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Related Experiment Video

Updated: Jun 14, 2025

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Triple-Cue-Guided Multichannel Hydrogel Conduit to Synergistically Enhance Peripheral Nerve Repair.

Yuting Cai1,2, Penghui Wang3, Yaxuan Li1

  • 1Department of Chemical and Biological Engineering, and William Mong Institute of Nano Science and Technology, and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Kowloon, Hong Kong 999077, China.

ACS Nano
|June 13, 2025
PubMed
Summary

This study introduces a novel multichannel nerve guidance conduit (NGC) that integrates topographical, conductivity, and nerve growth factor (NGF) gradients. The developed NGC significantly enhances peripheral nerve regeneration, showing results comparable to autografts.

Keywords:
all in one designconductive hydrogelguidance cuesnerve guidance conduitperipheral nerve regeneration

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Area of Science:

  • Biomaterials Science
  • Neuroscience
  • Regenerative Medicine

Background:

  • Multichannel nerve guidance conduits (NGCs) are effective for repairing large nerve defects.
  • Integrating multiple guidance cues can improve nerve regeneration outcomes.

Purpose of the Study:

  • To develop a novel multichannel NGC incorporating topographical guidance, a conductivity gradient, and a nerve growth factor (NGF) gradient.
  • To evaluate the efficacy of this NGC in promoting peripheral nerve regeneration both in vitro and in vivo.

Main Methods:

  • Fabrication of an aligned hydrogel conduit using directional lyophilization of graphene oxide (GO)/poly(vinyl alcohol) (PVA).
  • Creation of a conductivity gradient via dopamine-induced reduction of GO, simultaneously generating amino groups for an NGF gradient.
  • In vitro testing on PC12 neuronal cells and in vivo evaluation in animal models.

Main Results:

  • The NGF-gradient/aligned PVA/reduced graphene oxide (rGO)/polydopamine (PDA)/heparin hydrogel conduit (NGF-AGHC) demonstrated excellent guidance and neuritogenesis in vitro.
  • In vivo studies showed enhanced longitudinal axon attraction, promoted remyelination, and improved functional recovery.
  • Histological and morphological analyses confirmed significant peripheral nerve regeneration, comparable to autografts.

Conclusions:

  • The developed NGC, prepared through a straightforward method, effectively integrates topographical guidance, conductivity gradients, and NGF gradients.
  • This novel NGC presents a promising therapeutic strategy for peripheral nerve repair.