A panel of five serum miRNAs as a potential diagnostic tool for early-stage renal cell carcinoma

Cheng Wang, Jicheng Hu, Meiling Lu, Hongwei Gu, Xiaojun Zhou, Xi Chen, Ke Zen, Chen-Yu Zhang, Tiehui Zhang, Jingping Ge, Junjun Wang, Chunni Zhang, Cheng Wang, Jicheng Hu, Meiling Lu, Hongwei Gu, Xiaojun Zhou, Xi Chen, Ke Zen, Chen-Yu Zhang, Tiehui Zhang, Jingping Ge, Junjun Wang, Chunni Zhang

Abstract

Circulating microRNAs (miRNAs) are emerging as clinically useful tools for cancer detection; however, little is known about their early diagnostic impact on RCC. The levels of 754 serum miRNAs were initially determined using a TaqMan Low Density Array in two pooled samples from 25 RCC and 25 noncancer controls. Markedly dysregulated miRNAs in RCC cases were subsequently validated individually by qRT-PCR in another 107 patients and 107 controls arranged in two sets. The serum levels of miR-193a-3p, miR-362 and miR-572 were significantly increased whereas the levels of miR-28-5p and miR-378 were markedly decreased in patients with RCC, even in those with stage I disease, compared with the noncancer controls (P < 0.01). The areas under the ROC curve (AUCs) for the 5 combined miRNAs were 0.807 (95% CI, 0.687-0.928) and 0.796 (95% CI, 0.724-0.867) for the training set and the validation set, respectively. Furthermore, the panel enabled the differentiation of stage I RCC from controls with AUC of 0.807 (95% CI, 0.731-0.871), a sensitivity of 80% and a specificity of 71%. This panel of 5 serum miRNA may have the potential to be used clinically as an auxiliary diagnostic tool for the early detection of RCC.

Figures

Figure 1. An overview of study design…
Figure 1. An overview of study design strategy.
Figure 2. The relative contents of 5…
Figure 2. The relative contents of 5 identified serum miRNAs in RCC cases at different stages enrolled in the training and validation sets.
The relative contents of 5 identified serum miRNAs in 76 stage I, 16 stage II, 2 stage III, 8 stage grade IV and 5 unknown stage RCC patients and 107 noncancer controls using a qRT-PCR assay (A–E). The contents of the miRNAs were normalized to let-7d/g/i and calculated using the 2−ΔΔCq method. Each point represents the mean of triplicate samples. Each P-value was derived from a nonparametric Mann–Whitney U-test. *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001.
Figure 3. The ROC curve analysis for…
Figure 3. The ROC curve analysis for discriminative ability between RCC cases and noncancer controls by the 5-miRNA panel.
ROC curves for the 5-miRNA panel to separate 28 RCC cases from 28 controls in the training set (A), 79 RCC cases from 79 controls in the validation set (B), 76 stage I RCC cases from 107 controls in the training and validation sets (C) and 92 stage I–II RCC cases from 107 controls in the training and validation sets (D).

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Source: PubMed

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