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Migration (a) and invasion (b) of T24 treated with PBS, blank vector, negative siRNA, expression vector containing the full-length cDNA for LEF1 and siRNA targeting LEF1, followed by PPARγ agonist Rosiglitazone (20 μM) or PPARγ antagonist GW9662 (20 μM) normalized by control. Experiments were repeated for three times. *p < 0.05; **p < 0.01
