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For developing new stem cell separation tool, we have prepared thermoresponsive cationic copolymer brush, poly(N-isopropylacrylamide-co-N,N-dimethylaminopropylacrylamide-co-N-tert-butylacrylamide (IPAAm-co-DMAPAAm-co-tBAAm) on glass substrates through surface-initiated atom transfer radical copolymerization (ATRP). Using the prepared thermoresponsive cationic copolymer brush, mesenchymal stem cell...
PIPAAm grafted polystyrene (PIPAAm-Pst) dishes were prepared using visible light irradiation and polystyrene dishes modified with thioxanethone-based photoinitiator. At optimized preparation conditions, PIPAAm-PSs fabricating cell sheets were successfully prepared by 5 mins visible light irradiation. After PIPAAm polymerization, micro-patterned temperature responsive polystyrene culture surface (MPTRCS)...
Spheroids that are formed from aggregated cells enhance biological function compared to monolayer culture. In particular, hetero-spheroids composed of different types of cells, such as hepatocytes and endothelial cells, express tissue specific functions at a high level, which is advantageous for more precise drug screening and biological research. In this study, we propose rapid formation of three-dimensional...
Our laboratory developed “cell sheet engineering”, which has been applied to regenerative medicine. However, the applications are restricted to the transplants of single-, double-, and triple-layered cell sheets, because of the poor supplies of nutrients and oxygen. To fabricate thicker and dense tissues in vitro, multi-layered cell sheets require to have capillary networks. Additionally, individual...
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