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Annular Conductive Hydrogel-Mediated Wireless Electrical Stimulation for Augmenting Neurogenesis
Jing Hong1,2, Zhanchi Zhu1,2, Zhaojun Wang1,2
1School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Anhui, 230026, China.
Advanced Healthcare Materials
|May 23, 2024
Summary
This study introduces a flexible, wireless hydrogel electrode for electrical stimulation (ES) to promote nerve regeneration. The novel device successfully enhanced neural stem cell growth and improved neurological function in stroke models, offering a promising treatment for neurodegenerative diseases.
Area of Science:
- Biomaterials Science
- Neuroscience
- Regenerative Medicine
Background:
- Electrical stimulation (ES) shows promise for neurological disease treatment by regulating neuronal differentiation and neurogenesis.
- Conventional wired electrodes face limitations due to mechanical mismatch with soft tissues, restricted motion, and infection risks, hindering clinical application.
- Wireless techniques combined with soft hydrogels offer a potential solution for advanced nerve regeneration therapies.
Purpose of the Study:
- To develop a flexible, implantable, wireless electrical stimulation (ES)-responsive electrode.
- To evaluate the efficacy of this novel hydrogel electrode in promoting neural stem cell growth and neuronal differentiation in vitro.
- To assess the therapeutic potential of the wireless ES system in an in vivo model of ischemic stroke.
Main Methods:
- Fabrication of a flexible, implantable wireless ES-responsive electrode using an annular gelatin methacrylate-polyaniline (Gel/Pani) hydrogel.
- Utilizing the hydrogel electrode as a secondary coil for wireless ES via electromagnetic induction.
- Culturing neural stem cells on the hydrogel electrode and applying wireless ES in vitro.
- Implanting the hydrogel electrode in vivo in rats with ischemic stroke to evaluate its therapeutic effects.
Main Results:
- The fabricated Gel/Pani hydrogels demonstrated excellent biocompatibility, biodegradability, conductivity, and compression resistance.
- The annular electrode of the Gel/Pani conductive hydrogel (AECH) supported neural stem cell growth in vitro.
- Wireless ES facilitated neuronal differentiation and the formation of functional neural networks in vitro.
- In vivo implantation in stroke models showed that AECH-mediated wireless ES significantly ameliorated brain impairment and neurological function by activating endogenous neurogenesis.
Conclusions:
- A novel flexible hydrogel system for wireless electrical stimulation has been successfully developed.
- This system overcomes technical challenges associated with wireless stimulation and implantable devices.
- The AECH holds significant potential for the treatment of neurodegenerative diseases and nerve regeneration.
