{"id":50411,"date":"2026-01-23T13:06:32","date_gmt":"2026-01-23T12:06:32","guid":{"rendered":"https:\/\/ellipse.prbb.org\/?p=50411"},"modified":"2026-01-23T13:06:33","modified_gmt":"2026-01-23T12:06:33","slug":"explorant-els-mecanismes-de-lexocitosi","status":"publish","type":"post","link":"https:\/\/ellipse.prbb.org\/ca\/explorant-els-mecanismes-de-lexocitosi\/","title":{"rendered":"Explorant els mecanismes de l&#8217;exocitosi"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Un dels processos cel\u00b7lulars claus en el creixement, divisi\u00f3 i comunicaci\u00f3 amb l\u2019entorn de les c\u00e8l\u00b7lules \u00e9s l\u2019<strong>exocitosi<\/strong>: l\u2019expulsi\u00f3 activa de mol\u00e8cules encapsulades cap a l\u2019exterior. Es calcula que en un dia, una sola c\u00e8l\u00b7lula humana pot arribar a transportar entre 10.000 i 100.000 c\u00e0psules fins la membrana cel\u00b7lular per alliberar mol\u00e8cules a l\u2019exterior cel\u00b7lular com per exemple la secreci\u00f3 d\u2019enzims o hormones (com \u00e9s el cas de la insulina) o d\u2019altres mol\u00e8cules que permeten a la c\u00e8l\u00b7lula cr\u00e9ixer o moure\u2019s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No ha sigut fins recentment per\u00f2, que un equip liderat pel <a href=\"https:\/\/www.upf.edu\/web\/biomed\" target=\"_blank\" rel=\"noreferrer noopener\">Departament de Medicina i Ci\u00e8ncies de la Vida de la Universitat Pompeu Fabra (MELIS-UPF)<\/a>, ha identificat la <strong>maquin\u00e0ria que controla l\u2019exocitosi<\/strong>. Una <a href=\"https:\/\/www.upf.edu\/web\/biomed\/inici\/ca\/-\/asset_publisher\/Us0jfwFAevmx\/content\/nanomensajero-celula-exocitosis\/229891609\/maximized\" target=\"_blank\" rel=\"noreferrer noopener\">troballa<\/a> que ha estat possible gr\u00e0cies a la combinaci\u00f3 de <strong>microscopis&nbsp; \u00f2ptics i electr\u00f2nics <\/strong>d\u2019\u00faltima generaci\u00f3 i l\u2019<strong>an\u00e0lisi de les imatges obtingudes amb intel\u00b7lig\u00e8ncia artificial<\/strong>.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u201cTot i ser una de les nanom\u00e0quines m\u00e9s grans de la c\u00e8l\u00b7lula, la seva curta vida \u00fatil i el seu dinamisme la feien molt dif\u00edcil de capturar\u201d<br><strong>Oriol Gallego (MELIS-UPF)<\/strong><\/p><\/blockquote>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La recerca ha mostrat que la maquin\u00e0ria que permet l\u2019exocitosi presenta un nucli format per <strong>set conjunts de prote\u00efnes<\/strong>, l\u2019<strong>ExHOS<\/strong> (per les seves sigles en angl\u00e8s). I que \u00e9s aquest anell flexible que formen el que permet subjectar aquestes c\u00e0psules fins la membrana cel\u00b7lular. \u201cL\u2019ExHOS compta amb tres punts de control i un mecanisme de desembalatge que garanteix que el lliurament de mercaderies en la c\u00e8l\u00b7lula continu\u00ef a la velocitat adequada\u201d, explica <strong>Marta Puig-Tint\u00f3<\/strong>, investigadora del MELIS i una de les principals autores de l&#8217;article.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u2019espera que en el futur aquest descobriment pugui tenir un impacte en la ci\u00e8ncia aplicada. Ja que alguns pat\u00f2gens, tant vegetals -com el fong de la infecci\u00f3 de l\u2019arr\u00f2s- com humans -com el SARS-CoV-2, el VIH o la <em>Salmonella<\/em>-, fan \u00fas de l\u2019exocitosi de les c\u00e8l\u00b7lules de l\u2019hoste per infectar-lo o minvar les seves defenses.<\/p>\n\n\n\n<div style=\"height:46px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Una recerca liderada pel MELIS-UPF ha identificat l&#8217;ExHOS el nanomissatger que interv\u00e9 en els processos de secreci\u00f3 cel\u00b7lular gr\u00e0cies a la microsc\u00f2pia \u00f2ptica i electr\u00f2nica i l&#8217;an\u00e0lisi d&#8217;imatges amb intel\u00b7lig\u00e8ncia artificial. <\/p>\n","protected":false},"author":29,"featured_media":50412,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[26],"tags":[269,273],"new-type":[40],"class_list":["post-50411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recerca","tag-biologia-cellular","tag-melis-upf-ca","new-type-foto-de-la-setmana"],"acf":[],"_links":{"self":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/50411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/comments?post=50411"}],"version-history":[{"count":23,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/50411\/revisions"}],"predecessor-version":[{"id":50443,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/50411\/revisions\/50443"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/media\/50412"}],"wp:attachment":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/media?parent=50411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/categories?post=50411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/tags?post=50411"},{"taxonomy":"new-type","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/new-type?post=50411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}