Fig. 4

CircITCH can be used as a sponge for miR-17-5p. a Putative targeting sites for miR-17-5p and circITCH, b assessment of luciferase activity. c Expression yield of miR-17-5p in cells overexpressing circITCH. d Expression levels of miR-17-5p gene in PC tissues and nearby normal tissues (tissues number = 52). e Pearson correlation analysis of miR-17-5p and circITCH in PC tissues (tissues number = 52) (P < 0.001, r = − 0.533). **P  < 0.01, ***P < 0.001