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Blood test could revolutionise diagnosis of Alzheimer’s, experts say

A blood test for detecting Alzheimer’s disease could be just as accurate as painful and invasive lumbar punctures and could revolutionise diagnosis of the condition, research suggests.

Measuring levels of a protein called p-tau217 in the blood could be just as good as lumbar punctures at detecting the signs of Alzheimer’s, and better than a range of other tests under development, experts say.

The protein is a marker for biological changes that happen in the brain with Alzheimer’s disease.

Dr Richard Oakley, an associate director of research and innovation at the Alzheimer’s Society, said: “This study is a hugely welcome step in the right direction as it shows that blood tests can be just as accurate as more invasive and expensive tests at predicting if someone has features of Alzheimer’s disease in their brain.

“Furthermore, it suggests results from these tests could be clear enough to not require further follow-up investigations for some people living with Alzheimer’s disease, which could speed up the diagnosis pathway significantly in future. However, we still need to see more research across different communities to understand how effective these blood tests are across everyone who lives with Alzheimer’s disease.”

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Source: The Guardian, 23 January 2024



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