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Serotonin plays role in many autism cases, studies confirm
Date:2/24/2011

SAN ANTONIO (Feb. 24, 2011) Mouse models are yielding important clues about the nature of autism spectrum disorders, which impact an estimated one in 110 children in the U.S.[1] In labs at the UT Health Science Center San Antonio, researchers are studying strains of mice that inherently mimic the repetitive and socially impaired behaviors present in these disorders.

Georgianna Gould, Ph.D., research assistant professor of physiology in the Graduate School of Biomedical Sciences, is eyeing the role that serotonin plays in autism spectrum disorders.

Serotonin is known for giving a sense of well-being and happiness. It is a neurotransmitter, a chemical that acts like a radio tower in the brain conveying signals among cells called neurons. Thirty percent of autism cases may have a serotonin component.[2]

In a recent paper in the Journal of Neurochemistry, Dr. Gould and colleagues showed that a medication called buspirone improved the social behaviors of mice. Buspirone is approved by the U.S. Food and Drug Administration for use in adults as an anti-anxiety and antidepressant adjuvant medication.

Some genetic variations result in diminished transmission of serotonin between neurons. Buspirone increased transmission by partially mimicking the effects of serotonin at cellular sites called receptors.

Reactions to newly encountered mouse

Social interaction behaviors of the mice were measured by placing them in a three-chamber social interaction test and positioning a "stranger" mouse in one of the chambers. Buspirone-treated mice spent more time in the chamber with the stranger mouse than untreated mice and more time sniffing the stranger.

"No animal model is completely characteristic of humans, and we're far from saying that buspirone is a treatment for behaviors of autistic people," Dr. Gould said. "But this does offer further proof that serotonin is involved in a significant proporti
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Contact: Will Sansom
sansom@uthscsa.edu
210-567-2579
University of Texas Health Science Center at San Antonio
Source:Eurekalert  

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Serotonin plays role in many autism cases, studies confirm
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