Effect of overexpression of UCA1 on esophageal cancer cells. (A) Expression of UCA1 in esophageal cancer cell lines EC18 and Kyse140 transfected with UCA1-expressing plasmids (vector-UCA1) or negative control plasmids (vector-NC). (B, C) Cell viability of EC18 and Kyse140 cells transfected with UCA1-expressing plasmids (vector-UCA1) or negative control plasmids (vector-NC). Scale bar = 50 nm. (D) Invasive ability of EC18 and Kyse140 cells transfected with UCA1-expressing plasmids (vector-UCA1) or negative control plasmids (vector-NC). Scale bar = 50 nm. (E) Migratory ability of EC18 and Kyse140 cells transfected with UCA1-expressing plasmids (vector-UCA1) or negative control plasmids (vector-NC). Scale bar = 50 nm. (F) Colony formation ability of EC18 and Kyse140 cells transfected with UCA1-expressing plasmids (vector-UCA1) or negative control plasmids (vector-NC). (*) denotes the difference between groups (P<0.05). Each experiment had a minimum of three replicates per treatment group.