Background: The current study aimed to evaluate the expression of circular RNA (circRNA) CDR1as in bladder urothelial carcinoma and adjacent normal tissues, thereby laying the foundation for the research of bladder urothelial carcinoma.
Methods: The level of CDR1as was evaluated in the tissues of bladder urothelial carcinoma patients. ROC analysis was carried out to explore the possible diagnostic value of CDR1as.
Results: In the current study, we showed novel data that the expression of CDR1as in bladder urothelial carcinoma tissues was significantly higher than that in adjacent tissues. Furthermore, the expression of CDR1as was significantly higher in non-muscle invasive bladder cancer (NMIBC) and high-grade cancer tissues than in muscle invasive bladder cancer (MIBC) and low-grade cancer tissues. In patients with lymph node metastasis, the expres-sion of CDR1as was also significantly higher. Moreover, the expression of CDR1as was higher in high-stage, high-grade bladder urothelial carcinoma than in low-stage and low-grade cancer tissues. Real time PCR analysis showed that there was no difference in the expression of CDR1as among the patients according to the grouping of gender (male vs. female), age (≤ 65 years vs. > 65 years), tumor size (≤ 3 cm vs. > 3 cm), and lymphatic invasion (LVI).
Conclusions: The current study for the first time showed upregulation of CDR1as may be involved in the development and progression of bladder urothelial carcinoma.