A widely available vaccine for shingles may offer a surprising additional benefit: slowing the progression of dementia, according to a new study published in the journal Nature. Researchers examining vaccination records in Wales found that recipients of the shingles vaccine showed a decreased risk of developing cognitive impairment and, for those already diagnosed, a slower rate of disease progression. The findings offer a potential new avenue for mitigating the effects of dementia,a condition impacting millions globally and currently lacking complete treatment options.
LONDON (IT BOLTWISE) – A new study suggests that the existing shingles vaccine may not only reduce the risk of mild cognitive impairment but also slow the progression of dementia. This discovery could have significant implications for public health, as dementia affects millions worldwide and currently has limited treatment options.
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Research recently published in the journal Nature indicates that the shingles vaccine, which has been in use in Wales since 2013, is associated with a decreased risk of developing mild cognitive impairment and a slower rate of dementia progression. The study also found that the vaccine may reduce mortality rates in patients already diagnosed with dementia by nearly 30 percent.
The vaccine targets the varicella-zoster virus, which causes shingles, and researchers believe the virus may also impact the nervous system. They hypothesize that protecting the nervous system from viral activity could offer a protective effect against dementia. This idea is supported by evidence from animal studies linking viruses that affect the nervous system to the buildup of toxic proteins observed in Alzheimer’s disease.
The study leveraged a unique situation within the Welsh vaccination program, where individuals aged 79 received the vaccine, while those aged 80 did not. This naturally occurring age cutoff allowed researchers to compare two very similar groups, minimizing the influence of other factors on dementia risk.
Researchers emphasize that further investigation is needed to fully understand the mechanisms by which the vaccine may protect against dementia. They suggest that both the nervous system and the immune system likely play a role. Future studies could involve larger groups of participants across a wider age range and incorporate newer versions of the vaccine.
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