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BUSM study shows role of cellular protein in regulation of binge eating
Date:6/20/2012

(Boston) Researchers from Boston University School of Medicine (BUSM) have demonstrated in experimental models that blocking the Sigma-1 receptor, a cellular protein, reduced binge eating and caused binge eaters to eat more slowly. The research, which is published online in Neuropsychopharmacology, was led by Pietro Cottone, PhD, and Valentina Sabino, PhD, both assistant professors in the pharmacology and psychiatry departments at BUSM.

Binge eating disorder, which affects approximately 15 million Americans, is believed to be the eating disorder that most closely resembles substance dependence. In binge eating subjects, normal regulatory mechanisms that control hunger do not function properly. Binge eaters typically gorge on "junk" foods excessively and compulsively despite knowing the adverse consequences, which are physical, emotional and social in nature. In addition, binge eaters typically experience distress and withdrawal when they abstain from junk food.

The researchers developed an experimental model of compulsive binge eating by providing a sugary, chocolate diet only for one hour a day while the control group was given a standard laboratory diet. Within two weeks, the group exposed to the sugary diet exhibited binge eating behavior and ate four times as much as the controls. In addition, the experimental binge eaters exhibited compulsive behavior by putting themselves in a potentially risky situation in order to get to the sugary food while the control group avoided the risk.

The researchers then tested whether a drug that blocks the Sigma-1 receptor could reduce binge eating of the sugary diet. The experimental data showed the drug successfully reduced binge eating by 40 percent, caused the binge eaters to eat more slowly and blocked the risky behavior.

The abnormal, risky behavior exhibited by the binge eating experimental group suggested to the researchers that there could be something wrong with how dec
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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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