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Piwi-interacting RNAs as novel prognostic markers in clear cell renal cell carcinomas

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Item Type:Article
Title:Piwi-interacting RNAs as novel prognostic markers in clear cell renal cell carcinomas
Creators Name:Busch, J. and Ralla, B. and Jung, M. and Wotschofsky, Z. and Trujillo-Arribas, E. and Schwabe, P. and Kilic, E. and Fendler, A. and Jung, K.
Abstract:BACKGROUND: Piwi-interacting RNAs (piRNAs) are small RNAs of 27-30 nucleotides mapping to transposons or clustering in repeat genomic regions. Preliminary studies suggest an important role in cancerogenesis. This study is the first one investigating their prognostic impact in clear cell renal cell cancer (ccRCC) patients. METHODS: Three piRNAs (piR-30924, piR-57125, and piR-38756) selected on the basis of initial piRNA microarray analyses were determined using RT-qPCR in non-metastatic (n = 76) and metastatic (n = 30) ccRCC tissue at the time of nephrectomy in comparison to normal renal tissue (n = 77) and tissue from distant ccRCC metastases (n = 13). Primary clinical end points were recurrence-free and overall survival. RESULTS: piR-57125 showed lower expression in metastatic than in non-metastatic tumors, whereas the expression of piR-30924 and piR-38756 increased in metastatic tumors. The higher expression of piR-30924 and piR-38756 as well as the lower expression of piR-57125 in metastatic primary tumors were significantly associated with tumor recurrence and overall survival. Multivariate Cox regression analyses revealed both piR-30924 and piR-57125 as independent prognostic predictors. This impact was even more pronounced in non-metastatic patients. CONCLUSIONS: This study demonstrates that the expression levels of these piRNAs in primary non-metastatic and metastatic ccRCC tissue can serve as potential prognostic biomarkers in combination with clinicopathological factors.
Keywords:Clear Cell Renal Cell Carcinoma, piRNA, Prognosis, Metastasis, Recurrence, Overall Survival
Source:Journal of Experimental & Clinical Cancer Research
Publisher:Biomed Central Ltd.
Page Range:61
Date:14 June 2015
Official Publication:https://doi.org/10.1186/s13046-015-0180-3
PubMed:View item in PubMed

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