Physiologically Self-Regulated, Fully Implantable, Battery-Free System for Peripheral Nerve Restoration

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Neuroscience

Background:

• Long-segment peripheral nerve injuries (PNIs) present significant challenges in achieving complete nerve regeneration and functional recovery.
• Current electrical stimulation (ES) devices lack the adaptive capabilities required for optimal nerve repair, failing to synchronize with physiological states.

Purpose of the Study:

• To develop a fully implantable neural electrical stimulation (FI-NES) system capable of physiologically adaptive and self-regulated electrical signaling.
• To provide an effective method for accelerating peripheral nerve injury recovery in vivo.

Main Methods:

• Integration of a novel tribo/piezoelectric hybrid nanogenerator with a nanoporous nerve guide conduit to create the FI-NES system.
• Generation of physiologically self-regulated electrical signals derived from the body's own physiological states.
• Assessment of PNI recovery through morphological evaluation, protein expression analysis, and functional reconstruction of regenerated nerves.

Main Results:

• The FI-NES system demonstrated a significant acceleration of PNI recovery in 15 mm nerve defects.
• Nerve regeneration and functional outcomes achieved with the FI-NES system were comparable to autograft results.
• The system's self-regulated electrical parameters were highly responsive to varying physiological conditions.

Conclusions:

• The developed FI-NES system offers a promising, implantable solution for enhancing long-segment peripheral nerve injury repair.
• This technology has potential applications beyond PNI, including other tissue injuries and neurodegenerative diseases.
• The physiologically adaptive nature of the FI-NES system represents a significant advancement over existing ES technologies.