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Cryogenic 3D Printing of GelMA/Graphene Bioinks: Improved Mechanical Strength and Structural Properties for Tissue Engineering

  • 0LIMAV-Interdisciplinary Laboratory for Advanced Materials, UFPI - Federal University of Piaui, Teresina, PI, 64049-550, Brazil.
International Journal of Nanomedicine +

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October 29, 2024

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October 29, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

This study enhanced gelatin methacrylate (GelMA) scaffolds with graphene for tissue engineering. The resulting bioinks showed improved mechanical strength, biocompatibility, and vascularization, offering promising applications in regenerative medicine.

Area Of Science

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background

  • Tissue engineering seeks to replicate cellular environments for tissue regeneration.
  • Gelatin methacrylate (GelMA) is a versatile biomaterial known for biocompatibility and tunable properties.
  • Enhancing GelMA scaffolds is crucial for advanced tissue engineering applications.

Purpose Of The Study

  • To develop a GelMA and graphene bioink platform to improve scaffold properties.
  • To investigate the effects of graphene incorporation on GelMA scaffold mechanical and biological characteristics.
  • To assess the suitability of the developed bioink for tissue engineering applications.

Main Methods

  • GelMA bioinks were formulated with graphene at varying concentrations (1, 1.5, 2 mg/mL).
  • Scaffold properties were evaluated using compressive strength, thermal stability (DSC), cytotoxicity assays, and the chorioallantoic membrane (CAM) assay.
  • Cryoprinting at -30°C was utilized to maintain scaffold structure and function.

Main Results

  • Graphene integration significantly enhanced the compressive strength and thermal stability of GelMA scaffolds.
  • Cytotoxicity assays demonstrated high cell survival rates (>90%), confirming excellent biocompatibility.
  • The CAM assay revealed significant vascularization, indicating potent angiogenic potential and successful biocompatibility.

Conclusions

  • Integrating graphene into GelMA hydrogels, combined with low-temperature 3D printing, is an effective strategy for advanced scaffold fabrication.
  • The developed GelMA/graphene scaffolds exhibit superior mechanical properties, biocompatibility, and pro-vascularization capabilities.
  • These enhanced scaffolds are highly suitable for diverse tissue engineering and regenerative medicine applications.

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