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BUSM study identifies receptor's role in regulating obesity, type 2 diabetes
Date:7/26/2012

(Boston) A recent study led by Boston University School of Medicine (BUSM) demonstrates that the A2b-type adenosine receptor, A2bAR, plays a significant role in the regulation of high fat, high cholesterol diet-induced symptoms of type 2 diabetes. The findings, which are published online in PLoS ONE, also identify A2bAR as a potential target for the treatment of type 2 diabetes.

Katya Ravid, DSc/PhD, professor of medicine and biochemistry and director of the Evans Center for Interdisciplinary Biomedical Research at BUSM, led this study. Colleagues from Ravid's lab who collaborated on this research include Hillary Johnston-Cox, BSc (MD/PhD, 2014) and Milka Koupenova-Zamor, PhD. Noyan Gokce, MD, associate professor of medicine at BUSM, and Melissa Farb, PhD, a postdoctoral fellow at BUSM, also collaborated on the study.

Diets that are high in fat and cholesterol induce changes in how the body regulates blood glucose levels. Exercise induces an increased production adenosine, a metabolite produced naturally by cells. A2bAR, a naturally occurring protein receptor found in the cell membrane, is activated by adenosine. This receptor is known to play an important role in regulating inflammation, which is associated with type 2 diabetes and obesity.

To examine the association of A2bAR activation with a diet high in fat and cholesterol, the researchers used an experimental model that lacked A2bAR and compared the results with a control group. When the experimental model group was given a diet high in fat and cholesterol, there was an increase in the development of obesity and signs of type 2 diabetes. The signs demonstrated in the study included elevated blood glucose levels and increased in insulin levels. When the control group was given the same diet, however, the levels of A2bAR increased, resulting in decreased insulin and glucose levels and obesity.

A novel link also was identified between the expression of A2bAR, ins
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Contact: Jenny Eriksen Leary
jenny.eriksen@bmc.org
617-638-6841
Boston University Medical Center
Source:Eurekalert

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