Forbes -- The brains of people with the memory-robbing form of dementia are cluttered with a plaque made up of beta-amyloid, a sticky protein. But there long has been a question whether this is a cause of the disease or a side effect. Also involved are tangles of a protein called tau; some scientists suspect this is the cause. Now, researchers have caused Alzheimer’s symptoms in rats by injecting them with one particular form of beta-amyloid.
