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Issue 44, 2017
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Vancomycin-conjugated polythiophene for the detection and imaging of Gram-positive bacteria

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Abstract

Bacterial infections can cause serious health problems. The rapid identification of bacteria plays a vital role in the treatment of bacterial infection at an early stage of the disease. In this work, an active polythiophene derivative containing reactive pentafluorophenyl (PFP) ester pendant groups was prepared via Fe3+-catalyzed oxidative polymerization. As far as we know, this is the first report of active polythiophene with reactive PFP ester moieties. The active polythiophene derivative was conjugated with vancomycin and α-methoxy-ω-amino poly(ethylene glycol) (mPEG-NH2) via a reactive ester–amine reaction, resulting in the formation of water-soluble and fluorescent vancomycin-containing polythiophene (PTPVan). Since vancomycin can selectively interact with Gram-positive bacteria and kill them, the antibacterial properties of PTPVan were evaluated. The detection of Gram-positive bacteria was carried out by observing the color change and the fluorescence response of bacteria upon incubation with PTPVan through the naked eye and a fluorescence spectroscope, respectively. The staining of Gram-positive bacteria was observed using a confocal laser scanning microscope (CLSM).

Graphical abstract: Vancomycin-conjugated polythiophene for the detection and imaging of Gram-positive bacteria

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Supplementary files

Article information


Submitted
01 Aug 2017
Accepted
16 Oct 2017
First published
16 Oct 2017

J. Mater. Chem. B, 2017,5, 8814-8820
Article type
Paper

Vancomycin-conjugated polythiophene for the detection and imaging of Gram-positive bacteria

L. Gui Ning, S. Wang, X. Feng Hu, C. Ming Li and L. Qun Xu, J. Mater. Chem. B, 2017, 5, 8814
DOI: 10.1039/C7TB02061A

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