{"id":9292,"date":"2026-05-05T11:08:00","date_gmt":"2026-05-05T09:08:00","guid":{"rendered":"https:\/\/fhu-premimpact.org\/?page_id=9292"},"modified":"2026-05-05T11:32:30","modified_gmt":"2026-05-05T09:32:30","slug":"les-equipes-de-linstitut-pasteur","status":"publish","type":"page","link":"https:\/\/fhu-premimpact.org\/en\/recherche\/les-equipes-de-recherche\/les-equipes-de-linstitut-pasteur\/","title":{"rendered":"Les \u00e9quipes de l&#8217;Institut Pasteur"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Team \u00ab&nbsp;Metaorganisms&nbsp;\u00bb &#8211; Pre Yasmine Belkaid<\/h2>\n\n\n\n<p>Elle explore les m\u00e9canismes fondamentaux qui r\u00e9gulent l\u2019hom\u00e9ostasie tissulaire et les r\u00e9ponses immunitaires de l\u2019h\u00f4te. Elle a ainsi mis en \u00e9vidence les r\u00f4les cl\u00e9s du microbiote et des facteurs alimentaires dans le contr\u00f4le de l\u2019immunit\u00e9 et la protection contre les agents pathog\u00e8nes. Elle \u00e9tudie \u00e9galement le r\u00f4le du syst\u00e8me immunitaire dans le remodelage de l\u2019organisme et l\u2019impact des infections sur la dyade m\u00e8re-enfant.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Team \u00ab&nbsp;Macrophages and endothelium&nbsp;\u00bb &#8211; Dre Elisa Gomez Perdiguero<\/h2>\n\n\n\n<p>Nous \u00e9tudions comment l\u2019embryon g\u00e9n\u00e8re la diversit\u00e9 des cellules sanguines et immunitaires (globules rouges, plaquettes, lymphocytes, macrophages), un processus complexe et temporellement r\u00e9gul\u00e9. Comprendre cette \u00ab chor\u00e9graphie cellulaire \u00bb est essentiel pour expliquer les troubles h\u00e9matologiques p\u00e9diatriques, souvent diff\u00e9rents de ceux de l\u2019adulte : certains se r\u00e9solvent spontan\u00e9ment, tandis que d\u2019autres, comme les h\u00e9moglobinopathies, restent asymptomatiques \u00e0 la naissance.<\/p>\n\n\n\n<p>Les chercheurs s\u2019int\u00e9ressent particuli\u00e8rement aux prog\u00e9niteurs \u00e9rythro\u00efdes\/my\u00e9lo\u00efdes (EMP), issus de l\u2019endoth\u00e9lium h\u00e9mog\u00e9nique du sac vitellin, premier site de production sanguine embryonnaire. Longtemps consid\u00e9r\u00e9s comme transitoires, les EMP r\u00e9v\u00e8lent une dynamique plus complexe que pr\u00e9vu. Leur \u00e9tude, publi\u00e9e dans Immunity, montre que les EMP passent par deux phases de diff\u00e9renciation : d\u2019abord dans le sac vitellin, o\u00f9 ils forment rapidement macrophages et m\u00e9gacaryocytes ; ensuite, plus tard, en migrant vers le foie f\u0153tal pour produire une vari\u00e9t\u00e9 de cellules (\u00e9rythrocytes, monocytes, granulocytes, mastocytes).<\/p>\n\n\n\n<p>Les m\u00e9gacaryocytes, sources des plaquettes, proviennent de deux voies distinctes impliquant les EMP. Leur production pr\u00e9coce est cruciale pour la coagulation, l\u2019h\u00e9mostase et la s\u00e9paration des syst\u00e8mes sanguin et lymphatique. Ces travaux r\u00e9v\u00e8lent une h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9 inattendue des EMP et une diff\u00e9renciation plus complexe que celle d\u00e9crite pr\u00e9c\u00e9demment, ouvrant de nouvelles perspectives pour la compr\u00e9hension des maladies du sang chez l\u2019enfant.