Enhanced effect of targeted liposome-encapsulated treatment combination in an hCRC large tumor model. The drug internalization (A) and cytotoxicity (B) of pHCT74-Lipo-IRI were compared with non-targeted Lipo-IRI in vitro. The tumor bearing mice (500 mm3) received PBS, IRI + Dox, Lipo-Dox + Lipo-IRI, pHCT74-Lipo-IRI + pHCT74-Lipo-Dox 10 times over the course of 5 weeks (twice weekly × 5). The tumor volume and body weight are shown (C and D). A Kaplan-Meier curve and median survival of each group are shown (E). The data were analyzed by GraphPad Prism 6.0 software (n = 7). * p < 0.05, ** p < 0.01, *** p < 0.001 and **** p < 0.0001.