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Ramirez-Barrios R, Reyna-Bello A, Parra O, Valeris R, Tavares-Marques L, Brizard JP, Demettre E, Seveno M, Martinez-Moreno A, Holzmuller P. Trypanosoma vivax infection in sheep: Different patterns of virulence and pathogenicity associated with differentially expressed proteomes. Vet Parasitol 2019; 276S:100014. [PMID: 32904712 PMCID: PMC7458391 DOI: 10.1016/j.vpoa.2019.100014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/22/2019] [Accepted: 05/27/2019] [Indexed: 11/18/2022]
Abstract
Trypanosoma vivax strains exhibit different virulence and pathogenicity patterns. TvMT1 strain showed low virulence and high pathogenicity. TvLIEM176 strain showed high virulence and moderate pathogenicity. Protein expression varies in high virulence/moderate pathogenicity strain vs low virulence/high pathogenicity strain.
Cattle trypanosomosis caused by Trypanosoma vivax is a widely distributed disease in Africa and Latin America. It causes significant losses in the livestock industry and is characterized by fluctuating parasitemia, anemia, fever, lethargy, and weight loss. In this study we evaluated the virulence (capacity to multiply inside the host and to modulate the host response) and pathogenicity (ability to produce disease and/or mortality) patterns of two T. vivax strains (TvMT1 and TvLIEM176) in experimentally-infected sheep and determined the proteins differentially expressed in the proteomes of these two strains. Hematological and clinical parameters were monitored in experimentally-infected versus non-infected sheep for 60 days. All the infected animals developed discernable parasitemia at 3 days post-infection (dpi), and the first parasitemia peak was observed at 6 dpi. The maximum average value of parasitemia was 1.3 × 107 (95% CI, 7.9 × 105–2 × 108) parasites/ml in TvLIEM176-infected animals, and 2.5 × 106 (95% CI, 1.6 × 105–4 × 107) parasites/ml in TvMT1-infected ones. Anemia and clinical manifestations were more severe in the animals infected by TvMT1 strain than in those infected by TvLIEM176. In the proteomic analysis, a total of 29 proteins were identified, of which 14 exhibited significant differences in their expression levels between strains. Proteins with higher expression in TvLIEM176 were: alpha tubulin, beta tubulin, arginine kinase, glucose-regulated protein 78, paraflagellar protein 3, and T-complex protein 1 subunit theta. Proteins with higher expression in TvMT1 were: chaperonin HSP60, T-complex protein 1 subunit alpha, heat shock protein 70, pyruvate kinase, glycerol kinase, inosine-5'-monophosphate dehydrogenase, 73 kDa paraflagellar rod protein, and vacuolar ATP synthase. There was a difference in the virulence and pathogenicity between the T. vivax strains: TvLIEM176 showed high virulence and moderate pathogenicity, whereas TvMT1 showed low virulence and high pathogenicity. The proteins identified in this study are discussed for their potential involvement in strains’ virulence and pathogenicity, to be further defined as biomarkers of severity in T. vivax infections.
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Rodrigues V, Fernandez B, Vercoutere A, Chamayou L, Andersen A, Vigy O, Demettre E, Seveno M, Aprelon R, Giraud-Girard K, Stachurski F, Loire E, Vachiéry N, Holzmuller P. Immunomodulatory Effects of Amblyomma variegatum Saliva on Bovine Cells: Characterization of Cellular Responses and Identification of Molecular Determinants. Front Cell Infect Microbiol 2018; 7:521. [PMID: 29354598 PMCID: PMC5759025 DOI: 10.3389/fcimb.2017.00521] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 12/07/2017] [Indexed: 12/25/2022] Open
Abstract
The tropical bont tick, Amblyomma variegatum, is a tick species of veterinary importance and is considered as one of major pest of ruminants in Africa and in the Caribbean. It causes direct skin lesions, transmits heartwater, and reactivates bovine dermatophilosis. Tick saliva is reported to affect overall host responses through immunomodulatory and anti-inflammatory molecules, among other bioactive molecules. The general objective of this study was to better understand the role of saliva in interaction between the Amblyomma tick and the host using cellular biology approaches and proteomics, and to discuss its impact on disease transmission and/or activation. We first focused on the immuno-modulating effects of semi-fed A. variegatum female saliva on bovine peripheral blood mononuclear cells (PBMC) and monocyte-derived macrophages in vitro. We analyzed its immuno-suppressive properties by measuring the effect of saliva on PBMC proliferation, and observed a significant decrease in ConA-stimulated PBMC lymphoproliferation. We then studied the effect of saliva on bovine macrophages using flow cytometry to analyze the expression of MHC-II and co-stimulation molecules (CD40, CD80, and CD86) and by measuring the production of nitric oxide (NO) and pro- or anti-inflammatory cytokines. We observed a significant decrease in the expression of MHC-II, CD40, and CD80 molecules, associated with decreased levels of IL-12-p40 and TNF-α and increased level of IL-10, which could explain the saliva-induced modulation of NO. To elucidate these immunomodulatory effects, crude saliva proteins were analyzed using proteomics with an Orbitrap Elite mass spectrometer. Among the 336 proteins identified in A. variegatum saliva, we evidenced bioactive molecules exhibiting anti-inflammatory, immuno-modulatory, and anti-oxidant properties (e.g., serpins, phospholipases A2, heme lipoprotein). We also characterized an intriguing ubiquitination complex that could be involved in saliva-induced immune modulation of the host. We propose a model for the interaction between A. variegatum saliva and host immune cells that could have an effect during tick feeding by favoring pathogen dissemination or activation by reducing the efficiency of host immune response to the corresponding tick-borne diseases.
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Affiliation(s)
- Valérie Rodrigues
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Bernard Fernandez
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Arthur Vercoutere
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Léo Chamayou
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Alexandre Andersen
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Oana Vigy
- Institut de Génomique Fonctionnelle, Centre Nationnal de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Université de Montpellier, Montpellier, France
| | - Edith Demettre
- BioCampus Montpellier, Centre Nationnal de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Université de Montpellier, Montpellier, France
| | - Martial Seveno
- BioCampus Montpellier, Centre Nationnal de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Université de Montpellier, Montpellier, France
| | - Rosalie Aprelon
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,CIRAD, UMR ASTRE, Petit-Bourg, Guadeloupe, France
| | - Ken Giraud-Girard
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,CIRAD, UMR ASTRE, Petit-Bourg, Guadeloupe, France
| | - Frédéric Stachurski
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Etienne Loire
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
| | - Nathalie Vachiéry
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France.,CIRAD, UMR ASTRE, Petit-Bourg, Guadeloupe, France
| | - Philippe Holzmuller
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement, UMR ASTRE "Animal, Santé, Territoire, Risques et Ecosystèmes,"Montpellier, France.,ASTRE, Université de Montpellier (I-MUSE), CIRAD, Institut National de la Recherche Agronomique, Montpellier, France
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Somda MB, Cornelie S, Bengaly Z, Mathieu-Daudé F, Poinsignon A, Dama E, Bouyer J, Sidibé I, Demettre E, Seveno M, Remoué F, Sanon A, Bucheton B. Identification of a Tsal152-75 salivary synthetic peptide to monitor cattle exposure to tsetse flies. Parasit Vectors 2016; 9:149. [PMID: 26979518 PMCID: PMC4791801 DOI: 10.1186/s13071-016-1414-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 03/01/2016] [Indexed: 01/10/2023] Open
Abstract
Background The saliva of tsetse flies contains a cocktail of bioactive molecules inducing specific antibody responses in hosts exposed to bites. We have previously shown that an indirect-ELISA test using whole salivary extracts from Glossina morsitans submorsitans was able to discriminate between (i) cattle from tsetse infested and tsetse free areas and (ii) animals experimentally exposed to low or high numbers of tsetse flies. In the present study, our aim was to identify specific salivary synthetic peptides that could be used to develop simple immunoassays to measure cattle exposure to tsetse flies. Methods In a first step, 2D-electrophoresis immunoblotting, using sera from animals exposed to a variety of bloodsucking arthropods, was performed to identify specific salivary proteins recognised in cattle exposed to tsetse bites. Linear epitope prediction software and Blast analysis were then used to design synthetic peptides within the identified salivary proteins. Finally, candidate peptides were tested by indirect-ELISA on serum samples from tsetse infested and tsetse free areas, and from exposure experiments. Results The combined immunoblotting and bioinformatics analyses led to the identification of five peptides carrying putative linear epitopes within two salivary proteins: the tsetse salivary gland protein 1 (Tsal1) and the Salivary Secreted Adenosine (SSA). Of these, two were synthesised and tested further based on the absence of sequence homology with other arthropods or pathogen species. IgG responses to the Tsal152–75 synthetic peptide were shown to be specific of tsetse exposure in both naturally and experimentally exposed hosts. Nevertheless, anti-Tsal152–75 IgG responses were absent in animals exposed to high tsetse biting rates. Conclusions These results suggest that Tsal152–75 specific antibodies represent a biomarker of low cattle exposure to tsetse fly. These results are discussed in the light of the other available tsetse saliva based-immunoassays and in the perspective of developing a simple serological tool for tsetse eradication campaigns to assess the tsetse free status or to detect tsetse reemergence in previously cleared areas. Electronic supplementary material The online version of this article (doi:10.1186/s13071-016-1414-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Martin Bienvenu Somda
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), 01 BP 454, Bobo-Dioulasso 01, Burkina Faso. .,Université Polytechnique de Bobo-Dioulasso, 01 BP 1 091, Bobo-Dioulasso 01, Burkina Faso.
