{"id":4921,"date":"2021-06-13T02:09:33","date_gmt":"2021-06-13T09:09:33","guid":{"rendered":"https:\/\/fuentesfidedignas.com.mx\/?p=4921"},"modified":"2021-06-13T02:09:35","modified_gmt":"2021-06-13T09:09:35","slug":"cientificos-exploran-cerebro-de-pacientes-con-alzheimer-y-encuentran-algo-inesperado","status":"publish","type":"post","link":"https:\/\/fuentesfidedignas.com.mx\/index.php\/2021\/06\/13\/cientificos-exploran-cerebro-de-pacientes-con-alzheimer-y-encuentran-algo-inesperado\/","title":{"rendered":"Cient\u00edficos exploran cerebro de pacientes con Alzheimer y encuentran algo inesperado"},"content":{"rendered":"\n<p><strong><em>Los investigadores encontraron, de forma inesperada, dep\u00f3sitos de cobre y hierro elementales en el cerebro de dos personas fallecidas<\/em><\/strong><\/p>\n\n\n\n<p>Un nuevo estudio ha identificado inesperadamente diminutos dep\u00f3sitos de cobre y hierro elementales en el cerebro de dos personas fallecidas con la enfermedad de Alzheimer, seg\u00fan publican los investigadores en la revista &#8216;Science Advances&#8217;.<\/p>\n\n\n\n<p>Estos hallazgos podr\u00edan ayudar a los cient\u00edficos a comprender mejor c\u00f3mo estos metales elementales, descubiertos en el n\u00facleo de las placas amiloides, contribuyen a las enfermedades neurodegenerativas y podr\u00edan apuntar a un objetivo para terapias alternativas contra el Alzheimer.<\/p>\n\n\n\n<p>Aunque se sabe que las enzimas y las prote\u00ednas que contienen iones de cobre y hierro con carga positiva controlan procesos clave en el cerebro humano, se sabe poco sobre c\u00f3mo el \u00f3rgano mineraliza el hierro y el cobre, incluida la formaci\u00f3n de nanopart\u00edculas met\u00e1licas elementales, que son m\u00e1s reactivas que los \u00f3xidos de los que surgen.<\/p>\n\n\n\n<p>Para determinar la distribuci\u00f3n y el estado qu\u00edmico del cobre y el hierro dentro de las muestras de placas amiloides humanas, Los investigadores examinaron n\u00facleos de placas amiloides tomados de la materia gris de los l\u00f3bulos frontal y temporal de los cerebros de dos pacientes de Alzheimer fallecidos, utilizando un microscopio de rayos X de transmisi\u00f3n de barrido (STXM) basado en el sincrotr\u00f3n.<\/p>\n\n\n\n<p>Identificaron hierro y cobre en diferentes estados qu\u00edmicamente reducidos dentro de una misma placa, incluyendo varias formas ionizadas y elementales, lo que sugiere que pueden producirse repetidas reacciones de reducci\u00f3n y oxidaci\u00f3n dentro de estos reveladores c\u00famulos de prote\u00ednas mal plegadas.<\/p>\n\n\n\n<p>La inesperada identificaci\u00f3n de Cu0 y Fe0 dentro de las placas amiloides de la enfermedad de Alzheimer sugiere que los elementos met\u00e1licos biog\u00e9nicos, previamente observados s\u00f3lo en microorganismos, virus y plantas, tambi\u00e9n pueden aparecer en los seres humanos&#8221;, escriben los autores.<\/p>\n\n\n\n<p>Y a\u00f1aden que &#8220;la reactividad de estas fases met\u00e1licas difiere de sus hom\u00f3logos de \u00f3xido met\u00e1lico detectados anteriormente en el cerebro humano y tiene el alcance de redefinir nuestra comprensi\u00f3n de la neuroqu\u00edmica de los metales y el papel de la toxicidad de los metales en las enfermedades neurodegenerativas&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Los investigadores encontraron, de forma inesperada, dep\u00f3sitos de cobre y hierro elementales en el cerebro de dos personas fallecidas Un nuevo estudio ha identificado inesperadamente diminutos dep\u00f3sitos de cobre y hierro elementales en el cerebro de dos personas fallecidas con la enfermedad de Alzheimer, seg\u00fan publican los investigadores en la revista &#8216;Science Advances&#8217;. Estos hallazgos [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":4922,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[40],"tags":[],"class_list":{"0":"post-4921","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-las-asombrosas"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cient\u00edficos exploran cerebro de pacientes con Alzheimer y encuentran algo inesperado - Fuentes Fidedignas<\/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:\/\/fuentesfidedignas.com.mx\/index.php\/2021\/06\/13\/cientificos-exploran-cerebro-de-pacientes-con-alzheimer-y-encuentran-algo-inesperado\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cient\u00edficos exploran cerebro de pacientes con Alzheimer y encuentran algo inesperado - Fuentes Fidedignas\" \/>\n<meta property=\"og:description\" content=\"Los investigadores encontraron, de forma inesperada, dep\u00f3sitos de cobre y hierro elementales en el cerebro de dos personas fallecidas Un nuevo estudio ha identificado inesperadamente diminutos dep\u00f3sitos de cobre y hierro elementales en el cerebro de dos personas fallecidas con la enfermedad de Alzheimer, seg\u00fan publican los investigadores en la revista &#8216;Science Advances&#8217;. 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