{"id":7218,"date":"2026-11-06T19:58:35","date_gmt":"2026-11-07T00:58:35","guid":{"rendered":"https:\/\/canasanta.ca\/?p=7218"},"modified":"2026-11-06T19:58:35","modified_gmt":"2026-11-07T00:58:35","slug":"adn-interruptores-busqueda-medicamentos","status":"publish","type":"post","link":"https:\/\/canasanta.ca\/en\/salud\/adn-interruptores-busqueda-medicamentos\/","title":{"rendered":"EL ADN ACELERA LA B\u00daSQUEDA DE MEDICAMENTOS"},"content":{"rendered":"

Una investigaci\u00f3n publicada el 5 de noviembre de 2026<\/strong> en la revista Science<\/em> presenta una forma distinta de buscar posibles medicamentos: utilizar diminutos interruptores construidos con ADN para identificar sustancias capaces de modificar la relaci\u00f3n entre dos prote\u00ednas. El m\u00e9todo, denominado FIND<\/strong>, fue desarrollado por investigadores del Instituto Wyss de Harvard<\/strong>, el Hospital Infantil de Boston<\/strong> y la Facultad de Medicina de Harvard<\/strong>. Su promesa no consiste en ofrecer un tratamiento inmediato, sino en mejorar una de las primeras etapas de la investigaci\u00f3n farmac\u00e9utica.<\/p>\n

Durante d\u00e9cadas, buena parte de la b\u00fasqueda de nuevos f\u00e1rmacos ha comenzado preguntando si una mol\u00e9cula se une a determinada prote\u00edna. Pero esa uni\u00f3n, por s\u00ed sola, no garantiza que produzca el efecto biol\u00f3gico deseado. Muchas funciones celulares dependen de la interacci\u00f3n entre prote\u00ednas diferentes, y una sustancia puede favorecer, impedir o alterar esa comunicaci\u00f3n. Precisamente ah\u00ed intenta intervenir la nueva plataforma.<\/p>\n

The team led by Wesley Wong<\/strong>, with Clinton Hansen<\/strong> y Mark Lipstein<\/strong> entre los principales autores, dise\u00f1\u00f3 un sistema capaz de registrar cambios en esas interacciones mediante estructuras de ADN. Cada una funciona como un experimento microsc\u00f3pico identificable, lo que permite estudiar numerosas mol\u00e9culas simult\u00e1neamente sin perder la pista de cu\u00e1l produjo cada resultado.<\/p>\n

UN INTERRUPTOR FABRICADO CON ADN<\/h2>\n

Los llamados nanoswitches<\/em> son fragmentos largos de ADN a los que se incorporan prote\u00ednas y compuestos candidatos. Cuando las prote\u00ednas se aproximan y se unen, la estructura puede formar un bucle; cuando permanecen separadas, conserva una disposici\u00f3n m\u00e1s lineal. Esa diferencia f\u00edsica permite distinguir experimentalmente las interacciones que han cambiado.<\/p>\n

Los investigadores emplearon electroforesis en gel para separar las estructuras seg\u00fan su comportamiento. Las mol\u00e9culas de ADN plegadas en bucle avanzan de manera diferente a las lineales. Despu\u00e9s, c\u00f3digos moleculares asociados a cada candidato permiten identificar qu\u00e9 sustancias estaban presentes en las estructuras seleccionadas. As\u00ed, el resultado funcional queda vinculado con la identidad del compuesto probado.<\/p>\n

UNA BIBLIOTECA DE 400 MILLONES<\/h2>\n

Una de las demostraciones se centr\u00f3 en PPAR-gamma<\/strong>, un receptor relacionado con la sensibilidad a la insulina y el almacenamiento de grasas. El equipo parti\u00f3 de una biblioteca codificada con ADN de aproximadamente 400 millones de mol\u00e9culas<\/strong> y encontr\u00f3 compuestos que favorec\u00edan la interacci\u00f3n del receptor con un fragmento de su prote\u00edna colaboradora CBP<\/strong>.<\/p>\n

