High-Throughput Screening of Rat Mesenchymal Stem Cell Behavior on Gradient TiO₂ Nanotubes

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cell Biology

Background:

• Titanium dioxide nanotubes (TNTs) exhibit variable dimensions, complicating their use in biomedical applications.
• Optimizing TNT size is crucial for controlling cellular responses.

Purpose of the Study:

• To fabricate gradient TNTs for high-throughput screening of nanotube size effects on cell responses.
• To investigate the influence of TNT diameter on cell adhesion, proliferation, and differentiation.

Main Methods:

• Fabrication of gradient TNTs using a one-step bipolar anodization method (30-100 nm diameter range).
• High-throughput screening of cell adhesion, proliferation, and differentiation on gradient TNTs.
• Analysis of protein adsorption and focal adhesion formation.

Main Results:

• No significant difference in cell adhesion for TNTs between 30-87 nm.
• TNTs with diameters >87 nm significantly reduced cell adhesion, independent of serum proteins.
• Cell proliferation and differentiation decreased with increasing TNT size, linked to protein adsorption and focal adhesion.

Conclusions:

• Gradient TNTs are effective for high-throughput screening of nanotube size effects.
• TNT diameter critically influences cell adhesion, proliferation, and differentiation.
• Findings provide insights into optimizing TNTs for biomedical applications.