{"id":386348,"date":"2025-10-27T11:22:32","date_gmt":"2025-10-27T10:22:32","guid":{"rendered":"https:\/\/www.webdo.tn\/fr\/?p=386348"},"modified":"2025-10-27T11:22:40","modified_gmt":"2025-10-27T10:22:40","slug":"un-vaccin-contre-la-covid-pourrait-aider-a-combattre-le-cancer-une-piste-medicale-revolutionnaire","status":"publish","type":"post","link":"https:\/\/www.webdo.tn\/fr\/actualite\/tech\/un-vaccin-contre-la-covid-pourrait-aider-a-combattre-le-cancer-une-piste-medicale-revolutionnaire\/386348\/","title":{"rendered":"Un vaccin contre la COVID pourrait aider \u00e0 combattre le cancer : une piste m\u00e9dicale r\u00e9volutionnaire"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Des chercheurs am\u00e9ricains ont observ\u00e9 un ph\u00e9nom\u00e8ne surprenant : les vaccins \u00e0 ARNm utilis\u00e9s contre la COVID-19 pourraient stimuler le syst\u00e8me immunitaire de fa\u00e7on \u00e0 aider l\u2019organisme \u00e0 attaquer certaines tumeurs canc\u00e9reuses. Les r\u00e9sultats, encore pr\u00e9liminaires, ouvrent une nouvelle voie dans la lutte contre le cancer.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-un-effet-inattendu-observe-apres-la-vaccination\">Un effet inattendu observ\u00e9 apr\u00e8s la vaccination<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019\u00e9tude, <a href=\"https:\/\/www.nature.com\/articles\/s41551-025-01380-1\" target=\"_blank\" rel=\"noreferrer noopener\">publi\u00e9e dans la revue Nature Biomedical Engineering<\/a> (groupe Nature), a \u00e9t\u00e9 men\u00e9e conjointement par des chercheurs de l\u2019Universit\u00e9 de Floride (College of Medicine, Gainesville) et du MD Anderson Cancer Center de l\u2019Universit\u00e9 du Texas \u00e0 Houston, deux institutions de r\u00e9f\u00e9rence mondiale dans la recherche sur le cancer.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u00ab Ces vaccins produisent de puissantes r\u00e9ponses immunitaires anti-tumorales associ\u00e9es \u00e0 des am\u00e9liorations massives de la survie \u00bb, explique le chercheur Brian Grippin, co-auteur de l\u2019\u00e9tude.<\/p>\n<\/blockquote>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Les chercheurs ont \u00e9galement test\u00e9 le principe sur des souris atteintes de tumeurs. En injectant le vaccin directement dans la tumeur, ils ont observ\u00e9 une r\u00e9action immunitaire accrue : les cellules dendritiques, charg\u00e9es de d\u00e9tecter les anomalies, sont devenues plus actives et ont appel\u00e9 les cellules T \u00e0 la rescousse pour attaquer les cellules canc\u00e9reuses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-comment-cela-fonctionne-t-il\">Comment cela fonctionne-t-il ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les vaccins \u00e0 ARNm (comme ceux de Pfizer-BioNTech ou Moderna) entra\u00eenent le corps \u00e0 reconna\u00eetre une prot\u00e9ine du virus \u2014 ici, la prot\u00e9ine \u00ab spike \u00bb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mais ce m\u00e9canisme pourrait aussi <strong>rendre le syst\u00e8me immunitaire plus vigilant face aux cellules anormales<\/strong>, comme les tumeurs.<br>Autrement dit, le vaccin ne cr\u00e9e pas de nouvelles cellules tueuses, mais <strong>r\u00e9veille les d\u00e9fenses existantes<\/strong> et les oriente mieux.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-de-l-espoir-mais-pas-encore-de-traitement-miracle\">De l\u2019espoir, mais pas encore de traitement miracle<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les chercheurs restent prudents :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Il ne s\u2019agit pas d\u2019un vaccin contre le cancer, mais d\u2019un effet secondaire b\u00e9n\u00e9fique observ\u00e9 dans certains cas.<\/li>\n\n\n\n<li>Tous les patients ne r\u00e9agissent pas de la m\u00eame mani\u00e8re.<\/li>\n\n\n\n<li>Les essais cliniques de phase III vont commencer pour confirmer les r\u00e9sultats avant toute application m\u00e9dicale.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u00ab Ce n\u2019est qu\u2019un d\u00e9but, mais les implications sont extraordinaires : cela pourrait r\u00e9volutionner tout le champ de la canc\u00e9rologie \u00bb, estime le Dr Elias Sayour, qui pr\u00e9pare un essai clinique \u00e9largi.<\/p>\n<\/blockquote>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-un-tournant-possible-pour-la-medecine\">Un tournant possible pour la m\u00e9decine<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Si les r\u00e9sultats se confirment, ce type de vaccin pourrait devenir un adjuvant \u2014 un renfort de l\u2019immunoth\u00e9rapie \u2014 et peut-\u00eatre, \u00e0 terme, un vaccin \u201cuniversel\u201d contre le cancer, capable de relancer les d\u00e9fenses immunitaires de tous les patients, sans traitement personnalis\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour l\u2019instant, cette d\u00e9couverte repr\u00e9sente surtout un formidable espoir scientifique : celui de transformer une arme d\u00e9velopp\u00e9e contre un virus mondial en outil th\u00e9rapeutique contre l\u2019une des plus grandes causes de mortalit\u00e9 au monde.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Lire aussi:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.webdo.tn\/fr\/actualite\/national\/tunisie-nouvelle-technique-contre-le-cancer-abdominal-testee-a-la-rabta\/376379\/\">Tunisie : Nouvelle technique contre le cancer abdominal test\u00e9e \u00e0 la Rabta<\/a><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.webdo.tn\/fr\/actualite\/national\/en-2040-la-tunisie-enregistrera-plus-de-40-mille-cas-de-cancers\/212391\/\">En 2040, la Tunisie enregistrera plus de 40 mille cas de cancers<br><\/a><a href=\"https:\/\/www.webdo.tn\/fr\/actualite\/national\/tunisie-nouvelle-technique-contre-le-cancer-abdominal-testee-a-la-rabta\/376379\/\"><br><\/a><\/li>\n<\/ul>\n<\/blockquote>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs am\u00e9ricains ont observ\u00e9 un ph\u00e9nom\u00e8ne surprenant : les vaccins \u00e0 ARNm utilis\u00e9s contre la COVID-19 pourraient stimuler le syst\u00e8me immunitaire de fa\u00e7on \u00e0 aider l\u2019organisme \u00e0 attaquer certaines tumeurs canc\u00e9reuses. Les r\u00e9sultats, encore pr\u00e9liminaires, ouvrent une nouvelle voie dans la lutte contre le cancer. Un effet inattendu observ\u00e9 apr\u00e8s la vaccination L\u2019\u00e9tude, publi\u00e9e [&hellip;]<\/p>\n","protected":false},"author":4779,"featured_media":386356,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9070],"tags":[6973,5871,3839],"class_list":["post-386348","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","tag-cancer","tag-covid-19","tag-vaccins"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Un vaccin contre la COVID pourrait aider \u00e0 combattre le cancer : une piste m\u00e9dicale r\u00e9volutionnaire - webdo<\/title>\n<meta name=\"description\" content=\"Un vaccin contre la COVID pourrait aider \u00e0 combattre le cancer, selon une \u00e9tude r\u00e9v\u00e9latrice du MD Anderson Cancer Center.\" 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