| | - Sylvie Cornelie
- Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche 224, Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), Montpellier, 34394 Cedex 5, France
| | - Zakaria Bengaly
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), 01 BP 454, Bobo-Dioulasso 01, Burkina Faso
| | - Françoise Mathieu-Daudé
- Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche 224, Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), Montpellier, 34394 Cedex 5, France
| | - Anne Poinsignon
- Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche 224, Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), Montpellier, 34394 Cedex 5, France
| | - Emilie Dama
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), 01 BP 454, Bobo-Dioulasso 01, Burkina Faso.,Université Polytechnique de Bobo-Dioulasso, 01 BP 1 091, Bobo-Dioulasso 01, Burkina Faso
| | - Jeremy Bouyer
- CIRAD, UMR CIRAD-INRA Contrôle des Maladies Animales, Campus International de Baillarguet, F34398, Montpellier, France.,Institut de Recherche pour le Développement, Unité Mixte de Recherche IRD-CIRAD 177, Interactions hôtes-vecteurs-parasites dans les maladies dues aux Trypanosomatidae, Campus International de Baillarguet, Montpellier, 34398 Cedex 5, France
| | - Issa Sidibé
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide (CIRDES), 01 BP 454, Bobo-Dioulasso 01, Burkina Faso.,Pan African Tsetse and Trypanosomosis Eradication Campaign (PATTEC), Projet de Création de Zones Libérées Durablement de Tsé-tsé et de Trypanosomoses (PCZLD), Bobo-Dioulasso, Burkina Faso
| | - Edith Demettre
- Institut de Génomique Fonctionnelle, CNRS UMR 5203, INSERM U1191, UM1, UM2, Plate-forme de Protéomique Fonctionnelle CNRS UMS BioCampus 3426, 34094, Montpellier, France
| | - Martial Seveno
- Institut de Génomique Fonctionnelle, CNRS UMR 5203, INSERM U1191, UM1, UM2, Plate-forme de Protéomique Fonctionnelle CNRS UMS BioCampus 3426, 34094, Montpellier, France
| | - Franck Remoué
- Institut de Recherche pour le Développement (IRD), Unité Mixte de Recherche 224, Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), Montpellier, 34394 Cedex 5, France
| | - Antoine Sanon
- Université de Ouagadougou, UFR/SVT, Laboratoire d'Entomologie Fondamentale et Appliquée (LEFA), BP 9499, Ouagadougou 06, Burkina Faso
| | - Bruno Bucheton
- Institut de Recherche pour le Développement, Unité Mixte de Recherche IRD-CIRAD 177, Interactions hôtes-vecteurs-parasites dans les maladies dues aux Trypanosomatidae, Campus International de Baillarguet, Montpellier, 34398 Cedex 5, France
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Pichon A, Bézier A, Urbach S, Aury JM, Jouan V, Ravallec M, Guy J, Cousserans F, Thézé J, Gauthier J, Demettre E, Schmieder S, Wurmser F, Sibut V, Poirié M, Colinet D, da Silva C, Couloux A, Barbe V, Drezen JM, Volkoff AN. Recurrent DNA virus domestication leading to different parasite virulence strategies. Sci Adv 2015; 1:e1501150. [PMID: 26702449 PMCID: PMC4681339 DOI: 10.1126/sciadv.1501150] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 10/15/2015] [Indexed: 05/31/2023]
Abstract
Relics of ancient infections are abundant in eukaryote genomes, but little is known about how they evolve when they confer a functional benefit on their host. We show here, for the first time, that the virus-like particles shown to protect Venturia canescens eggs against host immunity are derived from a nudivirus genome incorporated by the parasitic wasp into its own genetic material. Nudivirus hijacking was also at the origin of protective particles from braconid wasps. However, we show here that the viral genes produce "liposomes" that wrap and deliver V. canescens virulence proteins, whereas the particles are used as gene transfer agents in braconid wasps. Our findings indicate that virus domestication has occurred repeatedly during parasitic wasp evolution but with different evolutionary trajectories after endogenization, resulting in different virulence molecule delivery strategies.
