Whole-genome gene expression profiles of peripheral blood cells in an individual with Long QT syndrome and Beckwith-Wiedemann syndrome

We report RNAseq profiles of an individual carrying a maternally inherited splice variant in the first intron of the KCNQ1 gene and displaying complete loss of methylation at KCNQ1OT1:TSS DMR, the Imprinting Control Region of the centromeric domain of the Beckwith-Wiedemann locus. The half-sister was used as control. We show that the most 5’ 10 kb of KCNQ1 is about 2-3-fold more abundant than the rest of the gene in the proband, while RNA level was homogeneously distributed along the entire gene in the control. These results are consistent with data obtained from locus-specific analyses and overall suggest that premature termination of the KCNQ1 gene is occurring in cis with the splice variant and is associated with lack of methylation of the KCNQ1OT1:TSS DMR on the maternal chromosome. Examination of RNA level (RNAseq) in perypheral blood leukocytes of two individuals