title: No evidence for pathogenic variants or maternal effect of ZFP57 as the cause of Beckwith-Wiedemann Syndrome.
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.
authors.affiliation: Center for Applied Human Molecular Genetics, The Kennedy Center, Glostrup, Denmark. seb@kennedy.dk
authors.forename: Susanne E
authors.initials: SE
authors.lastname: Boonen
authors.forename: Johanne M D
authors.initials: JM
authors.lastname: Hahnemann
authors.forename: Deborah
authors.initials: D
authors.lastname: Mackay
authors.forename: Niels
authors.initials: N
authors.lastname: Tommerup
authors.forename: Karen
authors.initials: K
authors.lastname: Brøndum-Nielsen
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Tümer
authors.forename: Karen
authors.initials: K
authors.lastname: Grønskov
mesh_terms: D001506:Beckwith-Wiedemann Syndrome / Q000175:diagnosis / Q000235:genetics* / Q000473:pathology; D002880:Chromosomes, Human, Pair 11 / Q000235:genetics; D019175:DNA Methylation; D004252:DNA Mutational Analysis; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D005820:Genetic Testing; D006801:Humans; D040582:Inheritance Patterns; D008297:Male; D009154:Mutation; D012097:Repressor Proteins; D014157:Transcription Factors / Q000235:genetics*
chemical_list: D004268:DNA-Binding Proteins; D012097:Repressor Proteins; D014157:Transcription Factors; C531063:ZFP57 protein, human