KMID : 1005220140290020163
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Journal of Embryo Transfer 2014 Volume.29 No. 2 p.163 ~ p.169
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Characteristic Changes in Korean Native Cattle Spermatozoa Frozen-Thawed with L-Cysteine and/or Catalase
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Lee Sang-Hee
Lee Kyung-Jin Woo Jea-Seok Lee Seung-Hwan Cheong Hee-Tae Yang Boo-Keun Park Choon-Keun
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Abstract
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The objective of this study was to evaluate the characteristics of Korean Native Cattle sperm frozen-thawed with L-cysteine and/or catalase. The semen from bulls was collected by the artificial vagina method, and Triladyl containing 20% egg-yolk and/or L-cysteine (L), catalase (C) and L-cysteine + catalase was added to the diluted semen for cryopreservation. The results showed that sperm viability was significantly higher in the L-cysteine + catalase (69.49¡¾ 3.16%) group than in the control (60.5 ¡¾ 3.94%) group (p<0.05). Acrosome damage was significantly lower in the L-cysteine (17.12 ¡¾ 1.08%) group than in the control (21.46 ¡¾ 1.14%), catalase (20.54 ¡¾ 0.76%), and L-cysteine + catalase (19.29 ¡¾ 0.65%) groups (p<0.05). In addition, the level of intact mitochondria in the spermatozoa was significantly higher in the L-cysteine (58.65 ¡¾ 1.39%) group than in the control (50.63 ¡¾ 2.37%) group (p<0.05). The hydrogen peroxide level in the frozen-thawed sperm was significantly lower in the L-cysteine (3.74 ¡¾ 1.66%), catalase (4.65 ¡¾ 1.87%), and L-cysteine + catalase (8.11 ¡¾ 2.15%) groups than in the control (13.22 ¡¾ 1.6%) group (p<0.05). The glutathione level was significantly higher in the L-cysteine (1.33 ¡¾ 0.03%) group than in the control (1.08 ¡¾ 0.06 %), catalase (1.05 ¡¾ 0.02%) and L-cysteine + catalase (1.11 ¡¾ 0.03%) groups (p<0.05). In conclusion, L-cysteine and catalase could protect the membrane of Korean Native Cattle sperm from damage during sperm cryopreservation. Espe- cially, L-cysteine was more effective for keeping acrosomes and mitochondria intactness during sperm cryopreservation.
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KEYWORD
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L-cysteine , catalase , cryopreservation , sperm ability , Korean Native Cattle
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