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Cell-assembled graphene biocomposite for enhanced chondrogenic differentiation
Wong Cheng Lee1, Candy Haley Lim, Kenry
1Department of Biomedical Engineering and Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore; NUS Graduate School of Integrative Sciences and Engineering, National University of Singapore, Singapore, 117456, Singapore.
Graphene-based biomaterials can enhance cartilage tissue engineering by pre-concentrating growth factors. Graphene and porous graphene oxide show promise for chondrogenic differentiation, but optimal concentrations are crucial to avoid negative effects.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Nanotechnology
Background:
- Graphene nanomaterials offer unique properties for biomedical applications.
- The 2D structure of graphene limits its use beyond planar cultures.
- Developing novel platforms for controlled cell differentiation is essential.
Purpose of the Study:
- To investigate graphene-cell biocomposites as platforms for growth factor pre-concentration.
- To evaluate the effect of graphene and porous graphene oxide on chondrogenic differentiation of mesenchymal stem cells (MSCs).
- To explore applications in tissue-engineered cartilage and suspension cultures.
Main Methods:
- Formation of graphene-cell biocomposites using MSCs and graphene/porous graphene oxide flakes.
- Assessment of chondrogenic differentiation at varying concentrations of graphene (G) and porous graphene oxide (pGO).
- Analysis of differentiation extent, diffusional barriers, and cytotoxic effects.
Main Results:
- Increasing G and pGO concentrations positively correlated with chondrogenic differentiation.
- High concentrations of graphene oxide led to decreased chondrogenesis due to increased diffusional barriers and cytotoxicity.
- Graphene-cell biocomposites effectively pre-concentrated growth factors.
Conclusions:
- Graphene and porous graphene oxide serve as effective pre-concentration platforms for chondrogenic differentiation.
- Optimized concentrations of graphene-based materials are key for successful tissue engineering.
- These findings support the use of graphene-cell biocomposites for cartilage tissue engineering and in vitro suspension cultures.
