But in patients with Alzheimer's disease, amyloid-beta builds up and aggregates in the spaces between the brain's cells, instead of being cleared away  like it's supposed to be, and it's this buildup of amyloid-beta that's thought to be one of the key steps in the development of that terrible disease.
Pero en pacientes con alzhéimer, a beta-amiloide acumúlase e concéntrase nos espazos entre neuronas no canto de ser limpada como debería. E esta acumulación de beta-amiloide cremos que é un dos pasos chave no desenvolvemento  desta terrible enfermidade.