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J Hum Genet. 2009 Apr;54(4):193-8. doi: 10.1038/jhg.2009.5. Epub 2009 Mar 13.

William's syndrome: gene expression is related to parental origin and regional coordinate control.

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1
Division of Neurogenetics, Cedars-Sinai Medical Center and Departments of Human Genetics and Pediatrics, UCLA, Los Angeles, CA, USA.

Abstract

William's syndrome (WS) features a spectrum of neurocognitive and behavioral abnormalities due to a rare 1.5 MB deletion that includes about 24-28 genes on chromosome band 7q11.23. Study of the expression of these genes from the single normal copy provides an opportunity to elucidate the genetic and epigenetic controls on these genes as well as their roles in both WS and normal brain development and function. We used quantitative RT-PCR to determine the transcriptional level of 14 WS gene markers in a cohort of 77 persons with WS and 48 normal controls. Results reported here: (1) show that the expression of the genes deleted in WS is decreased in some but not all cases, (2) demonstrate that the parental origin of the deletion contributes to the level of expression of GTF2I independently of age and gender and (3) indicate that the correlation of expression between GTF2I and some other genes in the WS region differs in WS subjects and normal controls, which in turn points toward a regulatory role for this gene. Interspecies comparisons suggest GTF2I may play a key role in normal brain development.

PMID:
19282872
PMCID:
PMC3556903
DOI:
10.1038/jhg.2009.5
[Indexed for MEDLINE]
Free PMC Article
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