{"id":65557,"date":"2026-08-06T14:29:04","date_gmt":"2026-08-06T18:29:04","guid":{"rendered":"https:\/\/rheolution.com\/?p=65557"},"modified":"2026-08-14T09:37:22","modified_gmt":"2026-08-14T13:37:22","slug":"gelma-hydrogels","status":"publish","type":"post","link":"https:\/\/rheolution.com\/fr\/notes-application\/gelma-hydrogels\/","title":{"rendered":"Hydrogels GelMA"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"65557\" class=\"elementor elementor-65557 elementor-62796\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8fd4dcf e-flex e-con-boxed e-con e-parent\" data-id=\"8fd4dcf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c770e2 elementor-widget elementor-widget-heading\" data-id=\"8c770e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\">Note d\u2019application | ElastoSens\u2122 Bio<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-760ae40 elementor-widget elementor-widget-heading\" data-id=\"760ae40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Hydrogels GelMA : propri\u00e9t\u00e9s, applications et comportement m\u00e9canique<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16057f6 elementor-widget elementor-widget-text-editor\" data-id=\"16057f6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>par <a href=\"https:\/\/www.linkedin.com\/in\/mayasalame\/\">Maya Salame<\/a> et <a href=\"https:\/\/www.linkedin.com\/in\/dimitria-camas%C3%A3o-049002a2\/\">Dimitria Camasao<\/a><\/p><p>Scientifiques d\u2019application<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-97ac8de e-flex e-con-boxed e-con e-parent\" data-id=\"97ac8de\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5fc8fde elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"5fc8fde\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Qu'est-ce qu'un hydrogel GelMA ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d61237b elementor-widget elementor-widget-text-editor\" data-id=\"d61237b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">La g\u00e9latine m\u00e9thacryloyle (GelMA) est un hydrogel photor\u00e9ticulable d\u00e9riv\u00e9 de la g\u00e9latine, elle-m\u00eame obtenue par hydrolyse partielle du collag\u00e8ne, la principale prot\u00e9ine structurelle de la matrice extracellulaire (MEC). Le GelMA est synth\u00e9tis\u00e9 par r\u00e9action de la g\u00e9latine avec de l\u2019anhydride m\u00e9thacrylique, ce qui introduit des groupes fonctionnels m\u00e9thacryloyle sur les r\u00e9sidus d\u2019acides amin\u00e9s de la g\u00e9latine tout en pr\u00e9servant la plupart de ses motifs bioactifs natifs. Cette modification permet une r\u00e9ticulation covalente sous l\u2019effet de la lumi\u00e8re tout en conservant la biocompatibilit\u00e9 inh\u00e9rente \u00e0 la g\u00e9latine, sa d\u00e9gradabilit\u00e9 enzymatique et ses s\u00e9quences interactives avec les cellules. Gr\u00e2ce \u00e0 sa mise en \u0153uvre en milieu aqueux, \u00e0 ses conditions de r\u00e9ticulation douces et \u00e0 sa similitude structurelle avec la MEC native, le GelMA est devenu un biomat\u00e9riau largement utilis\u00e9 en bio-ing\u00e9nierie et dans la recherche biom\u00e9dicale.   <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5703c6a elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"5703c6a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Propri\u00e9t\u00e9s principales des hydrogels \u00e0 base de GelMA<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a0b64a elementor-widget elementor-widget-heading\" data-id=\"5a0b64a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Caract\u00e9ristiques physico-chimiques<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38524ee elementor-widget elementor-widget-text-editor\" data-id=\"38524ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Les hydrogels GelMA se forment par polym\u00e9risation radicalaire photo-initi\u00e9e des groupes m\u00e9thacryloyle, en pr\u00e9sence d&rsquo;un photo-initiateur hydrosoluble et sous l&rsquo;effet d&rsquo;une exposition \u00e0 la lumi\u00e8re. Ce processus permet d&rsquo;obtenir un r\u00e9seau r\u00e9ticul\u00e9 de mani\u00e8re covalente dans des conditions douces et compatibles avec les cellules. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e821974 elementor-widget elementor-widget-text-editor\" data-id=\"e821974\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Parmi les principales caract\u00e9ristiques physico-chimiques, on peut citer :<\/span><\/p><ul><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">M\u00e9canisme de r\u00e9ticulation : polym\u00e9risation radicalaire des substituants m\u00e9thacryloyle induite par la lumi\u00e8re.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Formulation ajustable : la concentration en GelMA, le degr\u00e9 de m\u00e9thacrylation, la teneur en photo-initiateur et la dose de lumi\u00e8re permettent de r\u00e9guler la densit\u00e9 du r\u00e9seau.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Comportement de g\u00e9lification double : g\u00e9lification physique \u00e0 basse temp\u00e9rature due aux cha\u00eenes de g\u00e9latine, suivie d&rsquo;une stabilisation chimique par photor\u00e9ticulation.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Sensibilit\u00e9 aux conditions environnementales : la temp\u00e9rature, le pH et la force ionique influencent la viscosit\u00e9 du pr\u00e9polym\u00e8re et la cin\u00e9tique de g\u00e9lification.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8842651 elementor-widget elementor-widget-text-editor\" data-id=\"8842651\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Ces param\u00e8tres permettent de contr\u00f4ler avec pr\u00e9cision la structure, la porosit\u00e9 et la stabilit\u00e9 de l&rsquo;hydrogel.