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2017 ; 8
(34
): 56829-56838
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DNA methylation signature of long noncoding RNA genes during human
pre-implantation embryonic development
#MMPMID28915634
Li J
; Han W
; Shen X
; Han S
; Ye H
; Huang G
Oncotarget
2017[Aug]; 8
(34
): 56829-56838
PMID28915634
show ga
DNA methylation have crucial roles in regulating the expression of developmental
genes during mammalian pre-implantation embryonic development (PED). However, the
DNA methylation dynamic pattern of long noncoding RNA (lncRNA) genes, one type of
epigenetic regulators, in human PED have not yet been demonstrated. Here, we
performed a comprehensive analysis of lncRNA genes in human PED based on public
reduced representation bisulphite sequencing (RRBS) data. We observed that both
lncRNA and protein-coding genes complete the major demethylation wave at the
2-cell stage, whereas the promoters of lncRNA genes show higher methylation level
than protein-coding genes during PED. Similar methylation distribution was
observed across the transcription start sites (TSS) of lncRNA and protein-coding
genes, contrary to previous observations in tissues. Besides, not only the
gamete-specific differentially methylated regions (G-DMRs) but also the embryonic
developmental-specific DMRs (D-DMRs) showed more paternal bias, especially in
promoter regions in lncRNA genes. Moreover, coding-non-coding gene co-expression
network analysis of genes containing D-DMRs suggested that lncRNA genes involved
in PED are associated with gene expression regulation through several means, such
as mRNA splicing, translational regulation and mRNA catabolic. This firstly
provides study provides the methylation profiles of lncRNA genes in human PED and
improves the understanding of lncRNA genes involvement in human PED.