{"id":2839,"date":"2022-10-03T07:04:54","date_gmt":"2022-10-03T07:04:54","guid":{"rendered":"https:\/\/neuropediatoolbox.org\/?p=2839"},"modified":"2023-08-27T08:41:36","modified_gmt":"2023-08-27T08:41:36","slug":"mutaciones-intronicas-profundas","status":"publish","type":"post","link":"https:\/\/neuropediatoolkit.org\/en\/mutaciones-intronicas-profundas\/","title":{"rendered":"Mutaciones intr\u00f3nicas profundas."},"content":{"rendered":"\n<p>La <strong>secuenciaci\u00f3n masiva del exoma<\/strong>, como estrategia m\u00e1s coste-eficiente en el diagn\u00f3stico gen\u00e9tico de las enfermedades monogen\u00e9ticas mendelianas, tiene una limitaci\u00f3n impuesta por su propio dise\u00f1o: no incluye la secuenciaci\u00f3n de las regiones intr\u00f3nicas. Ya es posible realizar la secuenciaci\u00f3n masiva de todo el genoma, pero sin embargo, las tecnolog\u00edas bioinform\u00e1ticas y la acumulaci\u00f3n cient\u00edfica necesaria para procesar la informaci\u00f3n obtenible por esta t\u00e9cnica a\u00fan no han madurado lo suficiente como para que sea utilizada en la pr\u00e1ctica cl\u00ednica diaria. Es por ello que debemos ser conscientes de la posibilidad de que algunas enfermedades puedan ser explicadas por variantes intr\u00f3nicas profundas no detectadas mediante secuenciaci\u00f3n del exoma.<\/p>\n\n\n\n<p>Esto es de inter\u00e9s especial para las enfermedades recesivas, y debe ser tenido en cuenta en caso de detectar una variante patog\u00e9nica en un alelo, pero no en el otro, en un caso con un fenotipo altamente sugerente de la enfermedad, ante la posibilidad de que exista heterocigosis compuesta.<\/p>\n\n\n\n<div id=\"wp-block-themeisle-blocks-accordion-c9375abf\" class=\"wp-block-themeisle-blocks-accordion exclusive\">\n<details class=\"wp-block-themeisle-blocks-accordion-item\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>Splicing.<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<p>El mecanismo por el cual las variantes intr\u00f3nicas tienen consecuencias sobre el fenotipo tiene que ver principalmente con el splicing.<\/p>\n\n\n\n<p>La presencia de intrones en el genoma es un fen\u00f3meno biol\u00f3gico caracter\u00edstico de las c\u00e9lulas eucariotas, y la ventaja evolutiva principal que posee es la habilidad para seleccionar diferentes combinaciones de exones, lo cual incrementa la diversidad de expresi\u00f3n g\u00e9nica. El proceso a trav\u00e9s del cual, obtenemos una secuencia de ARNm sin intrones, desde una secuencia de pre-ARN, que es copia exacta del ADN, es conocido como splicing. La maquinaria ribonucleoprot\u00e9ica encargada de dicha funci\u00f3n se conoce como <strong>spliceosoma<\/strong>. <\/p>\n\n\n\n<p>Existen principalmente 2, el spliceosoma mayor y el spliceosoma menor. Se trata de una maquinaria modulada por m\u00faltiples mecanismos, entre ellos los activadores (enhacers) y silenciadores (silencers). La acci\u00f3n de dichos moduladores da lugar a un fen\u00f3meno conocido como <strong>splicing alternativo<\/strong>, de forma que un mismo gen puede dar lugar a productos proteicos distintos en funci\u00f3n de las circustancias. Seg\u00fan las estimaciones actuales, alrededor del 15-50% de las mutaciones puntuales monog\u00e9nicas causantes de enfermedad afectar\u00edan al splicing del pre-ARN, con la mayor parte de ellas afectando a los puntos de uni\u00f3n de splicing (splice junctions).<\/p>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>Mecanismos patog\u00e9nicos de las mutaciones intr\u00f3nicas.<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<ul class=\"wp-block-list\">\n<li>Inclusi\u00f3n de pseudo-exones.<\/li>\n\n\n\n<li>Competici\u00f3n con los lugares naturales de splicing.<\/li>\n\n\n\n<li>Disrupci\u00f3n de elementos de regulaci\u00f3n de la transcripci\u00f3n.<\/li>\n\n\n\n<li>Inactivaci\u00f3n de ARN no codificantes.<\/li>\n\n\n\n<li>Reorganizaciones cromos\u00f3micas.<\/li>\n<\/ul>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>Enfermedades con mutaciones intr\u00f3nicas patog\u00e9nicas descritas en la literatura. <\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"553\" height=\"400\" src=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-6.png\" alt=\"\" class=\"wp-image-6467\" srcset=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-6.png 553w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-6-300x217.png 300w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-6-18x12.png 18w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"553\" height=\"375\" src=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-7.png\" alt=\"\" class=\"wp-image-6468\" srcset=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-7.png 553w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-7-300x203.png 300w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-7-18x12.png 