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30981bc elementor-widget elementor-widget-heading\" data-id=\"30981bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Propri\u00e9t\u00e9s m\u00e9caniques<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e827a1 elementor-widget elementor-widget-text-editor\" data-id=\"2e827a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Le comportement m\u00e9canique des hydrogels GelMA est hautement modulable et directement li\u00e9 \u00e0 l&rsquo;architecture du r\u00e9seau et \u00e0 la densit\u00e9 de r\u00e9ticulation. Le module d&rsquo;\u00e9lasticit\u00e9 et la rigidit\u00e9 augmentent avec une concentration plus \u00e9lev\u00e9e en polym\u00e8re et des degr\u00e9s de substitution m\u00e9thacryloyle plus \u00e9lev\u00e9s. \u00c0 l&rsquo;inverse, les r\u00e9seaux moins fortement r\u00e9ticul\u00e9s pr\u00e9sentent une plus grande souplesse et des taux de gonflement plus \u00e9lev\u00e9s.  <\/span><\/p><p><span style=\"font-weight: 400\">Les caract\u00e9ristiques m\u00e9caniques sont les suivantes :<\/span><\/p><ul><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Des modules d&rsquo;\u00e9lasticit\u00e9 faibles, comparables \u00e0 ceux des tissus, allant de quelques kilopascals \u00e0 plusieurs dizaines de kilopascals.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">La rigidit\u00e9 d\u00e9pend fortement de la composition et des conditions d&rsquo;exposition \u00e0 la lumi\u00e8re.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Un ramollissement m\u00e9canique progressif au cours de la d\u00e9gradation enzymatique, \u00e0 mesure que le r\u00e9seau se remod\u00e8le.<\/span><\/li><\/ul><p><span style=\"font-weight: 400\">Cette adaptabilit\u00e9 permet aux hydrogels GelMA de s&rsquo;aligner sur les propri\u00e9t\u00e9s m\u00e9caniques de divers tissus mous.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0959975 elementor-widget elementor-widget-heading\" data-id=\"0959975\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Interactions biologiques<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90cc644 elementor-widget elementor-widget-text-editor\" data-id=\"90cc644\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Le GelMA favorise intrins\u00e8quement les interactions entre les cellules et le mat\u00e9riau gr\u00e2ce aux motifs biochimiques issus de la g\u00e9latine qui y sont conserv\u00e9s. Les s\u00e9quences arginine-glycine-acide aspartique (RGD) favorisent l&rsquo;adh\u00e9sion cellulaire, tandis que les domaines sensibles aux m\u00e9talloprot\u00e9inases matricielles permettent un remodelage induit par les cellules. <\/span><\/p><p><span style=\"font-weight: 400\">Parmi les caract\u00e9ristiques biologiques, on peut citer :<\/span><\/p><ul><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Une cytocompatibilit\u00e9 \u00e9lev\u00e9e et une faible immunog\u00e9nicit\u00e9.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Favorise l&rsquo;adh\u00e9sion, l&rsquo;\u00e9talement, la prolif\u00e9ration et la migration cellulaires.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">D\u00e9gradabilit\u00e9 enzymatique induite par des prot\u00e9ases s\u00e9cr\u00e9t\u00e9es par les cellules.<\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Compatibilit\u00e9 avec l&rsquo;encapsulation cellulaire lors de la photor\u00e9ticulation.<\/span><\/li><\/ul><p><span style=\"font-weight: 400\">Ces propri\u00e9t\u00e9s font du GelMA un mat\u00e9riau particuli\u00e8rement adapt\u00e9 aux environnements dynamiques et r\u00e9actifs aux cellules.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28004d8 elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"28004d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications des hydrogels GelMA<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-06adff0 elementor-widget elementor-widget-heading\" data-id=\"06adff0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Ing\u00e9nierie tissulaire<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba2f1b1 elementor-widget elementor-widget-text-editor\" data-id=\"ba2f1b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Les hydrogels GelMA sont largement utilis\u00e9s comme matrices pour l&rsquo;ing\u00e9nierie tissulaire, notamment pour le cartilage, l&rsquo;os, le muscle cardiaque, les vaisseaux sanguins et le muscle squelettique. Leurs propri\u00e9t\u00e9s m\u00e9caniques ajustables, leur d\u00e9gradabilit\u00e9 et leur bioactivit\u00e9 permettent de cr\u00e9er des matrices qui guident l&rsquo;organisation cellulaire, la diff\u00e9renciation et la maturation tissulaire. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d01f123 elementor-widget elementor-widget-heading\" data-id=\"d01f123\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Culture cellulaire 3D et mod\u00e8les de maladies<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-137d5ec elementor-widget elementor-widget-text-editor\" data-id=\"137d5ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Dans la culture cellulaire tridimensionnelle, le GelMA offre un environnement imitant la matrice extracellulaire (MEC) qui favorise un comportement cellulaire conforme aux conditions physiologiques. Il est largement utilis\u00e9 dans les mod\u00e8les organotypiques, les syst\u00e8mes microfabriqu\u00e9s et les plateformes \u00ab organe sur puce \u00bb pour \u00e9tudier les interactions cellule-matrice, la m\u00e9canobiologie et la progression des maladies. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1cb3eb elementor-widget elementor-widget-heading\" data-id=\"c1cb3eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">D\u00e9livrance de m\u00e9dicaments, de g\u00e8nes et de cellules<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff74672 elementor-widget elementor-widget-text-editor\" data-id=\"ff74672\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Les hydrogels GelMA servent de vecteurs d&rsquo;administration pour les m\u00e9dicaments, les g\u00e8nes et les cellules th\u00e9rapeutiques. La structure contr\u00f4l\u00e9e de leur r\u00e9seau permet de moduler les profils de diffusion et de lib\u00e9ration, tandis que leur d\u00e9gradation enzymatique permet une lib\u00e9ration localis\u00e9e et m\u00e9di\u00e9e par les cellules de la charge utile. