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Updated: Jul 12, 2025
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Tissue Engineering: Construction of a Multicellular 3D Scaffold for the Delivery of Layered Cell Sheets
Published on: October 3, 2014
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A 3D-Printed Dual Driving Forces Scaffold with Self-Promoted Cell Absorption for Spinal Cord Injury Repair
Chen Qiu1,2, Yuan Sun3,4, Jinying Li1,2
1Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, 310058, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|October 23, 2023
Summary
A new hyper expansion scaffold (HES) efficiently delivers high densities of human amniotic epithelial stem cells (hAESCs) for nerve repair. This platform enhances cell loading and promotes functional recovery in spinal cord injury models.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Neuroscience
Background:
- Stem cells are crucial for nerve repair therapies and tissue engineering.
- Effective delivery of high stem cell densities remains a significant challenge.
Purpose of the Study:
- To develop a novel cell delivery platform, the hyper expansion scaffold (HES), for high cell loading.
- To investigate the self-promoted cell absorption mechanism of HES.
- To evaluate the efficacy of HES-loaded stem cells in a spinal cord injury model.
Main Methods:
- Development of the hyper expansion scaffold (HES) with a dual driving force model.
- In vitro assessment of cell absorption capacity and expansion.
- In vivo evaluation of HES-human amniotic epithelial stem cells (hAESCs) in spinal cord injury rat models.
Main Results:
- HES demonstrated an 80-fold size expansion, absorbing 2.6 million hAESCs in 2 minutes, a >400% increase in loading capacity.
- Macroscopic swelling forces and microscale capillary action contributed to enhanced cell uptake.
- HES-hAESCs promoted functional recovery and axonal projection in SCI rats by reducing neuroinflammation and improving the neurotrophic microenvironment.
Conclusions:
- The dual driving forces model offers a new strategy for engineering hydrogel scaffolds for self-promoted cell absorption.
- The HES platform is a potent and efficient vehicle for delivering high densities of hAESCs.
- HES shows significant potential for clinical applications in spinal cord injury treatment and nerve repair.
