{"id":9913,"date":"2021-07-21T08:55:19","date_gmt":"2021-07-21T06:55:19","guid":{"rendered":"https:\/\/ggba.swiss\/test-serologique-evaluer-limmunite-contre-sars-cov-2\/"},"modified":"2023-07-04T13:43:40","modified_gmt":"2023-07-04T11:43:40","slug":"test-serologique-evaluer-limmunite-contre-sars-cov-2","status":"publish","type":"post","link":"https:\/\/ggba.swiss\/fr\/test-serologique-evaluer-limmunite-contre-sars-cov-2\/","title":{"rendered":"Un test s\u00e9rologique pour \u00e9valuer l\u2019immunit\u00e9 contre le SARS-CoV-2"},"content":{"rendered":"<p>Les tests s\u00e9rologiques permettent de d\u00e9tecter dans le sang d\u2019une personne la pr\u00e9sence d\u2019anticorps contre un agent infectieux comme le SARS-CoV-2. Certains de ces anticorps sont simplement la marque d\u2019une exposition pr\u00e9alable au virus ou au vaccin, alors que d\u2019autres, dits neutralisants, sont les agents d\u2019une immunit\u00e9 protectrice contre l\u2019infection ou la r\u00e9infection.<\/p>\n<p>Dans le cas du SARS-CoV-2, les anticorps neutralisants sont dirig\u00e9s contre la prot\u00e9ine virale Spike, la cl\u00e9 qui permet au virus d\u2019entrer dans la cellule via sa liaison \u00e0 un r\u00e9cepteur (ACE2) pr\u00e9sent \u00e0 la surface des cellules du syst\u00e8me respiratoire.<\/p>\n<p>Des chercheurs du <a href=\"https:\/\/www.chuv.ch\/fr\/chuv-home\" target=\"_blank\" rel=\"noopener\">CHUV<\/a> et de l\u2019<a href=\"https:\/\/www.epfl.ch\/fr\/\" target=\"_blank\" rel=\"noopener\">EPFL<\/a> ont d\u00e9velopp\u00e9 un nouveau test s\u00e9rologique capable de mesurer avec grande pr\u00e9cision et sensibilit\u00e9 la capacit\u00e9 d\u2019un s\u00e9rum de bloquer l\u2019interaction entre une forme trim\u00e9rique de la prot\u00e9ine Spike, telle qu\u2019on la trouve \u00e0 la surface du virus, et la mol\u00e9cule ACE2.\u00a0<\/p>\n<p>Les chercheurs ont d\u00e9montr\u00e9 que ce test est facile \u00e0 utiliser \u00e0 grande \u00e9chelle puisqu\u2019une simple prise de sang suffit. Ce test permet \u00e9galement de mesurer l\u2019efficacit\u00e9 de la protection contre les diff\u00e9rents variants du virus et de suivre leur persistance au cours du temps.<\/p>\n<h4>Des perspectives r\u00e9jouissantes pour le suivi de l\u2019immunit\u00e9 collective<\/h4>\n<p>Le d\u00e9veloppement rapide du nouveau test a \u00e9t\u00e9 rendu possible gr\u00e2ce \u00e0 l\u2019utilisation des plateaux technologiques d\u00e9velopp\u00e9s et soutenus depuis de nombreuses ann\u00e9es par le <a href=\"https:\/\/swissvaccineresearchinstitute.ch\/\" target=\"_blank\" rel=\"noopener\">Swiss Vaccine Research Institute<\/a>.<\/p>\n<p>Les r\u00e9sultats de ces recherches, publi\u00e9s dans la prestigieuse revue scientifique <a href=\"https:\/\/stm.sciencemag.org\/content\/early\/2021\/07\/12\/scitranslmed.abi8452\/tab-article-info\" target=\"_blank\" rel=\"noopener\">Science Translational Medicine<\/a>, offrent des perspectives r\u00e9jouissantes pour le suivi de l\u2019immunit\u00e9 protectrice conf\u00e9r\u00e9e par l\u2019infection et\/ou les vaccins au sein de la population.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le CHUV et l\u2019EPFL ont uni leurs forces pour mettre au point un nouveau test s\u00e9rologique particuli\u00e8rement sensible pour quantifier les anticorps neutralisants contre le SARS-CoV-2.<\/p>\n","protected":false},"author":3,"featured_media":9914,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"mc4wp_mailchimp_campaign":[],"footnotes":""},"categories":[843],"tags":[1027,1068,1072],"class_list":["post-9913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciences-de-la-vie","tag-covid-19-fr","tag-personalized-medicine-fr","tag-rd-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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