Researchers proved for the first time that toxic Alzheimer's proteins retain their specific physical structures when passed from human brains into animals.
April 1, 2026
Original Paper
Prion-like transmission of human tau strains in the mouse brain
bioRxiv · 10.64898/2026.03.30.715211
The Takeaway
This confirms a core pillar of the 'prion' theory of neurodegeneration: that the disease spreads because the protein's physical shape acts as a template, forcing other proteins to clump into that exact same fold. It demonstrates that the disease-driving 'shape' of the protein is stable enough to survive transmission even between different species.
From the abstract
Most neurodegenerative diseases are believed to spread through the brain by prion-like mechanisms, where filamentous protein assemblies self-propagate by templated seeding. Distinct conformations of amyloid filaments are thought to provide the physical basis for the strains that lead to different diseases. However, a central pillar of the prion hypothesis, that strains retain their structural identity upon transmission, has not been demonstrated. Here we show that the injection of tau filaments