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Researchers identify a mechanism linking bariatric surgery to health benefits
Date:4/22/2014

Bariatric surgery has positive effects not only on weight loss but also on diabetes and heart disease. Researchers at the Sahlgrenska Academy and University of Cincinnati have shown that the health benefits are not caused by a reduction in the stomach size but by increased levels of bile acids in the blood. These findings, reported in Nature, indicate that bile acids could be a new target for treating obesity and diabetes.

Previous research from the Sahlgrenska Academy has demonstrated that obesity surgery is the only effective treatment for obesity and obesity-related diabetes.

However, the mechanisms that cause the positive effects have been unclear.

Positive effects caused by bile acids

Professor Fredrik Bckhed, in collaboration with Randy Seeley and coworkers from the University of Cincinnati in the US, has shown that the positive effects of bariatric surgery are likely caused by the surgery-induced increase in bile acids. The study, which is published online in the leading science journal Nature, focuses on a specific receptor called FXR, which is involved in bile acid signaling.

"Our study shows that signaling through FXR is essential for the beneficial effects of the surgery to be achieved. This is a major breakthrough in understanding how bariatric surgery affects metabolism and in the development of new treatment strategies", says Fredrik Bckhed.

Important future complement

The prevalence of obesity is increasing worldwide and it is not realistic to operate on all obese subjects. Furthermore, bariatric surgery is associated with a risk of complications. Treatment strategies based on the FXR receptor could therefore be an important future therapeutic approach.

Improves glucose metabolism

In this study, mice with or without the FXR gene underwent an operation termed vertical sleeve gastrectomy (VSG) in which approxima
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Contact: Fredrik Bäckhed
fredrik.backhed@wlab.gu.se
46-702-182-355
University of Gothenburg
Source:Eurekalert  

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