Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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The antioxidant icariin protects porcine oocytes from age-related damage in vitro

  • Yoon, Jae-Wook (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Lee, Seung-Eun (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Park, Yun-Gwi (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Kim, Won-Jae (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Park, Hyo-Jin (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Park, Chan-Oh (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Kim, So-Hee (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Oh, Seung-Hwan (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Lee, Do-Geon (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Pyeon, Da-Bin (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Kim, Eun-Young (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University) ;
  • Park, Se-Pill (Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University)
  • Received : 2020.01.28
  • Accepted : 2020.04.29
  • Published : 2021.04.01
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Abstract

Objective: If fertilization does not occur within a specific period, the quality of unfertilized oocytes in the oviduct (in vivo aging) or in culture (in vitro aging) will deteriorate over time. Icariin (ICA), found in all species of Epimedium herbs, has strong antioxidant activity, and is thought to exert anti-aging effects in vitro. We asked whether ICA protects oocytes against age-related changes in vitro. Methods: We analyzed the reactive oxygen species (ROS) levels and expression of antioxidant, maternal, and estrogen receptor genes, and along with spindle morphology, and the developmental competence and quality of embryos in the presence and absence of ICA. Results: Treatment with 5 μM ICA (ICA-5) led to a significant reduction in ROS activity, but increased mRNA expression of glutathione and antioxidant genes (superoxide dismutase 1 [SOD1], SOD2, peroxiredoxin 5, and nuclear factor erythroid 2-like 2), during aging in vitro. In addition, ICA-5 prevented defects in spindle formation and chromosomal alignment, and increased mRNA expression of cytoplasmic maturation factor genes (bone morphogenetic protein 15, cyclin B1, MOS proto-oncogene, serine/threonine kinase, and growth differentiation factor-9). It also prevented apoptosis, increased mRNA expression of antiapoptotic genes (BCL2-like 1 and baculoviral IAP repeat-containing 5), and reduced mRNA expression of pro-apoptotic genes (BCL2 antagonist/killer 1 and activation of caspase-3). Although the maturation and cleavage rates were similar in all groups, the total cell number per blastocyst and the percentage of apoptotic cells at the blastocyst stage were higher and lower, respectively, in the control and ICA-5 groups than in the aging group. Conclusion: ICA protects oocytes against damage during aging in vitro; therefore, it can be used to improve assisted reproductive technologies.

Keywords

References

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