Transwell assay reveals that cell migration is inhibited by 53BP1 overexpression. (A) Representative image of migratory SKOV3/pLPC-53BP1 cells (magnification, ×10). (B) Representative image of migratory SKOV3/pLPC-vector cells (magnification, ×10). (C) Compared with migratory SKOV3/pLPC-vector cells, the mean number of migratory SKOV3/pLPC-53BP1 cells was decreased from 230±58 to 45±12 (P<0.05). (D) MMP-9 and MMP-2 activity were assessed using gelatin zymography. (E) Compared with that in SKOV3/pLPC-vector cells, the protein expression of MMP-9 in SKOV3/pLPC-53BP1 cells was significantly inhibited and (F) the protein expression of MMP-2 was not significantly altered. Data were represented as the mean ± standard deviation. *P<0.05 vs. control. 53BP1, tumor protein p53 binding protein 1; MMP, matrix metalloproteinase.