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-892f73a elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"892f73a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pourquoi la visco\u00e9lasticit\u00e9 des hydrogels GelMA est-elle importante ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-05c6bea elementor-widget elementor-widget-text-editor\" data-id=\"05c6bea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Les hydrogels GelMA pr\u00e9sentent un comportement visco\u00e9lastique qui se rapproche davantage de celui des tissus biologiques naturels que celui des mat\u00e9riaux purement \u00e9lastiques. La visco\u00e9lasticit\u00e9 influence la mani\u00e8re dont les cellules per\u00e7oivent leur microenvironnement et y r\u00e9agissent, ce qui a une incidence sur l\u2019adh\u00e9sion, la migration, la diff\u00e9renciation et le remodelage de la matrice. Les r\u00e9ponses m\u00e9caniques d\u00e9pendantes du temps r\u00e9gissent \u00e9galement la dissipation des charges, l\u2019int\u00e9grit\u00e9 structurelle et les performances \u00e0 long terme dans des contextes biologiques dynamiques. Il est donc essentiel de comprendre et de contr\u00f4ler les propri\u00e9t\u00e9s visco\u00e9lastiques pour pr\u00e9dire le comportement in vitro et la fonctionnalit\u00e9 in vivo.   <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-851f298 elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"851f298\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9thodes de caract\u00e9risation de la visco\u00e9lasticit\u00e9 des hydrogels de GelMA<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-171be53 elementor-widget elementor-widget-text-editor\" data-id=\"171be53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Les propri\u00e9t\u00e9s m\u00e9caniques et visco\u00e9lastiques des hydrogels GelMA sont g\u00e9n\u00e9ralement caract\u00e9ris\u00e9es \u00e0 l\u2019aide de la rh\u00e9om\u00e9trie en masse, d\u2019essais de compression et d\u2019essais de traction. Ces techniques fournissent des informations pr\u00e9cieuses sur le module d\u2019\u00e9lasticit\u00e9, les modules de stockage et de perte, ainsi que sur le comportement \u00e0 la rupture des r\u00e9seaux enti\u00e8rement form\u00e9s. Cependant, les m\u00e9thodes traditionnelles n\u00e9cessitent souvent un contact direct, d\u2019importantes d\u00e9formations ou une pr\u00e9paration destructive des \u00e9chantillons, et ne permettent g\u00e9n\u00e9ralement pas de saisir les changements m\u00e9caniques rapides survenant lors de la photor\u00e9ticulation. Par cons\u00e9quent, elles sont peu adapt\u00e9es au suivi de la cin\u00e9tique de photog\u00e9lification, \u00e0 l\u2019identification du point de transition liquide-gel ou au suivi de l\u2019\u00e9volution m\u00e9canique aux stades pr\u00e9coces dans des conditions st\u00e9riles ou en pr\u00e9sence de cellules.   <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1961b9f elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor-widget elementor-widget-heading\" data-id=\"1961b9f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u00c9tude de cas : Caract\u00e9risation m\u00e9canique de l'hydrogel GelMA \u00e0 l'aide d'ElastoSens\u2122 Bio<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4babf25 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"4babf25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">ElastoSens\u2122 Bio : un outil non destructif permettant de mesurer les hydrogels souples \u00e0 base de GelMA<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5a225c3 e-grid e-con-full e-con e-child\" data-id=\"5a225c3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ce43e5b elementor-widget elementor-widget-text-editor\" data-id=\"ce43e5b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L&rsquo; <a href=\"https:\/\/rheolution.com\/instrument-elastosensbio\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400\"><strong>ElastoSens\u2122 Bio<\/strong><\/span><\/a> <span style=\"font-weight: 400\">permet la mesure non destructive et en temps r\u00e9el des propri\u00e9t\u00e9s visco\u00e9lastiques des hydrogels GelMA souples et photor\u00e9ticulables. Gr\u00e2ce \u00e0 une excitation sans contact de faible amplitude, associ\u00e9e \u00e0 un module de photostimulation int\u00e9gr\u00e9, il permet de suivre directement la cin\u00e9tique de photor\u00e9ticulation, d\u2019identifier la transition liquide-gel et de quantifier avec pr\u00e9cision la rigidit\u00e9 finale. Des mesures r\u00e9p\u00e9t\u00e9es sur un m\u00eame \u00e9chantillon, r\u00e9alis\u00e9es dans des conditions st\u00e9riles, permettent de mener des \u00e9tudes longitudinales sur la formation, la maturation, la d\u00e9gradation et le remodelage induit par les cellules du GelMA.  <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-045aef9 elementor-widget elementor-widget-image\" data-id=\"045aef9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"968\" height=\"544\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?fit=968%2C544&amp;ssl=1\" class=\"attachment-large size-large wp-image-50364\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?w=968&amp;ssl=1 968w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?resize=133%2C75&amp;ssl=1 133w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?resize=480%2C270&amp;ssl=1 480w\" sizes=\"(max-width:767px) 700px, (max-width:968px) 100vw, 968px\" data-attachment-id=\"50364\" data-permalink=\"https:\/\/rheolution.com\/fr\/elastosens2-4-2-2-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?fit=968%2C544&amp;ssl=1\" data-orig-size=\"968,544\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"elastosens2\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/elastosens2-1.webp?fit=968%2C544&amp;ssl=1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b87c673 elementor-widget elementor-widget-text-editor\" data-id=\"b87c673\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Afin de d\u00e9montrer les capacit\u00e9s de l\u2019ElastoSens\u2122 Bio, nous avons r\u00e9alis\u00e9 une s\u00e9rie de tests sur des hydrogels \u00e0 base de GelMA. La section suivante pr\u00e9sente les mat\u00e9riaux et les m\u00e9thodes utilis\u00e9s, puis expose les r\u00e9sultats, offrant ainsi un exemple concret de la capacit\u00e9 de l\u2019instrument \u00e0 surveiller de mani\u00e8re non destructive les propri\u00e9t\u00e9s visco\u00e9lastiques au fil du temps. