# Developments and Assessments of Crude Tea Saponin-Incorporated Silica Nanoparticles for Their Bioactivity Improvement

## TL;DR

This paper explores how incorporating tea saponins into silica nanoparticles improves their bioactivity and reduces toxicity for biomedical use.

## Contribution

The novel approach of incorporating crude tea saponins into silica nanoparticles enhances their therapeutic potential.

## Key findings

- TSNPs have an average diameter of 200–300 nm and reduced cytotoxicity in HaCaT cells.
- TSNPs significantly lower ROS production and accelerate cell migration in wound closure models.
- FTIR analysis shows Si-O- and -OH bonds control the release behavior of TSNPs.

## Abstract

The use of saponins with biosurfactant, antioxidant, anti-inflammatory, and anti-cancer properties is limited by their toxicity and bioavailability. This study focused on the fabrication, characterization, and bioactivity of crude tea saponin (TS) and TS-incorporated silica nanoparticles (TSNPs). Our results showed that TS contained seven saponins and that TSNPs had an average diameter of 200–300 nm, a negative surface charge, and high polydispersity. Fourier Transform Infrared Spectroscopy (FTIR) revealed an incorporation bond of Si-O- and -OH controlling releasing behavior with t50 = 24 h. Using HaCaT cells, it was demonstrated that TSNPs reduced cytotoxicity. Reactive oxygen species (ROS) production was lowered in both TS and TSNP treatments, with significantly greater efficacy at higher concentrations. Additionally, TSNPs significantly accelerated cell migration in the wound closure model as efficiently as TGFβ. Together, these findings offer promising TSNPs for biomedical applications and therapeutic agents due to their antioxidant properties, cytotoxicity protection, and wound closure acceleration.