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Issue 6, 2014
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Sequence-responsive unzipping DNA cubes with tunable cellular uptake profiles

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Here, we demonstrate a new approach for the design and assembly of a dynamic DNA cube with an addressable cellular uptake profile. This cube can be selectively unzipped from a 3D to a flat two-dimensional structure in the presence of a specific nucleic acid sequence. Selective opening is demonstrated in vitro using a synthetic RNA marker unique to the LNCaP human prostate cancer cell line. A robust uptake in LNCaP cells, HeLa cells (human cervical cancer) and primary B-lymphocytes isolated from the blood of chronic lymphocytic leukemia (CLL) patients is observed using fluorescence-activated cell sorting (FACS), confocal microscopy and a new cluster analysis algorithm combined with image cross-correlation spectroscopy. The DNA cube was modified with hydrophobic and hydrophilic dendritic chains that were found to coat its exterior. The dynamic unzipping properties of these modified cubes were retained, and assessment of cellular uptake shows that the hydrophobic chains help with the rapid uptake of the constructs while the hydrophilic chains become advantageous for long term internalization.

Graphical abstract: Sequence-responsive unzipping DNA cubes with tunable cellular uptake profiles

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Publication details

The article was received on 28 Feb 2014, accepted on 31 Mar 2014 and first published on 31 Mar 2014

Article type: Edge Article
DOI: 10.1039/C4SC00646A
Citation: Chem. Sci., 2014,5, 2449-2455
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    Sequence-responsive unzipping DNA cubes with tunable cellular uptake profiles

    K. E. Bujold, J. Fakhoury, T. G. W. Edwardson, K. M. M. Carneiro, J. N. Briard, A. G. Godin, L. Amrein, G. D. Hamblin, L. C. Panasci, P. W. Wiseman and H. F. Sleiman, Chem. Sci., 2014, 5, 2449
    DOI: 10.1039/C4SC00646A

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