{"id":8732,"date":"2026-08-25T10:51:34","date_gmt":"2026-08-25T14:51:34","guid":{"rendered":"https:\/\/elglobal.do\/?p=8732"},"modified":"2026-08-25T10:51:36","modified_gmt":"2026-08-25T14:51:36","slug":"la-fda-autoriza-nueva-prueba-de-sangre-para-detectar-indicios-de-alzheimer","status":"publish","type":"post","link":"https:\/\/elglobal.do\/index.php\/2026\/08\/25\/la-fda-autoriza-nueva-prueba-de-sangre-para-detectar-indicios-de-alzheimer\/","title":{"rendered":"La FDA autoriza nueva prueba de sangre para detectar indicios de alzh\u00e9imer"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"895\" height=\"504\" src=\"https:\/\/elglobal.do\/wp-content\/uploads\/2026\/08\/image-215.png\" alt=\"\" class=\"wp-image-8733\" style=\"aspect-ratio:1.775839857298583;width:419px;height:auto\" srcset=\"https:\/\/elglobal.do\/wp-content\/uploads\/2026\/08\/image-215.png 895w, https:\/\/elglobal.do\/wp-content\/uploads\/2026\/08\/image-215-300x169.png 300w, https:\/\/elglobal.do\/wp-content\/uploads\/2026\/08\/image-215-767x432.png 767w\" sizes=\"auto, (max-width: 895px) 100vw, 895px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><strong>Estados Unidos.-<\/strong> La\u00a0<strong>Administraci\u00f3n de Alimentos y Medicamentos<\/strong>\u00a0de\u00a0<strong>Estados Unidos<\/strong>\u00a0(<strong>FDA<\/strong>) autoriz\u00f3 una nueva\u00a0<strong>prueba<\/strong>\u00a0de sangre desarrollada por\u00a0<strong>Roche<\/strong>\u00a0en colaboraci\u00f3n con\u00a0<strong>Eli Lilly<\/strong>\u00a0que permite identificar indicios biol\u00f3gicos asociados con la enfermedad de\u00a0<strong>alzh\u00e9imer<\/strong>\u00a0en personas de 55 a\u00f1os o m\u00e1s que presentan se\u00f1ales de deterioro cognitivo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La&nbsp;<strong>prueba<\/strong>, denominada<em>&nbsp;<strong>Elecsys pTau217<\/strong><\/em>, busca hacer m\u00e1s accesible la evaluaci\u00f3n de pacientes con problemas de memoria u otras manifestaciones cognitivas, al ofrecer una alternativa menos invasiva que procedimientos utilizados actualmente, como las&nbsp;<strong>tomograf\u00edas por emisi\u00f3n de positrones<\/strong>&nbsp;(<strong>PET<\/strong>) o el an\u00e1lisis del&nbsp;<strong>l\u00edquido cefalorraqu\u00eddeo<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Roche<\/strong>\u00a0advierte expresamente que\u00a0<strong>Elecsys pTau217<\/strong>\u00a0debe utilizarse junto con la\u00a0<strong>historia cl\u00ednica<\/strong>, la evaluaci\u00f3n m\u00e9dica y, cuando corresponda,\u00a0<strong>otras pruebas diagn\u00f3sticas<\/strong>. Tampoco est\u00e1 autorizada para predecir si una persona desarrollar\u00e1 demencia en el futuro ni para determinar si un tratamiento contra el\u00a0<strong>alzh\u00e9imer<\/strong>\u00a0est\u00e1 funcionando.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfQu\u00e9 busca en la sangre?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La&nbsp;<strong>prueba<\/strong>&nbsp;mide la<em>&nbsp;<strong><\/strong><\/em><strong>prote\u00edna<\/strong><em><strong>&nbsp;tau fosforilada 217<\/strong><\/em>, conocida como&nbsp;<strong>pTau217<\/strong>, un&nbsp;<strong>biomarcador<\/strong>&nbsp;relacionado con la acumulaci\u00f3n de&nbsp;<strong>placas de beta amiloide<\/strong>&nbsp;en el cerebro, una de las alteraciones caracter\u00edsticas de la enfermedad de&nbsp;<strong>alzh\u00e9imer<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El examen clasifica los resultados en tres categor\u00edas:&nbsp;<strong>positivo<\/strong>,&nbsp;<strong>intermedio<\/strong>&nbsp;o&nbsp;<strong>negativo<\/strong>. Esto permite estimar si existe una probabilidad alta o baja de que el paciente presente&nbsp;<strong>patolog\u00eda amiloide<\/strong>&nbsp;y ayuda al m\u00e9dico a decidir si debe solicitar pruebas adicionales.