18w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"553\" height=\"640\" src=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-8.png\" alt=\"\" class=\"wp-image-6469\" srcset=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-8.png 553w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-8-259x300.png 259w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-8-10x12.png 10w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"553\" height=\"213\" src=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-9.png\" alt=\"\" class=\"wp-image-6470\" srcset=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-9.png 553w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-9-300x116.png 300w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2023\/08\/imagen-9-18x7.png 18w\" sizes=\"(max-width: 553px) 100vw, 553px\" \/><\/figure>\n<\/div><\/details>\n<\/div>\n\n\n\n<div id=\"zotpress-c7852105ff0c37486cf70416188bab9d\" class=\"zp-Zotpress zp-Zotpress-Bib wp-block-group\">\n\n\t\t<span class=\"ZP_API_USER_ID ZP_ATTR\">332710<\/span>\n\t\t<span class=\"ZP_ITEM_KEY ZP_ATTR\">{332710:RI6TWRHS},{332710:7RSEKJJB}<\/span>\n\t\t<span class=\"ZP_COLLECTION_ID ZP_ATTR\"><\/span>\n\t\t<span class=\"ZP_TAG_ID ZP_ATTR\"><\/span>\n\t\t<span class=\"ZP_AUTHOR 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id=\"zp-ID-2839-332710-RI6TWRHS\" data-zp-author-date='Vaz-Drago-et-al.-2017' data-zp-date-author='2017-Vaz-Drago-et-al.' data-zp-date='2017' data-zp-year='2017' data-zp-itemtype='journalArticle' class=\"zp-Entry zpSearchResultsItem\">\n<div class=\"csl-bib-body\" style=\"line-height: 1.35; \">\n  <div class=\"csl-entry\" style=\"clear: left; \">\n    <div class=\"csl-left-margin\" style=\"float: left; padding-right: 0.5em; text-align: right; width: 1em;\">1.<\/div><div class=\"csl-right-inline\" style=\"margin: 0 .4em 0 1.5em;\">Vaz-Drago R, Cust\u00f3dio N, Carmo-Fonseca M. Deep intronic mutations and human disease. Hum Genet [Internet]. 2017 [cited 2020 May 3];136(9):1093\u2013111. Available from: <a class='zp-ItemURL' href='http:\/\/link.springer.com\/10.1007\/s00439-017-1809-4'>http:\/\/link.springer.com\/10.1007\/s00439-017-1809-4<\/a><\/div>\n  <\/div>\n<\/div>\n\t\t\t\t<\/div><!-- .zp-Entry .zpSearchResultsItem -->\t\t\t\t<div id=\"zp-ID-2839-332710-7RSEKJJB\" data-zp-author-date='Anna-and-Monika-2018' data-zp-date-author='2018-Anna-and-Monika' data-zp-date='2018' data-zp-year='2018' data-zp-itemtype='journalArticle' class=\"zp-Entry zpSearchResultsItem\">\n<div class=\"csl-bib-body\" style=\"line-height: 1.35; \">\n  <div class=\"csl-entry\" style=\"clear: left; \">\n    <div class=\"csl-left-margin\" style=\"float: left; padding-right: 0.5em; text-align: right; width: 1em;\">1.<\/div><div class=\"csl-right-inline\" style=\"margin: 0 .4em 0 1.5em;\">Anna A, Monika G. Splicing mutations in human genetic disorders: examples, detection, and confirmation. J Appl Genetics [Internet]. 2018 [cited 2021 July 12];59(3):253\u201368. Available from: <a class='zp-ItemURL' href='http:\/\/link.springer.com\/10.1007\/s13353-018-0444-7'>http:\/\/link.springer.com\/10.1007\/s13353-018-0444-7<\/a><\/div>\n  <\/div>\n<\/div>\n\t\t\t\t<\/div><!-- .zp-Entry .zpSearchResultsItem -->\n\t\t\t<\/div><!-- .zp-zp-SEO-Content -->\n\t\t<\/div><!-- .zp-List -->\n\t<\/div><!--.zp-Zotpress-->\n\n\n","protected":false},"excerpt":{"rendered":"<p>La secuenciaci\u00f3n masiva del exoma, como estrategia m\u00e1s coste-eficiente en el diagn\u00f3stico gen\u00e9tico de las enfermedades monogen\u00e9ticas mendelianas, tiene una limitaci\u00f3n impuesta por su propio dise\u00f1o: no incluye la secuenciaci\u00f3n de las regiones intr\u00f3nicas. Ya es posible realizar la secuenciaci\u00f3n masiva de todo el genoma, pero sin embargo, las tecnolog\u00edas bioinform\u00e1ticas y la acumulaci\u00f3n cient\u00edfica &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/neuropediatoolkit.org\/en\/mutaciones-intronicas-profundas\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> \u00abMutaciones intr\u00f3nicas profundas.\u00bb<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":2840,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-2839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-neurogenetica","entry"],"_links":{"self":[{"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/posts\/2839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/comments?post=2839"}],"version-history":[{"count":1,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/posts\/2839\/revisions"}],"predecessor-version":[{"id":6479,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/posts\/2839\/revisions\/6479"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/media\/2840"}],"wp:attachment":[{"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/media?parent=2839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/categories?post=2839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/en\/wp-json\/wp\/v2\/tags?post=2839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}