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A common cognitive, psychiatric, and dysmorphic phenotype in carriers of NRXN1 deletion

Deletions in the 2p16.3 region that includes the neurexin (NRXN1) gene are associated with intellectual disability and various psychiatric disorders, in particular, autism and schizophrenia. We present three unrelated patients, two adults and one child, in whom we identified an intragenic 2p16.3 deletion within the NRXN1 gene using an oligonucleotide comparative genomic hybridization array. The three patients presented dual diagnosis that consisted of mild intellectual disability and autism and bipolar disorder. Also, they all shared a dysmorphic phenotype characterized by a long face, deep set eyes, and prominent premaxilla. Genetic analysis of family members showed two inherited deletions. A comprehensive neuropsychological examination of the 2p16.3 deletion carriers revealed the same phenotype, characterized by anxiety disorder, borderline intelligence, and dysexecutive syndrome. The cognitive pattern of dysexecutive syndrome with poor working memory and reduced attention switching, mental flexibility, and verbal fluency was the same than those of the adult probands. We suggest that in addition to intellectual disability and psychiatric disease, NRXN1 deletion is a risk factor for a characteristic cognitive and dysmorphic profile. The new cognitive phenotype found in the 2p16.3 deletion carriers suggests that 2p16.3 deletions might have a wide variable expressivity instead of incomplete penetrance

© Molecular Genetics and Genomics, 2014 (August 18), 10 p.

Springer Verlag

Author: Viñas Jornet, Marina
Esteba Castillo, Susanna
Gabau, Elisabeth
Ribas Vidal, Núria
Baena, Neus
San Molina, Juan Lorenzo
Ruiz, Anna
Coll, Maria Dolors
Novell, Ramon
Guitart, Miriam
Date: 2014
Abstract: Deletions in the 2p16.3 region that includes the neurexin (NRXN1) gene are associated with intellectual disability and various psychiatric disorders, in particular, autism and schizophrenia. We present three unrelated patients, two adults and one child, in whom we identified an intragenic 2p16.3 deletion within the NRXN1 gene using an oligonucleotide comparative genomic hybridization array. The three patients presented dual diagnosis that consisted of mild intellectual disability and autism and bipolar disorder. Also, they all shared a dysmorphic phenotype characterized by a long face, deep set eyes, and prominent premaxilla. Genetic analysis of family members showed two inherited deletions. A comprehensive neuropsychological examination of the 2p16.3 deletion carriers revealed the same phenotype, characterized by anxiety disorder, borderline intelligence, and dysexecutive syndrome. The cognitive pattern of dysexecutive syndrome with poor working memory and reduced attention switching, mental flexibility, and verbal fluency was the same than those of the adult probands. We suggest that in addition to intellectual disability and psychiatric disease, NRXN1 deletion is a risk factor for a characteristic cognitive and dysmorphic profile. The new cognitive phenotype found in the 2p16.3 deletion carriers suggests that 2p16.3 deletions might have a wide variable expressivity instead of incomplete penetrance
Format: application/pdf
ISSN: 1617-4615 (versió paper)
1617-4623 (versió electrònica)
Document access: http://hdl.handle.net/10256/9566
Language: eng
Publisher: Springer Verlag
Collection: Reproducció digital del document publicat a: http://dx.doi.org/10.1002/mgg3.105
Articles publicats (D-CM)
Is part of: © Molecular Genetics and Genomics, 2014 (August 18), 10 p.
Rights: Tots els drets reservats
Subject: Trastorns d’ansietat
Anxiety disorders
Malalts mentals
Mentally ill
Title: A common cognitive, psychiatric, and dysmorphic phenotype in carriers of NRXN1 deletion
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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