Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/93948
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dc.contributor.authorChen, Hsin-Hungzh_TW
dc.contributor.authorHuang, Wen-Chiazh_TW
dc.contributor.authorChiang, Wen-Hsuanzh_TW
dc.contributor.authorLiu, Te-Izh_TW
dc.contributor.authorShen, Ming-Yinzh_TW
dc.contributor.authorHsu, Yuan-Hungzh_TW
dc.contributor.authorLin, Sung-Chyrzh_TW
dc.contributor.authorChiu, Hsin-Chengzh_TW
dc.date2015-
dc.date.accessioned2016-07-26T03:54:21Z-
dc.date.available2016-07-26T03:54:21Z-
dc.identifier.urihttp://hdl.handle.net/11455/93948-
dc.description.abstractIn this study, a novel pH-responsive cholesterol-PEG adduct-coated solid lipid nanoparticles (C-PEG-SLNs) carrying doxorubicin (DOX) capable of overcoming multidrug resistance (MDR) breast cancer cells is presented. The DOX-loaded SLNs have a mean hydrodynamic diameter of ~100 nm and a low polydispersity index (under 0.20) with a high drug-loading efficiency ranging from 80.8% to 90.6%. The in vitro drug release profiles show that the DOX-loaded SLNs exhibit a pH-controlled drug release behavior with the maximum and minimum unloading percentages of 63.4% at pH 4.7 and 25.2% at pH 7.4, respectively. The DOX-loaded C-PEG-SLNs displayed a superior ability in inhibiting the proliferation of MCF-7/MDR cells. At a DOX concentration of 80 μM, the cell viabilities treated with C-PEG-SLNs were approximately one-third of the group treated with free DOX. The inhibition activity of C-PEG-SLNs could be attributed to the transport of C-PEG to cell membrane, leading to the change of the composition of the cell membrane and thus the inhibition of permeability glycoprotein activity. This hypothesis is supported by the confocal images showing the accumulation of DOX in the nuclei of cancer cells and the localization of C-PEG on the cell membranes. The results of in vivo study further demonstrated that the DOX delivered by the SLNs accumulates predominantly in tumor via enhanced permeability and retention effect, the enhanced passive tumor accumulation due to the loose intercellular junctions of endothelial cells lining inside blood vessels at tumor site, and the lack of lymphatic drainage. The growth of MCF-7/MDR xenografted tumor on Balb/c nude mice was inhibited to ~400 mm(3) in volume as compared with the free DOX treatment group, 1,140 mm(3), and the group treated with 1,2 distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)] solid lipid nanoparticles, 820 mm(3). Analysis of the body weight of nude mice and the histology of organs and tumor after the administration of DOX-loaded SLNs show that the SLNs have no observable side effects. These results indicate that the C-PEG-SLN is a promising platform for the delivery of therapeutic agents for MDR cancer chemotherapy.zh_TW
dc.language.isoenzh_TW
dc.relationInternational journal of nanomedicine, Volume 10, Page(s) 5035-48.zh_TW
dc.subjectmultidrug resistancezh_TW
dc.subjectpH-responsivezh_TW
dc.subjectpermeability glycoproteinzh_TW
dc.subjectsolid lipid nanoparticleszh_TW
dc.titlepH-Responsive therapeutic solid lipid nanoparticles for reducing P-glycoprotein-mediated drug efflux of multidrug resistant cancer cellszh_TW
dc.typeJournal Articlezh_TW
dc.identifier.doi10.2147/IJN.S86053zh_TW
item.grantfulltextnone-
item.openairetypeJournal Article-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextno fulltext-
Appears in Collections:化學工程學系所
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