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Affiliation(s)
- Apolline Pichon
- Microorganism and Insect Diversity, Genomes, and Interactions (DGIMI) Laboratory, UMR 1333 INRA, Université de Montpellier, Place Eugène Bataillon, CC101, Montpellier Cedex 34095, France
| | - Annie Bézier
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261, CNRS-Université François Rabelais de Tours, Parc de Grandmont, Tours 37200, France
| | - Serge Urbach
- Functional Proteomics Platform, BioCampus Montpellier, UMS CNRS 3426, INSERM US009, Institut de Génomique Fonctionnelle, UMR CNRS 5203, INSERM U661, Université de Montpellier, Montpellier 34094, France
| | - Jean-Marc Aury
- Commissariat à l’Energie Atomique (CEA), Institut de Génomique (IG), Genoscope, 2 rue Gaston Crémieux, BP5706, Evry 91057, France
| | - Véronique Jouan
- Microorganism and Insect Diversity, Genomes, and Interactions (DGIMI) Laboratory, UMR 1333 INRA, Université de Montpellier, Place Eugène Bataillon, CC101, Montpellier Cedex 34095, France
| | - Marc Ravallec
- Microorganism and Insect Diversity, Genomes, and Interactions (DGIMI) Laboratory, UMR 1333 INRA, Université de Montpellier, Place Eugène Bataillon, CC101, Montpellier Cedex 34095, France
| | - Julie Guy
- Commissariat à l’Energie Atomique (CEA), Institut de Génomique (IG), Genoscope, 2 rue Gaston Crémieux, BP5706, Evry 91057, France
| | - François Cousserans
- Microorganism and Insect Diversity, Genomes, and Interactions (DGIMI) Laboratory, UMR 1333 INRA, Université de Montpellier, Place Eugène Bataillon, CC101, Montpellier Cedex 34095, France
| | - Julien Thézé
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261, CNRS-Université François Rabelais de Tours, Parc de Grandmont, Tours 37200, France
| | - Jérémy Gauthier
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261, CNRS-Université François Rabelais de Tours, Parc de Grandmont, Tours 37200, France
| | - Edith Demettre
- Functional Proteomics Platform, BioCampus Montpellier, UMS CNRS 3426, INSERM US009, Institut de Génomique Fonctionnelle, UMR CNRS 5203, INSERM U661, Université de Montpellier, Montpellier 34094, France
| | - Sandra Schmieder
- Institut Sophia Agrobiotech (ISA), UMR INRA 1355, CNRS 7254, Université Nice Sophia Antipolis, 400 route des Chappes, Sophia Antipolis 06903, France
| | - François Wurmser
- PPF Analyse des systèmes biologiques, Université François Rabelais de Tours, 3 Boulevard Tonnellé, Tours 37000, France
| | - Vonick Sibut
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261, CNRS-Université François Rabelais de Tours, Parc de Grandmont, Tours 37200, France
| | - Marylène Poirié
- Institut Sophia Agrobiotech (ISA), UMR INRA 1355, CNRS 7254, Université Nice Sophia Antipolis, 400 route des Chappes, Sophia Antipolis 06903, France
| | - Dominique Colinet
- Institut Sophia Agrobiotech (ISA), UMR INRA 1355, CNRS 7254, Université Nice Sophia Antipolis, 400 route des Chappes, Sophia Antipolis 06903, France
| | - Corinne da Silva
- Commissariat à l’Energie Atomique (CEA), Institut de Génomique (IG), Genoscope, 2 rue Gaston Crémieux, BP5706, Evry 91057, France
| | - Arnaud Couloux
- Commissariat à l’Energie Atomique (CEA), Institut de Génomique (IG), Genoscope, 2 rue Gaston Crémieux, BP5706, Evry 91057, France
| | - Valérie Barbe
- Commissariat à l’Energie Atomique (CEA), Institut de Génomique (IG), Genoscope, 2 rue Gaston Crémieux, BP5706, Evry 91057, France
| | - Jean-Michel Drezen
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261, CNRS-Université François Rabelais de Tours, Parc de Grandmont, Tours 37200, France
| | - Anne-Nathalie Volkoff
- Microorganism and Insect Diversity, Genomes, and Interactions (DGIMI) Laboratory, UMR 1333 INRA, Université de Montpellier, Place Eugène Bataillon, CC101, Montpellier Cedex 34095, France
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Chetouhi C, Panek J, Bonhomme L, ElAlaoui H, Texier C, Langin T, de Bekker C, Urbach S, Demettre E, Missé D, Holzmuller P, Hughes DP, Zanzoni A, Brun C, Biron DG. Cross-talk in host–parasite associations: What do past and recent proteomics approaches tell us? Infection, Genetics and Evolution 2015; 33:84-94. [DOI: 10.1016/j.meegid.2015.04.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 11/29/2022]
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Marie A, Holzmuller P, Tchioffo MT, Rossignol M, Demettre E, Seveno M, Corbel V, Awono-Ambéné P, Morlais I, Remoue F, Cornelie S. Anopheles gambiae salivary protein expression modulated by wild Plasmodium falciparum infection: highlighting of new antigenic peptides as candidates of An. gambiae bites. Parasit Vectors 2014; 7:599. [PMID: 25526764 PMCID: PMC4287575 DOI: 10.1186/s13071-014-0599-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 12/10/2014] [Indexed: 12/24/2022] Open
Abstract
Background Malaria is the major parasitic disease worldwide caused by Plasmodium infection. The objective of integrated malaria control programs is to decrease malaria transmission, which needs specific tools to be accurately assessed. In areas where the transmission is low or has been substantially reduced, new complementary tools have to be developed to improve surveillance. A recent approach, based on the human antibody response to Anopheles salivary proteins, has been shown to be efficient in evaluating human exposure to Anopheles bites. The aim of the present study was to identify new An. gambiae salivary proteins as potential candidate biomarkers of human exposure to P. falciparum-infective bites. Methods Experimental infections of An. gambiae by wild P. falciparum were carried out in semi-field conditions. Then a proteomic approach, combining 2D-DIGE and mass spectrometry, was used to identify the overexpressed salivary proteins in infected salivary glands compared to uninfected An. gambiae controls. Subsequently, a peptide design of each potential candidate was performed in silico and their antigenicity was tested by an epitope-mapping technique using blood from individuals exposed to Anopheles bites. Results Five salivary proteins (gSG6, gSG1b, TRIO, SG5 and long form D7) were overexpressed in the infected salivary glands. Eighteen peptides were designed from these proteins and were found antigenic in children exposed to the Anopheles bites. Moreover, the results showed that the presence of wild P. falciparum in salivary glands modulates the expression of several salivary proteins and also appeared to induce post-translational modifications. Conclusions This study is, to our knowledge, the first that compares the sialome of An. gambiae both infected and not infected by wild P. falciparum, making it possible to mimic the natural conditions of infection. This is a first step toward a better understanding of the close interactions between the parasite and the salivary gland of mosquitoes. In addition, these results open the way to define biomarkers of infective bites of Anopheles, which could, in the future, improve the estimation of malaria transmission and the evaluation of malaria vector control tools. Electronic supplementary material The online version of this article (doi:10.1186/s13071-014-0599-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alexandra Marie
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France.
| | - Philippe Holzmuller
- CIRAD Département Systèmes Biologiques BIOS UMR 15 CMAEE "Contrôle des Maladies Exotiques et Emergentes", Campus International de Baillarguet, TA A-15/G, Montpellier cedex 5, 34398, France.
| | - Majoline T Tchioffo
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France.
| | - Marie Rossignol
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France.
| | - Edith Demettre
- Institut de Génomique Fonctionnelle, CNRS UMR 5203, INSERM U661, UM1, UM2, Plate-forme de Protéomique Fonctionnelle CNRS UMS BioCampus 3426, Montpellier, 34094, France.
| | - Martial Seveno
- Institut de Génomique Fonctionnelle, CNRS UMR 5203, INSERM U661, UM1, UM2, Plate-forme de Protéomique Fonctionnelle CNRS UMS BioCampus 3426, Montpellier, 34094, France.
| | - Vincent Corbel
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France. .,Department of Entomology, Faculty of Agriculture, Kasetsart University, 50 Ngam Wong Wan Rd, Ladyaow Chatuchak, Bangkok, 10900, Thailand.
| | - Parfait Awono-Ambéné
- Laboratoire de Recherche sur le Paludisme, Organisation de Coordination pour la lutte contre les Endémies en Afrique Centrale (OCEAC), Yaoundé, BP 288, Cameroun.
| | - Isabelle Morlais
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France. .,Laboratoire de Recherche sur le Paludisme, Organisation de Coordination pour la lutte contre les Endémies en Afrique Centrale (OCEAC), Yaoundé, BP 288, Cameroun.
| | - Franck Remoue
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France.
| | - Sylvie Cornelie
- MIVEGEC (UMR IRD224 CNRS 5290 UM1-UM2), Institut de Recherche pour le développement (IRD), 911 avenue Agropolis, Montpellier cedex 5, 34394, France. .,MIVEGEC- IRD- CREC, Cotonou, 01 BP4414 RP, Bénin.
