Oocyte Ivm Or Vitrification Significantly Impairs Dna Methylation Patterns In Blastocysts As Analysed By Single-Cell Whole-Genome Methylation Sequencing
文献类型: 外文期刊
作者: Zhao, YH; Wang, JJ; Zhang, PP; Hao, HS; Pang, YW; Wang, HY; Du, WH; Zhao, SJ; Ruan, WM; Zou, HY; Hao, T; Zhu, HB; Zhao, XM
作者机构:
关键词: Bovine; Development; Embryo; Mechanism
期刊名称: REPRODUCTION FERTILITY AND DEVELOPMENT
ISSN: 1031-3613
年卷期: 2020 年 32 卷 7 期
页码:
收录情况: JCR(2021版)
摘要: To explore the mechanisms leading to the poor quality of IVF blastocysts, the single-cell whole-genome methylation sequencing technique was used in this study to analyse the methylation patterns of bovine blastocysts derived from in vivo, fresh (IVF) or vitrified (V_IVF) oocytes. Genome methylation levels of blastocysts in the IVF and V_IVF groups were significantly lower than those of the in vivo group (P < 0.05). In all, 1149 differentially methylated regions (DMRs) were identified between the IVF and in vivo groups, 1578 DMRs were identified between the V_IVF and in vivo groups and 151 DMRs were identified between the V_IVF and IVF groups. For imprinted genes, methylation levels of insulin-like growth factor 2 receptor (IGF2R) and protein phosphatase 1 regulatory subunit 9A (PPP1R9A) were lower in the IVF and V_IVF groups than in the in vivo group, and the methylation level of paternally expressed 3 (PEG3) was lower in the V_IVF group than in the IVF and in vivo groups. Genes with DMRs between the IVF and in vivo and the V_IVF and IVF groups were primarily enriched in oocyte maturation pathways, whereas DMR sbetween the V_IVF and in vivo groups were enriched in fertilisation and vitrification-vulnerable pathways. The results of this study indicate that differences in the methylation of critical DMRs may contribute to the differences in quality between in vitro- and in vivo-derived embryos.
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