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Bees shed light on human sweet perception and metabolic disorders
Date:6/29/2012

TEMPE, Ariz. Scientists at Arizona State University have discovered that honey bees may teach us about basic connections between taste perception and metabolic disorders in humans. By experimenting with honey bee genetics, researchers have identified connections between sugar sensitivity, diabetic physiology and carbohydrate metabolism. Bees and humans may partially share these connections.

In a study published in the open-access journal PLoS Genetics (Public Library of Science), Gro Amdam, an associate professor, and Ying Wang, a research scientist, in the School of Life Sciences in ASU's College of Liberal Arts and Sciences, explain how for the first time, they've successfully inactivated two genes in the bees' "master regulator" module that controls food-related behaviors. By doing so, researchers discovered a possible molecular link between sweet taste perception and the state of internal energy.

"A bee's sensitivity to sugar reveals her attitude towards food, how old the bee is when she starts searching for nectar and pollen, and which kind of food she prefers to collect," said Wang, lead author of the paper. "By suppressing these two 'master' genes, we discovered that bees can become more sensitive to sweet taste. But interestingly, those bees also had very high blood sugar levels, and low levels of insulin, much like people who have Type 1 diabetes."

In Amdam's honey bee lab at ASU, scientists suppressed two genes including vitellogenin, which is similar to a human gene called apolipoprotein B, and ultraspiracle, which partners with an insect hormone that has some functions in common with the human thyroid hormone. The team is the first in the world to accomplish this double gene-suppressing technique. Researchers used this method to understand how the master regulator works.

"Now, if one can use the bees to understand how taste perception and metabolic syndromes are connected, it's a very useful tool,"
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Contact: Sandra Leander
sandra.leander@asu.edu
480-965-9865
Arizona State University
Source:Eurekalert  

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