Highly variable genomic methylation in the Beckwith-Wiedemann syndrome associated with multi-locus imprinting disturbances.

ABSTRACT:

Background

The expression of imprinted genes, which depends on their gamete of origin, is regulated by DNA sequences characterized by differential methylation between the maternal and paternal alleles (also known as germline differentially methylated regions or gDMRs). The most common molecular defect associated with Beckwith-Wiedemann syndrome (BWS), a condition linked to overgrowth and tumours, is the loss of methylation of the KCNQ1OT1-TSS gDMR located on chromosome 11p15.5 (also known as IC2 LoM). Approximately one-third of BWS patients with IC2 LoM exhibit multi-locus imprinting disturbances (MLID). While maternal-effect variants in proteins of the oocyte subcortical maternal complex (SCMC) have been linked to MLID, the underlying mechanisms and health impact of this epigeneti

SUBMITTER: Cecere F 

PROVIDER: S-EPMC12495795 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature