{"id":23854,"date":"2021-08-03T08:52:26","date_gmt":"2021-08-03T14:52:26","guid":{"rendered":"https:\/\/otech.uaeh.edu.mx\/noti\/?p=23854"},"modified":"2021-08-03T08:52:38","modified_gmt":"2021-08-03T14:52:38","slug":"el-nuevo-interruptor-universal-permite-a-los-cientificos-ajustar-la-terapia-genica","status":"publish","type":"post","link":"https:\/\/otech.uaeh.edu.mx\/noti\/ciencia\/el-nuevo-interruptor-universal-permite-a-los-cientificos-ajustar-la-terapia-genica\/","title":{"rendered":"El nuevo &#8216;interruptor universal&#8217; permite a los cient\u00edficos ajustar la terapia g\u00e9nica"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Ese es el principio central de la farmacolog\u00eda. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Incluso la sal puede matarlo si toma muy poca o demasiado. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00bfEl \u00fanico tratamiento transformador que no ha seguido esta regla? <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Terapia de genes.<\/span><\/span><\/span><\/span><!--more--><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">No es que la terapia g\u00e9nica haya sido dise\u00f1ado para romper las reglas, pero hasta ahora, los cient\u00edficos no han podido controlar eficazmente su fuerza. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Una vez liberado en el cuerpo, el tratamiento reemplaza un gen defectuoso por uno sano, lo que permite que el cuerpo produzca prote\u00ednas funcionales. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Pero a veces el nivel de esas prote\u00ednas es demasiado bajo, act\u00faa anulando cualquier efecto terap\u00e9utico, y otras veces demasiado alto, envenenando las c\u00e9lulas que se supone que deben tratar.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Esta semana, los cient\u00edficos\u00a0 <\/span><\/span><\/span><\/span><a style=\"color: #000000;\" href=\"https:\/\/www.nature.com\/articles\/s41586-021-03770-2?utm_source=other&amp;utm_medium=other&amp;utm_content=null&amp;utm_campaign=JRCN_1_DD01_CN_NatureRJ_article_paid_XMOL\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">finalmente obtuvieron el control<\/span><\/span><\/span><\/span><\/a><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0de la tecnolog\u00eda con una estrategia genial. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Un equipo del Hospital de Ni\u00f1os de Filadelfia (CHOP) aprovech\u00f3 un proceso natural durante la expresi\u00f3n g\u00e9nica, cuando los genes producen prote\u00ednas, y lo secuestr\u00f3 para hacer un &#8220;atenuador&#8221; que controla la fuerza de potencialmente cualquier terapia g\u00e9nica.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Apodado X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">on<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0, el interruptor de encendido es f\u00e1cil: simplemente tome un medicamento simple, uno que ya est\u00e1 en ensayos cl\u00ednicos en una etapa posterior. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Luego, el medicamento funciona con el interruptor dise\u00f1ado a medida del equipo para activar la terapia en todo el cuerpo: cuanto mayor es la dosis, m\u00e1s fuerte es la expresi\u00f3n gen\u00e9tica. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">A medida que el cuerpo metaboliza el f\u00e1rmaco, el regulador apaga gradualmente el tratamiento. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00bfNecesitas m\u00e1s prote\u00edna? <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Toma otra pastilla.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">En ratones, el equipo afin\u00f3 la expresi\u00f3n de prote\u00ednas que ayudan a tratar la anemia en la enfermedad renal cr\u00f3nica, aument\u00f3 el nivel de una prote\u00edna que protege contra un tipo de demencia y control\u00f3 la fuerza de CRISPR para editar genes en el h\u00edgado.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">&#8220;Estamos llevando el campo de la terapia g\u00e9nica a un nivel completamente nuevo en el que se requiere una dosificaci\u00f3n ajustada para la seguridad, la utilidad y el \u00e9xito&#8221;,\u00a0 <\/span><\/span><\/span><\/span><a style=\"color: #000000;\" href=\"https:\/\/www.chop.edu\/news\/children-s-hospital-philadelphia-researchers-develop-dimmer-switch-help-control-gene-therapy\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">dijo la<\/span><\/span><\/span><\/span><\/a><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0autora principal, la Dra. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Beverly L. Davidson.