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Insulin could be Alzheimer's therapy
Date:4/1/2011

BUFFALO, N.Y. -- A low dose of insulin has been found to suppress the expression in the blood of four precursor proteins involved in the pathogenesis of Alzheimer's disease, according to new clinical research by University at Buffalo endocrinologists. The research, published in March online in the Journal of Clinical Endocrinology and Metabolism, suggests that insulin could have a powerful, new role to play in fighting Alzheimer's disease.

"Our results show clearly that insulin has the potential to be developed as a therapeutic agent for Alzheimer's, for which no satisfactory treatment is currently available," says Paresh Dandona, MD, PhD, UB distinguished professor of medicine in the School of Medicine and Biomedical Sciences and senior author on the study.

One of the four proteins shown in the study to be suppressed by insulin is a precursor to beta amyloid, the main component of plaques considered the hallmark of Alzheimer's disease.

The findings also demonstrate for the first time that the four precursor proteins studied are expressed in peripheral mononuclear cells, white blood cells that are an important component of the immune system.

The paper builds on the UB researchers' earlier work showing that insulin has a potent and rapid anti-inflammatory effect on peripheral mononuclear cells. It also builds on the well-known association between obesity, type 2 diabetes and chronic low-grade inflammation, as well as insulin resistance, all conditions that manifest a significantly increased prevalence of Alzheimer's disease.

In the study, 10 obese, type 2 diabetic patients were infused with two 100 ml units of insulin per hour over a period of four hours. The patients were all taking oral drugs to treat their diabetes; none of them were taking insulin or any antioxidant or nonsteroidal anti-inflammatory drugs. The control group received 5 percent dextrose per hour or normal saline solution.

The low-dose insulin was found to s
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Contact: Ellen Goldbaum
goldbaum@buffalo.edu
716-645-4605
University at Buffalo
Source:Eurekalert  

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