The experiment was divided into DMEM-F12 medium, hUCMSCs, hUCMSCs-LV-vector, hUCMSCs-LV-IL-21, miR-200c, hUCMSCs-LV-IL-21 combined with miR-200c, and cisplatin groups. The SKOV-3 cells were put in the upper chamber of the Transwell, and DMEM-F12 medium, hUCMSCs, hUCMSCs-LV-vector, hUCMSCs-LV-IL-21 were respectively put in the bottom chamber of the Transwell. In the hUCMSCs-LV-IL-21 combined with miR-200c group, SKOV-3 cells transfected with miR-200c mimic were put in the upper chamber, and hUCMSCs-LV-IL-21 were put in the bottom one; in the miR-200c group, SKOV-3 cells transfected with miR-200c mimic were put in the upper chamber, and DMEM-F12 medium were put in the bottom one; in the cisplatin group, SKOV-3 cells were put in the upper chamber, and 10 µg cisplatin/mL were put in the bottom one. After 24-h coculture, cells were grown to confluence and wounded by dragging a 1-mL pipette tip across their monolayer. Cells were washed to remove any cellular debris. Images were taken, using a DMI6000 inverted microscope (Leica Microsystems, Wetzlar, Germany), at 0, 24, and 72 h, respectively, after the wounding procedure.20 (link),21 (link)