文献类型： 外文期刊
作者： Yuan, Xiaolong 1 ; Ye, Shaopan 1 ; Chen, Zitao 1 ; Pan, Xiangchun 1 ; Huang, Shuwen 1 ; Li, Zhonghui 1 ; Zhong, Yuyi 1 ;
作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Agroanim Genom & Mol Breed, Natl Engn Res Ctr Breeding Swine Ind, Coll Anim Sci, Guangzhou, Guangdong, Peoples R China
2.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou Higher Educ Mega Ctr, North Third Rd, Guangzhou 510006, Guangdong, Peoples R China
关键词： Genome-wide DNA methylation; DNMTs; Ovaries; Pubertal transition; Gilts
期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）
ISSN： 1471-2164
年卷期： 2019 年 20 卷
页码：
收录情况： SCI
摘要： BackgroundIn female mammals, the initiation of puberty, coupling with the dramatically morphological changes in ovaries, indicates the sexual and follicular maturation. Previous studies have suggested that the disrupted DNA methylation results in the delayed puberty. However, to date, the changes in ovarian methylomes during pubertal transition have not been investigated. In this study, using gilts as a pubertal model, the genome-wide DNA methylation were profiled to explore their dynamics during pubertal transition across Pre-, In- and Post-puberty.ResultsDuring pubertal transition, the follicles underwent maturation and luteinization, coupled with the significant changes in the mRNA expression of DNMT1 and DNMT3a. DNA methylation levels of In-puberty were higher than that of Pre- and Post-puberty at the locations of genes and CpG islands (CGIs). Analysis of the DNA methylation changes identified 12,313, 20,960 and 17,694 differentially methylated CpGs (DMCs) for the comparisons of Pre- vs. In-, In vs. Post-, and Pre- vs. Post-puberty, respectively. Moreover, the CGIs, upstream and exonic regions showed a significant underrepresentation of DMCs, but the CGI shores, CGI shelves, intronic, downstream and intergenic regions showed a significant overrepresentation of DMCs. Furthermore, biological functions of these methylation changes enriched in PI3K-Akt signaling pathway, GnRH signaling pathway, and Insulin secretion, and the mRNA expressions of several genes of these signaling pathway, including MMP2, ESR1, GSK3B, FGF21, IGF1R, and TAC3, were significantly changed across Pre-, In- and Post-puberty in ovaries.ConclusionsDuring pubertal transition in gilts, the DNA methylation changes of ovaries were likely to affect the transcription of genes related to PI3K-Akt signaling pathway, GnRH signaling pathway, and Insulin secretion. These observations can provide new insight into the epigenetic mechanism of follicular and sexual maturation during pubertal transition in mammals.
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