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Magnetic-Responsive Carbon Nanotubes Composite Scaffolds for Chondrogenic Tissue Engineering
Muthusamy Saranya1, Aldeliane M da Silva1, Hanna Karjalainen2
1Microelectronic Research Unit, University of Oulu, Oulu, 90570, Finland.
Advanced Healthcare Materials
|September 3, 2023
Summary
Engineered scaffolds with magnetic-responsive carboxylated multi-walled carbon nanotubes (cMWCNTs) show promise for tissue engineering. While they enhance chondrocyte activity, magnetic fields did not elicit specific cell responses in this study.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Nanotechnology
Background:
- Growing demand for engineered scaffolds delivering multiple cell cues.
- Stimuli-responsive scaffolds are crucial for sensing external triggers and modulating biofunctions.
- Understanding the interplay between cell fate and microenvironmental cues is key.
Purpose of the Study:
- To integrate magnetic-responsive carboxylated multi-walled carbon nanotubes (cMWCNTs) into 3D collagen/polylactic acid (PLA) scaffolds.
- To assess the safety and biomechanical integrity of these composite scaffolds.
- To evaluate the effect of magnetic fields on chondrocytes within these scaffolds.
Main Methods:
- Reproducible filtration-based method for cMWCNT integration into collagen/PLA scaffolds.
- In vitro safety assessment including cytotoxicity and macrophage inflammatory response.
- In vitro studies on chondrocyte metabolic activity, viability, and extracellular matrix production.
- Application of static and pulsed magnetic fields to seeded scaffolds.
Main Results:
- Collagen/PLA scaffold integrity and biomechanical performance were preserved after cMWCNT integration.
- cMWCNT/collagen/PLA scaffolds demonstrated no cytotoxicity or pro-inflammatory response.
- Scaffolds enhanced chondrocyte metabolic activity, viability, and extracellular matrix production (type II collagen, aggrecan).
- No specific cell response was observed in dependence on static or pulsed magnetic fields, regardless of cMWCNT presence.
Conclusions:
- CNTs can be integrated into collagen/PLA scaffolds without compromising integrity or safety.
- These composite scaffolds support chondrocyte function and extracellular matrix production.
- Magnetic fields, in this configuration, did not induce specific cellular responses, suggesting further optimization is needed for magnetic responsiveness.