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7
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Cornelie S, Rossignol M, Seveno M, Demettre E, Mouchet F, Djègbè I, Marin P, Chandre F, Corbel V, Remoué F, Mathieu-Daudé F. Salivary gland proteome analysis reveals modulation of anopheline unique proteins in insensitive acetylcholinesterase resistant Anopheles gambiae mosquitoes. PLoS One 2014; 9:e103816. [PMID: 25102176 PMCID: PMC4125145 DOI: 10.1371/journal.pone.0103816] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 07/02/2014] [Indexed: 12/12/2022] Open
Abstract
Insensitive acetylcholinesterase resistance due to a mutation in the acetylcholinesterase (ace) encoding ace-1 gene confers cross-resistance to organophosphate and carbamate insecticides in Anopheles gambiae populations from Central and West Africa. This mutation is associated with a strong genetic cost revealed through alterations of some life history traits but little is known about the physiological and behavioural changes in insects bearing the ace-1R allele. Comparative analysis of the salivary gland contents between An. gambiae susceptible and ace-1R resistant strains was carried out to charaterize factors that could be involved in modifications of blood meal process, trophic behaviour or pathogen interaction in the insecticide-resistant mosquitoes. Differential analysis of the salivary gland protein profiles revealed differences in abundance for several proteins, two of them showing major differences between the two strains. These two proteins identified as saglin and TRIO are salivary gland-1 related proteins, a family unique to anopheline mosquitoes, one of them playing a crucial role in salivary gland invasion by Plasmodium falciparum sporozoites. Differential expression of two other proteins previously identified in the Anopheles sialome was also observed. The differentially regulated proteins are involved in pathogen invasion, blood feeding process, and protection against oxidation, relevant steps in the outcome of malaria infection. Further functional studies and insect behaviour experiments would confirm the impact of the modification of the sialome composition on blood feeding and pathogen transmission abilities of the resistant mosquitoes. The data supports the hypothesis of alterations linked to insecticide resistance in the biology of the primary vector of human malaria in Africa.
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Affiliation(s)
- Sylvie Cornelie
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Marie Rossignol
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Martial Seveno
- Institut de Génomique Fonctionnelle (IGF), UMR CNRS 5203-INSERM 661-UM1-UM2, Montpellier, France
| | - Edith Demettre
- Institut de Génomique Fonctionnelle (IGF), UMR CNRS 5203-INSERM 661-UM1-UM2, Montpellier, France
| | - François Mouchet
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Innocent Djègbè
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Centre de Recherche Entomologique de Cotonou (CREC), Cotonou, Bénin
| | - Philippe Marin
- Institut de Génomique Fonctionnelle (IGF), UMR CNRS 5203-INSERM 661-UM1-UM2, Montpellier, France
| | - Fabrice Chandre
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Vincent Corbel
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Centre de Recherche Entomologique de Cotonou (CREC), Cotonou, Bénin
| | - Franck Remoué
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Centre de Recherche Entomologique de Cotonou (CREC), Cotonou, Bénin
| | - Françoise Mathieu-Daudé
- Maladies Infectieuses et Vecteurs, Ecologie, Génétique, Evolution et Contrôle (MIVEGEC), UMR IRD 224-CNRS 5290-UM1-UM2, Institut de Recherche pour le Développement (IRD), Montpellier, France
- * E-mail:
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8
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Panek J, El Alaoui H, Mone A, Urbach S, Demettre E, Texier C, Brun C, Zanzoni A, Peyretaillade E, Parisot N, Lerat E, Peyret P, Delbac F, Biron DG. Hijacking of host cellular functions by an intracellular parasite, the microsporidian Anncaliia algerae. PLoS One 2014; 9:e100791. [PMID: 24967735 PMCID: PMC4072689 DOI: 10.1371/journal.pone.0100791] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 05/29/2014] [Indexed: 11/18/2022] Open
Abstract
Intracellular pathogens including bacteria, viruses and protozoa hijack host cell functions to access nutrients and to bypass cellular defenses and immune responses. These strategies have been acquired through selective pressure and allowed pathogens to reach an appropriate cellular niche for their survival and growth. To get new insights on how parasites hijack host cellular functions, we developed a SILAC (Stable Isotope Labeling by Amino Acids in Cell culture) quantitative proteomics workflow. Our study focused on deciphering the cross-talk in a host-parasite association, involving human foreskin fibroblasts (HFF) and the microsporidia Anncaliia algerae, a fungus related parasite with an obligate intracellular lifestyle and a strong host dependency. The host-parasite cross-talk was analyzed at five post-infection times 1, 6, 12 and 24 hours post-infection (hpi) and 8 days post-infection (dpi). A significant up-regulation of four interferon-induced proteins with tetratricopeptide repeats IFIT1, IFIT2, IFIT3 and MX1 was observed at 8 dpi suggesting a type 1 interferon (IFN) host response. Quantitative alteration of host proteins involved in biological functions such as signaling (STAT1, Ras) and reduction of the translation activity (EIF3) confirmed a host type 1 IFN response. Interestingly, the SILAC approach also allowed the detection of 148 A. algerae proteins during the kinetics of infection. Among these proteins many are involved in parasite proliferation, and an over-representation of putative secreted effectors proteins was observed. Finally our survey also suggests that A. algerae could use a transposable element as a lure strategy to escape the host innate immune system.
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Affiliation(s)
- Johan Panek
- Clermont Université, Université Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, Clermont-Ferrand, France
- CNRS, UMR 6023, LMGE, Aubière, France
| | - Hicham El Alaoui
- Clermont Université, Université Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, Clermont-Ferrand, France
- CNRS, UMR 6023, LMGE, Aubière, France
- * E-mail: (HEA); (DGB)
| | - Anne Mone
- Clermont Université, Université Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, Clermont-Ferrand, France
- CNRS, UMR 6023, LMGE, Aubière, France
| | - Serge Urbach
- Functional Proteomics Platform. UMR CNRS 5203, Montpellier, France
| | - Edith Demettre
- Functional Proteomics Platform. UMS CNRS 3426, Montpellier, France
| | - Catherine Texier
- Clermont Université, Université Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, Clermont-Ferrand, France
- CNRS, UMR 6023, LMGE, Aubière, France
| | - Christine Brun
- INSERM, UMR1090 TAGC, Marseille, Marseille, France
- Aix-Marseille Université, UMR1090 TAGC, Marseille, France
- CNRS, Marseille, France
| | - Andreas Zanzoni
- INSERM, UMR1090 TAGC, Marseille, Marseille, France
- Aix-Marseille Université, UMR1090 TAGC, Marseille, France
| | - Eric Peyretaillade
- Clermont Université, Université d'Auvergne, I.U.T., UFR Pharmacie, Clermont-Ferrand, France
- Clermont Université, Université d'Auvergne, EA 4678, Conception, Ingénierie et Développement de l'Aliment et du Médicament, Clermont-Ferrand, France
| | - Nicolas Parisot
- Clermont Université, Université d'Auvergne, I.U.T., UFR Pharmacie, Clermont-Ferrand, France
- Clermont Université, Université d'Auvergne, EA 4678, Conception, Ingénierie et Développement de l'Aliment et du Médicament, Clermont-Ferrand, France
| | - Emmanuelle Lerat
- Université de Lyon, Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Villeurbanne, France
| | - Pierre Peyret
- Clermont Université, Université d'Auvergne, I.U.T., UFR Pharmacie, Clermont-Ferrand, France
- Clermont Université, Université d'Auvergne, EA 4678, Conception, Ingénierie et Développement de l'Aliment et du Médicament, Clermont-Ferrand, France
| | - Frederic Delbac
- Clermont Université, Université Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, Clermont-Ferrand, France
- CNRS, UMR 6023, LMGE, Aubière, France
| | - David G. Biron
- Clermont Université, Université Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, Clermont-Ferrand, France
- CNRS, UMR 6023, LMGE, Aubière, France
- * E-mail: (HEA); (DGB)
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9
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Machin A, Telleria J, Brizard JP, Demettre E, Séveno M, Ayala FJ, Tibayrenc M. Trypanosoma cruzi: gene expression surveyed by proteomic analysis reveals interaction between different genotypes in mixed in vitro cultures. PLoS One 2014; 9:e95442. [PMID: 24748035 PMCID: PMC3991653 DOI: 10.1371/journal.pone.0095442] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 03/26/2014] [Indexed: 11/30/2022] Open
Abstract
We have analyzed the comportment in in vitro culture of 2 different genotypes of Trypanosoma cruzi, the agent of Chagas disease, pertaining to 2 major genetic subdivisions (near-clades) of this parasite. One of the stocks was a fast-growing one, highly virulent in mice, while the other one was slow- growing, mildly virulent in mice. The working hypothesis was that mixtures of genotypes interact, a pattern that has been observed by us in empirical experimental studies. Genotype mixtures were followed every 7 days and characterized by the DIGE technology of proteomic analysis. Proteic spots of interest were characterized by the SAMESPOT software. Patterns were compared to those of pure genotypes that were also evaluated every 7 days. One hundred and three spots exhibited changes in time by comparison with T = 0. The major part of these spots (58%) exhibited an under-expression pattern by comparison with the pure genotypes. 32% of the spots wereover-expressed; 10% of spots were not different from those of pure genotypes. Interestingly, interaction started a few minutes after the mixtures were performed. We have retained 43 different proteins that clearly exhibited either under- or over-expression. Proteins showing interaction were characterized by mass spectrometry (MALDI-TOF). Close to 50% of them were either tubulins or heat shock proteins. This study confirms that mixed genotypes of T. cruzi interact at the molecular level. This is of great interest because mixtures of genotypes are very frequent in Chagas natural cycles, both in insect vectors and in mammalian hosts, and may play an important role in the transmission and severity of Chagas disease. The methodology proposed here is potentially applicable to any micropathogen, including fungi, bacteria and viruses. It should be of great interest in the case of bacteria, for which the epidemiological and clinical consequences of mixed infections could be underestimated.
