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http://dx.doi.org/10.12749/RDB.2016.40.3.27

Effects of α-Linolenic Acid in Frozen-thawed Boar Spermatozoa  

Lee, Won-Hee (College of Animal Life Sciences, Kangwon National University)
Hwangbo, Yong (College of Animal Life Sciences, Kangwon National University)
Lee, Sang-Hee (Institute of Animal Resources, Kangwon National University)
Yang, Jin-Woo (College of Animal Life Sciences, Kangwon National University)
Kim, Hwa-Young (College of Animal Life Sciences, Kangwon National University)
Lee, Yu-Rim (College of Animal Life Sciences, Kangwon National University)
Park, Ji-Eun (College of Animal Life Sciences, Kangwon National University)
Cheong, Hee-Tae (College of Veterinary Medicine, Kangwon National University)
Yang, Boo-Keun (College of Animal Life Sciences, Kangwon National University)
Park, Choon-Keun (College of Animal Life Sciences, Kangwon National University)
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Abstract
The aim of this study was to evaluate effect of ${\alpha}$-linolenic acid (ALA) on viability, acrosome reaction and mitochondrial intact in frozen-thawed boar sperm. The boar semen was collected by gloved-hand method and cryopreserved in 20% egg yolk freezing extender containing ALA (0, 3, 5, and 10 ng/mL) with 0.05% ethanol. The frozen-boar spermatozoa were thawed at $37.5^{\circ}C$ for 45 sec in water-bath. The spermatozoa samples were evaluated the plasma membrane integrity, acrosome reaction, and mitochondrial integrity using flow cytometry. In results, population of live sperm with intact plasma membrane was significantly higher in control and 3 ng/mL ALA treatment group than ethanol group (p<0.05). In contract, dying sperms were higher in ethanol group than 3 ng/mL ALA treatment (p<0.05). Acrosomal membrane damage in all sperm population was reduced in 3 ng/mL ALA groups compared with ethanol treatment (p<0.05). However, acrosome damage in live sperm population was no significant difference among the all treatment groups. Mitochondrial integrity was not influenced by ALA treatments in both of live and all sperm population. In conclusion, this results show that supplement of ALA during the cryopreservation process could reduce the membrane damages including plasma and acrosomal membrane, whereas ALA did not influence to mitochondria in boar spermatozoa. Therefore, these results suggest that ALA can protect against the membrane damage derived cryo-stress, and cryopreservation efficiency of boar semen would be improved by use of ALA.
Keywords
Alpha-linolenic acid; Cryopreservation; Sperm characteristics; Pigs;
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