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TYRAY-Functionalized Alginate Bioinks for 3D Bioprinting Support Stem Cell Culture and Endothelial Network Formation.

Vaclav Chochola1, Karolina Spustova1,2, Josef Lavicky1

  • 1Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno 62500, Czech Republic.

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Summary

This study enhances alginate hydrogels for 3D bioprinting using the TYRAY peptide. The modified hydrogels improve cell adhesion, proliferation, and vascular network formation for tissue engineering applications.

Keywords:
3D bioprintingTYRAYalginatebioinkendothelial networkspeptide functionalizationpluripotent stem cellsspheroid fusionvascularization

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Alginate is a common biomaterial in 3D bioprinting due to its biocompatibility and cost-effectiveness.
  • However, alginate's bioinert nature limits cell adhesion, migration, and proliferation, hindering its use in advanced tissue engineering.
  • Enhancing alginate's biological functionality is crucial for developing effective tissue scaffolds.

Purpose of the Study:

  • To develop an enhanced alginate-based bioink for improved cell support and vascular network formation.
  • To investigate the efficacy of TYRAY peptide incorporation for promoting cell adhesion and migration.
  • To establish a versatile, xeno-free alginate system for 3D cell culture and bioprinting.

Main Methods:

  • Incorporation of the TYRAY peptide into 3D alginate hydrogels.
  • Modification of hydrogel surfaces with Ca(OH)2 for stable anchoring.
  • Utilization of ultrasonic mist cross-linking for structural fidelity.
  • Culturing of stem, stromal, and endothelial cells within the modified hydrogels.

Main Results:

  • TYRAY peptide functionalization significantly enhanced stem cell proliferation and migration.
  • The modified hydrogels promoted multicellular spheroid fusion and stability.
  • Endothelial cells formed functional vascular networks within the 3D bioprinted constructs.
  • The developed alginate system demonstrated improved cell-matrix interactions compared to unmodified alginate.

Conclusions:

  • The TYRAY peptide-functionalized alginate hydrogels represent a significant advancement in bioink technology.
  • This enhanced alginate system supports critical cellular processes essential for tissue regeneration.
  • The developed material is a versatile and promising platform for 3D bioprinting and advanced cell culture applications.