Journal of Assisted Reproduction and Genetics

, Volume 28, Issue 4, pp 325–333 | Cite as

DNA synthesis and epigenetic modification during mouse oocyte fertilization by human or hamster sperm injection

  • Yong-Nan Xu
  • Xiang-Shun Cui
  • Jin-Cheol Tae
  • Yong-Xun Jin
  • Nam-Hyung Kim



To evaluate DNA synthesis and epigenetic modification in mouse oocytes during the first cell cycle following the injection of human or hamster sperm.


Mouse oocytes following the injection of human and hamster sperm and cultured in M16 medium.


Male and female pronucleus formation, DNA synthesis, histone protein modification, and heterochromatin formation were similar in mouse oocytes injected with human or hamster sperm. However, DNA methylation patterns were altered in mouse oocytes following human sperm injection. Immunocytochemical staining with a histone H3-MeK9 antibody revealed that human and hamster sperm chromatin associated normally with female mouse chromatin, then entered into the metaphase and formed normal, two-cell stage embryos.


Although differences in epigenetic modification of DNA were observed, fertilization and cleavage occurred in a species non-specific manner in mouse oocytes.


Interspecies ICSI DNA synthesis Epigenetic modification Mouse oocyte 



This study was supported financially by a grant from the BioGreen 21 program (201003010612240010400 and 201003010612240010500) and KOSEF (20100002070), Rural Development Administration (RDA), Republic of Korea.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Yong-Nan Xu
    • 1
  • Xiang-Shun Cui
    • 2
  • Jin-Cheol Tae
    • 1
  • Yong-Xun Jin
    • 1
  • Nam-Hyung Kim
    • 1
  1. 1.Department of Animal SciencesChungbuk National UniversityCheongjuSouth Korea
  2. 2.College of Laboratory AnimalJilin UniversityChangchunChina

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