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Diaz-Jimenez M, Rota A, Dorado J, Consuegra C, Pereira B, Camillo F, Panzani D, Fanelli D, Tesi M, Monaco D, Hidalgo M. First pregnancies in jennies with vitrified donkey semen using a new warming method. Animal 2020; 15:100097. [PMID: 33516021 DOI: 10.1016/j.animal.2020.100097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/30/2020] [Accepted: 10/01/2020] [Indexed: 12/15/2022] Open
Abstract
Sperm vitrification has been recently developed, but fertility trials have not been performed yet in equine species. In this study, a new warming technique for vitrified donkey semen was developed and the uterine inflammatory response and fertility were compared to conventional freezing. In Experiment 1, sperm was vitrified in straws and warmed in 3 ml of extender or in a water bath at: 37 °C/30 s; 43 °C/10 s; and 60 °C/5 s. Sperm motility, plasma and acrosome membranes and DNA integrity were compared between treatments. In Experiment 2, jennies were inseminated twice (500 × 106 sperm) in the uterine body either with vitrified or frozen semen (2 cycles/jenny). Pregnancy rates and the uterine inflammatory response (polymorphonuclear neutrophil concentration; PMN) were evaluated after artificial insemination (AI). No differences between warming in extender/water bath were found and 43 °C/10 s was better than lower temperatures in terms of total (53.8 ± 13.2%) and progressive sperm motility (41.4 ± 11.4%). No differences in PMN concentration (×103 PMN/ml) were found between vitrified (276.8 ± 171.6) or frozen (309.7 ± 250.7) semen after AI. However, PMN decreased faster (P < 0.05) using vitrified semen. Pregnancy rates were greater for vitrified (22%) than frozen semen (10%) but not statistically different. In conclusion, donkey sperm vitrified in straws could be directly warmed in a water bath at 43 °C/10 s, reducing the uterine inflammatory response obtained after AI and promoting positive pregnancy outcomes. These findings confirm the possibility to use vitrified semen as an alternative for AI in jennies.
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Affiliation(s)
- M Diaz-Jimenez
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, 14071 Cordoba, Spain; Department of Veterinary Sciences, University of Pisa, 56121 Pisa, Italy
| | - A Rota
- Department of Veterinary Sciences, University of Pisa, 56121 Pisa, Italy
| | - J Dorado
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, 14071 Cordoba, Spain
| | - C Consuegra
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, 14071 Cordoba, Spain
| | - B Pereira
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, 14071 Cordoba, Spain
| | - F Camillo
- Department of Veterinary Sciences, University of Pisa, 56121 Pisa, Italy
| | - D Panzani
- Department of Veterinary Sciences, University of Pisa, 56121 Pisa, Italy
| | - D Fanelli
- Department of Veterinary Sciences, University of Pisa, 56121 Pisa, Italy
| | - M Tesi
- Department of Veterinary Sciences, University of Pisa, 56121 Pisa, Italy
| | - D Monaco
- Department of Veterinary Medicine, University of Bari Aldo Moro, 70121 Bari, Italy
| | - M Hidalgo
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, 14071 Cordoba, Spain.
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Consuegra C, Crespo F, Dorado J, Diaz-Jimenez M, Pereira B, Hidalgo M. Low-density lipoproteins and milk serum proteins improve the quality of stallion sperm after vitrification in straws. Reprod Domest Anim 2020; 54 Suppl 4:86-89. [PMID: 31625235 DOI: 10.1111/rda.13495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/12/2019] [Accepted: 06/19/2019] [Indexed: 01/18/2023]
Abstract
Lipids and proteins can be used for sperm vitrification to preserve the integrity of sperm membranes or to increase the viscosity of the medium. This study evaluated the effect of low-density lipoproteins (LDL) and milk serum proteins (Pronexcell) for stallion sperm vitrification. Hippex extender (Barex Biochemical Products, The Netherlands), plus 1% of bovine serum albumin and 100 mM of trehalose, was used as control for sperm vitrification. In experiment 1, different concentrations of LDL (L1 = 0.25, L2 = 0.5, L3 = 1%) and in experiment 2 of Pronexcell (P1 = 1, P2 = 5, P3 = 10%) were added to control extender. Vitrification was performed in 0.25-ml straws directly plunged into liquid nitrogen. Total motility (TM, %) and progressive motility (PM, %) were analysed by CASA, and plasma membrane (IMS, %) and acrosome membrane integrity (AIS, %) were assessed under epifluorescence microscopy. Post-warmed sperm parameters were compared between treatments by ANOVA. Results were expressed as mean ± SEM. In both experiments, the minimum concentration of LDL and Pronexcell obtained significantly higher values (p < 0.01) than the control extender for TM (L1 = 52.95 ± 4.4; P1 = 58.99 ± 4.6; C = 30.88 ± 3.0), PM (L1 = 36.79 ± 5.5; P1 = 47.25 ± 4.3; C = 19.20 ± 2.4), IMS (L1 = 68.88 ± 3.6; P1 = 47.25 ± 4.3; C = 52.81 ± 2.6) and AIS (L1 = 45.88 ± 3.6; P1 = 47.25 ± 4.3; C = 26.00 ± 2.1). No differences in sperm parameters were found among different concentrations of LDL or Pronexcell. In conclusion, the addition of 0.25% LDL and 1% Pronexcell to the vitrification extender is recommended to improve the quality of stallion sperm after vitrification.
