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Alcohol intake, even in modest amount, could accelerate Alzheimer's disease: Study

Dr Kartikeya KohliWritten by Dr Kartikeya Kohli Published On 2023-03-04T09:30:18+05:30  |  Updated On 4 March 2023 10:01 AM GMT
Alcohol intake, even in modest amount, could accelerate Alzheimers disease: Study
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USA: A recent study published in Neurobiology of Disease showed that even modest amounts of alcohol could accelerate brain atrophy, which is the loss of brain cells, and increase the number of amyloid plaques is the accumulation of toxic proteins in Alzheimer’s disease.Scientists at Wake Forest University School of Medicine revealed in their preclinical study that alcohol use disorder is a...

USA: A recent study published in Neurobiology of Disease showed that even modest amounts of alcohol could accelerate brain atrophy, which is the loss of brain cells, and increase the number of amyloid plaques is the accumulation of toxic proteins in Alzheimer’s disease.

Scientists at Wake Forest University School of Medicine revealed in their preclinical study that alcohol use disorder is a risk factor for Alzheimer’s disease. However, alcohol use disorder's impact on Alzheimer's disease pathology is a field of continued research. 

“These findings suggest alcohol might accelerate the pathological cascade of Alzheimer’s disease in its early stages,” said Shannon Macauley, Ph.D., associate professor of physiology and pharmacology at Wake Forest University School of Medicine.

Alzheimer’s disease is the most common form of dementia, accounting for 60% to 80% of dementia cases, according to the Alzheimer’s Association. 

The study was a collaboration led by Macauley and Jeffrey Weiner, Ph.D., professor of physiology and pharmacology at Wake Forest University School of Medicine, through the medical school’s Alzheimer’s Disease Research Center and Translational Alcohol Research Center.

Using mouse models of Alzheimer’s disease-related pathology, researchers used a 10-week chronic drinking approach where mice were given the choice to drink water or alcohol, mimicking human behavior regarding alcohol consumption. They then explored how voluntary, moderate consumption of alcohol altered healthy brain function and behavior and whether it altered the pathology associated with the early stages of Alzheimer’s disease.

The researchers found that alcohol increased brain atrophy and caused an increased number of amyloid plaques including a greater number of smaller plaques, potentially setting the stage for increased plaque proliferation in later life.

Interestingly, researchers also noted that acute withdrawal of alcohol increased the amyloid-beta levels, a key component of amyloid plaques that accumulate in Alzheimer’s disease.

Further analysis showed that chronic alcohol exposure poorly regulated brain and peripheral metabolism-another way to accelerate Alzheimer’s disease pathology. Macauley previously showed that elevated blood sugar increases amyloid-beta and amyloid plaques. In the current study, researchers found that even moderate drinking caused elevations in blood sugar and markers of insulin resistance, which increases the risk not only for Alzheimer’s disease but also for other diseases such as type 2 diabetes and cardiovascular disease.

The study also found that moderate alcohol use altered anxiety and dementia-related behaviors.

“These preclinical findings suggest that even moderate consumption of alcohol can result in brain injury,” Macauley said. “Alcohol consumption may be a modifiable risk factor for Alzheimer’s disease and dementia.”

Reference:

Stephen M. Day, Stephen C. Gironda, Caitlin W. Clarke, J. Andy Snipes, Noelle I. Nicol, Hana Kamran, Warner Vaughan, Jeffrey L. Weiner, Shannon L. Macauley, Ethanol exposure alters Alzheimer's-related pathology, behavior, and metabolism in APP/PS1 mice, Neurobiology of Disease https://doi.org/10.1016/j.nbd.2022.105967.

Neurobiology of Diseasealcohol consumptionAlzheimer
Source : Neurobiology of Disease
Dr Kartikeya Kohli
Dr Kartikeya Kohli

    Dr Kartikeya Kohli is an Internal Medicine Consultant at Sitaram Bhartia Hospital in Delhi with super speciality training in Nephrology. He has worked with various eminent hospitals like Indraprastha Apollo Hospital, Sir Gangaram Hospital. He holds an MBBS from Kasturba Medical College Manipal, DNB Internal Medicine, Post Graduate Diploma in Clinical Research and Business Development, Fellow DNB Nephrology, MRCP and ECFMG Certification. He has been closely associated with India Medical Association South Delhi Branch and Delhi Medical Association and has been organising continuing medical education programs on their behalf from time to time. Further he has been contributing medical articles for their newsletters as well. He is also associated with electronic media and TV for conduction and presentation of health programs. He has been associated with Medical Dialogues for last 3 years and contributing articles on regular basis.

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