<\/span><\/span><\/span><\/span><\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Los entresijos de la medicina gen\u00e9tica<\/span><\/span><\/span><\/span><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Me gusta pensar en la terapia g\u00e9nica como una nave espacial que lleva nuestro c\u00f3digo gen\u00e9tico.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">La mayor\u00eda de las terapias gen\u00e9ticas tienen dos componentes. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Primero est\u00e1 la nave espacial, que suele ser un tipo de virus modificado gen\u00e9ticamente. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Estos virus no pueden causar enfermedades en los humanos, pero a\u00fan pueden invadir nuestras c\u00e9lulas, lo que les permite traer el segundo componente: la carga \u00fatil. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Gran parte de la terapia g\u00e9nica se ha centrado en desarrollar estas naves espaciales para que se acoplen al tipo de c\u00e9lula correcta sin desencadenar un ataque inmunol\u00f3gico.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">La carga \u00fatil es una pieza circular de ADN, un vector, que codifica el gen sano y otros componentes reguladores; <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">estos \u00faltimos son \u00fatiles traductores que se comunican con la c\u00e9lula hu\u00e9sped para convertir el c\u00f3digo gen\u00e9tico en prote\u00ednas. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Piense en el vector como un c\u00edrculo de bloques de Lego, con una cuerda en el medio para unirlos a todos. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Cada bloque de logotipo es un gen o un componente &#8220;traductor&#8221;. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Dependiendo de la enfermedad gen\u00e9tica, podemos cambiar esos Legos por otros, pr\u00e1cticamente plug-and-play.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Una vez dentro de la celda, el vector hace su magia. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">B\u00e1sicamente, engatusa a la c\u00e9lula para que bombee prote\u00ednas que normalmente no produce, unas que pueden anular las mutantes o deficientes. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Su ADN se traduce en un mensajero, ARN, que lleva la informaci\u00f3n a la f\u00e1brica de producci\u00f3n de prote\u00ednas de la c\u00e9lula.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00bfLa chispa de genio del equipo? <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Se dieron cuenta de que pod\u00edan secuestrar este paso, de ADN a ARN, para hacer un regulador de intensidad personalizado para todo el proceso.<\/span><\/span><\/span><\/span><\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Conoce a X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">en<\/span><\/span><\/span><\/span><\/sup><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">El ARN no se forma completamente. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Su primera versi\u00f3n, pre-ARN, traduce fielmente el ADN, incluido el c\u00f3digo gen\u00e9tico que produce prote\u00ednas, pero tambi\u00e9n letras basura sin ning\u00fan significado. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Luego, la c\u00e9lula corta estos trozos extra\u00f1os, dejando solo exones para formar ARN maduro que puede producir prote\u00ednas. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Un solo gen puede tener m\u00faltiples exones. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Durante estos nip-tucks, dependiendo de qu\u00e9 partes se corten, una hebra de ARN puede producir m\u00faltiples variaciones de prote\u00ednas, o algunas veces ninguna.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00bfCabeza dando vueltas? <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Piense en el ARN como una larga cadena de bloques de Scrabble, con algunas porciones que forman &#8220;palabras&#8221; de prote\u00ednas. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Dependiendo de los bloques que elimine, puede obtener varias palabras o un galimat\u00edas completo.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Este proceso, empalme alternativo, es a lo que se aferr\u00f3 el equipo. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Usando una t\u00e9cnica llamada secuenciaci\u00f3n de ARN, que analiza todas las mol\u00e9culas de ARN a la vez en la c\u00e9lula, se encontr\u00f3 una que solo se empalmaba para producir una prote\u00edna en presencia de un f\u00e1rmaco, LMI070 (pegajoso, lo s\u00e9). <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Agregue el medicamento y las letras de ARN scrabble se vuelva a ensamblar para producir prote\u00ednas. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Sin la droga hacen tonter\u00edas, que r\u00e1pidamente la c\u00e9lula desecha.