Los candidatos seleccionados tambi\u00e9n incrementaron la acumulaci\u00f3n de l\u00edpidos en c\u00e9lulas cultivadas, un resultado compatible con la activaci\u00f3n de PPAR-gamma. Es una se\u00f1al experimental relevante, pero no demuestra que esos compuestos sean medicamentos seguros o eficaces para personas con diabetes. Todav\u00eda habr\u00eda que investigar su selectividad, toxicidad, comportamiento en organismos completos y eventual utilidad cl\u00ednica.<\/p>\n

\"Investigadora
Fotograf\u00eda de contexto de investigaci\u00f3n molecular. CDC \/ Unsplash. No corresponde a los experimentos de FIND.<\/figcaption><\/figure>\n

Para comprobar la versatilidad de FIND, los cient\u00edficos estudiaron adem\u00e1s una interacci\u00f3n entre la prote\u00edna de superficie del SARS-CoV-2<\/strong> y un receptor humano. Identificaron un nanobody<\/em>, una peque\u00f1a prote\u00edna semejante a un anticuerpo, capaz de modificar esa relaci\u00f3n. El resultado sirve como herramienta de investigaci\u00f3n sobre interacciones virales, no como evidencia de un tratamiento contra la infecci\u00f3n.<\/p>\n

PRUEBAS CON VIRUS Y RECEPTORES<\/h2>\n

En otra prueba, la plataforma recuper\u00f3 un activador ya conocido de un receptor beta-2 adren\u00e9rgico incorporado a una mezcla de controles. Esta comprobaci\u00f3n es importante porque permite evaluar si el procedimiento reconoce una actividad esperada y no solamente resultados nuevos dif\u00edciles de interpretar.<\/p>\n

El avance apunta a un problema central de la farmacolog\u00eda: encontrar sustancias que produzcan un efecto concreto, en lugar de limitarse a detectar aquellas que se adhieren a un blanco molecular. Si se reproduce con otros sistemas, podr\u00eda facilitar la exploraci\u00f3n de interacciones que hoy resultan complicadas de estudiar con m\u00e9todos convencionales.<\/p>\n

PROMESA Y L\u00cdMITES<\/h2>\n

Sin embargo, el rendimiento en un laboratorio no equivale a un beneficio demostrado para pacientes. Los experimentos descritos son etapas tempranas de descubrimiento, y el paso desde un candidato molecular hasta un medicamento autorizado exige estudios precl\u00ednicos, ensayos cl\u00ednicos y controles regulatorios. Tambi\u00e9n ser\u00e1 necesario determinar qu\u00e9 tipos de interacciones se prestan mejor al m\u00e9todo y cu\u00e1les plantean limitaciones t\u00e9cnicas.<\/p>\n

La tecnolog\u00eda ya ha sido licenciada a una empresa emergente vinculada con integrantes del equipo, un dato relevante para comprender su posible desarrollo comercial y los intereses asociados. Por ahora, su principal aportaci\u00f3n cient\u00edfica es demostrar que una biblioteca enorme de sustancias puede examinarse atendiendo al comportamiento conjunto de prote\u00ednas, con cada resultado asociado a un identificador molecular.<\/p>\n

El trabajo abre as\u00ed una v\u00eda para buscar herramientas de investigaci\u00f3n y candidatos farmacol\u00f3gicos m\u00e1s dirigidos. No anuncia una cura ni sustituye las pruebas de seguridad, pero s\u00ed propone cambiar la pregunta inicial de muchos experimentos: no solo qu\u00e9 mol\u00e9cula se une a una prote\u00edna, sino qu\u00e9 consigue hacer cuando dos prote\u00ednas necesitan interactuar.<\/p>","protected":false},"excerpt":{"rendered":"

Un sistema de interruptores de ADN examina millones de mol\u00e9culas para identificar nuevas pistas farmacol\u00f3gicas. El estudio se public\u00f3 el 5 de noviembre de 2026.<\/p>","protected":false},"author":284226809,"featured_media":7216,"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":[33208697,33206309],"class_list":["post-7218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-al-dia","category-salud","tag-adn-molecular","tag-descubrimiento-de-farmacos"],"acf":[],"yoast_head":"\nEL ADN ACELERA LA B\u00daSQUEDA DE MEDICAMENTOS - Ca\u00f1asanta<\/title>\n<meta name=\"description\" content=\"Investigadores de Harvard desarrollan interruptores de ADN para buscar posibles f\u00e1rmacos entre 400 millones de mol\u00e9culas. 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