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CNT-Type Dependent Cellular Adhesion on 3D-Printed Nanocomposite for Tissue Engineering.

Adam A Mieloch1, Julia A Semba1,2, Jakub D Rybka1

  • 1Center for Advanced Technology, Adam Mickiewicz University, Poznan, Poland.

International Journal of Bioprinting
|June 7, 2022
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Summary

This study enhanced polycaprolactone (PCL) for 3D bioprinting using carbon nanotubes (CNT). Bamboo-like CNT at 0.02% significantly improved cell adhesion and proliferation, crucial for tissue engineering applications.

Keywords:
3D bioprintingCarbon nanotubesPolycaprolactoneTissue engineering nanocomposite

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Nanotechnology

Background:

  • 3D bioprinting for tissue engineering requires advanced biomaterials.
  • Hydrogels lack mechanical strength for load-bearing tissues.
  • Polycaprolactone (PCL) needs enhancement for better cellular interaction.

Purpose of the Study:

  • To investigate carbon nanotube (CNT) reinforced PCL for 3D bioprinting.
  • To evaluate the impact of multiwalled carbon nanotubes (MWCNT) and bamboo-like carbon nanotubes (BCNT) on PCL properties.
  • To assess the biological response of chondrocytes to CNT-PCL composites.

Main Methods:

  • Fabrication of PCL composites with varying concentrations of MWCNT and BCNT.
  • Characterization using scanning electron microscopy, nanoindentation, rheometry, and differential scanning calorimetry.
  • Biological evaluation with human articular chondrocytes via confocal microscopy and proliferation assays.

Main Results:

  • CNT addition improved rheological properties and slightly enhanced mechanical strength.
  • Pure PCL showed poor cell adhesion and high apoptosis.
  • 0.02% BCNT-reinforced PCL significantly improved chondrocyte adhesion and proliferation compared to MWCNT and pure PCL.

Conclusions:

  • CNT reinforcement can enhance PCL's suitability for 3D bioprinting.
  • BCNT shows particular promise for improving biological performance in tissue engineering scaffolds.
  • Optimized CNT-PCL composites offer potential for creating functional non-soft tissue constructs.