{"id":1636,"date":"2021-10-12T14:17:32","date_gmt":"2021-10-12T14:17:32","guid":{"rendered":"https:\/\/elciudadanodelujan.com.ar\/?p=1636"},"modified":"2021-10-12T14:17:52","modified_gmt":"2021-10-12T14:17:52","slug":"un-fosil-de-hace-125-millones-de-anos-podria-contener-adn-de-dinosaurio-bien-conservado","status":"publish","type":"post","link":"https:\/\/elciudadanodelujan.com.ar\/?p=1636","title":{"rendered":"Un f\u00f3sil de hace 125 millones de a\u00f1os podr\u00eda contener ADN de dinosaurio bien conservado"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>El hallazgo del f\u00e9mur de un&nbsp;<\/strong><strong><em>Caudipteryx<\/em><\/strong><strong>&nbsp;podr\u00eda contener las primeras biomol\u00e9culas y restos de ADN de dinosaurio encontrados por la ciencia.<\/strong><\/h2>\n\n\n\n<p>A inicios del Cret\u00e1cico, un dinosaurio carn\u00edvoro del tama\u00f1o de un pavorreal que pose\u00eda una cola emplumada y 70 cent\u00edmetros de altura llamado&nbsp;<strong><em>Caudipteryx<\/em><\/strong>&nbsp;habitaba el noreste de China. 125 millones de a\u00f1os despu\u00e9s, el hallazgo de los restos f\u00f3siles de un ejemplar perfectamente conservado podr\u00eda arrojar las<strong>&nbsp;primeras muestras de ADN de dinosaurio<\/strong>&nbsp;en la historia.<\/p>\n\n\n\n<p>El ejemplar fue encontrado en el&nbsp;<strong>grupo de Jehol<\/strong>, un conjunto de yacimientos paleontol\u00f3gicos del Cret\u00e1cico inferior ubicado al noreste de China y rico en<strong>&nbsp;restos f\u00f3siles<\/strong>&nbsp;de especies que habitaron la Tierra hace 125 millones de a\u00f1os, donde los \u00faltimos a\u00f1os se han producido hallazgos claves de animales prehist\u00f3ricos.<\/p>\n\n\n\n<p>A diferencia de otros yacimientos similares, los f\u00f3siles de Jehol suelen mantenerse excepcionalmente preservados, debido a \u00ablas<strong>&nbsp;finas cenizas volc\u00e1nicas<\/strong>&nbsp;que sepultaron los cad\u00e1veres y los preservaron hasta el nivel celular\u00bb, explic\u00f3 Li Zhiheng, coautor del estudio en un comunicado.<\/p>\n\n\n\n<p>n el caso del&nbsp;<em>Caudipteryx,&nbsp;<\/em>un equipo integrado por la<a rel=\"noreferrer noopener\" href=\"https:\/\/www.nature.com\/articles\/s42003-021-02627-8\" target=\"_blank\">&nbsp;Academia China de Ciencias<\/a>&nbsp;y el Museo de la Naturaleza de Tianyu explor\u00f3 los restos del f\u00e9mur derecho del ejemplar y tras distintas pruebas, descubrieron que algunas de sus c\u00e9lulas hab\u00edan sido&nbsp;<strong>mineralizadas por silicificaci\u00f3n<\/strong>, lo que permiti\u00f3 su \u00abexcelente conservaci\u00f3n\u00bb al cabo de milenios.<\/p>\n\n\n\n<p>El equipo aisl\u00f3 algunas c\u00e9lulas que estaban sanas al momento de la fosilizaci\u00f3n y las ti\u00f1\u00f3 con hematoxilina, una sustancia utilizada ampliamente en la hematolog\u00eda para identificar distintos tipos de c\u00e9lulas y sus tejidos. Para su sorpresa, encontraron c\u00e9lulas con n\u00facleos que a\u00fan conservan biomol\u00e9culas e hilos de&nbsp;<strong>cromatina<\/strong>, el material del que est\u00e1n hechos los cromosomas formado por<strong>&nbsp;ADN y prote\u00ednas<\/strong>.<\/p>\n\n\n\n<p>Los&nbsp;<strong>restos de ADN<\/strong>&nbsp;se encuentran con mayor facilidad en los<strong>&nbsp;tejidos blandos<\/strong>&nbsp;de los seres vivos, como los \u00f3rganos, grasa, m\u00fasculos o nervios. Sin embargo, a diferencia de los constantes hallazgos de&nbsp;<strong>f\u00f3siles<\/strong>&nbsp;que se componen de huesos, dientes y cr\u00e1neos de dinosaurio (las partes duras de un ser vivo), los restos blandos<strong>&nbsp;se descomponen r\u00e1pidamente<\/strong>, incapaces de perdurar a trav\u00e9s del tiempo.<\/p>\n\n\n\n<p>Las investigaciones m\u00e1s recientes estiman que las mol\u00e9culas de ADN se desintegran por completo despu\u00e9s de unos 7 millones de a\u00f1os. De ah\u00ed que a\u00fan con las t\u00e9cnicas m\u00e1s avanzadas, hoy resulte&nbsp;<strong>imposible obtener muestras del c\u00f3digo gen\u00e9tico<\/strong>&nbsp;de dinosaurios que dominaron la Tierra hace 65 millones de a\u00f1os.<\/p>\n\n\n\n<p>Aunque se trata de datos preliminares, los cient\u00edficos consideran que el descubrimiento demuestra que no todos los f\u00f3siles son completamente restos petrificados; sino que en algunos casos, tal vez sea posible encontrar algunos<strong>&nbsp;remanentes de mol\u00e9culas org\u00e1nicas.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"770\" height=\"434\" src=\"https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-dinosaurio.jpeg\" alt=\"\" class=\"wp-image-1637\" srcset=\"https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-dinosaurio.jpeg 770w, https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-dinosaurio-300x169.jpeg 300w, https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-dinosaurio-768x433.jpeg 768w\" sizes=\"auto, (max-width: 770px) 100vw, 770px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"987\" height=\"669\" src=\"https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-de-dinosaurio-2.jpeg\" alt=\"\" class=\"wp-image-1638\" srcset=\"https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-de-dinosaurio-2.jpeg 987w, https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-de-dinosaurio-2-300x203.jpeg 300w, https:\/\/elciudadanodelujan.com.ar\/wp-content\/uploads\/2021\/10\/ADN-de-dinosaurio-2-768x521.jpeg 768w\" sizes=\"auto, (max-width: 987px) 100vw, 987px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>El hallazgo del f\u00e9mur de un&nbsp;Caudipteryx&nbsp;podr\u00eda contener las primeras biomol\u00e9culas y restos de ADN de dinosaurio encontrados por la ciencia. A inicios del Cret\u00e1cico, un dinosaurio carn\u00edvoro del tama\u00f1o de&hellip; <\/p>\n","protected":false},"author":2,"featured_media":1638,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Un f\u00f3sil de hace 125 millones de a\u00f1os podr\u00eda contener ADN de dinosaurio bien conservado -<\/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:\/\/elciudadanodelujan.com.ar\/?p=1636\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un f\u00f3sil de hace 125 millones de a\u00f1os podr\u00eda contener ADN de dinosaurio bien conservado -\" \/>\n<meta property=\"og:description\" content=\"El hallazgo del f\u00e9mur de un&nbsp;Caudipteryx&nbsp;podr\u00eda contener las primeras biomol\u00e9culas y restos de ADN de dinosaurio encontrados por la ciencia. 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