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Utah researchers confirm chromosome may harbor autism gene

Using technology that allows DNA from thousands of genes to be collected and surveyed on a 3 x 1-inch chip, University of Utah medical researchers have confirmed that a region on a single chromosome probably harbors a gene that causes autism. The researchers at the U School of Medicine made the finding by tracing variations in the DNA of an extended Utah family that has a high occurrence of the disorder and whose members are descended from one couple.

As part of the study, the researchers also ruled out one gene that appeared to be a good candidate for being linked to autism. They're now looking at other genes for a connection to the disorder.

Published in Human Heredity online, the study is part of the Utah Autism Research Project. The researchers are interested in finding more families with a history of autism to join the study.

The just-published research confirms Finnish studies of families that linked autism to the same region on chromosome 3, according to principal author Hilary Coon, Ph.D., research associate professor of psychiatry. In fact, the results of the U of U research were surprisingly similar to the Finnish studies, Coon said.

"It was remarkable to confirm the Finnish studies," she said. "Our results were so close to their evidence, we thought it was important."

Autism is a behavioral disorder that strikes before age 3 and is characterized by impaired ability in social interactions and communication. Those with autism also display repetitive behaviors and interests.

The study involved 31 members of a family of Northern European ancestry, seven of whom have autism or an autism-related disorder. The family members are part of the Utah Population Database, a computerized set of the genealogies of 170,000 Utah families comprising 1.6 million people. Information on some families goes back to the state's pioneer founders.

The researchers used a gene chip similar to a microarray to search for genet
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Contact: Phil Sahm
Phil.Sahm@hsc.utah.edu
University of Utah Health Sciences Center
17-Jan-2006


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