{"id":4150,"date":"2024-12-18T06:31:21","date_gmt":"2024-12-18T05:31:21","guid":{"rendered":"https:\/\/stopalzheimer.be\/?p=4150"},"modified":"2024-12-18T13:57:11","modified_gmt":"2024-12-18T12:57:11","slug":"recherche-alzheimer-decouverte-122024","status":"publish","type":"post","link":"https:\/\/stopalzheimer.be\/nl\/recherche-alzheimer-decouverte-122024\/","title":{"rendered":"Des chercheurs belges r\u00e9v\u00e8lent le double r\u00f4le des microglies dans la maladie d&#8217;Alzheimer"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Des chercheurs belges r\u00e9v\u00e8lent le double r\u00f4le des microglies dans la maladie d&#8217;Alzheimer<\/h2>\n\n\n\n<p>La maladie d\u2019Alzheimer, une pathologie neurod\u00e9g\u00e9n\u00e9rative qui prive des millions de personnes de leur m\u00e9moire et de leurs capacit\u00e9s cognitives, reste un d\u00e9fi majeur pour la science. Depuis longtemps, les chercheurs savent que les cellules immunitaires du cerveau, appel\u00e9es microglies, jouent un r\u00f4le central dans la progression de la maladie. Mais leur contribution exacte, parfois contradictoire, \u00e9tait jusqu\u2019ici mal comprise.<\/p>\n\n\n\n<p>Une \u00e9quipe du laboratoire Bart De Strooper, au <a href=\"https:\/\/cbd.sites.vib.be\/en\">VIB-KU Leuven Centre for Brain Research<\/a>, vient d\u2019\u00e9claircir ce myst\u00e8re. Dans <strong><em>une \u00e9tude financ\u00e9e par notre Fondation<\/em><\/strong> et <a href=\"https:\/\/www.nature.com\/articles\/s41467-024-54779-w\">publi\u00e9e dans Nature Communications<\/a>, les chercheurs montrent que les microglies ont une double fonction dans la maladie\u202f: elles peuvent \u00eatre \u00e0 la fois nuisibles et protectrices, selon le stade de la pathologie.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-1024x768.jpg\" alt=\"\" class=\"wp-image-4151\" style=\"width:421px;height:auto\" srcset=\"https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-1024x768.jpg 1024w, https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-300x225.jpg 300w, https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-768x576.jpg 768w, https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-1536x1152.jpg 1536w, https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-2048x1536.jpg 2048w, https:\/\/stopalzheimer.be\/wp-content\/uploads\/2024\/12\/20221215_152449-16x12.jpg 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Un r\u00f4le changeant au fil des stades de la maladie<\/strong><\/p>\n\n\n\n<p>Dans la maladie d\u2019Alzheimer, des plaques amylo\u00efdes, des amas toxiques de prot\u00e9ines, s\u2019accumulent dans le cerveau. Les microglies, charg\u00e9es de nettoyer les d\u00e9chets cellulaires, interagissent avec ces plaques, mais leur r\u00f4le pr\u00e9cis restait flou.<\/p>\n\n\n\n<p>N\u00f3ra Balig\u00e1cs, premi\u00e8re autrice de l\u2019\u00e9tude, explique : \u00ab<em> Les recherches pr\u00e9c\u00e9dentes donnaient des r\u00e9sultats contradictoires. Certaines montraient que les microglies aident \u00e0 \u00e9liminer les plaques amylo\u00efdes, tandis que d\u2019autres sugg\u00e9raient qu\u2019elles contribuent \u00e0 leur formation. Nous avons test\u00e9 l\u2019hypoth\u00e8se selon laquelle leur fonction d\u00e9pend du stade de la maladie.<\/em> \u00bb<\/p>\n\n\n\n<p>L\u2019\u00e9quipe a d\u00e9couvert que, dans les premiers stades de la maladie, les microglies favorisent la formation des plaques amylo\u00efdes, jouant ainsi un r\u00f4le d\u00e9l\u00e9t\u00e8re. Mais \u00e0 un stade avanc\u00e9, ces m\u00eames cellules se r\u00e9activent pour compacter les plaques, limitant ainsi leurs effets toxiques et prot\u00e9geant les neurones.<\/p>\n\n\n\n<p><strong>Des implications pour de nouvelles th\u00e9rapies<\/strong><\/p>\n\n\n\n<p>Pour mieux comprendre cette double fonction, les chercheurs ont \u00e9tudi\u00e9 l\u2019activation des microglies au cours de la maladie. Ils ont constat\u00e9 que les microglies sont initialement dans un \u00e9tat \u00ab\u202fhomeostatique\u202f\u00bb, c\u2019est-\u00e0-dire peu actives, ce qui favorise la formation des plaques. \u00c0 mesure que la maladie progresse, elles deviennent activ\u00e9es et adoptent un r\u00f4le protecteur.