{"id":4779,"date":"2023-08-28T19:26:58","date_gmt":"2023-08-28T19:26:58","guid":{"rendered":"https:\/\/dailyai.com\/?p=4779"},"modified":"2023-08-28T22:45:53","modified_gmt":"2023-08-28T22:45:53","slug":"stanford-scientists-develop-ai-model-for-predicting-glioblastoma-outcomes","status":"publish","type":"post","link":"https:\/\/dailyai.com\/pt\/2023\/08\/stanford-scientists-develop-ai-model-for-predicting-glioblastoma-outcomes\/","title":{"rendered":"Cientistas de Stanford desenvolvem modelo de IA para prever os resultados do glioblastoma"},"content":{"rendered":"<p><b>Investigadores da Stanford Medicine desenvolveram um modelo de IA destinado a melhorar o diagn\u00f3stico e o tratamento do glioblastoma, uma forma particularmente agressiva de cancro do c\u00e9rebro.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">O glioblastoma apresenta desafios \u00fanicos para os profissionais m\u00e9dicos devido \u00e0 sua composi\u00e7\u00e3o celular altamente vari\u00e1vel de doente para doente.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Olivier Gevaert, professor associado de inform\u00e1tica biom\u00e9dica e ci\u00eancia dos dados, salientou a complexidade do tratamento do glioblastoma, afirmando: \"Devido \u00e0 heterogeneidade desta doen\u00e7a, os cientistas ainda n\u00e3o encontraram boas formas de a combater\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O <\/span><a href=\"https:\/\/med.stanford.edu\/news\/all-news\/2023\/08\/ai-brain-cancer-glioblastoma.html\"><span style=\"font-weight: 400;\">Modelo de IA<\/span><\/a><span style=\"font-weight: 400;\"> visa atenuar este problema atrav\u00e9s da an\u00e1lise de imagens coradas de tecido de glioblastoma para avaliar as suas caracter\u00edsticas, incluindo a agressividade do tumor e a sua composi\u00e7\u00e3o gen\u00e9tica.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Yuanning Zheng, do laborat\u00f3rio de Gevaert, <\/span><a href=\"https:\/\/www.nature.com\/articles\/s41467-023-39933-0\"><span style=\"font-weight: 400;\">descrito<\/span><\/a><span style=\"font-weight: 400;\"> o sistema de IA como \"uma esp\u00e9cie de sistema de apoio \u00e0 decis\u00e3o para os m\u00e9dicos\".\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">O modelo poder\u00e1 ajudar os m\u00e9dicos a identificar os doentes com caracter\u00edsticas celulares indicativas de tumores mais agressivos, sinalizando-os para um acompanhamento r\u00e1pido. O modelo c<\/span><span style=\"font-weight: 400;\">cria um mapa mais detalhado do tumor, revelando as interac\u00e7\u00f5es c\u00e9lula a c\u00e9lula e a forma como estas se correlacionam com os resultados dos doentes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gevaert elaborou: \"O modelo mostrou quais as c\u00e9lulas que gostam de estar juntas, quais as c\u00e9lulas que n\u00e3o querem comunicar e como isso se correlaciona com os resultados dos doentes\".\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Por exemplo, o modelo descobriu que o agrupamento de c\u00e9lulas espec\u00edficas, conhecidas como astr\u00f3citos, indicava uma forma mais agressiva do cancro. Estes conhecimentos poder\u00e3o ajudar a conceber tratamentos mais eficazes para o glioblastoma.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Zheng espera que o modelo possa tamb\u00e9m servir como ferramenta de avalia\u00e7\u00e3o p\u00f3s-operat\u00f3ria. O modelo mostrou que as c\u00e9lulas tumorais que apresentavam sinais de priva\u00e7\u00e3o de oxig\u00e9nio estavam frequentemente associadas a piores resultados em termos de cancro.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\"Ao iluminar as c\u00e9lulas carentes de oxig\u00e9nio em amostras de cirurgia com colora\u00e7\u00e3o histol\u00f3gica, o modelo pode ajudar os cirurgi\u00f5es a compreender quantas c\u00e9lulas cancerosas podem ainda estar no c\u00e9rebro e quando retomar o tratamento ap\u00f3s a cirurgia\", afirmou Zheng.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> Embora ainda em fase de investiga\u00e7\u00e3o, o modelo tem potencial para ser aplicado a outros cancros, como o cancro da mama ou do pulm\u00e3o.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> Zheng concluiu: \"Penso que estas integra\u00e7\u00f5es de dados multimodais podem moldar a melhoria da medicina personalizada no futuro\".<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Atualmente, uma vers\u00e3o de prova de conceito do seu modelo, designada GBM360, est\u00e1 dispon\u00edvel para os investigadores testarem e carregarem imagens de diagn\u00f3stico para preverem os resultados dos doentes com glioblastoma. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">No entanto, Zheng apressou-se a acrescentar que o modelo ainda est\u00e1 em fase de investiga\u00e7\u00e3o e n\u00e3o \u00e9 utilizado em contextos cl\u00ednicos reais.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Mais informa\u00e7\u00f5es sobre o estudo<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">O estudo utiliza a IA para interpretar os subtipos de glioblastoma a partir de dados de doentes existentes, ajudando os m\u00e9dicos a determinar o progn\u00f3stico e a evolu\u00e7\u00e3o da doen\u00e7a para diferentes doentes.\u00a0<\/span><\/p>\n<p>Eis como funciona:<\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Integra\u00e7\u00e3o de dados<\/strong>: Os investigadores come\u00e7aram por integrar v\u00e1rias formas de dados, incluindo a sequencia\u00e7\u00e3o de ARN de uma \u00fanica c\u00e9lula e a transcript\u00f3mica espacial, juntamente com os resultados cl\u00ednicos de doentes com glioblastoma. Isto proporcionou um conjunto de dados robusto para o desenvolvimento de modelos de aprendizagem autom\u00e1tica (ML).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Desenvolvimento de modelos<\/strong>: A equipa desenvolveu o GBM-CNN, um modelo especializado de aprendizagem profunda concebido para interpretar imagens histol\u00f3gicas. Este modelo foi treinado para prever os diferentes subtipos transcricionais das c\u00e9lulas de glioblastoma, utilizando os dados integrados para valida\u00e7\u00e3o.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>An\u00e1lise em grande escala<\/strong>: Ap\u00f3s o treino, a GBM-CNN foi utilizada para analisar mais de 40 milh\u00f5es de pontos de tecido de 410 pacientes, criando mapas celulares de alta resolu\u00e7\u00e3o. A an\u00e1lise revelou a presen\u00e7a de tr\u00eas a cinco subtipos malignos em cada tumor.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Correla\u00e7\u00e3o com dados cl\u00ednicos<\/strong>: Os mapas celulares foram depois integrados com os dados cl\u00ednicos dos doentes. Verificou-se que certas composi\u00e7\u00f5es celulares est\u00e3o associadas a piores resultados para os doentes.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Valida\u00e7\u00e3o e ensaios<\/strong>: Para corroborar estes resultados, foi desenvolvido um modelo secund\u00e1rio para prever o progn\u00f3stico dos doentes com base noutras imagens de diagn\u00f3stico. Este modelo confirmou os resultados iniciais, mostrando associa\u00e7\u00f5es entre a arquitetura celular e as taxas de sobreviv\u00eancia dos doentes.<\/span><\/li>\n<\/ol>\n<p>A IA est\u00e1 a acelerar enormemente as abordagens dos cuidados de sa\u00fade baseadas em dados, apoiando <a href=\"https:\/\/dailyai.com\/pt\/2023\/06\/ezra-receives-fda-clearance-for-ai-powered-mri-scanner\/\">Exame de resson\u00e2ncia magn\u00e9tica,<\/a> <a href=\"https:\/\/dailyai.com\/pt\/2023\/06\/ezra-receives-fda-clearance-for-ai-powered-mri-scanner\/\">diagn\u00f3stico de doen\u00e7as oculares<\/a>e sofisticado <a href=\"https:\/\/dailyai.com\/pt\/2023\/08\/ai-mind-reading-medical-breakthrough-or-step-towards-dystopia\/\">interfaces c\u00e9rebro-computador<\/a>para citar apenas algumas das suas in\u00fameras aplica\u00e7\u00f5es.<\/p>","protected":false},"excerpt":{"rendered":"<p>Investigadores da Stanford Medicine desenvolveram um modelo de IA destinado a melhorar o diagn\u00f3stico e o tratamento do glioblastoma, uma forma particularmente agressiva de cancro do c\u00e9rebro.  O glioblastoma apresenta desafios \u00fanicos para os profissionais m\u00e9dicos devido \u00e0 sua composi\u00e7\u00e3o celular altamente vari\u00e1vel de paciente para paciente. Olivier Gevaert, professor associado de inform\u00e1tica biom\u00e9dica e ci\u00eancia dos dados, salientou a complexidade do tratamento do glioblastoma, afirmando: \"Devido \u00e0 heterogeneidade desta doen\u00e7a, os cientistas n\u00e3o encontraram boas formas de a combater.\" O modelo de IA visa mitigar este problema, analisando imagens coradas de tecido de glioblastoma para avaliar suas caracter\u00edsticas, incluindo a agressividade do tumor e gen\u00e9tica<\/p>","protected":false},"author":2,"featured_media":4780,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84],"tags":[203,274,204,105,101],"class_list":["post-4779","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-biotech","tag-cancer","tag-healthcare","tag-machine-learning","tag-medtech"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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