Immune system protein tied to weight loss.
Interleukin-18 is a protein which plays an active part of the immune system.
A team led by Eric Zorrilla, an assistant professor at The Scripps Research Institute in San Diego was studying the protein when they noticed that something unusual occurred in mice genetically engineered to lack the protein.
The mice got fat.
Mice without the protein overate and became fatter than the other mice, the researchers found.
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