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Disease that stunts infants' growth traced to same gene that makes kids grow too fast
Date:5/29/2012

UCLA geneticists have identified the mutation responsible for IMAGe syndrome, a rare disorder that stunts infants' growth. The twist? The mutation occurs on the same gene that causes BeckwithWiedemann syndrome, which makes cells grow too fast, leading to very large children.

Published in the May 27 edition of the journal Nature Genetics, the UCLA findings could lead to new ways of blocking the rapid cell division that allows tumors to grow unchecked. The discovery also offers a new tool for diagnosing children with IMAGe syndrome, which until now has been difficult to identify accurately.

The discovery holds special significance for principal investigator Dr. Eric Vilain, a professor of human genetics, pediatrics and urology at the David Geffen School of Medicine at UCLA.

Nearly 20 years ago, as a medical resident in his native France, Vilain cared for two boys, ages 3 and 6, who were dramatically short for their ages. Though unrelated, the children shared a mysterious malady marked by minimal fetal development, stunted bone growth, sluggish adrenal glands, and undersized organs and genitals.

"I never found a reason to explain these patients' unusual set of symptoms," said Vilain, who also directs the UCLA Institute for Society and Genetics. "I've been searching for the cause of their disease since 1993."

When Vilain joined UCLA as a genetics fellow, the two cases continued to intrigue him. His UCLA mentor at the time, geneticist Dr. Edward McCabe, recalled a similar case from his previous post at Baylor College of Medicine. The two of them obtained blood samples from the three cases and analyzed the patients' DNA for mutations in suspect genes but uncovered nothing.

Vilain and McCabe approached the Journal of Clinical Endocrinology and Metabolism and in 1999 published the first description of the syndrome, which they dubbed IMAGe, an acronym of sorts for the condition's symptoms: intraut
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Contact: Elaine Schmidt
eschmidt@mednet.ucla.edu
310-794-2272
University of California - Los Angeles
Source:Eurekalert

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