{"id":5306,"date":"2018-11-21T17:29:10","date_gmt":"2018-11-21T20:29:10","guid":{"rendered":"https:\/\/biologo.com.br\/bio\/?p=5306"},"modified":"2023-03-20T01:43:20","modified_gmt":"2023-03-20T04:43:20","slug":"novas-descobertas-sobre-a-doenca-de-alzheimer","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/novas-descobertas-sobre-a-doenca-de-alzheimer\/","title":{"rendered":"Novas descobertas sobre a doen\u00e7a de Alzheimer"},"content":{"rendered":"<p><span style=\"color: #000000; font-size: 14pt;\"><span style=\"color: #3366ff;\"><strong>Novas descobertas sobre a doen\u00e7a de Alzheimer:<\/strong><\/span> A dificuldade de encontrar as chaves do carro, distraidamente guardadas na gaveta de meias em vez do habitual porta-chaves. <\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt;\">Ou o terror de n\u00e3o lembrar o caminho de casa ap\u00f3s uma corrida pelo bairro, como o vivido pela professora universit\u00e1ria no filme <span style=\"text-decoration: underline;\"><a style=\"color: #000000; text-decoration: underline;\" href=\"http:\/\/www.adorocinema.com\/filmes\/filme-226823\/\" target=\"_blank\" rel=\"noopener\">Para sempre Alice<\/a><\/span>,&nbsp;de 2014, podem n\u00e3o ser os primeiros sinais da&nbsp;doen\u00e7a de Alzheimer.<\/span><\/p>\n<h2><span style=\"font-family: 'courier new', courier, monospace; font-size: 24pt; color: #000000;\"><strong>Novas descobertas sobre<br \/>\na doen\u00e7a de Alzheimer<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\"><span style=\"font-size: 18pt; font-family: georgia, palatino, serif;\"><span style=\"font-size: 10pt;\">por <strong>Ricardo Zorzetto<span style=\"font-size: 8pt;\">\/<span style=\"text-decoration: underline;\"><a style=\"color: #000000; text-decoration: underline;\" href=\"http:\/\/revistapesquisa.fapesp.br\" target=\"_blank\" rel=\"noopener\">Pesquisa FAPESP <\/a><\/span><\/span>::<\/strong><\/span>&nbsp;<strong>D<\/strong><\/span>escrita h\u00e1 pouco mais de um s\u00e9culo pelo psiquiatra e neuroanatomista alem\u00e3o Alois Alzheimer e, quase simultaneamente,&nbsp;<\/span><span style=\"color: #000000;\">pelo tamb\u00e9m psiquiatra e neuroanatomista checo Oskar Fischer, essa enfermidade que elimina progressivamente as c\u00e9lulas cerebrais tornou-se conhecida por apagar a mem\u00f3ria e reduzir a capacidade de planejar e realizar as tarefas do dia&nbsp;a dia, como fazer a lista do mercado.<\/span><\/p>\n<figure id=\"attachment_2169\" aria-describedby=\"caption-attachment-2169\" style=\"width: 150px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/o-cerebro\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2169\" data-permalink=\"https:\/\/biologo.com.br\/bio\/o-cerebro\/o-cerebro-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/O-C%C3%A9rebro.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"O-C\u00e9rebro\" data-image-description=\"&lt;p&gt;Sinapse no C\u00e9rebro. By Allan Ajifo [CC BY 2.0 (http:\/\/creativecommons.org\/licenses\/by\/2.0)], via Wikimedia Commons&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;O C\u00e9rebro&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/O-C%C3%A9rebro.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-2169 size-thumbnail\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/O-C%C3%A9rebro.jpg?resize=150%2C150&#038;ssl=1\" alt=\"O C\u00e9rebro. \" width=\"150\" height=\"150\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/O-C%C3%A9rebro.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/O-C%C3%A9rebro.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/O-C%C3%A9rebro.