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Neoplasma Vol.63, No.4, p.576-587,2016 |
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Title: Prognostic significance of miR-23b in combination with P-gp, MRP and LRP/MVP expression in non-small cell lung cancer | ||
Author: M. JANIKOVA, V. ZIZKOVA, J. SKARDA, G. KHARAISHVILI, L. RADOVA, Z. KOLAR | ||
Abstract: Recently, miR-23b has emerged as a promising new cancer biomarker but its role in lung cancer has not been established yet. Patients still do not respond well to available treatments, probably due to expression of multidrug resistance (MDR) proteins, such as P-gp, MRP and LRP/MVP. The aim of this study was to determine the role of miR-23b in non-small cell lung cancer (NSCLC) and its relationship to the patient outcome together with MDR transporter proteins. We immunohistochemically evaluated expression of P-gp, MRP and LRP/MVP and quantified the relative levels of miR-23b in 62 NSCLC patients´ samples. The prognostic significance of miR-23b and MDR proteins was tested by Kaplan-Meier and Cox-regression analysis. Our results showed that miR-23b is mostly downregulated in NSCLC samples (57/62) and that its upregulation in tumors is connected with longer progression-free survival (PFS; P = 0.065) and overall survival (OS; P = 0.048). The Cox proportional hazard model revealed that the risk of death or relapse in NSCLC patients with miR-23b downregulation increases together with LRP/MVP expression and both risks decrease with miR-23b upregulation (HRPFS = 4.342, PPFS = 0.022; HROS = 4.408, POS = 0.015). Our findings indicate that miR-23b, especially in combination with LRP/MVP expression, might serve as a suitable prognostic biomarker for NSCLC patients. |
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Keywords: non-small cell lung cancer (NSCLC), MiR-23b, P-gp, MRP, LRP/MVP, prognosis | ||
Published online: 14-Jul-2016 | ||
Year: 2016, Volume: 63, Issue: 4 | Page From: 576, Page To: 587 | |
doi:10.4149/neo_2016_411 |
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