{"id":10663,"date":"2025-10-16T04:06:31","date_gmt":"2025-10-16T02:06:31","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/la-technologie-des-puces-dorganes-humains-ouvre-la-voie-aux-therapies-a-arn-crispr-contre-la-grippe-a\/"},"modified":"2025-10-16T04:06:48","modified_gmt":"2025-10-16T02:06:48","slug":"la-technologie-des-puces-dorganes-humains-ouvre-la-voie-aux-therapies-a-arn-crispr-contre-la-grippe-a","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/la-technologie-des-puces-dorganes-humains-ouvre-la-voie-aux-therapies-a-arn-crispr-contre-la-grippe-a\/","title":{"rendered":"La technologie des puces d\u2019organes humains ouvre la voie aux th\u00e9rapies \u00e0 ARN CRISPR contre la grippe A"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/human-organ-chip-techn.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2025\/human-organ-chip-techn.jpg\" data-sub-html=\"The Wyss team has designed a CRISPR RNA therapy able to broadly fight influenza A virus infection and a preclinical system to test it efficacy and safety in. The system, which utilizes human Organ Chip technology, can be applied to the future development and translation of such therapies and overcomes major limitations with animal models. Credit: Wyss Institute at Harvard University\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Le virus de la grippe A (IAV) a \u00e9t\u00e9 \u00e0 l\u2019origine de six pand\u00e9mies grippales majeures, responsables de 50 \u00e0 100 millions de d\u00e9c\u00e8s dans le monde. Rien qu&rsquo;aux \u00c9tats-Unis, on estime qu&rsquo;en d\u00e9pit des vaccins mis \u00e0 jour selon les saisons, les infections par l&rsquo;IAV entra\u00eenent toujours entre 140 000 et 710 000 hospitalisations et entre 12 000 et 52 000 d\u00e9c\u00e8s par an.<\/p>\n<p>Le d\u00e9veloppement de traitements antiviraux contre l\u2019IAV \u2013 ou d\u2019approches de vaccination plus durables d\u2019ailleurs \u2013 a \u00e9t\u00e9 extr\u00eamement difficile car l\u2019IAV d\u00e9veloppe facilement une r\u00e9sistance contre eux en modifiant sa constitution g\u00e9n\u00e9tique. \u00c0 ce jour, sa capacit\u00e9 \u00e0 \u00ab\u00a0muter\u00a0\u00bb, \u00e0 r\u00e9organiser son information g\u00e9n\u00e9tique ou m\u00eame \u00e0 la recombiner avec celle d\u2019autres virus IAV infectant la m\u00eame cellule a constitu\u00e9 un d\u00e9fi insurmontable pour les d\u00e9veloppeurs de m\u00e9dicaments et pr\u00e9sente un risque constant d\u2019\u00e9mergence de nouvelles souches pand\u00e9miques.<\/p>\n<p>La recherche d&rsquo;une arme efficace contre la constitution g\u00e9n\u00e9tique en constante \u00e9volution de l&rsquo;IAV a \u00e9t\u00e9 entrav\u00e9e par l&rsquo;absence d&rsquo;un mod\u00e8le humain in vitro appropri\u00e9 pour tester de nouveaux traitements. Ce d\u00e9fi est aggrav\u00e9 par le fait que les mod\u00e8les animaux d\u2019infection par l\u2019IAV ne parviennent pas \u00e0 reproduire avec pr\u00e9cision les r\u00e9ponses immunitaires humaines et que l\u2019administration de m\u00e9dicaments dans les tissus pulmonaires humains s\u2019effectue dans des conditions diff\u00e9rentes de celles des animaux.<\/p>\n<p>De nouvelles approches bas\u00e9es sur la technologie d&rsquo;\u00e9dition g\u00e9n\u00e9tique CRISPR sont \u00e0 l&rsquo;\u00e9tude, mais les s\u00e9quences cibl\u00e9es sont si sp\u00e9cifiques \u00e0 l&rsquo;homme que les \u00e9tudes ne peuvent pas \u00eatre men\u00e9es de mani\u00e8re significative sur des mod\u00e8les animaux.<\/p>\n<p>Maintenant, une nouvelle \u00e9tude collaborative du Wyss Institute for Biologically Inspired Engineering de l&rsquo;Universit\u00e9 Harvard a relev\u00e9 ces d\u00e9fis en exploitant simultan\u00e9ment un mod\u00e8le microfluidique de puce d&rsquo;alv\u00e9ole pulmonaire humaine (puce pulmonaire) \u00ab respiratoire \u00bb d&rsquo;infection par IAV d\u00e9velopp\u00e9 dans le groupe du directeur fondateur Donald Ingber, MD, Ph.D.