UNITED KINGDOM – New research analyzing health data from over 130 million people suggests that antibiotics, antivirals, vaccines, and anti-inflammatory medications may be linked to a reduced risk of dementia.
The study, led by scientists from the University of Cambridge and the University of Exeter, identified several existing, approved drugs with potential to be repurposed for dementia treatment.
Dementia is one of the leading causes of death in the UK, significantly impacting individuals and their caregivers. The global economic burden of dementia is estimated to exceed $1 trillion.
This new study leverages data from over 130 million people, indicating that repurposing these drugs might fast-track effective treatments and alleviate the global dementia burden, potentially revolutionizing care for this devastating condition.
Despite extensive research efforts, progress in finding drugs that can slow or prevent dementia has been limited. Until recently, available treatments primarily managed symptoms with only modest effects. New drugs, such as lecanemab and donanemab, have shown promise in slowing the progression of Alzheimer’s disease by reducing the buildup of amyloid plaques in the brain—a hallmark of the condition. However, the National Institute for Health and Care Excellence (NICE) determined that their benefits were not sufficient to warrant approval for use within the NHS.
Accelerating Dementia Treatment with Known Drugs
Scientists are increasingly turning to existing drugs to see if they may be repurposed to treat dementia. As the safety profile of these drugs is already known, the move to clinical trials can be accelerated significantly.
Dr. Ben Underwood, from the Department of Psychiatry at the University of Cambridge and Cambridgeshire and Peterborough NHS Foundation Trust, said: “We urgently need new treatments to slow the progress of dementia, if not to prevent it. If we can find drugs that are already licensed for other conditions, then we can get them into trials and – crucially – may be able to make them available to patients much, much faster than we could do for an entirely new drug. The fact they are already available is likely to reduce cost and therefore make them more likely to be approved for use in the NHS.”
Systematic Review Reveals Potential Dementia Prevention
In a study published today (January 21) in Alzheimer’s and Dementia: Translational Research & Clinical Interventions, Dr. Underwood, together with Dr. Ilianna Lourida from the University of Exeter, led a systematic review of existing scientific literature to look for evidence of prescription drugs that altered the risk of dementia. Systematic reviews allow researchers to pool several studies where evidence may be weak, or even contradictory, to arrive at more robust conclusions.
In total, the team examined 14 studies that used large clinical datasets and medical records, capturing data from more than 130 million individuals and 1 million dementia cases. Although they found a lack of consistency between studies in identifying individual drugs that affect the risk of dementia, they identified several drug classes associated with altered risk.
Insights and Implications from Drug Research
One unexpected finding was an association between antibiotics, antivirals, and vaccines, and a reduced risk of dementia. This finding supports the hypothesis that common dementias may be triggered by viral or bacterial infections, and supports recent interest in vaccines, such as the BCG vaccine for tuberculosis, and decreased risk of dementia.
Anti-inflammatory drugs such as ibuprofen were also found to be associated with reduced risk. Inflammation is increasingly being seen to be a significant contributor to a wide range of diseases, and its role in dementia is supported by the fact that some genes that increase the risk of dementia are part of inflammatory pathways.
The team found conflicting evidence for several classes of drugs, with some blood pressure medications and anti-depressants and, to a lesser extent, diabetes medication associated with a decreased risk of dementia and others associated with increased risk.
Read more at SciTechDaily
