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Researchers report new autism genes discovered
Date:6/9/2010

University of Illinois at Chicago researchers are part of an international consortium working with Autism Speaks, the world's largest autism science and advocacy organization, which today reports new autism genetic discoveries.

The results, from the second phase of the collaborative Autism Genome Project, are published in the June 10 issue of the journal Nature.

Autism is a complex neurobiological disorder that inhibits a person's ability to communicate and develop social relationships, and is often accompanied by behavioral challenges. Autism spectrum disorders are diagnosed in one in 110 children in the U.S., affecting four times as many boys as girls.

The new report shows that individuals with autism tend to carry more sub-microscopic insertions and deletions called copy-number variants (CNV) in their genome than nonautistic people do. Some of these CNV appeared to be inherited, while others are considered new because they are found only in affected offspring and not in the parents. Taken together, more of the CNVs disrupt genes previously reported to be implicated in intellectual disability without autism or in autism than expected by chance.

The findings are based on analysis of high-density genotyping data collected from 1,000 individuals with autism spectrum disorder (ASD) and 1,300 without ASD.

The new study also identified new autism susceptibility genes including SHANK2, SYNGAP1, DLGAP2 and the X-linked DDX53PTCHD1 locus. Some of these genes belong to synapse-related pathways, while others are involved in cellular proliferation, projection and motility, and intracellular signaling, functional targets that may lead to the development of new treatment approaches.

These findings further support an emerging consensus within the scientific community that autism is caused in part by many "rare variants" or genetic changes found in less than 1 percent of the population. While each of these varian
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Contact: Sherri McGinnis Gonzlez
smcginn@uic.edu
312-996-8277
University of Illinois at Chicago
Source:Eurekalert

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