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Serotonin Could Play a Large Role in Bone Loss, University of Cincinnati Study
2/22/2012 7:37:06 AM
Scientists have long known that calcium leaches from the bones both during lactation and in certain types of cancer. The driver behind these phenomena is a molecule called parathyroid hormone related protein (PTHrP), which is secreted by the mammary glands. The signal that regulates the secretion of PTHrP, and where this other unknown molecule exerts its influence, has remained a mystery. Now, in a new study using cells and tissues from mice, cows, and people, a team of researchers at the University of Cincinnati have identified this mystery molecule as serotonin, a neurotransmitter most often recognized for its role in happiness and well-being. The scientists also identified the specific receptor that serotonin acts on in mammary tissue. Understanding these two findings more deeply could lead to better ways to combat bone loss, potentially by using drugs that affect serotonin signaling.
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