Scientists May Have Found How Alzheimer’s Spreads Through the Brain
A common brain protein may be giving Alzheimer’s disease an unexpected way to spread, carrying toxic Tau proteins from damaged neurons into healthy ones. By blocking these harmful protein packages before they reach new cells, researchers believe it may one day be possible to slow the disease’s relentless progression.
How Arc Helps Toxic Tau Travel
The researchers found that toxic Tau can exploit this natural communication system. By attaching itself to Arc inside these microscopic vesicles, Tau is able to travel from an unhealthy neuron into a healthy one, where it can continue spreading disease.

