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Study finds fat and bone mass are genetically linked
Date:3/11/2013

When it comes to body shape, diet and exercise can only take us so far. Our body shape and geometry are largely determined by genetic factors. Genetics also have an impact on our body composition including soft fat tissue and hard bone tissue and can lead to excess fat or osteoporosis.

Now Prof. Gregory Livshits of Tel Aviv University's Department of Anatomy and Anthropology at the Sackler Faculty of Medicine, working alongside Dr. Michael Korostishevsky, has uncovered a clear genetic link between fat and bone mass. These factors, which contribute to bone metabolism, also affect Body Mass Index (BMI), which often serves as an indicator of overall health.

Reported in the journal Bone, this finding is a step towards understanding how these tissues are inter-related on a biological level, and will help doctors develop better treatment plans for patients dealing with fat or bone related pathologies. "When a patient is prescribed a medication, it is always important to know the potential side effects," says Prof. Livshits. As a result of this genetic connection, "a medication that is prescribed to treat obesity might have a negative impact on skeletal health," he says.

Connections forged in fat and bone

Previous studies revealed that osteocalcin, a protein produced by bone cells, has an impact not only on bone but also on fat tissue metabolism. The protein's function is associated with bone formation and bone mineralization. But recent data suggest that osteocalcin is also involved in the regulation of glucose and fat metabolism and that osteocalcin levels are lower in obese and overweight individuals. Prof. Livshits and Dr. Korostishevsky set out to determine the underlying mechanism of this osteocalcin link whether it was purely environmental or had a genetic basis.

The researchers conducted their study on a European population called the Chuvasha descendants of Bulgarian tribes that have lived along
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Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert

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