Recently, methods for delivery of peptide and RNA to target cells are widely studied for cell research and drug delivery strategies. However, the delivery methods sometimes have problems such as cytotoxicity and ineffective delivery. In some methods, target molecules tend to be trapped in endosome and degraded by lysosome when introduced to cells. In this study, ultrasound-dependent peptide / nanoparticle delivery method was developed. We developed a molecular conjugate of a cell-penetrating peptide, a sonosensitizer and a functional peptide / nanoparticle. This molecule was trapped in endosome when cells were incubated with the molecule. However, we succeeded in cytoplasmic delivery of the molecule that escape from endosome by ultrasound irradiation.
