Cell viability in spheroids after 4 h treatment with NCL-240-micelles (a). With a 25 μM dose of NCL-240 in Tf-targeted (0.67 or 1.34 mol%) micelles, significant cytotoxicity occurred compared to a 50 μM dose of untargeted micellar NCL-240 (a). Cell viability in spheroids after 2 h treatment with NCL-240-liposomes (b). A 25 μM dose of NCL-240 in 2.0 mol% Tf-targeted in liposomes significantly increased cytotoxicity compared to untargeted NCL-240 liposomes. (n=3, Mean ± S.D., * p≤0.05, ** p≤0.01, *** p≤0.001)