{"id":3376,"date":"2023-07-29T14:42:58","date_gmt":"2023-07-29T14:42:58","guid":{"rendered":"https:\/\/dailyai.com\/?p=3376"},"modified":"2023-07-31T09:16:54","modified_gmt":"2023-07-31T09:16:54","slug":"researchers-use-machine-learning-to-resurrect-ancient-molecules","status":"publish","type":"post","link":"https:\/\/dailyai.com\/fr\/2023\/07\/researchers-use-machine-learning-to-resurrect-ancient-molecules\/","title":{"rendered":"Des chercheurs utilisent l'apprentissage automatique pour \"ressusciter\" d'anciennes mol\u00e9cules"},"content":{"rendered":"<p><b>Une \u00e9quipe de bioing\u00e9nieurs a r\u00e9ussi \u00e0 utiliser l'IA pour ressusciter des mol\u00e9cules de notre pass\u00e9 ancien.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Cette \u00e9tude intrigante a utilis\u00e9 l'apprentissage automatique pour analyser les donn\u00e9es sur les prot\u00e9ines des humains modernes (<\/span><i><span style=\"font-weight: 400;\">Homo sapiens<\/span><\/i><span style=\"font-weight: 400;\">) ainsi que de nos parents disparus, les N\u00e9andertaliens (<\/span><i><span style=\"font-weight: 400;\">Homo neanderthalensis<\/span><\/i><span style=\"font-weight: 400;\">) et les Denisovans, une esp\u00e8ce ou sous-esp\u00e8ce humaine \u00e9teinte d'Asie.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les <\/span><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1931312823002962?via%3Dihub\"><span style=\"font-weight: 400;\">\u00e9tude<\/span><\/a><span style=\"font-weight: 400;\"> a d\u00e9couvert des mol\u00e9cules susceptibles de combattre les bact\u00e9ries pathog\u00e8nes. Ces techniques, appel\u00e9es \"de-extinction\", pourraient potentiellement servir de base \u00e0 la recherche de nouveaux antibiotiques.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Nous sommes motiv\u00e9s par l'id\u00e9e de ramener des mol\u00e9cules du pass\u00e9 pour r\u00e9soudre des probl\u00e8mes actuels\", explique Cesar de la Fuente, coauteur de l'\u00e9tude et bioing\u00e9nieur \u00e0 l'universit\u00e9 de Pennsylvanie, \u00e0 Philadelphie, <\/span><a href=\"https:\/\/www.nature.com\/articles\/d41586-023-02403-0\"><span style=\"font-weight: 400;\">a d\u00e9clar\u00e9 \u00e0 Nature<\/span><\/a><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>\n<p>Si cela vous fait penser \u00e0 une certaine franchise cin\u00e9matographique bas\u00e9e sur les dinosaures <span style=\"font-weight: 400;\">-<\/span> c'est pr\u00e9cis\u00e9ment ce qui a inspir\u00e9 l'\u00e9quipe de recherche.<\/p>\n<p>De la Fuente a d\u00e9clar\u00e9 : \"Nous avons commenc\u00e9 \u00e0 penser \u00e0\u00a0<i>Jurassic Park<\/i>\", explique-t-il. Plut\u00f4t que de ramener les dinosaures \u00e0 la vie, comme l'ont fait les scientifiques dans le film de 1993, l'\u00e9quipe a eu une id\u00e9e plus r\u00e9alisable : \"Pourquoi ne pas ramener les mol\u00e9cules ?\"<\/p>\n<p><span style=\"font-weight: 400;\">La pression exerc\u00e9e sur les chercheurs pour trouver de nouveaux antibiotiques est immense, car peu de m\u00e9dicaments efficaces ont \u00e9t\u00e9 d\u00e9couverts au cours des 30 derni\u00e8res ann\u00e9es.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> Parall\u00e8lement, la pr\u00e9valence des bact\u00e9ries r\u00e9sistantes aux antibiotiques est en augmentation, d'o\u00f9 l'int\u00e9r\u00eat de nouveaux traitements. <\/span><span style=\"font-weight: 400;\">L'IA fournit <a href=\"https:\/\/dailyai.com\/fr\/2023\/05\/ai-helps-researchers-discover-a-new-antibiotic-for-treating-drug-resistant-bacteria\/\">de nombreuses pistes<\/a> pour explorer ces nouveaux traitements, avec une s\u00e9rie d'\u00e9tudes utilisant la technologie pour d\u00e9couvrir des mol\u00e9cules cach\u00e9es et inconnues cliniquement pertinentes.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">De nombreux organismes g\u00e9n\u00e8rent des sous-unit\u00e9s prot\u00e9iques courtes, appel\u00e9es peptides, dot\u00e9es de propri\u00e9t\u00e9s antimicrobiennes. Plusieurs peptides antimicrobiens, provenant principalement de bact\u00e9ries, sont utilis\u00e9s pour traiter les infections.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les prot\u00e9ines des esp\u00e8ces disparues - y compris l'homme - pourraient constituer une ressource pr\u00e9cieuse, mais encore peu explor\u00e9e, pour la mise au point de nouveaux antibiotiques.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les chercheurs ont entra\u00een\u00e9 un algorithme de ML pour identifier les endroits des prot\u00e9ines humaines o\u00f9 elles sont d\u00e9coup\u00e9es en peptides. Ils ont appliqu\u00e9 cet algorithme \u00e0 des s\u00e9quences de prot\u00e9ines accessibles au public provenant de <\/span><i><span style=\"font-weight: 400;\">H. sapiens, H. neanderthalensis<\/span><\/i><span style=\"font-weight: 400;\">et Denisovans, en identifiant de nouveaux peptides sur la base des caract\u00e9ristiques des peptides antimicrobiens connus.