Fig. 6
Programmed combination therapy at cell level. a Scheme of programmed combination therapy. b Methyl thiazolyl tetrazolium (MTT) assays of YSUCNP-PdPc@DPPC-DOX-labeled MIA PaCa-2 cells. Cells were treated with no laser irradiation (N), 730 nm laser irradiation at 46 mW cm−2 (L), 140 mW cm−2 (H), and their combinations with different sequences (L→L, H→H, L→H and H→L). Each condition in MTT study is tested 3 times and the average value is given. Error bars were defined as s.d. (n = 3)