<\/p>\n\n\n\n<p>Professeur Bart De Strooper, directeur de l\u2019\u00e9tude, conclut : \u00ab <em>Nos travaux montrent que les microglies homeostatiques, pr\u00e9sentes au d\u00e9but de la maladie, jouent un r\u00f4le nocif, tandis que les microglies activ\u00e9es, plus tardives, ont un effet protecteur. Ces r\u00e9sultats clarifient des donn\u00e9es jusqu\u2019ici contradictoires et ouvrent des pistes pour de nouvelles approches th\u00e9rapeutiques. Mais ils posent aussi une question fondamentale\u202f: faut-il activer ou inhiber les microglies, et \u00e0 quel moment\u202f? <\/em>\u00bb<\/p>\n\n\n\n<p><strong>Vers une compr\u00e9hension accrue gr\u00e2ce au soutien de la recherche<\/strong><\/p>\n\n\n\n<p>Cette avanc\u00e9e, rendue possible par le soutien de nos donateurs, d\u00e9montre l\u2019impact essentiel des financements d\u00e9di\u00e9s \u00e0 la recherche. Ces travaux ouvrent de nouvelles perspectives pour mieux comprendre la maladie d\u2019Alzheimer et orienter le d\u00e9veloppement de th\u00e9rapies adapt\u00e9es, au b\u00e9n\u00e9fice des patients et de leurs familles.<\/p>\n\n\n\n<p><strong>Publication scientifique<\/strong><br><a href=\"https:\/\/www.nature.com\/articles\/s41467-024-54779-w\">Homeostatic microglia initially seed and activated microglia later reshape amyloid plaques in alzheimer\u2019s disease. <\/a>Balig\u00e1cs, et al. Nature communications, 2024. DOI: 10.1038\/s41467-024-54779-w.<\/p>\n\n\n\n<p><strong><em>La presse en parle : <\/em><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DH :<\/strong> https:\/\/www.dhnet.be\/dernieres-depeches\/2024\/12\/18\/des-chercheurs-belges-revelent-le-role-des-microglies-dans-la-maladie-dalzheimer-7YC5XNSSEJAVLCFD2NMXV34AGM\/<\/li>\n\n\n\n<li><strong>Le soir :<\/strong> https:\/\/www.lesoir.be\/643262\/article\/2024-12-18\/des-chercheurs-belges-realisent-une-avancee-majeure-dans-la-comprehension-de-la<\/li>\n\n\n\n<li><strong>RTL :<\/strong> https:\/\/www.rtl.be\/actu\/belgique\/societe\/maladie-dalzheimer-des-chercheurs-belges-font-une-avancee-majeure-ces-resultats\/2024-12-18\/article\/732460<\/li>\n\n\n\n<li><strong>La Libre : <\/strong>https:\/\/www.lalibre.be\/dernieres-depeches\/2024\/12\/18\/des-chercheurs-belges-revelent-le-role-des-microglies-dans-la-maladie-dalzheimer-7YC5XNSSEJAVLCFD2NMXV34AGM\/<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs belges r\u00e9v\u00e8lent le double r\u00f4le des microglies dans la maladie d&#8217;Alzheimer La maladie d\u2019Alzheimer, une pathologie neurod\u00e9g\u00e9n\u00e9rative qui prive des millions de personnes de leur m\u00e9moire et de leurs capacit\u00e9s cognitives, reste un d\u00e9fi majeur pour la science. Depuis longtemps, les chercheurs savent que les cellules immunitaires du cerveau, appel\u00e9es microglies, jouent un [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":4151,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[29],"tags":[],"locatie":[27,26,28,41],"class_list":["post-4150","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-onderzoek","locatie-help-mee","locatie-homepage","locatie-over-alzheimer","locatie-pers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Des chercheurs belges r\u00e9v\u00e8lent le double r\u00f4le des microglies dans la maladie d&#039;Alzheimer - Stop Alzheimer<\/title>\n<meta name=\"description\" content=\"Dans une \u00e9tude financ\u00e9e par Stop Alzheimer, les chercheurs montrent que les microglies ont une double fonction dans la maladie\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stopalzheimer.be\/nl\/recherche-alzheimer-decouverte-122024\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des chercheurs belges r\u00e9v\u00e8lent le double r\u00f4le des microglies dans la maladie d&#039;Alzheimer - 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