{"id":1651,"date":"2024-08-01T00:32:15","date_gmt":"2024-08-01T04:32:15","guid":{"rendered":"https:\/\/medicamentquebec.ca\/?p=1651"},"modified":"2025-12-05T14:43:58","modified_gmt":"2025-12-05T19:43:58","slug":"un-projet-prometteur-pour-la-therapie-basee-sur-larn-une-plateforme-dadministration-et-de-ciblage","status":"publish","type":"post","link":"https:\/\/medicamentquebec.ca\/index.php\/2024\/08\/01\/un-projet-prometteur-pour-la-therapie-basee-sur-larn-une-plateforme-dadministration-et-de-ciblage\/","title":{"rendered":"Un projet prometteur pour la th\u00e9rapie bas\u00e9e sur l\u2019ARN\u00a0: une plateforme d\u2019administration et de ciblage!"},"content":{"rendered":"\r\n<p><strong>1 ao\u00fbt 2024 &#8211; Activit\u00e9 financ\u00e9es<\/strong><\/p>\r\n<p><!--more--><\/p>\r\n\r\n\r\n\r\n<p>M\u00e9dicament Qu\u00e9bec soutient un projet d\u2019envergure \u00ab Nucleic Acid Platformfor Cell-Specific Drug Targeting \u00bb dont l\u2019objectif est le d\u00e9veloppement d\u2019une plateforme d&#8217;administration et de ciblage pour les th\u00e9rapies bas\u00e9e sur l\u2019ARN.<\/p>\r\n\r\n\r\n\r\n<p>Dirig\u00e9 par <a href=\"https:\/\/www.mcgill.ca\/chemistry\/faculty\/hanadi-sleiman\">Hanadi Sleiman<\/a>, <a href=\"https:\/\/www.mcgill.ca\/chemistry\/faculty\/maureen-mckeague\">Maureen McKeague<\/a>, <a href=\"https:\/\/www.mcgill.ca\/chemistry\/faculty\/masad-damha\">Masad Damha<\/a> et <a href=\"https:\/\/www.mcgill.ca\/chemistry\/faculty\/nicolas-moitessier\">Nicolas Moitesseir<\/a> de l\u2019Universit\u00e9 McGill, ce projet propose une plateforme d\u2019acide nucl\u00e9ique pour la synth\u00e8se et le d\u00e9veloppement de ciblage de m\u00e9dicaments sp\u00e9cifiques aux cellules. Il r\u00e9pond \u00e0 un besoin majeur non satisfait dans l\u2019industrie pharmaceutique.<\/p>\r\n\r\n\r\n\r\n<p>L&#8217;administration cibl\u00e9e de m\u00e9dicaments atteint les cellules ou des tissus sp\u00e9cifiques, les dommages et les effets secondaires sur les tissus sains sont minimis\u00e9s. Le ciblage des m\u00e9dicaments, incontournable pour les m\u00e9dicaments peu solubles ou rapidement m\u00e9tabolis\u00e9s, optimise \u00e9galement les concentrations de m\u00e9dicaments et engendre une efficacit\u00e9 am\u00e9lior\u00e9e.<\/p>\r\n\r\n\r\n\r\n<p><strong>Deux modalit\u00e9s uniques qui font la diff\u00e9rence\u00a0!<\/strong><\/p>\r\n\r\n\r\n\r\n<p>La plateforme se compose de deux modalit\u00e9s uniques qui combinent une chimie nouvelle et diversifi\u00e9e et un criblage \u00e0 haut d\u00e9bit via des codes-barres.<\/p>\r\n\r\n\r\n\r\n<p>La premi\u00e8re modalit\u00e9 conduit au d\u00e9veloppement d\u2019 \u00ab aptam\u00e8res \u00bb \u00e0 base d\u2019acide nucl\u00e9ique compos\u00e9s d\u2019\u00e9l\u00e9ments chimiques modifi\u00e9s et hautement actifs. Ces aptam\u00e8res sont con\u00e7us pour reconna\u00eetre et cibler sp\u00e9cifiquement tout biomarqueur th\u00e9rapeutique sp\u00e9cifique.<\/p>\r\n\r\n\r\n\r\n<pre class=\"wp-block-preformatted\">La deuxi\u00e8me modalit\u00e9 aboutit au d\u00e9veloppement de v\u00e9hicules porteurs de m\u00e9dicaments compos\u00e9s d'acides nucl\u00e9iques modifi\u00e9s, qui permettent l'administration de m\u00e9dicaments directement dans les cellules cibles. Ceci est particuli\u00e8rement important car, bien que le nombre de nouveaux traitements \u00e0 base d\u2019ARN en cours de d\u00e9veloppement soit important, ceux-ci ne peuvent pas \u00eatre administr\u00e9s \u00e0 des tissus autres que le foie et les reins. Les structures cr\u00e9\u00e9es sont assembl\u00e9es de mani\u00e8re fiable, ce qui donne lieu \u00e0 des v\u00e9hicules d'administration uniformes, sans variation d'un lot \u00e0 l'autre, et donc \u00e0 une administration efficace des m\u00e9dicaments. En tant que telle, cette deuxi\u00e8me modalit\u00e9 permettra l\u2019administration de \u00ab n\u2019importe quel m\u00e9dicament \u00bb \u00e0 des organes et tissus sp\u00e9cifiques, y compris les tissus malades.