{"id":6350,"date":"2019-10-25T13:22:07","date_gmt":"2019-10-25T16:22:07","guid":{"rendered":"https:\/\/biologo.com.br\/bio\/?p=6350"},"modified":"2019-10-25T13:22:07","modified_gmt":"2019-10-25T16:22:07","slug":"como-o-zika-afeta-o-cerebro-adulto","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/como-o-zika-afeta-o-cerebro-adulto\/","title":{"rendered":"Como o zika afeta o c\u00e9rebro adulto"},"content":{"rendered":"<p><span style=\"font-size: 14pt; color: #000000;\"><span style=\"color: #3366ff; font-family: 'courier new', courier, monospace;\"><strong>Como o zika afeta o c\u00e9rebro adulto:<\/strong><\/span> Experimento feito em camundongos mostrou que o v\u00edrus pode infectar neur\u00f4nios e causar perda de mem\u00f3ria.<\/span><\/p>\n<h2><span style=\"font-family: 'courier new', courier, monospace; font-size: 24pt; color: #000000;\"><strong>Como o zika afeta o c\u00e9rebro adulto<\/strong><\/span><\/h2>\n<p><span style=\"font-size: 8pt; color: #000000;\">Out\/2019 :: por Carlos Fioravanti \/ Pesquisa FAPESP<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-size: 18pt; font-family: georgia, palatino, serif;\"><strong>O<\/strong><\/span> v\u00edrus zika pode infectar e se reproduzir em tecidos cerebrais de pessoas adultas, produzindo novas part\u00edculas virais capazes de infectar mais c\u00e9lulas nervosas. <\/span><\/p>\n<figure id=\"attachment_581\" aria-describedby=\"caption-attachment-581\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/zika-virus-prejudica-celulas-do-cerebro-fetal-humano\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"581\" data-permalink=\"https:\/\/biologo.com.br\/bio\/zika-virus-prejudica-celulas-do-cerebro-fetal-humano\/zica-sintomas\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/04\/zica-sintomas.jpg?fit=401%2C337&amp;ssl=1\" data-orig-size=\"401,337\" 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=\"zica-sintomas\" data-image-description=\"&lt;p&gt;Principais sintomas da febre Zika&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Principais sintomas da febre Zika&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/04\/zica-sintomas.jpg?fit=401%2C337&amp;ssl=1\" class=\"wp-image-581 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/04\/zica-sintomas.jpg?resize=300%2C252&#038;ssl=1\" alt=\"Principais sintomas da febre Zika\" width=\"300\" height=\"252\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/04\/zica-sintomas.jpg?resize=300%2C252&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2016\/04\/zica-sintomas.jpg?w=401&amp;ssl=1 401w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-581\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #000000;\">Principais sintomas da febre Zika<\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">A conclus\u00e3o resulta de experimentos realizados na Universidade Federal do Rio de Janeiro (UFRJ) com fragmentos de c\u00f3rtex que seriam descartados em cirurgias realizadas no Hospital Universit\u00e1rio. O trabalho, publicado em 5 de setembro na revista <a href=\"https:\/\/www.nature.com\/ncomms\/\" target=\"_blank\" rel=\"noopener noreferrer\">Nature Communications<\/a>, amplia o alcance do v\u00edrus.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/zika-virus-prejudica-celulas-do-cerebro-fetal-humano\/\">Zika v\u00edrus prejudica c\u00e9lulas do c\u00e9rebro fetal humano<\/a><\/span><\/li>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/doencas-transmitidas-por-mosquitos\/\">Doen\u00e7as transmitidas por mosquitos<\/a><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">Em estudos anteriores, o v\u00edrus havia sido detectado apenas em neur\u00f4nios em forma\u00e7\u00e3o ou imaturos, em c\u00e9rebros em desenvolvimento, como o de embri\u00f5es, causando microcefalia e outras malforma\u00e7\u00f5es neurol\u00f3gicas. \u201cVimos que o v\u00edrus pode infectar e se replicar tamb\u00e9m em neur\u00f4nios maduros, de adultos, que pens\u00e1vamos que fossem resistentes \u00e0 infec\u00e7\u00e3o\u201d, diz o bioqu\u00edmico e neurocientista Sergio Teixeira Ferreira, pesquisador da UFRJ e coordenador desse trabalho.<\/span><\/p>\n<blockquote><p><span style=\"color: #ffffff; font-size: 14pt;\">Em consequ\u00eancia, ele acrescenta, \u201ca infec\u00e7\u00e3o pelo v\u00edrus zika n\u00e3o \u00e9 mais um problema apenas para gr\u00e1vidas e fetos, na medida em que pode causar danos relevantes tamb\u00e9m em adultos, que t\u00eam sido pouco acompanhados\u201d.