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Affiliation(s)
- Alexandre Machin
- Unité Mixte de Recherche, Institut de Recherche pour le Développement/Centre National de la Recherche Scientifique/Universités Montpellier 1 and 2, Génétique et Evolution des Maladies Infectieuses, n° 5290, Maladies Infectieuses et Vecteurs Ecologie, Génétique, Evolution et Contrôle (MIVEGEC) Institut de Recherche pour le Développement, Montpellier, France
| | - Jenny Telleria
- Unité Mixte de Recherche, Institut de Recherche pour le Développement/Centre National de la Recherche Scientifique/Universités Montpellier 1 and 2, Génétique et Evolution des Maladies Infectieuses, n° 5290, Maladies Infectieuses et Vecteurs Ecologie, Génétique, Evolution et Contrôle (MIVEGEC) Institut de Recherche pour le Développement, Montpellier, France
| | - Jean-Paul Brizard
- Unité Mixte de Recherche, Institut de Recherche pour le Développement/Centre National de la Recherche Scientifique, n° 5096, Centre Institut de Recherche pour le Développement, Montpellier, France
| | - Edith Demettre
- Plate-forme de Proteomique Fonctionnelle, c/o Institut de Génomique Fonctionnelle, Centre National de la Recherche Scientifique Unité Mixte de Recherche 5203, Institut National de la Santé et de la Recherche Médicales, Unité 661, Université Montpellier I et II, Montpellier, France
| | - Martial Séveno
- Plate-forme de Proteomique Fonctionnelle, c/o Institut de Génomique Fonctionnelle, Centre National de la Recherche Scientifique Unité Mixte de Recherche 5203, Institut National de la Santé et de la Recherche Médicales, Unité 661, Université Montpellier I et II, Montpellier, France
| | - Francisco José Ayala
- Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, California, United States of America
| | - Michel Tibayrenc
- Unité Mixte de Recherche, Institut de Recherche pour le Développement/Centre National de la Recherche Scientifique/Universités Montpellier 1 and 2, Génétique et Evolution des Maladies Infectieuses, n° 5290, Maladies Infectieuses et Vecteurs Ecologie, Génétique, Evolution et Contrôle (MIVEGEC) Institut de Recherche pour le Développement, Montpellier, France
- * E-mail:
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10
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Doucoure S, Cornelie S, Patramool S, Mouchet F, Demettre E, Seveno M, Dehecq JS, Rutee H, Herve JP, Favier F, Missé D, Gasque P, Remoue F. First screening of Aedes albopictus immunogenic salivary proteins. Insect Mol Biol 2013; 22:411-423. [PMID: 23714164 DOI: 10.1111/imb.12032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Study of the human antibody (Ab) response to Aedes salivary proteins can provide new biomarkers to evaluate human exposure to vector bites. The identification of genus- and/or species-specific proteins is necessary to improve the accuracy of biomarkers. We analysed Aedes albopictus immunogenic salivary proteins by 2D immunoproteomic technology and compared the profiles according to human individual exposure to Ae. albopictus or Ae. aegypti bites. Strong antigenicity to Ae. albopictus salivary proteins was detected in all individuals whatever the nature of Aedes exposure. Amongst these antigenic proteins, 68% are involved in blood feeding, including D7 protein family, adenosine deaminase, serpin and apyrase. This study provides an insight into the repertoire of Ae. albopictus immunogenic salivary proteins for the first time.
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Affiliation(s)
- S Doucoure
- MIVEGEC: Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle, , Universities of Montpellier 1 and 2., Montpellier, France.
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11
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Dama E, Cornelie S, Bienvenu Somda M, Camara M, Kambire R, Courtin F, Jamonneau V, Demettre E, Seveno M, Bengaly Z, Solano P, Poinsignon A, Remoue F, Belem AMG, Bucheton B. Identification of Glossina palpalis gambiensis specific salivary antigens: towards the development of a serologic biomarker of human exposure to tsetse flies in West Africa. Microbes Infect 2013; 15:416-27. [PMID: 23500186 DOI: 10.1016/j.micinf.2013.03.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/26/2013] [Accepted: 03/01/2013] [Indexed: 12/27/2022]
Abstract
The saliva of blood sucking arthropods contains a number of pharmacologically active compounds that induce an antibody response in exposed human individuals. The objectives of the present study were (i) to assess the human IgG response directed against salivary antigens of Glossina palpalis gambiensis, the main vector of Trypanosoma brucei gambiense in West Africa, as a biomarker of human-tsetse contacts; and (ii) to identify specific salivary antigens. Immune reactivity of human plasma collected within active human African trypanosomiasis (HAT) foci (coastal Guinea), historical foci where tsetse flies are still present (South-West Burkina Faso) and a tsetse free area (Bobo-Dioulasso, Burkina Faso), was measured by ELISA against whole saliva extracts. In the active HAT foci and areas where tsetse flies were present in high densities, specific IgG responses were significantly higher (p < 0.0001) to those in Bobo-Dioulasso or in Loropeni, where tsetse flies were either absent or only present at low densities. Furthermore, 2D-electrophoresis combined with mass spectrometry enabled to reveal that several antigens were specifically recognized by plasma from exposed individuals. Among them, four salivary proteins were successfully identified (Ada, 5'Nuc, Ag5 and Tsgf1). These results represent a first attempt to identify Glossina salivary proteins or synthetic peptides to develop a standardized and specific biomarker of tsetse exposure in West Africa.
