{"id":12298,"date":"2024-09-04T13:43:17","date_gmt":"2024-09-04T11:43:17","guid":{"rendered":"https:\/\/iph-multisite.berta-bewegt.ch\/?p=12298"},"modified":"2026-03-03T10:33:38","modified_gmt":"2026-03-03T09:33:38","slug":"naeher-an-der-loesung-des-praeeklampsie-raetsels-in-vitro-trophoblastzellen-in-aktion","status":"publish","type":"post","link":"https:\/\/www.interpharma.ch\/fr\/blog\/naeher-an-der-loesung-des-praeeklampsie-raetsels-in-vitro-trophoblastzellen-in-aktion\/","title":{"rendered":"S\u00e9rie de blogs d\u2019\u00e9t\u00e9 en collaboration avec le 3RCC Partie 4: Le myst\u00e8re de la pr\u00e9\u00e9clampsie en passe d\u2019\u00eatre r\u00e9solu: les cellules trophoblastiques in vitro en action!"},"content":{"rendered":"\n<p>La pr\u00e9\u00e9clampsie est une complication grave de la grossesse qui touche 5 \u00e0 8% de toutes les grossesses et c\u2019est l\u2019une des principales causes de mortalit\u00e9 materno-f\u0153tale dans le monde. Malgr\u00e9 sa pr\u00e9valence, la cause exacte de la pr\u00e9\u00e9clampsie reste floue, ce qui complique la mise au point de traitements efficaces. Une compr\u00e9hension approfondie et une mod\u00e9lisation pr\u00e9cise de cette maladie sont des <strong>\u00e9tapes essentielles pour am\u00e9liorer la sant\u00e9 de la m\u00e8re et du f\u0153tus.<\/strong><strong><\/strong><\/p>\n\n\n\n<p>Par le pass\u00e9, des mod\u00e8les animaux qui imitent la pr\u00e9\u00e9clampsie ont aid\u00e9 les scientifiques \u00e0 comprendre cette maladie. Cependant, une \u00e9quipe de l\u2019Universit\u00e9 de Berne, <a href=\"https:\/\/swiss3rcc.org\/funded-projects\/2019-call-engineering-a-novel-cell-based-model-for-assessing-materno-fetal-drug-transfer-during-pregnancy\">financ\u00e9e par le 3RCC<\/a> en 2019 et dirig\u00e9e par la professeure Christiane Albrecht, <strong>utilise avec succ\u00e8s des cellules sp\u00e9cifiques du placenta humain, appel\u00e9es trophoblastes<\/strong>, <strong>pour \u00e9tudier la pr\u00e9\u00e9clampsie in vitro<sup>1<\/sup><\/strong>, \u00e9vitant ainsi le recours \u00e0 des mod\u00e8les animaux. La pr\u00e9\u00e9clampsie est souvent associ\u00e9e \u00e0 une hypoxie (faible apport d\u2019oxyg\u00e8ne au placenta) qui, par exemple, peut entraver la formation ad\u00e9quate des vaisseaux sanguins. En imitant l\u2019hypoxie en laboratoire, les chercheurs ont reproduit des caract\u00e9ristiques cl\u00e9s observ\u00e9es dans la pr\u00e9\u00e9clampsie, notamment les marqueurs de l\u2019angiogen\u00e8se<sup>2<\/sup>, du stress oxydatif<sup>3<\/sup> et de l\u2019inflammation. Leur \u00e9tude, publi\u00e9e dans <em>Cells<\/em>, sugg\u00e8re que ce nouveau mod\u00e8le cellulaire peut nous aider \u00e0 mieux comprendre cette condition.<\/p>\n\n\n\n<p>L\u2019\u00e9quipe d\u00e9veloppe un mod\u00e8le avanc\u00e9 de co-culture in vitro (un mod\u00e8le utilis\u00e9 pour \u00e9tudier la mani\u00e8re dont diff\u00e9rentes cellules interagissent entre elles ou avec leur environnement) utilisant des trophoblastes et d\u2019autres cellules pour recr\u00e9er la barri\u00e8re h\u00e9mato-placentaire, <strong>imitant<\/strong> <strong>la structure du placenta et son fonctionnement. <\/strong>Ce mod\u00e8le utilise un syst\u00e8me microfluidique, qui simule la fa\u00e7on dont les choses circulent dans le corps, et \u00abserait tr\u00e8s utile pour tester les m\u00e9dicaments administr\u00e9s pendant la grossesse et v\u00e9rifier leur capacit\u00e9 de transfert materno-f\u0153tal\u00bb, explique la Dre Albrecht. \u00c0 l\u2019heure actuelle, les m\u00e9decins ne sont souvent pas en mesure de d\u00e9terminer avec certitude si un m\u00e9dicament est sans danger pendant la grossesse. Le travail de la professeure Albrecht pourrait changer la donne en <strong>fournissant un<\/strong> <strong>moyen s\u00fbr de tester les m\u00e9dicaments avant qu\u2019ils ne soient utilis\u00e9s chez les patientes enceintes<\/strong>. En outre, l\u2019\u00e9quipe travaille \u00e0 r\u00e9duire l\u2019utilisation de produits d\u2019origine animale dans son syst\u00e8mede culture<sup>4<\/sup>, en collaboration avec l\u2019industrie pharmaceutique.