Effects of ursodeoxycholic acid (UDCA) on the mRNA (A) and protein (B) expression of XIAP, cIAP-1, cIAP-2 and survivin in human oral squamous carcinoma HSC-3 cells. Fold-ratio: gene expression/GAPDH (β-actin) × control numerical value (control fold ratio: 1); (C), XIAP mRNA expression folds of control; (D), cIAP-1 mRNA expression folds of control; (E), cIAP-2 mRNA expression folds of control; (F), survivin mRNA expression folds of control; (G), XIAP protein expression folds of control; (H), cIAP-1 protein expression folds of control; (I), cIAP-2 protein expression folds of control; and (J), survivin protein expression folds of control. * Mean values are significantly different from control (p < 0.05) and ** mean values are significantly different from control (p < 0.01).