Supramolecular Translation of Enzymatically Triggered Disassembly of Micelles into Tunable Fluorescent Responses

Marina Buzhor, Assaf J. Harnoy, Einat Tirosh, Ayana Barak, Tal Schwartz, Roey J. Amir*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The need for advanced fluorescent imaging and delivery platforms has motivated the development of smart probes that change their fluorescence in response to external stimuli. Here a new molecular design of fluorescently labeled PEG-dendron hybrids that self-assemble into enzyme-responsive micelles with tunable fluorescent responses is reported. In the assembled state, the fluorescence of the dyes is quenched or shifted due to intermolecular interactions. Upon enzymatic cleavage of the hydrophobic end-groups, the labeled polymeric hybrids become hydrophilic, and the micelles disassemble. This supramolecular change is translated into a spectral response as the dye-dye interactions are eliminated and the intrinsic fluorescence is regained. We demonstrate the utilization of this molecular design to generate both Turn-On and spectral shift responses by adjusting the type of the labeling dye. This approach enables transformation of non-responsive labeling dyes into smart fluorescent probes. Fluorescent micelles: A modular design enables synthesis of fluorescently labeled amphiphilic enzyme-responsive PEG-dendron hybrids that self-assemble into micelles with altered spectral properties. Enzymatic activation of the micelles results in their disassembly and supramolecular translation of the structural changes into tailor-made responses: turn-on or spectral shift of the fluorescence of the labeling dyes.

Original languageEnglish
Pages (from-to)15633-15638
Number of pages6
JournalChemistry - A European Journal
Volume21
Issue number44
DOIs
StatePublished - 1 Oct 2015

Funding

FundersFunder number
Israel Science Foundation2221/14, 966/14

    Keywords

    • enzymes
    • fluorescence
    • micelles
    • nanocarriers
    • stimuli-responsive polymers

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