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- Title
Duplication of the NPHP1 gene in patients with autism spectrum disorder and normal intellectual ability: a case series.
- Authors
Yuka Yasuda; Ryota Hashimoto; Ryoko Fukai; Nobuhiko Okamoto; Yoko Hiraki; Hidenaga Yamamori; Michiko Fujimoto; Kazutaka Ohi; Masako Taniike; Ikuko Mohri; Mitsuko Nakashima; Yoshinori Tsurusaki; Hirotomo Saitsu; Naomichi Matsumoto; Noriko Miyake; Masatoshi Takeda
- Abstract
Autism spectrum disorder is a neurodevelopmental disorder characterized by impairments in social interactions, reduced verbal communication abilities, stereotyped repetitive behaviors, and restricted interests. It is a complex condition caused by genetic and environmental factors; the high heritability of this disorder supports the presence of a significant genetic contribution. Many studies have suggested that copy-number variants contribute to the etiology of autism spectrum disorder. Recently, copy-number variants of the nephronophthisis 1 gene have been reported in patients with autism spectrum disorder. To the best of our knowledge, only six autism spectrum disorder cases with duplications of the nephronophthisis 1 gene have been reported. These patients exhibited intellectual dysfunction, including verbal dysfunction in one patient, below-average verbal intellectual ability in one patient, and intellectual disability in four patients. In this study, we identified nephronophthisis 1 duplications in two unrelated Japanese patients with autism spectrum disorder using a high-resolution single-nucleotide polymorphism array. This report is the first to describe a nephronophthisis 1 duplication in an autism spectrum disorder patient with an average verbal intelligence quotient and an average performance intelligence quotient. However, the second autism spectrum disorder patient with a nephronophthisis 1 duplication had a below-average performance intelligence quotient. Neither patient exhibited physical dysfunction, motor developmental delay, or neurological abnormalities. This study supports the clinical observation of nephronophthisis 1 duplication in autism spectrum disorder cases and might contribute to our understanding of the clinical phenotype that arises from this duplication.
- Subjects
JAPAN; GENETICS of autism; CONFIDENCE intervals; GENETIC polymorphisms; INTELLECT; INTELLIGENCE tests; NEUROLOGIC examination; POLYMERASE chain reaction; QUESTIONNAIRES; RESEARCH funding; REPEATED measures design; DATA analysis software; TISSUE arrays
- Publication
Annals of General Psychiatry, 2014, Vol 13, Issue 1, p1
- ISSN
1744-859X
- Publication type
Article
- DOI
10.1186/s12991-014-0022-2