{"id":8173,"date":"2026-11-13T13:22:47","date_gmt":"2026-11-13T18:22:47","guid":{"rendered":"https:\/\/canasanta.ca\/?p=8173"},"modified":"2026-11-13T13:22:47","modified_gmt":"2026-11-13T18:22:47","slug":"higado-proteinas-barrera-hematoencefalica-alzheimer","status":"publish","type":"post","link":"https:\/\/canasanta.ca\/en\/salud\/higado-proteinas-barrera-hematoencefalica-alzheimer\/","title":{"rendered":"EL H\u00cdGADO PODR\u00cdA OCULTAR UNA CLAVE DEL ALZH\u00c9IMER"},"content":{"rendered":"

Una investigaci\u00f3n publicada en la revista Cell<\/em> identifica un mecanismo que podr\u00eda ayudar a explicar las primeras alteraciones del alzh\u00e9imer. Los experimentos, realizados en ratones, apuntan a una relaci\u00f3n entre las prote\u00ednas producidas en el h\u00edgado y la conservaci\u00f3n de las conexiones neuronales.<\/strong><\/p>\n

Durante d\u00e9cadas, la barrera hematoencef\u00e1lica se ha estudiado como una de las principales defensas del cerebro. Su capacidad para controlar el intercambio de sustancias con la sangre impide que numerosos compuestos potencialmente perjudiciales alcancen el tejido nervioso. Sin embargo, esa protecci\u00f3n tiene una segunda dimensi\u00f3n que podr\u00eda resultar fundamental para entender algunas enfermedades neurodegenerativas.<\/p>\n

Un equipo de los Institutos Gladstone<\/strong>, dirigido por el investigador Andrew Yang<\/strong>, ha identificado un sistema de transporte selectivo que permite al cerebro recibir determinados componentes procedentes de otros \u00f3rganos. El trabajo, publicado el 11 de noviembre, plantea nuevas preguntas sobre lo que ocurre cuando ese suministro empieza a deteriorarse.<\/p>\n

UNA FRONTERA QUE TAMBI\u00c9N ALIMENTA<\/h2>\n

La barrera hematoencef\u00e1lica est\u00e1 formada por estructuras especializadas de los vasos sangu\u00edneos cerebrales. No funciona como una simple pared: sus c\u00e9lulas regulan la entrada y salida de numerosas sustancias, de acuerdo con las necesidades del tejido nervioso.<\/p>\n

Para estudiar esta actividad, los cient\u00edficos utilizaron un m\u00e9todo de marcaje molecular que les permiti\u00f3 rastrear centenares de prote\u00ednas en animales de laboratorio. De 861 prote\u00ednas analizadas, identificaron 92 que alcanzaban el tejido cerebral. La investigaci\u00f3n muestra que algunos de estos compuestos pueden dirigirse a poblaciones celulares concretas.<\/p>\n

Entre los componentes identificados destaca la apolipoprote\u00edna A1, conocida como APOA1. Esta prote\u00edna participa en el transporte de l\u00edpidos y se produce, entre otros lugares, en el h\u00edgado. Los investigadores observaron que su llegada al cerebro activa mecanismos relacionados con el funcionamiento de los astrocitos.<\/p>\n

EL H\u00cdGADO Y LAS CONEXIONES NEURONALES<\/h2>\n
\"Cient\u00edfica
Imagen ilustrativa de investigaci\u00f3n biom\u00e9dica. National Cancer Institute \/ Unsplash.<\/figcaption><\/figure>\n

Los astrocitos son c\u00e9lulas esenciales del sistema nervioso. Participan en la regulaci\u00f3n del entorno en el que operan las neuronas y contribuyen a mantener las condiciones necesarias para la comunicaci\u00f3n entre ellas. Una alteraci\u00f3n de estas funciones puede afectar la estabilidad de las sinapsis, los puntos de contacto mediante los cuales las neuronas intercambian se\u00f1ales.<\/p>\n

