TiO₂ surfaces support neuron growth during electric field stimulation.

Area of Science:

• Biomaterials Science
• Neuroscience
• Biocompatibility

Background:

• Neural prostheses require biocompatible substrates for electrical stimulation.
• Titanium dioxide (TiO2) is explored for its unique electrochemical and surface properties.

Purpose of the Study:

• To evaluate TiO2 as a novel substrate for neural prostheses involving electrical stimulation.
• To investigate the biocompatibility and neuron-supportive capabilities of TiO2.

Main Methods:

• Physicochemical characterization of TiO2 using XRD, XPS, SEM, AFM, and contact angle measurements.
• Culturing amphibian spinal neurons on TiO2 and control glass substrates.
• Assessing neuron adhesion, neurite outgrowth, morphology, and growth under electric field exposure.

Main Results:

• TiO2 surfaces facilitated direct neuron adhesion and neurite extension without pre-coating.
• Neurons on TiO2 exhibited complex filopodial morphology.
• TiO2 supported neuron growth and neurite orientation during electric field stimulation, comparable to glass.

Conclusions:

• TiO2 is a promising biocompatible material for neural prostheses.
• Its properties support intimate neuron-surface interactions and neuron growth under electrical stimulation.
• TiO2 holds potential for neuroprosthetic applications requiring electrical field stimulation.