Gold nanoshell nanomicelles for potential magnetic resonance imaging, light-triggered drug release, and photothermal therapy

Yan Ma, Xiaolong Liang, Sheng Tong, Gang Bao, Qiushi Ren, Zhifei Dai

Research output: Contribution to journalArticlepeer-review

244 Scopus citations

Abstract

A novel multifunctional drug-delivery platform is developed based on cholesteryl succinyl silane (CSS) nanomicelles loaded with doxorubicin, Fe 3O4 magnetic nanoparticles, and gold nanoshells (CDF-Au-shell nanomicelles) to combine magnetic resonance (MR) imaging, magnetic-targeted drug delivery, light-triggered drug release, and photothermal therapy. The nanomicelles show improved drug-encapsulation efficiency and loading level, and a good response to magnetic fields, even after the formation of the gold nanoshell. An enhancement for T2-weighted MR imaging is observed for the CDF-Au-shell nanomicelles. These nanomicelles display surface plasmon absorbance in the near-infrared (NIR) region, thus exhibiting an NIR (808 nm)-induced temperature elevation and an NIR light-triggered and stepwise release behavior of doxorubicin due to the unique characteristics of the CSS nanomicelles. Photothermal cytotoxicity in vitro confirms that the CDF-Au-shell nanomicelles cause cell death through photothermal effects only under NIR laser irradiation. Cancer cells incubated with CDF-Au-shell nanomicelles show a significant decrease in cell viability only in the presence of both NIR irradiation and a magnetic field, which is attributed to the synergetic effects of the magnetic-field-guided drug delivery and the photothermal therapy. Therefore, such multicomponent nanomicelles can be developed as a smart and promising nanosystem that integrates multiple capabilities for effective cancer diagnosis and therapy.

Original languageEnglish
Pages (from-to)815-822
Number of pages8
JournalAdvanced Functional Materials
Volume23
Issue number7
DOIs
StatePublished - Feb 18 2013

Keywords

  • combined therapy
  • gold nanoshells
  • nanomicelles
  • photothermal effect
  • triggered release

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Condensed Matter Physics
  • General Materials Science
  • Electrochemistry
  • Biomaterials

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