Modifier effects in autism at the MAO-A and DBH loci.
Am J Med Genet B Neuropsychiatr Genet
; 126B(1): 58-65, 2004 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-15048649
ABSTRACT
Autism is one of a group of pervasive developmental disorders (PDD) characterized by qualitative impairments in reciprocal social communication and by a preference for repetitive, stereotyped activities, interests, and behaviors. The disorder is caused in large part by genetic mechanisms, though no disease genes have yet been identified. The objective of this study was to investigate three markers, two in the DBH gene and one in the MAO-A gene, for maternal or fetal modifier effects on level of functioning (IQ). At the same time, the possibility of maternal or fetal susceptibility effects was also examined. We assembled 67 affected sibpairs and 45 singletons and determined allele frequencies at the three markers among the affected children and first degree relatives. Sizeable and significant modifier effects were found at the MAO locus and, to a lesser extent, at the DBH locus. Susceptibility effects were also found but not without qualification. We conclude that maternal genotypes at the MAO-A locus, and possibly at the DBH one, may modify IQ in children with autism through the intrauterine environment.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Trastorno Autístico
/
Dopamina beta-Hidroxilasa
/
Inteligencia
/
Monoaminooxidasa
Tipo de estudio:
Qualitative_research
Límite:
Child
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Female
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Humans
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Male
Idioma:
En
Revista:
Am J Med Genet B Neuropsychiatr Genet
Asunto de la revista:
GENETICA MEDICA
/
NEUROLOGIA
/
PSIQUIATRIA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Estados Unidos