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miR-192, miR-194 and miR-215: a convergent microRNA network suppressing tumor progression in renal cell carcinoma.
- Source :
-
Carcinogenesis [Carcinogenesis] 2013 Oct; Vol. 34 (10), pp. 2231-9. Date of Electronic Publication: 2013 May 28. - Publication Year :
- 2013
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Abstract
- MicroRNAs (miRNAs) play a crucial role in tumor progression and metastasis. We, and others, recently identified a number of miRNAs that are dysregulated in metastatic renal cell carcinoma compared with primary renal cell carcinoma. Here, we investigated three miRNAs that are significantly downregulated in metastatic tumors: miR-192, miR-194 and miR-215. Gain-of-function analyses showed that restoration of their expression decreases cell migration and invasion in renal cell carcinoma cell line models, whereas knockdown of these miRNAs resulted in enhancing cellular migration and invasion abilities. We identified three targets of these miRNAs with potential role in tumor aggressiveness: murine double minute 2, thymidylate synthase, and Smad Interacting protein 1/zinc finger E-box binding homeobox 2. We observed a convergent effect (the same molecule can be targeted by all three miRNAs) and a divergent effect (the same miRNA can control multiple targets) for these miRNAs. We experimentally validated these miRNA-target interactions using three independent approaches. First, we observed that miRNA overexpression significantly reduces the mRNA and protein levels of their targets. In the second, we observed significant reduction of the luciferase signal of a vector containing the 3'UTR of the target upon miRNA overexpression. Finally, we show the presence of inverse correlation between miRNA changes and the expression levels of their targets in patient specimens. We also examined the prognostic significance of miR-215 in renal cell carcinoma. Lower expression of miR-215 is associated with significantly reduced disease-free survival time. These findings were validated on an independent data set from The Cancer Genome Atlas. These results can pave the way to the clinical use of miRNAs as prognostic markers and therapeutic targets.
- Subjects :
- Biomarkers, Tumor genetics
Carcinoma, Renal Cell mortality
Carcinoma, Renal Cell pathology
Cell Line, Tumor
Cell Movement genetics
Cell Proliferation
Disease Progression
Gene Expression
Gene Expression Regulation, Neoplastic
Homeodomain Proteins genetics
Homeodomain Proteins metabolism
Humans
Kidney Neoplasms mortality
Kidney Neoplasms pathology
Neoplasm Invasiveness
Prognosis
Proto-Oncogene Proteins c-mdm2 genetics
Proto-Oncogene Proteins c-mdm2 metabolism
RNA Interference
Repressor Proteins genetics
Repressor Proteins metabolism
Zinc Finger E-box Binding Homeobox 2
Carcinoma, Renal Cell genetics
Gene Regulatory Networks
Kidney Neoplasms genetics
MicroRNAs genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1460-2180
- Volume :
- 34
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Carcinogenesis
- Publication Type :
- Academic Journal
- Accession number :
- 23715501
- Full Text :
- https://doi.org/10.1093/carcin/bgt184