Suspended graphene oxide nanoparticle for accelerated multilayer osteoblast attachment

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Mimicking layered bone tissue structures remains a challenge due to limitations in assembling osteoblast cells.
• Graphene and graphene oxide (GO) offer unique properties for biomedical applications.

Purpose of the Study:

• To develop a simple technique for assembling osteoblast-like structures using suspended GO.
• To evaluate the toxicity and effects of GO on human mesenchymal stem cells (hMSCs) and saos-2 cells.
• To assess GO's impact on osteoblast differentiation, gene expression, and cell morphology.

Main Methods:

• Suspended GO was synthesized from graphite powder, H2SO4, and KMnO4.
• Toxicity of GO was assessed on hMSCs and saos-2 cells.
• Scanning electron microscopy and real-time PCR were used to evaluate cell attachment, gene expression, and morphology.

Main Results:

• GO toxicity was found to be dose-dependent.
• Suspended GO in osteogenic medium increased the expression of osteoblast genes (osteopontin, osteocalcin) and cell adhesion markers (connexin).
• GO induced multilayer osteoblast cell morphology and increased cell layer numbers.

Conclusions:

• The proposed method using suspended GO is a promising approach for bone tissue engineering.
• GO can facilitate the construction of osteoblast-like structures with enhanced cellular organization.
• This technique holds potential for advancing bone regeneration strategies.