Novel Drug Prevents Amyloid Plaques, a Hallmark of Alzheimer’s Disease In animal models, the new compound modulated a key enzyme, reducing or eliminating production of problematic protein fragments; human clinical trials needed March 02, 2021 | Scott LaFee News_release Amyloid plaques are pathological hallmarks of Alzheimer’s disease (AD) — clumps of misfolded proteins that accumulate in the brain, disrupting and killing neurons and resulting in the progressive cognitive impairment that is characteristic of the widespread neurological disorder. In a new study, published M...