Abstract
Beckwith–Wiedemann syndrome (BWS) is an overgrowth syndrome, which, in 50–60% of sporadic cases, is caused by hypomethylation of KCNQ1OT1 differentially methylated region (DMR) at chromosome 11p15.5. The underlying defect of this hypomethylation is largely unknown. Recently, recessive mutations of the ZFP57 gene were reported in patients with transient neonatal diabetes mellitus type 1, showing hypomethylation at multiple imprinted loci, including KCNQ1OT1 DMR in some. The aim of our study was to determine whether ZFP57 alterations were a genetic cause of the hypomethylation at KCNQ1OT1 DMR in patients with BWS. We sequenced ZFP57 in 27 BWS probands and in 23 available mothers to test for a maternal effect. We identified three novel, presumably benign sequence variants in ZFP57; thus, we found no evidence for ZFP57 alterations as a major cause in sporadic BWS cases.
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Acknowledgements
Wilhelm Johannsen Centre for Functional Genome Research is established by the Danish National Research Foundation. This work was supported by a grant from the Danish Agency for Science, Technology and Innovation, the University of Copenhagen. Furthermore, financial support was granted by Director Jacob Madsen and wife Olga Madsens Foundation and King Christian X fond.
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Boonen, S., Hahnemann, J., Mackay, D. et al. No evidence for pathogenic variants or maternal effect of ZFP57 as the cause of Beckwith–Wiedemann Syndrome. Eur J Hum Genet 20, 119–121 (2012). https://doi.org/10.1038/ejhg.2011.140
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DOI: https://doi.org/10.1038/ejhg.2011.140
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