{"id":31497,"date":"2025-04-15T15:27:46","date_gmt":"2025-04-15T15:27:46","guid":{"rendered":"https:\/\/amelie-project.eu\/?post_type=publication&#038;p=31497"},"modified":"2025-12-17T16:46:58","modified_gmt":"2025-12-17T16:46:58","slug":"ct-sichtbare-mikrokugeln-ermoglichen-die-in-vivo-verfolgung-von-injizierbaren-tissue-engineering-gerusten-am-ganzen-korper","status":"publish","type":"publication","link":"https:\/\/amelie-project.eu\/de\/veroffentlichung\/ct-sichtbare-mikrokugeln-ermoglichen-die-in-vivo-verfolgung-von-injizierbaren-tissue-engineering-gerusten-am-ganzen-korper\/","title":{"rendered":"CT-sichtbare Mikrosph\u00e4ren erm\u00f6glichen In-vivo-Ganzk\u00f6rper-Tracking von injizierbaren Tissue Engineering Scaffolds"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;4.21.0&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; width=&#8221;100%&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.21.0&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<!-- divi:paragraph --><\/p>\n<p><strong>Annalisa Bettini, Peter Stephen Patrick, Richard M. Day, Daniel J. Stuckey.<\/strong><\/p>\n<p>Fortschrittliche Materialien f\u00fcr das Gesundheitswesen. 2024;13(17).<\/p>\n<p><em>Zusammenfassung<\/em><\/p>\n<p>Im Rahmen dieser Studie wurden winzige schwammartige K\u00fcgelchen (so genannte Mikrotr\u00e4ger) entwickelt, die therapeutische Zellen tragen k\u00f6nnen und - was besonders wichtig ist - auf medizinischen Bildgebungsaufnahmen deutlich zu sehen sind. Die Forscher f\u00fcgten ein harmloses Kontrastmittel, Bariumsulfat, hinzu, so dass die K\u00fcgelchen nach ihrer Injektion in den K\u00f6rper auf Computertomografiescans (CT) zu sehen sind. Auf diese Weise k\u00f6nnen die \u00c4rzte verfolgen, wohin das implantierte Material gelangt, wie lange es an Ort und Stelle bleibt und ob die transplantierten Zellen am Leben bleiben. In Labortests und Tierversuchen erwiesen sich die K\u00fcgelchen als sicher, lie\u00dfen Zellen darauf wachsen und blieben auf Scans mindestens zwei Wochen lang sichtbar. Die Mikrok\u00fcgelchen k\u00f6nnten auch durch minimalinvasive Injektionen, auch in das Herz, verabreicht werden. Insgesamt k\u00f6nnte diese Technologie dazu beitragen, regenerative Therapien zu verbessern, indem sie sicherstellt, dass implantierte zelltragende Ger\u00fcste den richtigen Ort erreichen und dort verbleiben - und \u00c4rzten gleichzeitig die M\u00f6glichkeit gibt, die Behandlung in Echtzeit zu \u00fcberwachen.<\/p>\n<p><em>Abstrakt<\/em><\/p>\n<p><span style=\"font-size: 18px;\">Gezielte Abgabe und Verbleib sind wesentliche Voraussetzungen f\u00fcr implantierbare Produkte aus Gewebez\u00fcchtungen. Nicht-invasive bildgebende Verfahren, die die Lokalisierung, den Verbleib und die Biodistribution transplantierter Zellen auf implantierten Tissue-Engineering-Ger\u00fcsten best\u00e4tigen k\u00f6nnen, sind von unsch\u00e4tzbarem Wert f\u00fcr die Optimierung und Verbesserung regenerativer Therapien. Um diesem Bedarf gerecht zu werden, wurde ein injizierbares Tissue-Engineering-Ger\u00fcst, das aus hochpor\u00f6sen, mit der Transplantation von Zellen kompatiblen Mikrok\u00fcgelchen besteht, so modifiziert, dass es das Computertomographie (CT)-Kontrastmittel Bariumsulfat (BaSO4) enth\u00e4lt. Die verfolgbaren Mikrokugeln weisen eine hohe R\u00f6ntgenabsorption auf, wobei der Kontrast eine Verfolgung des gesamten K\u00f6rpers erm\u00f6glicht. Die Mikrokugeln sind mit GFP+ Luciferase+ mesenchymalen Stammzellen zellul\u00e4risiert und zeigen in vitro Biokompatibilit\u00e4t. In vivo werden zellularisierte, mit BaSO4 beladene Mikrosph\u00e4ren in die Hintergliedma\u00dfen von M\u00e4usen eingebracht, wo sie 14 Tage lang lebensf\u00e4hig bleiben. Die Koregistrierung von 3D-Biolumineszenzbildern und \u00b5CT-Rekonstruktionen erm\u00f6glicht die Beurteilung des Ger\u00fcstmaterials und der Zellko-Lokalisation. Die verfolgbaren Mikrosph\u00e4ren sind auch mit der minimal-invasiven Verabreichung durch ultraschallgef\u00fchrte transthorakale intramyokardiale Injektionen bei Ratten kompatibel. Diese Ergebnisse deuten darauf hin, dass mit BaSO4 beladene Mikrosph\u00e4ren als neuartiges Instrument zur Optimierung von Verabreichungstechniken und zur Verfolgung der Persistenz und Verteilung von implantierten Ger\u00fcstmaterialien verwendet werden k\u00f6nnen. Dar\u00fcber hinaus k\u00f6nnen die Mikrosph\u00e4ren zellularisiert werden und haben das Potenzial, zu einem injizierbaren, gewebez\u00fcglichen Kombinationsprodukt f\u00fcr die Herzregeneration entwickelt zu werden.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><!-- \/divi:paragraph --><\/p>\n<p>Hier finden Sie das vollst\u00e4ndige Papier:<\/p>\n<p><a href=\"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/full\/10.1002\/adhm.202303588\">https:\/\/advanced.onlinelibrary.wiley.com\/doi\/full\/10.1002\/adhm.202303588<\/a>\u00a0<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><!