Available online 28 January 2024, 110803

N6-methyladenosine (m6A) modification, a prominent post-transcriptional modification of eukaryotic mRNAs and non-coding RNAs, has been implicated in the progression of several female reproductive disorders.

Our present study firstly revealed the comprehensive and transcriptome-wide maps of m6A modification in lncRNAs of ovarian endometriosis.

These findings may enable the determination of the underlying mechanism governing the pathogenesis of ovarian endometriosis and provide theoretical basis for further deeper research on the role of m6A in the development of ovarian endometriosis.

N6-methyladenosine (m6A) methylation is the most prevalent internal epigenetic posttranscriptional mechanism for regulating mammalian RNA. Despite recent advances in determining the biological functions of m6A methylation, its association with the pathology of ovarian endometriosis remains uncertain. Herein, we performed m6A transcriptome-wide profiling to identify key lncRNAs with m6A modification involved in ovarian endometriosis development by bioinformatics analysis. We found the total m6A level was lower in ovarian endometriosis than in normal endometrium samples, with 9663 m6A peaks associated with 8989 lncRNAs detected in ovarian endometriosis and 9902 m6A peaks associated with 9210 lncRNAs detected in normal endometrium samples. These m6A peaks were primarily enriched within AAACU motifs. Functional enrichment analysis indicated that pathways involving the regulation of adhesion and development were significantly enriched in these differentially methylated lncRNAs. The regulatory relationships among lncRNAs, microRNAs (miRNAs), and mRNAs were identified by competing endogenous RNA (ceRNA) analysis and determination of the network regulating lncRNA-mRNA expression. Several specific lncRNA, including LINC00665, LINC00937, FZD10-AS1, DIO3OS and GATA2-AS1 which were differently expressed and modified by m6A, were validated using qRT-PCR and its interaction with infiltrating immune cells was explored. Furthermore, we found LncRNA DIO3OS promotes the invasion and migration of Human endometrial stromal cells (THESCs) and ALKBH5 regulates the expression of the lncRNA DIO3OS through m6A modification in vitro. Our study firstly revealed the transcriptome-wide map of m6A modification in lncRNAs of ovarian endometriosis. These findings may enable the determination of the underlying mechanism governing the pathogenesis of ovarian endometriosis and provide theoretical basis for further deeper research on the role of m6A in the development of ovarian endometriosis.

N6-methyladenosine

RNA modification

Endometriosis

Me-RIP seq

RNA-seq

Long non-coding RNA

methylated RNA immunoprecipitation sequencing

Long non-coding RNA

fat and obesity associated protein

YTH domain family proteins

insulin-like growth factor 2 mRNA binding protein

Methyltransferase Like 3

Kyoto Encyclopedia of Genes and Genomes

adhesion, aggression, angiogenesis

Real-time quantitative PCR

The datasets generated for this study could be found in the online repositories. The names of the repositories and accession number could be found below: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE208720.

© 2024 The Authors. Published by Elsevier Inc.