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This work proposes the concept of single‐cell microRNA (miR) therapy and proof‐of‐concept by engineering a nanopipette for high‐precision miR‐21‐targeted therapy in a single HeLa cell with sensitive photoelectrochemical (PEC) feedback. Targeting the representative oncogenic miR‐21, the as‐functionalized nanopipette permits direct intracellular drug administration with precisely controllable dosages,...
Starvation therapy kills tumor cells via consuming glucose to cut off their energy supply. However, since glucose oxidase (GOx)‐mediated glycolysis is oxygen‐dependent, the cascade reaction based on GOx faces the challenge of a hypoxic tumor microenvironment. By decomposition of glycolysis production of H2O2 into O2, starvation therapy can be enhanced, but chemodynamic therapy is limited. Here, a...
Though significant advances are made in the arena of single‐cell electroanalysis, quantification of intracellular amino acids of human cells remains unsolved. Exemplified by l‐histidine (l‐His), this issue is addressed by a practical electrochemical nanotool synergizing the highly accessible nanopipette with commercially available synthetic DNAzyme. The fabricated nanotools are screened before operation...
Delivering and releasing anticancer agents directly to their subcellular targets of action in a controlled manner are almost the ultimate goal of pharmacology, but it is challenging. In recent decades, plenty of efforts have been made to send drugs to tumor tissue or even specifically to cancer cells; however, at the subcellular scale, cancer cells have multiple cunning ways to hinder drugs from reaching...
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