
{"id":7942,"date":"2013-12-01T18:00:00","date_gmt":"2013-12-01T18:00:00","guid":{"rendered":"http:\/\/ibecbarcelona.eu\/new\/la-pell-forma-ponts-penjants-per-afavorir-la-cicatritzacio-de-ferides\/"},"modified":"2015-01-08T09:45:59","modified_gmt":"2015-01-08T09:45:59","slug":"la-pell-forma-ponts-penjants-per-afavorir-la-cicatritzacio-de-ferides","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/la-pell-forma-ponts-penjants-per-afavorir-la-cicatritzacio-de-ferides\/","title":{"rendered":"La pell forma &#8216;ponts penjants&#8217; per afavorir la cicatritzaci\u00f3 de ferides"},"content":{"rendered":"<p>Un nou estudi sobre la mec\u00e0nica del teixit epitelial (de la pell) s&#8217;ha publicat avui en la revista Nature Materials. L&#8217;estudi demostra com les capes de queratinocits humans (les c\u00e8l\u2022lules m\u00e9s externes de la pell) formen estructures similars a ponts penjants sobre les ferides que afavoreixen el proc\u00e9s de cicatritzaci\u00f3.<\/p>\n<p>Cient\u00edfics de l&#8217;Institut de Bioenginyeria de Catalunya (IBEC)i els seus col\u2022laboradors de l&#8217;Institut de Mecanobiologia de la Universitat nacional de Singapur han utilitzat tecnologia de microfabricaci\u00f3 &#8211; generaci\u00f3 d&#8217;estructures en miniatura a escala microm\u00e8trica &#8211; per observar com migren les c\u00e8l\u2022lules de la pell per reparar les ferides.<\/p>\n<p>A trav\u00e9s d&#8217;aquesta t\u00e8cnica s&#8217;ha demostrat que aquestes regions, que no tenen el suport d&#8217;una matriu extracel\u2022lular i que no s\u00f3n propicies per a l&#8217;adhesi\u00f3 cel\u2022lular, s\u00f3n abastades per &#8220;ponts&#8221; multicel\u2022L\u00a1ulars formats per l\u00e0mines de queratinocits. D&#8217;aquesta manera, les c\u00e8l\u2022lules migrat\u00f2ries de la pell s\u00f3n capaces de continuar avan\u00e7ant com a unitat i grup homogeni, per formar una barrera protectora per sobre de la ferida.<\/p>\n<p>\u201cAquests ponts s\u00f3n un nou descobriment, ja que pr\u00e8viament es creia que aquest proc\u00e9s de reepitealitzaci\u00f3 &#8211; de restauraci\u00f3 de la pell a una ferida o cremada &#8211; requeria un &#8216;punt de suport&#8217; per tal que cada c\u00e8l\u2022lula d&#8217;una l\u00e0mina epitelial pogu\u00e9s migrar&#8221;, explica Xavier Trepat, investigador principal de l&#8217;IBEC. &#8220;En lloc d&#8217;aix\u00f2, sembla ser que les c\u00e8l\u2022lules poden estendre un pont per sobre de la ferida i arrossegar les l\u00e0mines suspeses a trav\u00e9s d&#8217;ell.&#8221;<\/p>\n<p>L&#8217;estudi, que ha estat liderat per Lim Chwee Teck i Benoit Ladoux de Singapur, demostra que aquesta l\u00e0mina de c\u00e8l\u2022lules suspeses es propulsa gr\u00e0cies a forces generades per un sistema d&#8217;actina i miosina, una mena de prote\u00efnes motores que pot causar la contracci\u00f3 cel\u2022lular. Els investigadors han descobert que la l\u00e0mina t\u00e9 un comportament el\u00e0stic en lloc del comportament fluid m\u00e9s caracter\u00edstic d&#8217;altres tipus cel\u2022lulars, el que d&#8217;alguna manera explica la seva habilitat per formar ponts penjants multicel\u2022lulars.<\/p>\n<p>\u201cEl nostre estudi facilitar\u00e0 el cam\u00ed per dissenyar millors alternatives de reparaci\u00f3 i de regeneraci\u00f3 de teixits que ajudaran a solucionar les limitacions actuals de l&#8217;enginyeria de teixits i promouran les regeneracions epitelials,&#8221; afegeix Benoit Ladoux. \u201cEntre les aplicacions potencials s&#8217;inclou el tractament de cremades, de determinades malalties de la pell i de problemes associats a l&#8217;envelliment com les \u00falceres, a m\u00e9s a m\u00e9s d&#8217;ajudar-nos a descriure les propietats mec\u00e0niques de les l\u00e0mines cel\u2022lulars.\u201d<\/p>\n<p>&#8212;<\/p>\n<p><strong>Article de refer\u00e8ncia: <\/strong>Sri Ram Krishna Vedula, Hiroaki Hirata, Mui Hoon Nai, Agust\u00ed Brug\u00e9s, Yusuke Toyama, Xavier Trepat, Chwee Teck Lim, Benoit Ladoux (2013). Epithelial bridges maintain tissue integrity during collective cell migration. <em>Nature Materials<\/em>, in press<\/p>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<h3><img decoding=\"async\" class=\"left size-full wp-image-7938 lazyload\" data-src=\"https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2013\/12\/natmatbridges340_210.jpg\" border=\"0\" width=\"340\" height=\"210\" data-srcset=\"https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2013\/12\/natmatbridges340_210.jpg 340w, https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2013\/12\/natmatbridges340_210-300x185.jpg 300w, https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2013\/12\/natmatbridges340_210-242x150.jpg 242w, https:\/\/ibecbarcelona.eu\/wp-content\/uploads\/2013\/12\/natmatbridges340_210-150x92.jpg 150w\" data-sizes=\"(max-width: 340px) 100vw, 340px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 340px; --smush-placeholder-aspect-ratio: 340\/210;\" \/>Els resultats obtinguts pels investigadors de l&#8217;IBEC i els seus col\u2022laboradors faciliten el cam\u00ed per aconseguir una cicatritzaci\u00f3 de ferides millor i m\u00e9s r\u00e0pida, a m\u00e9s a m\u00e9s d&#8217;obrir noves vies d&#8217;investigaci\u00f3 en l&#8217;enginyeria de teixits de la pell.<\/h3>\n","protected":false},"author":4,"featured_media":7938,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[],"post_formats":[],"class_list":["post-7942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La pell forma &#039;ponts penjants&#039; per afavorir la cicatritzaci\u00f3 de ferides - 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\/la-pell-forma-ponts-penjants-per-afavorir-la-cicatritzacio-de-ferides\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La pell forma &#039;ponts penjants&#039; 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