# Enhancement of Oral Mucosal Regeneration Using Human Exosomal Therapy in SD Rats

## TL;DR

This study shows that human exosomes can significantly speed up the healing of oral wounds in rats, suggesting potential for clinical use.

## Contribution

The novel use of human exosomes to enhance oral mucosal regeneration in SD rats is demonstrated.

## Key findings

- Exosome-treated wounds showed an 87.3% reduction in size by day 10 compared to 64.1% in controls.
- Treated tissues exhibited better epithelial development and collagen organization.
- Healing metrics were consistently superior in the exosome group across all timepoints.

## Abstract

Background/Objectives: Oral cavity wound recovery presents unique challenges due to constant moisture exposure and functional mechanical stresses. Nanoscale extracellular vesicles (exosomes) with regenerative properties offer promising therapeutic potential for tissue regeneration, contributing to improved health outcomes. This study evaluated human exosomal preparations in promoting oral mucosal regeneration. Methods: We established standardized full-thickness wounds in the buccal mucosa of SD rats and divided subjects into experimental (receiving 50 billion human exosomes) and control (receiving carrier solution only) groups. Comprehensive wound assessment occurred at predetermined intervals (days 0, 3, 7, and 10) through photographic documentation, histological examination, and quantitative measurement. Results: Exosomal-treated tissues demonstrated statistically significant acceleration in closure rates (p < 0.05), achieving 87.3% reduction by day 10 versus 64.1% in the controls. Microscopic analysis revealed superior epithelial development, reduced inflammatory infiltration, and enhanced collagen architectural organization in exosomal-treated specimens. Semi-quantitative evaluation confirmed consistently superior healing metrics in the experimental group across all assessment timepoints. Conclusions: These findings demonstrate that human exosome preparations significantly enhance oral mucosal regeneration in SD rats, suggesting potential clinical applications for accelerating recovery following oral surgical procedures.