{"id":31218,"date":"2017-09-12T10:56:57","date_gmt":"2017-09-12T08:56:57","guid":{"rendered":"http:\/\/ibecbarcelona.eu\/?p=31218\/"},"modified":"2018-05-22T09:47:24","modified_gmt":"2018-05-22T07:47:24","slug":"descobreixen-un-nou-tipus-dones-mecaniques-que-emergeixen-de-la-col%c2%b7lisio-entre-cel%c2%b7lules","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/descobreixen-un-nou-tipus-dones-mecaniques-que-emergeixen-de-la-col%c2%b7lisio-entre-cel%c2%b7lules\/","title":{"rendered":"Descobreixen un nou tipus d’ones mec\u00e0niques que emergeixen de la col\u00b7lisi\u00f3 entre c\u00e8l\u00b7lules"},"content":{"rendered":"
D’esquerra a dreta els investigadors del grup Integrative Cell and Tissue Dynamics<\/em> de l’IBEC: Xavier Trepat, Raimon Sunyer i Pilar Rodr\u00edguez.<\/h6>\n

La propagaci\u00f3 d’ones mec\u00e0niques, com les ones s\u00edsmiques, el so, o les ones del mar, \u00e9s un dels fen\u00f2mens m\u00e9s ben explicats per les lleis de la f\u00edsica. Aquestes mateixes lleis prediuen que les c\u00e8l\u00b7lules del nostre cos no haurien de propagar ones mec\u00e0niques perqu\u00e8 en ser molt lleugeres i viscoses, com la mel, haurien d’atenuar r\u00e0pidament qualsevol propagaci\u00f3. Contr\u00e0riament a aquest paradigma, un estudi realitzat per investigadors del\u00a0IBEC\u00a0mostra com de la col\u00b7lisi\u00f3 entre dos teixits cel\u00b7lulars emergeixen ones mec\u00e0niques que es propaguen.<\/p>\n

En aquest estudi, publicat recentment en la revista Nature\u00a0Materials, l’equip dirigit per Xavier\u00a0Trepat, professor investigador\u00a0ICREA\u00a0a l\u2019IBEC\u00a0i professor associat en la UB, ha mostrat com les c\u00e8l\u00b7lules s\u00f3n capaces de sostenir i transmetre aquestes ones mec\u00e0niques al llarg de dist\u00e0ncies superiors a un mil\u00b7l\u00edmetre -l’equivalent a tres-centes c\u00e8l\u00b7lules alineades una despr\u00e9s d’una altra. \u201cDespr\u00e9s de la col\u00b7lisi\u00f3, les c\u00e8l\u00b7lules transmeten informaci\u00f3 mec\u00e0nica col\u00b7lectivament, propagant una ona de deformaci\u00f3 com si fossin un material continu. \u00c9s la primera vegada que s’observa aquest comportament en teixits vius\u201d, comenta Pilar Rodr\u00edguez, recentment doctorada en el grup de Xavier\u00a0Trepat\u00a0i primera autora de l’estudi.<\/p>\n

Inicialment, els investigadors no buscaven aquestes ones: estudiaven les col\u00b7lisions entre teixits que expressaven diferents\u00a0efrinas, prote\u00efnes amb implicacions en el c\u00e0ncer de c\u00f2lon. Per a aix\u00f2 van establir una col\u00b7laboraci\u00f3 amb el grup d’Eduard\u00a0Batlle, del\u00a0IRB, tamb\u00e9 autor de l’article. \u201cEl c\u00e0ncer de c\u00f2lon pot comen\u00e7ar quan la barrera entre c\u00e8l\u00b7lules que expressen diferents\u00a0efrinas\u00a0deixa de funcionar b\u00e9, permetent que algunes c\u00e8l\u00b7lules no diferenciades envaeixin altres teixits i puguin formar un tumor\u201d, resumeix Pilar Rodr\u00edguez. Durant l’estudi de col\u00b7lisions entre c\u00e8l\u00b7lules que expressaven una\u00a0efrina\u00a0(Eph)\u00a0o una altra (ephrin), els investigadors van descobrir de forma inesperada que els teixits reaccionaven a la trobada transmetent ones mec\u00e0niques a banda i banda de la col\u00b7lisi\u00f3. <\/p>\n