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Affiliation(s)
- Emilie Dama
- Centre International de Recherche-Développement sur l'Elevage en zone Subhumide CIRDES, 01 BP 454 Bobo-Dioulasso 01, Burkina Faso
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12
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Dorémus T, Urbach S, Jouan V, Cousserans F, Ravallec M, Demettre E, Wajnberg E, Poulain J, Azéma-Dossat C, Darboux I, Escoubas JM, Colinet D, Gatti JL, Poirié M, Volkoff AN. Venom gland extract is not required for successful parasitism in the polydnavirus-associated endoparasitoid Hyposoter didymator (Hym. Ichneumonidae) despite the presence of numerous novel and conserved venom proteins. Insect Biochem Mol Biol 2013; 43:292-307. [PMID: 23298679 DOI: 10.1016/j.ibmb.2012.12.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 12/21/2012] [Accepted: 12/21/2012] [Indexed: 06/01/2023]
Abstract
The venom gland is a conserved organ in Hymenoptera that shows adaptations associated with life-style diversification. Few studies have investigated venom components and function in the highly diverse parasitic wasps and all suggest that the venom regulates host physiology. We explored the venom of the endoparasitoid Hyposoter didymator (Campopleginae), a species with an associated polydnavirus produced in the ovarian tissue. We investigated the effects of the H. didymator venom on two physiological traits of the host Spodoptera frugiperda (Noctuidae): encapsulation response and growth rate. We found that H. didymator venom had no significant effect on host cellular immunity or development, suggesting that it does not contribute to parasitism success. The host physiology seemed to be modified essentially by the ovarian fluid containing the symbiotic polydnaviruses. Proteomic analyses indicated that the H. didymator venom gland produces a large variety of proteins, consistent with the classical hymenopteran venom protein signature, including: reprolysin-like, dipeptidyl peptidase IV, hyaluronidase, arginine kinase or allergen proteins. The venom extracts also contained novel proteins, encoded by venom genes conserved in Campopleginae ichneumonids, and proteins with similarities to active molecules identified in other parasitoid species, such as calreticulin, reprolysin, superoxide dismutase and serpin. However, some of these proteins appear to be produced only in small amounts or to not be secreted. Possibly, in Campopleginae carrying polydnaviruses, the host-modifying activities of venom became redundant following the acquisition of polydnaviruses by the lineage.
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Affiliation(s)
- Tristan Dorémus
- INRA (UMR 1333), Université de Montpellier 2, "Insect-Microorganisms Diversity, Genomes and Interactions", Place Eugène Bataillon, CC101, 34095 Montpellier Cedex, France
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13
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Duncan AB, Agnew P, Noel V, Demettre E, Seveno M, Brizard JP, Michalakis Y. Proteome of Aedes aegypti in response to infection and coinfection with microsporidian parasites. Ecol Evol 2012; 2:681-94. [PMID: 22837817 PMCID: PMC3399191 DOI: 10.1002/ece3.199] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 12/01/2011] [Indexed: 12/24/2022] Open
Abstract
Hosts are frequently infected with more than one parasite or pathogen at any one time, but little is known as to how they respond to multiple immune challenges compared to those involving single infections. We investigated the proteome of Aedes aegypti larvae following infection with either Edhazardia aedis or Vavraia culicis, and coinfections involving both. They are both obligate intracellular parasites belonging to the phylum microsporidia and infect natural populations of Ae. aegypti. The results found some proteins only showing modified abundance in response to infections involving E. aedis, while others were only differentially abundant when infections involved V. culicis. Some proteins only responded with modified abundance to the coinfection condition, while others were differentially abundant in response to all three types of infection. As time since infection increased, the response to each of the single parasite infections diverged, while the response to the E. aedis and coinfection treatments converged. Some of the proteins differentially abundant in response to infection were identified. They included two vacuolar ATPases, proteins known to have a role in determining the infection success of intracellular parasites. This result suggests microsporidia could influence the infection success of other intracellular pathogens infecting vector species of mosquito, including viruses, Plasmodium and Wolbachia.
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14
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Wasinpiyamongkol L, Patramool S, Luplertlop N, Surasombatpattana P, Doucoure S, Mouchet F, Séveno M, Remoue F, Demettre E, Brizard JP, Jouin P, Biron DG, Thomas F, Missé D. Blood-feeding and immunogenic Aedes aegypti saliva proteins. Proteomics 2010; 10:1906-16. [PMID: 19882664 DOI: 10.1002/pmic.200900626] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Mosquito-transmitted pathogens pass through the insect's midgut (MG) and salivary gland (SG). What occurs in these organs in response to a blood meal is poorly understood, but identifying the physiological differences between sugar-fed and blood-fed (BF) mosquitoes could shed light on factors important in pathogens transmission. We compared differential protein expression in the MGs and SGs of female Aedes aegypti mosquitoes after a sugar- or blood-based diet. No difference was observed in the MG protein expression levels but certain SG proteins were highly expressed only in BF mosquitoes. In sugar-fed mosquitoes, housekeeping proteins were highly expressed (especially those related to energy metabolism) and actin was up-regulated. The immunofluorescence assay shows that there is no disruption of the SG cytoskeletal after the blood meal. We have generated for the first time the 2-DE profiles of immunogenic Ae. aegypti SG BF-related proteins. These new data could contribute to the understanding of the physiological processes that appear during the blood meal.
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Affiliation(s)
- Ladawan Wasinpiyamongkol
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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15
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Volkoff AN, Jouan V, Urbach S, Samain S, Bergoin M, Wincker P, Demettre E, Cousserans F, Provost B, Coulibaly F, Legeai F, Béliveau C, Cusson M, Gyapay G, Drezen JM. Analysis of virion structural components reveals vestiges of the ancestral ichnovirus genome. PLoS Pathog 2010; 6:e1000923. [PMID: 20523890 PMCID: PMC2877734 DOI: 10.1371/journal.ppat.1000923] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Accepted: 04/26/2010] [Indexed: 11/18/2022] Open
Abstract
Many thousands of endoparasitic wasp species are known to inject polydnavirus (PDV) particles into their caterpillar host during oviposition, causing immune and developmental dysfunctions that benefit the wasp larva. PDVs associated with braconid and ichneumonid wasps, bracoviruses and ichnoviruses respectively, both deliver multiple circular dsDNA molecules to the caterpillar. These molecules contain virulence genes but lack core genes typically involved in particle production. This is not completely unexpected given that no PDV replication takes place in the caterpillar. Particle production is confined to the wasp ovary where viral DNAs are generated from proviral copies maintained within the wasp genome. We recently showed that the genes involved in bracovirus particle production reside within the wasp genome and are related to nudiviruses. In the present work we characterized genes involved in ichnovirus particle production by analyzing the components of purified Hyposoter didymator Ichnovirus particles by LC-MS/MS and studying their organization in the wasp genome. Their products are conserved among ichnovirus-associated wasps and constitute a specific set of proteins in the virosphere. Strikingly, these genes are clustered in specialized regions of the wasp genome which are amplified along with proviral DNA during virus particle replication, but are not packaged in the particles. Clearly our results show that ichnoviruses and bracoviruses particles originated from different viral entities, thus providing an example of convergent evolution where two groups of wasps have independently domesticated viruses to deliver genes into their hosts.
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Affiliation(s)
- Anne-Nathalie Volkoff
- UMR 1231 INRA-Université Montpellier 2, Biologie Intégrative et Virologie des Insectes, Place Eugène Bataillon, Montpellier, France.
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16
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Grébaut P, Chuchana P, Brizard JP, Demettre E, Seveno M, Bossard G, Jouin P, Vincendeau P, Bengaly Z, Boulangé A, Cuny G, Holzmuller P. Identification of total and differentially expressed excreted-secreted proteins from Trypanosoma congolense strains exhibiting different virulence and pathogenicity. Int J Parasitol 2009; 39:1137-50. [PMID: 19285981 DOI: 10.1016/j.ijpara.2009.02.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Revised: 02/05/2009] [Accepted: 02/09/2009] [Indexed: 12/31/2022]
Abstract
Animal trypanosomosis is a major constraint to livestock productivity in the tropics and has a significant impact on the life of millions of people globally (mainly in Africa, South America and south-east Asia). In Africa, the disease in livestock is caused mainly by Trypanosoma congolense, Trypanosoma vivax, Trypanosoma evansi and Trypanosoma brucei brucei. The extracellular position of trypanosomes in the bloodstream of their host requires consideration of both the parasite and its naturally excreted-secreted factors (secretome) in the course of pathophysiological processes. We therefore developed and standardised a method to produce purified proteomes and secretomes of African trypanosomes. In this study, two strains of T. congolense exhibiting opposite properties of both virulence and pathogenicity were further investigated through their secretome expression and its involvement in host-parasite interactions. We used a combined proteomic approach (one-dimensional SDS-PAGE and two-dimensional differential in-gel electrophoresis coupled to mass spectrometry) to characterise the whole and differentially expressed protein contents of secretomes. The molecular identification of differentially expressed trypanosome molecules and their correlation with either the virulence process or pathogenicity are discussed with regard to their potential as new diagnostic or therapeutic tools against animal trypanosomosis.
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Affiliation(s)
- Pascal Grébaut
- CIRAD UMR 17 Trypanosomes (UMR 177 IRD-CIRAD Interactions Hôtes-Vecteurs-Parasites dans les Trypanosomoses), TA A-17/G, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France
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17
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Thouvenot E, Urbach S, Dantec C, Poncet J, Séveno M, Demettre E, Jouin P, Touchon J, Bockaert J, Marin P. Enhanced Detection of CNS Cell Secretome in Plasma Protein-Depleted Cerebrospinal Fluid. J Proteome Res 2008; 7:4409-21. [DOI: 10.1021/pr8003858] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Eric Thouvenot
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Serge Urbach
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Christelle Dantec
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Joël Poncet
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Martial Séveno
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Edith Demettre
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Patrick Jouin
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Jacques Touchon
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Joël Bockaert
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
| | - Philippe Marin
- Centre National de la Recherche Scientifique, UMR 5203, Institut de Génomique Fonctionnelle, Montpellier, France, Institut National de la Santé et de la Recherche Médicale, U661, Montpellier, F-34094 France, Université Montpellier 1, Montpellier, F-34094 France, Université Montpellier 2, Montpellier, F-34094 France, and Service de Neurologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, F-34295 France
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Lamarque M, Tastet C, Poncet J, Demettre E, Jouin P, Vial H, Dubremetz JF. Food vacuole proteome of the malarial parasite Plasmodium falciparum. Proteomics Clin Appl 2008; 2:1361-74. [PMID: 21136929 DOI: 10.1002/prca.200700112] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Indexed: 11/08/2022]
Abstract
The Plasmodium falciparum food vacuole (FV) is a lysosome-like organelle where erythrocyte hemoglobin digestion occurs. It is a favorite target in the development of antimalarials. We have used a tandem mass spectrometry approach to investigate the proteome of an FV-enriched fraction and identified 116 proteins. The electron microscopy analysis and the Western blot data showed that the major component of the fraction was the FV and, as expected, the majority of previously known FV markers were recovered. Of particular interest, several proteins involved in vesicle-mediated trafficking were identified, which are likely to play a key role in FV biogenesis and/or FV protein trafficking. Recovery of parasite surface proteins lends support to the cytostomal pathway of hemoglobin ingestion as a FV trafficking route. We have identified 32 proteins described as hypothetical in the databases. This insight into FV protein content provides new clues towards understanding the biological function of this organelle in P. falciparum.
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Affiliation(s)
- Mauld Lamarque
- Dynamique Moléculaire des Interactions Membranaires CNRS UMR 5235, Université Montpellier II, Montpellier, France
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19
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Alix E, Miki T, Felix C, Rang C, Figueroa-Bossi N, Demettre E, Blanc-Potard AB. Interplay between MgtC and PagC in Salmonella enterica serovar Typhimurium. Microb Pathog 2008; 45:236-40. [PMID: 18620040 DOI: 10.1016/j.micpath.2008.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2008] [Revised: 06/03/2008] [Accepted: 06/13/2008] [Indexed: 10/21/2022]
Abstract
In Salmonella enterica serovar Typhimurium, MgtC and PagC are positively regulated by the PhoP-PhoQ two-component system, which is activated under magnesium deprivation. Both MgtC and PagC are of unknown function but have been involved in intramacrophage survival. We have found that the amount of PagC is lowered in a DeltamgtC mutant strain grown in magnesium depleted medium. However, the effect of MgtC on PagC does not account for the growth defect of a DeltamgtC mutant in macrophages since, in contrast to previous reports, our results indicate that PagC does not contribute to intramacrophage survival. In addition, a pagC null mutant is only poorly attenuated in Nramp1-negative or Nramp1-positive mice. On the other hand, a mgtC null mutant is significantly more attenuated with Nramp1-positive than Nramp1-negative mice, suggesting that a functional Nramp1 (Slc11a1) further limits the multiplication of this mutant within the host.
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Affiliation(s)
- Eric Alix
- Inserm, ESPRI 26, Avenue J.F. Kennedy, 30908 Nîmes Cedex 02, France
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Lefevre T, Thomas F, Schwartz A, Levashina E, Blandin S, Brizard JP, Le Bourligu L, Demettre E, Renaud F, Biron DG. MalariaPlasmodium agent induces alteration in the head proteome of theirAnopheles mosquito host. Proteomics 2007; 7:1908-15. [PMID: 17464940 DOI: 10.1002/pmic.200601021] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Despite increasing evidence of behavioural manipulation of their vectors by pathogens, the underlying mechanisms causing infected vectors to act in ways that benefit pathogen transmission remain enigmatic in most cases. Here, 2-D DIGE coupled with MS were employed to analyse and compare the head proteome of mosquitoes (Anopheles gambiae sensu stricto (Giles)) infected with the malarial parasite (Plasmodium berghei) with that of uninfected mosquitoes. This approach detected altered levels of 12 protein spots in the head of mosquitoes infected with sporozoites. These proteins were subsequently identified using MS and functionally classified as belonging to metabolic, synaptic, molecular chaperone, signalling, and cytoskeletal groups. Our results indicate an altered energy metabolism in the head of sporozoite-infected mosquitoes. Some of the up-/down-regulated proteins identified, such as synapse-associated protein, 14-3-3 protein and calmodulin, have previously been shown to play critical roles in the CNS of both invertebrates and vertebrates. Furthermore, a heat shock response (HSP 20) and a variation of cytoarchitecture (tropomyosins) have been shown. Discovery of these proteins sheds light on potential molecular mechanisms that underlie behavioural modifications and offers new insights into the study of intimate interactions between Plasmodium and its Anopheles vector.
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21
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Thouvenot E, Lafon-Cazal M, Demettre E, Jouin P, Bockaert J, Marin P. The proteomic analysis of mouse choroid plexus secretome reveals a high protein secretion capacity of choroidal epithelial cells. Proteomics 2006; 6:5941-52. [PMID: 17051638 DOI: 10.1002/pmic.200600096] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Choroid plexuses (CP) are involved in multiple functions related to their unique architecture and localization at the interface between the blood and cerebrospinal fluid compartments. These include the release by choroidal epithelial cells (CEC) of biologically active molecules, such as polypeptides, which are distributed globally to the brain. Here, we have used a proteomic approach to get an unbiased overview of the proteins that are secreted by primary cultures enriched in epithelial cells from mice CP. We identified a total of 43 proteins secreted through the classical vesicular pathway in CEC -conditioned medium. They include transport proteins, collagen subunits and other cell matrix proteins, proteases, protease inhibitors and neurotrophic factors. Treating CEC cultures with lipopolysaccharide, increased the secretion of four protein species and induced the release of two additional proteins. Our study also reveals a higher protein secretion capacity of CECs compared with other CP cells or cultured astrocytes. In conclusion, this study provides for the first time the characterization of the major proteins that are secreted by CECs. These proteins may play a critical role in neuronal growth, differentiation and function as well as in brain pathologies.
