Gold-doxorubicin nanoconjugates for overcoming multidrug resistance

Yan Juan Gu, Jinping Cheng, Cornelia Wing Yin Man, Wing Tak Wong, Shuk Han Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

153 Citations (Scopus)


Multidrug resistance (MDR) is a major clinical obstacle to the success of cancer chemotherapy. Here we developed a gold-doxorubicin (DOX) nanoconjugates system to overcome MDR. Gold nanoparticles (AuNPs) were first PEGylated as Au-PEG-NH2, and DOX was then grafted onto AuNPs via a cleavable disulfide linkage (Au-PEG-SS-DOX). Confocal images revealed that the extent of intracellular uptake of Au-PEG-SS-DOX was greater than that of free DOX in the MDR cells, and inductively coupled plasma mass spectroscopy analysis further confirmed that AuNPs significantly increased the level of drug accumulation in MDR cells at a nanoparticles dose greater than 15 μM. The cytotoxicity study demonstrated that the Au-PEG-SS-DOX nanoconjugates system efficiently released the anticancer drug DOX and enhanced its cytotoxicity against MDR cancer cells. This study highlights the potential of using AuNPs for overcoming of MDR in cancer chemotherapy. From the Clinical Editor: This study demonstrates that gold nanoparticles can be successfully applied to overcome MDR in cancer chemotherapy.
Original languageEnglish
Pages (from-to)204-211
Number of pages8
JournalNanomedicine: Nanotechnology, Biology, and Medicine
Issue number2
Publication statusPublished - 1 Feb 2012


  • Chemotherapy
  • Doxorubicin
  • Gold nanoparticles
  • Multidrug resistance

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Molecular Medicine
  • Biomedical Engineering
  • General Materials Science
  • Pharmaceutical Science


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