Neuronal Protein Tracing Reveals How the Brain Routes Its Waste

Amyloid plaques in Alzheimer's disease [Artur Plawgo / iStock / Getty Images Plus] The brain is one of the busiest organs in the body, constantly processing and reshaping itself. That activity produces an equally constant stream of molecular byproducts—proteins that need to be moved out before they accumulate. When those clearance routes slow or break down, waste lingers, and the consequences can be profound. In Alzheimer’s disease, for example, toxic proteins build up in vulnerable regions. Yet despite decades of research, scientists have lacked a clear view of how waste normally leaves the brain.

Neuronal Protein Tracing Reveals How the Brain Routes Its Waste. Amyloid plaques in Alzheimer's disease [Artur Plawgo / iStock / Getty Images Plus] The brain is one of the busiest organs in the body, constantly processing and reshaping itself. That activity produces an equally constant stream of molecular byproducts—proteins that need to be moved out before they accumulate. When those clearance routes slow or break down, waste lingers, and the consequences can be profound. In Alzheimer’s disease, for example, toxic proteins build up in vulnerable regions. Yet despite decades of research, scientists have lacked a clear view of how waste normally leaves the brain. A new study from the Gladstone Institutes offers the clearest picture yet of how the brain normally takes out its trash—and what happens when those routes fail. Published in Cell...