{"id":218852,"date":"2021-09-09T23:05:14","date_gmt":"2021-09-09T22:05:14","guid":{"rendered":"https:\/\/www.realites.com.tn\/?p=218852"},"modified":"2021-09-09T23:05:14","modified_gmt":"2021-09-09T22:05:14","slug":"covid-19-vers-un-vaccin-nasal-francais","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/covid-19-vers-un-vaccin-nasal-francais\/","title":{"rendered":"Covid-19 : vers un vaccin nasal fran\u00e7ais ?"},"content":{"rendered":"<div>L\u2019Inrae et l\u2019universit\u00e9 de Tours, en France, ont d\u00e9pos\u00e9 un brevet pour un nouveau genre de candidat vaccin prometteur, par administration nasale.<\/div>\n<div>Le vaccin, qui en est encore \u00e0 sa phase de d\u00e9veloppement, est essentiellement compos\u00e9 de prot\u00e9ines virales, \u00ab encapsul\u00e9es \u00bb dans des nanoparticules \u00e0 base d\u2019amidon et de lipides. Selon l\u2019Inrae et l\u2019universit\u00e9 de Tours, la plus-value de ce vaccin r\u00e9side dans sa capacit\u00e9 \u00e0 couper la transmission entre individus, en agissant directement sur la muqueuse nasale. \u00ab Contrairement aux vaccins intra-musculaires, seuls les vaccins \u00e0 administration par voie nasale seraient capables d\u2019\u00e9viter la pr\u00e9sence de virus dans le nez, stade initial de l\u2019infection. Ils induisent en effet une immunit\u00e9 au niveau des muqueuses nasales, porte d\u2019entr\u00e9e et lieu de multiplication du virus \u00bb, expliquent les chercheurs dans un communiqu\u00e9.<\/div>\n<div><\/div>\n<div><strong>*Un vaccin en \u00ab support \u00bb aux doses d\u00e9j\u00e0 inject\u00e9es ?<\/strong><\/div>\n<div>\u00ab Les exp\u00e9riences ont montr\u00e9 que le vaccin arr\u00eate tr\u00e8s pr\u00e9cocement la transmission. Je travaille sur des animaux qui sont infect\u00e9s : deux jours apr\u00e8s, je constate que la charge virale dans les poumons est explosive. Si je regarde la m\u00eame chose sur les animaux qui ont \u00e9t\u00e9 vaccin\u00e9s et infect\u00e9s, je ne retrouve aucune trace du virus dans les poumons \u00bb, pr\u00e9cise la responsable de l\u2019\u00e9quipe de recherche BioMAP Isabelle Dimier-Poisson.<\/div>\n<div>Ce vaccin sans adjuvant, qui s\u2019appuie sur des chercheurs et industriels bas\u00e9s en France, pourrait aussi servir de rappel dans la population d\u00e9j\u00e0 vaccin\u00e9e \u00ab afin d\u2019\u00e9viter la transmission de la maladie \u00bb. Selon la chercheuse, BioMAP a r\u00e9ussi \u00e0 obtenir \u00ab 100 % de survie \u00bb sur des souris vaccin\u00e9es puis infect\u00e9es par le Covid-19, contre \u00ab 100 % de mortalit\u00e9 \u00bb sur des souris non-vaccin\u00e9es. L\u2019\u00e9quipe de recherche esp\u00e8re commencer d\u00e8s l\u2019automne la phase de production en vue d\u2019une phase clinique lors du deuxi\u00e8me semestre 2022. La mise sur le march\u00e9 est pr\u00e9vue pour 2023.<\/div>\n<div>\u00ab Techniquement, le vaccin sera administrable \u00e0 l\u2019aide d\u2019un petit adaptateur plac\u00e9 au bout d\u2019une seringue sans aiguille, permettant une diffusion au sein de la cavit\u00e9 nasale \u00bb, a pr\u00e9cis\u00e9 l\u2019Inrae. Le travail de l\u2019\u00e9quipe BioMAP de l\u2019Inrae et de l\u2019universit\u00e9 de Tours se fonde sur un vaccin nanoparticulaire mis au point contre la toxoplasmose, avec \u00ab une efficacit\u00e9 \u00e0 100 % sur les primates \u00bb.<\/div>\n<div style=\"text-align: right\">(AFP)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019Inrae et l\u2019universit\u00e9 de Tours, en France, ont d\u00e9pos\u00e9 un brevet pour un nouveau genre de candidat vaccin prometteur, par administration nasale. Le vaccin, qui en est encore \u00e0 sa&hellip;<\/p>\n","protected":false},"author":60,"featured_media":218853,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7],"tags":[],"class_list":["post-218852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monde"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Covid-19 : vers un vaccin nasal fran\u00e7ais ? - R\u00e9alit\u00e9s Magazine<\/title>\n<meta name=\"description\" content=\"L\u2019Inrae et l\u2019universit\u00e9 de Tours, en France, ont d\u00e9pos\u00e9 un brevet pour un nouveau genre de candidat vaccin prometteur, par administration nasale. 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