
{"id":57697,"date":"2018-02-13T11:10:22","date_gmt":"2018-02-13T10:10:22","guid":{"rendered":"http:\/\/ibecbarcelona.eu\/?p=57697"},"modified":"2018-02-13T11:32:49","modified_gmt":"2018-02-13T10:32:49","slug":"loxidacio-es-necessaria-per-a-la-recuperacio-despres-duna-lesio-medul%c2%b7lar","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/loxidacio-es-necessaria-per-a-la-recuperacio-despres-duna-lesio-medul%c2%b7lar\/","title":{"rendered":"L&#8217;oxidaci\u00f3 \u00e9s necess\u00e0ria per a la recuperaci\u00f3 despr\u00e9s d&#8217;una lesi\u00f3 medul\u00b7lar"},"content":{"rendered":"<h6 class=\"caption\" style=\"float: left; width: 30%; padding: 0px 30px 10px 0px;\">Arnau Hervera y Jos\u00e9 Antonio del R\u00edo<\/h6>\n<p>que envia als macr\u00f2fags a netejar l&#8217;\u00e0rea danyada; a m\u00e9s, tamb\u00e9 es produeixen alts nivells d&#8217;oxidaci\u00f3, que causen danys en la membrana i en l&#8217;ADN d&#8217;algunes neurones -i fins i tot la mort d&#8217;algunes c\u00e8l\u00b7lules.<\/p>\n<p>Malgrat que en principi tot podria fer pensar que inhibint la resposta inflamat\u00f2ria i oxidant despr\u00e9s d&#8217;una lesi\u00f3 s&#8217;evitarien els danys secundaris d&#8217;aquest proc\u00e9s, investigadors de l&#8217;Institut de Bioenginyeria de Catalunya (IBEC) en col\u00b7laboraci\u00f3 amb l\u2019Imperial College London han descobert que el proc\u00e9s oxidatiu pot contribuir a promoure la regeneraci\u00f3 d&#8217;axons (prolongaci\u00f3 de la neurona) despr\u00e9s d&#8217;una lesi\u00f3 nerviosa.<\/p>\n<p>En un estudi amb ratolins, el Dr. Arnau Hervera, primer autor de l&#8217;estudi, i el Prof. Jos\u00e9 Antonio del R\u00edo, tots dos de l\u2019IBEC, en col\u00b7laboraci\u00f3 amb el laboratori del Prof. Simone Di Giovanni de l&#8217;Imperial College London, van investigar el mecanisme que intervenia a la regeneraci\u00f3 despr\u00e9s de lesions medul\u00b7lars. Per a aix\u00f2, van sotmetre primer als animals a <em>lesions nervioses condicionants<\/em>, conegudes des dels anys setanta per contribuir a la regeneraci\u00f3 en lesions posteriors, per\u00f2 els mecanismes de les quals encara no estan esclarits. \u201cQuan hi ha una primera lesi\u00f3 lleu en el sistema nervi\u00f3s, la recuperaci\u00f3 despr\u00e9s d&#8217;una lesi\u00f3 aguda \u00e9s m\u00e9s efectiva. Podr\u00edem pensar en un mecanisme semblant al que causen les vacunes, \u00e9s a dir, com una mem\u00f2ria cel\u00b7lular\u201d, comenta l\u2019Arnau Hervera.<\/p>\n<p>El grup de recerca es va focalitzar a entendre el mecanisme que hi havia darrere d&#8217;aquesta primera lesi\u00f3 nerviosa condicional. Durant aquest proc\u00e9s, es produeixen alts nivells d&#8217;oxidaci\u00f3 -o esp\u00e8cies oxidants reactives (EOR)-.<\/p>\n<p>\u201cEns vam adonar que les esp\u00e8cies oxidants reactives (EOR) sempre acompanyaven a la regeneraci\u00f3 despr\u00e9s de les lesions condicionals. Per aquest motiu vam decidir simular la lesi\u00f3 simplement alliberant aquestes EOR prop de la zona danyada\u201d, explica l\u2019Arnau Hervera.<\/p>\n<p>Per a simular l&#8217;efecte regeneratiu de la lesi\u00f3 condicional, van administrar un tipus d\u2019EOR (aigua oxigenada) en el nervi ci\u00e0tic d&#8217;un grup de ratolins. Davant una lesi\u00f3 medul\u00b7lar posterior, i despr\u00e9s de quatre setmanes, els ratolins sotmesos al tractament amb EOR van mostrar millores funcionals. \u201cUna lesi\u00f3 condicional mai seria d&#8217;utilitat terap\u00e8utica, per\u00f2 si aconseguim entendre els mecanismes que hi ha darrere -b\u00e0sicament com funciona aquesta oxidaci\u00f3-, podrem controlar i millorar la regeneraci\u00f3 despr\u00e9s de lesions medul\u00b7lars\u201d, comenta el Prof. del R\u00edo, investigador principal a l\u2019IBEC i a l&#8217;Institut de Neuroci\u00e8ncies de la UB, a m\u00e9s de catedr\u00e0tic de la UB.