{"id":8884,"date":"2025-08-26T03:58:13","date_gmt":"2025-08-26T01:58:13","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/comment-le-systeme-immunitaire-du-cerveau-entraine-une-rechute-de-medicament-et-une-nouvelle-facon-potentielle-de-larreter\/"},"modified":"2025-08-26T03:58:16","modified_gmt":"2025-08-26T01:58:16","slug":"comment-le-systeme-immunitaire-du-cerveau-entraine-une-rechute-de-medicament-et-une-nouvelle-facon-potentielle-de-larreter","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/comment-le-systeme-immunitaire-du-cerveau-entraine-une-rechute-de-medicament-et-une-nouvelle-facon-potentielle-de-larreter\/","title":{"rendered":"Comment le syst\u00e8me immunitaire du cerveau entra\u00eene une rechute de m\u00e9dicament et une nouvelle fa\u00e7on potentielle de l&rsquo;arr\u00eater"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/new-research-uncovers-13.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2025\/new-research-uncovers-13.jpg\" data-sub-html=\"Three-dimensional reconstruction of a single microglia, showing astrocyte-derived inclusions (green) within the phagosome (purple) and peripheral processes following cocaine self-administration and withdrawal. Credit: Anze Testen, Reissner Lab\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Une nouvelle \u00e9tude \u00e0 l&rsquo;Universit\u00e9 de Caroline du Nord \u00e0 Chapel Hill a d\u00e9couvert un nouveau m\u00e9canisme surprenant dans le cerveau qui peut expliquer pourquoi les gens qui se remettent d&rsquo;une toxicomanie rechutent souvent.<\/p>\n<p>La consommation r\u00e9p\u00e9t\u00e9e de drogues modifie le cerveau de mani\u00e8re durable. En utilisant un mod\u00e8le de rongeur d&rsquo;utilisation de la coca\u00efne, les chercheurs de l&rsquo;UNC ont constat\u00e9 que pendant l&rsquo;abstinence, les cellules immunitaires du cerveau, appel\u00e9es microglies, commencent \u00e0 \u00e9latir activement des parties d&rsquo;autres cellules de soutien appel\u00e9es astrocytes. Ces dommages ont augment\u00e9 le comportement de recherche de m\u00e9dicaments, mais lorsque les scientifiques ont emp\u00each\u00e9 des microglies d&rsquo;\u00e9liminer les pi\u00e8ces d&rsquo;astrocytes, les comportements de rechute ont \u00e9t\u00e9 r\u00e9duits.<\/p>\n<p>Les r\u00e9sultats sont publi\u00e9s dans la revue <i>Rapports cellulaires<\/i>.<\/p>\n<p>\u00ab\u00a0Nos r\u00e9sultats r\u00e9v\u00e8lent que les cellules immunitaires du cerveau peuvent entra\u00eener la d\u00e9sir de m\u00e9dicament en \u00e9liminant les structures de soutien qui aident \u00e0 maintenir les circuits neuronaux \u00e9quilibr\u00e9s\u00a0\u00bb, a d\u00e9clar\u00e9 Kathryn Reissner, chercheur principal et professeur au D\u00e9partement de psychologie et de neurosciences de l&rsquo;UNC-Chapel Hill. \u00ab\u00a0En prot\u00e9geant ces connexions, nous pouvons \u00eatre en mesure de r\u00e9duire le risque de rechute chez les personnes qui se remettent de la d\u00e9pendance.\u00a0\u00bb<\/p>\n<p>Les astrocytes sont des cellules critiques qui aident \u00e0 r\u00e9guler le syst\u00e8me de r\u00e9compense du cerveau. Des \u00e9tudes ant\u00e9rieures avaient montr\u00e9 que ces cellules r\u00e9tr\u00e9cissent apr\u00e8s la consommation de coca\u00efne, mais la cause \u00e9tait inconnue. Cette \u00e9tude est la premi\u00e8re \u00e0 d\u00e9montrer que le syst\u00e8me immunitaire du cerveau est responsable et que ce processus contribue directement \u00e0 la rechute de risque.