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Related Concept Videos

Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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Related Experiment Video

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Transplantation of Schwann Cells Inside PVDF-TrFE Conduits to Bridge Transected Rat Spinal Cord Stumps to Promote Axon Regeneration Across the Gap
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Shape-Persistent Conductive Nerve Guidance Conduits for Peripheral Nerve Regeneration.

Jiahui Song1, Jize Dong2, Zhengchao Yuan1

  • 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, P. R. China.

Advanced Healthcare Materials
|May 17, 2024
PubMed
Summary

A novel shape-persistent conductive nerve guidance conduit (NGC) was developed to improve peripheral nerve regeneration. This stable, biocompatible NGC shows promise for repairing long-gap and large-diameter nerve injuries.

Keywords:
conductive  NGCselectrospun nanofibersperipheral nerve regenerationshape memory

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Neuroscience

Background:

  • Peripheral nerve injuries often result in slow regeneration and axonal mismatch.
  • Nerve guidance conduits (NGCs) are used to promote nerve repair, but structural instability is a challenge.
  • Multichannel NGCs mimic nerve structure but can lack stability; thermo-responsive shape memory polymers (SMPs) offer structural persistence.

Purpose of the Study:

  • To design and evaluate an electrospun, shape-persistent, conductive NGC for enhanced peripheral nerve regeneration.
  • To assess the physicochemical properties, biocompatibility, and regenerative potential of novel NGCs.
  • To investigate the efficacy of conductive NGCs in promoting nerve repair in vivo.

Main Methods:

  • Fabrication of electrospun NGCs using shape memory polymers and conductive materials (graphene oxide, reduced graphene oxide).
  • In vitro assessment of physicochemical properties and biocompatibility (P, P/G, P/G-GO, P/G-RGO NGCs).
  • In vivo implantation in rat sciatic nerves and subcutaneous tissue, followed by histological and immunofluorescence analysis.

Main Results:

  • The conductive NGC (P/G-RGO) demonstrated a stable structure within the physiological temperature range.
  • In vitro and in vivo studies confirmed good biocompatibility of the NGCs.
  • The conductive NGC significantly promoted peripheral nerve regeneration compared to controls.

Conclusions:

  • Shape-persistent conductive NGCs offer a stable and biocompatible platform for nerve regeneration.
  • The P/G-RGO NGC is a promising candidate for promoting peripheral nerve recovery, particularly in cases of long-gap and large-diameter nerve injuries.
  • This technology holds potential for advancing treatments for severe peripheral nerve damage.