Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (5): 1030-1039.doi: 10.11843/j.issn.0366-6964.2020.05.014

• ANIMAL BIOTECHNOLOGY AND REPRODUCTION • Previous Articles     Next Articles

Study on Whole Genome Methylation Pattern in Vitrified Bovine GV Oocytes

ZHANG Peipei1, WANG Jingjing1, HAO Haisheng1, DU Weihua1, PANG Yunwei1, QUAN Guobo2, ZHAO Shanjiang1, ZOU Huiying1, HAO Tong1, ZHU Huabin1, ZHAO Xueming1*   

  1. 1. Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Yunnan Animal Science and Veterinary Institute, Kunming 650224, China
  • Received:2019-12-09 Online:2020-05-25 Published:2020-05-16

Abstract: The aim of this study was to investigate the effect of vitrification on the genomic methylation patterns of bovine GV oocytes. Fresh and vitrified GV oocytes were collected. Single-cell whole-genome methylation sequencing(ScWGBS) technology was used to detect the whole-genome methylation levels of the fresh and vitrified bovine GV oocytes, in order to reveal the difference of DNA methylation patterns between the fresh and vitrified bovine GV oocytes. The results showed that vitrification didn't significantly affect the whole-genome methylation level of bovine GV oocytes. Gene ontology (GO) and kyoto encyclopedia of genes and genomes (KEGG) were used to analyze 140 differentially methylated regions(DMRs). It was found that DMRs were mainly involved in cell development, cytoskeleton organization, and they were mainly enriched in the PI3K-Akt and GnRH signaling pathways, and the partial related genes were screened about oocyte maturation (TSC2), cytoskeleton (NUDC), cell viability (MAFK) etc.. These results can provide the information foundation and research direction for improving the efficiency of vitrified GV oocytes.

Key words: vitrification, GV oocytes, ScWGBS, bovine, DMR

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