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Low Levels of Brain Chemical May Lead to Obesity

By R&D Editors | August 28, 2008

A brain chemical that plays a role in long term memory also appears to be involved in regulating how much people eat and their likelihood of becoming obese, according to a National Institutes of Health study of a rare genetic condition.

Brain derived neurotrophic factor (BDNF) is, as its name implies, produced in the brain. Studies of laboratory animals have suggested it also helps control appetite and weight. The NIH study, appearing in the New England Journal of Medicine, provides the first strong evidence that BDNF is important for body weight in human beings as well.

The NIH researchers studied children and adults with WAGR syndrome, a rare genetic condition. The researchers found that some of the people with this syndrome lack a gene for BDNF and have correspondingly low blood levels of the substance. The people in this subgroup also have unusually large appetites and a strong tendency towards obesity.

“This is a promising new lead in the search for biological pathways that contribute to obesity,” said Duane Alexander, M.D., director of the NIH’s Eunice Kennedy Shriver National Institute of Child Health and Human Development. “This finding may eventually lead to the development of new drugs to regulate appetite in people who have not had success with other treatments.”

Release date: August 27, 2008
Source: National Institutes of Health 

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