{"id":126568,"date":"2025-06-19T10:58:05","date_gmt":"2025-06-19T08:58:05","guid":{"rendered":"https:\/\/ibecbarcelona.eu\/?p=126568"},"modified":"2025-06-19T12:15:58","modified_gmt":"2025-06-19T10:15:58","slug":"embryos-can-eliminate-bacterial-infections-before-forming-their-immune-system-a-new-research-shows","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/descobreixen-que-els-embrions-poden-eliminar-infeccions-bacterianes-abans-de-formar-el-seu-sistema-immune","title":{"rendered":"Descobreixen que els embrions poden eliminar infeccions bacterianes abans de formar el seu sistema immune"},"content":{"rendered":"\n

El treball, liderat per un equip del CSIC i l’IDIBELL amb la col\u00b7laboraci\u00f3 de l\u2019IBEC, aconsegueix visualitzar c\u00e8l\u00b7lules d’embrions eliminant infeccions bacterianes, abans de la formaci\u00f3 del sistema immune<\/strong>. La investigaci\u00f3 descriu un mecanisme de fagocitosi similar al que fan servir els gl\u00f2buls blancs, i revela que aquest mecanisme tamb\u00e9 \u00e9s present en embrions humans<\/strong>.<\/p>\n\n\n\n

\"\"
Imatge real d’un embri\u00f3 hum\u00e0 en estadi de blastocist (les c\u00e8l\u00b7lules del trofectoderm es veuen de color blau) amb bacteris fict\u00edcies (rojos), alguns d’ells ingerits per l’embri\u00f3. Cr\u00e8dit imatge: Joan Roncero-Carol, primer autor del treball.<\/figcaption><\/figure>\n\n\n\n

Una recerca liderada per investigadors de l’Institut de Biologia Molecular de Barcelona (IBMB) del CSIC<\/strong> i de l’Institut de Recerca Biom\u00e8dica de Bellvitge (IDIBELL)<\/strong> en col\u00b7laboraci\u00f3 amb l\u2019Institut de Bioenginyeria de Catalunya (IBEC) <\/strong>ha aconseguit filmar com un embri\u00f3 de pocs dies es defensa d’una potencial infecci\u00f3 per bacteris.<\/strong> El treball es publica aquesta setmana a la revista Cell Host and Microbe.<\/em><\/p>\n\n\n\n

En concret, han pogut veure com embrions de peix zebra utilitzen unes c\u00e8l\u00b7lules presents a la seva superf\u00edcie, conegudes com a c\u00e8l\u00b7lules epitelials, per ingerir i destruir els bacteris mitjan\u00e7ant un proc\u00e9s anomenat fagocitosi, similar al que realitzen els gl\u00f2buls blancs. De manera crucial, el treball va poder observar que aquesta capacitat d’eliminar bacteris tamb\u00e9 est\u00e0 present en embrions humans.<\/p>\n\n\n\n

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Per primera vegada, s\u2019ha descobert la capacitat dels embrions per eliminar infeccions, un fet que pot tenir una rellev\u00e0ncia significativa en l\u2019\u00e0mbit de la medicina reproductiva.<\/p>\n\n\n\n

Eduard Torrents<\/p>\n<\/blockquote>\n\n\n\n

Utilitzant t\u00e8cniques de microsc\u00f2pia d’\u00faltima generaci\u00f3, la investigaci\u00f3 mostra com les c\u00e8l\u00b7lules capturen bacteris <\/strong>Escherichia coli <\/em>i Staphylococcus aureus <\/em>mitjan\u00e7ant petites protuber\u00e0ncies de la seva membrana<\/strong>, en les quals est\u00e0 implicada la prote\u00efna Actina.  <\/em>“La nostra investigaci\u00f3 demostra que, a l’inici del desenvolupament \u2014abans de la implantaci\u00f3 a l’\u00fater i abans de la formaci\u00f3 d’\u00f2rgans\u2014, els embrions ja compten amb un sistema de defensa que els permet eliminar infeccions bacterianes “, apunta Esteban <\/strong>Hoijman<\/strong>, investigador de l’IBMB-CSIC i de l’IDIBELL, l\u00edder de la investigaci\u00f3. El primer autor del treball \u00e9s Joan Roncero-Carol<\/strong>, investigador predoctoral al Laboratori de Bioimatge de C\u00e8l\u00b7lules Embrion\u00e0ries<\/em> del CSIC-IDIBELL.<\/p>\n\n\n\n

