Effects of Reactive Oxygen Species on Sperm Function, Lipid Peroxidation and DNA Fragmentation in Bovine Spermatozoa

소 정자에 있어서 활성산소계가 정자 기능과 지방산화 및 DNA 절편화에 미치는 영향

  • Ryu, Buom-Yong (Department of Animal Science & Technology Chung-Ang University) ;
  • Chung, Yung-Chai (Department of Animal Science & Technology Chung-Ang University) ;
  • Kim, Chang-Keun (Department of Animal Science & Technology Chung-Ang University) ;
  • Shin, Hyun-A (Department of Animal Science & Technology Chung-Ang University) ;
  • Han, Jung-Ho (Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University) ;
  • Pang, Myung-Geol (Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University) ;
  • Oh, Sun-Kyung (Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University) ;
  • Kim, Seok-Hyun (Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University) ;
  • Moon, Shin-Yong (Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University)
  • 류범용 (중앙대학교 동물자원과학과) ;
  • 정영채 (중앙대학교 동물자원과학과) ;
  • 김창근 (중앙대학교 동물자원과학과) ;
  • 신현아 (중앙대학교 동물자원과학과) ;
  • 한정호 (서울대학교 의학연구원 인구의학연구소) ;
  • 방명걸 (서울대학교 의학연구원 인구의학연구소) ;
  • 오선경 (서울대학교 의학연구원 인구의학연구소) ;
  • 김석현 (서울대학교 의학연구원 인구의학연구소) ;
  • 문신용 (서울대학교 의학연구원 인구의학연구소)
  • Published : 2002.06.30

Abstract

Objective : To evaluate the effects of the reactive oxygen species (ROS) generated with a xanthine (X) and xanthine oxidase (XO) system on sperm function, the change of sperm characteristics, lipid peroxidation, and DNA fragmentation in bovine spermatozoa. Materials and Methods: ROS were produced using a combination of 1000 uM X and 50 mU/ml XO. The ROS scavengers: superoxide dismu tase (SOD) (200 U/ml) and catalase (500 U/ml) were also tested. Spermatozoa were incubated for 2 hours in BWW medium with a combination of X-XO supplemented with or without ROS scavengers at $37^{circ}C$ under 5% $CO_2$ incubator. Sperm movement characteristics by CASA (computer-aided sperm analysis), HOST (hypoosmotic swelling test), Caionophore induced acrosome reaction, malondialdehyde formation for the analysis of lipid peroxidation, the percentage of DNA fragmentation using the method of TdT-mediated nick end labelling (TUNEL) by flow cytometry were determined after 2 hours incubation. Results: The action of ROS on bovine spermatozoa resulted in a decreased in capacity for sperm motility, Ca-ionophore induced acrosome reaction and membrane integrity, an increased in malondialdehyde formation and the percentage of sperm with DNA fragmentation. In the effects of antioxidant, catalase completely alleviated the toxic effects induced by the ROS in terms of sperm function and characteristics, however SOD exhibited no capacity to reduce the toxic effects. Conclusion: The ROS can induce significant damages to sperm functions and characteristics. The useful ROS scavengers can minimized the defects of sperm function and various damages of spermatozoa.

Keywords

References

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