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Brain may play key role in blood sugar metabolism and development of diabetes
Date:11/6/2013

A growing body of evidence suggests that the brain plays a key role in glucose regulation and the development of type 2 diabetes, researchers write in the Nov. 7 issue of the journal Nature. If the hypothesis is correct, it may open the door to entirely new ways to prevent and treat this disease, which is projected to affect one in three adults in the United States by 2050.

In the paper, lead author Dr. Michael W. Schwartz, director of the Diabetes and Obesity Center of Excellence at the University of Washington in Seattle, and his colleagues from the Universities of Cincinnati, Michigan, and Munich, note that the brain was originally thought to play an important role in maintaining normal glucose metabolism With the discovery of insulin in the 1920s, the focus of research and diabetes care shifted to almost exclusively to insulin. Today, almost all treatments for diabetes seek to either increase insulin levels or increase the body's sensitivity to insulin.

"These drugs," the researchers write, "enjoy wide use and are effective in controlling hyperglycemia [high blood sugar levels], the hallmark of type 2 diabetes, but they address the consequence of diabetes more than the underlying causes, and thus control rather than cure the disease."

New research, they write, suggests that normal glucose regulation depends on a partnership between the insulin-producing cells of the pancreas, the pancreatic islet cells, and neuronal circuits in the hypothalamus and other brain areas that are intimately involved in maintaining normal glucose levels. The development of diabetes type 2, the authors argue, requires a failure of both the islet-cell system and this brain-centered system for regulating blood sugar levels .

In their paper, the researchers review both animal and human studies that indicate the powerful effect this brain-centered regulatory system has on blood glucose levels independent of the action of insulin. One s
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Contact: Michael McCarthy
mxmc@mac.com
206-543-3620
University of Washington
Source:Eurekalert  

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