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"720\" src=\"https:\/\/fhu-premimpact.org\/wp-content\/uploads\/2026\/05\/schema-eq-Elisa-Gomez-P.jpg\" alt=\"\" class=\"wp-image-9294\" srcset=\"https:\/\/fhu-premimpact.org\/wp-content\/uploads\/2026\/05\/schema-eq-Elisa-Gomez-P.jpg 720w, https:\/\/fhu-premimpact.org\/wp-content\/uploads\/2026\/05\/schema-eq-Elisa-Gomez-P-300x300.jpg 300w, https:\/\/fhu-premimpact.org\/wp-content\/uploads\/2026\/05\/schema-eq-Elisa-Gomez-P-150x150.jpg 150w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\"><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Team \u00ab\u00a0Microenvironment and immunity\u00a0\u00bb &#8211; Pr G\u00e9rard Eberl<\/h2>\n\n\n\n<p><strong>Le syst\u00e8me immunitaire, le syst\u00e8me nerveux et les microbes symbiotiques interagissent \u00e0 de nombreux niveaux pour faire face aux menaces pesant sur l&#8217;individu et maintenir l&#8217;hom\u00e9ostasie.<\/strong><\/p>\n\n\n\n<p>Le microbiote intestinal joue un r\u00f4le central dans le d\u00e9veloppement et la r\u00e9gulation du syst\u00e8me immunitaire, notamment en stimulant la formation de tissus lympho\u00efdes dans l\u2019intestin apr\u00e8s la naissance. Les bact\u00e9ries lib\u00e8rent des muropeptides, d\u00e9tect\u00e9s par le r\u00e9cepteur Nod1 des cellules \u00e9pith\u00e9liales, ce qui active des cellules immunitaires (comme les LTi et les lymphocytes B IgA+), r\u00e9gulant ainsi le microbiote pour \u00e9viter les d\u00e9s\u00e9quilibres.<\/p>\n\n\n\n<p>Le microbiote influence aussi la diff\u00e9renciation de cellules immunitaires (ILC, Th17, iTreg). Son alt\u00e9ration peut entra\u00eener des maladies inflammatoires chroniques, allergies ou auto-immunes. Pendant le sevrage, une \u00ab r\u00e9action de sevrage \u00bb se produit, marquant durablement la r\u00e9activit\u00e9 immunitaire (empreinte n\u00e9onatale). Une perturbation de cette phase augmente le risque de pathologies inflammatoires \u00e0 l\u2019\u00e2ge adulte.<\/p>\n\n\n\n<p>Le syst\u00e8me nerveux et le syst\u00e8me immunitaire partagent des m\u00e9canismes de d\u00e9tection et de m\u00e9moire pour r\u00e9pondre aux menaces (antig\u00e8nes, l\u00e9sions, temp\u00e9rature, etc.). Ils agissent de mani\u00e8re compl\u00e9mentaire, notamment lors de l\u2019ingestion d\u2019aliments, o\u00f9 des neuropeptides renforcent l\u2019action des cellules immunitaires intestinales contre les pathog\u00e8nes.<\/p>\n\n\n\n<p>Enfin, le microbiote communique directement avec le syst\u00e8me nerveux central : les muropeptides bact\u00e9riens atteignent l\u2019hypothalamus, modulant l\u2019app\u00e9tit et la temp\u00e9rature corporelle. Des souris sans r\u00e9cepteur Nod2 d\u00e9veloppent ob\u00e9sit\u00e9 et troubles thermiques. Le stress chronique alt\u00e8re aussi le microbiote, r\u00e9duisant la production de tryptophane et d\u2019autres m\u00e9tabolites, favorisant des sympt\u00f4mes d\u00e9pressifs transmissibles \u00e0 un nouvel h\u00f4te.