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Comparative Study
. 2010 Jul 7;29(1):90.
doi: 10.1186/1756-9966-29-90.

Expression of miRNA-106b in conventional renal cell carcinoma is a potential marker for prediction of early metastasis after nephrectomy

Ondrej Slaby  1 , Jana Jancovicova, Radek Lakomy, Marek Svoboda, Alexandr Poprach, Pavel Fabian, Leos Kren, Jaroslav Michalek, Rostislav Vyzula
Affiliations
Comparative Study

Expression of miRNA-106b in conventional renal cell carcinoma is a potential marker for prediction of early metastasis after nephrectomy

Ondrej Slaby et al. J Exp Clin Cancer Res. .

Erratum in

  • J Exp Clin Cancer Res. 2010;29:105

Abstract

Background: MicroRNAs are endogenously expressed regulatory noncoding RNAs. Previous studies have shown altered expression levels of several microRNAs in renal cell carcinoma.

Methods: We examined the expression levels of selected microRNAs in 38 samples of conventional renal cell carcinoma (RCC) and 10 samples of non-tumoral renal parenchyma using TaqMan real-time PCR method.

Results: The expression levels of miRNA-155 (p < 0.0001), miRNA-210 (p < 0.0001), miRNA-106a (p < 0.0001) and miRNA-106b (p < 0.0001) were significantly over-expressed in tumor tissue, whereas the expression of miRNA-141 (p < 0.0001) and miRNA-200c (p < 0.0001) were significantly decreased in RCC samples. There were no significant differences between expression levels of miRNA-182 and miRNA-200b in tumor samples and renal parenchyma. Our data suggest that expression levels of miRNA-106b are significantly lower in tumors of patients who developed metastasis (p = 0.030) and miR-106b is a potential predictive marker of early metastasis after nephrectomy in RCC patients (long-rank p = 0.032).

Conclusions: We have confirmed previous observations obtained by miRNA microarray analysis using standardized real-time PCR method. For the first time, we have identified a prognostic significance of miRNA-106b, which, after validation on a larger group of patients, maybe useful as a promising biomarker in patients with RCC.

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Figures

Figure 1
Figure 1
Comparison of miR-155, miR-210, miR-106a and miR-106b expression levels in renal parenchyma (RP) and renal cell carcinomas (RCC).
Figure 2
Figure 2
Comparison of miR-200c and miR-141 (tumor suppressive miR-200 family) expression levels in RP and RCC.
Figure 3
Figure 3
Comparison of miR-106b expression levels in RCC stratified according to the development of metastatic disease after nephrectomy.
Figure 4
Figure 4
Relapse-free survival of patients with RCC based on the miR-106b expression levels (cutoff = median of miR-106b expression).
See this image and copyright information in PMC

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