{"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\/sv\/2023\/07\/researchers-use-machine-learning-to-resurrect-ancient-molecules\/","title":{"rendered":"Forskare anv\u00e4nder maskininl\u00e4rning f\u00f6r att \"\u00e5teruppliva\" gamla molekyler"},"content":{"rendered":"<p><b>Ett team av bioingenj\u00f6rer har framg\u00e5ngsrikt anv\u00e4nt AI f\u00f6r att \u00e5teruppliva molekyler fr\u00e5n v\u00e5rt forntida f\u00f6rflutna.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Denna sp\u00e4nnande studie anv\u00e4nde maskininl\u00e4rning (ML) f\u00f6r att analysera proteindata fr\u00e5n moderna m\u00e4nniskor (<\/span><i><span style=\"font-weight: 400;\">Homo sapiens<\/span><\/i><span style=\"font-weight: 400;\">) samt fr\u00e5n v\u00e5ra utd\u00f6da sl\u00e4ktingar, neandertalarna (<\/span><i><span style=\"font-weight: 400;\">Homo neanderthalensis<\/span><\/i><span style=\"font-weight: 400;\">) och Denisovaner, en utd\u00f6d art eller underart av m\u00e4nniskor fr\u00e5n Asien.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Den <\/span><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1931312823002962?via%3Dihub\"><span style=\"font-weight: 400;\">studie<\/span><\/a><span style=\"font-weight: 400;\"> uppt\u00e4ckt molekyler med potential att bek\u00e4mpa sjukdomsframkallande bakterier. Dessa tekniker, som kallas \"de-extinction\", skulle potentiellt kunna ligga till grund f\u00f6r att hitta nya antibiotika.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Vi motiveras av tanken p\u00e5 att f\u00f6ra tillbaka molekyler fr\u00e5n det f\u00f6rflutna f\u00f6r att l\u00f6sa problem som vi har idag\", s\u00e4ger Cesar de la Fuente, medf\u00f6rfattare till studien och bioingenj\u00f6r vid University of Pennsylvania i Philadelphia, <\/span><a href=\"https:\/\/www.nature.com\/articles\/d41586-023-02403-0\"><span style=\"font-weight: 400;\">ber\u00e4ttade f\u00f6r Nature<\/span><\/a><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>\n<p>Om detta f\u00e5r dig att t\u00e4nka p\u00e5 en viss dinosauriebaserad filmserie <span style=\"font-weight: 400;\">-<\/span> Det var just det som inspirerade forskargruppen.<\/p>\n<p>De la Fuente sa: \"Vi b\u00f6rjade faktiskt fundera p\u00e5\u00a0<i>Jurassic Park<\/i>\", s\u00e4ger han. I st\u00e4llet f\u00f6r att \u00e5teruppliva dinosaurier, som forskarna gjorde i filmen fr\u00e5n 1993, kom teamet p\u00e5 en mer genomf\u00f6rbar id\u00e9: \"Varf\u00f6r inte \u00e5teruppliva molekyler?\"<\/p>\n<p><span style=\"font-weight: 400;\">Det finns ett enormt tryck p\u00e5 forskarna att hitta nya antibiotika, och f\u00e5 effektiva l\u00e4kemedel har uppt\u00e4ckts under de senaste 30 \u00e5ren.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> Samtidigt \u00f6kar f\u00f6rekomsten av antibiotikaresistenta bakterier, vilket g\u00f6r att nya behandlingsmetoder \u00e4r v\u00e4lkomna. <\/span><span style=\"font-weight: 400;\">AI tillhandah\u00e5ller <a href=\"https:\/\/dailyai.com\/sv\/2023\/05\/ai-helps-researchers-discover-a-new-antibiotic-for-treating-drug-resistant-bacteria\/\">m\u00e5nga m\u00f6jligheter<\/a> f\u00f6r att utforska dessa nya behandlingar, med en rad studier som utnyttjar tekniken f\u00f6r att avsl\u00f6ja dolda och ok\u00e4nda kliniskt relevanta molekyler.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">M\u00e5nga organismer genererar korta proteinsubenheter, s\u00e5 kallade peptider, med antimikrobiella egenskaper. Flera antimikrobiella peptider, som fr\u00e4mst kommer fr\u00e5n bakterier, anv\u00e4nds f\u00f6r att behandla infektioner.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Proteiner fr\u00e5n utd\u00f6da arter - inklusive m\u00e4nniskan - kan utg\u00f6ra en v\u00e4rdefull men \u00e4nnu outforskad resurs f\u00f6r att utveckla nya antibiotika.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Forskarna tr\u00e4nade en ML-algoritm f\u00f6r att identifiera platser p\u00e5 m\u00e4nskliga proteiner d\u00e4r de sk\u00e4rs upp i peptider. De till\u00e4mpade denna algoritm p\u00e5 offentligt tillg\u00e4ngliga proteinsekvenser fr\u00e5n <\/span><i><span style=\"font-weight: 400;\">H. sapiens, H. neanderthalensis<\/span><\/i><span style=\"font-weight: 400;\">och Denisovans, och identifierade nya peptider baserat p\u00e5 egenskaperna hos k\u00e4nda antimikrobiella peptider.\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=\"AI utrotning av utrotning\" 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\">Molekyl\u00e4r \"de-extinction\" med AI. K\u00e4llan \u00e4r: <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1931312823002962?via%3Dihub\">Molekyl\u00e4r de-extinction av gamla antimikrobiella peptider m\u00f6jliggjord genom maskininl\u00e4rning<\/a>.<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Det tar bara n\u00e5gra veckor att identifiera och testa potentiella l\u00e4kemedelskandidater med hj\u00e4lp av AI, j\u00e4mf\u00f6rt med den traditionella processen som tar mellan 3 och 6 m\u00e5nader f\u00f6r att uppt\u00e4cka ett nytt antibiotikum.