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• W2508113706 abstract "In this paper, a smart nanocarrier (MSNs-SS-CDPAA) is developed for redox-responsive controlled drug delivery and in vivo bioimaging by grafting fluorescent carbon dots to the surface of mesoporous silica nanoparticles (MSNs) via disulfide bonds. The polyanion polymer poly(acrylic acid) (PAA) was used to prepare the carboxyl-abundant carbon dots (CDPAA) by hydrothermal polymerization. The negatively charged CDPAA were anchored to the openings of MSNs containing the disulfide bonds through amidation and were used as gatekeepers for trapping the drugs within the pores. The in vitro release results indicated that the prepared MSNs-SS-CDPAA/DOX showed highly redox-responsive drug release in pH 7.4 and pH 5.0 PBS. In addition, the redox-responsive release mechanism was studied by measurement of the Zeta potential and fluorescence spectrophotometry. The prepared MSNs-SS-CDPAA exhibited excellent biocompatibility and fluorescence properties. Confocal laser scanning microscopy (CLSM) showed that MSNs-SS-CDPAA could emit blue, green and red fluorescence at an excitation wavelength of 408, 488 and 561nm, respectively. In addition, MSNs-SS-CDPAA/DOX exhibited a high cellular uptake as shown by CDPAA imaging and a therapeutic effect on cancer cells by MTT assay. This study describes a novel strategy for simultaneously controlled drug delivery and real-time imaging to track the behavior of nanoparticles during tumor therapy." @default.
• W2508113706 created "2016-09-16" @default.
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• W2508113706 date "2016-12-01" @default.
• W2508113706 modified "2023-10-13" @default.
• W2508113706 title "Fluorescent carbon dot modified mesoporous silica nanocarriers for redox-responsive controlled drug delivery and bioimaging" @default.
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• W2508113706 doi "https://doi.org/10.1016/j.jcis.2016.08.033" @default.
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