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Gender influences symptoms of genetic disorder
Date:2/7/2014

A genetic disorder that affects about 1 in every 2,500 births can cause a bewildering array of clinical problems, including brain tumors, impaired vision, learning disabilities, behavioral problems, heart defects and bone deformities. The symptoms and their severity vary among patients affected by this condition, known as neurofibromatosis type 1 (NF1).

Now, researchers at Washington University School of Medicine in St. Louis have identified a patient's gender as a clear and simple guidepost to help health-care providers anticipate some of the effects of NF1. The scientists report that girls with NF1 are at greater risk of vision loss from brain tumors. They also identified gender-linked differences in male mice that may help explain why boys with NF1 are more vulnerable to learning disabilities.

"This information will help us adjust our strategies for predicting the potential outcomes in patients with NF1 and recommending appropriate treatments," said David H. Gutmann, MD, PhD, the Donald O. Schnuck Family Professor of Neurology, who treats NF1 patients at St. Louis Children's Hospital.

The findings appear online in the Annals of Neurology.

Kelly Diggs-Andrews, PhD, a postdoctoral research associate in Gutmann's laboratory, reviewed NF1 patient data collected at the Washington University Neurofibromatosis (NF) Center. In her initial assessment, Diggs-Andrews found that the number of boys and girls was almost equal in a group of nearly 100 NF1 patients who had developed brain tumors known as optic gliomas. But vision loss occurred three times more often in girls with these tumors.

With help from David Wozniak, PhD, research professor of psychiatry, the scientists looked for an explanation in Nf1 mice (which, like NF1 patients, have a mutation in their Nf1 gene). They found that more nerve cells died in the eyes of female mice, and they linked the increased cell death to low levels of cyclic AMP, a chemical me
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Contact: Michael C. Purdy
314-286-0122
Washington University School of Medicine
Source:Eurekalert

Page: 1 2

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