-- \/divi:paragraph -->[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>","protected":false},"excerpt":{"rendered":"<p>Annalisa Bettini, Peter Stephen Patrick, Richard M. Day, Daniel J. Stuckey. Advanced Healthcare Materials. 2024;13(17). Summary This study developed tiny sponge-like beads (called microcarriers) that can carry therapeutic cells and, importantly, can be seen clearly on medical imaging scans. The researchers added a harmless contrast material, barium sulphate, so the beads show up on computed tomography (CT) scans after they are injected into the body. This makes it possible for doctors to track where the implanted material goes, how long it stays in place, and whether the transplanted cells remain alive. In laboratory tests and in animal studies, the beads were safe, allowed cells to grow on them, and stayed visible on scans for at least two weeks. The microspheres could also be delivered through minimally invasive injections, including into the heart. Overall, this technology could help improve regenerative therapies by ensuring that implanted cell-carrying scaffolds reach the right location and stay there \u2013 while giving doctors a way to monitor the treatment in real time. Abstract Targeted delivery and retention are essential requirements for implantable tissue-engineered products. Non-invasive imaging methods that can confirm location, retention, and biodistribution of transplanted cells attached to implanted tissue engineering scaffolds will be invaluable [&hellip;]<\/p>","protected":false},"featured_media":31499,"template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"<!-- wp:paragraph -->\n<p>Charlotte Desprez, Davide Danovi, Charles H Knowles and Richard M Day.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>J. Tissue Eng. 2023;14:1\u201318.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><em>Abstract<\/em><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>Skeletal muscle-derived cells (SMDC) hold tremendous potential for replenishing dysfunctional muscle lost due to disease or trauma. Current therapeutic usage of SMDC relies on harvesting autologous cells from muscle biopsies that are subsequently expanded in vitro before re-implantation into the patient. Heterogeneity can arise from multiple factors including quality of the starting biopsy, age and comorbidity affecting the processed SMDC. Quality attributes intended for clinical use often focus on minimum levels of myogenic cell marker expression. Such approaches do not evaluate the likelihood of SMDC to differentiate and form myofibres when implanted in vivo, which ultimately determines the likelihood of muscle regeneration. Predicting the therapeutic potency of SMDC in vitro prior to implantation is key to developing successful therapeutics in regenerative medicine and reducing implementation costs. Here, we report on the development of a novel SMDC profiling tool to examine populations of cells in vitro derived from different donors. We developed an image-based pipeline to quantify morphological features and extracted cell shape descriptors. We investigated whether these could predict heterogeneity in the formation of myotubes and correlate with the myogenic fusion index. Several of the early cell shape characteristics were found to negatively correlate with the fusion index. These included total area occupied by cells, area shape, bounding box area, compactness, equivalent diameter, minimum ferret diameter, minor axis length and perimeter of SMDC at 24 h after initiating culture. The information extracted with our approach indicates live cell imaging can detect a range of cell phenotypes based on cell-shape alone and preserving cell integrity could be used to predict propensity to form myotubes in vitro and functional tissue in vivo.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>Access the full paper here:&nbsp;<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/36949843\/\">https:\/\/pubmed.ncbi.nlm.nih.gov\/36949843\/<\/a><\/p>\n<!-- \/wp:paragraph -->","_et_gb_content_width":"","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_links_to":"","_links_to_target":""},"categories":[43],"class_list":["post-31497","publication","type-publication","status-publish","has-post-thumbnail","hentry","category-publication"],"_links":{"self":[{"href":"https:\/\/amelie-project.eu\/de\/wp-json\/wp\/v2\/publication\/31497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/amelie-project.eu\/de\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/amelie-project.eu\/de\/wp-json\/wp\/v2\/types\/publication"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/amelie-project.eu\/de\/wp-json\/wp\/v2\/media\/31499"}],"wp:attachment":[{"href":"https:\/\/amelie-project.eu\/de\/wp-json\/wp\/v2\/media?parent=31497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/amelie-project.eu\/de\/wp-json\/wp\/v2\/categories?post=31497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}