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3D Printed Porous Cellulose Nanocomposite Hydrogel Scaffolds
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Hydrogel-laden paper scaffold system for origami-based tissue engineering.

Su-Hwan Kim1, Hak Rae Lee2, Seung Jung Yu2

  • 1Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 151-742, Republic of Korea;

Proceedings of the National Academy of Sciences of the United States of America
|December 2, 2015
PubMed
Summary

Researchers developed a novel origami-based scaffold using biofunctionalized paper and alginate hydrogel for tissue regeneration. This system successfully regenerated rabbit tracheas, demonstrating its potential for creating complex, native-like tissue constructs.

Keywords:
hydrogelinitiated chemical vapor depositionorigamipaper scaffoldstissue engineering

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Area of Science:

  • Biomaterials Engineering
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Tissue regeneration requires advanced scaffold systems that mimic native tissue architecture.
  • Existing methods often face challenges in achieving structural complexity and controlled cell integration.

Purpose of the Study:

  • To develop a versatile, origami-based scaffold system for tissue regeneration.
  • To create a biofunctionalized paper-alginate hydrogel construct with enhanced cell adhesion and structural integrity.

Main Methods:

  • Conformal modification of paper surfaces with poly(styrene-co-maleic anhydride), poly-l-lysine (PLL), and Ca(2+) for alginate hydrogel formation.
  • Utilizing electrostatic interactions between alginate and PLL for strong hydrogel adhesion.
  • Employing an origami-based approach for free-folding into 3D structures and area-selective cell seeding.

Main Results:

  • The developed scaffold system demonstrated versatile 3D structure formation and area-selective cell seeding.
  • A cylindrical scaffold seeded with chondrocytes successfully regenerated a rabbit tracheal defect within 4 weeks, without stenosis.
  • The biofunctionalized paper-alginate hydrogel system showed robust adhesion and structural integrity.

Conclusions:

  • The origami-based, biofunctionalized paper scaffold offers a robust and facile method for engineering complex tissue constructs.
  • This approach shows significant promise for reliable tissue regeneration, particularly in complex anatomical structures like the trachea.