Imaging the distribution of individual platinum-based anticancer drug molecules attached to single-wall carbon nanotubes. Nanomedicine (London, England) [Nanomed] Journal article | | Title | Imaging the distribution of individual platinum-based anticancer drug molecules attached to single-wall carbon nanotubes. | | Author(s) | Bhirde AA, Sousa AA, Patel V, Azari AA, Gutkind JS, Leapman RD, Rusling JF | | Institution | University of Connecticut, Storrs, CT 06269, USA. | | Source | Nanomed 2009 Oct; 4(7):763-72. | | Abstract | AIMS: To image the distribution of drug molecules attached to single-wall carbon nanotubes (SWNTs). MATERIALS &
METHODS: Herein we report the use of scanning transmission electron microscopy (STEM) for atomic scale visualization and quantitation of single platinum-based drug molecules attached to SWNTs designed for targeted drug delivery. Fourier transform infrared spectroscopy and energy-dispersive x-ray spectroscopy were used for characterization of the SWNT drug conjugates.
RESULTS: Z-contrast STEM imaging enabled visualization of the first-line anticancer drug cisplatin on the nanotubes at single molecule level. The identity and presence of cisplatin on the nanotubes was confirmed using energy-dispersive x-ray spectroscopy and Fourier transform infrared spectroscopy. STEM tomography was also used to provide additional insights concerning the nanotube conjugates. Finally, our observations provide a rationale for exploring the use of SWNT bioconjugates to selectively target and kill squamous cancer cells.
CONCLUSION: Z-contrast STEM imaging provides a means for direct visualization of heavy metal containing molecules (i.e., cisplatin) attached to surfaces of carbon SWNTs along with distribution and quantitation. | | Language | eng | | Pub Type(s) | Journal Article
Research Support, N.I.H., Extramural
Research Support, N.I.H., Intramural
| | PubMed ID | 19839812 |
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