Epigenetics of autism

Autism spectrum disorder (ASD) includes autism, Asperger disorder, childhood disintegrative disorder and pervasive developmental disorder not otherwise specified. While the exact cause of ASD has remained somewhat of a mystery, it appears to be genetic in origin. Most data supports a polygenic, epistatic model, meaning that the disorder is caused by two or more genes and that those genes are interacting in a complex manner. Several genes, between two and fifteen in number, have been identified and could potentially contribute to disease susceptibility. However, an exact determination of the cause of ASD has yet to be discovered and there probably is not one single genetic cause of any particular set of disorders, leading many researchers to believe that epigenetic mechanisms, such as genom

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