Polyamine transport system-targeted nanometric micelles assembled from epipodophyllotoxin-amphiphiles.

Micelle-forming amphiphilic drug conjugates were synthesized starting from a biologically active epipodophyllotoxin derivative which was covalently inserted in between a hydrophilic targeting spermine unit, and a hydrophobic stearyl chain. The amphiphilic drug conjugates were further assembled into the corresponding micelles and evaluated in vitro for the active targeting of tumor cells overexpressing the polyamine transport system.