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a><figcaption id=\"caption-attachment-2169\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/o-cerebro\/\">O C\u00e9rebro<\/a><span style=\"color: #000000; font-size: 8pt;\">.&nbsp;Novas descobertas sobre a doen\u00e7a de Alzheimer<\/span><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Esses sinais, no entanto, s\u00e3o t\u00edpicos dos est\u00e1gios avan\u00e7ados da doen\u00e7a. Muito antes, ela pode se manifestar de modo dissimulado, fazendo-se confundir com problemas mais comuns na popula\u00e7\u00e3o, como a depress\u00e3o, a ansiedade ou altera\u00e7\u00f5es s\u00fabitas no padr\u00e3o de sono e apetite.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/conheca-a-biomedicina\/\">Conhe\u00e7a a Biomedicina<\/a><\/span><\/li>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/biologia-do-desenvolvimento\/\">Biologia do desenvolvimento<\/a><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">H\u00e1 algum tempo se sabe que esses dist\u00farbios psiqui\u00e1tricos s\u00e3o mais frequentes nas pessoas que desenvolvem Alzheimer ao envelhecer do que na&nbsp;popula\u00e7\u00e3o idosa saud\u00e1vel.<\/span><\/p>\n<p><span style=\"color: #000000;\">Parte dos neurologistas e especialistas em sa\u00fade mental defende, com base em estudos populacionais, que a depress\u00e3o e a ansiedade surgiriam primeiro, em decorr\u00eancia de isolamento e outras dificuldades impostas pelo envelhecimento, e, se n\u00e3o tratadas, aumentariam o risco de Alzheimer.<\/span><\/p>\n<h3><span style=\"font-size: 12pt;\"><strong><span style=\"color: #000000; font-family: 'courier new', courier, monospace;\">Problemas psiqui\u00e1tricos podem representar primeiros sinais do mal de Alzheimer<\/span><\/strong><\/span><\/h3>\n<p><a href=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/A-Doen%C3%A7a-De-Alzheimer.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"5308\" data-permalink=\"https:\/\/biologo.com.br\/bio\/novas-descobertas-sobre-a-doenca-de-alzheimer\/a-doenca-de-alzheimer\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/A-Doen%C3%A7a-De-Alzheimer.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"A-Doen\u00e7a-De-Alzheimer\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;A Doen\u00e7a De Alzheimer Dem\u00eancia&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/A-Doen%C3%A7a-De-Alzheimer.jpg?fit=631%2C351&amp;ssl=1\" class=\" wp-image-5308 alignleft\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/A-Doen%C3%A7a-De-Alzheimer.jpg?resize=170%2C84&#038;ssl=1\" alt=\"Novas descobertas sobre a doen\u00e7a de Alzheimer\" width=\"170\" height=\"84\"><\/a><\/p>\n<p><span style=\"color: #000000;\">Come\u00e7am agora a surgir evid\u00eancias de que, ao menos em parte dos casos, o oposto pode acontecer: as manifesta\u00e7\u00f5es psiqui\u00e1tricas surgiriam em consequ\u00eancia de danos neurol\u00f3gicos dos est\u00e1gios iniciais do Alzheimer.<\/span><\/p>\n<p><span style=\"color: #000000;\">Indica\u00e7\u00f5es s\u00f3lidas de que os problemas psiqui\u00e1tricos precederiam a perda de mem\u00f3ria e a dem\u00eancia, que se manifestam de duas a tr\u00eas d\u00e9cadas depois das primeiras les\u00f5es neurol\u00f3gicas do Alzheimer, v\u00eam de um trabalho conduzido pela neuropatologista&nbsp;<\/span><span style=\"color: #000000;\">brasileira Lea Tenenholz Grinberg.