miR-542-3p inhibits the growth and invasion of colorectal cancer cells through targeted regulation of cortactin

Long,Hao-Cheng; Gao,Xia; Lei,Chang-Jiang; Zhu,Bin; Li,Lei; Zeng,Cheng; Huang,Jian-Bin; Feng,Jia-Rui

doi:10.3892/ijmm.2016.2505

miR-542-3p inhibits the growth and invasion of colorectal cancer cells through targeted regulation of cortactin

Authors:
- Hao-Cheng Long
- Xia Gao
- Chang-Jiang Lei
- Bin Zhu
- Lei Li
- Cheng Zeng
- Jian-Bin Huang
- Jia-Rui Feng
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Affiliations: Department of General Surgery, The Fifth Hospital of Wuhan, Wuhan, Hubei 430050, P.R. China, Department of Oncology, The Fifth Hospital of Wuhan, Wuhan, Hubei 430050, P.R. China
Published online on: February 25, 2016 https://doi.org/10.3892/ijmm.2016.2505
Pages: 1112-1118

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Abstract

Colorectal cancer is one of the most common malignancies. Previous studies have reported that cortactin (CTTN) is often overexpressed in tumors and is associated with metastasis and poor prognosis of patients. The abnormal expression of microRNAs (miRNAs or miRs) is closely related to the development and progression of various types of cancer, including colorectal cancer. However, little is known about the miRNAs targeting cortactin. In the present study, prediction using biological software revealed that cortactin has binding sites for miR-542-3p. Transfection with miR-542-3p mimic demonstrated that miR‑542-3p reduced the expression of cortactin in colorectal cancer cells. Dual luciferase reporter assays further demonstrated that miR-542-3p regulated cortactin in a targeted manner and that miR-542-3p expression was significantly downregulated in colorectal cancer cells. A cell proliferation assay and Transwell migration assay were undertaken: we noted that miR‑542-3p inhibited the proliferation and invasion of colorectal cancer cells while promoting their apoptosis. By contrast, cortactin acted antagonistically. When co-transfected with miR-542-3p mimic and CTTN overexpression vector, the inhibitory effect of miR-542-3p was blocked. This indicates that miR-542-3p regulates CTTN in a targeted manner to modulate the growth and invasion of colorectal cancer cells. The present study thus provides new targets for the prevention and treatment of colorectal cancer.

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