Cited by 12Prion Diseases and Protein MisfoldingCellular transport and secretionAlzheimer's disease research and treatments

Anterograde axonal transport of the exogenous cellular isoform of prion protein in the chick visual system

Butowt, Rafal, Abdelraheim, Salama, Brown, David R., von Bartheld, Christopher S.·2006·Molecular and Cellular Neuroscience

Abstract

The cellular isoform of endogenous, newly synthesized prion protein (PrPc) can be transported by axons in the anterograde direction. To determine whether a mechanism exists for secreted PrPc to be internalized and then axonally transported, we analyzed internalization and anterograde axonal transport of radiolabeled recombinant PrPc after its intraocular injection in chick embryos. Internalization and axonal transport of exogenous PrPc to the midbrain by retinal ganglion cells (RGCs) is efficient, saturable and likely receptor-mediated. Ultrastructural quantitative localization of radiolabeled PrPc within RGC soma showed significant labeling of vesicular/endosomal compartments and much less labeling present over the Golgi apparatus and lysosomes, which indicates slow degradation of exogenous PrPc in this system. These data show that a mechanism exists to internalize a secreted form of PrPc and then to axonally transport such PrPc in an anterograde direction. This may provide an additional, novel mechanism for prion protein to spread among neurons.

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Crossref · 10.1016/j.mcn.2005.09.004

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Authors
Butowt, R., Abdelraheim, S., Brown, D. R., & von Bartheld, C. S.
Affiliations
University of Bath (GB)
Venue
Molecular and Cellular Neuroscience
Publisher
Elsevier BV
Published
2006-01
Volume
31
Issue
1
Pages
97-108
ISSN
1044-7431 (ISSN-L)
OpenAlex
W2008850684
Cited by
12
References
69
Citations by year
2021: 1 · 2020: 1 · 2014: 1
FWCI
0.63
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular and Cellular Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r03ey014405-03)
  • National Eye Institute (EY14405, R01EY012841, EY 12841)
  • National Institute of Neurological Disorders and Stroke (NS 47216, R21NS047216)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
prion protein, anterograde axonal transport, retinal ganglion cells, chick embryo, retinohypothalamic pathway, receptor-mediated internalization, vesicular compartments, endosomal degradation, visual system
MeSH terms
Animals, Axons, Axonal Transport, Chick Embryo, Prions, Recombinant Proteins, Retina, Retinal Ganglion Cells, Vision, Ocular

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