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed23fc9 elementor-widget elementor-widget-heading\" data-id=\"ed23fc9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Mat\u00e9riel et m\u00e9thodes<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d118051 elementor-widget elementor-widget-text-editor\" data-id=\"d118051\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">La g\u00e9latine m\u00e9thacryl\u00e9e (PhotoGel\u00ae, 5272 ; Advanced BioMatrix) a \u00e9t\u00e9 pr\u00e9par\u00e9e conform\u00e9ment aux instructions du fabricant. Le ph\u00e9nyl-2,4,6-trim\u00e9thylbenzoylphosphinate de lithium (LAP) a \u00e9t\u00e9 pr\u00e9par\u00e9 sous forme d\u2019une solution m\u00e8re \u00e0 17 mg\/mL dans du PBS, puis ajout\u00e9 \u00e0 la formulation de PhotoGel\u00ae conform\u00e9ment aux indications du fabricant. Le PhotoGel\u00ae a \u00e9t\u00e9 dissous dans du PBS \u00e0 60 \u00b0C et pr\u00e9par\u00e9 \u00e0 des concentrations de 5 % et 10 % (p\/v). Pour chaque condition, 2 ml de la solution pr\u00e9curseur ont \u00e9t\u00e9 vers\u00e9s dans le porte-\u00e9chantillon ElastoSens\u2122 Bio macro, puis la mesure a \u00e9t\u00e9 lanc\u00e9e imm\u00e9diatement. Les \u00e9chantillons ont \u00e9t\u00e9 mis \u00e0 \u00e9quilibre \u00e0 20 \u00b0C pendant 10 minutes (\u00e0 l\u2019abri de la lumi\u00e8re). Une photor\u00e9ticulation a ensuite \u00e9t\u00e9 r\u00e9alis\u00e9e sous une lumi\u00e8re de 405 nm \u00e0 une intensit\u00e9 de 8 mW\/cm\u00b2 pendant 20 minutes, tandis que les mesures visco\u00e9lastiques ont \u00e9t\u00e9 enregistr\u00e9es toutes les 5 secondes tout au long de l\u2019essai.       <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa24bd0 elementor-widget elementor-widget-heading\" data-id=\"aa24bd0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">R\u00e9sultats et discussion<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54513af elementor-widget elementor-widget-text-editor\" data-id=\"54513af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">L&rsquo;augmentation de la concentration en PhotoGel\u00ae de 5 % \u00e0 10 % (p\/v) a entra\u00een\u00e9 une augmentation du module de stockage en cisaillement final (G\u2032), qui est pass\u00e9 de 5 398 \u00b1 106 Pa \u00e0 39 437 \u00b1 1 251 Pa (***p &lt; 0,001). Parall\u00e8lement, la vitesse maximale de g\u00e9lification a augment\u00e9 de mani\u00e8re significative \u00e0 des concentrations plus \u00e9lev\u00e9es, passant de 23,2 \u00b1 13,3 Pa\/s \u00e0 5 % \u00e0 145,9 \u00b1 24,6 Pa\/s \u00e0 10 % (**p &lt; 0,01), ce qui indique un d\u00e9veloppement du r\u00e9seau nettement plus rapide dans des conditions de photopolym\u00e9risation identiques. Le temps d\u2019initiation a \u00e9galement \u00e9t\u00e9 nettement r\u00e9duit avec l\u2019augmentation de la concentration en PhotoGel\u00ae, passant de 11,35 \u00b1 0,04 min \u00e0 5 % \u00e0 5,36 \u00b1 0,34 min \u00e0 10 % (***p &lt; 0,001), ce qui d\u00e9montre un d\u00e9but de g\u00e9lification plus pr\u00e9coce.  <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-443aebb elementor-widget elementor-widget-text-editor\" data-id=\"443aebb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">La forte d\u00e9pendance de G\u2032 par rapport \u00e0 la concentration refl\u00e8te l&rsquo;augmentation de la teneur en polym\u00e8re et de la disponibilit\u00e9 des groupes photor\u00e9ticulables. La diminution du temps d\u2019initiation et l\u2019augmentation de la vitesse de g\u00e9lification \u00e0 10 % de PhotoGel\u00ae indiquent que des concentrations plus \u00e9lev\u00e9es en polym\u00e8re renforcent non seulement le r\u00e9seau final, mais acc\u00e9l\u00e8rent \u00e9galement le d\u00e9clenchement et la progression de la photopolym\u00e9risation. Dans l\u2019ensemble, ces r\u00e9sultats d\u00e9montrent que la concentration en PhotoGel\u00ae influe sur la cin\u00e9tique de g\u00e9lification et sur les propri\u00e9t\u00e9s m\u00e9caniques finales.  <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fa8e7e9 e-grid e-con-full e-con e-child\" data-id=\"fa8e7e9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1ea1d19 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"1ea1d19\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"871\" height=\"750\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?fit=871%2C750&amp;ssl=1\" class=\"attachment-large size-large wp-image-62826\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?w=871&amp;ssl=1 871w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?resize=300%2C258&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?resize=768%2C661&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?resize=87%2C75&amp;ssl=1 87w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?resize=700%2C603&amp;ssl=1 700w\" sizes=\"(max-width:767px) 700px, (max-width:871px) 100vw, 871px\" data-attachment-id=\"62826\" data-permalink=\"https:\/\/rheolution.com\/fr\/photogel_g-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?fit=871%2C750&amp;ssl=1\" data-orig-size=\"871,750\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"PhotoGel_G&amp;rsquo;\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_G.png?fit=871%2C750&amp;ssl=1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d420ba6 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"d420ba6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"746\" height=\"817\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?fit=746%2C817&amp;ssl=1\" class=\"attachment-large size-large wp-image-62810\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?w=746&amp;ssl=1 746w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?resize=274%2C300&amp;ssl=1 274w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?resize=68%2C75&amp;ssl=1 68w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?resize=700%2C767&amp;ssl=1 700w\" sizes=\"(max-width:767px) 700px, 746px\" data-attachment-id=\"62810\" data-permalink=\"https:\/\/rheolution.com\/fr\/photogel_start-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?fit=746%2C817&amp;ssl=1\" data-orig-size=\"746,817\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"PhotoGel_Start\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Start.png?fit=746%2C817&amp;ssl=1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2cc63de elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"2cc63de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"780\" height=\"759\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?fit=780%2C759&amp;ssl=1\" class=\"attachment-large size-large wp-image-62802\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?w=780&amp;ssl=1 780w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?resize=300%2C292&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?resize=768%2C747&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?resize=77%2C75&amp;ssl=1 77w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?resize=700%2C681&amp;ssl=1 700w\" sizes=\"(max-width:767px) 700px, (max-width:780px) 100vw, 780px\" data-attachment-id=\"62802\" data-permalink=\"https:\/\/rheolution.com\/fr\/photogel_speed-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?fit=780%2C759&amp;ssl=1\" data-orig-size=\"780,759\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"PhotoGel_Speed\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/PhotoGel_Speed.png?fit=780%2C759&amp;ssl=1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-069025e elementor-widget elementor-widget-text-editor\" data-id=\"069025e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><b>Figure 1.<\/b><span style=\"font-weight: 400\">  Module de stockage final sous cisaillement (G\u2032, \u00e0 gauche), temps d&rsquo;initiation (au centre, en minutes) et vitesse maximale de g\u00e9lification (\u00e0 droite ; Pa\/s) en comparant du PhotoGel\u00ae \u00e0 5 % et 10 % (p\/v) avec un durcissement \u00e0 405 nm. Moyenne \u00b1 \u00e9cart-type (n = 3). **p &lt; 0,01, ***p &lt; 0,001.  <\/span><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a19c2ed elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"a19c2ed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"875\" height=\"627\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?fit=875%2C627&amp;ssl=1\" class=\"attachment-large size-large wp-image-62818\" alt=\"\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?w=875&amp;ssl=1 875w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?resize=300%2C215&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?resize=768%2C550&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?resize=105%2C75&amp;ssl=1 105w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?resize=700%2C502&amp;ssl=1 700w\" sizes=\"(max-width:767px) 700px, (max-width:875px) 100vw, 875px\" data-attachment-id=\"62818\" data-permalink=\"https:\/\/rheolution.com\/fr\/gelma-hydrogel-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?fit=875%2C627&amp;ssl=1\" data-orig-size=\"875,627\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"GelMA Hydrogel\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GelMA-Hydrogel.jpeg?fit=875%2C627&amp;ssl=1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6327b34 elementor-widget elementor-widget-text-editor\" data-id=\"6327b34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><b>Figure 2.<\/b><span style=\"font-weight: 400\">  PhotoGel\u00ae apr\u00e8s photor\u00e9ticulation dans l&rsquo;ElastoSens\u2122 Bio.  <\/span><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ad5968 elementor-widget elementor-widget-heading\" data-id=\"8ad5968\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Conclusions et perspectives<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b7d7a98 elementor-widget elementor-widget-text-editor\" data-id=\"b7d7a98\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Le comportement m\u00e9canique des hydrogels GelMA \u2014 r\u00e9gi par la cin\u00e9tique de photor\u00e9ticulation, la densit\u00e9 du r\u00e9seau et la visco\u00e9lasticit\u00e9 en fonction du temps \u2014 est un facteur d\u00e9terminant de leurs performances biologiques et fonctionnelles. En tant que mat\u00e9riaux souples, hydrat\u00e9s et sensibles \u00e0 la lumi\u00e8re, les syst\u00e8mes GelMA n\u00e9cessitent des m\u00e9thodes de caract\u00e9risation permettant de suivre l\u2019\u00e9volution m\u00e9canique sans alt\u00e9rer le r\u00e9seau ni les conditions exp\u00e9rimentales. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aed2e2d elementor-widget elementor-widget-text-editor\" data-id=\"aed2e2d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">La caract\u00e9risation visco\u00e9lastique non destructive r\u00e9alis\u00e9e avec l&rsquo;ElastoSens\u2122 Bio permet :<\/span><\/p><ul><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Mesure pr\u00e9cise et reproductible de la cin\u00e9tique de g\u00e9lification du GelMA.<\/span><span style=\"font-weight: 400\"><br><\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Identification en temps r\u00e9el de la transition liquide-gel au cours de la photor\u00e9ticulation.<\/span><span style=\"font-weight: 400\"><br><\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Quantification de la rigidit\u00e9 finale dans des conditions pertinentes pour l&rsquo;application.<\/span><span style=\"font-weight: 400\"><br><\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Suivi longitudinal d&rsquo;un m\u00eame \u00e9chantillon afin d&rsquo;\u00e9valuer sa maturation ou sa d\u00e9gradation.<\/span><span style=\"font-weight: 400\"><br><\/span><\/li><li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Mesures st\u00e9riles et \u00e0 luminosit\u00e9 contr\u00f4l\u00e9e gr\u00e2ce au module de photostimulation int\u00e9gr\u00e9.