{"id":24265,"date":"2025-11-22T10:59:27","date_gmt":"2025-11-22T13:59:27","guid":{"rendered":"https:\/\/oficialnoticias.com\/?p=24265"},"modified":"2025-11-22T10:59:28","modified_gmt":"2025-11-22T13:59:28","slug":"estudos-apontam-que-colesterol-tem-papel-decisivo-na-saude-do-cerebro","status":"publish","type":"post","link":"https:\/\/oficialnoticias.com\/?p=24265","title":{"rendered":"Estudos apontam que colesterol tem papel decisivo na sa\u00fade do c\u00e9rebro"},"content":{"rendered":"<p><\/p>\n<div>\n<p>Estudos recentes revelam o papel do colesterol tanto para manter a sa\u00fade do \u00f3rg\u00e3o como para acelerar o decl\u00ednio do c\u00e9rebro. E a composi\u00e7\u00e3o da gordura tem tudo a ver com esses efeitos diferentes. <\/p>\n<p>\u00c9 prov\u00e1vel que voc\u00ea j\u00e1 tenha ouvido falar que existe o colesterol considerado bom (HDL) e o ruim (n\u00e3o HDL ou LDL). Mas sabia que um dos lugares do corpo onde essa dicotomia fica mais evidente \u00e9 no c\u00e9rebro? <\/p>\n<p>Por muito tempo, o papel do colesterol no c\u00e9rebro foi visto apenas como vil\u00e3o, especialmente por sua associa\u00e7\u00e3o com acidentes vasculares no \u00f3rg\u00e3o. Contudo, ao longo da \u00faltima d\u00e9cada, pesquisas revelaram que o c\u00e9rebro depende dele para funcionar bem.<\/p>\n<p>O \u00f3rg\u00e3o \u00e9 composto por cerca de 60% de gordura e precisa de lip\u00eddios para manter a estrutura das c\u00e9lulas nervosas e a transmiss\u00e3o de sinais el\u00e9tricos. Isso, no entanto, n\u00e3o quer dizer qualquer gordura.<\/p>\n<p>\u201c\u00c9 uma divis\u00e3o complexa e depende da qualidade desse colesterol\u201d, explicou o neurologista Marco T\u00falio Pedatella, coordenador de Neurologia do Einstein Hospital Israelita em Goi\u00e2nia. <\/p>\n<p>\u201cN\u00e3o \u00e9 s\u00f3 pensar em n\u00edveis gerais, at\u00e9 a propor\u00e7\u00e3o de prote\u00ednas associadas ao colesterol HDL tem impactos nos efeitos que ele trar\u00e1 ao c\u00e9rebro\u201d, continuou.<\/p>\n<p>O equil\u00edbrio, portanto, \u00e9 delicado. Se por um lado as gorduras boas s\u00e3o essenciais para a forma\u00e7\u00e3o e manuten\u00e7\u00e3o das fun\u00e7\u00f5es dos neur\u00f4nios, de outro ponto de vista, o excesso de lip\u00eddios, especialmente dos tipos LDL que se acumulam em forma de got\u00edculas no \u00f3rg\u00e3o, est\u00e1 relacionado \u00e0 inflama\u00e7\u00e3o e ao decl\u00ednio cognitivo.<\/p>\n<p><bsp-list-loadmore class=\"PageListStandardG\" data-module=\"\" data-show-loadmore=\"true\" data-list-title-size=\"3\" data-list-description-size=\"3\"><\/p>\n<p>    <a class=\"AnchorLink\" title=\"leia-tambem\" name=\"leia-tambem\"\/><\/p>\n<p><\/bsp-list-loadmore><\/p>\n<h2><b>Quando o colesterol protege ou prejudica<\/b><\/h2>\n<p>Diversos estudos t\u00eam sido conduzidos para entender os impactos desse papel distinto do colesterol no c\u00e9rebro. Um deles, feito por pesquisadores da Universidade do Texas, nos Estados Unidos, e publicado no <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.mdpi.com\/2077-0383\/13\/20\/6218\" target=\"_blank\" title=\"&lt;i&gt;&lt;u&gt;Journal of Clinical Medicine&lt;\/u&gt;&lt;\/i&gt;\" rel=\"noopener\"><i><u>Journal of Clinical Medicine<\/u><\/i><\/a><\/span><\/bsp-link-enhancement> em outubro de 2024, revelou que o HDL pode at\u00e9 ter um efeito neuroprotetor.<\/p>\n<p>Exames de imagem feitos em 1.800 adultos mostram que aqueles com n\u00edveis mais altos de HDL tinham, em m\u00e9dia, maior volume de mat\u00e9ria cinzenta no c\u00e9rebro, o que pode ser associado a uma melhor preserva\u00e7\u00e3o da cogni\u00e7\u00e3o com o envelhecimento. Essa associa\u00e7\u00e3o ben\u00e9fica se manteve at\u00e9 em pacientes que tinham o gene ApoE4, ligado ao Alzheimer.