<\/pre>\r\n\r\n\r\n\r\n<pre class=\"wp-block-preformatted\">\u00a0<\/pre>\r\n\r\n\r\n\r\n<p>Dans les deux modalit\u00e9s, les nouveaux \u00e9l\u00e9ments chimiques d\u2019acide nucl\u00e9ique combinent les propri\u00e9t\u00e9s \u00ab simples \u00e0 synth\u00e9tiser \u00bb de l\u2019ADN et de l\u2019ARN mais \u00e9largissent leur fonction, ce qui donne lieu \u00e0 diverses th\u00e9rapies et structures qui peuvent \u00eatre m\u00e9lang\u00e9es et adapt\u00e9es \u00e0 n\u2019importe quel m\u00e9dicament et maladie. Ainsi sera \u00e9tablie, la capacit\u00e9 du Qu\u00e9bec \u00e0 synth\u00e9tiser de grandes biblioth\u00e8ques (des millions de candidats) et \u00e0 \u00e9tiqueter chaque biblioth\u00e8que candidate avec un \u00ab code-barres ADN \u00bb afin de pouvoir d\u00e9pister rapidement toute activit\u00e9 ciblant une maladie ou toute d\u00e9livrance sp\u00e9cifique \u00e0 une cellule.<\/p>\r\n\r\n\r\n\r\n<p><strong>Les principales \u00e9tapes\u00a0!<\/strong><\/p>\r\n\r\n\r\n\r\n<p>1. La production d\u2019un pipeline pour de nouveaux \u00e9l\u00e9ments de base chimiques \u00e0 base d\u2019acide nucl\u00e9ique. \u00c9l\u00e9ment cl\u00e9 de cette innovation, ce pipeline permettra de synth\u00e9tiser des modifications pouvant \u00eatre utilis\u00e9es sur l\u2019infrastructure des synth\u00e9tiseurs d\u2019ADN.<\/p>\r\n\r\n\r\n\r\n<p>2) Le module de synth\u00e8se et de d\u00e9couverte d&#8217;aptam\u00e8res ciblant les cellules. Une strat\u00e9gie de synth\u00e8se et de fabrication sera d\u00e9velopp\u00e9e pour incorporer les \u00e9l\u00e9ments constitutifs modifi\u00e9s dans de grandes biblioth\u00e8ques d&#8217;aptam\u00e8res pour le criblage de cibles cellulaires.<\/p>\r\n\r\n\r\n\r\n<p>3) Plateforme d&#8217;assemblage de diverses nanostructures d&#8217;administration de m\u00e9dicaments Une large biblioth\u00e8que de nanostructures d\u2019ADN coupl\u00e9es \u00e0 des th\u00e9rapies \u00e0 base d\u2019ARN sera produite.<\/p>\r\n\r\n\r\n\r\n<p>4) Syst\u00e8me de d\u00e9couverte \u00e0 haut d\u00e9bit pour une absorption et une administration am\u00e9lior\u00e9es et sp\u00e9cifiques de m\u00e9dicaments. Toutes les nanostructures cibl\u00e9es seront dot\u00e9es d&#8217;un code-barres afin que leur introduction dans les cellules et leur emplacement dans les syst\u00e8mes organo\u00efdes ou in vivo puissent \u00eatre suivis. Un travail de validation de principe sera r\u00e9alis\u00e9 sur des mod\u00e8les de cancer du sein et de leuc\u00e9mie.<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>1 ao\u00fbt 2024 &#8211; Activit\u00e9 financ\u00e9es<\/p>\n","protected":false},"author":5,"featured_media":3134,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85,96],"tags":[],"class_list":["post-1651","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-pilliers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Un projet prometteur pour la th\u00e9rapie bas\u00e9e sur l\u2019ARN\u00a0: une plateforme d\u2019administration et de ciblage! - M\u00e9dicament Qu\u00e9bec<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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