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<dc:title xml:lang="fr">Identification de nouveaux marqueurs par l'infection par T. gondii.</dc:title>
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<dc:subject xml:lang="fr">T. gondii</dc:subject>
<dc:subject xml:lang="fr">Toxoplasmose aigue</dc:subject>
<dc:subject xml:lang="fr">Toxoplasmose chronique</dc:subject>
<dc:subject xml:lang="fr">Cytokinome</dc:subject>
<dc:subject xml:lang="fr">Sérotypage</dc:subject>
<dc:subject xml:lang="en">T. gondii</dc:subject>
<dc:subject xml:lang="en">Acute toxoplasmosis</dc:subject>
<dc:subject xml:lang="en">Chronic toxoplasmosis</dc:subject>
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<dcterms:abstract xml:lang="fr">L’infection à T. gondii est bégnine mais peut s’avérer grave et même fatale chez certains patients. Son diagnostic est sérologique et permet de préciser le stade de l’infection : évolutif (TE) ou chronique (TCh). Préciser le stade peut nécessiter des examens complémentaires ou multiples. Pour déterminer de nouveaux marqueurs du stade infectieux, nous avons exploré la dynamique d’évolution de 23 cytokines dans le sérum de femmes enceintes non infectées (NI), en phase de TE et TCh. En phase TE, la réponse Th1 est significativement augmentée et on montre une diminution rapide et significative des cytokines avec le titre des IgG. En phase de TCh, les taux de TNF-α, l’IL-17A et le CSF3 sont inférieurs à ceux des NI et TE. T. gondii est une espèce unique qui présente une diversité de génotype en lien avec la virulence clinique. Pour développer un test indirect de typage, nous avons utilisé une approche expérimentale qui nous a permis d’identifier 727 protéines antigéniques de T. gondii. L’analyse du polymorphisme de ces protéines à partir de données WGS de 117 souches génotypées n’a pas permis d’identifier de mutation type spécifique permettant de discriminer les différents types de souches</dcterms:abstract>
<dcterms:abstract xml:lang="en">T. gondii infection is mild but can be serious and even fatal in some patients. Its diagnosis is serological and makes it possible to specify the stage of the infection: acute (TA) or chronic (TCh). Specifying the stage may require additional or multiple examinations. To determine new markers of the infectious stage, we explored the dynamics of the evolution of 23 cytokines from sera of uninfected pregnant women (NI), with acute (TA) or chronic infection (TCh). For TA, Th1 response is significantly increased and a rapid and significant decrease in cytokines correlates with IgG kinetics. For TCh, levels of TNF-α, IL-17A, and CSF3 are lower than NI and TA patients.T. gondii is a unique species that exhibits genotype diversity related to clinical virulence. To develop an indirect typing test, we used an experimental approach that allowed us to identify 727 antigenic proteins of T. gondii. The analysis of the polymorphism of these proteins using WGS data from 117 genotyped strains does not allow identification of any specific type mutation making it possible to discriminate between the different types of strain.</dcterms:abstract>
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