Abstract |
MicroRNAs ( miRNAs) are closely associated with cell proliferation, invasion and metastasis in various types of cancer, including prostate cancer. In this study, the role of miR-429 in the regulation of cell proliferation was investigated in prostate cancer cells. miR-429 expression levels were measured in the IF11 and IA8 prostate cancer cell lines and normal prostate epithelial tissues by quantitative polymerase chain reaction. miR-429 mimics or an miR-429 inhibitor were then transfected into the human prostate cancer cell lines. MTT and fluorescence-activated cell sorting were used to detect the effect of miR-429 on cell proliferation. A luciferase reporter system was employed to verify the potential target of miR-429. The results revealed that miR-429 was significantly upregulated in the human prostate cancer cell lines, compared with the normal prostate epithelial tissue. Downregulation of miR-429 expression in IF11 and IA8 cells inhibited cell proliferation and arrested the cells in the G1 phase of the cell cycle. The luciferase assay demonstrated that p27Kip1 was a direct target of miR-429. Furthermore, overexpression of p27Kip1 was observed to partially rescue the proliferation‑promoting effect of miR-429 on IA8 cells. In conclusion, to the best of our knowledge this study was the first to show that miR-429 is involved in the oncogenesis of prostate cancer and thus may be a novel prognostic biomarker in prostate cancer.
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Authors | Yongri Ouyang, Ping Gao, Baoyi Zhu, Xi Chen, Fang Lin, Xi Wang, Junxia Wei, Huizhong Zhang |
Journal | Molecular medicine reports
(Mol Med Rep)
Vol. 11
Issue 2
Pg. 1435-41
(Feb 2015)
ISSN: 1791-3004 [Electronic] Greece |
PMID | 25351256
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- 3' Untranslated Regions
- MIRN429 microRNA, human
- MicroRNAs
- RNA, Double-Stranded
- Cyclin-Dependent Kinase Inhibitor p27
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Topics |
- 3' Untranslated Regions
- Base Sequence
- Binding Sites
- Cell Line, Tumor
- Cell Proliferation
(genetics)
- Cyclin-Dependent Kinase Inhibitor p27
(chemistry, genetics, metabolism)
- Down-Regulation
- G1 Phase Cell Cycle Checkpoints
- Humans
- Male
- MicroRNAs
(antagonists & inhibitors, genetics, metabolism)
- Prostatic Neoplasms
(genetics, pathology)
- RNA, Double-Stranded
(metabolism)
- Sequence Alignment
- Transfection
- Up-Regulation
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