{"id":7378,"date":"2025-06-19T14:56:42","date_gmt":"2025-06-19T12:56:42","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/le-virus-de-lherpes-remodele-le-genome-humain-pour-son-propre-avantage-mais-une-seule-enzyme-peut-larreter\/"},"modified":"2025-06-19T14:56:44","modified_gmt":"2025-06-19T12:56:44","slug":"le-virus-de-lherpes-remodele-le-genome-humain-pour-son-propre-avantage-mais-une-seule-enzyme-peut-larreter","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/le-virus-de-lherpes-remodele-le-genome-humain-pour-son-propre-avantage-mais-une-seule-enzyme-peut-larreter\/","title":{"rendered":"Le virus de l&rsquo;herp\u00e8s remod\u00e8le le g\u00e9nome humain pour son propre avantage, mais une seule enzyme peut 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\/herpes-virus-plays-int.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2025\/herpes-virus-plays-int.jpg\" data-sub-html=\"Human DNA in its natural state inside cells (left) compared to eight hours after being infected with HSV-1 (right). The virus compacts the human genome's size significantly and moves it towards the edge of the nucleus, freeing up space for the virus to set up a factory for its own purposes. Credit: Esther Gonzalez Almela and \u00c1lvaro Castells Garc\u00eda\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Les virus d\u00e9pendent enti\u00e8rement de leurs h\u00f4tes pour se reproduire. Ils coiffent les cellules vivantes pour les pi\u00e8ces et l&rsquo;\u00e9nergie et d\u00e9tournent les machines cellulaires de l&rsquo;h\u00f4te pour faire de nouvelles copies d&rsquo;eux-m\u00eames. Virus-1 de l&rsquo;herp\u00e8s simplex (HSV-1), il s&rsquo;av\u00e8re que red\u00e9core \u00e9galement, selon une \u00e9tude de <i>Communications de la nature<\/i>.<\/p>\n<p>Les chercheurs du Center for Genomic Regulation (CRG) \u00e0 Barcelone ont d\u00e9couvert que le virus du froid remodeler l&rsquo;architecture du g\u00e9nome humain, r\u00e9organisant sa forme dans un espace tridimensionnel afin que le HSV-1 puisse acc\u00e9der aux g\u00e8nes h\u00f4tes les plus utiles pour sa capacit\u00e9 \u00e0 se reproduire.<\/p>\n<p>\u00ab\u00a0HSV-1 est un designer d&rsquo;int\u00e9rieur opportuniste, remodelant le g\u00e9nome humain avec une grande pr\u00e9cision et choisissant les bits avec lesquels il entre en contact. C&rsquo;est un nouveau m\u00e9canisme de manipulation que nous ne savions pas que le virus devait exploiter les ressources de l&rsquo;h\u00f4te\u00a0\u00bb, explique le Dr Esther Gonz\u00e1lez Almela, premier auteur de l&rsquo;\u00e9tude.<\/p>\n<p>Bien que d&rsquo;autres virus d&rsquo;herp\u00e8s aient \u00e9t\u00e9 vus compacter et remodeler les chromosomes de l&rsquo;h\u00f4te, il n&rsquo;\u00e9tait pas clair s&rsquo;il s&rsquo;agissait d&rsquo;un effet secondaire de l&rsquo;invasion du virus et de la mise en place de ses propres usines de r\u00e9plication virale. L&rsquo;\u00e9tude est la premi\u00e8re preuve que le HSV-1 remod\u00e8le le g\u00e9nome humain d\u00e9lib\u00e9r\u00e9ment et dans les heures suivant l&rsquo;infection.<\/p>\n<p>Surtout, les chercheurs ont constat\u00e9 que le blocage d&rsquo;une seule enzyme de l&rsquo;h\u00f4te, la topoisom\u00e9rase I, a compl\u00e8tement bloqu\u00e9 la capacit\u00e9 du HSV-1 \u00e0 r\u00e9organiser le g\u00e9nome humain pendant l&rsquo;infection, ce qui a arr\u00eat\u00e9 la prise de contr\u00f4le hostile. La d\u00e9couverte repr\u00e9sente une nouvelle strat\u00e9gie potentielle pour contr\u00f4ler un virus qui infecte pr\u00e8s de quatre milliards de personnes dans le monde.