{"id":1249,"date":"2019-12-09T15:53:58","date_gmt":"2019-12-09T15:53:58","guid":{"rendered":"http:\/\/192.168.0.72\/?p=1249"},"modified":"2019-12-16T21:50:16","modified_gmt":"2019-12-16T21:50:16","slug":"las-nanoparticulas-ultrapequenas-matan-las-celulas-cancerosas-de-manera-inusual","status":"publish","type":"post","link":"https:\/\/site.hsr.gob.pe\/?p=1249","title":{"rendered":"Las nanopart\u00edculas ultrapeque\u00f1as matan las c\u00e9lulas cancerosas de manera inusual"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-bottom: 0px;margin-top: 0px;border-width: 0px 0px 0px 0px;border-color:#eae9e9;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"margin-top:0px;margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-1\" style=\"transform:translate3d(0,0,0);\"><div class=\"td-post-header td-pb-padding-side\">\n<header>\n<div class=\"meta-info\"><\/div>\n<\/header>\n<\/div>\n<div class=\"td-post-content td-pb-padding-side\">\n<div class=\"td-post-featured-image\"><a href=\"http:\/\/isanidad.com\/wp-content\/uploads\/2016\/09\/nenoparticulas.jpg\" data-caption=\"\"><img decoding=\"async\" class=\"wp-image-1250 aligncenter\" src=\"https:\/\/site.hsr.gob.pe\/wp-content\/uploads\/2019\/12\/laboratory2-1170x573.jpg\" alt=\"\" width=\"580\" height=\"284\" \/><\/a><\/div>\n<\/div>\n<\/div><div class=\"fusion-text fusion-text-2\" style=\"transform:translate3d(0,0,0);\"><div class=\"td-post-header td-pb-padding-side\" style=\"text-align: justify;\"><span style=\"text-align: justify;\">Los cient\u00edficos se sorprendieron al encontrar que unas nanopart\u00edculas ultra peque\u00f1as y fluorescentes &#8211; originalmente desarrolladas para iluminar los tumores para la cirug\u00eda &#8211; tambi\u00e9n pueden matar a las c\u00e9lulas cancerosas mediante la activaci\u00f3n de un tipo de muerte celular que no se observa f\u00e1cilmente.<\/span><\/div>\n<div class=\"td-post-content td-pb-padding-side\">\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><br \/>\n<span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">El descubrimiento &#8211; y c\u00f3mo probar las nanopart\u00edculas en cultivos celulares y ratones &#8211; est\u00e1 publicado en la revista\u00a0 <\/span><\/span><\/span><\/span><i><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Nature Nanotechnology<\/span><\/span><\/span><\/span><\/i><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><br \/>\n<span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Uno de los principales investigadores, Ulrich Wiesner, profesor de ingenier\u00eda en la Universidad de Cornell en Ithaca, Nueva York, dice: <\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><br \/>\n<span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Si se trata de una nanopart\u00edcula para matar el c\u00e1ncer, ser\u00eda exactamente la manera en que se har\u00eda<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Las nanopart\u00edculas son part\u00edculas diminutas de una dimensi\u00f3n no mayor de 100 nan\u00f3metros. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Tienen propiedades inusuales en comparaci\u00f3n con el mismo material a una escala m\u00e1s grande, y los cient\u00edficos e ingenieros est\u00e1n aplicando en muchos campos, incluyendo la electr\u00f3nica y la biomedicina.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Las nanopart\u00edculas del nuevo estudio &#8211; llamadas puntos de Cornell, o puntos C &#8211; son part\u00edculas de s\u00edlice fluorescentes ultra peque\u00f1as, con un di\u00e1metro de 5 nan\u00f3metros.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Fueron desarrolladas originalmente por el profesor Wiesner hace m\u00e1s de 10 a\u00f1os como una herramienta para la cirug\u00eda del c\u00e1ncer. <\/span><\/span><\/span><\/span><\/span><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Se adhieren a las c\u00e9lulas cancerosas y las iluminan, a los cirujanos ver d\u00f3nde tienen que cortar.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Las part\u00edculas tambi\u00e9n fueron utilizadas a ser utilizadas para la administraci\u00f3n dirigida de f\u00e1rmacos.