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Red Wine a Weapon in Battle of the Bulge

Health Benefits of Resveratrol May Include Fighting Fat, Study Shows
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WebMD Health News
Reviewed by Louise Chang, MD

June 17, 2008 -- An antioxidant found in red wine and grapes known as resveratrol -- already thought to help keep the heart healthy and ward off cancer -- may also turn out to be a fat fighter, according to new research.

In the laboratory, exposure to resveratrol prevented pre-fat cells, termed pre-adipocytes, from increasing and from converting into mature fat cells, according to Martin Wabitsch, MD, PhD, a researcher from the University of Ulm in Ulm, Germany. Wabitsch presented the findings this week at ENDO 08, The Endocrine Society's 90th annual meeting in San Francisco.

"We have to show it works in the same way in human beings," Wabitsch tells WebMD.

The hope, he says, is to continue the research and, if it bears out, develop drugs that will use the same mechanism as the resveratrol in controlling the fat cells.

Health Benefits of Resveratrol: Study Details

In previous research, Wabitsch and his colleagues had found that the resveratrol protected lab mice fed a high-calorie diet from the health problems brought on by obesity by mimicking the effects of caloric restriction.

So the next step, they thought, was to see if the substance could mimic the effects of caloric restriction in human fat cells by changing them.

"We used a human fat cell strain," Wabitsch says, a stable cell strain that can be used over and over in the laboratory.

They exposed some fat cells to resveratrol and did not expose a comparison group of fat cells to the antioxidant. "Forty hours is the normal doubling time [of pre-fat cells]," Wabitsch says. "At 48 hours, the pre-fat cells in the control dish had more than doubled. In the resveratrol dish, the number of pre-fat cells had decreased by 40% to 45%," he tells WebMD.

The volume of fat cells exposed to the resveratrol was also less, he says, in effect producing skinnier fat cells. Exposure to the resveratrol also reduced the secretion of substances called interleukin 6 and 8, which may be linked to the development of diabetes and clogged arteries, both thought to be obesity-related problems.

Wabitsch says the finding is consistent with the theory that red wine's resveratrol explains the so-called French paradox -- the observation that French people, who eat a relatively high-fat diet but enjoy their red wine, have a low death rate from heart disease.

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