Abstract:
BACKGROUND:Abnormal expression of microRNAs (miRNAs) plays an important role in development of several cancer types, including bladder cancer (BCa). However, the relationship between the ratio of miR-181/miR-100 and the prognosis of BCa has not been studied yet. The aim of this study was to evaluate the expression of miR-182, miR-100 and their clinical significance in BCa. METHODS:Upregulation of miR-182 and down-regulation of miR-100 were validated in tissue specimens of 134 BCa cases compared with 148 normal bladder epithelia (NBE) specimens using TaqMan-based real-time reverse transcription quantitative PCR (RT-qPCR). The diagnostic and prognostic evaluation of miR-182, miR-100, and miR-182/miR-100 ratio was also performed. RESULTS:miR-182 was upregulated in BCa and miR-100 was down-regulated in BCa compared with NBE (P < 0.001). The areas under receiver operating characteristic curves (AUCs-ROC) for miR-182 and miR-100 were 0.913 and 0.810, respectively. However, miR-182/miR-100 ratio increased the diagnostic performance, yielding an AUC of 0.981 (97.01% sensitivity and 90.54% specificity). Moreover, miR-182/miR-100 ratio was associated with pT-stage, histological grade, BCa recurrence and carcinoma in situ (P < 0.05 for all). Multivariate Cox regression analysis indicated that miR-182/miR-100 ratio was an independent prognostic factor for overall survival (Hazard ratio: 7.142; 95% CI: 2.106 - 9.891; P < 0.01). Furthermore, Kaplan-Meier curve analysis revealed that high-level of miR-182/miR-100 ratio was significantly correlated with shortened survival time for BCa patients (P < 0.01). CONCLUSION:The miR-182/miR-100 ratio may serve as a novel promising biomarker for diagnosis and survival prediction in BCa. Further studies are needed to elucidate the role of miR-182/miR-100 ratio as a non‑invasive diagnostic tool for BCa.
journal_name
Arch Iran Medjournal_title
Archives of Iranian medicineauthors
Chen Z,Wu L,Lin Q,Shi J,Lin X,Shi Ldoi
0161909/AIM.008subject
Has Abstractpub_date
2016-09-01 00:00:00pages
645-51issue
9eissn
1029-2977issn
1735-3947pii
008journal_volume
19pub_type
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