Real-time visualization of prion transport in single live cells using quantum dots
- State Key Laboratory of Virology and Modern Virology Research Centre, College of Life Sciences, Wuhan University, Wuhan 430072 (China)
- AIDS Research Centre, Institute of Pathogen Biology, Chinese Academy of Medical Science, Beijing 100730 (China)
- College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072 (China)
Prion diseases are fatal neurodegenerative disorders resulting from structural conversion of the cellular isoform of PrP{sup C} to the infectious scrapie isoform PrP{sup Sc}. It is believed that such structural alteration may occur within the internalization pathway. However, there is no direct evidence to support this hypothesis. Employing quantum dots (QDs) as a probe, we have recorded a real-time movie demonstrating the process of prion internalization in a living cell for the first time. The entire internalization process can be divided into four discrete but connected stages. In addition, using methyl-beta-cyclodextrin to disrupt cell membrane cholesterol, we show that lipid rafts play an important role in locating cellular PrP{sup C} to the cell membrane and in initiating PrP{sup C} endocytosis.
- OSTI ID:
- 22202450
- Journal Information:
- Biochemical and Biophysical Research Communications, Vol. 394, Issue 3; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0006-291X
- Country of Publication:
- United States
- Language:
- English
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