title: Lactose-egg yolk diluent supplemented with N-acetyl-D-glucosamine affect acrosome morphology and motility of frozen-thawed boar sperm.
abstract: These experiments were carried out to investigate the effect of N-acetyl-D-glucosamine, and to obtain additional information about the effect of orvus es paste (OEP) and egg yolk concentration in the freezing of boar sperm in the maxi-straw. The highest post-thaw acrosomes of normal apical ridge (NAR) and motility were obtained with 0.025 or 0.05% N-acetyl-D-glucosamine concentration in the first diluent. However, there were no effects of N-acetyl-D-glucosamine among the diluents with or without N-acetyl-D-glucosamine at the second dilution. The N-acetyl-D-glucosamine in the first and second diluents was added at room temperatures (20-23 degrees C) and 5 degrees C, respectively. It is suggested that the temperature of N-acetyl-D-glucosamine addition is important for the effect of boar sperm protection during freezing and thawing. When the 0.05% N-acetyl-D-glucosamine was supplemented in the first diluent, the optimum final OEP content was 0.5%. The optimum content of egg yolk in the diluent with 0.05% N-acetyl-D-glucosamine concentration was 20% and egg yolk was one of the main cryoprotective agents. In conclusion, we found out that the diluent with 0.025 or 0.05% soluble N-acetyl-D-glucosamine in the first diluent, 0.5% final orvus es paste concentration and 20% egg yolk concentration significantly enhanced NAR acrosomes and motility of boar sperm after freezing and thawing.
authors.affiliation: Division of Animal Science and Resources, Chungnam National University, Daejeon RK 305-764, South Korea.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Yi
authors.forename: G S
authors.initials: GS
authors.lastname: Im
authors.forename: C S
authors.initials: CS
authors.lastname: Park
mesh_terms: D000117:Acetylglucosamine / Q000494:pharmacology*; D000177:Acrosome / Q000378:metabolism; D000818:Animals; D015925:Cryopreservation / Q000379:methods / Q000662:veterinary*; D004530:Egg Yolk / Q000378:metabolism; D008297:Male; D012662:Semen Preservation / Q000379:methods / Q000662:veterinary*; D013081:Sperm Motility / Q000187:drug effects / Q000502:physiology; D013094:Spermatozoa; D013501:Surface-Active Agents / Q000494:pharmacology; D013552:Swine / Q000502:physiology*
chemical_list: D013501:Surface-Active Agents; D000117:Acetylglucosamine