Buildup of a protein called filamentous actin, or F-actin, in the brain inhibits the removal of cellular wastes, including DNA, lipids, proteins and organelles. The resulting accumulation of waste diminishes neuronal functions and contributes to cognitive decline. By tweaking a few very specific genes in the neurons of aging fruit flies, the researchers prevented F-actin buildup, maintained cellular recycling and extended the healthy lifespan of fruit flies by approximately 30%.
