The effect of calcium ion concentrations in the medium and the treatment of caffeine and Ca-ionophore A23187 on in vitro capacitation of bull spermatozoa

배양액중의 calcium 이온 농도 및 caffeine과 Ca-ionophore A23187 처리가 소정자의 수정능획득에 미치는 영향

  • Kim, Kye-Seung (College of Veterinary Medicine, Seoul National University) ;
  • Jo, Choong-Ho (College of Veterinary Medicine, Seoul National University) ;
  • Hwang, Woo-Seok (College of Veterinary Medicine, Seoul National University)
  • Received : 1990.10.12
  • Published : 1991.01.31

Abstract

The present study was performed to investigate the effect of Ca ion concentration on sperm viability and acrosome reaction rate and to evaluate the effect of treatments using caffeine and Ca-ionophore A23187 on acrosome reaction rate in frozen-thawed bull spermatozoa. Viabilities of in vitro capacitated bull spermatozoa at 0, 2.25 and 4.5 mM Ca ion concenrations were 21.00, 26.00 and 22.59%, respectively and significantly higher in Ca ion 2.25mM added group than Ca ion free group (p<0.05) and acrosome reaction rates of in vitro capacitated bull spermatozoa were 17.09, 52.15 and 47.92%, respectively and significantly high in Ca ion added groups(p<0.05). Viabilities in vitro capacitation by caffeine and Ca-ionophore A23187 in control, caffeine treated group, Ca-ionophore A23187 treated group and caffeine+Ca-ionophore A23187 treated group were 37.91, 27.67, 22.33 and 25.59%, respectively and significantly higher in control than treated groups(p<0.05), there were no significant differences among the treated groups, and acrosome reaction rates were 10.33, 37.92, 48.09 and 57.17%, respectively and there were significant differences among the groups(p<0.05), especially higher in caffeine+Ca-ionophore A23187 treated group than others.