Development and Reproduction (한국발생생물학회지:발생과생식)

The Korean Society of Developmental Biology (한국발생생물학회)
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Effect of Alpha-Linolenic Acid on Oocyte Maturation and Embryo Development in Pigs

  • Lee, Ji-Eun (College of Animal Life Sciences, Kangwon National University) ;
  • Hwangbo, Yong (College of Animal Life Sciences, Kangwon National University) ;
  • Kim, Hwa-Young (College of Animal Life Sciences, Kangwon National University) ;
  • Lee, Won-Hee (College of Animal Life Sciences, Kangwon National University) ;
  • Cheong, Hee-Tae (College of Veterinary Medicine, Kangwon National University) ;
  • Yang, Boo-Keun (College of Animal Life Sciences, Kangwon National University) ;
  • Park, Choon-Keun (College of Animal Life Sciences, Kangwon National University)
  • Received : 2017.05.27
  • Accepted : 2017.06.02
  • Published : 2017.06.30
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Abstract

The aim of this study was to determine the effect of additional alpha-linolenic acid (ALA) supplementation during in vitro maturation (IVM) and culture (IVC) on nucleic maturation and embryo development of pigs. Cumulus-oocyte complexes (COCs) were incubated in IVM medium containing different concentration of ALA (25, 50 and $100{\mu}M$) for 44 h. After in vitro maturation, nuclear maturation of oocytes were evaluated by aceto-orcein stain. Mature oocytes with $50{\mu}M$ ALA were fertilized and cultured in IVC medium with ALA (25, 50 and $100{\mu}M$) during early-embryogenesis (48 hours after fertilization). Then, embryos were cultured with $25{\mu}M$ ALA during early embryogenesis and/or late embryogenesis (120 hours after early-embryogenesis). In results, oocyte maturation were significantly increased by $50{\mu}M$ ALA treatment groups compared with control groups (p<0.05). Treatment of $25{\mu}M$ ALA during early-embryogenesis enhanced cleavage rate of embryo compared with other groups (p<0.05), whereas formation and total cell number of blastocyst had no significant difference. Similarly, cleavage rate of embryos were increased by $25{\mu}M$ ALA supplement during early- or late-embryogenesis than ALA treatment both stage of embryogenesis (p<0.05), but did not influence to blastocyst formation. Interestingly, total cell number of blastocyst were enhanced in ALA treatment group during early-embryogenesis. These findings indicated that ALA supplement enhance the nuclear maturation of oocyte and embryo development, however, excessive ALA could negatively influence. Therefore, we suggest that ALA is used for improvement of in vitro production of mammalian embryo and further study regarding with functional mechanism of ALA is needed.

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References

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