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New highly accurate blood test to measure progress of Alzheimer’s

IANS by IANS
March 31, 2025
in Health
New highly accurate blood test to measure progress of Alzheimer’s
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New Delhi, March 31 (IANS) US researchers have developed a new blood test that not only aids in the diagnosis of Alzheimer’s disease but also indicates how far it has progressed.

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While currently available blood tests for Alzheimer’s disease can diagnose the disease, they do not indicate the clinical stage of the disease symptoms – that is, the degree of impairment in thinking or memory due to Alzheimer’s dementia.

The new test can help doctors determine which patients are likely to benefit from drug treatment and to what extent. It can also provide insight on whether a person’s symptoms are likely due to Alzheimer’s versus some other cause, said the researchers at Washington University School of Medicine in St. Louis, US and Lund University in Sweden.

In the study, published in the journal Nature Medicine, the researchers found that levels of a protein called MTBR-tau243 in the blood accurately reflect the amount of toxic accumulation of tau aggregates in the brain and correlate with the severity of Alzheimer’s disease.

Analysing blood levels of MTBR-tau243 from a group of people with cognitive decline, the researchers were able to distinguish between people with early- or later-stage Alzheimer’s disease and separate both groups of patients from people whose symptoms were caused by something other than Alzheimer’s.

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“This blood test clearly identifies Alzheimer’s tau tangles, which is our best biomarker measure of Alzheimer’s symptoms and dementia,” said co-senior author Randall J. Bateman, Professor of Neurology at Washington University.

“In clinical practice right now, we don’t have easy or accessible measures of Alzheimer’s tangles and dementia, and so a tangle blood test like this can provide a much better indication if the symptoms are due to Alzheimer’s and may also help doctors decide which treatments are best for their patients,” he added.

The researchers developed a technique to measure MTBR-tau243 levels in people’s blood and compared it to the amount of tau tangles in their brains as measured by brain scans.

They piloted the approach on data from two cohorts: 108 people from the US, and a subset of 55 people from Sweden. To assess whether the approach was generalisable, they validated it in an independent dataset consisting of the remaining 739 people in Sweden.

The researchers’ analysis showed that blood MTBR-tau243 levels reflected the amount of tau tangles in the brain with 92 per cent accuracy.

–IANS

rvt/

*Except for the headings & sub-headings, this story has not been edited by The enewstime.in and has been published from IANS feed.

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