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Teamet testade en rad olika peptider i laboratoriemilj\u00f6 f\u00f6r att unders\u00f6ka deras f\u00f6rm\u00e5ga att eliminera bakterier. De valde ut 6 potenta peptider - 4 fr\u00e5n <\/span><i><span style=\"font-weight: 400;\">H. sapiens<\/span><\/i><span style=\"font-weight: 400;\">, 1 fr\u00e5n <\/span><i><span style=\"font-weight: 400;\">H. neanderthalensis<\/span><\/i><span style=\"font-weight: 400;\">och 1 fr\u00e5n Denisovans. Peptiderna testades p\u00e5 m\u00f6ss som var infekterade med <\/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;\">\u00c4ven om ingen av peptiderna helt d\u00f6dade bakterierna lyckades de alla h\u00e4mma tillv\u00e4xten av <\/span><i><span style=\"font-weight: 400;\">A. baumannii <\/span><\/i><span style=\"font-weight: 400;\">i muskelv\u00e4vnad i l\u00e5ret. 5 molekyler d\u00f6dade bakterier i hudabscesser, \u00e4ven om det kr\u00e4vdes h\u00f6ga doser.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"\u00c4ven om den algoritm som vi anv\u00e4nde inte gav n\u00e5gra fantastiska molekyler, tror jag att konceptet och ramverket utg\u00f6r en helt ny v\u00e4g f\u00f6r att t\u00e4nka p\u00e5 l\u00e4kemedelsuppt\u00e4ckt\", s\u00e4ger de la Fuente.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Euan Ashley, expert p\u00e5 genomik och precisionsh\u00e4lsa vid Stanford University, kommenterade: \"De la Fuente och hans kollegor \u00f6vertygade mig om att det var en intressant och potentiellt anv\u00e4ndbar metod att dyka ner i det arkaiska m\u00e4nskliga genomet.\"<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Hur studien fungerade: en sammanfattning<\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Forskarna ville \u00e5teruppliva (eller \"de-extinct\") bioaktiva molekyler som inte l\u00e4ngre produceras av levande organismer. Dessa molekyler skulle potentiellt kunna anv\u00e4ndas f\u00f6r l\u00e4kemedelsuppt\u00e4ckt.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">De anv\u00e4nde en maskininl\u00e4rningsmodell (ML) som kallas panCleave. Detta \u00e4r en \"random forest\"-modell, en typ av AI-algoritm som f\u00f6rutsp\u00e5r resultat baserat p\u00e5 m\u00e5nga indata. PanCleave-modellen f\u00f6rutsp\u00e5dde var proteiner skulle delas upp i mindre delar, s\u00e5 kallade peptider. Dessa peptider har ibland antimikrobiella egenskaper.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Resultatet: Forskarna hittade flera peptider (b\u00e5de fr\u00e5n moderna m\u00e4nniskor och utd\u00f6da sl\u00e4ktingar till m\u00e4nniskan) som visade potential som antimikrobiella medel n\u00e4r de testades i labbet.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bland annat testades motst\u00e5ndskraften mot att brytas ned av andra proteiner och f\u00f6rm\u00e5gan att tr\u00e4nga igenom cellmembran. N\u00e5gra av peptiderna bek\u00e4mpade effektivt en vanlig bakterieinfektion i hudabscesser hos m\u00f6ss.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Maskininl\u00e4rningsmetoder kan identifiera lovande peptider f\u00f6r utveckling av nya antibiotika. Dessutom f\u00f6resl\u00e5s \"molekyl\u00e4r de-extinction\" (\u00e5teruppv\u00e4ckande av molekyler fr\u00e5n utd\u00f6da organismer) som ett nytt ramverk f\u00f6r l\u00e4kemedelsuppt\u00e4ckt, s\u00e4rskilt f\u00f6r att hitta nya antibiotika.<\/span><\/li>\n<\/ul>\n<p>AI:s potential f\u00f6r att uppt\u00e4cka nya l\u00e4kemedel i stor skala visar sig vara enorm, och inte bara antibiotika utan <a href=\"https:\/\/dailyai.com\/sv\/2023\/07\/ai-accelerates-discovery-of-anti-aging-drugs-in-new-study\/\">l\u00e4kemedel mot \u00e5ldrande och andra f\u00f6reningar<\/a>\u00a0ocks\u00e5.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ett team av bioingenj\u00f6rer har framg\u00e5ngsrikt anv\u00e4nt AI f\u00f6r att \u00e5teruppliva molekyler fr\u00e5n v\u00e5rt forntida f\u00f6rflutna.  I denna sp\u00e4nnande studie anv\u00e4ndes maskininl\u00e4rning (ML) f\u00f6r att analysera proteindata fr\u00e5n moderna m\u00e4nniskor (Homo sapiens) samt fr\u00e5n v\u00e5ra utd\u00f6da sl\u00e4ktingar neandertalarna (Homo neanderthalensis) och denisovanerna, en utd\u00f6d art eller underart av m\u00e4nniskor fr\u00e5n Asien.  I studien uppt\u00e4cktes molekyler med potential att bek\u00e4mpa sjukdomsframkallande bakterier. Dessa tekniker, som kallas \"de-extinction\", skulle potentiellt kunna ligga till grund f\u00f6r att hitta nya antibiotika. \"Vi motiveras av tanken p\u00e5 att f\u00f6ra tillbaka molekyler fr\u00e5n det f\u00f6rflutna f\u00f6r att l\u00f6sa problem som vi har idag\", s\u00e4ger 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\/sv\/2023\/07\/researchers-use-machine-learning-to-resurrect-ancient-molecules\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Researchers use machine learning to &#039;resurrect&#039; 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