The Epstein-Barr Virus-Encoded MicroRNA MiR-BART9 Promotes Tumor Metastasis by Targeting E-Cadherin in Nasopharyngeal Carcinoma
Figure 3
miR-BART9 promotes the migration and invasion of EBV-negative NPC cells.
Transwell migration assay (A) and Matrigel invasion assay (B) for miR-BART9- or LacZ-expressing EBV-negative NPC cells. BM1, TW04 and HK1 cells were infected with the miR-BART9 (BART9) or control (LacZ) vector. Cells expressing miR-BART9 or LacZ were directly compared in terms of migratory activity or invasion activity in the same assay (Left panel). In a separate assay, cells expressing miR-BART9 were treated with a 12.5 nM concentration of an LNA-modified miR-BART9 antisense oligo (anti-BART9) or a scramble control (anti-Ctrl) for 48 hr before the migration or invasion assay (middle panel). Images of cells adhered to the lower surface of the filter insert from a representative experiment are shown. The numbers of migratory or invasive cells were quantified using image J and expressed as the fold change relative to the appropriate cell line (bar graphs). The data are expressed as the means ± SEM from three independent experiments and two-tailed Student's t-tests were performed (*, P<0.05; **, P<0.01; ***, P<0.001). Scale bar = 200 µm.