<\/span><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><b><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Propiedades terap\u00e9uticas intr\u00ednsecas<\/span><\/span><\/span><\/span><\/span><\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">El nuevo estudio muestra que los puntos de Cornell dirigidos al c\u00e1ncer pueden matar a las c\u00e9lulas cancerosas sin tener que llevar medicamentos. <\/span><\/span><\/span><br \/>\n<span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">La autora directora, Michelle Bradbury, directora de imagen intraoperatoria en el\u00a0 <\/span><\/span><i><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Memorial Sloan Kettering Cancer Center<\/span><\/span><\/i><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00a0de Nueva York, Nueva York, se\u00f1ala:<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00abDe hecho, esta es la primera vez que hemos detectado que la part\u00edcula tiene propiedades terap\u00e9uticas intr\u00ednsecas\u00bb.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00abLa part\u00edcula es bien tolerada en un tejido saludable\u00bb, explica el Prof. Wiesner, \u00bb <\/span><\/span><i><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">estilo =\u00bb vertical-pero en cuanto se tiene un tumor, y bajo condiciones muy espec\u00edficas, estas part\u00edculas se requieren en asesinas<\/span><\/span><\/i><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> \u00ab.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Los investigadores descubrieron las propiedades de los puntos de Cornell para combatir el c\u00e1ncer cuando estaban tratando de descubrir c\u00f3mo podr\u00edan sufrir ser toleradas grandes. <\/span><span style=\"vertical-align: inherit;\">Se enfrentaron a varios experimentos durante varios a\u00f1os.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Entonces, para su sorpresa, descubrieron que cuando las altas dosis de puntos de Cornell recubiertos de p\u00e9ptidos fueron incubadas con c\u00e9lulas de c\u00e1ncer &#8211; y en particular cuando las c\u00e9lulas fueron privadas de nutrientes &#8211; las part\u00edculas tomaron hierro del medio ambiente y lo suministraron a las c\u00e9lulas cancerosas<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">La entrega de hierro a las c\u00e9lulas desencadena un tipo de muerte celular llamada ferroptosis, que rompe la membrana celular, que es diferente a la muerte celular por fragmentaci\u00f3n m\u00e1s observada conocida como apoptosis.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><b><span style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u00abOla de destrucci\u00f3n\u00bb<\/span><\/span><\/span><\/b><br \/>\n<span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"> El Prof. Wiesner dice que solo 24-48 horas despu\u00e9s de la exposici\u00f3n a los puntos de Cornell, observa c\u00f3mo se puede \u00abextender la ola de destrucci\u00f3n\u00bb por todo el cultivo de c\u00e9lulas de c\u00e1ncer.<\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">En otros experimentos se inyectan dosis altas de los puntos de Cornell recubiertos en ratones inyectados con tumores de melanoma y se detectan que se redujeron los tumores sin causar reacciones adversas.<\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Los autores concluyen sus hallazgos encontrados que la ferroptosis puede ser dirigida con nanopart\u00edculas de s\u00edlice ultra peque\u00f1as y puede tener un potencial terap\u00e9utico \u201d.<\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">\u201c <\/span><\/span><i><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Hemos encontrado otra herramienta en la que la gente no hab\u00eda pensado en absoluto hasta ahora. <\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">, dijo el Prof. Ulrich Wiesner.<\/span><\/span><\/span><\/i><\/p>\n<p style=\"text-align: justify;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Los investigadores ahora planean probar c\u00f3mo funcionan los puntos de Cornell con otras terapias est\u00e1ndar en diferentes tipos de tumores. <\/span><\/span><\/span><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">Quieren que sean m\u00e1s frecuentes antes de comenzar las pruebas en seres humanos.<\/span><\/span><\/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;\">El equipo tambi\u00e9n estar\u00e1 explorando formas de adaptar las part\u00edculas para dirigirse a tipos espec\u00edficos de c\u00e1ncer. <\/span><\/span><\/span><\/span><br \/>\n<i><b><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\"><span style=\"vertical-align: inherit;\">..HSR<\/span><\/span><\/span><\/span><\/b><\/i><\/p>\n<\/div>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_1249\" class=\"pvc_stats all  \" data-element-id=\"1249\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 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