Nonneuronal cellular prion protein.

Area of Science:

• Neuroscience
• Molecular Biology
• Pathology

Background:

• The normal cellular prion protein (PrP(c)) is a sialoglycoprotein with an unknown function.
• PrP(c) can misfold into a pathological form (PrP(sc)), the agent of transmissible spongiform encephalopathies (prion diseases).
• Prion diseases affect both animals (scrapie, BSE) and humans (Creutzfeldt-Jakob disease).

Purpose of the Study:

• To evaluate data on PrP(c)-expressing nonneuronal cells in various tissues.
• To understand the biological function of PrP(c).
• To gain insights into the physiopathological processes of prion diseases.

Main Methods:

• Review of existing scientific literature and data.
• Analysis of the tissue, cellular, and subcellular localization of PrP(c).

Main Results:

• PrP(c) to PrP(sc) conversion occurs in the brain, influencing disease phenotype.
• PrP(c) misfolding can also happen in nonneuronal cells, particularly in lymphoid tissue where the prion agent replicates.
• PrP(c) in nonneuronal cells of peripheral organs may act as a receptor for prion agent entry.

Conclusions:

• PrP(c) is present in nonneuronal cells in both cerebral and extracerebral tissues.
• Understanding the localization of PrP(c) is crucial for elucidating its biological role.
• Further analysis of PrP(c) localization may illuminate the mechanisms underlying prion diseases.