\u00a0<\/span><\/p>\n<figure id=\"attachment_3377\" aria-describedby=\"caption-attachment-3377\" style=\"width: 729px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3377\" src=\"https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg.jpg\" alt=\"La d\u00e9-extinction de l&#039;IA\" width=\"729\" height=\"729\" srcset=\"https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg.jpg 996w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-300x300.jpg 300w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-150x150.jpg 150w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-768x768.jpg 768w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-180x180.jpg 180w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-90x90.jpg 90w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-370x370.jpg 370w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-800x800.jpg 800w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-20x20.jpg 20w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-740x740.jpg 740w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-24x24.jpg 24w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-48x48.jpg 48w, https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/1-s2.0-S1931312823002962-fx1_lrg-96x96.jpg 96w\" sizes=\"auto, (max-width: 729px) 100vw, 729px\" \/><figcaption id=\"caption-attachment-3377\" class=\"wp-caption-text\">La \"d\u00e9-extinction\" mol\u00e9culaire gr\u00e2ce \u00e0 l'IA. Source : <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1931312823002962?via%3Dihub\">D\u00e9-extinction mol\u00e9culaire d'anciens peptides antimicrobiens gr\u00e2ce \u00e0 l'apprentissage automatique<\/a>.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Il ne faut que quelques semaines pour identifier et tester des m\u00e9dicaments potentiels \u00e0 l'aide de l'IA, alors que le processus traditionnel prend de trois \u00e0 six semaines pour d\u00e9couvrir un nouvel antibiotique.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">L'\u00e9quipe a test\u00e9 une vari\u00e9t\u00e9 de peptides en laboratoire afin d'explorer leur capacit\u00e9 \u00e0 \u00e9liminer les bact\u00e9ries. Ils ont s\u00e9lectionn\u00e9 6 peptides puissants - 4 provenant de <\/span><i><span style=\"font-weight: 400;\">H. sapiens<\/span><\/i><span style=\"font-weight: 400;\">, 1 \u00e0 partir de <\/span><i><span style=\"font-weight: 400;\">H. neanderthalensis<\/span><\/i><span style=\"font-weight: 400;\">et 1 de Denisovans. Les peptides ont \u00e9t\u00e9 test\u00e9s sur des souris infect\u00e9es par la bact\u00e9rie <\/span><i><span style=\"font-weight: 400;\">Acinetobacter baumannii<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Bien qu'aucun des peptides n'ait compl\u00e8tement tu\u00e9 les bact\u00e9ries, ils ont tous r\u00e9ussi \u00e0 inhiber la croissance du <\/span><i><span style=\"font-weight: 400;\">A. baumannii <\/span><\/i><span style=\"font-weight: 400;\">dans le tissu musculaire de la cuisse. 5 mol\u00e9cules ont tu\u00e9 des bact\u00e9ries dans des abc\u00e8s cutan\u00e9s, bien que des doses \u00e9lev\u00e9es aient \u00e9t\u00e9 n\u00e9cessaires.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"M\u00eame si l'algorithme que nous avons utilis\u00e9 n'a pas produit de mol\u00e9cules extraordinaires, je pense que le concept et le cadre repr\u00e9sentent une voie enti\u00e8rement nouvelle pour la r\u00e9flexion sur la d\u00e9couverte de m\u00e9dicaments\", d\u00e9clare M. de la Fuente.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Euan Ashley, expert en g\u00e9nomique et en sant\u00e9 de pr\u00e9cision \u00e0 l'universit\u00e9 de Stanford, a d\u00e9clar\u00e9 : \"De la Fuente et ses coll\u00e8gues m'ont persuad\u00e9 que plonger dans le g\u00e9nome humain archa\u00efque \u00e9tait une approche int\u00e9ressante et potentiellement utile\".<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Fonctionnement de l'\u00e9tude : analyse<\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Les chercheurs ont entrepris de ressusciter (ou \"d\u00e9sextinction\") des mol\u00e9cules bioactives qui ne sont plus produites par les organismes vivants. Ces mol\u00e9cules pourraient potentiellement \u00eatre utilis\u00e9es pour la d\u00e9couverte de m\u00e9dicaments.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ils ont utilis\u00e9 un mod\u00e8le d'apprentissage automatique connu sous le nom de panCleave. Il s'agit d'un mod\u00e8le de \"for\u00eat al\u00e9atoire\", un type d'algorithme d'intelligence artificielle qui pr\u00e9dit des r\u00e9sultats sur la base de nombreuses donn\u00e9es. Le mod\u00e8le panCleave a pr\u00e9dit o\u00f9 les prot\u00e9ines seraient divis\u00e9es en parties plus petites appel\u00e9es peptides. Ces peptides ont parfois des propri\u00e9t\u00e9s antimicrobiennes.