<\/p>\n<p>Outra pesquisa, divulgada na revista <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.cell.com\/immunity\/abstract\/S1074-7613(25)00192-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS107476132500192X%3Fshowall%3Dtrue\" target=\"_blank\" title=\"&lt;i&gt;&lt;u&gt;Immunity&lt;\/u&gt;&lt;\/i&gt;\" rel=\"noopener\"><i><u>Immunity<\/u><\/i><\/a><\/span><\/bsp-link-enhancement> em julho de 2025, se dedicou ao colesterol \u201cruim\u201d, o LDL. A pesquisa revelou que ter n\u00edveis altos desse tipo de gordura entre 40 e 65 anos de idade aumenta significativamente o risco de Alzheimer e outras formas de dem\u00eancia nas d\u00e9cadas seguintes. Segundo a investiga\u00e7\u00e3o de neurocientistas da Universidade de Purdue, tamb\u00e9m nos EUA, o excesso de gordura pode paralisar as microglias, c\u00e9lulas de defesa cerebrais.<\/p>\n<p>Eles descobriram que uma enzima lip\u00eddica, a DGAT2, se acumula nessas c\u00e9lulas e reduz a capacidade de elas eliminarem as placas amiloides, ac\u00famulos de prote\u00ednas altamente associados ao Alzheimer. O estudo tamb\u00e9m descobriu, em c\u00e9lulas <i>in vitro<\/i>, que ao acabar com as enzimas de gordura, a fun\u00e7\u00e3o celular dessas \u201cfaxineiras\u201d do c\u00e9rebro se recuperou integralmente.<\/p>\n<p>\u201cEsses achados refor\u00e7am a import\u00e2ncia de manter um metabolismo lip\u00eddico equilibrado para preservar a sa\u00fade cerebral ao longo da vida\u201d, ressaltou a cardiologista Fabiana Hanna Rached, especialista em aterosclerose, do Einstein Hospital Israelita. <\/p>\n<p>\u201cO desequil\u00edbrio do colesterol no c\u00e9rebro afeta a comunica\u00e7\u00e3o entre os neur\u00f4nios, prejudica a fun\u00e7\u00e3o sin\u00e1ptica e pode contribuir para o decl\u00ednio cognitivo.\u201d<\/p>\n<p>A boa not\u00edcia \u00e9 que manter o colesterol sob controle &#8211; especialmente o LDL &#8211; pode reduzir o risco de decl\u00ednio cognitivo. Estudos indicam que o uso de estatinas e mudan\u00e7as na dieta ajudam n\u00e3o s\u00f3 a proteger o cora\u00e7\u00e3o, mas tamb\u00e9m a retardar ou at\u00e9 prevenir a dem\u00eancia.<\/p>\n<h2><b>Um colesterol s\u00f3 do c\u00e9rebro<\/b><\/h2>\n<p>Embora o corpo produza colesterol em v\u00e1rios tecidos, o do c\u00e9rebro \u00e9 \u201cparticular\u201d. Ele \u00e9 sintetizado ali e n\u00e3o atravessa livremente a barreira hematoencef\u00e1lica, que isola o sistema nervoso, por isso seus n\u00edveis podem ser diferentes do restante do corpo. \u201cO colesterol cerebral tem metabolismo pr\u00f3prio, e apenas derivados como a 24S-hidroxicolesterol conseguem atravessar essa barreira\u201d, explica Pedatella. Essa separa\u00e7\u00e3o ajuda a proteger o sistema nervoso de varia\u00e7\u00f5es bruscas na gordura circulante.<\/p>\n<p>Apesar disso, dist\u00farbios sist\u00eamicos do corpo associados aos n\u00edveis lip\u00eddicos, como a s\u00edndrome metab\u00f3lica, podem afetar indiretamente o metabolismo de colesterol cerebral. Indiv\u00edduos com obesidade abdominal, hipertens\u00e3o e baixos n\u00edveis de HDL no sangue, por exemplo, costumam apresentar volume cerebral reduzido. <\/p>\n<p>\u201cEmbora as gorduras saud\u00e1veis sejam cruciais para a fun\u00e7\u00e3o cognitiva e sa\u00fade cerebral, ter baixos n\u00edveis de HDL associados a outros problemas metab\u00f3licos j\u00e1 foi at\u00e9 ligado a um desempenho cognitivo menor em testes, ent\u00e3o precisamos investigar mais a fundo se a revers\u00e3o ou melhora da s\u00edndrome metab\u00f3lica pode beneficiar a sa\u00fade cerebral e de que formas\u201d, observou Rached.