{"id":463,"date":"2017-12-03T21:35:11","date_gmt":"2017-12-03T20:35:11","guid":{"rendered":"https:\/\/www.nature-conservation-ubfc.com\/dycob\/?p=463"},"modified":"2017-12-03T21:35:11","modified_gmt":"2017-12-03T20:35:11","slug":"soutenance-de-these-de-julien-dhinaut","status":"publish","type":"post","link":"https:\/\/www.nature-conservation-ubfc.com\/dycob\/soutenance-de-these-de-julien-dhinaut\/","title":{"rendered":"Soutenance de th\u00e8se de Julien Dhinaut"},"content":{"rendered":"<p>Julien Dhinaut soutiendra sa th\u00e8se mercredi 6 d\u00e9cembre \u00e0 14h40, Amphi Billet<br \/>\n<!--more--><\/p>\n<p><strong>\u00ab\u00a0\u00c9cologie \u00e9volutive du priming immunitaire chez le t\u00e9n\u00e9brion meunier, Tenebrio molitor\u00a0\u00bb<\/strong><\/p>\n<p>R\u00e9sum\u00e9: Il est maintenant connu que de nombreux invert\u00e9br\u00e9s peuvent moduler leur r\u00e9ponse immunitaire en fonction de leur exp\u00e9rience immunologique. Ce ph\u00e9nom\u00e8ne est appel\u00e9 priming immunitaire. Si les m\u00e9canismes du priming immunitaire restent encore assez m\u00e9connus, il a pour cons\u00e9quence d\u2019apporter un b\u00e9n\u00e9fice aux individus lors d\u2019une seconde rencontre avec un agent pathog\u00e8ne, via une \u00e9l\u00e9vation de leur immunocomp\u00e9tence. Une caract\u00e9ristique assez \u00e9tonnante du priming immunitaire est qu\u2019il peut se manifester chez la descendance. Ce transfert trans-g\u00e9n\u00e9rationnel d\u2019immunit\u00e9 (TTGI), ainsi que le priming immunitaire, doivent avoir \u00e9volu\u00e9s \u00e0 la suite de challenges r\u00e9p\u00e9titifs par les m\u00eames agents pathog\u00e8nes durant la vie des individus et au fil des g\u00e9n\u00e9rations. Ainsi, le priming et le TTGI doivent \u00eatre plus efficaces et moins co\u00fbteux vis \u00e0 vis des parasites exposant l\u2019h\u00f4te \u00e0 la plus grande probabilit\u00e9 de r\u00e9infection. De plus, il est maintenant prouv\u00e9 que la r\u00e9ponse immunitaire chez les insectes est g\u00e9n\u00e9tiquement variable. Pour comprendre l\u2019\u00e9volution du TTGI et de son potentiel de r\u00e9ponse \u00e0 la s\u00e9lection, il convient d\u2019\u00e9tudier la composante g\u00e9n\u00e9tique de sa variabilit\u00e9. Au cours de cette th\u00e8se, l\u2019expression du priming et du TTGI chez un insecte a \u00e9t\u00e9 associ\u00e9e \u00e0 un type de bact\u00e9ries, qui a du agir comme la principale pression de s\u00e9lection sur le syst\u00e8me immunitaire de cette esp\u00e8ce h\u00f4te. Cela s\u2019est fait via l\u2019identification de diff\u00e9rents co\u00fbts et b\u00e9n\u00e9fices, qui ont \u00e9galement mis en exergue certains m\u00e9canismes possibles dans la r\u00e9alisation de ces ph\u00e9nom\u00e8nes immunitaires. Pour ce faire, j\u2019ai utilis\u00e9 comme organisme mod\u00e8le le t\u00e9n\u00e9brion meunier, Tenebrio molitor. Les b\u00e9n\u00e9fices et les co\u00fbts associ\u00e9s au priming ainsi qu\u2019au TTGI sugg\u00e8rent que les bact\u00e9ries \u00e0 Gram-positif ont \u00e9t\u00e9 la principale pression de s\u00e9lection ayant contraint l\u2019\u00e9volution du syst\u00e8me immunitaire de T. molitor. En ce qui concerne le TTGI, de plus amples recherches sont n\u00e9cessaires afin de trancher quant \u00e0 l\u2019existence de bases g\u00e9n\u00e9tiques associ\u00e9es au ph\u00e9nom\u00e8ne.<\/p>\n<p><strong>Composition du Jury:<\/strong><br \/>\nMeunier Jo\u00ebl (CR CNRS, Universit\u00e9 de Tours)<br \/>\nTasiemski Aur\u00e9lie (Mcf, Universit\u00e9 de Lille)<br \/>\nGourbal Benjamin (Mcf, Universit\u00e9 de Perpignan)<br \/>\nCoustau Christine (DR CNRS, Sophia Agrobiotech)<br \/>\nRigaud Thierry (DR CNRS, Universit\u00e9 de Bourgogne Franche-Comt\u00e9)<br \/>\nMoret Yannick (Directeur de th\u00e8se. DR CNRS, Universit\u00e9 de Bourgogne Franche-Comt\u00e9)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Julien Dhinaut soutiendra sa th\u00e8se mercredi 6 d\u00e9cembre \u00e0 14h40, Amphi Billet<\/p>\n","protected":false},"author":5,"featured_media":462,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[10],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Soutenance de th\u00e8se de Julien Dhinaut - DYCOB<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.nature-conservation-ubfc.com\/dycob\/soutenance-de-these-de-julien-dhinaut\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soutenance de th\u00e8se de Julien Dhinaut - 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