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DNA cage delivery to mammalian cells
Anthony S Walsh1, HaiFang Yin, Christoph M Erben
1Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
ACS Nano
|June 24, 2011
Summary
DNA cages, or DNA tetrahedra, are effectively internalized by mammalian cells. These nanostructures remain intact in the cytoplasm for at least 48 hours, showing potential for cellular delivery applications.
Area of Science:
- Nanotechnology
- Molecular Biology
- Cell Biology
Background:
- DNA cages are self-assembling nanostructures with potential applications in medicine.
- Understanding their cellular uptake is crucial for developing these applications.
Purpose of the Study:
- To investigate the cellular uptake and intracellular fate of DNA tetrahedra in mammalian cells.
- To assess the integrity of DNA cages within cells over time.
Main Methods:
- Treatment of human embryonic kidney cells with fluorescently labeled DNA tetrahedra.
- Confocal microscopy and flow cytometry for uptake analysis.
- Organelle staining and Förster Resonance Energy Transfer (FRET) experiments for localization and integrity.
Main Results:
- Substantial uptake of DNA tetrahedra into cells was observed, both with and without transfection reagents.
- DNA cages were localized in the cytoplasm.
- DNA cages remained largely intact within cells for at least 48 hours post-transfection.
Conclusions:
- DNA tetrahedra can be efficiently internalized by mammalian cells.
- These DNA nanostructures demonstrate stability within the cellular environment.
- This study is a foundational step towards utilizing DNA nanostructures for intracellular cargo delivery.
