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J Clin Invest. 2009 Apr;119(4):747-54. doi: 10.1172/JCI37934. Epub 2009 Apr 1.

The genetic and neurobiologic compass points toward common signaling dysfunctions in autism spectrum disorders.

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  • 1Vanderbilt Kennedy Center for Research on Human Development and Department of Pharmacology,Vanderbilt University Medical Center, Nashville, Tennessee, USA. plevitt@usc.edu


Autism spectrum disorder (ASD) is a common neurodevelopmental disorder with high heritability. Here, we discuss data supporting the view that there are at least two distinct genetic etiologies for ASD: rare, private (de novo) single gene mutations that may have a large effect in causing ASD; and inherited, common functional variants of a combination of genes, each having a small to moderate effect in increasing ASD risk. It also is possible that a combination of the two mechanisms may occur in some individuals with ASD. We further discuss evidence from individuals with a number of different neurodevelopmental syndromes, in which there is a high prevalence of ASD, that some private mutations and common variants converge on dysfunctional ERK and PI3K signaling, which negatively impacts neurodevelopmental events regulated by some receptor tyrosine kinases.

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