{"id":69260,"date":"2023-12-07T19:22:10","date_gmt":"2023-12-07T19:22:10","guid":{"rendered":"https:\/\/www.pharmacie-vezere.com\/promotions\/?p=69260"},"modified":"2023-12-07T19:22:13","modified_gmt":"2023-12-07T19:22:13","slug":"demeler-lenigme-nouvelle-proteine-liee-a-la-demence-precoce","status":"publish","type":"post","link":"https:\/\/www.pharmacie-vezere.com\/promotions\/demeler-lenigme-nouvelle-proteine-liee-a-la-demence-precoce\/","title":{"rendered":"D\u00e9m\u00ealer l’\u00c9nigme : Nouvelle Prot\u00e9ine Li\u00e9e \u00e0 la D\u00e9mence Pr\u00e9coce"},"content":{"rendered":"\n

Date : 6 d\u00e9cembre 2023<\/em><\/p>\n\n\n\n

Dans une r\u00e9v\u00e9lation r\u00e9volutionnaire, des scientifiques ont d\u00e9couvert une prot\u00e9ine jusqu’alors inconnue associ\u00e9e \u00e0 la d\u00e9mence pr\u00e9coce, une forme de trouble neurod\u00e9g\u00e9n\u00e9ratif connue sous le nom de d\u00e9mence frontotemporale (DFT). Cette d\u00e9couverte promet un changement d\u00e9cisif dans notre compr\u00e9hension de la base mol\u00e9culaire de la DFT, offrant l’espoir d’avanc\u00e9es diagnostiques futures et de traitements cibl\u00e9s.<\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Traditionnellement, les maladies neurod\u00e9g\u00e9n\u00e9ratives, en particulier les d\u00e9mences, sont caract\u00e9ris\u00e9es par des agr\u00e9gats anormaux de prot\u00e9ines, commun\u00e9ment appel\u00e9s amylo\u00efdes. Ces agr\u00e9gats, qui jouent un r\u00f4le crucial dans des maladies telles que Alzheimer, \u00e9taient, jusqu’\u00e0 r\u00e9cemment, insaisissables dans environ 10 % des cas de d\u00e9mence frontotemporale, laissant les scientifiques perplexes.<\/p>\n\n\n\n

La prot\u00e9ine nouvellement identifi\u00e9e, TAF15, a \u00e9t\u00e9 trouv\u00e9e dans des structures agr\u00e9g\u00e9es au sein des cerveaux de personnes atteintes de DFT. La d\u00e9mence frontotemporale r\u00e9sulte de la d\u00e9g\u00e9n\u00e9rescence des lobes frontal et temporal, impactant les \u00e9motions, la personnalit\u00e9, le comportement, la parole et la compr\u00e9hension des mots. Contrairement \u00e0 Alzheimer, la DFT a tendance \u00e0 se manifester chez des personnes \u00e2g\u00e9es de 45 \u00e0 65 ans, bien qu’elle puisse toucher des individus plus jeunes ou plus \u00e2g\u00e9s.<\/p>\n\n\n\n

La recherche, dirig\u00e9e par des scientifiques du Medical Research Council (MRC) Laboratory of Molecular Biology \u00e0 Cambridge, au Royaume-Uni, ouvre des voies pour d\u00e9velopper des outils de diagnostic et des traitements ciblant TAF15. Le Dr Benjamin Ryskeldi-Falcon, chercheur principal de l’\u00e9tude, a soulign\u00e9 la nature transformative de cette d\u00e9couverte, d\u00e9clarant : “Cette d\u00e9couverte transforme notre compr\u00e9hension de la base mol\u00e9culaire de la d\u00e9mence frontotemporale.”<\/p>\n\n\n\n

L’\u00e9tude a utilis\u00e9 une cryo-microscopie \u00e9lectronique de pointe (cryo-ME) pour examiner les agr\u00e9gats de prot\u00e9ines dans les cerveaux de quatre personnes atteintes de cette forme de d\u00e9mence frontotemporale \u00e0 une r\u00e9solution atomique.<\/p>\n\n\n\n

Implications pour les Perspectives et Interventions Futures<\/strong><\/h2>\n\n\n\n

