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Study links enzyme to autistic behaviors
Date:7/23/2014

RIVERSIDE, Calif. Fragile X syndrome (FXS) is a genetic disorder that causes obsessive-compulsive and repetitive behaviors, and other behaviors on the autistic spectrum, as well as cognitive deficits. It is the most common inherited cause of mental impairment and the most common cause of autism.

Now biomedical scientists at the University of California, Riverside have published a study that sheds light on the cause of autistic behaviors in FXS. Appearing online today (July 23) in the Journal of Neuroscience, and highlighted also on the cover in this week's print issue of the journal, the study describes how MMP-9, an enzyme, plays a critical role in the development of autistic behaviors and synapse irregularities, with potential implications for other autistic spectrum disorders.

MMP-9 is produced by brain cells. Inactive, it is secreted into the spaces between cells of the brain, where it awaits activation. Normal brains have quite a bit of inactive MMP-9, and the activation of small amounts has significant effects on the connections between neurons, called synapses. Too much MMP-9 activity causes synapses in the brain to become unstable, leading to functional deficits.

"Our study targets MMP-9 as a potential therapeutic target in Fragile X and shows that genetic deletion of MMP-9 favorably impacts key aspects of FXS-associated anatomical alterations and behaviors in a mouse model of Fragile X," said Iryna Ethell, a professor of biomedical sciences in the UC Riverside School of Medicine, who co-led the study. "We found that too much MMP-9 activity causes synapses to become uns
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Contact: Iqbal Pittalwala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
Source:Eurekalert  

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