Background: Cancer is one of the major causes of human deaths at present. It is the leading
cause of deaths in developed countries. Moreover, Circular RNAs (circRNAs) have been discovered
to play important roles in tumor genesis and development and are abnormally expressed in
bladder cancer .
Objective: The present study aims to investigate the anti-cancer effects of circ 001418 on bladder
carcinoma and its possible mechanism.
Methods: Quantitative PCR (qPCR) and gene chip were used to measure the circ 001418 expression.
Cell proliferation and transfer, apoptosis and caspase-8 and caspase-3 activity levels were
measured using MTT, Transwell assay, Flow cytometry. Caspase-3 and 9 activity levels, EphA2,
cytochrome c and FADD protein expression, were detected using Western blotting.
Results: The expression of circ 001418 was increased in patients with bladder carcinoma. Over-expression
of circ 001418 promoted cell proliferation and transfer, and reduced apoptosis in vitro
model of bladder carcinoma. Down-regulation of Circ 001418 inhibited cell proliferation and transfer,
and induced apoptosis in vitro model of bladder carcinoma. Meanwhile, over-expression of
circ 001418 induced EphA2 and cytochrome c protein expression, and suppressed FADD protein
expression in vitro model of bladder carcinoma by the suppression of miR-1297. MiR-1297 reduced
the pro-cancer effect of circ 001418 on apoptosis of bladder carcinoma.
Conclusion: Results showed that circRNA 001418 promoted cell growth and metastasis of bladder
carcinoma via EphA2 by miR-1297.