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Le r\u00e9sultat : Les chercheurs ont trouv\u00e9 plusieurs peptides (provenant d'humains modernes et de parents humains disparus) qui se sont r\u00e9v\u00e9l\u00e9s \u00eatre des agents antimicrobiens potentiels lorsqu'ils ont \u00e9t\u00e9 test\u00e9s en laboratoire.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Les tests portaient notamment sur la r\u00e9sistance \u00e0 la rupture par d'autres prot\u00e9ines et sur la capacit\u00e9 de perm\u00e9abilit\u00e9 des membranes cellulaires. Certains des peptides ont combattu efficacement une infection bact\u00e9rienne courante dans les abc\u00e8s cutan\u00e9s des souris.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Les m\u00e9thodes d'apprentissage automatique peuvent identifier des peptides prometteurs pour le d\u00e9veloppement de nouveaux antibiotiques. En outre, la \"d\u00e9-extinction mol\u00e9culaire\" (ressusciter des mol\u00e9cules \u00e0 partir d'organismes \u00e9teints) est propos\u00e9e comme nouveau cadre pour la d\u00e9couverte de m\u00e9dicaments, en particulier pour trouver de nouveaux antibiotiques.<\/span><\/li>\n<\/ul>\n<p>Le potentiel de l'IA pour la d\u00e9couverte de nouveaux m\u00e9dicaments \u00e0 grande \u00e9chelle s'av\u00e8re immense, et pas seulement pour les antibiotiques, mais aussi pour les vaccins. <a href=\"https:\/\/dailyai.com\/fr\/2023\/07\/ai-accelerates-discovery-of-anti-aging-drugs-in-new-study\/\">m\u00e9dicaments anti-\u00e2ge et autres compos\u00e9s<\/a>\u00a0aussi.<\/p>","protected":false},"excerpt":{"rendered":"<p>Une \u00e9quipe de bioing\u00e9nieurs a r\u00e9ussi \u00e0 utiliser l'IA pour ressusciter des mol\u00e9cules de notre pass\u00e9 ancien.  Cette \u00e9tude intrigante a utilis\u00e9 l'apprentissage automatique pour analyser les donn\u00e9es prot\u00e9iques des humains modernes (Homo sapiens) ainsi que de nos parents disparus, les N\u00e9andertaliens (Homo neanderthalensis) et les D\u00e9nisoviens, une esp\u00e8ce ou sous-esp\u00e8ce humaine disparue d'Asie.  L'\u00e9tude a permis de d\u00e9couvrir des mol\u00e9cules susceptibles de combattre les bact\u00e9ries pathog\u00e8nes. Ces techniques, appel\u00e9es \"de-extinction\", pourraient servir de base \u00e0 la recherche de nouveaux antibiotiques. \"Nous sommes motiv\u00e9s par l'id\u00e9e de ramener des mol\u00e9cules du pass\u00e9 pour r\u00e9soudre des probl\u00e8mes actuels\", a d\u00e9clar\u00e9 Cesar de la Fuente,<\/p>","protected":false},"author":2,"featured_media":3378,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[259,203,260,178,101],"class_list":["post-3376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-antibiotics","tag-biotech","tag-drug-discovery","tag-medicine","tag-medtech"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Researchers use machine learning to &#039;resurrect&#039; ancient molecules | DailyAI<\/title>\n<meta name=\"description\" content=\"A team of bioengineers has successfully utilized AI to resurrect molecules from our ancient past.\u00a0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dailyai.com\/fr\/2023\/07\/researchers-use-machine-learning-to-resurrect-ancient-molecules\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Researchers use machine learning to &#039;resurrect&#039; ancient molecules | DailyAI\" \/>\n<meta property=\"og:description\" content=\"A team of bioengineers has successfully utilized AI to resurrect molecules from our ancient past.\u00a0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dailyai.com\/fr\/2023\/07\/researchers-use-machine-learning-to-resurrect-ancient-molecules\/\" \/>\n<meta property=\"og:site_name\" content=\"DailyAI\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-29T14:42:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-31T09:16:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dailyai.com\/wp-content\/uploads\/2023\/07\/shutterstock_1444962308.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"614\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Sam Jeans\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DailyAIOfficial\" \/>\n<meta name=\"twitter:site\" content=\"@DailyAIOfficial\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sam Jeans\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\\\/\\\/dailyai.com\\\/2023\\\/07\\\/researchers-use-machine-learning-to-resurrect-ancient-molecules\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/dailyai.com\\\/2023\\\/07\\\/researchers-use-machine-learning-to-resurrect-ancient-molecules\\\/\"},\"author\":{\"name\":\"Sam Jeans\",\"@id\":\"https:\\\/\\\/dailyai.com\\\/#\\\/schema\\\/person\\\/711e81f945549438e8bbc579efdeb3c9\"},\"headline\":\"Researchers use machine learning to &#8216;resurrect&#8217; 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