<\/p>\n

Els panells A, B i C mostren en blau (velocitats positives) i vermell (velocitats negatives) la propagaci\u00f3 de les ones mec\u00e0niques despr\u00e9s de la col\u00b7lisi\u00f3 de teixits. El panell D mostra l’evoluci\u00f3 temporal dels fronts d’ona, que s’originen en el lloc de la col\u00b7lisi\u00f3 i se succeeixen durant m\u00e9s de 16 hores.<\/h6>\n

\u201cEs tracta d’un fenomen nou que no podr\u00edem haver-hi previst, doncs el marc te\u00f2ric actual no ho pot explicar\u201d, comenta Xavier\u00a0Trepat. \u201cL’estudi convida a revisar les propietats mec\u00e0niques que atribu\u00efm a les c\u00e8l\u00b7lules, i pot ser que a incorporar algunes noves. Hem d’entendre els sistemes vius com un nou estat de la mat\u00e8ria, al que cridem mat\u00e8ria activa\u201d, conclou\u00a0Trepat.\u00a0<\/p>\n

Els investigadors desconeixen la funci\u00f3 d’aquestes ones. \u201cEn biologia, les ones qu\u00edmiques solen encarregar-se de transmetre informaci\u00f3. \u00c9s possible que les c\u00e8l\u00b7lules utilitzin ones f\u00edsiques per compartir informaci\u00f3 sobre la seva distribuci\u00f3 a l’espai, o fins i tot que intervinguin en algunes etapes del desenvolupament embrionari\u201d, afegeix\u00a0Trepat. En un futur la comprensi\u00f3 d’aquestes ones f\u00edsiques podria ser de gran rellev\u00e0ncia en escenaris com el c\u00e0ncer o la formaci\u00f3 d’\u00f2rgans i teixits.<\/p>\n

L’estudi ha estat finan\u00e7at pel\u00a0MINECO, la Generalitat de Catalunya, el\u00a0European\u00a0ResearchCouncil\u00a0(ERC) i l’Obra Social \u201cLa Caixa\u201d.<\/p>\n

—<\/p>\n

Article de refer\u00e8ncia:
\n<\/em> Pilar Rodr\u00edguez-Franco, Agust\u00ed Brugu\u00e9s, Ariadna Mar\u00edn-Llaurad\u00f3, Vito Conte1, Guiomar Solanas, Eduard Batlle, Jeffrey J. Fredberg, Pere Roca-Cusachs, Raimon Sunyer, Xavier Trepat (2017). Long-lived force patterns and deformation waves at repulsive epithelial boundaries. Nature Materials, DOI 10.1038\/nmat4972<\/p>\n","protected":false},"excerpt":{"rendered":"

\"\"Investigadors de l’Institut de Bioenginyeria de Catalunya (IBEC) observen per primera vegada com es produeixen ones mec\u00e0niques despr\u00e9s de la col\u00b7lisi\u00f3 entre teixits cel\u00b7lulars. <\/h3>\n

Despr\u00e9s del xoc, les c\u00e8l\u00b7lules s’empenyen i deformen formant ones que viatgen a una velocitat de tres mil\u00b7l\u00edmetres al dia. La propagaci\u00f3 d’ones mec\u00e0niques \u00e9s un comportament inesperat que desafia la visi\u00f3 actual de la din\u00e0mica cel\u00b7lular i que podria ser rellevant en el desenvolupament embrionari o en el proc\u00e9s de met\u00e0stasi.<\/p>\n","protected":false},"author":4,"featured_media":31200,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[],"post_formats":[],"class_list":["post-31218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca"],"yoast_head":"\nDescobreixen un nou tipus d'ones mec\u00e0niques que emergeixen de la col\u00b7lisi\u00f3 entre c\u00e8l\u00b7lules - 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\/descobreixen-un-nou-tipus-dones-mecaniques-que-emergeixen-de-la-col\u00b7lisio-entre-cel\u00b7lules\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Descobreixen un nou tipus d'ones mec\u00e0niques que emergeixen de la col\u00b7lisi\u00f3 entre c\u00e8l\u00b7lules - Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"og:description\" content=\"Investigadors de l'Institut de Bioenginyeria de Catalunya (IBEC) observen per primera vegada com es produeixen ones mec\u00e0niques despr\u00e9s de la col\u00b7lisi\u00f3 entre teixits cel\u00b7lulars. 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