To test the effect of hsa_circ_0001492, miR-145-5p, and OCIAD2 on tumor growth in vivo, we injected PC9 cells stably transfected with sh-hsa_circ_0001492, sh-NC, sh-hsa_circ_0001492+i, sh-hsa_circ_0001492+i-NC, sh-hsa_circ_0001492+OE-OCIAD2, or sh-hsa_circ_0001492+OE-NC into the right cervical subcutis of nude mice. Here, OCIAD2 is linked to neoplasm.