Theriogenology : Superoxide Dismutase Activity in the Oviductal and Uterine Fluid of the Bitch and the Effects of the Enzyme on Viability, Motility and Hyperactivation of Canine Sperm In Vitro

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  • KOBAYASHI Masanori
    Laboratory of Reproduction, Nippon Veterinary and Life Science University, 1–7–1 Kyonan-cho, Musashino-shi, Tokyo 180–8602, Japan
  • WADA Miho
    Laboratory of Reproduction, Nippon Veterinary and Life Science University, 1–7–1 Kyonan-cho, Musashino-shi, Tokyo 180–8602, Japan
  • HORI Tatsuya
    Laboratory of Reproduction, Nippon Veterinary and Life Science University, 1–7–1 Kyonan-cho, Musashino-shi, Tokyo 180–8602, Japan
  • KAWAKAMI Eiichi
    Laboratory of Reproduction, Nippon Veterinary and Life Science University, 1–7–1 Kyonan-cho, Musashino-shi, Tokyo 180–8602, Japan

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  • Superoxide Dismutase Activity in the Oviductal and Uterine Fluid of the Bitch and the Effects of the Enzyme on Viability, Motility and Hyperactivation of Canine Sperm <i>In Vitro</i>

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Superoxide dismutase (SOD) activity in flushings from oviducts and uterine horns of 8 anestrous, 5 estrous and 7 diestrous bitches was measured. SOD activity in oviductal fluid in estrous bitches was significantly higher than that in anestrous and diestrous bitches (P<0.01). SOD activity in uterine fluid of diestrous bitches was, however, significantly higher than that in anestrous and estrous bitches (P<0.01). Additionally, sperm collected from normal dogs were incubated in MEM and in MEM containing SOD (SOD-MEM) for 24 hr. The percentages of sperm with viability, motility and hyperactivation in SOD-MEM were higher than those in MEM. SOD produced in oviduct and uterus may be able to maintain or improve sperm quality and fertility in the dog.

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