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The Creatine Transporter Gene Paralogous at 16p11.2 Is Expressed in Human Brain

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Author(s): Nadia Bayou | Ridha M'rad | Ahlem Belhaj | Hussein Daoud | Ramzi Zemni | Sylvain Briault | M. Béchir Helayem | Lamia Ben Jemaa | Habiba Chaabouni

Journal: Comparative and functional genomics.
ISSN 1531-6912

Volume: 2008;
Date: 2008;
Original page

ABSTRACT
Autism is a complex neurodevelopmental disorder characterized by impairment of social interaction, language, communication, and stereotyped, repetitive behavior. Genetic predisposition to autism has been demonstrated in families and twin studies. About 5–10% of autism cases are associated with chromosomal abnormalities or monogenic disorders. The identification of genes involved in the origin of autism is expected to increase our understanding of the pathogenesis. We report on the clinical, cytogenetic, and molecular findings in a boy with autism carrying a de novo translocation t(7;16)(p22.1;p11.2). The chromosome 16 breakpoint disrupts the paralogous SLC6A8 gene also called SLC6A10 or CT2. Predicted translation of exons and RT-PCR analysis reveal specific expression of the creatine transporter paralogous in testis and brain. Several studies reported on the role of X-linked creatine transporter mutations in individuals with mental retardation, with or without autism. The existence of disruption in SLC6A8 paralogous gene associated with idiopathic autism suggests that this gene may be involved in the autistic phenotype in our patient.
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