Analysis of the proteome and the secretome of animal trypanosomes : a standardized analytical method to look for new molecular targets

Grébaut Pascal, Bengaly Zakaria, Brizard Jean-Paul, Peltier Jean-Benoît, Courtois Pierrette, Daulouède Sylvie, Vincendeau Philippe, Cuny Gérard, Frutos Roger, Boulangé Alain, Holzmuller Philippe. 2007. Analysis of the proteome and the secretome of animal trypanosomes : a standardized analytical method to look for new molecular targets. In : 29th ISCTRC Conference, Luanda, Angola, 1st-5th October 2007. s.l. : s.n., 8 p. ISCTRC Conference. 29, Luanda, Angola, 1 October 2007/5 October 2007.

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Abstract : The causative agents of animal trypanosomosis are various species of protozoan parasites belonging to the genus Trypanosoma, among which T. congolense and T. evansi are the major pathogenic species. The extra cellular position of the trypanosomes implies to consider both the parasite and its excretedsecreted factors in the course of the physiopathological processes. Proteome (i.e. parasite constitutive proteins) and secretome (i.e. naturally excreted-secreted proteins) analysis need to be conducted in parallel to identify key trypanosome¿s proteins potentially involved in both virulence and pathogenicity. We developed and standardised a method to produce purified proteome and secretome of the two sub-genus Trypanozoon and Nannomonas. The protocol is based on the production of trypanosome bloodstream forms by infection of naturally immunosupressed rodents (Nude/SOPF®) and incubated in a defined secretion medium that mimics the blood biochemical environment deprived of cells and macromolecules. Supernatants representing secretome are separated from parasites pellets representing proteome by centrifugation and filtration and both are conditioned for further analysis in two-dimensional gel electrophoresis and mass spectrometry. The defined secretion medium appears to reduced expression of stress proteins. Two-dimensional difference gel electrophoresis (2-D DIGE) analysis of secretomes in particular confirmed both the differences observed in 1-D gels and the high reproducibility between secretome batches of a same trypanosome strain. The molecular identification of differentially expressed trypanosomes molecules correlated with either the virulence process or the pathogenicity will provide new potential molecular targets. (Résumé d'auteur)

Mots-clés Agrovoc : Trypanosoma congolense, Protéine microbienne

Mots-clés complémentaires : Protéomique

Classification Agris : L73 - Animal diseases

Auteurs et affiliations

  • Grébaut Pascal, IRD (FRA)
  • Bengaly Zakaria, CIRDES (BFA)
  • Brizard Jean-Paul, CNRS (FRA)
  • Peltier Jean-Benoît, CNRS (FRA)
  • Courtois Pierrette, Université de Bordeaux II (FRA)
  • Daulouède Sylvie, Université de Bordeaux II (FRA)
  • Vincendeau Philippe, Université de Bordeaux II (FRA)
  • Cuny Gérard, IRD (FRA)
  • Holzmuller Philippe, CIRAD-BIOS-UMR TRYPANOSOMES (FRA) ORCID: 0000-0002-8919-9081

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