# The Effect of Electrical Stimulation on the Cellular Response of Human Mesenchymal Stem Cells Grown on Silicon Carbide-Coated Carbon Nanowall Scaffolds

## TL;DR

This study explores how silicon carbide-coated carbon nanowalls affect human stem cells, especially when electrical stimulation is applied, promoting cell growth and differentiation.

## Contribution

The novel contribution is demonstrating that silicon carbide coatings and electrical stimulation can synergistically enhance stem cell behavior on nanowall scaffolds.

## Key findings

- SiC coating increased cell adhesion area and combined with ES promoted cell proliferation.
- Electrical stimulation enhanced osteogenic differentiation on CNWs regardless of SiC coating.
- SiC coating promoted neural differentiation in combination with increased wall thickness.

## Abstract

Silicon carbide (SiC)-coated carbon nanowalls (CNWs) have been proposed for use as implantable scaffold electrodes. Therefore, we investigated the effects of the SiC coating on CNWs and assessed the effects of the application of electrical stimulation (ES) on human mesenchymal stem cells cultured on SiC-coated CNWs. Measurements were conducted using immunofluorescence staining, proliferation assays, and quantitative reverse transcription polymerase chain reaction. Our results showed that the SiC coating increased the cell adhesion area, and the combination of the SiC coating and ES promoted cell proliferation. Furthermore, ES enhanced osteogenic differentiation on CNWs, both with and without the SiC coating. In SiC-coated samples, the increase in wall thickness of CNWs by the SiC coating promoted neural differentiation. These findings indicate that scaffold electrodes composed of SiC-coated CNWs enhance cell adhesion and proliferation; the application of ES to such electrodes promotes osteogenic differentiation, while the SiC coating itself promotes neural differentiation.