Tiny bubbles ferry antibodies into the brain — and tag Alzheimer's proteins for the bin

The brain defends itself fiercely: of antibodies injected into the blood, only about 1 in 10,000 reaches it, which is why antibody medicines struggle against Alzheimer's. A University of Ottawa team led by Derrick Gibbings, with lead researcher Huishan Guo, has built a courier from the body's own packaging — extracellular vesicles, the tiny bubbles cells naturally release. Reporting in Nature Biomedical Engineering, they engineered the bubbles to carry antibodies across the blood-brain barrier and fitted them with receptors that tag the harmful proteins Tau and TDP-43 for the cell's recycling system. In cells and mouse models, the approach cleared far more of the proteins linked to Alzheimer's, dementia and ALS, and improved symptoms. It is an early step, years from patients — but a door that was nearly shut is now ajar.

SDG 3 · Good health and well-being — Mechanism: tech innovation