Format

Send to

Choose Destination
Eur J Pharmacol. 2017 Jul 15;807:138-143. doi: 10.1016/j.ejphar.2017.03.016. Epub 2017 Mar 11.

miR-455 inhibits breast cancer cell proliferation through targeting CDK14.

Author information

1
General surgery, Fuzhou General Hospital of Nanjing Military Command, Fuzhou 350025, Fujian, China.
2
Oncology Department of the First People's Hospital of Shunde, FoShan 528300, Guangdong, China.
3
Institute of laboratory medicine, Fuzhou General Hospital of Nanjing Military Command, Fuzhou 350025, Fujian, China.
4
Department of Medical Oncology, Fuzhou General Hospital of Nanjing Military Command, Fuzhou 350025, Fujian, China.
5
Burn and Plastic surgery, Fuzhou General Hospital of Nanjing Military Command, Fuzhou 350025, Fujian, China.
6
Burn and Plastic surgery, Fuzhou General Hospital of Nanjing Military Command, Fuzhou 350025, Fujian, China. Electronic address: tiantaiat@sina.com.

Abstract

Breast cancer is the most frequently occurring cancer in women worldwide, microRNAs (miRNAs) play critical role in the initiation and progression of breast cancer. Here, we studied the effect of miR-455 on cell proliferation of breast cancer, and found that miR-455 was downregulated in breast cancer tissues and cells. Its overexpression inhibited cell proliferation, whereas its knockdown promoted cell proliferation of breast cancer. We found a Cdc2-related protein kinase CDK14 was the target of miR-455, when the 3'UTR of CDK14 was cloned into luciferase reporter vector and transfected into cells, miR-455 mimic could inhibit the luciferase activity in a dose-dependent manner, miR-455 inhibitor increased the luciferase activity, but the mutant miR-455 mimic couldn't change the luciferase activity, suggesting miR-455 directly bound to the 3'UTR of CDK14. Meanwhile, we also found miR-455 inhibited Cyclin D1 expression and promoted p21 expression, confirming miR-455 inhibited cell proliferation. Double knockdown of miR-455 and CDK14 inhibited the proliferation of breast cancer cell, confirming miR-455 inhibiting cell proliferation by targeting CDK14. Moreover, miR-455 levels were negatively correlated with CDK14 levels in breast cancer tissues. Our finding revealed miR-455 inhibits breast cancer cell proliferation through targeting CDK14, it might be a target for breast cancer therapy.

KEYWORDS:

Breast cancer; CDK14; Cell proliferation; MiR-455

PMID:
28300591
DOI:
10.1016/j.ejphar.2017.03.016
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center