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Effects of cisplatin (CP) and papaverine (PV) on the viability of liver cancer HepG2 and normal kidney Vero cells as measured by the MTT assay (A) IC50 of CP and PV on HepG2 (B) IC50 of CP and PV on Vero. (C) Effect of combination of PV (10 µg/mL) with CP IC50 on HepG2 and Vero viability in comparison to cells treated with CP only. Data are expressed as mean ± SEM, n = 3. **** p < 0.0001.
