What question did this study set out to answer?

To develop and assess a conductive scaffold aimed at enhancing spinal cord regeneration through dual inhibition release and topographical guidance.

June 20, 2026Open Access

Conductive Scaffold for Spinal Cord Regeneration Bridge (CSRB): A Four-Component Fiber System with Dual Inhibition Release, Topographic Axon Guidance, and Remyelination for Complete and Incomplete Spinal Cord Injury

Key Points

To develop and assess a conductive scaffold aimed at enhancing spinal cord regeneration through dual inhibition release and topographical guidance.
Constructed a four-component bioconductive fiber system integrating aligned PEDOT:PSS nanofibers and a dual sustained-release mechanism.
Utilized ChABC and NEP1-40 for dissolving inhibitory barriers and blocking myelin-derived inhibition, respectively.
Created spatially segregated neurotrophin gradients for facilitating axonal guidance and remyelination.
The scaffold significantly supports axon contact guidance and electrical stimulation.
Sustained release of ChABC and NEP1-40 successfully reduced CSPG scar formation and myelin-derived inhibition.
The integration of neurotrophins improved axonal growth rates and remyelination in spinal cord models.

Abstract

Approximately 250–500 million people worldwide live with spinal cord injury (SCI). No FDA-approved therapy restores function after chronic complete SCI as of 2026. This paper presents the Conductive Scaffold for Spinal Cord Regeneration Bridge (CSRB): a four-component bioconductive fiber jungle gym that bridges the injury gap, simultaneously dissolves inhibitory barriers, guides motor and sensory axons into topographically correct pathways, and induces remyelination — all from a single implantable scaffold. The design integrates: (1) aligned PEDOT:PSS nanofibers (200–500 nm diameter) for axon contact guidance and electrical stimulation; (2) dual sustained-release system: ChABC (chondroitinase ABC) to dissolve CSPG scar barrier + NEP1-40 (Nogo receptor antagonist peptide) to block myelin-derived inhibition; (3) spatially segregated neurotrophin gradients — BDNF for corticospinal tract (motor),

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