<\/p>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/herpes-virus-plays-int-1.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2025\/herpes-virus-plays-int-1.jpg\" data-sub-html=\"Human genome in its natural state before HSV-1 infection. Credit: Esther Gonzalez Almela and \u00c1lvaro Castells Garc\u00eda\">\n<figure class=\"article-img text-center\">\n            <img decoding=\"async\" src=\"https:\/\/rvh-synergie.org\/actualites\/wp-content\/uploads\/2025\/06\/1750337802_359_Le-virus-de-lherpes-remodele-le-genome-humain-pour-son.jpg\" alt=\"Le virus de l'herp\u00e8s joue du designer d'int\u00e9rieur avec l'ADN humain\" title=\"G\u00e9nome humain dans son \u00e9tat naturel avant l'infection du HSV-1. Cr\u00e9dit: Esther Gonzalez Almela et \u00c1lvaro Castells Garc\u00eda\"><br \/>\n                     <\/figure>\n<\/p><\/div>\n<\/div>\n<p>\u00ab\u00a0Dans la culture cellulaire, l&rsquo;inhibition de cette enzyme a arr\u00eat\u00e9 l&rsquo;infection avant que le virus ne puisse faire une seule nouvelle particule\u00a0\u00bb, explique le professeur de recherche ICREA, Pia Cosma, auteur correspondant de l&rsquo;\u00e9tude au Center for Genomic Regulation (CRG) \u00e0 Barcelone. \u00ab\u00a0Cela nous donne une nouvelle cible th\u00e9rapeutique potentielle pour arr\u00eater l&rsquo;infection.\u00a0\u00bb<\/p>\n<p>Les chercheurs ont fait leurs r\u00e9sultats en combinant la microscopie en super-r\u00e9solution, une technique d&rsquo;imagerie qui peut voir des structures de 20 nanom\u00e8tres de large, environ 3 500 fois plus minces qu&rsquo;une m\u00e8che de cheveux, avec Hi-C, une technique qui r\u00e9v\u00e8le quels bits d&rsquo;ADN touchent \u00e0 l&rsquo;int\u00e9rieur du noyau. Ils ont utilis\u00e9 les deux techniques pour acqu\u00e9rir de nouvelles informations m\u00e9canistes sur la fa\u00e7on dont HSV-1 d\u00e9tourne les cellules humaines.<\/p>\n<p>Ils ont trouv\u00e9 que la prise de contr\u00f4le hostile commence dans la premi\u00e8re heure, le virus d\u00e9tournant l&rsquo;enzyme de l&rsquo;ARN-polym\u00e9rase II humain pour aider \u00e0 synth\u00e9tiser ses propres prot\u00e9ines. La topoisom\u00e9rase I, une enzyme qui coupe l&rsquo;ADN pour lib\u00e9rer le stress torsional, et la coh\u00e9sine, une prot\u00e9ine structurelle, a suivi l&rsquo;ARN-polym\u00e9rase humaine II dans les compartiments de r\u00e9plication virale nouvellement formant.<\/p>\n<p>Trois heures apr\u00e8s l&rsquo;infection, la plupart des polym\u00e9rases et une fraction consid\u00e9rable des deux autres facteurs avaient abandonn\u00e9 les g\u00e8nes humains. Le vol en gros provoque une effondrement de la transcription \u00e0 travers le g\u00e9nome de l&rsquo;h\u00f4te, ce qui a provoqu\u00e9 la chromatine, l&rsquo;\u00e9tat naturel du g\u00e9nome humain \u00e0 l&rsquo;int\u00e9rieur des cellules, est \u00e9cras\u00e9 en une coquille dense \u00e0 seulement 30% de son volume d&rsquo;origine.<\/p>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/herpes-virus-plays-int-2.