http://www.bbc.com/news/health-42878721
Citando:
"One method is to look for a toxic protein - called amyloid beta - that builds up in the brain during the disease.
It can be detected with brain scans, but these are expensive and impractical.
'Major implications'
The new approach, a collaboration among universities in Japan and Australia, looks for fragments of amyloid that end up in the blood stream.
By assessing the ratios of types of amyloid fragment, the researchers could accurately predict levels of amyloid beta in the brain.
Significantly, the study shows it is possible to look in the blood to see what is happening in the brain."
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