<\/span><\/p><\/blockquote>\n<figure id=\"attachment_3562\" aria-describedby=\"caption-attachment-3562\" style=\"width: 300px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/biologo.com.br\/bio\/mosquitos-aliados-contra-a-dengue\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"3562\" data-permalink=\"https:\/\/biologo.com.br\/bio\/mosquitos-aliados-contra-a-dengue\/mosquitos-aliados-contra-a-dengue-aedes\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/02\/Mosquitos-aliados-contra-a-dengue-aedes.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=\"Mosquitos-aliados-contra-a-dengue-aedes\" data-image-description=\"&lt;p&gt;Mosquitos aliados contra a dengue.  Aedes aegypti&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Mosquitos aliados contra a dengue&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/02\/Mosquitos-aliados-contra-a-dengue-aedes.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-3562 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/02\/Mosquitos-aliados-contra-a-dengue-aedes.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Mosquitos aliados contra a dengue\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/02\/Mosquitos-aliados-contra-a-dengue-aedes.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/02\/Mosquitos-aliados-contra-a-dengue-aedes.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-3562\" class=\"wp-caption-text\"><a href=\"https:\/\/biologo.com.br\/bio\/mosquitos-aliados-contra-a-dengue\/\"><span style=\"font-size: 10pt;\">Mosquitos aliados contra a dengue<\/span><\/a><\/figcaption><\/figure>\n<h3><span style=\"color: #000000;\"><strong><span style=\"font-family: 'courier new', courier, monospace; font-size: 14pt;\">Danos do zika no c\u00e9rebro adulto<\/span><\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">Para examinar as consequ\u00eancias da infec\u00e7\u00e3o pelo zika, a equipe da UFRJ injetou uma solu\u00e7\u00e3o com o v\u00edrus purificado, obtido de um paciente brasileiro, diretamente no c\u00e9rebro de camundongos adultos, comparando os resultados com o grupo controle, formado por animais que n\u00e3o receberam o v\u00edrus. Os animais infectados apresentaram perda de mem\u00f3ria e problemas motores, mesmo depois de o organismo combater a infec\u00e7\u00e3o. As regi\u00f5es do c\u00e9rebro respons\u00e1veis pela aprendizagem, mem\u00f3ria e controle motor foram os principais alvos da replica\u00e7\u00e3o do v\u00edrus.<\/span><\/p>\n<p><span style=\"color: #000000;\">Uma an\u00e1lise mais profunda indicou que o v\u00edrus causou uma inflama\u00e7\u00e3o intensa no c\u00e9rebro de camundongos. Ap\u00f3s detectarem o v\u00edrus, c\u00e9lulas de defesa intensificaram a produ\u00e7\u00e3o de prote\u00ednas conhecidas como fator de necrose tumoral alfa (TNF-\u03b1), que induzem a morte de c\u00e9lulas infectadas ou anormais. O TNF-\u03b1 tamb\u00e9m ativa c\u00e9lulas de defesa residentes do c\u00e9rebro chamadas micr\u00f3glias.<\/span><\/p>\n<p><span style=\"color: #000000; font-size: 10pt;\">&gt;&gt; Para saber mais, leia o artigo completo no site da Revista Fapesp &gt;<\/span><a title=\"Danos do zika no c\u00e9rebro adulto\" href=\"https:\/\/revistapesquisa.fapesp.br\/2019\/09\/05\/danos-do-zika-no-cerebro-adulto\/\">Danos do zika no c\u00e9rebro adulto<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Como o zika afeta o c\u00e9rebro adulto: Experimento feito em camundongos mostrou que o v\u00edrus pode infectar neur\u00f4nios e causar<\/p>\n","protected":false},"author":1,"featured_media":6352,"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_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[17,43,136],"tags":[],"class_list":["post-6350","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biomedicas","category-neurobiologia","category-parasitologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Como o zika afeta o c\u00e9rebro adulto: Biomedicina - Bi\u00f3logo<\/title>\n<meta name=\"description\" content=\"Experimento feito em camundongos mostrou que o v\u00edrus pode infectar neur\u00f4nios e causar perda de mem\u00f3ria. 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