Electrical Microenvironment Reconstruction and the Application of Biomaterials in Spinal Cord Injury

Area of Science:

• Neuroscience
• Biomaterials Science
• Regenerative Medicine

Background:

• Spinal cord injury (SCI) leads to a loss of electrical signaling in the central nervous system, initiating a cascade of neuronal degeneration and glial scarring that impedes natural repair.
• Conventional therapies are often ineffective in reversing this 'electrical silence-neuronal degeneration-glial proliferation' cycle, highlighting the need for novel therapeutic approaches.

Purpose of the Study:

• To systematically review the pathological mechanisms underlying electrical microenvironment imbalance after SCI.
• To outline current and emerging biomaterial-based intervention strategies for SCI that leverage electrical modulation.
• To propose a theoretical framework for developing precise, biocompatible electrically modulating biomaterials for functional neural circuit reconstruction.

Main Methods:

• Systematic review of literature on SCI pathophysiology, focusing on the bioelectrical microenvironment.
• Analysis of current biomaterial strategies, including conductive materials and exogenous electrical stimulation techniques.
• Integration of neuroscience and biomaterials perspectives to conceptualize advanced therapeutic designs.

Main Results:

• Electrical microenvironment collapse is a critical factor in SCI, driving neuronal death and inhibiting regeneration.
• Biomaterial interventions are evolving from passive electrical pathway reconstruction to active electrical field regulation.
• Exogenous electrical stimulation, via biomaterials, can activate signaling pathways (e.g., voltage-gated calcium channels) to promote axonal growth, stem cell differentiation, and immune modulation.

Conclusions:

• Restoring the bioelectrical microenvironment is crucial for SCI treatment.
• Electrically modulating biomaterials offer a promising avenue for advancing SCI therapies.
• Future research should focus on developing precise and biocompatible materials for functional neural circuit reconstruction post-SCI.