# Unveiling the intricacies: small interfering RNA targeting Snail-1 unravels dynamics in endometrial carcinoma cell behavior

## TL;DR

This study shows that silencing Snail-1 with siRNA reduces cancer cell invasion and metastasis in endometrial carcinoma by altering key genes and proteins.

## Contribution

The novel contribution is demonstrating the therapeutic potential of Snail-1 siRNA in modulating EMT and metastasis in endometrial carcinoma cells.

## Key findings

- Snail-1 siRNA significantly reduced Snail-1, MMP-9, Vimentin, and Notch1 expression while increasing E-cadherin.
- Silencing Snail-1 increased apoptosis and reduced migration in HEC-1A cells.
- ERK and AKT mRNA levels decreased, and miR-34a levels increased following Snail-1 silencing.

## Abstract

Investigated within the endometrial carcinoma (EC) context, Snail-1 emerges as a pivotal transcription factor governing invasion and metastasis by orchestrating epithelial-to-mesenchymal transition (EMT). Employing small interfering RNA (siRNA) to silence Snail-1 expression in the HEC-1A cell line, this study explored the repercussions on the expression of genes implicated in metastasis, cellular cytotoxicity, apoptosis, and migration.

HEC-1A cells were transfected with Snail-1-specific siRNA. Quantitative Real-time PCR was utilized to quantify the mRNA levels of Snail-1, Matrix metalloproteinase-9 (MMP-9), Vimentin, E-cadherin, Notch1, ERK, AKT, and miR-34a. Western blot analysis was also performed to ascertain alterations in Snail-1, MMP-9, Vimentin, E-cadherin, and Notch1 protein levels. Cytotoxicity of transfected cells was assessed via the MTT assay, while flow cytometry was employed to measure apoptosis. Migration was evaluated using a wound healing assay.

Transfection with 60 pmol/mL of Snail-1-specific siRNA significantly reduced Snail-1 expression at both the mRNA and protein levels. This was accompanied by decreased MMP-9, Vimentin, and Notch1 expression and increased E-cadherin expression, all confirmed at both transcript and protein levels. Furthermore, gene expression analysis revealed a downregulation of ERK and AKT mRNA levels and an upregulation of miR-34a. Moreover, transfection correlated with increased apoptosis and decreased migration of treated HEC-1A cells.

The study emphasizes the significant influence of Snail-1 on EMT in EC cells, thereby impacting apoptosis and metastasis. Targeted silencing of Snail-1 through specific siRNA emerges as a promising therapeutic approach in treating EC.