Figure 2. MITF promotes cell invasion and migration in lung adenocarcinoma cells. (A) The silencing efficiency of shMITF to different MITF isoforms in CL1-0 cells was measured by isoform-specific RT-PCR. Controls included RT-PCR for the common MITF exons 5-9 and GAPDH. (B) The cell invasive ability of CL1-0 cells was assayed after transiently delivering the shMITF expressing plasmids with different doses. Mock: vector transfectant; Scramble: scramble transfectant. *p < 0.05 (mean ± SD, n = 3) (C) The cell invasive ability of CL1-5 cells was assayed after overexpression of MITF-A with different doses. *p < 0.05 (mean ± SD, n = 3) (D) The cell invasive and migratory abilities of stably MITF-silenced cells were assayed by using Boyden chamber assays with and without Matrigel, respectively. *p<0.05 (mean ± SD, n = 3) (E) Re-expressed MITF-A in stably MITF-silenced cells were assayed for the cell invasion and migration. *p < 0.05 (mean ± SD, n = 3) (F) The anchorage-independent colony formation ability of stably MITF-silenced cells was assayed. Scale bar, 100 μm. *p < 0.05 (mean ± SD, n = 3).