{"id":23612,"date":"2020-09-08T10:23:28","date_gmt":"2020-09-08T10:23:28","guid":{"rendered":"https:\/\/www.leibniz-inm.de\/printed-degradable-optical-waveguides-for-guiding-light-into-tissue-2\/"},"modified":"2020-09-08T11:54:57","modified_gmt":"2020-09-08T11:54:57","slug":"printed-degradable-optical-waveguides-for-guiding-light-into-tissue-2","status":"publish","type":"post","link":"https:\/\/www.leibniz-inm.de\/en\/news-en\/printed-degradable-optical-waveguides-for-guiding-light-into-tissue-2\/","title":{"rendered":"Printed Degradable Optical Waveguides for Guiding Light into Tissue"},"content":{"rendered":"<p>Optogenetics and photonic technologies are changing the future of medicine. To implement light\u2010based therapies in the clinic, patient\u2010friendly devices that can deliver light inside the body while offering tunable properties and compatibility with soft tissues are needed.<\/p>\n<p>An article by Jun Feng et al. published in Advanced Functional Materials is dedicated to this topic.<!--more--><\/p>\n<p><a href=\"https:\/\/doi.org\/10.1002\/adfm.202004327\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1002\/adfm.202004327<\/a><\/p>\n<p>Abstract:<\/p>\n<p>Optogenetics and photonic technologies are changing the future of medicine. To implement light\u2010based therapies in the clinic, patient\u2010friendly devices that can deliver light inside the body while offering tunable properties and compatibility with soft tissues are needed. Here extrusion printing of degradable, hydrogel\u2010based optical waveguides with optical losses as low as 0.1 dB cm<sup>\u22121<\/sup>\u00a0at visible wavelengths is described. Core\u2010only and core\u2010cladding fibers are printed at room temperature from polyethylene glycol (PEG)\u2010based and PEG\/Pluronic precursors, and cured by in situ photopolymerization. The obtained waveguides are flexible, with mechanical properties tunable within a tissue\u2010compatible range. Degradation times are also tunable by adjusting the molar mass of the diacrylate gel precursors, which are synthesized by linking PEG diacrylate (PEGDA) with varying proportions of DL\u2010dithiothreitol (DTT). The printed waveguides are used to activate photochemical and optogenetic processes in close\u2010to\u2010physiological environments. Light\u2010triggered migration of cells in a photoresponsive 3D hydrogel and drug release from an optogenetically\u2010engineered living material by delivering light across &gt;5 cm of muscle tissue are demonstrated. These results quantify the in vitro performance, and reflect the potential of the printed degradable fibers for in vivo and clinical applications.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Optogenetics and photonic technologies are changing the future of medicine. To implement light\u2010based therapies in the clinic, patient\u2010friendly devices that can deliver light inside the body while offering tunable properties and compatibility with soft tissues are needed. An article by Jun Feng et al. published in Advanced Functional Materials is dedicated to this topic.<\/p>\n","protected":false},"author":1,"featured_media":31147,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76],"class_list":["post-23612","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Printed Degradable Optical Waveguides for Guiding Light into Tissue - INM<\/title>\n<meta name=\"description\" content=\"Printed Degradable Optical Waveguides for Guiding Light into Tissue \u2013 Ein Forschungsbeitrag des Leibniz-Instituts f\u00fcr Neue Materialien (INM).\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.leibniz-inm.de\/en\/news-en\/printed-degradable-optical-waveguides-for-guiding-light-into-tissue-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Printed Degradable Optical Waveguides for Guiding Light into Tissue - INM\" \/>\n<meta property=\"og:description\" content=\"Printed Degradable Optical Waveguides for Guiding Light into Tissue \u2013 Ein Forschungsbeitrag des Leibniz-Instituts f\u00fcr Neue Materialien (INM).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.leibniz-inm.de\/en\/news-en\/printed-degradable-optical-waveguides-for-guiding-light-into-tissue-2\/\" \/>\n<meta property=\"og:site_name\" content=\"INM\" \/>\n<meta property=\"article:published_time\" content=\"2020-09-08T10:23:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-09-08T11:54:57+00:00\" \/>\n<meta property=\"og:image\" 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