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PMID: 17127035 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Shared executive dysfunctions in unaffected relatives of patients with autism and obsessive-compulsive disorder.

Delorme R, Goussé V, Roy I, Trandafir A, Mathieu F, Mouren-Siméoni MC, Betancur C, Leboyer M

Abstract

Executive dysfunctions have been studied as a potential endophenotype associated with the genetic basis of autism. Given that recent findings from clinical and molecular genetic studies suggest that autism and obsessive-compulsive disorder (OCD) could share a common pattern of heritability, we assessed executive functions as a possible common cognitive endophenotype in unaffected family members of individuals with either autism or OCD. Five tests assessing executive functions (Tower of London, verbal fluency, design fluency, trail making and association fluency) were proposed to 58 unaffected first-degree relatives (parents and siblings) of probands with autism and 64 unaffected first-degree relatives of OCD patients. Results were compared with those of 47 healthy controls matched for age, sex, and level of education. In the Tower of London test, both groups of unaffected relatives showed significantly lower scores and longer response times compared with controls. No differences were observed between autism and OCD relatives and healthy controls in the four other tasks (verbal fluency, design fluency, trail making test and association fluency). Our findings show the existence of executive dysfunction in the unaffected first-degree relatives of probands with OCD, similar to those observed in the relatives of patients with autism. These results support and extend previous cognitive studies on probands indicating executive dysfunctions in autism and OCD. Planning and working memory processes could thus represent a common cognitive endophenotype in autism and OCD that could help in the identification of genes conferring vulnerability to these disorders.

MeSH Terms
Adolescent Adult Autistic Disorder/diagnosis,genetics,psychology Child Cognition Disorders/diagnosis,genetics,psychology Educational Status Family/psychology Female Humans Male Neuropsychological Tests/statistics & numerical data Obsessive-Compulsive Disorder/diagnosis,genetics,psychology Parents/psychology Psychiatric Status Rating Scales/statistics & numerical data Reference Values Siblings/psychology
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Delorme Richard
INSERM U513, Neurobiologie et Psychiatrie, Université Paris XII, Créteil, France. [email protected]
Goussé Véronique
Roy Isabelle
Trandafir Anca
Mathieu Flavie
Mouren-Siméoni Marie-Christine
Betancur Catalina
Leboyer Marion
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Article Info
Journal
European psychiatry : the journal of the Association of European Psychiatrists
Abbr.
Eur Psychiatry
ISSN
0924-9338
Published
2007-01-00
Epub
2006-00-28
Pages
32-8
Language
English
Region
England
NLM ID
9111820
PMCID
PMC1894853
Subset
IM
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