# Active Peptides Derived from Snail Mucus Promoted Wound Healing by Enhancing Endothelial Cell Proliferation and Angiogenesis

## TL;DR

Snail mucus contains active peptides that help wounds heal faster by boosting blood vessel growth and cell activity.

## Contribution

Identification of a specific 12-amino-acid peptide from snail mucus that promotes wound healing through angiogenesis.

## Key findings

- EK-12 promotes endothelial cell proliferation, migration, and tube formation in vitro.
- EK-12 accelerates wound healing in mouse models by upregulating CD31 and vascular endothelial growth factors.
- SMAPs show potential as therapeutic agents for wound healing.

## Abstract

Snail mucus has shown promise in promoting wound healing; however, its active components and their mechanisms of action are poorly understood. In the present study snail mucus was isolated and hydrolyzed using trypsin to obtain snail mucus active peptides (SMAPs). SMAPs were analyzed using liquid chromatography–mass spectrometry, and bioinformatics screening. Among the screened peptides, an active 12-amino-acid peptide, EK-12 (molecular weight: 1366.2 Da), was identified and synthesized using a solid-phase peptide synthesis approach. In vitro functional verification showed that EK-12 significantly promoted endothelial cell proliferation, migration, and tube formation. An in vivo experiment demonstrated that EK-12 significantly accelerated wound healing in mouse models. Pathological examination revealed a significantly upregulated expression of CD31 and vascular endothelial growth factors in wound tissues, suggesting that this is the mechanism by which the active peptide promotes angiogenesis and wound healing. Thus, snail mucus-derived peptides hold strong potential for development as therapeutic agents for wound healing.