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Updated: Jul 13, 2026
Anatomically Inspired Three-dimensional Micro-tissue Engineered Neural Networks for Nervous System Reconstruction, Modulation, and Modeling
Published on: May 31, 2017
In vitro neural injury model for optimization of tissue-engineered constructs
D Kacy Cullen1, Sarah E Stabenfeldt, Crystal M Simon
1Wallace H. Coulter Department of Biomedical Engineering, Institute for Bioengineering and Bioscience, Laboratory for Neuroengineering, Georgia Institute of Technology/Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA.
Developing a 3-D in vitro model for traumatic brain injury (TBI) aids in testing tissue engineering strategies. This model shows mechanical injury, not astrogliosis, reduces neural stem cell (NSC) survival, but scaffolds improve survival.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Regenerative Medicine
Background:
- Traumatic brain injury (TBI) treatment via stem cell transplantation faces challenges due to high donor cell death.
- Tissue engineering offers potential solutions by enhancing cell survival through structural and adhesive support.
- Current optimization methods rely on costly and time-intensive in vivo studies.
Purpose of the Study:
- To develop a novel 3-D in vitro model simulating the injured host-transplant interface for high-throughput screening of tissue-engineered strategies.
- To investigate the impact of mechanical injury versus astrogliosis on neural stem cell (NSC) survival.
- To evaluate the efficacy of a methylcellulose-laminin (MC-LN) scaffold in improving NSC survival in a TBI model.
Main Methods:
- Established 3-D neuronal-astrocytic cocultures subjected to mechanical injury or TGF-beta1 treatment.
- Delivered neural stem cells (NSCs) to these cocultures and quantified donor cell death using TUNEL and caspase assays.
- Assessed the protective effect of methylcellulose (MC) and methylcellulose-laminin (MC-LN) scaffolds on NSC survival.
Main Results:
- Mechanical injury significantly increased donor NSC death (TUNEL+ cells) compared to TGF-beta1 treatment or controls.
- Astrogliosis induced by TGF-beta1 did not significantly impact NSC viability.
- Co-delivery of NSCs with MC or MC-LN scaffolds significantly reduced apoptosis (caspase+ cells) in mechanically injured cocultures.
Conclusions:
- The developed 3-D in vitro model serves as an effective pre-animal test bed for evaluating tissue-engineered therapies for TBI.
- Mechanical injury, rather than astrogliosis, is a primary factor limiting donor cell survival post-transplantation.
- Tissue engineering approaches, specifically MC-LN scaffolds, show promise in enhancing NSC survival for neural transplantation in TBI.
