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一位患者存在多处印记紊乱,表现为 11p15 和 14q32 甲基化不足,并具有 Beckwith-Wiedemann 和 Temple 综合征的表型特征。

A patient with multilocus imprinting disturbance involving hypomethylation at 11p15 and 14q32, and phenotypic features of Beckwith-Wiedemann and Temple syndromes.

机构信息

Human Development and Health, Faculty of Medicine, University of Southampton, Tremona Road, Southampton, UK.

Department of Paediatric Endocrinology, University Hospital Southampton NHS Foundation Trusts, Southampton, UK.

出版信息

Am J Med Genet A. 2022 Jun;188(6):1896-1903. doi: 10.1002/ajmg.a.62717. Epub 2022 Mar 9.

Abstract

Beckwith-Wiedemann syndrome (BWS) and Temple syndrome (TS) are classical imprinting disorders (IDs) with nonconfluent clinical features. We report here on a patient with clinical features of both syndromes, in whom epimutations were found at the BWS and TS imprinted regions, consistent with multilocus imprinting disturbance (MLID). This is the first case report of a patient with clinical features of both conditions who was found to have loss of methylation (LOM) of KCNQ1OT1: TSS-DMR (ICR2) in the 11p15 imprinted region associated with BWS and LOM of MEG3: TSS-DMR in the 14q32 imprinted region associated with TS. The report draws attention to the importance of testing for MLID as a cause of atypical clinical presentations of patients with IDs.

摘要

贝克威思-威德曼综合征(BWS)和坦普尔综合征(TS)是具有非融合临床特征的经典印迹障碍(ID)。我们在此报告了一例具有两种综合征临床特征的患者,在该患者中,在 BWS 和 TS 印迹区域发现了表观遗传突变,符合多基因印迹障碍(MLID)。这是首例具有两种疾病临床特征的患者病例报告,该患者发现 11p15 印迹区域与 BWS 相关的 KCNQ1OT1:TSS-DMR(ICR2)的甲基化丢失(LOM)和 14q32 印迹区域与 TS 相关的 MEG3:TSS-DMR 的 LOM。该报告提请注意,作为 ID 患者非典型临床表现的原因,对 MLID 进行检测非常重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b605/9310769/a47693dbfff7/AJMG-188-1896-g002.jpg

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