Disulfide-cross-linked PEG-poly(amino acid)s copolymer micelles for glutathione-mediated intracellular drug delivery

We report biocompatible, cell-permeable core–shell–corona polymer micelles bearing glutathione-cleavable shell cross-links, which allow the facilitated release of entrapped anticancer drugs at cytoplasm in response to an intracellular glutathione level.