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09-01-2017 | Original Paper | Uitgave 3/2017 Open Access

Journal of Autism and Developmental Disorders 3/2017

Developmental Markers of Genetic Liability to Autism in Parents: A Longitudinal, Multigenerational Study

Tijdschrift:
Journal of Autism and Developmental Disorders > Uitgave 3/2017
Auteurs:
Molly Losh, Gary E. Martin, Michelle Lee, Jessica Klusek, John Sideris, Sheila Barron, Thomas Wassink

Abstract

Genetic liability to autism spectrum disorder (ASD) can be expressed in unaffected relatives through subclinical, genetically meaningful traits, or endophenotypes. This study aimed to identify developmental endophenotypes in parents of individuals with ASD by examining parents’ childhood academic development over the school-age period. A cohort of 139 parents of individuals with ASD were studied, along with their children with ASD and 28 controls. Parents’ childhood records in the domains of language, reading, and math were studied from grades K-12. Results indicated that relatively lower performance and slower development of skills (particularly language related skills), and an uneven rate of development across domains predicted ASD endophenotypes in adulthood for parents, and the severity of clinical symptoms in children with ASD. These findings may mark childhood indicators of genetic liability to ASD in parents, that could inform understanding of the subclinical expression of ASD genetic liability.

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