Human drug trials start next week for a once-a-day pill that may cure Alzheimer's.
Many scientists accept amyloid is a major cause of Alzheimer's as the protein is thought to cause the brain to "rust".
Prof Fink said the drug could significantly prevent Alzheimer's developing or delay the on-set of the brain disease for many years.
Early clinical testing has confirmed the drug is fast-acting. Levels of amyloid dropped by 60 per cent within 24 hours of a single dose.
It found also that PBT2 suppresses the impairment of memory function.