L’identification de TAF15 comme acteur cl\u00e9 dans la DFT a des implications importantes tant pour le diagnostic que pour la th\u00e9rapie. Le Dr Stephan Tetter, premier auteur de l’article, a soulign\u00e9 le caract\u00e8re inattendu des r\u00e9sultats, notant que “la cryo-ME transforme notre compr\u00e9hension de la pathologie mol\u00e9culaire de la d\u00e9mence et des maladies neurod\u00e9g\u00e9n\u00e9ratives de mani\u00e8re plus large.”<\/p>\n\n\n\n

Malgr\u00e9 les contraintes techniques limitant l’\u00e9tude \u00e0 quatre individus, la nouvelle connaissance ouvre la porte \u00e0 des investigations plus larges. Le Dr Ryskeldi-Falcon a exprim\u00e9 le potentiel de d\u00e9velopper des outils pour scruter les agr\u00e9gats anormaux de TAF15 dans des centaines d’\u00e9chantillons de patients, r\u00e9v\u00e9lant la pr\u00e9valence de cette anomalie prot\u00e9ique sp\u00e9cifique.<\/p>\n\n\n\n

L’\u00e9tude a \u00e9galement \u00e9clair\u00e9 la chevauch\u00e9e entre la d\u00e9mence frontotemporale et la maladie des motoneurones, deux individus pr\u00e9sentant des signes des deux affections. Les chercheurs ont identifi\u00e9 la m\u00eame structure agr\u00e9g\u00e9e de TAF15 dans les r\u00e9gions c\u00e9r\u00e9brales associ\u00e9es \u00e0 la maladie des motoneurones.<\/p>\n\n\n\n

Cette recherche r\u00e9volutionnaire a \u00e9t\u00e9 rendue possible gr\u00e2ce au financement de diverses organisations, dont le Medical Research Council, Alzheimer’s Research UK, les National Institutes of Health am\u00e9ricains, la Alzheimer’s Society, et d’autres. La Dr. Charlotte Durkin, responsable de la Molecular and Cellular Medicine Board du Medical Research Council, a salu\u00e9 l’importance de l’\u00e9tude, d\u00e9clarant : “Conna\u00eetre l’identit\u00e9 et la structure de base de ces filaments dans cette forme rare de d\u00e9mence pr\u00e9coce est vital pour d\u00e9velopper des tests diagnostiques pr\u00e9coces et des m\u00e9dicaments pour lutter contre leur formation.”<\/p>\n\n\n\n

Alors que nous naviguons dans le paysage complexe des maladies neurod\u00e9g\u00e9n\u00e9ratives, chaque d\u00e9couverte nous rapproche de la compr\u00e9hension des myst\u00e8res de ces affections, offrant un nouvel espoir pour une pr\u00e9cision diagnostique am\u00e9lior\u00e9e et des interventions th\u00e9rapeutiques cibl\u00e9es.<\/p>\n","protected":false},"excerpt":{"rendered":"

Date : 6 d\u00e9cembre 2023 Dans une r\u00e9v\u00e9lation r\u00e9volutionnaire, des scientifiques ont d\u00e9couvert une prot\u00e9ine jusqu’alors inconnue associ\u00e9e \u00e0 la d\u00e9mence pr\u00e9coce, une forme de trouble neurod\u00e9g\u00e9n\u00e9ratif connue sous le nom de d\u00e9mence frontotemporale (DFT). Cette d\u00e9couverte promet un changement d\u00e9cisif dans notre compr\u00e9hension de la base mol\u00e9culaire de la DFT, offrant l’espoir d’avanc\u00e9es diagnostiques […]<\/p>\n","protected":false},"author":1,"featured_media":69264,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[684],"tags":[],"class_list":["post-69260","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouvelles-pharmaceutiques"],"_links":{"self":[{"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/posts\/69260","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/comments?post=69260"}],"version-history":[{"count":3,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/posts\/69260\/revisions"}],"predecessor-version":[{"id":69265,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/posts\/69260\/revisions\/69265"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/media\/69264"}],"wp:attachment":[{"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/media?parent=69260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/categories?post=69260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pharmacie-vezere.com\/promotions\/wp-json\/wp\/v2\/tags?post=69260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}