<\/p>\n\n\n\n<p>En r\u00e9sum\u00e9, ces trois syst\u00e8mes s\u2019influencent mutuellement pour assurer la sant\u00e9 et la survie de l\u2019individu<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">National Reference Center List\u00e9ria &#8211; Pr Marc Lecuit<\/h2>\n\n\n\n<p>L\u2019unit\u00e9 de Biologie des Infections (Institut Pasteur, Inserm) s\u2019int\u00e9resse \u00e0 la compr\u00e9hension des m\u00e9canismes infectieux, tant du point de vue de l\u2019h\u00f4te que du pathog\u00e8ne. Elle se concentre plus particuli\u00e8rement sur les infections invasives touchant le syst\u00e8me nerveux central, ainsi que sur les infections materno-f\u0153tales et n\u00e9onatales. Dans ce contexte, nous \u00e9tudions le pathog\u00e8ne mod\u00e8le Listeria monocytogenes, responsable d\u2019infections materno-f\u0153tales pouvant conduire \u00e0 des fausses couches, des avortements, des accouchements pr\u00e9matur\u00e9s, ainsi que des infections f\u0153tales et n\u00e9onatales syst\u00e9miques et neurologiques. Gr\u00e2ce au Centre National de R\u00e9f\u00e9rence et Centre Collaborateur de l\u2019OMS <em>Listeria<\/em>, qui est associ\u00e9 \u00e0 notre laboratoire, nous combinons des \u00e9tudes \u00e9pid\u00e9miologiques, cliniques, microbiologiques, immunologiques, cellulaires, g\u00e9n\u00e9tiques et physiopathologiques humaines et exp\u00e9rimentales, men\u00e9es selon une approche multidisciplinaire et int\u00e9grative, afin de comprendre les m\u00e9canismes de l\u2019infection maternelle, placentaire et f\u0153tale et ses cons\u00e9quences imm\u00e9diates et \u00e0 long terme chez la m\u00e8re et l\u2019enfant. L\u2019expertise que nous avons d\u00e9velopp\u00e9e est \u00e9galement mise \u00e0 profit pour l\u2019\u00e9tude des infections li\u00e9es aux virus \u00e9mergents qui pr\u00e9sentent un tropisme similaire \u00e0 <em>Listeria monocytogenes<\/em>. Dans ce cadre, notre laboratoire a contribu\u00e9 \u00e0 la compr\u00e9hension des infections li\u00e9es aux virus chikungunya et Zika, \u00e0 l&#8217;ent\u00e9rovirus 71 et au Sars-CoV-2.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Team \u00ab&nbsp;Metaorganisms&nbsp;\u00bb &#8211; Pre Yasmine Belkaid Elle explore les m\u00e9canismes fondamentaux qui r\u00e9gulent l\u2019hom\u00e9ostasie tissulaire et les r\u00e9ponses immunitaires de l\u2019h\u00f4te. Elle a ainsi mis en \u00e9vidence les r\u00f4les cl\u00e9s du microbiote et des facteurs alimentaires dans le contr\u00f4le de l\u2019immunit\u00e9 et la protection contre les agents pathog\u00e8nes. Elle \u00e9tudie \u00e9galement le r\u00f4le du syst\u00e8me [&hellip;]<\/p>\n","protected":false},"author":87,"featured_media":0,"parent":242,"menu_order":16,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-9292","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les \u00e9quipes de l&#039;Institut Pasteur - FHU Prem&#039;IMPACT<\/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:\/\/fhu-premimpact.org\/en\/recherche\/les-equipes-de-recherche\/les-equipes-de-linstitut-pasteur\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les \u00e9quipes de l&#039;Institut Pasteur - FHU Prem&#039;IMPACT\" \/>\n<meta property=\"og:description\" content=\"Team \u00ab&nbsp;Metaorganisms&nbsp;\u00bb &#8211; Pre Yasmine Belkaid Elle explore les m\u00e9canismes fondamentaux qui r\u00e9gulent l\u2019hom\u00e9ostasie tissulaire et les r\u00e9ponses immunitaires de l\u2019h\u00f4te. 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