Effects of Exposure to Zearalenone on Porcine Oocytes and Sperm During Maturation and Fertilization In Vitro

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  • SAMBUU Rentsenkhand
    United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan Research Institute of Animal Husbandry, Zaisan-210153, Ulaanbaatar, Mongolia
  • TAKAGI Mitsuhiro
    Faculty of Agriculture, Kagoshima University, Kagoshima 890-0065, Japan
  • NAMULA Zhao
    United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan
  • OTOI Takeshige
    United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan
  • SHIGA Satoshi
    Faculty of Agriculture, Kagoshima University, Kagoshima 890-0065, Japan
  • RODRIGUES DOS SANTOS Regiane
    Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, The Netherlands
  • FINK-GREMMELS Johanna
    Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, The Netherlands

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The influence of acute exposure to zearalenone (ZEN) on porcine oocyte maturation, fertilization or sperm penetration ability during both in vitro maturation and fertilization was evaluated. First, oocytes were cultured in ZEN-containing (0-1000 μg/l) maturation medium and then fertilized. The oocytes maturing in vitro without ZEN were then fertilized in ZEN-containing fertilization medium. The maturation rates of oocytes and penetration ability of sperm decreased significantly in the presence of 1000 μg/l of ZEN. However, neither increases in the rates of degeneration and DNA fragmentation of oocytes nor reductions in normal and polyspermic fertilization were observed. ZEN did not affect the sperm penetration rates; however, 1000 μg/l ZEN had positive effects on normal and polyspermic fertilization rates. Therefore, it can be suggested that an acute exposure of porcine oocytes during maturation and of oocytes and sperm during fertilization to ZEN up to 1000 μg/l may not affect the fertility of the oocytes.<br>

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