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Recurrent copy number variations (CNVs) of human 16p11.2 have been associated with a variety of developmental/neurocognitive syndromes. In particular, deletion of 16p11.2 is found in patients with autism, developmental delay, and obesity. Patients with deletions or duplications have a wide range of clinical features, and siblings carrying the same deletion often have diverse symptoms. To study the consequence of 16p11.2 CNVs in a systematic manner, we used chromosome engineering to generate mice harboring deletion of the chromosomal region corresponding to 16p11.2, as well as mice harboring the reciprocal duplication. These 16p11.2 CNV models have dosage-dependent changes in gene expression, viability, brain architecture, and behavior. For each phenotype, the consequence of the deletion is more severe than that of the duplication. Of particular note is that half of the 16p11.2 deletion mice die postnatally; those that survive to adulthood are healthy and fertile, but have alterations in the hypothalamus and exhibit a "behavior trap" phenotype-a specific behavior characteristic of rodents with lateral hypothalamic and nigrostriatal lesions. These findings indicate that 16p11.2 CNVs cause brain and behavioral anomalies, providing insight into human neurodevelopmental disorders.

Original publication

DOI

10.1073/pnas.1114042108

Type

Journal article

Journal

Proc Natl Acad Sci U S A

Publication Date

11/10/2011

Volume

108

Pages

17076 - 17081

Keywords

Animals, Autistic Disorder, Behavior, Animal, Brain, Chromosome Deletion, Chromosomes, Human, Pair 16, Circadian Rhythm, Disease Models, Animal, Female, Gene Dosage, Genetic Engineering, Humans, Magnetic Resonance Imaging, Male, Mice, Mice, Inbred C57BL, Mice, Mutant Strains, Phenotype, Pregnancy, Transcriptome