3D Printed Stem-Cell Derived Neural Progenitors Generate Spinal Cord Scaffolds
Daeha Joung1, Vincent Truong2, Colin C Neitzke2
1Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Advanced Functional Materials
|June 30, 2020
Summary
Researchers developed a 3D bioprinting method to create engineered spinal cords using stem cells. This technique precisely positions cells to rebuild neural connections, offering hope for treating spinal cord injuries.
Area of Science:
- Biomaterials Science
- Neuroscience
- Regenerative Medicine
Background:
- Spinal cord injury (SCI) and other central nervous system (CNS) diseases cause significant neurological damage.
- Current treatments for CNS damage have limited efficacy in restoring lost function.
- Advanced tissue engineering strategies are needed to repair complex neural architectures.
Purpose of the Study:
- To develop a 3D bioprinting platform for fabricating bioengineered spinal cord tissue.
- To precisely pattern induced pluripotent stem cell (iPSC)-derived spinal neuronal progenitor cells (sNPCs) and oligodendrocyte progenitor cells (OPCs) within biocompatible scaffolds.
- To create functional neural networks for potential therapeutic applications in CNS repair.
Main Methods:
- Extrusion-based multi-material 3D bioprinting was employed to fabricate scaffolds.
- iPSC-derived sNPCs and OPCs were precisely positioned using a point-dispensing method within microscale channels.
- The differentiation and axonal extension of bioprinted sNPCs were assessed, and neuronal network activity was confirmed via calcium flux studies.
Main Results:
- Successful fabrication of a bioengineered spinal cord construct with spatially controlled cell placement.
- Demonstrated differentiation and axonal growth of sNPCs within the 3D printed scaffold channels.
- Confirmed physiological activity of the engineered neuronal networks through spontaneous calcium flux.
- Validated a multicellular approach combining sNPCs and OPCs for neural tissue engineering.
Conclusions:
- The developed 3D bioprinting platform enables precise patterning of neural progenitor and glial cells.
- This technology facilitates the creation of biomimetic scaffolds that model CNS tissue architecture.
- The approach holds promise for developing new clinical strategies to treat neurological diseases, including spinal cord injury.
- This method can aid in rebuilding functional axonal connections in damaged CNS tissue.