<\/span><\/span><\/span><\/span><\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Cuerpo a Cerebro<\/span><\/span><\/span><\/span><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Con una serie de pruebas tanto en placas de Petri como en ratones, el equipo valid\u00f3 a continuaci\u00f3n su nuevo bloque Lego de terapia g\u00e9nica.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">En una prueba, agregaron un gen para la eritropoyetina (Epo), que ayuda a tratar la anemia o la falta de gl\u00f3bulos rojos sanos que transportan ox\u00edgeno, y que a menudo se acompa\u00f1a de una enfermedad renal cr\u00f3nica. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Despu\u00e9s de inyectar el vector de la terapia g\u00e9nica, que lleva el atenuador, a los ratones a trav\u00e9s de su torrente sangu\u00edneo, el equipo les dio el f\u00e1rmaco. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Con solo una pastilla, el nivel de la prote\u00edna terap\u00e9utica se dispar\u00f3. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Una dosis m\u00e1s baja aumenta la prote\u00edna 25 veces; <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">cuadriplicar la dosis aument\u00f3 la prote\u00edna a 10 veces. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">El tratamiento increment\u00f3 el porcentaje de gl\u00f3bulos rojos en la sangre de los ratones, lo que es un signo de tratamiento para la anemia.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">&#8220;La dosis de un medicamento puede determinar qu\u00e9 tan alto desea que sea la expresi\u00f3n&#8221;, dijo Davidson.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Muchas enfermedades cr\u00f3nicas, como la enfermedad renal, necesitan tratamientos a largo plazo. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Debido a que los niveles de Epo disminuyeron gradualmente despu\u00e9s de la primera dosis, el equipo retir\u00f3 a los ratones con una segunda dosis. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Los niveles de prote\u00ednas se dispararon de nuevo, lo que demuestra que es posible mantener la terapia g\u00e9nica y detenerla cuando ya no sea necesario.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">En otra prueba, el equipo demostr\u00f3 que X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">on<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0podr\u00eda desencadenar prote\u00ednas protectoras en el cerebro contra la demencia frontotemporal, un tipo de demencia que afecta la parte frontal y los lados del cerebro. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Normalmente, la barrera hematoencef\u00e1lica, una barrera de c\u00e9lulas entre las c\u00e9lulas del cerebro y la sangre, mantiene alejados a los medicamentos y otras terapias. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Aqu\u00ed, X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">sobre<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0funcion\u00f3 como magia. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Cuando se empaquet\u00f3 en un virus ligeramente diferente, el sistema entr\u00f3 como un vals en el cerebro despu\u00e9s de ser inyectado en el torrente sangu\u00edneo.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Al igual que la droga. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Dentro de las 24 horas posteriores a que los ratones ingirieran la sustancia qu\u00edmica, sus cerebros muestran el nivel de la prote\u00edna protectora en todo momento. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Pero lo fundamental, dijeron los autores, es que los niveles eran m\u00e1s bajos, y mucho m\u00e1s seguros, que los intentos de terapia g\u00e9nica sin el atenuador. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">on<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0pudo controlar el nivel de la prote\u00edna a un grado terap\u00e9utico sin desencadenar una respuesta inmune grave en el cerebro.<\/span><\/span><\/span><\/span><\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Subir de nivel<\/span><\/span><\/span><\/span><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Dejando de lado la terap\u00e9utica, X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">on<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0tambi\u00e9n puede afinar algunas de nuestras herramientas biol\u00f3gicas m\u00e1s salvajes hasta ahora: CRISPR y\u00a0 <\/span><\/span><\/span><\/span><a style=\"color: #000000;\" href=\"https:\/\/singularityhub.com\/2018\/08\/07\/car-t-may-be-a-silver-bullet-against-cancer-and-heres-what-else-it-can-do\/\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">CAR-T<\/span><\/span><\/span><\/span><\/a><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">En Una prueba, el equipo Hizo Una versi\u00f3n Mini de X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">en<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0el p\u00e1rrafo Controlar la Actividad de Cas9, el Componente de &#8220;tijera&#8221; de CRISPR. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">De manera similar a la terapia g\u00e9nica, CRISPR hace un alboroto por la edici\u00f3n de genes una vez que se inyecta dentro del cuerpo. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">En ratones, X\u00a0 <\/span><\/span><\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">on<\/span><\/span><\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0pudo domesticar la herramienta para que solo editara su gen objetivo despu\u00e9s de que los ratones recibieron el medicamento.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">&#8220;Los tratamientos basados \u200b\u200ben CRISPR se beneficiar\u00e1n&#8221; de estos cambios, escribieron los autores. <\/span><span style=\"vertical-align: inherit;\">Las r\u00e1fagas cortas de edici\u00f3n gen\u00e9tica, en comparaci\u00f3n con el sistema siempre activo que tenemos ahora, podr\u00edan potencialmente potencialmente los efectos secundarios. <\/span><span style=\"vertical-align: inherit;\">Para el tratamiento de afecciones cr\u00f3nicas, tener un interruptor tambi\u00e9n podr\u00eda limitar cualquier respuesta inmune contra la herramienta de edici\u00f3n de genes.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Del mismo modo, la adici\u00f3n de X\u00a0 <\/span><\/span><sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">en el<\/span><\/span><\/sup><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0CAR-T podr\u00eda darle el tratamiento del c\u00e1ncer epis\u00f3dico impacto a\u00fan m\u00e1s amplio.\u00a0<\/span><\/span><a style=\"color: #000000;\" href=\"https:\/\/singularityhub.com\/2019\/07\/10\/cancer-killing-living-drug-is-made-safer-with-a-simple-off-switch\/\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">CAR-T<\/span><\/span><\/a><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0toma las c\u00e9lulas T inmunes del cuerpo de un paciente, las manipula gen\u00e9ticamente para atacar mejor un cierto tipo de c\u00e1ncer y las vuelve a inyectar en el cuerpo. <\/span><span style=\"vertical-align: inherit;\">Si bien es un avance m\u00e9dico, CAR-T ha estado plagado de efectos secundarios inmunes. <\/span><span style=\"vertical-align: inherit;\">Un &#8220;atenuador&#8221; para la terapia podr\u00eda dar un descanso a las c\u00e9lulas T, lo que podr\u00eda amortiguar las reacciones no deseadas.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">&#8220;Anticipamos que este sistema podr\u00eda adaptarse a cualquier cuesti\u00f3n biol\u00f3gica o aplicaci\u00f3n en la que se desee el control fino de la expresi\u00f3n [de prote\u00ednas]&#8221;, escribieron los autores.<\/span><\/span><\/span><\/p>\n<p><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Fuente:<\/span><\/span><\/p>\n<p><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Fan, S. (2021d, 3 de agosto). <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">El nuevo \u00abinterruptor universal\u00bb permite a los cient\u00edficos ajustar la terapia g\u00e9nica. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Recuperado 3 de agosto de 2021, de https:\/\/singularityhub.com\/2021\/08\/03\/new-universal-switch-lets-scientists-fine-tune-gene-therapy\/<\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ese es el principio central de la farmacolog\u00eda. Incluso la sal puede matarlo si toma muy poca o demasiado. \u00bfEl \u00fanico tratamiento transformador que no ha seguido esta regla? Terapia de genes.<\/p>\n","protected":false},"author":1,"featured_media":23855,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[],"class_list":["post-23854","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>El nuevo &#039;interruptor universal&#039; permite a los cient\u00edficos ajustar la terapia g\u00e9nica - Observatorio Tecnol\u00f3gico de Hidalgo<\/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:\/\/otech.uaeh.edu.mx\/noti\/ciencia\/el-nuevo-interruptor-universal-permite-a-los-cientificos-ajustar-la-terapia-genica\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"El nuevo &#039;interruptor universal&#039; permite a los cient\u00edficos ajustar la terapia g\u00e9nica - Observatorio Tecnol\u00f3gico de Hidalgo\" \/>\n<meta property=\"og:description\" content=\"Ese es el principio central de la farmacolog\u00eda. 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