Original article| Volume 40, ISSUE 6, P457-464, September 15, 1996

X chromosome and infantile autism

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      Family studies and epidemiologic data in autism show the involvement of genetic factors in the etiology of this syndrome. The frequent association of X chromosome with mental retardation and behavior disturbances raises the question of its implication in the etiology of autism. Several markers of X chromosome were tested in autistic and control populations by association study. The autistic population was submitted to an extensive clinical examination. For the DXS287 marker, χ2 analysis showed a different allele distribution between control and patient groups. This difference was enhanced when children with the most severe autistic behaviors and the least serious cognitive disorders were selected for statistical comparison. To our knowledge, this is the first association study described using markers of X chromosome in infantile autism. These preliminary results encourage our research on this chromosome, which could be considered as a significant genetic component of the multifactorial etiology of autism.

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