{"id":93303,"date":"2022-03-15T11:37:00","date_gmt":"2022-03-15T10:37:00","guid":{"rendered":"https:\/\/testweb.ibecbarcelona.eu\/?p=93303"},"modified":"2022-04-04T12:06:45","modified_gmt":"2022-04-04T10:06:45","slug":"la-fusio-cellular-desperta-el-potencial-regeneratiu-de-la-retina-humana","status":"publish","type":"post","link":"https:\/\/ibecbarcelona.eu\/ca\/la-fusio-cellular-desperta-el-potencial-regeneratiu-de-la-retina-humana\/","title":{"rendered":"La fusi\u00f3 cel\u00b7lular \u201cdesperta\u201d el potencial regeneratiu de la retina humana"},"content":{"rendered":"\n

Fusing human retinal cells with adult stem cells could be a potential therapeutic La fusi\u00f3 de c\u00e8l\u00b7lules retinianes humanes amb c\u00e8l\u00b7lules mare adultes podria ser una futura estrat\u00e8gia terap\u00e8utica per a tractar el dany retini\u00e0 i la discapacitat visual, segons les troballes d’un nou estudi publicat a la revista eBioMedicine, amb participaci\u00f3 del grup de recerca de la Nuria Montserrat a l\u2019IBEC. Les c\u00e8l\u00b7lules h\u00edbrides \u201cdesperten\u201d la capacitat regenerativa del teixit de la retina humana, un tret que es creia exclusiu dels vertebrats de sang freda.<\/h4>\n\n\n\n
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Secci\u00f3\u202ftransversal d’un\u202forganoide\u202fretini\u00e0, que\u202fmostra\u202fla\u202fubicaci\u00f3\u202fde\u202fdiferents\u202ftipus\u202fde\u202fneurones\u202fcom\u202fels\u202fganglis\u202f(vermell)\u202fi la\u202fglia\u202fde\u202fM\u00fcller\u202f(verd).\u202fCr\u00e8dit: Sergi Bonilla\/Lancet\u202feBioMedicine\u00a0<\/em><\/figcaption><\/figure><\/div>\n\n\n\n

Els esdeveniments de fusi\u00f3 cel\u00b7lular, el proc\u00e9s que es duu a terme combinant dues c\u00e8l\u00b7lules diferents en una sola entitat, s\u00f3n un possible mecanisme que contribueix a la regeneraci\u00f3 de teixits. Encara que \u00e9s rar en humans, el fenomen s’ha detectat constantment en el fetge, el cervell i el tracte gastrointestinal. <\/p>\n\n\n\n

Un equip liderat per la professora d\u2019investigaci\u00f3 ICREA\u202fPia\u202fCosma\u202fal Centre de Regulaci\u00f3 Gen\u00f2mica (CRG)\u202fde Barcelona i finan\u00e7at per la\u202fFundaci\u00f3\u202f\u201cla Caixa\u201d ha descobert que els esdeveniments de fusi\u00f3\u202fcel\u00b7lular tamb\u00e9 tenen lloc a la retina humana. El Grup de la professora ICREA Nuria Montserrat, Pluripot\u00e8ncia per a la Regeneraci\u00f3 d’Organs, tamb\u00e9 va participar en l’estudi amb la producci\u00f3 i caracteritzaci\u00f3 d’organoides de la retina humana.\u00a0<\/p>\n\n\n\n

<\/div>\n\n\n\n

L’equip va estudiar la possibilitat que els esdeveniments de fusi\u00f3 cel\u00b7lular resultessin en c\u00e8l\u00b7lules que es diferencien i es converteixen en neurones, cosa que mostraria el seu potencial per a la regeneraci\u00f3 de teixits. L’equip va fusionar la glia de\u202fM\u00fcller, c\u00e8l\u00b7lules que exerceixen un paper secundari per\u00f2 important en el manteniment de l’estructura i funci\u00f3 de la retina, amb c\u00e8l\u00b7lules mare adultes derivades del teixit adip\u00f3s hum\u00e0 o de la medul\u00b7la \u00f2ssia. <\/p>\n\n\n\n

