HomeAURevolutionary Blood Test Offers Predictive Insight into Alzheimer's Onset Timing

Revolutionary Blood Test Offers Predictive Insight into Alzheimer’s Onset Timing

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A new blood test could be able to clock when someone may begin to have symptoms of Alzheimer’s disease, an American study claims.
Alzheimer’s is the cause of up to 75 per cent of dementia diagnoses in Australia, with 425,000 people living with dementia in 2024. That number is expected to rise to 1 million by 2065.

According to Alzheimer’s Research Australia, approximately 250 individuals are diagnosed with dementia every day, making it the second leading cause of death in the nation.

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Researchers in the United States believe this blood test is a cheaper way to screen for Alzheimer’s disease. (iStock/Getty)
Dementia, which is incurable, costs the Australian government around $4.7 billion a year, but researchers from Washington University claim they can accurately identify when someone will begin to show symptoms of Alzheimer’s, accurate to around four years.

Recent advancements have introduced a blood test capable of detecting elevated levels of a protein known as p-tau217. Higher concentrations of this protein in the blood can signal an increased risk of developing Alzheimer’s disease.

This is particularly pertinent for individuals already experiencing some form of cognitive impairment.

Traditionally, assessing p-tau levels required either brain scans or spinal fluid tests. However, researchers are optimistic that this new blood test will enable earlier detection of symptoms. It also offers a more cost-effective solution.

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Memory loss and confusion are two symptoms of Alzheimer’s. (iStock)

“In the near-term, these models will accelerate our research and clinical trials,” stated Suzanne Schindler of Washington University, emphasizing the potential impact of these developments.

The study’s authors shared their findings publicly in the hope it would aid other research on the disease.

“Eventually, the goal is to be able to tell individual patients when they are likely to develop symptoms, which will help them and their doctors to develop a plan to prevent or slow symptoms.”

Early symptoms of Alzheimer’s can include memory loss, confusion, and repetitive or vague speech

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