In this study, novel peptide-targeted delivery systems were developed for systemic and targeted delivery of therapeutic siRNA based on a multifunctional carrier, (1-aminoethyl)iminobis[N-(oleicylcysteinylhistinyl-1-aminoethyl)propionamide] (EHCO), which showed pH-sensitive amphiphilic cell membrane disruption. EHCO formed stable nanoparticles with siRNA. Targeted siRNA delivery systems were rea...