\u00a0; plates-formes d&rsquo;administration de m\u00e9dicaments avanc\u00e9es par la directrice associ\u00e9e Natalie Artzi, Ph.D. et son groupe\u00a0; et la technologie CRISPR de pointe.<\/p>\n<p>L&rsquo;\u00e9quipe y est parvenue en concevant un m\u00e9canisme CRISPR ciblant une s\u00e9quence fortement conserv\u00e9e dans le g\u00e9nome de l&rsquo;IAV, en l&#8217;emballant dans de minuscules nanoparticules ayant une affinit\u00e9 avec les cellules \u00e9pith\u00e9liales pulmonaires et en d\u00e9livrant les particules charg\u00e9es aux cellules \u00e9pith\u00e9liales pulmonaires tapissant un canal microfluidique dans la puce pulmonaire infect\u00e9e par un IAV pand\u00e9mique.<\/p>\n<p>En cons\u00e9quence, la charge virale dans les tissus modifi\u00e9s a \u00e9t\u00e9 r\u00e9duite de plus de 50 % apr\u00e8s une seule administration du traitement, et la r\u00e9ponse inflammatoire de l\u2019h\u00f4te provoqu\u00e9e par le virus a \u00e9t\u00e9 consid\u00e9rablement att\u00e9nu\u00e9e. Il est important de noter que seuls des effets minimes hors cible, r\u00e9v\u00e9l\u00e9s par l\u2019analyse transcriptomique, se sont produits dans le syst\u00e8me. Ainsi, ce mod\u00e8le de puce d&rsquo;organe qui imite mieux l&rsquo;infection humaine par l&rsquo;IAV que d&rsquo;autres mod\u00e8les pr\u00e9cliniques permet d&rsquo;\u00e9valuer l&rsquo;efficacit\u00e9 et la s\u00e9curit\u00e9 des th\u00e9rapies \u00e0 ARN CRISPR d&rsquo;une mani\u00e8re plus pertinente sur le plan clinique que les approches ant\u00e9rieures.<\/p>\n<p>Les r\u00e9sultats sont publi\u00e9s dans <i>Laboratoire sur puce<\/i>.<\/p>\n<p>\u00ab\u00a0Nos r\u00e9sultats d\u00e9montrent que le mod\u00e8le de puce pulmonaire humaine de l&rsquo;infection par l&rsquo;IAV est un banc d&rsquo;essai pr\u00e9clinique tr\u00e8s pr\u00e9cieux pour les th\u00e9rapies \u00e0 base d&rsquo;ARN CRISPR qui agissent largement sur les souches virales, car il rend non seulement compte de leur efficacit\u00e9 d&rsquo;une mani\u00e8re pertinente pour l&rsquo;homme, mais, surtout, permet \u00e9galement d&rsquo;\u00e9valuer leurs effets potentiels hors cible, que nous trouvons jusqu&rsquo;\u00e0 pr\u00e9sent minimes\u00a0\u00bb, a d\u00e9clar\u00e9 Ingber.<\/p>\n<p>\u00ab\u00a0\u00c9tant donn\u00e9 la forte probabilit\u00e9 de futures pand\u00e9mies et la variation saisonni\u00e8re naturelle de l&rsquo;IAV, de tels traitements antiviraux pan-IAV pourraient nous aider \u00e0 devancer le virus et, potentiellement, \u00e0 sauver des milliers de vies.\u00a0\u00bb<\/p>\n<p>Ingber est \u00e9galement professeur Judah Folkman de biologie vasculaire \u00e0 la Harvard Medical School et au Boston Children&rsquo;s Hospital, et professeur Hansj\u00f6rg Wyss d&rsquo;ing\u00e9nierie d&rsquo;inspiration biologique \u00e0 SEAS.<\/p>\n<p>Parmi les autres auteurs de l&rsquo;\u00e9tude figuraient Ryan Posey, Haiquing Bai, Amanda Jiang, Pere Dosta, Diana Ocampo-Alvarado, Robert Plebani, Jie Ji et Chaitra Belgur.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Le virus de la grippe A (IAV) a \u00e9t\u00e9 \u00e0 l\u2019origine de six pand\u00e9mies grippales<\/p>\n","protected":false},"author":1,"featured_media":10664,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[5029,171,90,4053,16,4248,419,1398,3216,6024,2077,2622,188],"class_list":["post-10663","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-arn","tag-aux","tag-contre","tag-crispr","tag-des","tag-dorganes","tag-grippe","tag-humains","tag-ouvre","tag-puces","tag-technologie","tag-therapies","tag-voie","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - 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