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Comparative effect of wrapping solid gold nanoparticles and hollow gold nanoparticles with doxorubicin-loaded thermosensitive liposomes for cancer thermo-chemotherapy

Abstract

Since conventional chemotherapy is a systemic treatment that affects the body globally and will not concentrate inside the tumor, it causes adverse side effects to the patients. In this study, doxorubicin(DOX) together with solid gold nanoparticles(GNPs) or hollow gold nanoparticles(HGNPs) respectively loaded inside thermosensitive liposomes(GNPs&DOX-TLs, HGNPs&DOX-TLs), where the GNPs and HGNPs act as a “nanoswitch” for killing tumor cells directly by hyperthermia and triggering DOX release from TL in tumor quickly by near infrared laser(NIR) illumination. In addition, this study investigated the photothermal transformation ability, NIR triggered drug release behavior, and the intracellular uptake and cytotoxicity of breast tumor cells and the thermo-chemotherapy mediated by co-delivery of GNPs&DOX-TLs and HGNPs&DOX-TLs. GNPs and HGNPs had very different light-to-heat transduction efficiencies, while the hollow HGNPs had the advantage of NIR surface plasmon tunability , resulting in photothermal ablation of tumors with 800nm light penetration in tissue. The prepared HGNPs&DOX-TLs exhibited spherical shape with the diameter of 190nm and  potential of -29mV, which was steadily dispersed for at least one month. The co-encapsulated DOX was released under hyperthermia caused by NIR-responsive HGNPs and local drug concentration increased along with the disintegration of liposomal membrane. This co-delivery of HGNPs&DOX-TLs produced a synergistic cytotoxicity response, thereby enhancing anticancer efficacy 8-fold and increasing the survival time compared to GNPs&DOX-TLs. This work suggested that the co-delivery of HGNPs&DOX-TLs followed by burst-release DOX using NIR-responsive HGNPs sensitized cancer cells to chemotherapeutic compound, which provided a novel concept for the combination strategy of chemotherapy and photothermal therapy. These results suggest that the markedly improved therapeutic efficacy and decreased systemic toxicity of the NPs presented in this study hold significant potential for future cancer treatment.

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Supplementary files

Publication details

The article was received on 06 Dec 2017, accepted on 10 Mar 2018 and first published on 03 Apr 2018


Article type: Paper
DOI: 10.1039/C7NR09083H
Citation: Nanoscale, 2018, Accepted Manuscript
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    Comparative effect of wrapping solid gold nanoparticles and hollow gold nanoparticles with doxorubicin-loaded thermosensitive liposomes for cancer thermo-chemotherapy

    Y. Li, D. He, J. Tu, R. Wang, C. Zu, Y. Chen, W. Yang, D. Shi, T. J. Webster and Y. Shen, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR09083H

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