alexa Redox potential ultrasensitive nanoparticle for the targeted delivery of camptothecin to HER2-positive cancer cells.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular and Genetic Medicine

Author(s): Remant BK, Chandrashekaran V, Cheng B, Chen H, Pea MM,

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Abstract Ideal "smart" nanoparticles for drug delivery should enhance therapeutic efficacy without introducing side effects. To achieve that, we developed a drug delivery system (HCN) based on a polymer-drug conjugate of poly[2-(pyridin-2-yldisulfanyl)]-graft-poly(ethylene glycol) and camptothecin with an intracellularly cleavable linker and human epidermal growth factor receptor 2 (HER2) targeting ligands. An in vitro drug release study found that HCN was stable in the physiological environment and supersensitive to the stimulus of elevated intracellular redox potential, releasing all payloads in less than 30 min. Furthermore, confocal microscopy revealed that HCN could specifically enter HER2-positive cancer cells. As a consequence, HCN could effectively kill HER2-positive cancer cells while not affecting HER2-negative cells.
This article was published in Mol Pharm and referenced in Journal of Molecular and Genetic Medicine

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