<\/span><\/p>\n<p><span style=\"color: #000000;\">Professora da Universidade de S\u00e3o Paulo (USP)&nbsp;<\/span><span style=\"color: #000000;\">e da Universidade da Calif\u00f3rnia em S\u00e3o Francisco&nbsp;<\/span><span style=\"color: #000000;\">(UCSF), Estados Unidos, Lea e colaboradores&nbsp;<\/span><span style=\"color: #000000;\">brasileiros e norte-americanos observaram que,&nbsp;<\/span><span style=\"color: #000000;\">ap\u00f3s surgirem as primeiras les\u00f5es, aumenta o risco&nbsp;<\/span><span style=\"color: #000000;\">de problemas psiqui\u00e1tricos.<\/span><\/p>\n<p><span style=\"color: #000000;\"> A probabilidade de&nbsp;<\/span><span style=\"color: #000000;\">desenvolver ansiedade e altera\u00e7\u00f5es (aumento ou&nbsp;<\/span><span style=\"color: #000000;\">diminui\u00e7\u00e3o) de apetite e sono \u00e9 tr\u00eas vezes mais&nbsp;<\/span><span style=\"color: #000000;\">alta em quem tem as les\u00f5es iniciais do que nas&nbsp;<\/span><span style=\"color: #000000;\">pessoas sem elas. Tamb\u00e9m o risco de depress\u00e3o \u00e9&nbsp;<\/span><span style=\"color: #000000;\">quase quatro vezes mais elevado e o de agita\u00e7\u00e3o&nbsp;<\/span><span style=\"color: #000000;\">seis vezes maior.<\/span><\/p>\n<h4><strong><span style=\"font-size: 12pt;\">A pesquisa<span style=\"color: #999999;\"> &#8211;&nbsp;Novas descobertas sobre a doen\u00e7a de Alzheimer<\/span><\/span><\/strong><\/h4>\n<blockquote><p><span style=\"font-size: 14pt; color: #ffffff;\">\u201cEsses resultados indicam que,&nbsp;em parte desses casos, a doen\u00e7a de Alzheimer j\u00e1&nbsp;est\u00e1 instalada em \u00e1reas que modulam a atividade&nbsp;cerebral quando as primeiras manifesta\u00e7\u00f5es&nbsp;psiqui\u00e1tricas surgem\u201d, afirma Lea.<\/span><\/p><\/blockquote>\n<figure id=\"attachment_5309\" aria-describedby=\"caption-attachment-5309\" style=\"width: 631px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/c%C3%B3rtex-cerebral-Alzheimer..jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"5309\" data-permalink=\"https:\/\/biologo.com.br\/bio\/novas-descobertas-sobre-a-doenca-de-alzheimer\/cortex-cerebral-alzheimer\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/c%C3%B3rtex-cerebral-Alzheimer..jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"c\u00f3rtex-cerebral-Alzheimer.\" data-image-description=\"&lt;p&gt;Imagem histopatol\u00f3gica de placas senis vistas no c\u00f3rtex cerebral em um paciente com in\u00edcio da doen\u00e7a de Alzheimer.&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Imagem histopatol\u00f3gica de placas senis vistas no c\u00f3rtex cerebral em um paciente com in\u00edcio da doen\u00e7a de Alzheimer.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/c%C3%B3rtex-cerebral-Alzheimer..jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-5309 size-full\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/c%C3%B3rtex-cerebral-Alzheimer..jpg?resize=631%2C351&#038;ssl=1\" alt=\"c\u00f3rtex cerebral em um paciente com in\u00edcio da doen\u00e7a de Alzheimer.\" width=\"631\" height=\"351\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/c%C3%B3rtex-cerebral-Alzheimer..jpg?w=631&amp;ssl=1 631w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/11\/c%C3%B3rtex-cerebral-Alzheimer..jpg?resize=300%2C167&amp;ssl=1 300w\" sizes=\"auto, (max-width: 631px) 100vw, 631px\" \/><\/a><figcaption id=\"caption-attachment-5309\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #000000;\">Imagem histopatol\u00f3gica de placas senis vistas no c\u00f3rtex cerebral em um paciente com in\u00edcio da doen\u00e7a de Alzheimer.