TRPM2-AS facilitates osteosarcoma cell proliferation and migration through the inhibition of miR-15b-5p. (a) CCK-8 assay was performed to detect OS cell viability at 0, 24, 48, and 72 h. (b) BrdU assay was used to detect cell proliferation. Statistical data were obtained by normalizing the original OD value in each group to its corresponding value in the blank group. (c) Wound healing assay was used to detect cell migration. The relative migration rate was measured using the following formula: (W0h−W24 h)/W0 h × 100%, where W represented wound width. (a-c) HOS and SJSA-1 cells were transfected with TRPM2-AS knockdown, miR-15b-5p inhibitor, TRPM2-AS knockdown plus miR-15b-5p inhibitor, or negative control. Blank: blank control; NC: shRNA negative control together with miRNA inhibitor negative control; sh-TRPM2-AS: TRPM2-AS shRNA; inhibitor: miR-15b-5p inhibitor. Data are represented as the mean ± SD. All cellular experiments were performed in triplicates. * P < 0.05, ** P < 0.001 compared with the blank control group. ## P < 0.001 compared with the sh-TRPM2-AS group.