Phenotypic Impact of Rare Potentially Damaging Copy Number Variation in Obsessive-Compulsive Disorder and Chronic Tic Disorders.

Behrang Mahjani; Rebecca Birnbaum; Ariela Buxbaum Grice; Carolina Cappi; Seulgi Jung; Marina Natividad Avila; Abraham Reichenberg; Sven Sandin; Christina M Hultman; Joseph D Buxbaum; Dorothy E Grice

doi:10.3390/genes13101796

PubMed · 36292681

Phenotypic Impact of Rare Potentially Damaging Copy Number Variation in Obsessive-Compulsive Disorder and Chronic Tic Disorders.

Behrang Mahjani·Rebecca Birnbaum·Ariela Buxbaum Grice·Carolina Cappi·Seulgi Jung·Marina Natividad Avila·Abraham Reichenberg·Sven Sandin·Christina M Hultman·Joseph D Buxbaum·Dorothy E Grice

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Abstract

BACKGROUND: Recent studies report an important-and previously underestimated-role of rare variation in risk of obsessive-compulsive disorder (OCD) and chronic tic disorders (CTD). Using data from a large epidemiological study, we evaluate the distribution of potentially damaging copy number variation (pdCNV) in OCD and CTD, examining associations between pdCNV and the phenotypes of probands, including a consideration of early- vs. late-diagnoses. METHOD: The Obsessive-Compulsive Inventory-Revised (OCI-R) questionnaire was used to ascertain psychometric profiles of OCD probands. CNV were identified genome-wide using chromosomal microarray data. RESULTS: For 993 OCD cases, 86 (9%) were identified as pdCNV carriers. The most frequent pdCNV found was at the 16p13.11 region. There was no significant association between pdCNV and the OCI-R total score. However, pdCNV was associated with Obsessing and Checking subscores. There was no significant difference in pdCNV frequency between early- vs. late-diagnosed OCD probands. Of the 217 CTD cases, 18 (8%) were identified as pdCNV carriers. CTD probands with pdCNV were significantly more likely to have co-occurring autism spectrum disorder (ASD). CONCLUSIONS: pdCNV represents part of the risk architecture for OCD and CTD. If replicated, our findings suggest pdCNV impact some OCD symptoms. Genes within the 16p13.11 region are potential OCD risk genes.

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Humans DNA Copy Number Variations Tourette Syndrome Autism Spectrum Disorder Tic Disorders Obsessive-Compulsive Disorder Phenotype Tourette syndrome chronic tic disorders copy number variation obsessive-compulsive disorder potentially damaging variation Journal Article Research Support, Non-U.S. Gov't Research Support, N.I.H., Extramural

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Behrang Mahjani, Rebecca Birnbaum, Ariela Buxbaum Grice, Carolina Cappi, Seulgi Jung, Marina Natividad Avila, Abraham Reichenberg, Sven Sandin, Christina M Hultman, Joseph D Buxbaum, Dorothy E Grice. 2022-10-05. Phenotypic Impact of Rare Potentially Damaging Copy Number Variation in Obsessive-Compulsive Disorder and Chronic Tic Disorders.. https://doi.org/10.3390/genes13101796

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