<\/p>\n<p>En la seva cerca del mecanisme responsable d&#8217;aquesta oxidaci\u00f3 via les EOR, els investigadors van identificar als macr\u00f2fags (c\u00e8l\u00b7lules immunes t\u00edpicament associades a processos inflamatoris) com els responsables de la senyalitzaci\u00f3 necess\u00e0ria mitjan\u00e7ant EOR en les neurones danyades per promoure la regeneraci\u00f3 dels axons lesionats.<\/p>\n<p>Aquest descobriment podria inspirar la creaci\u00f3 de noves ter\u00e0pies regeneratives, que promoguessin la recuperaci\u00f3 despr\u00e9s de lesions nervioses o medul\u00b7lars regulant la senyalitzaci\u00f3 de les EOR. \u201cLa soluci\u00f3 seria modular la resposta oxidant i inflamat\u00f2ria del cos en comptes de bloquejar-la, com es fa actualment\u201d, afegeix l\u2019Arnau Hervera. \u201cEls nostres descobriments q\u00fcestionen l&#8217;efic\u00e0cia de l&#8217;\u00fas indiscriminat que fem avui dia de les ter\u00e0pies antioxidants i antiinflamat\u00f2ries davant lesions nervioses, ja que tenim moltes evid\u00e8ncies de la necessitat de tenir una resposta immune que participi en el proc\u00e9s de regeneraci\u00f3\u201d, comenta el Prof. Di Giovanni, responsable de la recerca.<\/p>\n<p>Aquesta recerca ha estat finan\u00e7ada per Leverhulme Trust, Wings for Life i l&#8217;Imperial College London.<\/p>\n<p><strong>Article referenciat:<\/strong> A. Hervera, F. De Virgiliis, I. Palmisano, L. Zhou, E. Tantardini, G. Kong, T. Hutson, M. C. Danzi, R. Ben-Tov Perry, C. X. C. Santos, A. N. Kapustin, R. A. Fleck, J. A. Del R\u00edo, T. Carroll, V. Lemmon, J. L. Bixby, A. M. Shah, M. Fainzilber and S. Di Giovanni (2018). Reactive oxygen species regulate axonal regeneration through the release of exosomal NADPH2 oxidase complexes into injured axons. Nature Cell Biology, pub ahead of print<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" data-src=\"https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2018\/02\/NatureCB_Arnau-Hervera_Jose-Antonio-del-Rio_web.jpg\" alt=\"\" width=\"550\" height=\"164\" class=\"left size-full wp-image-57625 lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 550px; --smush-placeholder-aspect-ratio: 550\/164;\" \/><\/p>\n<h3>Un grup de recerca de l&#8217;IBEC, en col\u00b7laboraci\u00f3 amb l&#8217;Imperial College London, ha descobert que esp\u00e8cies oxidants regulen la regeneraci\u00f3 de les neurones danyades despr\u00e9s d&#8217;una lesi\u00f3 medul\u00b7lar.<\/h3>\n<p>Antiinflamatoris i antioxidants. Ara com ara, aquest \u00e9s el tractament que reben els afectats per una lesi\u00f3 nerviosa o medul\u00b7lar per mitigar els danys. Despr\u00e9s d&#8217;una lesi\u00f3 en un nervi, es produeix una inflamaci\u00f3 i s&#8217;activa el sistema immune<\/p>\n","protected":false},"author":4,"featured_media":57689,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[407,158,539,403,405,404],"post_formats":[],"class_list":["post-57697","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca","tag-arnau-hervera","tag-ibec-ca","tag-ibec-es-ca","tag-lesio-medular","tag-nature-cell-biology","tag-oxidacio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L&#039;oxidaci\u00f3 \u00e9s necess\u00e0ria per a la recuperaci\u00f3 despr\u00e9s d&#039;una lesi\u00f3 medul\u00b7lar - Institute for Bioengineering of Catalonia<\/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:\/\/ibecbarcelona.eu\/ca\/loxidacio-es-necessaria-per-a-la-recuperacio-despres-duna-lesio-medul\u00b7lar\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L&#039;oxidaci\u00f3 \u00e9s necess\u00e0ria per a la recuperaci\u00f3 despr\u00e9s d&#039;una lesi\u00f3 medul\u00b7lar - Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"og:description\" content=\"Un grup de recerca de l&#039;IBEC, en col\u00b7laboraci\u00f3 amb l&#039;Imperial College London, ha descobert que esp\u00e8cies oxidants regulen la regeneraci\u00f3 de les neurones danyades despr\u00e9s d&#039;una lesi\u00f3 medul\u00b7lar.Antiinflamatoris i antioxidants. 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