<\/span><span style=\"font-weight: 400\"><br><\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-afd54d4 elementor-widget elementor-widget-text-editor\" data-id=\"afd54d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Ensemble, ces capacit\u00e9s permettent de mieux comprendre les relations structure-propri\u00e9t\u00e9, d&rsquo;am\u00e9liorer la reproductibilit\u00e9 des exp\u00e9riences et d&rsquo;assurer une transposition plus fiable des hydrogels GelMA dans les domaines de la biofabrication, de l&rsquo;ing\u00e9nierie tissulaire et des applications biom\u00e9dicales.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-794c36a elementor-widget elementor-widget-heading\" data-id=\"794c36a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">R\u00e9f\u00e9rences<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-27340c7 elementor-widget elementor-widget-text-editor\" data-id=\"27340c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400\">Yue, K., Trujillo-de Santiago, G., Alvarez, M. M., Tamayol, A., Annabi, N., &amp; Khademhosseini, A. (2015). Synthesis, properties, and biomedical applications of gelatin methacryloyl (GelMA) hydrogels.  <\/span>Biomaterials, 73, 254-271.<\/p><p><span style=\"font-weight: 400\">Bupphathong, S., Quiroz, C., Huang, W., Chung, P. F., Tao, H. Y., &amp; Lin, C. H. (2022). Gelatin methacrylate hydrogel for tissue engineering applications\u2014a review on material modifications.  <\/span>Pharmaceuticals, 15(2), 171.<\/p><p><span style=\"font-weight: 400\">Das, S., Jegadeesan, J. T., &amp; Basu, B. (2024). Gelatin methacryloyl (GelMA)-based biomaterial inks: process science for 3D\/4D printing and current status.  <\/span>Biomacromolecules, 25(4), 2156-2221.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9383078 elementor-widget__width-initial elementor-widget-mobile__width-inherit elementor--h-position-center elementor--v-position-middle elementor-arrows-position-inside elementor-widget elementor-widget-slides\" data-id=\"9383078\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;navigation&quot;:&quot;arrows&quot;,&quot;autoplay_speed&quot;:4000,&quot;transition_speed&quot;:4000,&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;infinite&quot;:&quot;yes&quot;,&quot;transition&quot;:&quot;slide&quot;}\" data-widget_type=\"slides.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div 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class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>D\u00e9couvrez comment notre technologie mesure de mani\u00e8re non destructive les propri\u00e9t\u00e9s visco\u00e9lastiques des biomat\u00e9riaux mous et des tissus en utilisant des micro-volumes d\u2019\u00e9chantillons<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c4ce1d0 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"c4ce1d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/rheolution.com\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contactez-nous pour plus 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data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"ALGINATE\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?fit=1024%2C340&amp;ssl=1\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?w=7000&amp;ssl=1 7000w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=300%2C100&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=1024%2C340&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=768%2C255&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=1536%2C510&amp;ssl=1 1536w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=2048%2C679&amp;ssl=1 2048w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=150%2C50&amp;ssl=1 150w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?resize=700%2C232&amp;ssl=1 700w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?w=2440&amp;ssl=1 2440w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/ALGINATE-1.jpg?w=3660&amp;ssl=1 3660w\" sizes=\"(max-width:767px) 700px, (max-width:7000px) 100vw, 7000px\" \/>\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-overlay\">\n\t\t\t\t\t\t\t\t<a class=\"elementor-icon\" href=\"https:\/\/rheolution.com\/fr\/notes-application\/hydrogels-dalginate\/\" target=\"_blank\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-screen-only\">Hydrogels d&rsquo;alginate<\/span>\n\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-content-wrapper \">\n\n\t\t\t\t\t<div class=\"premium-blog-inner-container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h4 class=\"premium-blog-entry-title\">\n\t\t\t<a href=\"https:\/\/rheolution.com\/fr\/notes-application\/hydrogels-dalginate\/\" target=\"_blank\">\n\t\t\t\tHydrogels d&rsquo;alginate\t\t\t<\/a>\n\t\t<\/h4>\n\t\t\t\t<div class=\"premium-blog-entry-meta\">\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<div class=\"premium-blog-content-inner-wrapper\">\n\t\t<p class=\"premium-blog-post-content\">Les hydrogels d'alginate sont des r\u00e9seaux polym\u00e8res tridimensionnels riches en eau, d\u00e9riv\u00e9s de l'alginate, un polysaccharide anionique d'origine naturelle. L'alginate est principalement extrait des parois cellulaires des algues brunes appartenant \u00e0 la classe des ph\u00e9ophyc\u00e9es, bien qu'il puisse \u00e9galement \u00eatre biosynth\u00e9tis\u00e9 par certaines esp\u00e8ces bact\u00e9riennes telles que les Azotobacter et les Pseudomonas. Sur le plan structurel, l\u2019alginate est un copolym\u00e8re lin\u00e9aire compos\u00e9 d\u2019acide \u03b2-D-mannuronique (unit\u00e9s M) et d\u2019acide \u03b1-L-guluronique (unit\u00e9s G), reli\u00e9s par des liaisons glycosidiques 1\u21924.