{"id":8057,"date":"2025-07-20T02:55:54","date_gmt":"2025-07-20T00:55:54","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/le-nouveau-candidat-au-vaccin-covid-19-montre-une-forte-protection-contre-les-variantes-multiples\/"},"modified":"2025-07-20T02:55:56","modified_gmt":"2025-07-20T00:55:56","slug":"le-nouveau-candidat-au-vaccin-covid-19-montre-une-forte-protection-contre-les-variantes-multiples","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/le-nouveau-candidat-au-vaccin-covid-19-montre-une-forte-protection-contre-les-variantes-multiples\/","title":{"rendered":"Le nouveau candidat au vaccin Covid-19 montre une forte protection contre les variantes multiples"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/new-covid-19-vaccine-c.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2025\/new-covid-19-vaccine-c.jpg\" data-sub-html=\"Elizabeth Chan and Claudio Counoupas. Credit: Centenary Institute\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Un nouveau candidat prometteur de vaccin Covid-19 d\u00e9velopp\u00e9 par des chercheurs du Centenary Institute et de l&rsquo;Universit\u00e9 de Sydney a montr\u00e9 un fort potentiel pour se prot\u00e9ger contre les variantes de coronavirus actuelles et \u00e9mergentes. En ciblant les fonctionnalit\u00e9s partag\u00e9es par une gamme de coronavirus, le vaccin est con\u00e7u pour offrir une protection plus large et plus durable \u00e0 mesure que le virus continue d&rsquo;\u00e9voluer.<\/p>\n<p>Le d\u00e9veloppement intervient alors que l&rsquo;Australie fait face \u00e0 la circulation continue de Covid-19 en hiver, avec de nouvelles sous-variations omicrones telles que XBB.1.5 contribuant aux infections et aux hospitalisations. \u00c0 ce jour, plus de 115 000 cas Covid-19 ont \u00e9t\u00e9 signal\u00e9s au syst\u00e8me national de surveillance des maladies notifiables du gouvernement australien pour 2025.<\/p>\n<p>Publi\u00e9 dans la revue <i>vaccins au npj<\/i>la nouvelle \u00e9tude montre que le candidat vaccinal, nomm\u00e9 Covexs5, prot\u00e9geait des souris de plusieurs coronavirus, y compris la variante Omicron XBB.1.5 hautement immunitaire et SARS-CoV-1, un parent de SARS-CoV-2 qui \u00e9tait responsable de la foss\u00e9e SARS 2002-2004.<\/p>\n<p>Dans les tests de laboratoire, Covexs5 a r\u00e9duit les niveaux de virus dans les poumons des souris infect\u00e9es d&rsquo;environ 99,9% par rapport aux t\u00e9moins non vaccin\u00e9s, d\u00e9montrant un effet protecteur dramatique.<\/p>\n<p>Notamment, le candidat du vaccin a d\u00e9clench\u00e9 des niveaux \u00e9lev\u00e9s d&rsquo;anticorps de blocage du virus et a activ\u00e9 des cellules T immunitaires sp\u00e9ciales dans les poumons qui jouent un r\u00f4le cl\u00e9 dans la d\u00e9fense contre les virus respiratoires.<\/p>\n<p>Covexs5 dispose d&rsquo;une version unique de la prot\u00e9ine de pointe, qui fusionne les \u00e9l\u00e9ments prot\u00e9iques de plusieurs coronavirus dans une seule structure. Cette fusion aide le syst\u00e8me immunitaire \u00e0 reconna\u00eetre et \u00e0 r\u00e9agir \u00e0 une gamme plus large de types de virus, pas seulement une souche sp\u00e9cifique.<\/p>\n<p>\u00ab\u00a0En combinant des parties de plusieurs coronavirus, nous avons cr\u00e9\u00e9 un vaccin qui peut mieux pr\u00e9parer l&rsquo;organisme \u00e0 combattre les menaces actuelles et futures\u00a0\u00bb, a d\u00e9clar\u00e9 le Dr Claudio Converse, auteur et chercheur de l&rsquo;\u00e9tude Co-Lead au Centenary Institute du Center for Infection &#038; Immunity.<\/p>\n<p>Auteur de l&rsquo;\u00e9tude co-\u00e9rige, Elizabeth Chan, un doctorat. L&rsquo;\u00e9tudiant du Centenary Institute et de l&rsquo;Universit\u00e9 de Sydney, a d\u00e9clar\u00e9 que les r\u00e9sultats mettent en \u00e9vidence le potentiel d&rsquo;un vaccin Covid-19 de nouvelle g\u00e9n\u00e9ration qui pourrait fonctionner dans diff\u00e9rentes variantes.<\/p>\n<p>\u00ab\u00a0La r\u00e9ponse immunitaire que nous avons vue en laboratoire \u00e9tait \u00e0 la fois forte et large. Il est excitant de penser que cette approche pourrait aider les vaccins \u00e0 l&rsquo;\u00e9preuve des futurs contre les changements continus dans le virus\u00a0\u00bb, a-t-elle d\u00e9clar\u00e9.<\/p>\n<p>Le candidat au vaccin comprend \u00e9galement Sepivac SWE, un adjuvant \u00e0 acc\u00e8s libre qui am\u00e9liore la r\u00e9ponse immunitaire et offre des avantages pratiques pour la fabrication des vaccins et la distribution mondiale.<\/p>\n<p>\u00ab\u00a0Sepivac Swe est non seulement efficace, mais parce qu&rsquo;il est \u00e0 acc\u00e8s ouvert, il peut \u00eatre utilis\u00e9 par les fabricants du monde entier sans obstacle \u00e0 l&rsquo;octroi de licences ni en co\u00fbts \u00e9lev\u00e9s\u00a0\u00bb, a d\u00e9clar\u00e9 l&rsquo;auteur de l&rsquo;\u00e9tude principale, le professeur Jamie Triccas, directeur adjoint du Sydney Infectious Diseases Institute de l&rsquo;Universit\u00e9 de Sydney.<\/p>\n<p>\u00ab\u00a0C&rsquo;est un \u00e9norme avantage pour l&rsquo;\u00e9quit\u00e9 mondiale des vaccins, en particulier dans les pays \u00e0 faible revenu et \u00e0 revenu interm\u00e9diaire o\u00f9 l&rsquo;acc\u00e8s et le co\u00fbt sont des pr\u00e9occupations critiques.\u00a0\u00bb<\/p>\n<p>L&rsquo;\u00e9quipe de recherche se concentre d\u00e9sormais sur la progression du candidat vaccinal gr\u00e2ce \u00e0 un d\u00e9veloppement et \u00e0 des tests suppl\u00e9mentaires.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Un nouveau candidat prometteur de vaccin Covid-19 d\u00e9velopp\u00e9 par des chercheurs du Centenary Institute et<\/p>\n","protected":false},"author":1,"featured_media":8058,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[5147,90,561,1067,49,210,4238,495,1116,47,323,2367],"class_list":["post-8057","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-candidat","tag-contre","tag-covid19","tag-forte","tag-les","tag-montre","tag-multiples","tag-nouveau","tag-protection","tag-une","tag-vaccin","tag-variantes","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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