Dual functional AuNRs at MnMEIOs nanoclusters for magnetic resonance imaging and photothermal therapy

Yao Chen Chuang, Chia Jung Lin, Shih Feng Lo, Jei Lin Wang, Shey-Cherng Tzou, Shyng Shiou Yuan, Yun-Ming Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A novel dual functional theranosis platform is developed based on manganese magnetism-engineered iron oxide (MnMEIO) and gold nanorods (AuNRs) to combine magnetic resonance (MR) imaging and photothermal therapy in one nanocluster. The platform showed improved T 2 -weighted MR imaging and exhibited a near-infrared (NIR) induced temperature elevation due to the unique characteristics of AuNRs at MnMEIOs nanoclusters. The obtained dual functional spherical-shaped nanoclusters showed low cytotoxicity, and high cellular uptake efficiency. The AuNRs at MnMEIOs nanoclusters also demonstrated a 1.9 and 2.2 folds r 2 relaxivity value higher than those of monodispersed MnMEIO and Resovist. In addition, invivo MR imaging study found that the contrast enhancements were - 70.4±4.3% versus - 7.5±3.0% in Her-2/neu overexpression tumors as compared to the control tumors. More importantly, NIR laser irradiation to the tumor site resulted in outstanding photothermal therapeutic efficacy and without damage to the surrounding tissue. In additional, the prepared dual functional AuNRs at MnMEIOs display high stability and furthermore disperse even in the presence of external magnet, showing that AuNRs at MnMEIOs nanoclusters can be manipulated by an external magnetic field. Therefore, such nanoclusters combined MR imaging and photothermal therapeutic functionality can be developed as a promising nanosystem for effective cancer diagnosis and therapy.

Original languageEnglish
Pages (from-to)4678-4687
Number of pages10
JournalBiomaterials
Volume35
Issue number16
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Gold nanorods
  • Manganese-doped iron oxide
  • MR imaging
  • Photothermal
  • Theranosis

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