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To date, the combinational cancer therapy of anticancer and antiangiogenic agents represents a promising strategy to improve antitumor outcomes in clinics. However, combination therapy with drugs having distinct properties, such as solubility, limits the likelihood of simultaneous delivery. In our study, we aimed to develop a codelivery nanoparticulate system of hydrophilic doxorubicin (DOX) and hydrophobic itraconazole (ITZ) using liposomes coated with Pluronic® P123 (ITZ/DOX-PLip). The prepared ITZ/DOX-PLip exhibited a unimodal size distribution and high loading efficiency with sustained release profiles. Furthermore, cytotoxicity against 4T1 murine breast cancer cells and cellular uptake results revealed that the inhibitory effect of ITZ/DOX-Plip on tumor growth was superior to that of free DOX or DOX-loaded liposome (DOX-Lip), which was primarily attributed to the significantly higher intercellular DOX content. Cytotoxicity against HUVEC and wound healing tests confirmed that ITZ and ITZ formulations could inhibit the growth and migration of endothelial cells. In addition, in xenograft 4T1 bearing BALB/c mice, biodistribution experiments revealed that higher drug accumulation in tumors and decreased distribution in heart were observed for ITZ/DOX-PLip as compared to free DOX. Remarkably, ITZ/DOX-PLip significantly reduced tumor volume, tumor weight, liver metastasis and microvessel density in comparison with the same dose of ITZ injection or DOX-Lip. Overall, this Pluronic® P123 modified liposome-based codelivery system represents a promising nano-platform for combination therapy in cancers.

Co-delivery of doxorubicin and itraconazole by Pluronic® P123 coated liposomes to enhance the anticancer effect in breast cancers