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Can Asprin Treat Alzheimer’s?

By Rush University | July 3, 2018

A regimen of low-dose aspirin may reduce plaques in the brain, which will reduce Alzheimer’s disease pathology and protect memory, according to neurological researchers at Rush University Medical Center. Results of their study were published in the July issue of The Journal of Neuroscience.

“The results of our study identify a possible new role for one of the most widely used, common, over-the-counter medications in the world,” said Kalipada Pahan, PhD, the study’s senior author and lead research investigator, who also is the Floyd A. Davis, MD, Endowed Chair of Neurology and professor of neurological sciences, biochemistry and pharmacology at Rush Medical College.

Alzheimer’s disease is a fatal form of dementia that affects up to one in 10 Americans age 65 or older. To date, the FDA has approved very few drugs for the treatment of Alzheimer’s disease-related dementia, and the medications that exist can only provide limited symptomatic relief.

Aspirin Helps Clear Cellular Debris From the Brain
The exact cause of Alzheimer’s disease progression is unknown; however, poor disposal of the toxic protein amyloid beta in the brain is a leading mechanism in dementia and memory loss.

Activating the cellular machinery responsible for removing waste from the brain has emerged as a promising strategy for slowing Alzheimer’s disease.

Amyloid beta forms clumps called amyloid plaques, which harm connections between nerve cells and are one of the major signs of Alzheimer’s disease. Building on previous studies demonstrating a link between aspirin and reduced risk and prevalence of Alzheimer’s disease, Pahan and his colleagues were able to show that aspirin decreases amyloid plaque pathology in mice by stimulating lysosomes — the component of animal cells that help clear cellular debris.

“Understanding how plaques are cleared is important to developing effective drugs that stop the progression of Alzheimer’s disease,” Pahan said.

A protein called TFEB is considered the master regulator of waste removal. The researchers gave aspirin orally for a month to genetically modified mice with Alzheimer’s pathology, then evaluated the amount of amyloid plaque in the parts of the brain affected most by Alzheimer’s disease.

They found that the aspirin medications augmented TFEB, stimulated lysosomes and decreased amyloid plaque pathology in the mice.

“This research study adds another potential benefit to aspirin’s already established uses for pain relief and for the treatment of cardiovascular diseases,” Pahan said. “More research needs to be completed, but the findings of our study have major potential implications for the therapeutic use of aspirin in AD and other dementia-related illnesses.”

Other researchers involved in this study are Sujyoti Chandra, a biochemistry graduate student at Rush, and Malabendu Jana, Ph.D., an assistant professor of neurological sciences at Rush.

The study was funded by the U.S. Department of Veterans Affairs, the Alzheimer’s Association and the National Institutes of Health.

SOURCE: Rush University


Filed Under: Drug Discovery

 

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