期刊
BIOLOGICAL PSYCHIATRY
卷 69, 期 9, 页码 898-901出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.biopsych.2010.11.015
关键词
Autism; de novo mutation; epilepsy; intellectual disability; mental retardation; SYNGAP1
资金
- Canadian Institute of Health Research
- Reseau de Genetique Medicale Appliquee/Fonds de la Recherche en Sante du Quebec
- Genome Canada
- Genome Quebec
- Universite de Montreal
- CIHR (Institute of Genetics)
- Fonds de la Recherche en Sante du Quebec
Background: Little is known about the genetics of nonsyndromic intellectual disability (NSID). Recently, we reported de novo truncating mutations in the SYNGAP1 gene of 3 of 94 NSID cases, suggesting that its disruption represents a common cause of autosomal dominant NSID. Methods: To further explore the involvement of SYNGAP1 in NSID, we sequenced its exons and intronic boundaries in 60 additional sporadic cases of NSID, including 30 patients with autism spectrum disorders (ASD) and 9 with epilepsy, and in 380 control individuals. Results: We identified de novo out-of-frame deletions in two patients with NSID and mild generalized epilepsy (c.2677delC/p.Q893RfsX184 and c.321_324delGAAG/p.K108VfsX25) and a de novo splicing mutation (c.2294 + 1G>A), which results in the creation of a premature stop codon, in a patient with NSID and autism. No splicing or truncating mutations were found in control subjects. Conclusions: We provide evidence that truncating mutations in SYNGAP1 are common in NSID and can be also associated with autism.
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