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Determining the Cytosolic Stability of Small DNA Nanostructures . | LitMetric

AI Article Synopsis

Article Abstract

DNA nanostructures have proven potential in biomedicine. However, their intracellular interactions─especially cytosolic stability─remain mostly unknown and attempts to discern this are confounded by the complexities of endocytic uptake and entrapment. Here, we bypass the endocytic uptake and evaluate the DNA structural stability directly in live cells. Commonly used DNA structures─crosshairs and a tetrahedron─were labeled with a multistep Förster resonance energy transfer dye cascade and microinjected into the cytosol of transformed and primary cells. Energy transfer loss, as monitored by fluorescence microscopy, reported the structure's direct time-resolved breakdown . The results showed rapid degradation of the DNA crosshair within 20 min, while the tetrahedron remained consistently intact for at least 1 h postinjection. Nuclease assays in conjunction with a current understanding of the tetrahedron's torsional rigidity confirmed its higher stability. Such studies can inform design parameters for future DNA nanostructures where programmable degradation rates may be required.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9233082PMC
http://dx.doi.org/10.1021/acs.nanolett.2c00917DOI Listing

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