3D Functional Neuronal Networks in Free-Standing Bioprinted Hydrogel Constructs.

Autor: Yao Y; Department of Materials Science and Engineering, Monash University, Clayton, VIC, 3800, Australia.; School of Physics, The University of Melbourne, Parkville, VIC, 3010, Australia., Coleman HA; Department of Physiology, Monash University, Clayton, VIC, 3800, Australia., Meagher L; Department of Materials Science and Engineering, Monash University, Clayton, VIC, 3800, Australia.; ARC Training Centre for Cell and Tissue Engineering Technologies, Monash University, Clayton, VIC, 3800, Australia., Forsythe JS; Department of Materials Science and Engineering, Monash University, Clayton, VIC, 3800, Australia.; ARC Training Centre for Cell and Tissue Engineering Technologies, Monash University, Clayton, VIC, 3800, Australia., Parkington HC; Department of Physiology, Monash University, Clayton, VIC, 3800, Australia.
Jazyk: angličtina
Zdroj: Advanced healthcare materials [Adv Healthc Mater] 2023 Nov; Vol. 12 (28), pp. e2300801. Date of Electronic Publication: 2023 Jul 09.
DOI: 10.1002/adhm.202300801
Abstrakt: The composition, elasticity, and organization of the extracellular matrix within the central nervous system contribute to the architecture and function of the brain. From an in vitro modeling perspective, soft biomaterials are needed to mimic the 3D neural microenvironments. While many studies have investigated 3D culture and neural network formation in bulk hydrogel systems, these approaches have limited ability to position cells to mimic sophisticated brain architectures. In this study, cortical neurons and astrocytes acutely isolated from the brains of rats are bioprinted in a hydrogel to form 3D neuronal constructs. Successful bioprinting of cellular and acellular strands in a multi-bioink approach allows the subsequent formation of gray- and white-matter tracts reminiscent of cortical structures. Immunohistochemistry shows the formation of dense, 3D axon networks. Calcium signaling and extracellular electrophysiology in these 3D neuronal networks confirm spontaneous activity in addition to evoked activities under pharmacological and electrical stimulation. The system and bioprinting approaches are capable of fabricating soft, free-standing neuronal structures of different bioink and cell types with high resolution and throughput, which provide a promising platform for understanding fundamental questions of neural networks, engineering neuromorphic circuits, and for in vitro drug screening.
(© 2023 The Authors. Advanced Healthcare Materials published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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