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Updated: Jul 10, 2026
10:26
Monitoring Cell-to-cell Transmission of Prion-like Protein Aggregates in Drosophila Melanogaster
Published on: March 12, 2018
Cell division modulates prion accumulation in cultured cells
Sina Ghaemmaghami1, Puay-Wah Phuan, Beth Perkins
1Institute for Neurodegenerative Diseases and Department of Neurology, University of California, San Francisco, CA 94143, USA.
Summary
Cell division reduces prion levels but doesn't eliminate them, influencing prion disease dynamics. Understanding prion propagation kinetics in neuroblastoma (N2a) cells is key for developing effective treatments.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Prion diseases stem from misfolded proteins accumulating in host cells.
- Prion accumulation is a dynamic process involving formation, degradation, cell division, and transmission.
- Modeling prion heritability and infectivity requires understanding these competing factors.
Purpose of the Study:
- To quantitatively measure prion formation, catabolism, and transmission in a neuroblastoma (N2a) cell line.
- To develop a kinetic model for prion propagation based on experimental data.
- To investigate the impact of cell division and cell-to-cell transmission on prion levels.
Main Methods:
- Utilized a subline of neuroblastoma (N2a) cells for prion accumulation studies.
- Quantitatively measured competing effects of prion formation, catabolism, and cell division.
- Developed a reaction mechanism to model prion propagation kinetics.
Main Results:
- Cell division predictably reduces but does not eliminate steady-state prion levels.
- Scrapie-infected N2a cells exhibited varying steady-state prion levels influenced by cell division rates.
- Prion transmission was primarily mother-to-daughter, not horizontal.
Conclusions:
- Prion propagation kinetics can be modeled by a mechanism involving a self-catalytic prion subpopulation.
- Cell growth phase significantly impacts the observed efficacy of antiprion compounds in cell cultures.
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