miRNA-22 suppresses colon cancer cell migration and invasion by inhibiting the expression of T-cell lymphoma invasion and metastasis 1 and matrix metalloproteinases 2 and 9

Li,Bo; Song,Yan; Liu,Tong-Jun; Cui,You-Bin; Jiang,Yang; Xie,Zhong-Shi; Xie,Shu-Li

doi:10.3892/or.2013.2300

miRNA-22 suppresses colon cancer cell migration and invasion by inhibiting the expression of T-cell lymphoma invasion and metastasis 1 and matrix metalloproteinases 2 and 9

Authors:
- Bo Li
- Yan Song
- Tong-Jun Liu
- You-Bin Cui
- Yang Jiang
- Zhong-Shi Xie
- Shu-Li Xie
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Affiliations: Department of Colorectal and Anal Surgery, The Third Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China, Department of Thoracic Surgery, The First Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China, Department of Hepatobiliary Surgery, The First Affiliated Hospital of Jilin University, Changchun, Jilin, P.R. China
Published online on: February 22, 2013 https://doi.org/10.3892/or.2013.2300
Pages: 1932-1938

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Abstract

Emerging evidence has demonstrated the altered expression of mRNAs in cancer development and progression. In this study, the precise role of miRNA-22 (miR-22) in colon cancer cells was investigated. Upon transfection with a miR-22 expression vector, the viability of HCT-116 human colon cancer cells was significantly reduced and tumor cell migration and invasion capacity were also suppressed. Computational in silico analysis predicted that T-cell lymphoma invasion and metastasis 1 (TIAM1) is a target gene of miR-22. This was confirmed by qRT-PCR and western blotting, which showed that miR-22 expression inhibited TIAM1 mRNA and protein expression, respectively. In addition, the expression of pro-invasive gene matrix metalloproteinases 2 and 9 (MMP-2 and MMP-9) and pro-angiogenic protein vascular endothelial growth factor (VEGF) were also reduced by miR-22 expression. Collectively, these data suggest that miR-22 may act as a tumor suppressor in colon cancer, most likely by targeting TIAM1 expression.

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