{"id":429256,"date":"2026-09-13T23:57:12","date_gmt":"2026-09-13T23:57:12","guid":{"rendered":"http:\/\/6aa70f1238acd37662da004b"},"modified":"2026-09-13T23:57:12","modified_gmt":"2026-09-13T23:57:12","slug":"nueva-terapia-contra-el-cancer-consiste-en-reprogramar-el-sistema-inmunitario-con-nanoparticulas-inteligentes","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=429256","title":{"rendered":"Nueva terapia contra el c\u00e1ncer consiste en reprogramar el sistema inmunitario con nanopart\u00edculas inteligentes"},"content":{"rendered":"<p>Una de las mayores dificultades para combatir el c\u00e1ncer no es \u00fanicamente destruir las c\u00e9lulas tumorales, sino lograr que el propio sistema inmunitario pueda reconocerlas y atacarlas. En muchos tumores, las defensas del cuerpo se encuentran con un entorno que, parad\u00f3jicamente, favorece al c\u00e1ncer. A partir de esa idea, un equipo de investigadores de la Universidad de Adelaida (en Australia) ha desarrollado nanopart\u00edculas inteligentes que son capaces de intervenir directamente en ese entorno y transformar algunas de sus c\u00e9lulas inmunitarias en aliadas de la respuesta antitumoral.<\/p>\n<p>El estudio, publicado esta semana en <em>Science Advances<\/em>, se enfoca en los llamados macr\u00f3fagos asociados a tumores, c\u00e9lulas del <a href=\"https:\/\/es.wired.com\/articulos\/cientificos-calculan-que-el-sistema-inmune-esta-formado-por-18-billones-de-celulas\">sistema inmunitario<\/a> que pueden llegar a desempe\u00f1ar un papel contradictorio. Aunque los macr\u00f3fagos normalmente participan en la defensa del organismo, dentro de algunos tumores pueden adoptar un comportamiento inmunosupresor, ya que ayudan a crear un ambiente que dificulta la llegada y actividad de los linfocitos T, una de las principales armas del sistema inmunitario contra las c\u00e9lulas cancerosas.<\/p>\n<p>\u201cUno de los mayores desaf\u00edos en la inmunoterapia contra el c\u00e1ncer es que, si bien el sistema inmunitario puede atacar un tumor, el microambiente tumoral puede impedir que esas c\u00e9lulas inmunitarias cumplan su funci\u00f3n\u201d, explic\u00f3 la investigadora principal, Chunxia Zhao, profesora de la Facultad de Ingenier\u00eda Qu\u00edmica, <a data-offer-url=\"https:\/\/adelaide.edu.au\/about\/news\/2026\/new--smart--nanoparticles-help-the-immune-system-better-attack-t\/\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/adelaide.edu.au\/about\/news\/2026\/new--smart--nanoparticles-help-the-immune-system-better-attack-t\/&quot;}\" href=\"https:\/\/adelaide.edu.au\/about\/news\/2026\/new--smart--nanoparticles-help-the-immune-system-better-attack-t\/\" rel=\"nofollow noopener\" target=\"_blank\">en un comunicado<\/a> de la Universidad de Adelaida.<\/p>\n<p><strong>\u201cNuestro enfoque est\u00e1 dise\u00f1ado para modificar ese microambiente desde el interior del tumor.<\/strong> Al dirigirnos espec\u00edficamente a los macr\u00f3fagos asociados al tumor, podemos administrar el tratamiento donde se necesita y estimular a las c\u00e9lulas T del sistema inmunitario, encargadas de combatir el c\u00e1ncer, para que penetren en el tumor y se activen\u201d.<\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"20.107279693487\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"article image\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/6aa450a76f6bc83ebdeac757\/master\/w_120,c_limit\/2281085983 120w, https:\/\/media.es.wired.com\/photos\/6aa450a76f6bc83ebdeac757\/master\/w_240,c_limit\/2281085983 240w, https:\/\/media.es.wired.com\/photos\/6aa450a76f6bc83ebdeac757\/master\/w_320,c_limit\/2281085983 320w, https:\/\/media.es.wired.com\/photos\/6aa450a76f6bc83ebdeac757\/master\/w_640,c_limit\/2281085983 640w, https:\/\/media.es.wired.com\/photos\/6aa450a76f6bc83ebdeac757\/master\/w_768,c_limit\/2281085983 