{"id":12429,"date":"2025-07-09T11:56:07","date_gmt":"2025-07-09T14:56:07","guid":{"rendered":"https:\/\/noti-america.com\/site\/argentina\/?p=12429"},"modified":"2025-07-09T11:56:07","modified_gmt":"2025-07-09T14:56:07","slug":"biopsia-liquida-detecta-el-cancer-colorrectal-en-fase-inicial-con-un-95-de-exito","status":"publish","type":"post","link":"https:\/\/noti-america.com\/site\/argentina\/2025\/07\/09\/biopsia-liquida-detecta-el-cancer-colorrectal-en-fase-inicial-con-un-95-de-exito\/","title":{"rendered":"Biopsia l\u00edquida detecta el c\u00e1ncer colorrectal en fase inicial con un 95 % de \u00e9xito"},"content":{"rendered":"<div><\/div>\n<div>NOTI-AMERICA.COM | ARGENTINA<\/div>\n<div>\n<p style=\"text-align: justify\">Cient\u00edficos de Estados Unidos han desarrollado una nueva prueba de biopsia l\u00edquida que utiliza modificaciones del ARN para detectar el c\u00e1ncer colorrectal en su fase inicial. La prueba pudo detectar las primeras etapas de la enfermedad con una precisi\u00f3n del 95 %, una mejora considerable respeto a los m\u00e9todos disponibles actuales.<\/p>\n<p style=\"text-align: justify\">Las biopsias l\u00edquidas son pruebas que detectan signos de c\u00e1ncer mediante una simple extracci\u00f3n de sangre y que, a diferencia de las biopsias tradicionales, que necesitan una muestra de tejido, suelen buscar mutaciones o cambios en fragmentos de ADN de c\u00e9lulas cancerosas que circulan en la sangre.<\/p>\n<p style=\"text-align: justify\">Sin embargo, aunque las biopsias l\u00edquidas son una forma prometedora y no invasiva de detectar y controlar el c\u00e1ncer a medida que avanza, todav\u00eda no son tan sensibles ni precisas en las primeras etapas de la enfermedad.<\/p>\n<p style=\"text-align: justify\">Ahora, un equipo de cient\u00edficos de la Universidad de Chicago ha desarrollado una biopsia l\u00edquida que utiliza ARN en lugar de ADN para detectar el c\u00e1ncer y que se emplea con muestras de sangre de pacientes con c\u00e1ncer colorrectal. Los detalles se han publicado este martes en Nature Biotechnology<\/p>\n<p style=\"text-align: justify\">Diagn\u00f3stico precoz<\/p>\n<p style=\"text-align: justify\">Cuando las c\u00e9lulas tumorales mueren, liberan part\u00edculas de material gen\u00e9tico al torrente sangu\u00edneo. Las biopsias l\u00edquidas est\u00e1ndar se basan en este ADN flotante, denominado ADN libre circulante (cfDNA), para detectar el c\u00e1ncer.<\/p>\n<p style=\"text-align: justify\">Pero en las primeras etapas de la enfermedad, cuando las c\u00e9lulas tumorales a\u00fan est\u00e1n creciendo y proliferando, no hay mucho cfDNA en la sangre, lo que \u00abha supuesto un gran reto para el diagn\u00f3stico precoz\u00bb, explica Chuan He, profesor de Bioqu\u00edmica y Biolog\u00eda Molecular en la Universidad de Chicago.<\/p>\n<p style=\"text-align: justify\">Para hacer el estudio, el equipo investig\u00f3 la posibilidad de utilizar ARN libre circulante (cfRNA), en lugar de cfDNA, para detectar el c\u00e1ncer.<\/p>\n<p style=\"text-align: justify\">Con muestras de pacientes con c\u00e1ncer colorrectal no solo pudieron medir las modificaciones en el ARN libre de c\u00e9lulas humanas, sino que tambi\u00e9n pudieron detectar ARN de microbios intestinales (cuando hay un tumor, los miles de millones de bacterias del sistema digestivo -microbiota- cambian su actividad).<\/p>\n<p style=\"text-align: justify\">Bas\u00e1ndose en investigaciones previas, el equipo sab\u00eda que los niveles de modificaci\u00f3n del ARN reflejan el estado de un organismo: cuanto m\u00e1s activo es el organismo, m\u00e1s modificaciones se producen en determinados ARN para mantener esa actividad. Este mismo patr\u00f3n se observ\u00f3 tambi\u00e9n en las muestras de c\u00e1ncer colorrectal.