Health Early-stage detection of Alzheimer’s can be detected in the blood

tom_mai78101

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Two major studies with promising antibodies have recently failed – possibly because they have been administered too late. A new very early-detection test gives rise to hope.

Using current techniques, Alzheimer’s disease, the most frequent cause of dementia, can only be detected once the typical plaques have formed in the brain. At this point, therapy seems no longer possible. However, the first changes caused by Alzheimer’s take place on the protein level up to 20 years sooner. A two-tier method developed at Ruhr-Universität Bochum (RUB) can help detect the disease at a much earlier stage. The researchers from Bochum published their report in the March 2019 edition of the journal “Alzheimer’s and Dementia: Diagnosis, Assessment and Disease Monitoring”.

“This has paved the way for early-stage therapy approaches, where the as yet inefficient drugs on which we had pinned our hopes may prove effective,” says Professor Klaus Gerwert from the Department of Biophysics at RUB.

In Alzheimer’s patients, the amyloid beta protein folds incorrectly due to pathological changes long before the first symptoms occur. A team of researchers headed by Klaus Gerwert successfully diagnosed this misfolding using a simple blood test; as a result, the disease can be detected approximately eight years before the first clinical symptoms occur. The test wasn’t suitable for clinical applications however: it did detect 71 per cent of Alzheimer’s cases in symptomless stages, but at the same time provided false positive diagnoses for nine per cent of the study participants. In order to increase the number of correctly identified Alzheimer’s cases and to reduce the number of false positive diagnoses, the researchers poured a lot of time and effort into optimising the test.


Read more here. (Ruhr-Universität Bochum, RUB)
 
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