<\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Os pesquisadores chegaram a essa conclus\u00e3o&nbsp;<\/span><span style=\"color: #000000;\">ao analisar o c\u00e9rebro de 455 pessoas&nbsp;<\/span><span style=\"color: #000000;\">com idade entre 58 e 82 anos armazenados&nbsp;<\/span><span style=\"color: #000000;\">no Biobanco para Estudos do Envelhecimento,&nbsp;<\/span><span style=\"color: #000000;\">da USP, um dos maiores acervos de c\u00e9rebro do&nbsp;<\/span><span style=\"color: #000000;\">mundo.<\/span><\/p>\n<p><span style=\"color: #000000;\"> Ali est\u00e3o 3 mil exemplares, doados por&nbsp;<\/span><span style=\"color: #000000;\">familiares de pessoas que passaram por autopsia&nbsp;<\/span><span style=\"color: #000000;\">no Servi\u00e7o de Verifica\u00e7\u00e3o de \u00d3bitos da Capital, em&nbsp;<\/span><span style=\"color: #000000;\">S\u00e3o Paulo. Na realidade, os autores do estudo n\u00e3o&nbsp;<\/span><span style=\"color: #000000;\">analisaram s\u00f3 o c\u00e9rebro. <\/span><\/p>\n<p><span style=\"color: #000000;\">Inspecionaram tamb\u00e9m&nbsp;<\/span><span style=\"color: #000000;\">o tronco encef\u00e1lico, que, com o cerebelo e o c\u00e9rebro,&nbsp;<\/span><span style=\"color: #000000;\">comp\u00f5e o enc\u00e9falo, conjunto de estruturas&nbsp;<\/span><span style=\"color: #000000;\">abrigadas no cr\u00e2nio. Em 2009, Lea e as equipes do&nbsp;<\/span><span style=\"color: #000000;\">neuroanatomista alem\u00e3o Helmut Heinsen, \u00e0 \u00e9poca&nbsp;<\/span><span style=\"color: #000000;\">na Universidade de W\u00fcrzburg, Alemanha, e do&nbsp;<\/span><span style=\"color: #000000;\">neurologista Ricardo Nitrini e do geriatra Wilson&nbsp;<\/span><span style=\"color: #000000;\">Jacob Filho, ambos da USP, haviam confirmado&nbsp;<\/span><span style=\"color: #000000;\">que uma das primeiras estruturas danificadas na&nbsp;<\/span><span style=\"color: #000000;\">doen\u00e7a de Alzheimer estava no tronco encef\u00e1lico,&nbsp;<\/span><span style=\"color: #000000;\">e n\u00e3o no c\u00e9rebro.<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-size: 10pt;\">&gt;&gt; Para saber mais, leia o artigo completo no site da Revista Fapesp<\/span> <span style=\"font-size: 10pt;\">&#8211;&nbsp; <span style=\"text-decoration: underline; color: #000000;\"><a class=\"gs-title\" dir=\"ltr\" style=\"color: #000000; text-decoration: underline;\" href=\"http:\/\/revistapesquisa.fapesp.br\/2018\/11\/19\/avanco-no-estudo-sobre-alzheimer\/\" target=\"_blank\" rel=\"noopener\" data-cturl=\"https:\/\/www.google.com\/url?q=http:\/\/revistapesquisa.fapesp.br\/2018\/11\/19\/avanco-no-estudo-sobre-alzheimer\/&amp;sa=U&amp;ved=0ahUKEwio_JKZq-beAhVEQpAKHTUOBmUQFggFMAA&amp;client=internal-uds-cse&amp;cx=001765240397362692857:5v4l9pfilme&amp;usg=AOvVaw2I_AWbyFstNnakpjj3SDfQ\" data-ctorig=\"http:\/\/revistapesquisa.fapesp.br\/2018\/11\/19\/avanco-no-estudo-sobre-alzheimer\/\">Avan\u00e7o no estudo sobre&nbsp;<b>Alzheimer<\/b><\/a><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Novas descobertas sobre a doen\u00e7a de Alzheimer: A dificuldade de encontrar as chaves do carro, distraidamente guardadas na gaveta de<\/p>\n","protected":false},"author":1,"featured_media":5308,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[17,43],"tags":[],"class_list":["post-5306","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biomedicas","category-neurobiologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Novas descobertas sobre a doen\u00e7a de Alzheimer - Neurobiologia - Bi\u00f3logo<\/title>\n<meta name=\"description\" content=\"Novas descobertas sobre a doen\u00e7a de Alzheimer: Problemas psiqui\u00e1tricos podem representar os primeiros sinais da doen\u00e7a de Alzheimer. 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