A brain-penetrating protein cuts amyloid-beta deposits by about 53% in model mice

A KAIST-led team found that zinc-finger segment ZF2–4 binds amyloid-beta regions involved in aggregation, suppressing long toxic fibrils and breaking existing fibrils into shorter, less toxic fragments. Adding a short peptide created brain-penetrating ZF2–4–P9. In transgenic Alzheimer's-model mice it reduced amyloid-beta deposits by about 53% in both cerebral cortex and hippocampus and improved object-recognition memory. Other learning and memory tests did not show statistically significant improvement, while human efficacy, long-term safety and delivery remain unknown, so the animal result is not a clinical treatment.