Identification of a Tsal1(52-75) salivary synthetic peptide to monitor cattle exposure to tsetse flies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Parasites & Vectors Année : 2016

Identification of a Tsal1(52-75) salivary synthetic peptide to monitor cattle exposure to tsetse flies

Sylvie Cornelie
Franck Remoue

Résumé

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 Tsal1(52-75) synthetic peptide were shown to be specific of tsetse exposure in both naturally and experimentally exposed hosts. Nevertheless, anti-Tsal1(52-75) IgG responses were absent in animals exposed to high tsetse biting rates. Conclusions: These results suggest that Tsal1(52-75) 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.
Fichier principal
Vignette du fichier
Somda 2016 Parasites & Vectors_{A40723B0-74F4-4CD2-A552-5819CDC4F57A}.pdf (1.52 Mo) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-01511984 , version 1 (21-04-2017)

Licence

Paternité

Identifiants

Citer

Martin Bienvenu Somda, Sylvie Cornelie, Zakaria Bengaly, Françoise Mathieu-Daude, Anne Poinsignon, et al.. Identification of a Tsal1(52-75) salivary synthetic peptide to monitor cattle exposure to tsetse flies. Parasites & Vectors, 2016, 9, pp.12. ⟨10.1186/s13071-016-1414-8⟩. ⟨hal-01511984⟩
316 Consultations
85 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More