Lipophilic pro-oligonucleotides are rapidly and efficiently internalized in HeLa cells
1999
Model t-Bu-SATE pro-dodecathymidines labeled with fluorescein and exhibiting various lipophilicities were evaluated for their uptake by cells in culture. Pro-oligonucleotides with appropriate lipophilicity were found to permeate across the HeLa cell membrane much more extensively than the control phosphorothioate oligo or than the hydrophilic pro-oligos. Fluorescence patterns of internalization were consistent with a diffusion mechanism resulting in the appearance of a uniform cytoplasmic distribution and nuclear accumulation, as confirmed by confocal microscopy.
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