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Microduplications of 16p11.2 are Associated with Schizophrenia
Journal article   Peer reviewed

Microduplications of 16p11.2 are Associated with Schizophrenia

Shane McCarthy, Vladimir Makarov, George Kirov, Anjene Addington, Jon McClellan, Seungtai Yoon, Dianna Perkins, Diane E Dickel, Mary Kusenda, Olga Krastoshevsky, …
Nature genetics, Vol.41(11), pp.1223-1227
11/2009
DOI: 10.1038/ng.474
PMCID: PMC2951180
PMID: 19855392
url
http://doi.org/10.1038/ng.474View
Open Access

Abstract

Recurrent microdeletions and microduplications of a 600 kb genomic region of chromosome 16p11.2 have been implicated in childhood-onset developmental disorders 1 - 3 . Here we report the strong association of 16p11.2 microduplications with schizophrenia in two large cohorts. In the primary sample, the microduplication was detected in 12/1906 (0.63%) cases and 1/3971 (0.03%) controls ( P =1.2×10 -5 , OR=25.8). In the replication sample, the microduplication was detected in 9/2645 (0.34%) cases and 1/2420 (0.04%) controls ( P =0.022, OR=8.3). For the series combined, microduplication of 16p11.2 was associated with 14.5-fold increased risk of schizophrenia (95% C.I. [3.3, 62]). A meta-analysis of multiple psychiatric disorders showed a significant association of the microduplication with schizophrenia, bipolar disorder and autism. The reciprocal microdeletion was associated only with autism and developmental disorders. Analysis of patient clinical data showed that head circumference was significantly larger in patients with the microdeletion compared with patients with the microduplication (P = 0.0007). Our results suggest that the microduplication of 16p11.2 confers substantial risk for schizophrenia and other psychiatric disorders, whereas the reciprocal microdeletion is associated with contrasting clinical features.

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