<\/p>\n\n\n\n<p>Align\u00e9 sur le principe des 3R, le mod\u00e8le d\u00e9velopp\u00e9 par le laboratoire de Christiane Albrecht pr\u00e9sente non seulement des avantages significatifs pour remplacer et r\u00e9duire l\u2019utilisation d\u2019animaux et de produits d\u2019origine animale dans cet axe de recherche, mais il <strong>pr\u00e9sente \u00e9galement un grand potentiel pour faire progresser notre compr\u00e9hension de la pr\u00e9\u00e9clampsie <\/strong>et peut donc mener \u00e0 de meilleures strat\u00e9gies th\u00e9rapeutiques pour lutter contre cette maladie mortelle. <\/p>\n\n\n\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><sup>1<\/sup> \u00abIn vitro\u00bb est un terme latin qui se traduit par \u00absous verre\u00bb. Dans un contexte scientifique, il s\u2019agit d\u2019exp\u00e9riences ou de processus men\u00e9s en dehors d\u2019un organisme vivant, g\u00e9n\u00e9ralement dans un environnement de laboratoire contr\u00f4l\u00e9. Les exp\u00e9riences in vitro font souvent appel \u00e0 des cellules, des tissus ou des organes isol\u00e9s, ce qui permet aux chercheurs d\u2019\u00e9tudier des ph\u00e9nom\u00e8nes biologiques dans des conditions contr\u00f4l\u00e9es. Cette approche est couramment utilis\u00e9e dans des domaines tels que la biologie cellulaire, la microbiologie, la pharmacologie et la toxicologie pour \u00e9tudier les processus cellulaires, les effets des m\u00e9dicaments, les m\u00e9canismes pathologiques, etc.<\/p>\n\n\n\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><sup>2 <\/sup>Angiogen\u00e8se: formation de nouveaux vaisseaux sanguins.<sup><\/sup><\/p>\n\n\n\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><sup>3 <\/sup>Stress oxydatif: se produit lorsque le corps contient trop de mol\u00e9cules nocives, appel\u00e9es radicaux libres, susceptibles d\u2019endommager les cellules.<\/p>\n\n\n\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><sup>4 <\/sup>Un syst\u00e8me de culture est un environnement contr\u00f4l\u00e9 con\u00e7u pour soutenir la croissance et le d\u00e9veloppement de cellules, de tissus ou de micro-organismes en dehors de leur contexte naturel, g\u00e9n\u00e9ralement en laboratoire.<\/p>\n\n\n\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><sup>5 <\/sup><a href=\"https:\/\/swiss3rcc.org\/description-on-the-3rs\">Principe des 3R:<\/a> les principe des 3R (Replacement, Reduction and Refinement, c\u2019est-\u00e0-dire remplacer, r\u00e9duire et raffiner) concernant l\u2019exp\u00e9rimentation animale ont \u00e9t\u00e9 \u00e9labor\u00e9s en 1959 par William Russell et Rex Burch dans un livre intitul\u00e9 Principles of Humane Experimental Technique. Ces principes sont aujourd\u2019hui largement reconnus \u00e0 l\u2019\u00e9chelle internationale par les scientifiques comme une obligation morale. Ils sont en outre mis en \u0153uvre dans de nombreuses l\u00e9gislations nationales relatives \u00e0 la protection des animaux.<\/p>\n\n\n\n<p>Auteurs: Christopher Cederroth, Jessica Lampe &amp; Robbie I\u2019Anson Price, Swiss 3R Competence Centre.<\/p>\n\n\n\n<p>R\u00e9f\u00e9rence: Fuenzalida B, Kallol S, Zaugg J, Mueller M, Mistry HD, Gutierrez J, Leiva A, Albrecht C. (2022). Primary Human Trophoblasts Mimic the Preeclampsia Phenotype after Acute Hypoxia\u2013Reoxygenation Insult.Cells. 11:1898. <a href=\"https:\/\/doi.org\/10.3390\/cells11121898\">https:\/\/doi.org\/10.3390\/cells11121898<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La pr\u00e9\u00e9clampsie est une complication grave de la grossesse qui touche 5 \u00e0 8% de toutes les grossesses et c\u2019est l\u2019une des principales causes de mortalit\u00e9 materno-f\u0153tale dans le monde. Malgr\u00e9 sa pr\u00e9valence, la cause exacte de la pr\u00e9\u00e9clampsie reste floue, ce qui complique la mise au point de traitements efficaces. Une compr\u00e9hension approfondie et [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3325,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"tags":[],"class_list":["post-12298","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>S\u00e9rie de blogs d\u2019\u00e9t\u00e9 en collaboration avec le 3RCC Partie 4: Le myst\u00e8re de la pr\u00e9\u00e9clampsie en passe d\u2019\u00eatre r\u00e9solu: les cellules trophoblastiques in vitro en action! - Interpharma<\/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.interpharma.ch\/fr\/blog\/naeher-an-der-loesung-des-praeeklampsie-raetsels-in-vitro-trophoblastzellen-in-aktion\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\u00e9rie de blogs d\u2019\u00e9t\u00e9 en collaboration avec le 3RCC Partie 4: Le myst\u00e8re de la pr\u00e9\u00e9clampsie en passe d\u2019\u00eatre r\u00e9solu: les cellules trophoblastiques in vitro en action!\" \/>\n<meta property=\"og:description\" content=\"La pr\u00e9\u00e9clampsie est une complication grave de la grossesse qui touche 5 \u00e0 8% de toutes les grossesses et c\u2019est l\u2019une des principales causes de mortalit\u00e9 materno-f\u0153tale dans le monde. 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