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Blood Biomarkers for Alzheimer’s Disease: What do they mean for the NHS?

The Challenge of Diagnosing Alzheimer’s

Alzheimer’s disease (AD) is a leading cause of death in the UK as well as affecting nearly a million people. Currently, the diagnostic pathway for AD is based on clinical symptoms that emerge late in the disease, often after 20 years of progressive accumulation of intracerebral pathological AD features.  When memory, mood, or personality changes are noticed, individuals or their family usually seek advice from a general practitioner, who may perform some cognitive tests along with some general blood tests.  If cognitive decline is suspected, the patient is often referred to a memory clinic or to Old Age Psychiatry Clinics within Mental Health Trusts for further evaluation, aimed at confirming cognitive decline and ruling out reversible causes.    

The Promise of Blood Biomarkers

Recent advances in blood-based biomarkers hold promise for transforming AD identification and care.  These biomarkers have shown similar sensitivity and specificity to positron emission tomography (PET) scan and cerebrospinal fluid (CSF) tests in specialist settings.  If reliably predictive blood tests were to become available at low cost in primary care, this could be transformative for AD identification. 

The NHS and Blood Biomarkers

The UK's National Health Service (NHS) is exploring how to adopt and integrate these innovations into its care model.  Initiatives like the Davos Alzheimer's Collaborative (DAC) International Initiative, the AD RIDDLE study, and the UK's Blood Biomarker Challenge aim to pilot real-world implementation and validation of blood-based biomarkers, with hopes of integrating them into the NHS within the next few years.    

The Future of Alzheimer’s Care

Blood-based biomarkers have the potential to revolutionize early detection of Alzheimer’s disease, making diagnosis more accessible and affordable.  This could lead to earlier intervention and better outcomes for patients.  With a focus on affordability, accessibility, and robust post-launch monitoring, an Alzheimer's care framework that is more effective, equitable, and capable of transforming the lives of those affected by the disease can be created.    

Read more in our article in the Journal of the Royal Society of Medicine.


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