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University of Utah and Harvard researchers take major step toward first biological test for autism
Date:12/2/2010

BELMONT, MAResearchers at Harvard-affiliated McLean Hospital and the University of Utah have developed the best biologically based test for autism to date. The test was able to detect the disorder in individuals with high-functioning autism with 94 percent accuracy. The study will be published online the week of November 29th in Autism Research.

The test, which uses MRI to measure deviations in brain circuitry, could someday replace the subjective test now used to identify those with the disorder. It could also lead to a better understanding of autism and to better management and treatments of affected individuals.

"This is not yet ready for prime time use in the clinic yet, but the findings are the most promising thus far," said lead author Nicholas Lange, ScD, Associate Professor of Psychiatry at Harvard Medical School and director of the Neurostatistics Laboratory at McLean. "Indeed, we have new ways to discover more about the biological basis of autism and how to improve the lives of individuals with the disorder," said senior author Janet Lainhart, MD, Principal Investigator of the research at the University of Utah.

The Harvard-McLean and University of Utah researchers used the test on two groups of subjects. One group consisted of individuals who had previously been diagnosed with high-functioning autism using the standard subjective scoring system. That system is based on assessing patients and questioning their parents about their functionality in a variety of areas including language, social functioning, and behavior. The second group studied was a control group consisting of normally developing individuals.

The subjects were put in an MRI scanner that was programmed to be sensitive to water diffusion along the axons of the brain to measure microscopic features of the brain's circuitry. The Lange-Lainhart test employs Diffusion Tensor Imaging.

"It provides pictures and measurements of the microscopic fiber structures o
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Contact: Adriana Bobinchock
abobinchock@partners.org
617-855-2110
McLean Hospital
Source:Eurekalert

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