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Wound-healing and Transwell assays of lung cancer cell lines. (A, B) Relative migrating areas after transfection of miR-21/let-7 inhibitors or mimics at 0 and 48 h. (C–F) Relative invasion areas after transfection of miR-21/let-7 inhibitors or mimics in lung cancer cell lines (scale bar: 100 μm; *p < 0.05; **p < 0.01; ***p < 0.001).
