Researchers have made a discovery involving the use of engineered brain cells, known as CAR-astrocytes, to clear amyloid plaques, which are associated with dementia and Alzheimer's disease. The therapy has shown promise in mouse models, with some reports indicating it can prevent plaque formation or reduce existing plaques. The treatment involves reprogramming brain cells to target the plaques, and it may potentially be delivered through a single injection, although the specifics and effectiveness of the approach are still being explored.