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Salk scientists redraw the blueprint of the body's biological clock
Date:4/6/2012

enes BMAL1 activates.

"We thought that the core of the clock was an accelerator, and that all REV-ERBα and REV-ERBβ did was to pull the foot off that pedal," says Evans. "What we've shown is that these receptors act directly as a break to slow clock activity. Now we've got a accelerator and a break, each equally important in creating the daily rhythm of the clock."

The scientists also found that the REV-ERBs control the activity of hundreds of genes involved metabolism, including those responsible for controlling levels of fats and bile. The mice in which REV-ERBα and REV-ERBβ were turned off had high levels of fat and sugar in their blood ---- common problems in people with metabolic disorders.

"This explains how our cellular metabolism is tied to daylight cycles determined by the movements of the sun and the earth," says Satchidananda Panda, an associate professor in Salk's Regulatory Biology Laboratory and co-author on the paper. "Now we want to find ways of leveraging this mechanism to fix a person's metabolic rhythms when they are disrupted by travel, shift work or sleep disorders."


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Contact: Andy Hoang
Ahoang@salk.edu
619-861-5811
Salk Institute
Source:Eurekalert  

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