Development of pH-sensitive size reducible nanoparticles for cell nucleus target delivery in multidrug-resistant breast cancer

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In FY2022, I planned to develop and optimize the polymer characteristic. I modified D-α-Tocopherol polyethylene glycol 1000 succinate (TPGS) with EGF receptor-targeted peptide and evaluated the conjugation. I successfully prepared the TPGS-EGF polymer and formulated drug-loaded micelles. We confirm the micelles' characteristics are suitable to move next step.To deliver the micelles directly into the nucleus, we capped the micelles using a 150 nm size liposome. As a result, about ten micelles are captured in the liposome, and the drug loading efficacy was increased up to 4 times that of the micelles. The liposome included pH-sensitive moieties, and the release profile started to confirm.