Loss of imprinting (LOI) of DLX5 in preeclamptic placenta. A, Analysis of mean LOI levels for DLX5 in healthy and preeclamptic placenta samples. Values are presented as a mean±SEM of LOI (control: 0.1943±0.04765, n=16; early-onset preeclampsia [PE]: 0.5661±0.08516, n=12; late-onset preeclampsia: 0.6349±0.08437, n=14). **P<0.001, ***P<0.0001, 1-way ANOVA, Bonferroni multiple-comparisons test. B, Distribution (number) of DLX5 heterozygocities exceeding a particular LOI. C, Allelic expression analysis of the imprinted DLX5 in placenta samples exhibiting the allele-specific expression but no LOI. cDNA of the heterozygous placenta samples for the single nucleotide polymorphism (rs73708843) were sequenced. D, LOI correlated with DLX5 expression in placenta. P=0.046, Spearman rank correlation. E, CpG methylation of DLX5 locus. Log2-fold change of CpG methylation level in preeclampsia (control, n=20; early-onset preeclampsia, n=20). Hypomethylated CpG sites are shown (differentially methylated region at adjusted P≤0.05). F, Pairwise Spearman rank correlation of CpG methylation and DLX5 expression in placenta (control, n=8; early-onset preeclampsia, n=8; false discovery rate: *P<0.05, **P<0.01). gDNA indicates genomic DNA.