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Related Experiment Video

Updated: Sep 14, 2025

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3D-Printed Scaffolds Promote Enhanced Spinal Organoid Formation for Use in Spinal Cord Injury.

Guebum Han1, Nicolas S Lavoie2, Nandadevi Patil2

  • 1Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, 55455, USA.

Advanced Healthcare Materials
|July 24, 2025
PubMed
Summary

This study developed 3D-printed organoid scaffolds using spinal neural progenitor cells (sNPCs) to treat spinal cord injury (SCI). The innovative scaffolds significantly improved functional recovery in rats by promoting cell differentiation and neural network formation.

Keywords:
3D‐printed scaffoldfunctional recoveryhuman induced pluripotent stem cellsspinal cord organoidsspinal neural progenitor cells

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Area of Science:

  • Regenerative Medicine
  • Biomaterials Engineering
  • Neuroscience

Background:

  • Spinal cord injury (SCI) poses significant challenges for functional restoration.
  • Transplantation of regionally specific spinal neural progenitor cells (sNPCs) shows promise for SCI repair.
  • Existing methods lack optimal guidance for cell integration and network formation.

Purpose of the Study:

  • To develop and evaluate 3D-printed organoid scaffolds for enhanced sNPC transplantation in SCI.
  • To guide axonal projections and promote neuronal network development in vivo.
  • To assess the functional recovery and cellular integration following scaffold transplantation in a rat SCI model.

Main Methods:

  • Clinically relevant human induced pluripotent stem cell-derived sNPCs were utilized.
  • Microscale channel scaffolds were fabricated using 3D printing technology.
  • sNPCs were printed within scaffolds, and the constructs were transplanted into transected rat spinal cords.

Main Results:

  • The 3D-printed scaffolds successfully directed axonal growth and promoted in vivo-like cell maturation.
  • Transplanted organoid scaffolds significantly enhanced functional recovery in rats post-SCI.
  • Post-transplantation, cells differentiated into neurons, integrated into host tissue, and formed synapses rostrally and caudally.

Conclusions:

  • 3D-printed organoid scaffolds provide a promising platform for sNPC transplantation in SCI.
  • This approach facilitates the creation of a spinal cord relay system and promotes functional restoration.
  • Combining sNPCs, organoid assembly, and 3D printing offers a transformative therapeutic strategy for SCI.