<\/p><div class=\"premium-blog-excerpt-link-wrap\"><a href=\"https:\/\/rheolution.com\/fr\/notes-application\/hydrogels-dalginate\/\" target=\"_blank\" class=\"premium-blog-excerpt-link elementor-button\">Lire la suite \u00bb<\/a><\/div>\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<div class=\"premium-blog-post-outer-container\" data-total=\"3\">\n\t\t\t<div class=\"premium-blog-post-container premium-blog-skin-classic\">\n\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumb-effect-wrapper\">\n\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-container premium-blog-zoomin-effect\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"7875\" height=\"2612\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?fit=7875%2C2612&amp;ssl=1\" class=\"attachment-full size-full wp-image-63420\" alt=\"\" data-attachment-id=\"63420\" data-permalink=\"https:\/\/rheolution.com\/fr\/gelatin-methacrylate-2-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?fit=7875%2C2612&amp;ssl=1\" data-orig-size=\"7875,2612\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Gelatin Methacrylate\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?fit=1024%2C340&amp;ssl=1\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?w=7875&amp;ssl=1 7875w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=300%2C100&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=1024%2C340&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=768%2C255&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=1536%2C509&amp;ssl=1 1536w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=2048%2C679&amp;ssl=1 2048w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=150%2C50&amp;ssl=1 150w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?resize=700%2C232&amp;ssl=1 700w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?w=2440&amp;ssl=1 2440w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Gelatin-Methacrylate-1.jpg?w=3660&amp;ssl=1 3660w\" sizes=\"(max-width:767px) 700px, (max-width:7875px) 100vw, 7875px\" \/>\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-overlay\">\n\t\t\t\t\t\t\t\t<a class=\"elementor-icon\" href=\"https:\/\/rheolution.com\/fr\/notes-application\/gelma-hydrogels\/\" target=\"_blank\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-screen-only\">Hydrogels GelMA<\/span>\n\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-content-wrapper \">\n\n\t\t\t\t\t<div class=\"premium-blog-inner-container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h4 class=\"premium-blog-entry-title\">\n\t\t\t<a href=\"https:\/\/rheolution.com\/fr\/notes-application\/gelma-hydrogels\/\" target=\"_blank\">\n\t\t\t\tHydrogels GelMA\t\t\t<\/a>\n\t\t<\/h4>\n\t\t\t\t<div class=\"premium-blog-entry-meta\">\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<div class=\"premium-blog-content-inner-wrapper\">\n\t\t<p class=\"premium-blog-post-content\">La g\u00e9latine m\u00e9thacryloyle (GelMA) est un hydrogel photor\u00e9ticulable d\u00e9riv\u00e9 de la g\u00e9latine, elle-m\u00eame obtenue par hydrolyse partielle du collag\u00e8ne, la principale prot\u00e9ine structurelle de la matrice extracellulaire (MEC). Le GelMA est synth\u00e9tis\u00e9 par r\u00e9action de la g\u00e9latine avec de l'anhydride m\u00e9thacrylique, ce qui permet d'introduire des groupes fonctionnels m\u00e9thacryloyle sur les r\u00e9sidus d'acides amin\u00e9s de la g\u00e9latine tout en pr\u00e9servant la plupart de ses motifs bioactifs natifs.<\/p><div class=\"premium-blog-excerpt-link-wrap\"><a href=\"https:\/\/rheolution.com\/fr\/notes-application\/gelma-hydrogels\/\" target=\"_blank\" class=\"premium-blog-excerpt-link elementor-button\">Lire la suite \u00bb<\/a><\/div>\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<div class=\"premium-blog-post-outer-container\" data-total=\"3\">\n\t\t\t<div class=\"premium-blog-post-container premium-blog-skin-classic\">\n\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumb-effect-wrapper\">\n\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-container premium-blog-zoomin-effect\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"7875\" height=\"2612\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?fit=7875%2C2612&amp;ssl=1\" class=\"attachment-full size-full wp-image-63388\" alt=\"\" data-attachment-id=\"63388\" data-permalink=\"https:\/\/rheolution.com\/fr\/polydimethylsiloxane-pdms-2-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?fit=7875%2C2612&amp;ssl=1\" data-orig-size=\"7875,2612\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Polydimethylsiloxane (PDMS)\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?fit=1024%2C340&amp;ssl=1\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?w=7875&amp;ssl=1 7875w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=300%2C100&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=1024%2C340&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=768%2C255&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=1536%2C509&amp;ssl=1 1536w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=2048%2C679&amp;ssl=1 2048w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=150%2C50&amp;ssl=1 150w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?resize=700%2C232&amp;ssl=1 700w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?w=2440&amp;ssl=1 2440w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/Polydimethylsiloxane-PDMS-1.jpg?w=3660&amp;ssl=1 3660w\" sizes=\"(max-width:767px) 700px, (max-width:7875px) 100vw, 7875px\" \/>\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-overlay\">\n\t\t\t\t\t\t\t\t<a class=\"elementor-icon\" href=\"https:\/\/rheolution.com\/fr\/notes-application\/polymeres-pdms\/\" target=\"_blank\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-screen-only\">Polym\u00e8res PDMS<\/span>\n\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-content-wrapper \">\n\n\t\t\t\t\t<div class=\"premium-blog-inner-container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h4 class=\"premium-blog-entry-title\">\n\t\t\t<a href=\"https:\/\/rheolution.com\/fr\/notes-application\/polymeres-pdms\/\" target=\"_blank\">\n\t\t\t\tPolym\u00e8res PDMS\t\t\t<\/a>\n\t\t<\/h4>\n\t\t\t\t<div class=\"premium-blog-entry-meta\">\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<div class=\"premium-blog-content-inner-wrapper\">\n\t\t<p class=\"premium-blog-post-content\">Le polydim\u00e9thylsiloxane (PDMS) est un polym\u00e8re polysiloxane synth\u00e9tique compos\u00e9 d\u2019un squelette siloxane inorganique souple (\u2013Si\u2013O\u2013Si\u2013) comportant des groupes lat\u00e9raux m\u00e9thyle. Cette architecture inorganique-organique unique conf\u00e8re au PDMS une mobilit\u00e9 de cha\u00eene exceptionnelle, une tr\u00e8s basse temp\u00e9rature de transition vitreuse et un comportement \u00e9lastom\u00e8re stable sur une large plage de temp\u00e9ratures. Le PDMS est produit exclusivement par synth\u00e8se industrielle, impliquant g\u00e9n\u00e9ralement l\u2019hydrolyse et la condensation de chlorosilanes, suivies d\u2019une polym\u00e9risation par ouverture de cycle de siloxanes cycliques.