Self-Targeted, Shape-Assisted, and Controlled-Release Self-Delivery Nanodrug for Synergistic Targeting/Anticancer Effect of Cytoplasm and Nucleus of Cancer Cells

We constructed 10-hydroxycamptothecin (CPT) "nanodrugs" with functionalization of lipid-PEG-methotrexate (MTX) to prepare high-drug-loaded, and sustained/controlled-release MTX-PEG-CPT nanorods (NRs), in which MTX drug itself can serve as a specific "targeting ligand". The self-targeted nanodrug can codeliver both CPT and MTX drugs with distinct anticancer mechanisms. Furthermore, MTX-PEG-CPT NRs significantly reduced burst release, improved blood circulation and tumor accumulation, enhanced cellular uptake, and synergistically increased anticancer effect against tumor cells compared with MTX-PEG-CPT nanospheres (NSs) and either both free drugs or individual free drug. Therefore, the synergistic targeting/therapeuticy nano-multi-drug codelivery assisted by shape design may advantageously offer a promising new strategy for nanomedicine.