Could a blood test help predict the development of Alzheimer's?
Scientists at the Washington University used mass spectrometry to measure amounts of two types of amyloid beta in the blood: amyloid beta 40 and 42.
They found the ratio of these types in the blood goes down as the amount of the substance in the brain increases. The new test may be able to warn of amyloid deposits forming years before they can be identified by PET scans.
When combined with risk factor evaluation, the test is said to have a 94 percent accuracy. It is hoped that early detection will allow people to take action to slow down disease progression.
The findings have been published in Neurology.
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