TY - JOUR A1 - Thielemann, Christiane A1 - Krstić, Nenad A1 - Jüttner, Jens A1 - Giegerich, Lars A1 - Mayer, Margot A1 - Knuth, Monika A1 - Müller, Achim T1 - 3D printed biosensor for continuous glucose measurement in cell cultures T2 - Annals of 3D Printed Medicine N2 - A novel 3D-printed glucose sensor is presented for cell culture application. Glucose sensing was performed using a fluorescence resonance energy transfer (FRET)-based assay principle based on ConA and dextran. Both molecules are encapsulated in alginate microspheres and embedded in the UV-curable, stable hydrogel polyvinyl alcohol (PVA). The rheology of the formulation was adapted to obtain good properties for an extrusion-based printing process. The printed sensor structures were tested for their ability to detect glucose in vitro. A proportional increase in fluorescence intensity was observed in a concentration range of 0 - 2 g/L glucose. Tests with HEK cell cultures also showed good cell compatibility and excellent adhesion properties on plasma-treated Petri dishes. The printed sensors were able to detect the glucose decay associated with the metabolic activities of the fast-growing HEK cells in the cell culture medium over ten days. The proof-of-principle study shows that metabolic processes in cell cultures can be monitored with the new printed sensor using a standard fluorescence wide-field microscope. KW - Bioprinting, FRET, Enzyme-free glucose sensor, PVA hydrogel KW - Biosensor KW - 3D-Druck KW - Zellkultur Y1 - 2023 UR - https://opus4.kobv.de/opus4-h-ab/frontdoor/index/index/docId/2086 VL - 2023 IS - - SP - - EP - - ER -