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| Content Provider | Springer Nature Link |
|---|---|
| Author | McCully, Mark Hernandez, Yulan Conde, João Baptista, Pedro V. Fuente, Jesus M. Hursthouse, Andrew Stirling, David Berry, Catherine C. |
| Copyright Year | 2015 |
| Abstract | The therapeutic promise of small interfering RNAs (siRNAs) for specific gene silencing is dependent on the successful delivery of functional siRNAs to the cytoplasm. Their conjugation to an established delivery platform, such as gold nanoparticles, offers tremendous potential for treating diseases and advancing our understanding of cellular processes. Their success or failure is dependent on both the uptake of the nanoparticles into the cells and subsequent intracellular release of the functional siRNA. In this study, utilizing gold nanoparticle siRNA-mediated delivery against C-MYC, we aimed to determine if we could achieve knockdown in a cancer cell line with low levels of intracellular glutathione, and determine the influence, if any, of polyethylene glycol (PEG) ligand density on knockdown, with a view to determining the optimal nanoparticle design to achieve C-MYC knockdown. We demonstrate that, regardless of the PEG density, knockdown in cells with relatively low glutathione levels can be achieved, as well as the possible effect of steric hindrance of PEG on the availability of the siRNA for cleavage in the intracellular environment. Gold nanoparticle uptake was demonstrated via transmission electron microscopy and mass spectroscopy, while knockdown was determined at the protein and physiological levels (cells in S-phase) by in-cell westerns and BrdU incorporation, respectively. |
| Starting Page | 3281 |
| Ending Page | 3292 |
| Page Count | 12 |
| File Format | |
| ISSN | 19980124 |
| Journal | Nano Research |
| Volume Number | 8 |
| Issue Number | 10 |
| e-ISSN | 19980000 |
| Language | English |
| Publisher | Tsinghua University Press |
| Publisher Date | 2015-08-28 |
| Publisher Place | Beijing |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | gold nanoparticles PEG glutathione siRNA drug delivery Nanotechnology Materials Science Atomic/Molecular Structure and Spectra Condensed Matter Physics Biotechnology Biomedicine general |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
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