A facile strategy to construct dual-drug delivery nanoparticles (TL-CPT NPs), which possessed higher loading content of CPT and TPP-LND. Notably, TL-CPT NPs showed promising ultrarapid pH/GSH response to release more than 86% of loaded TPP-LND or 93% of loaded CPT in just 2 h. The results showed that the nanoparticles hierarchically delivered CPT and TPP-LND to targeted different organelles without mutual influence benefiting the ultrarapid pH/GSH response to drug release, and further significantly and synergistically induced cell apoptosis and improved chemotherapeutic efficiency in cancer cells.
Keywords: cell apoptosis; combination therapy; drug delivery; hierarchical targeting; ultrarapid pH/GSH response.