CdSe@ZnS/ZnS quantum dots loaded in polymeric micelles as a pH-triggerable targeting fluorescence imaging probe for detecting cerebral ischemic area

Hong Yu Yang, Yan Fu, Moon-Sun Jang, Yi Li, Wen Ping Yin, Tae Kyu Ahn, Jung Hee Lee, Heeyeop Chae, Doo Sung Lee

Research output: Contribution to journalArticleResearchpeer-review

15 Citations (Scopus)

Abstract

High photoluminescence (PL) quantum yield (QY), photostability CdSe@ZnS/ZnS core/multishell quantum dots (CM-QDs) were first applied for bioimaging. The solubility, stability and biocompatible of the fluorescence imaging probes were constructed by self-assembly of CM-QDs and pH-responsive methoxy poly(ethylene glycol)-poly(β-amino ester/amidoamine)-dodecylamine (mPEG-PAEA-DDA) multiblock copolymers. The resulting CM-QDs-loaded mPEG-PAEA-DDA micelles (CM-QDs-PEG-PAEA-DDA) exhibited lower cell cytotoxicity and higher fluorescence intensity than the core/shell CdSe@ZnS QDs-encapsulated mPEG-PAEA-DDA micelles (CS-QDs-PEG-PAEA-DDA). Moreover, the in vivo fluorescence imaging ability confirmed that the CM-QDs-PEG-PAEA-DDA can be employed as a pH-triggerable targeting imaging probe for detection of a rat bearing cerebral ischemia disease. Therefore, we believed that the CM-QDs-PEG-PAEA-DDA may be the next generation of fluorescence imaging probes for targeted diagnosis acidic pathological areas, using pH as a stimulus.

Original languageEnglish
Pages (from-to)497-506
Number of pages10
JournalColloids and Surfaces B: Biointerfaces
Volume155
DOIs
Publication statusPublished - 1 Jul 2017
Externally publishedYes

Keywords

  • Cerebral ischemic areas
  • Core/multishell quantum dots
  • Fluorescence imaging probe
  • pH-responsive
  • pH-triggerable targeting
  • Polymeric micelle

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