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논문 기본 정보

자료유형
학술저널
저자정보
Kim Hwa Young (Department of Pediatrics Seoul National University Hospital Seoul National University College of Me) Shin Choong Ho (Department of Pediatrics Seoul National University Hospital Seoul National University College of Me) Lee Young Ah (Department of Pediatrics Seoul National University Hospital Seoul National University College of Me) Shin Chang Ho (Department of Orthopaedic Surgery Seoul National University College of Medicine Seoul Korea) Kim Gu-Hwan (Medical Genetics Center Asan Medical Center University of Ulsan College of Medicine Seoul Korea) Ko Jung Min (Department of Pediatrics Seoul National University Hospital Seoul National University College of Me)
저널정보
대한진단검사의학회 Annals of Laboratory Medicine Annals of Laboratory Medicine 제42권 제6호
발행연도
2022.11
수록면
668 - 677 (10page)
DOI
10.3343/alm.2022.42.6.668

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Background: Beckwith–Wiedemann syndrome (BWS) is a congenital overgrowth disorder caused by genetic or epigenetic alterations at two imprinting centers (ICs) in the 11p15.5 region. Delineation of the molecular defects is important for prognosis and predicting familial recurrence. We evaluated epigenetic alterations and potential epigenotype–phenotype correlations in Korean children with BWS. Methods: Forty children with BWS with proven genetic or epigenetic defects in the 11p15.5 region were included. The phenotype was scored using the BWS consensus scoring system. Methylation-specific multiplex ligation-dependent probe amplification (MS-MLPA), bisulfite pyrosequencing, a single-nucleotide polymorphism microarray, and CDKN1C sequencing were used for confirmative diagnosis. Results: Patients met the criteria for genetic testing, with a mean clinical score of 5.4±2.0. Methylation alterations were consistent between MS-MLPA and bisulfite pyrosequencing in all patients. Twenty-six patients (65.0%) had IC2 loss of methylation (IC2-LoM), 11 (27.5%) had paternal uniparental disomy (patUPD), and one (2.5%) had IC1 gain of methylation. Macroglossia and external ear anomalies were more common in IC2-LoM than in patUPD, and lateralized overgrowth was more common in patUPD than in IC2-LoM (all P<0.05). Methylation levels at IC2 were inversely correlated with birth weight standard deviation score (r=–0.476, P=0.014) and clinical score (r=–0.520, P=0.006) in the IC2-LoM group. Conclusions: Comprehensive molecular analysis of the 11p15.5 region revealed epigenotype–phenotype correlations in our BWS cohort. Bisulfite pyrosequencing can help clarify epigenotypes. Methylation levels were correlated with fetal growth and clinical severity in patients with BWS.

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