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A micellar cisplatin prodrug simultaneously eliminates both cancer cells and cancer stem cells in lung cancer.
Biomaterials Science 2017 July 26
Platinum-based chemotherapy as first-line treatment for lung cancers encounters insufficient selectivity, severe side effects and drug resistance in clinics. In this study, we developed an amphiphilic prodrug of cisplatin-poly(ethylene glycol)-block-polycaprolactone and demonstrated that the prodrug formed micellar nanoparticles, NPPt(IV) , with an average diameter of ∼100 nm. NPPt(IV) released platinum in response to the intracellular acidic and reductive environment, and in turn induced significant anti-proliferative activity in lung cancer cells. More importantly, NPPt(IV) exhibited a prominent inhibitory effect on CD133+ lung cancer stem cells (CSCs) and suppressed tumor growth in vivo. Unlike cisplatin treatment which eventually enriches CSCs, NPPt(IV) treatment prevents the accumulation of CD133+ lung CSCs in tumors. Therefore, NPPt(IV) simutaneously targeting CSCs and non-CSCs might represent a superior strategy to improve conventional anticancer therapy directed predominantly to tumor bulk populations.
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