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2025\/herpes-virus-plays-int-2.jpg\" data-sub-html=\"The human genome compacted eight hours after being infected with HSV-1. Credit: Esther Gonzalez Almela and \u00c1lvaro Castells Garc\u00eda\">\n<figure class=\"article-img text-center\">\n            <img decoding=\"async\" src=\"https:\/\/rvh-synergie.org\/actualites\/wp-content\/uploads\/2025\/06\/1750337802_760_Le-virus-de-lherpes-remodele-le-genome-humain-pour-son.jpg\" alt=\"Le virus de l'herp\u00e8s joue du designer d'int\u00e9rieur avec l'ADN humain\" title=\"Le g\u00e9nome humain a compact\u00e9 huit heures apr\u00e8s avoir \u00e9t\u00e9 infect\u00e9 par le HSV-1. Cr\u00e9dit: Esther Gonzalez Almela et \u00c1lvaro Castells Garc\u00eda\"><br \/>\n                     <\/figure>\n<\/p><\/div>\n<\/div>\n<p>Il s&rsquo;agissait d&rsquo;une d\u00e9couverte inattendue, car la structure de la chromatine dicte la transcription. \u00ab\u00a0Nous avons toujours pens\u00e9 que la chromatine dense a ferm\u00e9 les g\u00e8nes, mais nous voyons ici le contraire: arr\u00eater la transcription en premier et les compacts de l&rsquo;ADN par la suite. La relation entre l&rsquo;activit\u00e9 et la structure pourrait \u00eatre une rue \u00e0 double sens\u00a0\u00bb, explique le Dr \u00c1lvaro Castells Garc\u00eda, co-prioritaire de l&rsquo;\u00e9tude.<\/p>\n<p>Deux personnes sur trois de moins de 50 ans vivent avec HSV-1. Une fois infect\u00e9s, les gens ont le virus \u00e0 vie, bien que la plupart des cas soient asymptomatiques ou se manifestent comme des boutons de froid r\u00e9currents. Rarement, le virus peut provoquer la c\u00e9cit\u00e9 ou la maladie potentiellement mortelle chez les nouveau-n\u00e9s et les personnes immunod\u00e9prim\u00e9es.<\/p>\n<p>Les r\u00e9sultats de l&rsquo;\u00e9tude peuvent aider \u00e0 rem\u00e9dier au fardeau de la sant\u00e9 publique du HSV-1, qui est consid\u00e9r\u00e9 comme un d\u00e9fi de sant\u00e9 mondial en raison de sa pr\u00e9valence et de sa capacit\u00e9 \u00e0 provoquer des \u00e9pid\u00e9mies r\u00e9currentes. Bien que des traitements soient disponibles pour g\u00e9rer les sympt\u00f4mes, les souches r\u00e9sistantes aux m\u00e9dicaments sont en augmentation et il n&rsquo;y a pas de rem\u00e8de.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les virus d\u00e9pendent enti\u00e8rement de leurs h\u00f4tes pour se reproduire. Ils coiffent les cellules vivantes<\/p>\n","protected":false},"author":1,"featured_media":7379,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[5538,5728,5727,1175,5729,1625,638,669,8,458,5726,3329,343,47,630],"class_list":["post-7378","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-avantage","tag-enzyme","tag-genome","tag-humain","tag-larreter","tag-lherpes","tag-mais","tag-peut","tag-pour","tag-propre","tag-remodele","tag-seule","tag-son","tag-une","tag-virus","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 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Le virus de l&#039;herp\u00e8s remod\u00e8le le g\u00e9nome humain pour son propre avantage, mais une seule enzyme peut l&#039;arr\u00eater - RVH-Synergie.org<\/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:\/\/rvh-synergie.org\/actualites\/le-virus-de-lherpes-remodele-le-genome-humain-pour-son-propre-avantage-mais-une-seule-enzyme-peut-larreter\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le virus de l&#039;herp\u00e8s remod\u00e8le le g\u00e9nome humain pour son propre avantage, mais une seule enzyme peut l&#039;arr\u00eater - RVH-Synergie.org\" \/>\n<meta property=\"og:description\" content=\"Les virus d\u00e9pendent enti\u00e8rement de leurs h\u00f4tes pour se reproduire. 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