Aquest proc\u00e9s, explica la investigaci\u00f3, funciona com un mecanisme de fagocitosi, activa gens d’immunitat en aquestes c\u00e8l\u00b7lules, elimina els bacteris de forma efica\u00e7 i contribueix al correcte desenvolupament embrionari en cas d’infecci\u00f3.<\/p>\n\n\n\n

“Aquest sistema podria representar l’origen de la immunitat. L’estudi ens revela la primera interacci\u00f3 entre el nou organisme en formaci\u00f3 i el seu microentorn biol\u00f2gic”, afegeix Hoijman, qui dirigeix el laboratori de <\/em>Bioimatge de C\u00e8l\u00b7lules Embrion\u00e0ries<\/em><\/a>.<\/p>\n\n\n\n

\n

El nostre equip va preparar les mostres per a la microsc\u00f2pia de fluoresc\u00e8ncia, que ens va permetre demostrar que les c\u00e8l\u00b7lules del blastocist s\u00f3n capaces de fagocitar part\u00edcules externes i bacteris.<\/p>\n\n\n\n

Marc Casals<\/p>\n<\/blockquote>\n\n\n\n

Pel que fa a la participaci\u00f3 de l\u2019IBEC a l\u2019estudi, des del grup d\u2019Infeccions Bacterianes i Ter\u00e0pies Antimicrobianes (BIAT)<\/a> de l\u2019institut, tant N\u00faria Blanco Cabra com Eduard Torrents han participat en els experiments d\u2019interacci\u00f3 entre embrions i bacteris pat\u00f2gens: \u201cAquest treball obre una nova via per entendre com l’embri\u00f3 pot interaccionar amb els bacteris com a mecanisme de protecci\u00f3. Per primera vegada, s\u2019ha descobert la capacitat dels embrions per eliminar infeccions, un fet que pot tenir una rellev\u00e0ncia significativa en l\u2019\u00e0mbit de la medicina reproductiva\u201d, diu Torrents.<\/p>\n\n\n\n

D\u2019altra banda, del grup de Bioenginyeria en Salut Reproductiva<\/a> de l\u2019IBEC, liderat per Samuel Ojosnegros, coautor de l\u2019estudi, ha col\u00b7laborat en el treball amb el cultiu d\u2019embrions  per a la realitzaci\u00f3 dels experiments: \u201cEns vam encarregar de l\u2019hormonaci\u00f3, l\u2019obtenci\u00f3 dels embrions i el seu cultiu fins a l\u2019estadi de blastocist. Tamb\u00e9 vam preparar les mostres per a la microsc\u00f2pia de fluoresc\u00e8ncia, que ens va permetre demostrar que les c\u00e8l\u00b7lules del blastocist s\u00f3n capaces de fagocitar part\u00edcules externes i bacteris\u201d,  detalla Marc Casals, cient\u00edfic del grup i coautor de l\u2019estudi.<\/p>\n\n\n\n

La recerca ha comptat tamb\u00e9 amb la participaci\u00f3 d’investigadors del Centre de Regulaci\u00f3 Gen\u00f2mica (<\/strong>CRG), de la Universitat Pompeu Fabra (UPF), de la Universitat de Barcelona (UB), de l’Hospital Universitari Dexeus i d’ICREA.<\/strong><\/p>\n\n\n\n

\n
\n
Embri\u00f3 de peix zebra utilitza protrusions riques en la prote\u00efna Actina (blava) per a envoltar i finalment ingerir un bacteri E. coli (vermell).<\/figcaption><\/figure>\n<\/div>\n\n\n\n
\n
C\u00e8l\u00b7lules epitelials de l’embri\u00f3 de peix zebra (blava) ingerint bacteris E. coli (vermell).<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

