Researchers from Centre National de la Recherche Scientifique, Inserm, Université Claude Bernard and Université Jean Monnet have synthesized peptides acting as amyloid-β (Aβ) protein aggregation inhibitors reported to be useful for the treatment of amyotrophic lateral sclerosis, cerebral amyloid angiopathy, Down syndrome, Parkinson's disease, Alzheimer's disease and motor neuron disease.