768w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/6aa450a76f6bc83ebdeac757\/master\/w_775%2Cc_limit\/2281085983\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"21.36398467433\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs iUENtL dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco ILkR hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/beber-cafe-o-te-muy-caliente-eleva-el-riesgo-de-este-tipo-de-cancer-de-esofago\" data-testid=\"ContentCardEmbedHedLink\">Surge m\u00e1s evidencia de que beber caf\u00e9 o t\u00e9 muy caliente eleva el riesgo de c\u00e1ncer de es\u00f3fago<\/a><\/div>\n<p>Desde 2016, beber bebidas muy calientes est\u00e1 clasificado como \u201cprobablemente carcinog\u00e9nico\u201d. Un nuevo estudio refuerza su v\u00ednculo con el c\u00e1ncer de es\u00f3fago.<\/p>\n<\/div>\n<\/div>\n<hr>\n<h2>\u00bfC\u00f3mo operan las nanopart\u00edculas inteligentes?<\/h2>\n<p>La estrategia desarrollada por los investigadores consiste en emplear nanopart\u00edculas lip\u00eddicas, diminutas estructuras capaces de transportar mol\u00e9culas al interior de las c\u00e9lulas. Estas part\u00edculas llevan dos componentes: una mol\u00e9cula llamada resiquimod, capaz de estimular determinadas v\u00edas del sistema inmunitario, y el ARN mensajero (ARNm) que contiene las instrucciones para producir CXCL9, una quimiocina que funciona como una se\u00f1al de reclutamiento para los linfocitos T citot\u00f3xicos o CD8+, especializados en destruir c\u00e9lulas anormales.<\/p>\n<p>Todo muy bien, pero el aspecto m\u00e1s importante del sistema es su mecanismo de punter\u00eda. Las nanopart\u00edculas fueron recubiertas con anticuerpos dirigidos contra TREM2, una prote\u00edna presente en los macr\u00f3fagos inmunosupresores asociados al tumor. La intenci\u00f3n era que el tratamiento llegara preferentemente a estas c\u00e9lulas y no, en la misma medida, a las propias c\u00e9lulas cancerosas. Los experimentos realizados en el laboratorio mostraron que esta estrategia mejoraba la entrega del ARNm a los macr\u00f3fagos inmunosupresores y reduc\u00eda su llegada a las c\u00e9lulas tumorales.<\/p>\n<p>Una vez dentro de los macr\u00f3fagos, el tratamiento busc\u00f3 producir un efecto doble. Por un lado, el resiquimod ayudaba a reprogramar estas c\u00e9lulas, reduciendo su comportamiento inmunosupresor. Por otro, el ARNm permit\u00eda que produjeran CXCL9, la se\u00f1al qu\u00edmica relacionada con la llegada de linfocitos T al tumor.<\/p>\n<p>Seg\u00fan los resultados obtenidos <em>in vitro<\/em>, las nanopart\u00edculas dirigidas a TREM2 produjeron la mayor cantidad de CXCL9 y redujeron 2.5 veces la expresi\u00f3n de ARG1, un marcador asociado con la actividad inmunosupresora, mientras que aumentaron 89.5 veces la expresi\u00f3n de NOS2, relacionada con un perfil m\u00e1s inflamatorio.<\/p>\n<p>El siguiente paso fue comprobar si este mecanismo pod\u00eda funcionar dentro de un organismo. Los investigadores administraron el tratamiento a ratones portadores de tumores de mama 4T1. Despu\u00e9s de tres dosis, <strong>observaron una reducci\u00f3n del crecimiento tumoral y un aumento considerable de CXCL9 dentro de los tumores.<\/strong> En el grupo tratado con nanopart\u00edculas dirigidas a TREM2, la concentraci\u00f3n de esta quimiocina fue aproximadamente cuatro veces superior a la del grupo de control.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Una de las mayores dificultades para combatir&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":429257,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_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":[46],"tags":[],"class_list":["post-429256","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - 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