It was proved that the knockdown of circ_CCNB2 increased the radiosensitivity of PCa through repressing autophagy by the miR-30b-5p/KIF18A axis, but no biological function of CCNB2 in prostate cancer has been found (Cai F. et al., 2020). The gene discussed is KIF18A; the disease is prostate carcinoma.