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Conductive ionic liquid hydrogel filled anti-inflammatory nerve conduit repairs peripheral nerve defect.

Jiahui Song1, Chenlong Liao2, Runze Jin3

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Biological Science and Medical Engineering, Donghua University, Shanghai, 201620, China.

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Summary

This study developed a novel conductive and anti-inflammatory scaffold for peripheral nerve repair. The innovative conduit significantly promoted nerve regeneration and functional recovery in a rat sciatic nerve injury model.

Keywords:
Anti-inflammatory drugElectrospinningHydrogel-filled conduitIonic liquid hydrogelPeripheral nerve regeneration

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Neuroscience

Background:

  • Peripheral nerve injuries (PNIs) pose significant challenges to nerve regeneration and functional recovery.
  • Effective repair strategies require microenvironments that support cell growth and reduce inflammation.
  • Existing treatments often have limitations in promoting complete nerve regeneration.

Purpose of the Study:

  • To develop and evaluate a novel conductive and anti-inflammatory scaffold for peripheral nerve repair.
  • To investigate the efficacy of a chitosan-hydroxyethyl cellulose/ionic liquid hydrogel within a poly(L-lactide-co-caprolactone)/luteolin nanofiber conduit.
  • To assess the scaffold's impact on cell proliferation, macrophage polarization, and nerve regeneration in a rat model.

Main Methods:

  • Construction of a conductive CS-HEC/IL hydrogel.
  • Integration of the hydrogel into a hollow PLCL/Lut nanofiber conduit.
  • In vitro assessment of Schwann and PC12 cell proliferation and macrophage M2 phenotype transition.
  • In vivo implantation into a 10 mm rat sciatic nerve defect model.
  • Histological and functional assessments 8 weeks post-surgery.

Main Results:

  • The PLCL/Lut-CS-HEC/IL conduit significantly enhanced Schwann and PC12 cell proliferation.
  • The scaffold promoted macrophage transition to the anti-inflammatory M2 phenotype.
  • Histological analysis showed enhanced myelination and axonal outgrowth.
  • Functional assessments revealed improved motor recovery and nerve conduction in the treated group.

Conclusions:

  • The developed PLCL/Lut-CS-HEC/IL scaffold provides a promising conductive and anti-inflammatory microenvironment for peripheral nerve repair.
  • This strategy effectively promotes nerve regeneration and functional recovery.
  • The scaffold holds significant therapeutic potential for treating peripheral nerve injuries.