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. 2016 Jun 28;115(1):12-9.
doi: 10.1038/bjc.2016.146. Epub 2016 Jun 23.

Association of tumour microRNA profiling with outcomes in patients with advanced urothelial carcinoma receiving first-line platinum-based chemotherapy

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Association of tumour microRNA profiling with outcomes in patients with advanced urothelial carcinoma receiving first-line platinum-based chemotherapy

Joaquim Bellmunt et al. Br J Cancer. .

Abstract

Background: Tumour expression of selected microRNAs (miRs) correlates with cisplatin efficacy in multiple cancers. We investigated the role of selected miRs in patients receiving cisplatin-based therapy for advanced urothelial carcinoma (UC).

Methods: RNA was extracted from formalin-fixed paraffin-embedded tumour from 83 advanced UC patients who received cisplatin. A miR panel based on relevance for platinum sensitivity and UC was studied by quantitative reverse transcription quantitative PCR (RT-qPCR). Association of progression-free survival (PFS) with miR expression was analysed using cox regression. Selected TFs were chosen by association with the panel of miRs using the Transcription Regulation algorithm (GeneGo MetaCore+MetaDrug version 6.23 build 67496). Bladder cancer (BC) cell lines were used to investigate the previously described role of miR-21 mediating cisplatin sensitivity.

Results: The 83 patients had a median PFS of 8 months. In multivariate analysis, higher levels of E2F1 (P=0.01, HR: 1.95 (1.14, 3.33)), miR-21 (P=0.01, HR: 2.01 (1.17, 3.45)) and miR-372 (P=0.05, HR: 1.70 (1.00, 2.89)) were associated with a shorter PFS. In the 8 BC cell lines, miR-21 was not shown to be necessary nor sufficient for modulating cisplatin sensitivity.

Conclusions: In metastatic UC patients treated with cisplatin-based therapy, high primary tumour levels of E2F1, miR-21 and miR-372 are associated with poor PFS independent of clinical prognostic factors. The in vitro study could not confirm miR-21 levels role in modulating platinum sensitivity.

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Conflict of interest statement

JB: consultant for Pierre Fabre, Astellas, Pfizer, Merck and Genentech. Research funding from Takeda and Sanofi. GS: research support from Onyx, Bayer and Boehringer-Ingelheim; advisory board/consultant for Merck, Genentech, Sanofi, Bayer, Pfizer and Novartis. The remaining authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Progression-free survival (PFS) based on high tumour miRNA levels of miR-21 (A), miR-372 (B), E2F1 (C) and combination of miR-21 and E2F1 (D).
Figure 2
Figure 2
Sensitivity of bladder cancer cell lines to cisplatin in vitro.

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