Related Experiment Video
Updated: May 20, 2025
07:48
Microgel-Extracellular Matrix Composite Support for the Embedded 3D Printing of Human Neural Constructs
Published on: May 5, 2023
1.3K
Bioprinted Microchannel Scaffolds Modulate Neuronal Differentiation of Encapsulated Human Spinal Cord Progenitor
Christy Kwokdinata1, Kyra Chai1, Kieran Lau1,2
1School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore.
ACS Applied Bio Materials
|May 2, 2025
Summary
Human induced pluripotent stem cells-derived spinal cord progenitor cells (SCPCs) were encapsulated in hydrogel scaffolds using 3D bioprinting for spinal cord injury treatment. Material composition and stiffness significantly influenced neural differentiation, offering a promising therapeutic strategy.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Neuroscience
Background:
- Spinal cord injuries (SCIs) present significant therapeutic challenges.
- Human induced pluripotent stem cells-derived spinal cord progenitor cells (hSCPCs) offer potential for neural repair.
- 3D bioprinting technologies enable the creation of complex scaffolds for cell delivery.
Purpose of the Study:
- To develop and optimize 3D bioprinted hydrogel scaffolds for encapsulating hSCPCs.
- To investigate the impact of scaffold material composition and stiffness on hSCPC differentiation.
- To assess the potential of these scaffolds for SCI treatment.
Main Methods:
- Digital Light Processing (DLP) bioprinting was used to fabricate gelatin methacrylate (GelMA)-based hydrogel microchannel scaffolds.
- hSCPCs were encapsulated within GelMA bioinks.
- Mechanical properties were assessed via degradation studies and compression testing.
- Neuronal differentiation was quantified using immunofluorescence staining.
Main Results:
- Scaffolds with higher GelMA concentration (10%) promoted significantly greater motor neuronal differentiation (9.4%) compared to lower concentrations (3.7%).
- Scaffolds with lower GelMA concentration enhanced interneuron differentiation (7.3%) compared to higher concentrations (1.6%).
- Poly(ethylene glycol) diacrylate improved printability and stability but reduced cell survival.
Conclusions:
- GelMA concentration and scaffold stiffness are critical factors modulating hSCPC differentiation into specific neuronal subtypes.
- DLP bioprinting of GelMA-based scaffolds provides a viable platform for delivering hSCPCs for SCI regeneration.
- Material optimization is key for enhancing both printability and therapeutic efficacy in SCI treatment.
