Identification of genomic deletions spanning the PCDH19 gene in two unrelated girls with intellectual disability and seizures.
Clin Genet
; 82(6): 540-5, 2012 Dec.
Article
en En
| MEDLINE
| ID: mdl-22091964
ABSTRACT
Recently, missense and truncating mutations in the gene PCDH19 have been reported to cause female-restricted epilepsy with mental retardation (EFMR). EFMR (MIM#300088) is an X-linked disorder characterized by early onset seizures and intellectual disability (ID). Interestingly, unlike typical X-linked mode of inheritance, the phenotype is restricted to females, and males are unaffected carriers. PCDH19 is highly expressed in brain, and the encoded protein belongs to the cadherin superfamily. Here we report two unrelated female patients with deletions spanning PCDH19 identified by copy number variation (CNV) analysis and validated by qPCR. In one, we have identified a 3 Mb interstitial deletion at Xq21.33-q22.1 which spans PCDH19, LOC442459 & TNMD. This patient had her first seizure at 8 months old, and also has ID and aggressive behavior. In another female patient we identified a de novo 603 kb heterozygous deletion in a female patient with fits (since 1 year of age), ID, hyperactivity and aggressive behavior. The deletion spans the entire PCDH19 gene (also TNMD, SRPX2, TSPAN6 and SYTL4). In conclusion, our results suggest that deletions at PCDH19 also cause EFMR.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Convulsiones
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Anomalías Múltiples
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Cadherinas
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Eliminación de Secuencia
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Enfermedades Genéticas Ligadas al Cromosoma X
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Discapacidad Intelectual
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Female
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Humans
Idioma:
En
Revista:
Clin Genet
Año:
2012
Tipo del documento:
Article
País de afiliación:
Canadá