El equipo observ\u00f3 que, en un modelo animal de alzh\u00e9imer, disminu\u00eda la llegada de APOA1 al cerebro antes de que la barrera sufriera una p\u00e9rdida generalizada de su integridad. Al aumentar experimentalmente la producci\u00f3n hep\u00e1tica de esta prote\u00edna, los investigadores consiguieron mejorar determinados indicadores celulares, sin\u00e1pticos y conductuales en los ratones.<\/p>\n

UNA POSIBILIDAD TODAV\u00cdA EXPERIMENTAL<\/h2>\n

Los resultados no demuestran que aumentar la APOA1 pueda prevenir, detener o revertir el alzh\u00e9imer en seres humanos. Los modelos animales permiten investigar procesos biol\u00f3gicos concretos, pero no reproducen toda la complejidad de una enfermedad que puede desarrollarse durante d\u00e9cadas.<\/p>\n

Antes de plantear una aplicaci\u00f3n cl\u00ednica ser\u00e1 necesario comprobar si el mismo mecanismo se altera en pacientes, determinar en qu\u00e9 fases ocurre y establecer si una intervenci\u00f3n sobre esta v\u00eda ser\u00eda segura y eficaz.<\/p>\n

Otra l\u00ednea de investigaci\u00f3n consiste en aprovechar los mecanismos naturales de transporte de la barrera para desarrollar medicamentos capaces de llegar a determinados tipos de c\u00e9lulas. La dificultad de introducir sustancias terap\u00e9uticas en el cerebro constituye uno de los obst\u00e1culos cl\u00e1sicos de la neurolog\u00eda.<\/p>\n

El descubrimiento ampl\u00eda as\u00ed el campo de estudio del alzh\u00e9imer: adem\u00e1s de examinar los procesos que ocurren en el propio cerebro, ser\u00e1 importante investigar c\u00f3mo otros \u00f3rganos contribuyen al mantenimiento de sus funciones. La respuesta definitiva todav\u00eda est\u00e1 lejos, pero esta nueva perspectiva ofrece preguntas concretas que los cient\u00edficos pueden someter a experimentaci\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"

Una investigaci\u00f3n publicada en la revista Cell identifica un mecanismo que podr\u00eda ayudar a explicar las primeras alteraciones del alzh\u00e9imer. Los experimentos, realizados en ratones, apuntan a una relaci\u00f3n entre las prote\u00ednas producidas en el h\u00edgado y la conservaci\u00f3n de las conexiones neuronales. Durante d\u00e9cadas, la barrera hematoencef\u00e1lica se ha estudiado como una de las […]<\/p>\n","protected":false},"author":284226809,"featured_media":8171,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_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":[33205457,2127],"tags":[33208636],"class_list":["post-8173","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-al-dia","category-salud","tag-alzheimer-2"],"acf":{"introduccion":"","fuentes_y_referencias":"

Gladstone Institutes \u2014 comunicado del 11 de noviembre de 2026.<\/a><\/p>

Cell \u2014 estudio original, DOI 10.1016\/j.cell.2026.10.039.<\/a><\/p>

Nature \u2014 an\u00e1lisis del estudio, 11 de noviembre de 2026.<\/a><\/p>

Portada: Shawn Day \/ Unsplash, imagen ilustrativa. Interior: National Cancer Institute \/ Unsplash, imagen ilustrativa.<\/p>","autor":748},"yoast_head":"\nEL H\u00cdGADO PODR\u00cdA OCULTAR UNA CLAVE DEL ALZH\u00c9IMER - Ca\u00f1asanta<\/title>\n<meta name=\"description\" content=\"Un estudio en Cell identifica prote\u00ednas procedentes del h\u00edgado que ayudan a mantener las conexiones neuronales en ratones y abre nuevas preguntas sobre el alzh\u00e9imer.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/canasanta.ca\/en\/health\/higado-proteinas-barrera-hematoencefalica-alzheimer\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"EL H\u00cdGADO PODR\u00cdA OCULTAR UNA CLAVE DEL ALZH\u00c9IMER\" \/>\n<meta property=\"og:description\" content=\"Un estudio en Cell identifica prote\u00ednas procedentes del h\u00edgado que 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