Prevenir malformacions i millorar ter\u00e0pies reproductives<\/strong><\/h4>\n\n\n\n

A l’inici del desenvolupament, els embrions estan exposats a m\u00faltiples canvis en el seu entorn que poden representar una amena\u00e7a, ja que encara no han desenvolupat el sistema immune que els protegeix.<\/p>\n\n\n\n

\n

Aquest treball podria ajudar-nos en el futur a millorar la fertilitat, prevenir malformacions embrion\u00e0ries i desenvolupar noves ter\u00e0pies reproductives<\/p>\n\n\n\n

Esteban Hoijman<\/p>\n<\/blockquote>\n\n\n\n

A l’\u00fater, les infeccions tenen una alta incid\u00e8ncia i estan associades a la infertilitat. No obstant aix\u00f2, fins ara es desconeixia com reacciona un embri\u00f3 en trobar-se amb un bacteri. Aquest treball revela que les capacitats immunes d’un embri\u00f3 comencen molt abans de l’exist\u00e8ncia dels gl\u00f2buls blancs, i “podria ajudar-nos en el futur a millorar la fertilitat, prevenir malformacions embrion\u00e0ries i desenvolupar noves ter\u00e0pies reproductives”, explica Esteban Hoijman.<\/strong><\/p>\n\n\n\n

En aquest sentit, la troballa tamb\u00e9 replanteja la necessitat, cada vegada m\u00e9s important, de con\u00e8ixer amb m\u00e9s detall la poblaci\u00f3 de bacteris que poden colonitzar l’\u00fater, diferenciant les invasores (i possibles pat\u00f2genes) de potencials bacteris residents que podrien tenir efectes beneficiosos per a la fisiologia reproductiva.<\/p>\n\n\n\n

\n\n\n\n

Article de refer\u00e8ncia:<\/strong><\/strong><\/p>\n\n\n\n

Joan Roncero-Carol, June Olaizola-Mu\u00f1oa, Bego\u00f1a Ar\u00e1n, Loris Sebastiano Mularoni, Marta Miret Cuesta, Nuria Blanco-Cabra, Marc Casals, Mireia Rumbo, Miquel Sole Inarejos, Samuel Ojosnegros, Berta Alsina, Eduard Torrents, Anna Veiga, Manuel Irimia and Esteban Hoijman*   Epithelial cells provide immunocompetence to the early embryo for bacterial clearance<\/strong>, Cell Host and Microbe (2025). <\/em>DOI: <\/em>10.1016\/j.chom.2025.05.025<\/a><\/p>\n\n\n\n

\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

El treball, liderat per un equip del CSIC i l’IDIBELL amb la col\u00b7laboraci\u00f3 de l\u2019IBEC, aconsegueix visualitzar c\u00e8l\u00b7lules d’embrions eliminant infeccions bacterianes, abans de la formaci\u00f3 del sistema immune. La investigaci\u00f3 descriu un mecanisme de fagocitosi similar al que fan servir els gl\u00f2buls blancs, i revela que aquest mecanisme tamb\u00e9 \u00e9s present en embrions humans.<\/p>\n","protected":false},"author":37,"featured_media":126538,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[1905,1783,708,1141,1071],"post_formats":[],"class_list":["post-126568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca","tag-bacterial-infections-and-antimicrobial-therapies-ca-2","tag-bioengineering-in-reproductive-health-ca","tag-collaboracions-cliniques","tag-eduard-torrents-ca","tag-samuel-ojosnegros-ca"],"yoast_head":"\nDescobreixen que els embrions poden eliminar infeccions bacterianes abans de formar el seu sistema immune - 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-que-els-embrions-poden-eliminar-infeccions-bacterianes-abans-de-formar-el-seu-sistema-immune\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Descobreixen que els embrions poden eliminar infeccions bacterianes abans de formar el seu sistema immune - Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"og:description\" content=\"El treball, liderat per un equip del CSIC i l'IDIBELL amb la col\u00b7laboraci\u00f3 de l\u2019IBEC, aconsegueix visualitzar c\u00e8l\u00b7lules d'embrions eliminant infeccions bacterianes, abans de la formaci\u00f3 del sistema immune. 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