Monday March 25, 2019

A ray of hope: Study reveals Alzheimer’s may be caused by misfiring immune system

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Alzheimer’s

Alzheimer’s

By NewsGram Staff Writer

What could be more frightening than forgetting your own identity?

Finally, a new study suggests that deprivation of an amino acid called arginine may contribute to Alzheimer’s, achronic neurodegenerative disease that usually starts slowly and gets worse over time. It is expected that the finding could throw some light in creating new treatment strategies for patients suffering from the incapacitating illness.

A group of scientists at Duke University disclosed that their studies of Alzheimer’s in mice had shown a new process that they believe contributes to the disease’s development.

The team focused on the immune system of the rat found that cells designed to protect the brain from infection will uncharacteristically consume arginine during the early stages of Alzheimer’s.

The finding suggested that jamming this process with a drug helps in preventing the formation of ‘plaques’ in the brain that are the characteristics of Alzheimer’s disease.

However, there is no assurance that a method tested on animals can work the same way on humans, still the study presents a new ray of hope for the patients of Alzheimer’s. It is so because, until now, the exact role of the immune system and arginine in Alzheimer’s was completely unidentified.

Now, researchers’ next plan is to test older mice suffering from an advanced form of Alzheimer’s.

As per the 2015 statistics of Alzheimer’s Disease International, there are nearly 44 million people worldwide who are suffering from Alzheimer’s or a related dementia.

Next Story

Distress May Spike up Risk of Dementia

For the study, the team included 6,807 Danish participants aged 60 years on average

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Violence
Extreme distress increases risk for dementia: Study. Pixabay

Men and women who are distressed in midlife could be at higher risk of developing dementia in their old age, suggests a new study.

The study showed that vital exhaustion, which can be perceived as an indicator of psychological distress, is a risk factor for future risk of dementia.

Psychological distress is potentially linked to the risk of dementia through neurological and cardiovascular mechanisms.

The findings, led by researchers from the University of Copenhagen in Denmark, revealed that for each additional symptom of vital exhaustion, the risk of dementia rose by two per cent.

While participants reporting five to nine symptoms had a 25 per cent higher risk of dementia than those with no symptoms, those reporting 10 to 17 symptoms had a 40 per cent higher risk of dementia compared with not having symptoms.

However, the researchers are yet not aware of "exactly how anticholinergics might cause dementia", the researchers said.
Representational Image- dementia, Pixabay

Importantly, physiological stress response, including cardiovascular changes and excessive production of cortisol over a prolonged period, may also contribute to linking psychological distress with an increased risk of dementia, revealed the study published in the Journal of Alzheimer’s Disease.

“Stress can have severe and harmful consequences not just for our brain health, but our health in general. Cardiovascular risk factors are well-known modifiable risk factors for dementia, and in some countries, a stagnation or even a decreasing incidence of dementia has been observed,” said Sabrina Islamoska, postdoctoral student from the varsity.

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For the study, the team included 6,807 Danish participants aged 60 years on average.

Psychological distress is an important risk factor that should receive more focus when considering prevention initiatives in relation to later dementia, the team said. (IANS)