Small 6q16.1 Deletions Encompassing POU3F2 Cause Susceptibility to Obesity and Variable Developmental Delay with Intellectual Disability.

Am J Hum Genet 2016 Feb 28;98(2):363-72. Epub 2016 Jan 28.

Manchester Centre for Genomic Medicine, Institute of Human Development, Faculty of Medical and Human Sciences, University of Manchester, Manchester M13 9WL, UK; Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre (MAHSC), Manchester M13 9WL, UK. Electronic address:

Genetic studies of intellectual disability and identification of monogenic causes of obesity in humans have made immense contribution toward the understanding of the brain and control of body mass. The leptin > melanocortin > SIM1 pathway is dysregulated in multiple monogenic human obesity syndromes but its downstream targets are still unknown. In ten individuals from six families, with overlapping 6q16.1 deletions, we describe a disorder of variable developmental delay, intellectual disability, and susceptibility to obesity and hyperphagia. The 6q16.1 deletions segregated with the phenotype in multiplex families and were shown to be de novo in four families, and there was dramatic phenotypic overlap among affected individuals who were independently ascertained without bias from clinical features. Analysis of the deletions revealed a ∼350 kb critical region on chromosome 6q16.1 that encompasses a gene for proneuronal transcription factor POU3F2, which is important for hypothalamic development and function. Using morpholino and mutant zebrafish models, we show that POU3F2 lies downstream of SIM1 and controls oxytocin expression in the hypothalamic neuroendocrine preoptic area. We show that this finding is consistent with the expression patterns of POU3F2 and related genes in the human brain. Our work helps to further delineate the neuro-endocrine control of energy balance/body mass and demonstrates that this molecular pathway is conserved across multiple species.

Download full-text PDF

Source
http://www.cell.com/ajhg/pdf/S0002-9297(15)00509-1.pdf
Web Search
http://linkinghub.elsevier.com/retrieve/pii/S000292971500509
Publisher Site
http://dx.doi.org/10.1016/j.ajhg.2015.12.014DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4746363PMC
February 2016
76 Reads
9 Citations
10.931 Impact Factor

Publication Analysis

Top Keywords

6q161 deletions
12
intellectual disability
12
variable developmental
8
developmental delay
8
susceptibility obesity
8
delay intellectual
8
genes human
4
dramatic phenotypic
4
pou3f2 genes
4
families dramatic
4
human brain
4
families novo
4
novo families
4
phenotypic overlap
4
overlap individuals
4
ascertained bias
4
bias clinical
4
consistent expression
4
expression patterns
4
independently ascertained
4

Similar Publications