\u201cVam poder realitzar la fusi\u00f3 cel\u00b7lular in vitro, creant c\u00e8l\u00b7lules h\u00edbrides. \u00c9s important destacar que el proc\u00e9s d’hibridaci\u00f3 va ser m\u00e9s eficient en pres\u00e8ncia d’un senyal qu\u00edmic, normalment transm\u00e8s des de la retina en resposta al dany, la qual cosa va resultar en un augment del doble de les taxes d’hibridaci\u00f3. Aix\u00f2 \u00e9s una pista important sobre el paper de la fusi\u00f3 cel\u00b7lular a la retina\u201d, afirma Sergi Bonilla, investigador postdoctoral del\u202fCRG\u202fi primer autor de l’estudi.\u00a0<\/p>\n\n\n\n

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Secci\u00f3 transversal d’un\u202forganoide\u202fretini\u00e0\u202fque mostra c\u00e8l\u00b7lules h\u00edbrides (verd) empeltant-se en el teixit. La fluoresc\u00e8ncia vermella indica l’activitat dels nous ganglis que s’estan formant. Cr\u00e8dit: Sergi Bonilla\/Lancet\u202feBioMedicine<\/em>\u00a0<\/figcaption><\/figure><\/div>\n\n\n\n

Les c\u00e8l\u00b7lules h\u00edbrides es van injectar en un\u202forganoide\u202fretini\u00e0\u202fen desenvolupament, un model que imita de prop la funci\u00f3 de la retina humana. Els autors de l’estudi van descobrir que les c\u00e8l\u00b7lules h\u00edbrides es van empeltar amb \u00e8xit en el teixit i es van diferenciar en c\u00e8l\u00b7lules que s’assemblen molt a les c\u00e8l\u00b7lules ganglionars, un tipus de neurona essencial per a la visi\u00f3. <\/p>\n\n\n\n

\u201cLes nostres troballes s\u00f3n importants perqu\u00e8 mostren que la glia de\u202fM\u00fcller\u202fa la retina humana t\u00e9 el potencial de regenerar neurones\u201d, afirma\u202fPia\u202fCosma. \u201cLes salamandres i els peixos poden reparar els danys causats a la retina gr\u00e0cies a la glia de\u202fM\u00fcller, ja que es diferencien en neurones que rescaten o reemplacen les neurones danyades. La glia de\u202fM\u00fcller\u202fde mam\u00edfers han perdut aquesta capacitat regenerativa, cosa que significa que el dany o la degradaci\u00f3 de la retina pot provocar una discapacitat visual per a tota la vida. Les nostres troballes ens acosten un pas m\u00e9s a la recuperaci\u00f3 d’aquesta capacitat\u201d.\u00a0<\/p>\n\n\n\n

<\/div>\n\n\n\n

Els autors adverteixen que queda molta feina per fer abans del desenvolupament de qualsevol tractament potencial. Un dels seg\u00fcents passos \u00e9s comprendre per qu\u00e8 les c\u00e8l\u00b7lules h\u00edbrides, amb quatre parells complets de cromosomes, no resulten en inestabilitat cromos\u00f2mica ni en desenvolupament de c\u00e0ncer. Els autors de l’estudi creuen que la retina pot tenir un mecanisme que regula la segregaci\u00f3 cromos\u00f2mica similar al fetge, que cont\u00e9 c\u00e8l\u00b7lules\u202ftetraploides\u202fque actuen com\u202freservori\u202fgen\u00e8tic, experimentant mitosi en resposta a l’estr\u00e8s i les lesions. <\/p>\n\n\n\n

