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High-precision 3D inkjet technology for live cell bioprinting

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Daisuke Takagi, Waka Lin, Takahiko Matsumoto, Hidekazu Yaginuma, Natsuko Hemmi, Shigeo Hatada, Manabu Seo

Abstract


In recent years, bioprinting has emerged as a promising technology for the construction of three-dimensional (3D) tissues to be used in regenerative medicine or in vitro screening applications. In the present study, we present the development of an inkjet-based bioprinting system to arrange multiple cells and materials precisely into structurally organized constructs. A novel inkjet printhead has been specially designed for live cell ejection. Droplet formation is powered by piezoelectric membrane vibrations coupled with mixing movements to prevent cell sedimentation at the nozzle. Stable drop-on-demand dispensing and cell viability were validated over an adequately long time to allow the fabrication of 3D tissues. Reliable control of cell number and spatial positioning was demonstrated using two separate suspensions with different cell types printed sequentially. Finally, a process for constructing stratified Mille-Feuille-like 3D structures is proposed by alternately superimposing cell suspensions and hydrogel layers with a controlled vertical resolution. The results show that inkjet technology is effective for both two-dimensional patterning and 3D multilayering and has the potential to facilitate the achievement of live cell bioprinting with an unprecedented level of precision.

Keywords


drop-on-demand; 3D tissue engineering, drug discovery, regenerative medicine, and hydrogel

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DOI: http://dx.doi.org/10.18063/ijb.v5i2.208

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Copyright (c) 2019 Daisuke Takagi, Waka Lin, Takahiko Matsumoto, Hidekazu Yaginuma, Natsuko Hemmi, Shigeo Hatada, Manabu Seo

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