miR-30d-5p represses the proliferation, migration, and invasion of lung squamous cell carcinoma via targeting DBF4

Abstract

Objective

This study aims to explore the mechanism of miR-30d-5p in regulating the development of lung squamous cell carcinoma (LUSC) via targeting DBF4.

Methods

Bioinformatics methods were employed to analyze the differentially expressed genes in LUSC tissue microarray. qRT-PCR was employed to detect the expression of miR-30d-5p and DBF4 mRNA in normal human bronchial epithelial cells and LUSC cells. CCK-8 was used to detect LUSC cell activity. Wound healing assay was employed to detect the migratory ability of LUSC cells. Transwell was employed to detect invasive ability. Dual-luciferase reporter assay was used to detect the targeting relationship between miR-30d-5p and DBF4. Western blot was used to detect the protein expression of marker molecules associated with epithelial–mesenchymal transition (EMT).

Results

In this study, the expression of miR-30d-5p in LUSC cell lines was found to be obviously low compared with that in normal human bronchial epithelial cell line, which was opposite to the expression of DBF4. Dual-luciferase reporter assay verified that miR-30d-5p could target DBF4 and the overexpression of miR-30d-5p downregulated the expression of DBF4. Overexpression of DBF4 promoted the proliferation, migration, invasion, and EMT of LUSC, whereas over-expression of miR-30d-5p could weaken the promotion of DBF4 on cancer cells.

Conclusion

miR-30d-5p downregulates the expression of DBF4 to regulate the development of LUSC.

Keywords:

• DBF4
• miR-30d-5p
• lung squamous cell carcinoma
• proliferation
• migration and invasion
• EMT

Disclosure statement

None declared

Ethical approval

Not required

Data availability statement

The data of the current manuscript can be available from those links listed below:

https://portal.gdc.cancer.gov/,

http://ophid.utoronto.ca/mirDIP/index.jsp#r, http://mirtarbase.mbc.nctu.edu.tw/php/index.php,

http://mirdb.org, http://starbase.sysu.edu.cn/,

http://www.targetscan.org/vert_72/.