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• W2617366953 abstract "Glioblastoma (GBM), one of the most lethal cancers, remains as a hard task to handle. The major hurdle of nanostructured therapeutic agents comes from the limited retention at the GBM site and poor selectivity. In this study, we reported dual-functional gold nanoparticles (AuNPs) to figure out the biological barrier and improve their accumulation in GBM. The nanoparticles, AuNP-A&C-R, were composed of two functional particles: one was Ala-Ala-Asn-Cys-Asp (AK) and R8-RGD-comodified AuNPs (AuNP-AK-R) and the other was 2-cyano-6-amino-benzothiazole and R8-RGD-comodified AuNPs (AuNP-CABT-R). AuNP-A&C-R could aggregate in the presence of legumain, resulting in a size increase from 41.4 ± 0.6 to 172.9 ± 10.2 nm after 8 h incubation. After entering the circulatory system, AuNP-A&C-R actively targeted the integrin αvβ3 receptor on blood-brain barrier (BBB), mediated transcytosis of particles across BBB, and then targeted the receptor on the GBM cells. Once AuNP-A&C-R entered into GBM, they formed further aggregates with increased size extracellularly or intracellularly because of the overexpressed legumain, which in turn blocked their backflow to the bloodstream or limited their exocytosis by cells. In vivo optical imaging demonstrated that AuNP-A&C-R were efficiently delivered to the GBM site and retained with high selectivity. We further confirmed that AuNP-A&C-R acquired a higher accumulation at the GBM site than AuNP-A&C and AuNP-R because of the synergistic effect. More importantly, the doxorubicin (DOX)-loaded AuNP-A&C-R showed an improved chemotherapeutic effect to C6 GBM-bearing mice, which significantly prolonged the median survival time by 1.22-fold and 1.27-fold compared with the DOX-loaded AuNP-A&C and the DOX-loaded AuNP-R, respectively. These results suggested that the dual-functional nanoplatform is promising for the GBM treatment." @default.
• W2617366953 created "2017-06-05" @default.
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• W2617366953 date "2017-06-07" @default.
• W2617366953 modified "2023-10-15" @default.
• W2617366953 title "Ligand-Mediated and Enzyme-Directed Precise Targeting and Retention for the Enhanced Treatment of Glioblastoma" @default.
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• W2617366953 doi "https://doi.org/10.1021/acsami.7b02303" @default.
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