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KMID : 1025520120540040283
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Journal of Animal Science and Technology
2012 Volume.54 No. 4 p.283 ~ p.290
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Effect of Adding Taurine, Hypotaurine and Trehalose as Antioxidants to a Tris-based Egg Yolk Extender on Korean Jeju Black Bull Sperm Quality Following Cryopreservation
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Oh Shin-Ae
Ko Min-Hee
Kang Tae-Young
Choi Sun-Ho
Ko Moon-Suck
Chung Yung-Ho
Cho Won-Mo
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Abstract
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Cryopreservation induces sublethal damage to the spermatozoa, which leads to their reduced fertile life. The objective of this study was to investigate the effect of taurine, hypotaurine and trehalose as antioxidants on the function of the freezing-thawed sperm in Korean Jeju Black Bull. The semen was cryopreserved with tris egg yolk extendercontaining 7% glycerol and treated with 20mM taurine, hypotaurine and trehalose. Frozen-thawed sperms were evaluated for sperm motility, viability, membrane integrity, acrosome integrity and sperm penetration ability. The results were compared to semen cryopreserved in tris egg yolk extender containing 7% glycerol only as control. Frozen-thawed semen evaluation clearlyindicated that the addition of taurine or hypotaurine significantly improved (p<0.05) the motility and viability compared to control spermatozoa. Moreover, in membrane integrity, swollen sperm ratio was significantly increased (p<0.05) in taurine, hypotaurine or trehalose compared to control. In sperm acrosome integrity, F pattern ratio was increased (p<0.05) in hypotaurine among treatments, and AR pattern was significantly lowered (p<0.05) in taurine, hypotaurine and trehalose. In assessed sperm fertilizing ability, taurine, hypotaurine or trehalose significantly improved (p<0.05) the ratio of pronucleus formation and SFI. Finally, compared with the control, addition of taurine, hypotaurine or trehalose as an antioxidant to the freezing extender showed more positive effects on the frozen-thawed spermatozoa. It is concluded that the addition of taurine, hypotaurine, or trehalose to the freezing extender could reduce cryodamage of the Korean Jeju Black Bull spermatozoa.
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KEYWORD
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Antioxidant, Taurine, Hypotaurine, Trehalose, Semen freezing, Korean Jeju Black Bull
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