Don't smash the scissors, slow them: a lab-made molecule halves an Alzheimer's protein in mice

Deep in the brain, an enzyme nicknamed 'the scissors' snips a protein into amyloid beta, the sticky fragment that builds up in Alzheimer's disease. Drugs that blocked the scissors completely failed in trials, partly because the body needs them for other jobs. So a Barcelona team led by Dayaneth Jácome, José A. Del Río and Rosalina Gavín at the Institute for Bioengineering of Catalonia tried gentleness instead: from 50 candidate molecules, their peptide P33 — published in Bioorganic Chemistry — merely slows the scissors, selectively. In cultured neurons it cut amyloid release to less than half; in mice, eight weeks of P33 shrank brain amyloid and plaque area by 35.6%, with no organ damage detected. It is early, mouse-stage work — but the principle, ease rather than block, is a genuinely new door.

SDG 3 · Good health and well-being — Mechanism: tech innovation