Curcumin Synergistically Enhances the Cytotoxicity of Arsenic Trioxide in U266 Cells by Increasing Arsenic Uptake

Table 2

Combinatorial effects of ATO and curcumin.

ATO (μmol/L)	Cur (μmol/L)	Combinatorial effect	CI
1.0	5.0	0.191	0.810
1.0	10.0	0.367	0.684
1.0	20.0	0.701	0.496
2.5	5.0	0.376	0.695
2.5	10.0	0.558	0.562
2.5	20.0	0.762	0.479
5.0	5.0	0.514	0.746
5.0	10.0	0.699	0.521
5.0	20.0	0.802	0.508