Brain HealthAlzheimer's May Start With Protein Hijacking, Not Just Plaque Buildup
Alzheimer's disease may begin with a molecular rivalry inside brain cells, not simply plaque accumulation. Researchers at UC Riverside discovered that amyloid beta, the protein long blamed for Alzheimer's, can compete directly with tau for binding sites on microtubules — the internal transport structures that keep neurons alive. When amyloid beta displaces tau, the neuron's delivery system breaks down, and tau begins clumping abnormally. This new model reframes decades of research, suggesting that plaques and tangles may be symptoms of deeper cellular disruption rather than the root cause. Published in PNAS Nexus, the findings could help explain why anti-amyloid drugs have largely failed and open new therapeutic directions targeting the amyloid-tau interaction.
