Circulating miR-497 and miR-663b in plasma are potential novel biomarkers for bladder cancer

• Published in: Scientific reports Vol. 5; no. 1; p. 10437
• Main Authors: Du, Mulong, Shi, Danni, Yuan, Lin, Li, Pengchao, Chu, Haiyan, Qin, Chao, Yin, Changjun, Zhang, Zhengdong, Wang, Meilin
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 27.05.2015; Nature Publishing Group
• Subjects: 38/39; 631/67/1857; 631/67/589/1336; Adult; Aged; Area Under Curve; Biomarkers; Biomarkers, Tumor - blood; Bladder cancer; Cancer; Case-Control Studies; Female; Humanities and Social Sciences; Humans; Male; MicroRNAs - blood; Middle Aged; miRNA; multidisciplinary; Phenotype; Plasma; Polymerase chain reaction; Real-Time Polymerase Chain Reaction; ROC Curve; Science; Urinary bladder; Urinary Bladder Neoplasms - diagnosis; Urinary Bladder Neoplasms - genetics; Urinary Bladder Neoplasms - pathology
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/srep10437

MicroRNAs (miRNAs), abundant and highly stable in the plasma, have been widely reported. This greatly pursued us to investigate whether plasma miRNAs could be considered as powerful biomarkers for diagnosing bladder cancer (BC). We performed a plasma miRNAs profile with the TaqMan Low Density Array and a two-phase validation to detect the candidate miRNAs expression by quantitative PCR. The receiver operating characteristic curve (ROC) and the area under curve (AUC) were used to evaluate diagnostic accuracy. A total of eight plasma miRNAs abnormally expressed between BC patients and healthy controls in microarray analysis (i.e., elevated miRNAs for miR-505, miR-363 and miR-663b and decreased for miR-99a, miR-194, miR-100, miR-497 and miR-1 in BC plasma). In further independent cohorts, miR-497 and miR-663b with significantly differential expression were confirmed. Moreover, the AUC, sensitivity and specificity were raised to 0.711 (95% CI = 0.641-0.780), 69.7% and 69.6%, respectively, when miR-497 and miR-663b were integrated. This is the first study systematically exploring the existence of specific plasma miRNAs as early diagnostic biomarkers for BC in Chinese population; and these findings supported that plasma miR-497 and miR-663b could be promising novel circulating biomarkers in clinical detection of BC.