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Volume 91, Issue 2

Cell density-dependent increase in the level of protease-resistant prion protein in prion-infected Neuro2a mouse neuroblastoma cells Free

Abstract

Cells persistently infected with prions continuously produce protease-resistant prion protein (PrP-res). Here, we show that the PrP-res level in prion-infected Neuro2a (N2a) neuroblastoma cells decreased to 50 % of their initial level over the first 48 h and then recovered by 96 h after seeding. The level of cellular prion protein (PrP) also appeared to fluctuate, but did not influence the fluctuation of the PrP-res level. Prion-infected N2a cells, co-cultured with a higher number of prion-unsusceptible cells, had twice as much PrP-res as those cultured without unsusceptible cells, suggesting that cell density influences the fluctuation of PrP-res as. Direct cell-to-cell contact between cells, rather than soluble factors, was involved in the cell density-dependent increase in the PrP-res level. The cholesterol content, which is known to influence PrP-res formation, also changed depending on cell density. Our data suggest that alterations in cellular microenvironments controlled by cell density influence PrP-res formation.

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2010-02-01
2024-04-19
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Cell density-dependent increase in the level of protease-resistant prion protein in prion-infected Neuro2a mouse neuroblastoma cells
J. Gen. Virol. 91, 563 (2010); https://doi.org/10.1099/vir.0.016287-0
/content/journal/jgv/10.1099/vir.0.016287-0
/content/journal/jgv/10.1099/vir.0.016287-0
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vol. , part 2, pp. 563 - 569

Kinetics of the change in PrP levels in N2a subclones

Kinetics of PrP and PrP-res levels in N2a cells overexpressing mouse PrP

Detection of intracellular PrP by IFA

Effect of cell-density on PrP level

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