High resolution analysis of rare copy number variants in patients with autism spectrum disorder from Taiwan

Chia Hsiang Chen, Hsin I. Chen, Wei Hsien Chien, Ling Hui Li, Yu Yu Wu, Yen Nan Chiu, Wen Che Tsai, Susan Shur Fen Gau*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

23 Scopus citations

Abstract

Rare genomic copy number variations (CNVs) (frequency <1%) contribute a part to the genetic underpinnings of autism spectrum disorders (ASD). The study aimed to understand the scope of rare CNV in Taiwanese patients with ASD. We conducted a genome-wide CNV screening of 335 ASD patients (299 males, 36 females) from Taiwan using Affymetrix Genome-Wide Human SNP Array 6.0 and compared the incidence of rare CNV with that of 1093 control subjects (525 males, 568 females). We found a significantly increased global burden of rare CNVs in the ASD group compared to the controls as a whole or when the rare CNVs were classified by the size and types of CNV. Further analysis confirmed the presence of several rare CNVs at regions strongly associated with ASD as reported in the literature in our sample. Additionally, we detected several new private pathogenic CNVs in our samples and five patients carrying two pathogenic CNVs. Our data indicate that rare genomic CNVs contribute a part to the genetic landscape of our ASD patients. These CNVs are highly heterogeneous, and the clinical interpretation of the pathogenic CNVs of ASD is not straightforward in consideration of the incomplete penetrance, varied expressivity, and individual genetic background.

Original languageEnglish
Article number11919
JournalScientific Reports
Volume7
Issue number1
DOIs
StatePublished - 01 12 2017

Bibliographical note

Publisher Copyright:
© 2017 The Author(s).

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