Abstract
Drug resistance is a main obstacle for the successful cancer therapy. Emerging evidence suggests that miR-200c functions as an effective cancer stem cells (CSCs) inhibitor and restores sensitivity to microtubule-targeting drugs. In the present work, we engineered the intelligent gelatinases-stimuli nanoparticles (NPs) to co-delivery miR-200c and antitumor drug docetaxel (DOC) to verify their synergetic effects on inhibition of CSCs and cancer cells. After tumor cells were treated with miR-200c NPs, miR-200c and its targeted gene class III beta-tubulin (TUBB3) expression were evaluated. The effects of (miR-200c + DOC) NPs on DOC-resistant lung cancer cells viability as well as the expression of E-cadherin and CD44 were studied. We found that the (miR-200c + DOC) NPs significantly overcome DOC resistance, possibly by elevated miR-200c expression,low TUBB3 level, and reversed the EMT through upregulation E-cadherin and inhibition lung CSCs. The (miR-200c + DOC) NPs may provide a new modality for co-delivery of nucleic acid and drugs to inhibit CSCs and reverse drug resistance.
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