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• W2804508967 abstract "Nogo-B receptor (NgBR) plays fundamental roles in regulating angiogenesis, vascular development, and the epithelial-mesenchymal transition (EMT) of cancer cells. However, the therapeutic effect of NgBR blockade on tumor vasculature and malignancy is unknown, investigations on which requires an adequate delivery system for small interfering RNA against NgBR (NgBR siRNA). Here a surface charge switchable polymeric nanoparticle that was sensitive to the slightly acidic tumor microenvironment was developed for steady delivery of NgBR siRNA to tumor tissues. The nanoformulation was constructed by conjugating 2, 3-dimethylmaleic anhydride (DMMA) molecules to the surface amines of micelles formed by cationic co-polymer poly(lactic-co-glycolic acid)2-poly(ethylenimine) and subsequent absorption of NgBR siRNAs. The nanoparticles remained negatively charged in physiological condition and smartly converted to positive surface charge due to tumor-acidity-activated shedding of DMMA. The charge conversion facilitated cellular uptake of siRNAs and in turn efficiently depleted the expression of NgBR in tumor-bearing tissues. Silencing of NgBR suppressed endothelial cell migration and tubule formation, and reverted the EMT process of breast cancer cells. Delivery of the nanoformulation to mice bearing orthotopic breast carcinoma showed no effect on tumor growth, but led to remarkable decrease of distant metastasis by normalizing tumor vessels and suppressing the EMT of breast cancer cells. This study demonstrated that NgBR is a promising therapeutic target in abnormal tumor vasculature and aggressive cancer cells, and the tumor-responsive nanoparticle with the feature of charge transformation offers great potential for tumor-specific delivery of gene therapeutics." @default.
• W2804508967 created "2018-06-01" @default.
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• W2804508967 date "2018-08-01" @default.
• W2804508967 modified "2023-10-15" @default.
• W2804508967 title "Delivery of small interfering RNA against Nogo-B receptor via tumor-acidity responsive nanoparticles for tumor vessel normalization and metastasis suppression" @default.
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• W2804508967 doi "https://doi.org/10.1016/j.biomaterials.2018.05.034" @default.
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• W2804508967 hasPublicationYear "2018" @default.
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