimopoulos and Charles Hetru and Ngo T Hoa and Jules A Hoffmann and Stefan M Kanzok and Ivica Letunic and Elena A Levashina and Thanasis G Loukeris and Gareth Lycett and Stephan Meister and Kristin Michel and Luis F Moita and Hans-Michael Müller and Mike A Osta and Susan M Paskewitz and Jean-Marc Reichhart and Andrey Rzhetsky and Laurent Troxler and Kenneth D Vernick and Dina Vlachou and Jennifer Volz and Christian von Mering and Jiannong Xu and Liangbiao Zheng and Peer Bork and Fotis C Kafatos},
url = {http://www.ncbi.nlm.nih.gov/pubmed/12364793},
doi = {10.1126/science.1077136},
issn = {1095-9203},
year = {2002},
date = {2002-10-01},
journal = {Science},
volume = {298},
number = {5591},
pages = {159--165},
abstract = {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.},
keywords = {Alternative Splicing, Animals, Anopheles, Apoptosis, bacteria, bioinformatic, blandin, Catechol Oxidase, Computational Biology, Enzyme Precursors, Gene Expression Regulation, Genes, Genetic, Genome, hoffmann, Immunity, Innate, Insect, Insect Proteins, M3i, Multigene Family, Peptides, Phylogeny, Plasmodium, Protein Structure, reichhart, Selection, Serine Endopeptidases, Serpins, Signal Transduction, Tertiary},
pubstate = {published},
tppubtype = {article}
}
1970
Hoffmann Jules A, Porte A, Joly P
On the localization of phenol-oxidase activity in coagulocytes of Locusta migratoria L. (Orthoptera) Article de journal
Dans: C.R. Hebd. Seances Acad. Sci., Ser. D, Sci. Nat., vol. 270, no. 4, p. 629–631, 1970.
BibTeX | Étiquettes: Animals, Catechol Oxidase, Hemolymph, hoffmann, insects, M3i, Tanning
@article{hoffmann_localization_1970,
title = {On the localization of phenol-oxidase activity in coagulocytes of Locusta migratoria L. (Orthoptera)},
author = {Jules A Hoffmann and A Porte and P Joly},
year = {1970},
date = {1970-01-01},
journal = {C.R. Hebd. Seances Acad. Sci., Ser. D, Sci. Nat.},
volume = {270},
number = {4},
pages = {629--631},
keywords = {Animals, Catechol Oxidase, Hemolymph, hoffmann, insects, M3i, Tanning},
pubstate = {published},
tppubtype = {article}
}