Tau proteinopathies and the prion concept

Area of Science:

• Neuroscience
• Biochemistry
• Pathology

Background:

• Amyloid filaments formed by protein aggregates are implicated in age-related neurodegenerative diseases.
• Tau protein is frequently involved, with its abnormal assembly contributing to disease progression.
• These tau assemblies spread through the brain, causing disease symptoms.

Purpose of the Study:

• To investigate the prion-like behavior of assembled tau.
• To characterize the structural diversity of tau filaments in different neurodegenerative diseases.

Main Methods:

• Analysis of electron cryo-microscopy data of tau filaments.
• Comparison of tau filament structures across various disease states.

Main Results:

• Evidence supports that assembled tau acts as a prion.
• Distinct tau conformers were identified in different diseases.
• No variation in tau conformation was observed within individuals for a specific disease.

Conclusions:

• Assembled tau exhibits prion-like properties, driving neurodegeneration.
• Disease-specific tau conformers represent potential diagnostic or therapeutic targets.
• Structural uniformity of tau within a disease suggests a common pathogenic mechanism.