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Related Experiment Video

Updated: Jun 19, 2025

Fabrication of the Composite Regenerative Peripheral Nerve Interface C-RPNI in the Adult Rat
10:35

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Engineered Regenerative Isolated Peripheral Nerve Interface for Targeted Reinnervation.

Jinju Kwon1,2, Seongsu Eom3, Jeong Sik Kong3,4

  • 1Department of Health Science, Graduate School, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|July 25, 2024
PubMed
Summary

Tissue-engineered muscle constructs offer a solution for nerve injury repair, avoiding donor-site morbidity. The novel engineered regenerative isolated peripheral nerve interface (eRIPEN) demonstrated successful nerve regeneration and muscle function in vivo.

Keywords:
3D bioprintingdecellularized extracellular matrixnanofiber membraneregenerative peripheral nerve interfacereinnervationtissue engineering

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Neuroscience

Background:

  • Regenerative peripheral nerve interfaces (RPNI) aim to restore nerve function by reconnecting nerves to target muscles.
  • Current RPNI methods using autologous muscle grafts lead to donor-site complications.
  • There is a critical need for advanced tissue-engineered muscle constructs to overcome these limitations.

Purpose of the Study:

  • To develop and evaluate an engineered regenerative isolated peripheral nerve interface (eRIPEN) using 3D cell printing and electrospinning.
  • To assess the efficacy of eRIPEN in promoting nerve regeneration and functional recovery in vivo.
  • To establish a viable alternative to autologous muscle grafts for RPNI.

Main Methods:

  • Fabrication of eRIPEN using 3D skeletal cell printing and direct electrospinning to create a nanofiber membrane.
  • In vivo implantation of eRIPEN for RPNI surgery in an animal model.
  • Histological analysis to evaluate myofiber distribution, diameter, and cross-sectional area.
  • Assessment of neuromuscular junction formation, muscle contraction force, and functional recovery via tibial functional index.

Main Results:

  • The eRIPEN construct supported the largest distribution of myofibers with a minimum Feret diameter of 15-20 µm and cross-sectional area of 100-500 µm² after 8 months.
  • Successful formation of neuromuscular junctions and measurable muscle contraction force (≈28 N) were observed.
  • Significant improvements were noted, including decreased hypersensitivity to stimuli and an enhanced tibial functional index from -77 to -56.

Conclusions:

  • The engineered regenerative isolated peripheral nerve interface (eRIPEN) represents a novel, tissue-engineered solution for RPNI.
  • eRIPEN effectively promotes nerve regeneration, neuromuscular integration, and functional recovery.
  • This technology holds significant promise for advancing neuroprosthetics and treating peripheral nerve injuries.