<\/p>\n<p>\u00ab\u00a0Les traitements de la toxicomanie se concentrent depuis longtemps sur les neurones, mais ce travail montre que le ciblage du syst\u00e8me immunitaire du cerveau pourrait ouvrir un tout nouveau front dans la lutte contre la d\u00e9pendance et la rechute\u00a0\u00bb, a d\u00e9clar\u00e9 Anze Testen, chercheur co-dirig\u00e9 et ancien \u00e9tudiant dipl\u00f4m\u00e9 \u00e0 UNC-Chapel Hill. \u00ab\u00a0C&rsquo;est une \u00e9tape prometteuse vers les th\u00e9rapies qui pr\u00e9servent la sant\u00e9 du cerveau pendant la r\u00e9cup\u00e9ration.\u00a0\u00bb<\/p>\n<p>L&rsquo;\u00e9quipe affirme que les r\u00e9sultats pourraient aider \u00e0 remodeler la fa\u00e7on dont la d\u00e9pendance est trait\u00e9e \u00e0 l&rsquo;avenir. Au lieu de se concentrer uniquement sur les neurones, les traitements peuvent un jour viser \u00e0 prot\u00e9ger les astrocytes et \u00e0 limiter les r\u00e9ponses immunitaires nocives dans le cerveau.<\/p>\n<p>\u00ab\u00a0Il s&rsquo;agit d&rsquo;un exemple passionnant de la fa\u00e7on dont la science fondamentale peut d\u00e9couvrir des m\u00e9canismes cach\u00e9s de la maladie\u00a0\u00bb, a d\u00e9clar\u00e9 Jonathan Vanryzin, chercheur co-dirig\u00e9 et chercheur postdoctoral \u00e0 UNC-Chapel Hill. \u00ab\u00a0En comprenant comment les microglies et les astrocytes interagissent apr\u00e8s la consommation de drogues, nous sommes plus proches de la conception de strat\u00e9gies cibl\u00e9es pour aider les gens sans drogue.\u00a0\u00bb<\/p>\n<p>Au-del\u00e0 de la consommation de coca\u00efne, l&rsquo;\u00e9tude met en \u00e9vidence un principe plus large: les interactions neuro-immunes peuvent jouer un r\u00f4le cl\u00e9 dans la fa\u00e7on dont le cerveau s&rsquo;adapte apr\u00e8s la consommation de substances. Les chercheurs pr\u00e9voient d&rsquo;explorer si des processus similaires se produisent chez l&rsquo;homme souffrant de troubles de la toxicomanie.<\/p>\n<p>Tania Bellinger, chercheuse co-dirig\u00e9e et \u00e9tudiante dipl\u00f4m\u00e9e \u00e0 UNC-Chapel Hill, a ajout\u00e9 que ce travail ouvrira un nouvel ensemble de cibles mol\u00e9culaires, faisant remarquer: \u00ab\u00a0Les th\u00e9rapies futures pourraient \u00eatre en mesure de bloquer le syst\u00e8me immunitaire du cerveau de l&rsquo;\u00e9lagage des cellules saines, en fin de compte des gens \u00e0 maintenir la r\u00e9cup\u00e9ration.\u00a0\u00bb<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Une nouvelle \u00e9tude \u00e0 l&rsquo;Universit\u00e9 de Caroline du Nord \u00e0 Chapel Hill a d\u00e9couvert un<\/p>\n","protected":false},"author":1,"featured_media":8885,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[585,182,1220,546,834,5729,1046,244,651,4822,843,47],"class_list":["post-8884","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-addictions","tag-cerveau","tag-comment","tag-entraine","tag-facon","tag-immunitaire","tag-larreter","tag-medicament","tag-nouvelle","tag-potentielle","tag-rechute","tag-systeme","tag-une","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - 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