Caspase-3 content in SNU-1 cells.
Increase in intracellular Caspase-3 compared to blank (untreated) SNU-1 cells upon treatment with 50–5000 nm sized aminated, carboxylated and NF particles for 4 h. Data compared with respect to surface functionalization (A) or particle size (B). All data represented as mean ± S.D. (n = 4). No significant difference between the groups is denoted as ns.