<\/p>\n<p>Al\u00e9m disso, o momento da vida em que o colesterol se eleva parece determinar o risco futuro de dem\u00eancia. \u201cO impacto dos n\u00edveis de colesterol sobre o risco de dem\u00eancia \u00e9 mais significativo quando a exposi\u00e7\u00e3o ocorre na meia-idade\u201d, alertou o neurologista. <\/p>\n<p>Ap\u00f3s os 70 anos, essa associa\u00e7\u00e3o enfraquece, e n\u00edveis mais altos podem at\u00e9 se relacionar a melhor progn\u00f3stico em alguns estudos. Essas contradi\u00e7\u00f5es indicam que ainda h\u00e1 muito para entender.<\/p>\n<p> \u201cFaltam estudos longitudinais capazes de distinguir causa e efeito do colesterol no c\u00e9rebro. Tamb\u00e9m \u00e9 necess\u00e1rio investigar como interven\u00e7\u00f5es precoces, como dietas equilibradas e controle metab\u00f3lico, podem preservar a fun\u00e7\u00e3o cerebral\u201d, destacou a cardiologista do Einstein.<\/p>\n<p>Enquanto isso, vale seguir a m\u00e1xima: cuidar do colesterol com boa alimenta\u00e7\u00e3o, tratamentos medicamentosos quando necess\u00e1rio e pr\u00e1tica de atividades f\u00edsicas n\u00e3o \u00e9 s\u00f3 quest\u00e3o de cora\u00e7\u00e3o; \u00e9 tamb\u00e9m um investimento na sa\u00fade como um todo, inclusive do c\u00e9rebro.<\/p>\n<p><b><i>Com informa\u00e7\u00f5es de Ag\u00eancia Einstein<\/i><\/b><\/p>\n<\/p><\/div>\n<p><script>\n  window.fbAsyncInit = function() {\n      FB.init({\n              appId : '1447052969554341',\n          xfbml : true,\n          version : 'v2.9'\n      });\n  };\n  (function(d, s, id){\n     var js, fjs = d.getElementsByTagName(s)[0];\n     if (d.getElementById(id)) {return;}\n     js = d.createElement(s); js.id = id;\n     js.src = \"https:\/\/connect.facebook.net\/en_US\/sdk.js\";\n     fjs.parentNode.insertBefore(js, fjs);\n   }(document, 'script', 'facebook-jssdk'));\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Estudos recentes revelam o papel do colesterol tanto para manter a sa\u00fade do \u00f3rg\u00e3o como para acelerar o decl\u00ednio do c\u00e9rebro. E a composi\u00e7\u00e3o da gordura tem tudo a ver com esses efeitos diferentes. \u00c9 prov\u00e1vel que voc\u00ea j\u00e1 tenha ouvido falar que existe o colesterol considerado bom (HDL) e o ruim (n\u00e3o HDL ou&#8230;<\/p>\n","protected":false},"author":2,"featured_media":24266,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-24265","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sem-categoria"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Estudos apontam que colesterol tem papel decisivo na sa\u00fade do c\u00e9rebro -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/oficialnoticias.com\/?p=24265\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Estudos apontam que colesterol tem papel decisivo na sa\u00fade do c\u00e9rebro -\" \/>\n<meta property=\"og:description\" content=\"Estudos recentes revelam o papel do colesterol tanto para manter a sa\u00fade do \u00f3rg\u00e3o como para acelerar o decl\u00ednio do c\u00e9rebro. E a composi\u00e7\u00e3o da gordura tem tudo a ver com esses efeitos diferentes. \u00c9 prov\u00e1vel que voc\u00ea j\u00e1 tenha ouvido falar que existe o colesterol considerado bom (HDL) e o ruim (n\u00e3o HDL ou...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/oficialnoticias.com\/?p=24265\" \/>\n<meta property=\"article:published_time\" content=\"2025-11-22T13:59:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-22T13:59:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/oficialnoticias.com\/wp-content\/uploads\/2025\/11\/urlhttps3A2F2Fk2-prod-radio-itatiaia.s3.us-east-1.amazonaws.com2Fbrightspot2F6f2Fde2Fe51572.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Luana Gon\u00e7alves\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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