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Earlier detection of bone loss may be in future
Date:5/28/2012

TEMPE, Ariz. Are your bones getting stronger or weaker? Right now, it's hard to know. Scientists at Arizona State University and NASA are taking on this medical challenge by developing and applying a technique that originated in the Earth sciences. In a new study, this technique was more sensitive in detecting bone loss than the X-ray method used today, with less risk to patients. Eventually, it may find use in clinical settings, and could pave the way for additional innovative biosignatures to detect disease.

"Osteoporosis, a disease in which bones grow weaker, threatens more than half of Americans over age 50," explained Ariel Anbar, a professor in ASU's Department of Chemistry and Biochemistry and the School of Earth and Space Exploration, and senior author of the study.

"Bone loss also occurs in a number of cancers in their advanced stages. By the time these changes can be detected by X-rays, as a loss of bone density, significant damage has already occurred," Anbar said. "Also, X-rays aren't risk-free. We think there might be a better way."

With the new technique, bone loss is detected by carefully analyzing the isotopes of the chemical element calcium that are naturally present in urine. Isotopes are atoms of an element that differ in their masses. Patients do not need to ingest any artificial tracers and are not exposed to any radiation, so there is virtually no risk, the authors noted.

The findings are presented in a paper published in the online Early Edition of the Proceedings of the National Academy of Sciences (PNAS) the week of May 28. It is titled "Rapidly assessing changes in bone mineral balance using natural stable calcium isotopes."

"The paper suggests an exciting new approach to the problem," said Dr. Rafael Fonseca, chair of the Department of Medicine at the Mayo Clinic in Arizona, and a specialist in the bone-destroying disease multiple myeloma. Fonseca was not associated wit
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Contact: Carol Hughes
carol.hughes@asu.edu
480-965-6375
Arizona State University
Source:Eurekalert  

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