Figs. 3 and 4

The effects of ketamine (a), s-ketamine (b), and MK 801 (c) on apoptosis in PaTu8988t (Figs. 3) and Panc-1 (Figs. 4) pancreatic carcinoma cell lines in vitro. For apoptosis analysis, cancer cells were stained with Annexin V. (*) indicate statistical significance at p < 0.05 compared to untreated control