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Related Experiment Video

Updated: Apr 24, 2026

Mouse Sciatic Nerve Transection/Resuture Procedure for Studying Nerve Repair and Functional Recovery
05:08

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Published on: January 16, 2026

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Repair of sciatic nerve defects using tissue engineered nerves.

Caishun Zhang1, Gang Lv1

  • 1Department of Hand and Foot Surgery, First Affiliated Hospital of Liaoning Medical University, Jinzhou 121001, Liaoning Province, China.

Neural Regeneration Research
|September 11, 2014
PubMed
Summary
This summary is machine-generated.

Tissue-engineered nerves using acellular nerve allografts and bone marrow mesenchymal stem cells successfully repaired sciatic nerve defects in rats. This approach promoted functional recovery, outperforming acellular grafts alone.

Keywords:
artificial nervebone marrow mesenchymal stem cellsgrants-supported papernerve scaffoldneural regenerationneuroregenerationperipheral nerve injurysciatic nerve defectstissue engineering

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Area of Science:

  • Regenerative Medicine
  • Neuroscience
  • Biomaterials Science

Background:

  • Peripheral nerve injuries, such as sciatic nerve defects, pose significant challenges for functional recovery.
  • Autologous nerve grafting is a gold standard but limited by donor site morbidity and availability.
  • Tissue engineering offers a promising alternative for nerve repair, utilizing biomaterials and cellular components.

Purpose of the Study:

  • To evaluate the efficacy of tissue-engineered nerves, combining acellular nerve allografts with bone marrow mesenchymal stem cells, for repairing critical-sized sciatic nerve defects.
  • To compare the functional and histological outcomes of this tissue-engineered construct against acellular nerve allografts and autologous nerve grafts.

Main Methods:

  • Acellular nerve allografts were prepared using chemical-enzymatic digestion and mechanical processing.
  • Bone marrow mesenchymal stem cells (MSCs) from Wistar rats were cultured in vitro.
  • The tissue-engineered nerve construct was used to bridge a 15 mm sciatic nerve defect in Wistar rats, with comparisons to acellular grafts and autografts.

Main Results:

  • Electrophysiological studies at 12 weeks showed conduction velocity in tissue-engineered nerve repairs was comparable to autografts and superior to acellular grafts alone.
  • Immunohistochemistry confirmed organized motor endplate reinnervation with acetylcholinesterase-positive nerve fibers.
  • Muscle wet weight ratios and motor function assessments indicated significant functional recovery with the combined approach.

Conclusions:

  • Acellular nerve allografts combined with bone marrow mesenchymal stem cell bridging effectively promote functional recovery in sciatic nerve defects.
  • This tissue-engineered nerve strategy demonstrates superior outcomes compared to acellular nerve allografts alone.
  • The findings support the potential of this regenerative approach for clinical applications in peripheral nerve repair.