{"id":292568,"date":"2025-11-17T12:30:22","date_gmt":"2025-11-17T11:30:22","guid":{"rendered":"https:\/\/www.cbm.uam.es\/?p=292568"},"modified":"2025-11-17T12:34:37","modified_gmt":"2025-11-17T11:34:37","slug":"un-nuevo-metodo-espanol-simplifica-la-deteccion-de-arn-de-virus-como-el-sars-cov-2","status":"publish","type":"post","link":"https:\/\/www.cbm.uam.es\/index.php\/2025\/11\/17\/un-nuevo-metodo-espanol-simplifica-la-deteccion-de-arn-de-virus-como-el-sars-cov-2\/","title":{"rendered":"Un nuevo m\u00e9todo espa\u00f1ol simplifica la detecci\u00f3n de ARN de virus como el SARS-CoV-2"},"content":{"rendered":"<p>Un equipo del Centro de Biolog\u00eda Molecular Severo Ochoa (CBM, CSIC\u2013UAM) ha desarrollado un nuevo m\u00e9todo para detectar ARN \u2014como el de virus respiratorios o pat\u00f3genos emergentes\u2014 de forma r\u00e1pida, sencilla y sin necesidad de usar la t\u00e9cnica de PCR tradicional ni costosos aparatos de laboratorio.<\/p>\n<p>El avance se basa en una tecnolog\u00eda llamada amplificaci\u00f3n isot\u00e9rmica, una forma de copiar material gen\u00e9tico que funciona siempre a una misma temperatura. A diferencia de la PCR (reacci\u00f3n en cadena de la polimerasa), que requiere subir y bajar la temperatura muchas veces para copiar el ADN\u00a0 \u2014algo que solo puede hacerse con equipos especializados\u2014, la amplificaci\u00f3n isot\u00e9rmica se realiza a una temperatura constante.<\/p>\n<p>\u201cCon este sistema podemos obtener resultados en apenas dos horas y sin m\u00e1quinas de PCR, lo que lo hace mucho m\u00e1s accesible\u201d, explica Miguel de Vega, investigador principal del CBM. \u201cEl resultado positivo puede incluso verse como un cambio de color, a simple vista\u201d.<\/p>\n<p>El nuevo m\u00e9todo utiliza una sonda testigo \u00a0de ADN que se une espec\u00edficamente al ARN que se quiere detectar, circulariz\u00e1ndose. Luego, un conjunto de enzimas hace que esa sonda, ya circular, se replique una y otra vez, lo que amplifica la se\u00f1al que informa de la presencia del ARN.<\/p>\n<p>La clave est\u00e1 en una enzima dise\u00f1ada por el equipo, llamada Qx5, una versi\u00f3n mejorada de la ADN polimerasa del fago Phi29 que, a diferencia de las convencionales, puede usar directamente el ARN diana como punto de partida para comenzar la copia continua de la sonda de ADN circular. Esta enzima se combina con otra enzima llamada TthPrimPol, que genera m\u00faltiples iniciadores (unas peque\u00f1as piezas de ADN) sobre la copia de ADN que se est\u00e1 realizando, y que ser\u00e1n utilizados por Qx5 para lograr una amplificaci\u00f3n exponencial de la sonda testigo inicial.<\/p>\n<p>El sistema produce as\u00ed una amplificaci\u00f3n potente sin necesidad de los pasos previos habituales de transcripci\u00f3n inversa y dise\u00f1o de iniciadores \u2014dos de los principales cuellos de botella en el diagn\u00f3stico de ARN. \u201cNuestra tecnolog\u00eda elimina los pasos m\u00e1s lentos y complicados del diagn\u00f3stico molecular\u201d, se\u00f1ala Luis Blanco, investigador principal del CBM. \u201cEsto abre la puerta a test r\u00e1pidos, econ\u00f3micos y port\u00e1tiles, que podr\u00edan usarse en cl\u00ednicas rurales, aeropuertos o en situaciones de emergencia sanitaria\u201d.<\/p>\n<p>La simplicidad del m\u00e9todo podr\u00eda facilitar el desarrollo de kits de diagn\u00f3stico accesibles y de bajo coste, \u00fatiles tanto para la detecci\u00f3n de virus como para otras aplicaciones biom\u00e9dicas.<\/p>\n<p>El trabajo, firmado por Alicia del Prado, Mar\u00eda I. Mart\u00ednez-Jim\u00e9nez, Luis Blanco y Miguel de Vega, se publica bajo el t\u00edtulo <em>\u201cNovel primer-less amplification method for detection of RNA molecules\u201d<\/em> (<em>Methods<\/em>, 244 (2025), pp. 227-239, 10.1016\/j.ymeth.2025.10.007).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un equipo del Centro de Biolog\u00eda Molecular Severo Ochoa (CBM, CSIC\u2013UAM) ha desarrollado un nuevo m\u00e9todo para detectar ARN \u2014como el de virus respiratorios o pat\u00f3genos emergentes\u2014 de forma r\u00e1pida, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":292570,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[44,54],"tags":[],"class_list":["post-292568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-scientific-article"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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