miR-21 downregulates the tumor suppressor P12 CDK2AP1 and stimulates cell proliferation and invasion.

Abstract:

:The present study was undertaken to investigate the regulation of P12(CDK2AP1) by miRNAs. A conserved target site for miR-21 within the CDK2AP1-3'-UTR at nt 349-370 was predicted by bioinformatics software and an inverse correlation of miR-21 and CDK2AP1 protein was observed. Highly specific amplification and quantification of miR-21 was achieved using real-time RT-PCR. Transfection of HaCaT cells with pre-miR-21 significantly suppressed a luciferase reporter including the CDK2AP1-3'-UTR, whereas transfection of Tca8113 with anti-miR-21 increased activity of this reporter. This was abolished when a construct mutated at the miR-21/nt 349-370 target site was used instead. Anti-miR-21-transfected Tca8113 cells showed an increase of CDK2AP1 protein and reduced proliferation and invasion. Resected primary tumors and tumor-free surgical margins of 18 patients with head and neck squamous cell carcinomas demonstrated an inverse correlation between miR-21 and P12(CDK2AP1). This study shows that P12(CDK2AP1) is downregulated by miR-21 and that miR-21 promotes proliferation and invasion in cultured cells.

journal_name

J Cell Biochem

authors

Zheng J,Xue H,Wang T,Jiang Y,Liu B,Li J,Liu Y,Wang W,Zhang B,Sun M

doi

10.1002/jcb.22995

subject

Has Abstract

pub_date

2011-03-01 00:00:00

pages

872-80

issue

3

eissn

0730-2312

issn

1097-4644

journal_volume

112

pub_type

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