<\/p>\n<p style=\"text-align: justify\">\u00abDescubrimos que el ARN liberado por los microbios presenta diferencias sustanciales entre los pacientes con c\u00e1ncer y las personas sanas\u00bb, comenta He.<\/p>\n<p style=\"text-align: justify\">\u00abEn el intestino, cuando hay un tumor en crecimiento, el microbioma cercano debe remodelarse en respuesta a esa inflamaci\u00f3n. Eso afecta a los microbios cercanos\u00bb.<\/p>\n<p style=\"text-align: justify\">La poblaci\u00f3n del microbioma tambi\u00e9n se renueva mucho m\u00e1s r\u00e1pidamente que las c\u00e9lulas humanas, con m\u00e1s c\u00e9lulas que mueren con mayor frecuencia y liberan fragmentos de ARN al torrente sangu\u00edneo, lo que significa que una prueba que mida las modificaciones en el ARN microbiano puede detectar una posible actividad cancerosa mucho antes que las pruebas que se basan en el ADN liberado por las c\u00e9lulas tumorales humanas.<\/p>\n<p style=\"text-align: justify\">Pruebas comerciales<\/p>\n<p style=\"text-align: justify\">Las pruebas comerciales que miden la abundancia de ADN o ARN en las heces tienen una precisi\u00f3n de alrededor del 90 % para las etapas avanzadas del c\u00e1ncer, pero su precisi\u00f3n cae por debajo del 50 % para las etapas tempranas.<\/p>\n<p style=\"text-align: justify\">La nueva prueba basada en la modificaci\u00f3n del ARN tuvo una precisi\u00f3n global de casi el 95 %, y tambi\u00e9n fue precisa en las etapas m\u00e1s tempranas del c\u00e1ncer.<\/p>\n<p style=\"text-align: justify\">\u00abEsta es la primera vez que se utilizan las modificaciones del ARN como posible biomarcador del c\u00e1ncer, y parece ser mucho m\u00e1s fiable y sensible en comparaci\u00f3n con la abundancia de ARN\u00bb, subraya He.<\/p>\n<p style=\"text-align: justify\">\u00abSer capaz de detectar el c\u00e1ncer en esas etapas tempranas no tiene precedentes\u00bb, concluye.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>NOTI-AMERICA.COM | ARGENTINA Cient\u00edficos de Estados Unidos han desarrollado una nueva prueba de biopsia l\u00edquida que utiliza modificaciones del ARN para detectar el c\u00e1ncer colorrectal en su fase inicial. La prueba pudo detectar las&#46;&#46;&#46;<\/p>\n","protected":false},"author":133,"featured_media":12430,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":{"twitter_242054905_242054905":""},"rop_publish_now_history":[],"rop_publish_now_status":"pending","_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[307],"tags":[],"class_list":["post-12429","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-salud-2","post_format-post-format-image"],"acf":[],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.9 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Biopsia l\u00edquida detecta el c\u00e1ncer colorrectal en fase inicial con un 95 % de \u00e9xito - Argentina | Noti-America.com<\/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:\/\/noti-america.com\/site\/argentina\/2025\/07\/09\/biopsia-liquida-detecta-el-cancer-colorrectal-en-fase-inicial-con-un-95-de-exito\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Biopsia l\u00edquida detecta el c\u00e1ncer colorrectal en fase inicial con un 95 % de \u00e9xito\" \/>\n<meta property=\"og:description\" content=\"NOTI-AMERICA.COM | ARGENTINA Cient\u00edficos de Estados Unidos han desarrollado una nueva prueba de biopsia l\u00edquida que utiliza modificaciones del ARN para detectar el c\u00e1ncer colorrectal en su fase inicial. 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