Prion propagation in vitro: are we there yet?

Area of Science:

• Neuroscience
• Biochemistry
• Molecular Biology

Background:

• Prion diseases are fatal neurodegenerative disorders caused by infectious proteins called prions.
• Prion replication involves the conformational conversion of cellular prion protein (PrP(C)) into a misfolded, pathogenic form (PrP(Sc)).
• Studying prion replication in vitro remains challenging due to the lack of systems fully mimicking in vivo conditions.

Purpose of the Study:

• To review the development of in vitro prion propagation assays.
• To discuss the capabilities of these assays in reflecting in vivo prion propagation.

Main Methods:

• Review of established in vitro systems for prion propagation.
• Analysis of assays supporting PrP(C) conversion, PrP(Sc) amplification, and amyloid fibril formation.

Main Results:

• Various in vitro systems have been developed over the last 15 years.
• These systems facilitate the study of prion conversion and amplification.
• The ability of these assays to recapitulate in vivo prion propagation varies.

Conclusions:

• In vitro prion propagation assays have evolved significantly.
• These assays provide valuable tools for understanding prion diseases.
• Further refinement is needed to fully replicate in vivo prion behavior.