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Multifunctional Biodegradable Conductive Hydrogel Regulating Microenvironment for Stem Cell Therapy Enhances the
Chao Xu1, Ping Wu1,2, Kun Yang1
1National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China.
Small (Weinheim an Der Bergstrasse, Germany)
|December 26, 2023
Summary
This study developed a novel biodegradable conductive hydrogel to repair peripheral nerve injuries. The hydrogel supports stem cell differentiation and promotes nerve regeneration by regulating the microenvironment.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Neuroscience
Background:
- Peripheral nerve injury repair remains a challenge.
- Advanced hydrogels are needed for nerve regeneration scaffolds.
- Stem cells can differentiate into Schwann cells (SCs) to aid myelination.
Purpose of the Study:
- To develop a multifunctional, biodegradable, conductive hydrogel scaffold for peripheral nerve repair.
- To investigate the hydrogel's ability to regulate the regenerative microenvironment.
- To promote SC differentiation, angiogenesis, and axon regrowth.
Main Methods:
- Constructed a hydrogel using methacryloyl gelatin, decellularized extracellular matrix (GelMA/ECM), and polydopamine-modified silicon phosphorus (SiP@PDA) nanosheets.
- Investigated the hydrogel's electrical properties and sustained Si element release.
- Assessed macrophage polarization, angiogenesis, SC-like differentiation of MSCs, and nerve regeneration in vitro and in vivo.
Main Results:
- The GelMA/ECM-SiP@PDA hydrogel created a biomimetic electrical microenvironment that promoted M2 macrophage polarization.
- Sustained silicon release from the hydrogel supported vascularization.
- MSCs cultured in the hydrogel showed increased expression of SC differentiation genes, enhancing myelination and axon regrowth.
Conclusions:
- The developed biodegradable conductive hydrogel is a promising multifunctional scaffold for peripheral nerve repair.
- The hydrogel effectively regulates the regenerative microenvironment, enhancing nerve tissue repair.
- This strategy offers significant potential for treating severe peripheral nerve injuries.