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Tiev KP, Briant M, Ziani M, Cabane J, Demettre E, Lebleu B. Variability of the RNase L isoform ratio (37 kiloDaltons/83 kiloDaltons) in diagnosis of chronic fatigue syndrome. Clin Diagn Lab Immunol 2005; 12:366. [PMID: 15699437 PMCID: PMC549313 DOI: 10.1128/cdli.12.2.366.2005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Solassol J, Marin P, Demettre E, Rouanet P, Bockaert J, Maudelonde T, Mangé A. Proteomic detection of prostate-specific antigen using a serum fractionation procedure: potential implication for new low-abundance cancer biomarkers detection. Anal Biochem 2005; 338:26-31. [PMID: 15707932 DOI: 10.1016/j.ab.2004.11.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Indexed: 12/01/2022]
Abstract
One of the major obstacles in proteomic analysis of biological fluids is the presence of highly abundant proteins such as albumin and immunoglobulins, which can interfere with the resolution and sensitivity of the proteome profiling techniques used. In this paper, we describe an anion exchange fractionation procedure for serum using denaturating conditions allowing protein-protein interaction disruption before analysis by surface-enhanced laser desorption/ionization and by two-dimensional electrophoresis. This method simplifies the serum proteome into subproteomes and markedly increases resolution and sensitivity without any loss of minor proteins. To confirm the applicability of this method, fractionated serum of a patient with prostate cancer was analyzed for the presence of the prostate-specific antigen (PSA) which is a low-abundance tumor marker protein. The results demonstrate that PSA can be detected by two-dimensional electrophoresis only in serum following fractionation. Hence, this procedure may facilitate the identification of other, so far unknown, tumor markers in patient sera.
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Affiliation(s)
- Jérôme Solassol
- Hôpital Arnaud de Villeneuve, INSERM U540, 191 Avenue du Doyen Giraud, 34295 Montpellier Cedex 5, France.
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Tiev KP, Demettre E, Ercolano P, Bastide L, Lebleu B, Cabane J. RNase L levels in peripheral blood mononuclear cells: 37-kilodalton/83-kilodalton isoform ratio is a potential test for chronic fatigue syndrome. Clin Diagn Lab Immunol 2003; 10:315-6. [PMID: 12626460 PMCID: PMC150526 DOI: 10.1128/cdli.10.2.315-316.2003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Chronic fatigue syndrome (CFS) is a disorder characterized by debilitating fatigue associated with immunological abnormalities. The etiology remains unclear. A low-molecular-mass (37 kDa) isoform of RNase L has been described in peripheral blood mononuclear cell (PBMC) extracts, and the ratio of two isoforms of RNase L (37 kDa/83 kDa) has been proposed as a potential biochemical marker of CFS. In a prospective case-control study, we tested whether the RNase L 37-kDa/83-kDa ratio could discriminate a SFC population. We compared the ratio of RNase L isoforms in PBMCs from 11 patients with CFS (6 women and 5 men; mean age +/- standard deviation, 43.2 +/- 13.8 years) and PBMCs from 14 healthy well-matched volunteers (10 women and 4 men; age, 39.1 +/- 11.6 years). A ratio of RNase L of 0.4 used as a threshold allowed diagnosis of CFS with high sensitivity (91%; 95% confidence interval [CI], 57 to 99%) and specificity (71%; 95% CI, 41 to 90%). The positive and negative prognostic values were 71% (95% CI, 41 to 90%) and 91% (95% CI, 57 to 99%), respectively. In the absence of acute infection or chronic inflammation, a high RNase L ratio could distinguish CFS patients from healthy volunteers. Additional large studies and follow-up studies are required to confirm the stability of this high ratio of RNase L isoforms in a CFS group.
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Affiliation(s)
- Kiet Phong Tiev
- Service de Médecine Interne, Hôpital Saint Antoine, 75571 Paris Cedex 12, France.
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Demettre E, Bastide L, D'Haese A, De Smet K, De Meirleir K, Tiev KP, Englebienne P, Lebleu B. Ribonuclease L proteolysis in peripheral blood mononuclear cells of chronic fatigue syndrome patients. J Biol Chem 2002; 277:35746-51. [PMID: 12118002 DOI: 10.1074/jbc.m201263200] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 37-kDa binding polypeptide accumulates in peripheral blood mononuclear cell (PBMC) extracts from chronic fatigue syndrome (CFS) patients and is being considered as a potential diagnostic marker (De Meirleir, K., Bisbal, C., Campine, I., De Becker, P., Salehzada, T., Demettre, E., and Lebleu, B. (2000) Am. J. Med. 108, 99-105). We establish here that this low molecular weight 2-5A-binding polypeptide is a truncated form of the native 2-5A-dependent ribonuclease L (RNase L), generated by an increased proteolytic activity in CFS PBMC extracts. RNase L proteolysis in CFS PBMC extracts can be mimicked in a model system in which recombinant RNase L is treated with human leukocyte elastase. RNase L proteolysis leads to the accumulation of two major fragments with molecular masses of 37 and 30 kDa. The 37-kDa fragment includes the 2-5A binding site and the N-terminal end of native RNase L. The 30-kDa fragment includes the catalytic site in the C-terminal part of RNase L. Interestingly, RNase L remains active and 2-5A-dependent when degraded into its 30- and 37-kDa fragments by proteases of CFS PBMC extract or by purified human leukocyte elastase. The 2-5A-dependent nuclease activity of the truncated RNase L could result from the association of these digestion products, as suggested in pull down experiments.
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Affiliation(s)
- Edith Demettre
- UMR 5124 CNRS, Université Montpellier 2, 34293 Montpellier, France
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De Meirleir K, Bisbal C, Campine I, De Becker P, Salehzada T, Demettre E, Lebleu B. A 37 kDa 2-5A binding protein as a potential biochemical marker for chronic fatigue syndrome. Am J Med 2000; 108:99-105. [PMID: 11126321 DOI: 10.1016/s0002-9343(99)00300-9] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE Recent studies have revealed abnormalities in the ribonuclease L pathway in peripheral blood mononuclear cells of patients with the chronic fatigue syndrome. We conducted a blinded study to detect possible differences in the distribution of 2-5A binding proteins in the cells of patients with chronic fatigue syndrome and controls. PATIENTS AND METHODS We studied 57 patients with chronic fatigue syndrome and 53 control subjects (28 healthy subjects and 25 patients with depression or fibromyalgia). A radioactive probe was used to label 2-5A binding proteins in unfractionated peripheral blood mononuclear cell extracts and to compare their distribution in the three groups. RESULTS A 37 kDa 2-5A binding polypeptide was found in 50 (88%) of the 57 patients with chronic fatigue syndrome compared with 15 (28%) of the 53 controls (P < 0.01). When present, the amount of 37 kDa protein was very low in the control groups. When expressed as the ratio of the 37 kDa protein to the 80 kDa protein, 41 (72%) of the 57 patients with chronic fatigue syndrome had a ratio > 0.05, compared with 3 (11%) of the 28 healthy subjects and none of the patients with fibromyalgia or depression. CONCLUSION The presence of a 37 kDa 2-5A binding protein in extracts of peripheral blood mononuclear cells may distinguish patients with chronic fatigue syndrome from healthy subjects and those suffering from other diseases.
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Affiliation(s)
- K De Meirleir
- Department of Human Physiology and Medicine, Vrije Universiteit Brussels, Belgium
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