Researchers have identified a brain protein called Arc that may play a key role in how Alzheimer’s disease spreads through the brain. The study found that Arc can transport toxic Tau proteins from damaged neurons to healthy ones using tiny extracellular vesicles. Once inside healthy cells, these Tau proteins trigger the formation of new toxic clumps, allowing the disease to spread. The findings suggest that future treatments could focus on blocking these protein-carrying vesicles before they reach healthy brain cells, potentially slowing the progression of Alzheimer’s without removing Tau entirely. While the results are based primarily on mouse studies, researchers also found evidence of the same mechanism in human brain tissue, offering a promising direction for future Alzheimer’s therapies.
