direct-write bioprinting approach to construct multilayer cellular tissues

direct-write bioprinting approach to construct multilayer cellular tissues

;Elahe Masaeli;Elahe Masaeli;Christophe Marquette
china and the global economy in the 21st century 2020 Vol. 7 pp. -
162
masaeli2020frontiersdirect-write

Abstract

As a cellular-assembly technique, bioprinting has been extensively used in tissue engineering and regenerative medicine to construct hydrogel-based three-dimensional (3D) tissue-like models with prescribed geometry. Here, we introduced a unique direct-write bioprinting strategy to fabricate a bilayer flat tissue in a hydrogel-free approach. A printed retina pigmented epithelium layer (RPE) was applied as living biopaper for positioning a fibroblast layer without using any hydrogel in bioink. We adjusted the number of cells in the inkjet droplets in order to obtain a uniform printed cell layer and demonstrated the formation of a bilayer construct through confocal imaging. Since our printing system introduced low levels of shear stress to the cells, it did not have a negative effect on cell survival, although cell viability was generally lower than that of control group over 1 week post-printing. In conclusion, our novel direct-write bioprinting approach to spatiotemporally position different cellular layers may represent an efficient tool to develop living constructs especially for regeneration of complex flat tissues.

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0x95644003c57E6F55A65596E3D9Eac6813e3566dA
Article ID:
162232
Unique Identifier:
10.3389/fbioe.2019.00478
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