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La importancia radica en que hasta ahora confirmar este tipo de cambios cerebrales puede requerir un&nbsp;<strong>PET<\/strong>, una&nbsp;<strong>prueba<\/strong>&nbsp;de im\u00e1genes especializada y costosa, o una&nbsp;<strong>punci\u00f3n lumbar<\/strong>&nbsp;para obtener&nbsp;<strong>l\u00edquido cefalorraqu\u00eddeo<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una&nbsp;<strong>extracci\u00f3n ordinaria de sangre<\/strong>&nbsp;podr\u00eda convertirse as\u00ed en un&nbsp;<strong>primer filtro<\/strong>&nbsp;para seleccionar a los pacientes que realmente necesitan procedimientos m\u00e1s complejos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00ab<strong><em>Elecsys pTau217<\/em><\/strong>\u00a0no est\u00e1 destinada a utilizarse como una\u00a0<strong>prueba<\/strong>\u00a0diagn\u00f3stica independiente\u00bb, precis\u00f3\u00a0<strong>Roche<\/strong>\u00a0al anunciar la autorizaci\u00f3n estadounidense.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Autorizaci\u00f3n en Europa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La&nbsp;<strong>FDA<\/strong>&nbsp;dio luz verde al examen despu\u00e9s de que recibiera en mayo de este a\u00f1o la&nbsp;<strong>certificaci\u00f3n europea<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Roche<\/strong>&nbsp;asegura que el an\u00e1lisis ha mostrado una elevada concordancia con las pruebas&nbsp;<strong>PET<\/strong>&nbsp;utilizadas para identificar la acumulaci\u00f3n de amiloide en el cerebro. Un&nbsp;<strong>estudio publicado en 2026<\/strong>&nbsp;que evalu\u00f3 el ensayo en m\u00e1s de 2,100 personas encontr\u00f3 una fuerte capacidad para diferenciar entre individuos con y sin&nbsp;<strong>patolog\u00eda amiloide<\/strong>, aunque su desempe\u00f1o depende del punto de corte y de las caracter\u00edsticas de los pacientes evaluados.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La autorizaci\u00f3n adquiere especial importancia por la posibilidad de extender r\u00e1pidamente su uso. El examen puede procesarse en m\u00e1s de&nbsp;<strong>4,500 analizadores de laboratorio cobas<\/strong>&nbsp;de&nbsp;<strong>Roche<\/strong>&nbsp;que ya est\u00e1n instalados en&nbsp;<strong>Estados Unidos<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Las redes de laboratorios\u00a0<strong>Labcorp<\/strong>\u00a0y\u00a0<strong>Quest Diagnostics<\/strong>\u00a0anunciaron que prev\u00e9n ofrecer la\u00a0<strong>prueba<\/strong>, lo que podr\u00eda ampliar considerablemente su disponibilidad.\u00a0<strong>Roche<\/strong>\u00a0todav\u00eda no ha divulgado cu\u00e1nto costar\u00e1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Estados Unidos.- La\u00a0Administraci\u00f3n de Alimentos y Medicamentos\u00a0de\u00a0Estados Unidos\u00a0(FDA) autoriz\u00f3 una nueva\u00a0prueba\u00a0de sangre desarrollada por\u00a0Roche\u00a0en colaboraci\u00f3n con\u00a0Eli Lilly\u00a0que permite identificar indicios biol\u00f3gicos asociados con la enfermedad de\u00a0alzh\u00e9imer\u00a0en personas de 55 a\u00f1os&hellip; <\/p>\n","protected":false},"author":1,"featured_media":8733,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[14,181],"tags":[4807,4532,4806,61],"class_list":["post-8732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-slider","category-salud","tag-alzheimer-2","tag-fda","tag-pruebadesangre","tag-salud"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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