Knockdown of hsa_circ_0000745 inhibits CC cell proliferation. (a) The expression levels of hsa_circ_0000745 in SiHa and CaSki cells were determined by qRT‐PCR after transfection with three hsa_circ_0000745 siRNAs individually (siRNA‐1, siRNA‐2 and siRNA‐3). (b) The CCK‐8 assay showed that hsa_circ_0000745 knockdown (si‐circ) obviously suppressed the proliferation of SiHa cells compared with cells transfected with the control (si‐NC). (c) The CCK‐8 assay showed that hsa_circ_0000745 knockdown (si‐circ) obviously suppressed the proliferation of CaSki cells compared with cells transfected with si‐NC. (d) The subcutaneous tumor volume of BALB/c mice in the sh‐circ‐0000745 group was smaller than that in the control (sh‐NC). *p < .05, **p < .01, ***p < .001. CC, cervical cancer; CCK‐8, Cell Counting Kit‐8; qRT‐PCR, quantitative reverse transcription polymerase chain reaction; si‐NC, negative siRNA control; siRNA, small interfering RNA [Color figure can be viewed at wileyonlinelibrary.com]