Scientists revealed the most extensive findings to date on the genetics of autism, pinpointing two new genetic links that may predispose children to develop the complex brain disorder. The five-year study, led by international researchers from 19 nations, indicated autism had numerous genetic origins rather than a single or a few primary causes. The study incriminated a gene called neurexin 1 involved with glutamate, a brain chemical previously implicated in autism that plays a role in early brain development, as a possible susceptibility gene for autism. A previously unidentified region of chromosome 11 also was implicated. Autism is a spectrum of disorders apparently stemming from genetic and environmental causes. Geneticist Stephen Scherer of the University of Toronto and the Hospital for Sick Children in Toronto said 90 percent of autism may have a genetic basis. child-autism-parent-cafe.com
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