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Interfacing 3D Engineered Neuronal Cultures to Micro-Electrode Arrays: An Innovative In Vitro Experimental Model
Published on: October 18, 2015
Microfluidic engineered high cell density three-dimensional neural cultures
D Kacy Cullen1, Jelena Vukasinovic, Ari Glezer
1Wallace H Coulter Department of Biomedical Engineering, Parket H Petit Institute for Bioengineering and Bioscience, Laboratory for Neuroengineering, Georgia Institute of Technology, Atlanta, GA, USA. dkacy@neuro.gatech.edu
Journal of Neural Engineering
|April 6, 2007
Summary
A novel perfusion platform enhances survival in high-density three-dimensional (3D) neural cultures by improving mass transport. This technology supports engineered neural constructs, crucial for advanced neurobiological research.
Area of Science:
- Neuroscience
- Biotechnology
- Tissue Engineering
Background:
- Three-dimensional (3D) neural cultures offer a more biologically relevant model than 2D cultures due to in vivo-like cell-matrix and cell-cell interactions.
- High cell densities in thick 3D neural cultures are limited by diffusion-impaired mass transport, leading to cell death and matrix degradation.
Purpose of the Study:
- To develop and validate a novel perfusion platform to overcome mass transport limitations in high-density 3D neural cultures.
- To enhance cell viability and preserve tissue structure in engineered neural constructs.
Main Methods:
- Development of a perfusion platform utilizing forced intercellular convection to improve mass transport in thick 3D neural cultures (>500 microm).
- Comparison of cell viability and matrix integrity in perfused versus non-perfused cultures at varying cell densities (up to 10^4 cells mm^-3) and perfusion rates (2.0-11.0 microL min^-1).
- Assessment of survival dependency on proximity to the perfusion source at different flow rates.
Main Results:
- Passive diffusion supported low cell densities (
- Continuous medium perfusion significantly improved viability in high-density (10^4 cells mm^-3) 3D neuronal and neuronal-astrocytic co-cultures compared to non-perfused controls.
- Optimal perfusion rates (10.0-11.0 microL min^-1) ensured >90% cell viability independent of distance from the perfusion source, preserving cell density.
Conclusions:
- Forced interstitial convection via the novel perfusion platform effectively enhances mass transport and improves survival in high-density 3D engineered neural constructs.
- This technology is crucial for developing advanced tissue-engineered systems that accurately recapitulate 3D cell-cell and cell-matrix interactions for neurobiological studies.
