{"id":43127,"date":"2026-08-05T14:12:01","date_gmt":"2026-08-05T12:12:01","guid":{"rendered":"https:\/\/ellipse.prbb.org\/?p=43127"},"modified":"2026-08-05T14:15:29","modified_gmt":"2026-08-05T12:15:29","slug":"el-viatge-de-les-hormones-esteroidals","status":"publish","type":"post","link":"https:\/\/ellipse.prbb.org\/ca\/el-viatge-de-les-hormones-esteroidals\/","title":{"rendered":"El viatge de les hormones esteroidals"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Testosterona, estradiol, <a href=\"https:\/\/ellipse.prbb.org\/ca\/com-afecten-les-hormones-sexuals-als-microvasos-mamaris\/\" target=\"_blank\" rel=\"noreferrer noopener\">progesterona<\/a>, cortisol. Totes elles s\u00f3n <strong>hormones esteroidals <\/strong>amb un paper fisiol\u00f2gic molt important en el desenvolupament, creixement, manteniment i regulaci\u00f3 de l\u2019organisme i el seu<strong> sistema reproductor<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A nivell molecular, les hormones s\u00f3n uns <strong>missatgers qu\u00edmics<\/strong> que <a href=\"https:\/\/ellipse.prbb.org\/ca\/transduccio-de-senyal-com-funciona-la-xarxa-de-comunicacio-cel%c2%b7lular\/\" target=\"_blank\" rel=\"noreferrer noopener\">transporten un senyal d\u2019una c\u00e8l\u00b7lula fins a una altra<\/a>. A difer\u00e8ncia d\u2019altres missatgers que activen receptors a nivell de la membrana de la c\u00e8l\u00b7lula, <strong>les hormones esteroidals s\u00f3n lip\u00eddiques<\/strong> i poden penetrar dins la c\u00e8l\u00b7lula travessant la membrana. Un cop al citoplasma de la c\u00e8l\u00b7lula, les hormones s\u2019uneixen als seus receptors, els quals fins ara estaven inhibits per la seva uni\u00f3 a les <strong>prote\u00efnes HSP (heat shock proteins)<\/strong>. Un cop la hormona s\u2019uneix al receptor les HSP s\u00f3n alliberades i el nou <strong>complex \u201chormona-receptor hormonal\u201d<\/strong> viatja fins al nucli. All\u00e0 s\u2019uneix a l\u2019ADN i aix\u00ed regula l\u2019<strong>expressi\u00f3 g\u00e8nica<\/strong>, activant o reprimint la formaci\u00f3 de determinades prote\u00efnes que generaran una resposta al senyal hormonal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A m\u00e9s, des del citoplasma, les hormones esteroidals tamb\u00e9 s\u00f3n capaces d\u2019<strong>activar les vies de senyalitzaci\u00f3 de les quinases<\/strong>: aquestes vies tamb\u00e9 acaben afectant la regulaci\u00f3 g\u00e8nica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u2019aquesta manera la senyalitzaci\u00f3 per hormones esteroidals \u00e9s m\u00e9s <strong>directa i r\u00e0pida<\/strong> que la senyalitzaci\u00f3 mitjan\u00e7ant molts dels altres missatgers que es queden a nivell de membrana i que envien la seva senyal a trav\u00e9s d\u2019una llarga cascada de mol\u00e8cules.<\/p>\n\n\n\n<div style=\"height:57px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div style=\"height:51px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En aquest article divulgatiu us parlem del viatge que fan hormones com la testosterona per arribar fins l&#8217;ADN i modificar l&#8217;expressi\u00f3 g\u00e8nica. <\/p>\n","protected":false},"author":33,"featured_media":44738,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,5],"tags":[269,513],"new-type":[13,35],"class_list":["post-43127","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-i-societat","category-public-engagement","tag-biologia-cellular","tag-ciencia-al-descobert","new-type-news","new-type-noticies"],"acf":[],"_links":{"self":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/43127","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\/33"}],"replies":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/comments?post=43127"}],"version-history":[{"count":8,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/43127\/revisions"}],"predecessor-version":[{"id":52161,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/posts\/43127\/revisions\/52161"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/media\/44738"}],"wp:attachment":[{"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/media?parent=43127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/categories?post=43127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/tags?post=43127"},{"taxonomy":"new-type","embeddable":true,"href":"https:\/\/ellipse.prbb.org\/ca\/wp-json\/wp\/v2\/new-type?post=43127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}