POU3F3 adjacent non-coding transcript 1 (PANTR1) is an oncogenic long non-coding RNA with significant influence on numerous cellular features in different types of cancer. No characterization of its role in renal cell carcinoma (RCC) is yet available. In this study, PANTR1 expression was confined to human brain and kidney tissue and was found significantly up-regulated in clear-cell renal cell carcinoma tissue (ccRCC) compared to non-cancerous kidney tissue in two independent cohorts (p < 0.001 for both cohorts). In uni- and multivariate Cox regression analysis, ccRCC patients with higher levels of PANTR1 showed significantly poorer disease-free survival in our own respective cohort (n = 175, hazard ratio: 4.3, 95% confidence interval: 1.45-12.75, p = 0.008) in accordance with significantly poorer overall survival in a large The Cancer Genome Atlas database (TCGA) cohort (n = 530, hazard ratio: 2.19, 95% confidence interval: 1.59-3.03, p ≤ 0.001). To study the underlying cellular mechanisms mediated by varying levels of PANTR1 in kidney cancer cells, we applied siRNA-mediated knock-down experiments in three independent ccRCC cell lines (RCC-FG, RCC-MF, 769-P). A decrease in PANTR1 levels led to significantly reduced cellular growth through activation of apoptosis in all tested cell lines. Moreover, as angiogenesis is a critical driver in ccRCC pathogenesis, we identified that PANTR1 expression is critical for in vitro tube formation and endothelial cell migration (p < 0.05). On the molecular level, knock-down of PANTR1 led to a decrease in Vascular Endothelial growth factor A (VEGF-A) and cell adhesion molecule laminin subunit gamma-2 (LAMC2) expression, corroborated by a positive correlation in RCC tissue (for VEGF-A R = 0.19, p < 0.0001, for LAMC2 R = 0.13, p = 0.0028). In conclusion, this study provides first evidence that PANTR1 has a relevant role in human RCC by influencing apoptosis and angiogenesis.

Central European Institute of Technology Masaryk University 62500 Brno Czech Republic

Central European Institute of Technology Masaryk University 62500 Brno Czech Republic Department of Biology Faculty of Medicine Masaryk University 62500 Brno Czech Republic

Department of Urology Medical University of Graz 8036 Graz Austria

Department of Urology Medical University of Innsbruck 6020 Innsbruck Austria

Division of Oncology Department of Internal Medicine Medical University of Graz 8036 Graz Austria

Division of Oncology Department of Internal Medicine Medical University of Graz 8036 Graz Austria Non coding RNAs and Genome Editing in Cancer Research Unit Medical University of Graz 8036 Graz Austria

Division of Oncology Department of Internal Medicine Medical University of Graz 8036 Graz Austria Non coding RNAs and Genome Editing in Cancer Research Unit Medical University of Graz 8036 Graz Austria Department of Experimental Therapeutics The University of Texas MD Anderson Cancer Center Houston TX 77030 USA

Citace poskytuje Crossref.org