Pillar[5]arene-based, dual pH and enzyme responsive supramolecular vesicles for targeted antibiotic delivery against intracellular MRSA.

A rationally designed mannosylated amphiphilic pillar[5]arene (Man@AP5) self-assembles into supramolecular vesicles with encapsulated vancomycin (Man@AP5-Van), which target macrophages, respond to both acid and cathepsin B, and release vancomycin (Van) rapidly inside macrophages. Man@AP5-Van significantly increases the intracellular concentration of Van, enhancing its antibacterial efficacy against intracellular MRSA.