Abstract
The fluorescence of silver clusters encapsulated by single stranded oligo-DNA (24 cytosine base pairs, C24:Agn) was used to monitor the transfection of this new silver/DNA fluorophore inside living HeLa cells. For this, the C24:Agn molecules were complexed with a commercially available transfection reagent Lipofectamine and the internalization of C24:Agn was followed with confocal fluorescence microscopy. Bright near-infrared fluorescence was observed from inside the transfected HeLa cells, when exciting with 633 nm excitation, opening up the possibility for the use of these C24:Agn clusters for biological labelling and imaging of living cells and for monitoring the transfection process with limited harm to the living cells.
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Antoku, Y., Hotta, Ji., Mizuno, H. et al. Transfection of living HeLa cells with fluorescent poly-cytosine encapsulated Ag nanoclusters. Photochem Photobiol Sci 9, 716–721 (2010). https://doi.org/10.1039/c0pp00015a
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DOI: https://doi.org/10.1039/c0pp00015a