No evidence for pathogenic variants or maternal effect of ZFP57 as the cause of Beckwith-Wiedemann Syndrome

TY - JOUR

T1 - No evidence for pathogenic variants or maternal effect of ZFP57 as the cause of Beckwith-Wiedemann Syndrome

AU - Boonen, Susanne E

AU - Hahnemann, Johanne M D

AU - Mackay, Deborah

AU - Tommerup, Niels

AU - Brøndum-Nielsen, Karen

AU - Tümer, Zeynep

AU - Grønskov, Karen

PY - 2012/1

Y1 - 2012/1

N2 - 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.

AB - 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.

KW - Beckwith-Wiedemann Syndrome

KW - Chromosomes, Human, Pair 11

KW - DNA Methylation

KW - DNA Mutational Analysis

KW - DNA-Binding Proteins

KW - Female

KW - Genetic Testing

KW - Humans

KW - Inheritance Patterns

KW - Male

KW - Mutation

KW - Transcription Factors

U2 - 10.1038/ejhg.2011.140

DO - 10.1038/ejhg.2011.140

M3 - Journal article

C2 - 21863059

SN - 1018-4813

VL - 20

SP - 119

EP - 121

JO - European Journal of Human Genetics

JF - European Journal of Human Genetics

IS - 1

ER -