Galectin-3 promotes NSCLC cell migration and invasion under hypoxia. The effect of hypoxia-induced galectin-3 on Wt cells and cells transfected with galectin-3 shRNA (Gal3 shRNA #1, #2) or scrambled control shRNA (scr #1, #2) on cell migration and invasion in NSCLC cells (A549 and LK-2) was assessed by a (A) scratch and an (B) invasion assays. (C) A549 and LK-2 cells transfected with galectin-3 shRNA were cultured with the indicated concentrations of recombinant galectin-3 (r-gal3) under hypoxic conditions (H; 1% O2). Cell migration was assessed by scratch assay. The results from each assay are summarized in the accompanying histograms. *P<0.05; **P<0.01; N.S., not significant. Wt, wild-type; N, normoxic condition (21% O2); H, hypoxic condition (2% O2); NSCLC, non-small cell lung cancer.