Mechano‐Nanoswitches for Ultrasound‐Controlled Drug Activation

Current pharmacotherapy is challenged by side effects and drug resistance issues due to the lack of drug selectivity. Mechanochemistry‐based strategies provide new avenues to overcome the related problems by improving drug selectivity. It is recently shown that sonomechanical bond scission enables the remote‐controlled drug release from their inactive parent macromolecules using ultrasound (US). To further expand the scope of the US‐controlled drug activation strategy, herein a mechano‐responsive nanoswitch for the selective activation of doxorubicin (DOX) to inhibit cancer cell proliferation is constructed. As a proof‐of‐concept, the synthesis, characterization, and US‐responsive drug activation evaluation of the mechano‐nanoswitch, which provides a blueprint for tailoring nanosystems for force‐induced pharmacotherapy is presented.