L’estudi ha estat liderat pel Centre de Regulaci\u00f3 Gen\u00f2mica en col\u00b7laboraci\u00f3 amb l’Institut de\u202fBioingenieria\u202fde Catalunya (IBEC) i el Centre d’Oftalmologia Barraquer. El treball est\u00e0 finan\u00e7at principalment per un Projecte CaixaResearch d\u2019Investigaci\u00f3 en Salut de la\u202fFundaci\u00f3\u202f\u201cla Caixa\u201d atorgat a\u202fPia\u202fCosma\u202f(CRG), Nuria Montserrat (IBEC) i Justin Christopher D\u2019Antin\u202f(Barrraquer). Tamb\u00e9 est\u00e0 finan\u00e7at pel projecte\u202fFET-Open\u202fEcaBox\u202fde la Uni\u00f3 Europea,\u202fVelux\u202fStiftung, el Ministeri de Ci\u00e8ncia i Innovaci\u00f3 d’Espanya i l’Ag\u00e8ncia de Gesti\u00f3 d\u2019Ajuts Universitaris i de Recerca (AGAUR).\u00a0<\/p>\n\n\n\n

\n\n\n\n

Article de refer\u00e8ncia:<\/strong>\u00a0Muller glia fused with adult stem cells undergo neural differentiation in human retinal models. eBioMedicine 2022;77: 103914\u00a0\u00a0<\/p>\n\n\n\n

DOI: 10.1016\/j.ebiom.2022.103914 <\/p>\n\n\n\n

\n\n\n\n

Finan\u00e7ament<\/strong><\/p>\n\n\n\n

Aquest treball ha estat finan\u00e7at per una beca\u202fCaixa\u202fHealth\u202f(HR17-00231),\u202fVelux\u202fStiftung\u202f(976a), Ministeri de Ci\u00e8ncia i Innovaci\u00f3, (BFU2017-86760-P) (AEI\/FEDER, UE),\u202fAGAUR\u202f(2017\u202fSGR\u202f689, 2017\u202fSGR\u202f926) i el programa de recerca i innovaci\u00f3 Horitz\u00f3 2020 de la Uni\u00f3 Europea en virtut de l’acord de subvenci\u00f3 n\u00fam. 964342 per al projecte\u202fEcaBox.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

La fusi\u00f3 de c\u00e8l\u00b7lules retinianes humanes amb c\u00e8l\u00b7lules mare adultes podria ser una futura estrat\u00e8gia terap\u00e8utica per a tractar el dany retini\u00e0 i la discapacitat visual, segons les troballes d’un nou estudi publicat a la revista eBioMedicine, amb participaci\u00f3 del grup de recerca de la Nuria Montserrat a l\u2019IBEC. Les c\u00e8l\u00b7lules h\u00edbrides \u201cdesperten\u201d la capacitat regenerativa del teixit de la retina humana, un tret que es creia exclusiu dels vertebrats de sang freda. <\/h3>\n","protected":false},"author":4,"featured_media":93301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[1123],"post_formats":[],"class_list":["post-93303","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticies-de-recerca","tag-nuria-montserrat-ca-2"],"yoast_head":"\nLa fusi\u00f3 cel\u00b7lular \u201cdesperta\u201d el potencial regeneratiu de la retina humana - 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-fusio-cellular-desperta-el-potencial-regeneratiu-de-la-retina-humana\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La fusi\u00f3 cel\u00b7lular \u201cdesperta\u201d el potencial regeneratiu de la retina humana - Institute for Bioengineering of Catalonia\" \/>\n<meta property=\"og:description\" content=\"La fusi\u00f3 de c\u00e8l\u00b7lules retinianes humanes amb c\u00e8l\u00b7lules mare adultes podria ser una futura estrat\u00e8gia terap\u00e8utica per a tractar el dany retini\u00e0 i la discapacitat visual, segons les troballes d'un nou estudi publicat a la revista eBioMedicine, amb participaci\u00f3 del grup de recerca de la Nuria Montserrat a l\u2019IBEC. 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