# Synergistic Effect of miR-383 and Cisplatin on Inhibition of Growth, Proliferation, and Migration of Lung Cancer Cells

## TL;DR

This study shows that combining miR-383 with cisplatin improves lung cancer treatment by reducing cell growth and increasing chemotherapy sensitivity.

## Contribution

The novel contribution is demonstrating the synergistic effect of miR-383 and cisplatin in enhancing chemosensitivity and inhibiting lung cancer progression.

## Key findings

- miR-383 transfection increased cisplatin-induced apoptosis in A549 cells from 11.28% to 37.86%.
- Combining miR-383 and cisplatin reduced cell migration and colony formation in lung cancer cells.
- The combination downregulated metastatic and stemness-related genes like MMP-2 and CD44.

## Abstract

Lung cancer (LC) is a common life-threatening malignancy in humans. Cisplatin has been widely used in the treatment of various types of cancer. miR-383 is dysregulated in multiple cancers, and participates in tumorigenic processes, including apoptosis, proliferation, metastasis, and drug resistance. This study aimed to investigate the synergistic effect of miR-383 and cisplatin in LC.

A549 cells were treated with cisplatin and miR-383 separately or in combination. Cell viability, apoptosis induction, stemness features, migratory capacity, and autophagy were measured by various methods. In addition, quantitative real-time PCR (qRT‐PCR) was used to evaluate the expression levels of genes involved in apoptosis, stemness, and migration.

The results demonstrated that miR-383 transfection in A549 cells increased their chemosensitivity to cisplatin, enhancing cisplatin-induced apoptosis (from 11.28% to 37.86%). This effect was mediated by regulating key genes such as Bcl-2 and Caspase-3 (P<0.0001). Moreover, the combination of miR-383 and cisplatin synergistically reduced cell migration and colony formation. It also downregulated metastatic and stemness-related genes, including MMP-2 and CD44, respectively (P<0.0001).

The findings indicate that the combination treatment of miR-383 and cisplatin suppressed cell proliferation, migration and colony formation while enhancing the sensitivity of A549 cells to chemotherapy compared to monotherapy. These results suggest that miR-383 combination therapy warrants further investigation as a potential strategy for LC treatment.