<\/p><div class=\"premium-blog-excerpt-link-wrap\"><a href=\"https:\/\/rheolution.com\/fr\/notes-application\/polymeres-pdms\/\" target=\"_blank\" class=\"premium-blog-excerpt-link elementor-button\">Lire la suite \u00bb<\/a><\/div>\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t<div class=\"premium-blog-post-outer-container\" data-total=\"3\">\n\t\t\t<div class=\"premium-blog-post-container premium-blog-skin-classic\">\n\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumb-effect-wrapper\">\n\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-container premium-blog-zoomin-effect\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"7000\" height=\"2322\" src=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?fit=7000%2C2322&amp;ssl=1\" class=\"attachment-full size-full wp-image-63016\" alt=\"\" data-attachment-id=\"63016\" data-permalink=\"https:\/\/rheolution.com\/fr\/gelatin-5-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?fit=7000%2C2322&amp;ssl=1\" data-orig-size=\"7000,2322\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"GELATIN\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?fit=1024%2C340&amp;ssl=1\" srcset=\"https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?w=7000&amp;ssl=1 7000w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=300%2C100&amp;ssl=1 300w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=1024%2C340&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=768%2C255&amp;ssl=1 768w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=1536%2C510&amp;ssl=1 1536w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=2048%2C679&amp;ssl=1 2048w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=150%2C50&amp;ssl=1 150w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?resize=700%2C232&amp;ssl=1 700w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?w=2440&amp;ssl=1 2440w, https:\/\/i0.wp.com\/rheolution.com\/wp-content\/uploads\/GELATIN.jpg?w=3660&amp;ssl=1 3660w\" sizes=\"(max-width:767px) 700px, (max-width:7000px) 100vw, 7000px\" \/>\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-thumbnail-overlay\">\n\t\t\t\t\t\t\t\t<a class=\"elementor-icon\" href=\"https:\/\/rheolution.com\/fr\/notes-application\/hydrogels-de-gelatine\/\" target=\"_blank\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-screen-only\">Hydrogels de g\u00e9latine<\/span>\n\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"premium-blog-content-wrapper \">\n\n\t\t\t\t\t<div class=\"premium-blog-inner-container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<h4 class=\"premium-blog-entry-title\">\n\t\t\t<a href=\"https:\/\/rheolution.com\/fr\/notes-application\/hydrogels-de-gelatine\/\" target=\"_blank\">\n\t\t\t\tHydrogels de g\u00e9latine\t\t\t<\/a>\n\t\t<\/h4>\n\t\t\t\t<div class=\"premium-blog-entry-meta\">\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<div class=\"premium-blog-content-inner-wrapper\">\n\t\t<p class=\"premium-blog-post-content\">Les hydrogels de g\u00e9latine sont des r\u00e9seaux polym\u00e8res tridimensionnels gonfl\u00e9s d'eau, d\u00e9riv\u00e9s de la g\u00e9latine, un polypeptide naturel obtenu par hydrolyse partielle du collag\u00e8ne. Le collag\u00e8ne est l\u2019une des prot\u00e9ines structurelles les plus abondantes dans la matrice extracellulaire des tissus des mammif\u00e8res, et sa d\u00e9naturation donne naissance \u00e0 la g\u00e9latine, dont la structure mol\u00e9culaire lin\u00e9aire est riche en s\u00e9quences d\u2019acides amin\u00e9s de type Gly\u2013X\u2013Y, principalement compos\u00e9es de glycine, de proline et d\u2019hydroxyproline.<\/p><div class=\"premium-blog-excerpt-link-wrap\"><a href=\"https:\/\/rheolution.com\/fr\/notes-application\/hydrogels-de-gelatine\/\" target=\"_blank\" class=\"premium-blog-excerpt-link elementor-button\">Lire la suite \u00bb<\/a><\/div>\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div class=\"premium-blog-footer\">\n\t\t\t\t\t\t\t<nav class=\"premium-blog-pagination-container\" role=\"navigation\" aria-label=\"Pagination\">\n\t\t\t\t<span aria-current=\"page\" class=\"page-numbers current\">1<\/span>\n<a class=\"page-numbers\" href=\"https:\/\/rheolution.com\/fr\/wp-json\/wp\/v2\/posts\/65557\/page\/2\/\">2<\/a>\n<a class=\"page-numbers\" href=\"https:\/\/rheolution.com\/fr\/wp-json\/wp\/v2\/posts\/65557\/page\/3\/\">3<\/a>\n<a class=\"next page-numbers\" href=\"https:\/\/rheolution.com\/fr\/wp-json\/wp\/v2\/posts\/65557\/page\/2\/\">Suivant \u00bb<\/a>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>La g\u00e9latine m\u00e9thacryloyle (GelMA) est un hydrogel photor\u00e9ticulable d\u00e9riv\u00e9 de la g\u00e9latine, elle-m\u00eame obtenue par hydrolyse partielle du collag\u00e8ne, la principale prot\u00e9ine structurelle de la matrice extracellulaire (MEC). Le GelMA est synth\u00e9tis\u00e9 par r\u00e9action de la g\u00e9latine avec de l&rsquo;anhydride m\u00e9thacrylique, ce qui permet d&rsquo;introduire des groupes fonctionnels m\u00e9thacryloyle sur les r\u00e9sidus d&rsquo;acides amin\u00e9s de la g\u00e9latine tout en pr\u00e9servant la plupart de ses motifs bioactifs natifs.   <\/p>\n","protected":false},"author":195401359,"featured_media":63420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[285,333],"tags":[89,124,88,261],"class_list":["post-65557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-notes-application","category-polymer-library","tag-elastosens-bio","tag-life-sciences","tag-mechanical-testing","tag-polymer"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hydrogels GelMA : 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