Scientists may have overlooked a hidden Alzheimer's culprit for decades

For decades, researchers have invested billions of dollars in Alzheimer's treatments designed to target amyloid beta, a peptide that forms harmful deposits in the brain. But a biochemist at the University of California, Santa Cruz, believes scientists may have overlooked another potential contributor to the disease: a smaller, closely related peptide that was long considered harmless.

In a new commentary published in ChemBioChem , UC Santa Cruz professor Jevgenij Raskatov highlights research suggesting that this lesser-known peptide, called P3, can form microscopic clumps and threadlike structures known as fibrils. Evidence also suggests that P3 may interact with amyloid beta (A ), potentially influencing how it accumulates in the brain and how toxic it becomes. These findings raise the possibility that P3 contributes to the nerve cell damage associated with Alzheimer's disease.