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Affiliation(s)
- Cesar Consuegra
- Veterinary Reproduction Group, University of Cordoba, Cordoba, Spain
| | | | - Jesús Dorado
- Veterinary Reproduction Group, University of Cordoba, Cordoba, Spain
| | | | - Blasa Pereira
- Veterinary Reproduction Group, University of Cordoba, Cordoba, Spain
| | - Manuel Hidalgo
- Veterinary Reproduction Group, University of Cordoba, Cordoba, Spain
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Consuegra C, Crespo F, Dorado J, Diaz-Jimenez M, Pereira B, Ortiz I, Hidalgo M. Vitrification of stallion sperm using 0.25 ml straws: Effect of volume, concentration and carbohydrates (sucrose/trehalose/raffinose). Anim Reprod Sci 2019; 206:69-77. [PMID: 31138492 DOI: 10.1016/j.anireprosci.2019.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/14/2019] [Accepted: 05/20/2019] [Indexed: 02/02/2023]
Abstract
Sperm vitrification is a rapid freezing method in which carbohydrates are used as cryoprotectants. The aim of this study was to determine the optimal volume, concentration and type of carbohydrates for stallion sperm vitrification using 0.25 ml straws in comparison to conventional freezing. Ejaculates (n = 54) were collected from six stallions. For vitrification, straws were filled with different volumes (30, 70, 100 μl), sperm concentrations (50, 100, 200 × 106 sperm/ml) and extenders containing sucrose (20, 100, 200 mM), trehalose (50, 100, 200 mM) and raffinose (50, 100, 200 mM) and plunged into LN2. Conventional freezing was performed in 0.5 ml straws frozen in LN2 vapors. Sperm motility, plasma and acrosome membrane integrities and DNA fragmentation were compared among treatments. The use of straws filled with 100 μl at 100 × 106 sperm/ml with the extender containing 100 mM trehalose resulted in greater values for sperm quality than the other concentrations, volumes and carbohydrates. With vitrification, there were greater values (mean ± SEM; P < 0.05) than freezing for progressive motility (48.2 ± 2.3 compared with 37.3 ± 2.2%), plasma membrane integrity (82.8 ± 1.5 compared with 74.1 ± 1.9%), and intact acrosomes (50.2 ± 1.2 compared with 43.1 ± 1.4%); and less DNA fragmentation (6.4 ± 0.7 compared with 8.2 ± 0.3%). In conclusion, stallion sperm can be vitrified in 0.25 ml straws filled with 100 μl of sperm at 100 x 106 sperm/ml using an extender with 100 mM of trehalose, obtaining better sperm quality after warming than conventional freezing.
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Affiliation(s)
- C Consuegra
- Veterinary Reproduction Group, Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain
| | - F Crespo
- Department of Reproduction, Centro Militar de Cría Caballar (CCFAS-Ministry of Defense), Ávila, Spain
| | - J Dorado
- Veterinary Reproduction Group, Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain
| | - M Diaz-Jimenez
- Veterinary Reproduction Group, Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain
| | - B Pereira
- Veterinary Reproduction Group, Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain
| | - I Ortiz
- Veterinary Reproduction Group, Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain
| | - M Hidalgo
- Veterinary Reproduction Group, Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain.
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Optimization of donkey sperm vitrification: Effect of sucrose, sperm concentration, volume and package (0.25 and 0.5 mL straws). Anim Reprod Sci 2019; 204:31-38. [PMID: 30902454 DOI: 10.1016/j.anireprosci.2019.03.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/14/2019] [Accepted: 03/04/2019] [Indexed: 11/22/2022]
Abstract
The aim of this study was to assess the effect of different factors affecting vitrification success of donkey sperm: extender, sperm concentration, volume and storage vessel type. In Experiment 1, sucrose supplementations at 0.25 and 0.1 M were compared using two base extenders (containing or not egg-yolk); in Experiment 2, three sperm concentrations were assessed: 100, 200 or 300 million sperm/mL; and in Experiment 3, three different sperm volumes (100, 160 and 200 μL) and two different storage vessels (0.25 and 0.5 mL straws) were assessed. Sperm motility variables (CASA), plasma membrane and acrosome (evaluated under fluorescence microscopy) and sperm DNA integrity (flow cytometry) were evaluated after warming with comparisons of protocols. There was a greater total (55.7 ± 16.4%) and progressive (44.0 ± 11.5%) motility using the extender with egg-yolk and 0.1 M sucrose. There were no effects of sperm concentrations on vitrification results (P > 0.05). The 0.25 mL covered straw showed higher values than the 0.5 mL straw for total (50.0 ± 17.3% vs 2.0 ± 6.7%) and progressive (40.5 ± 14.9% vs 0.9 ± 1.5%) motility, plasma membrane (43.9 ± 14.4% vs 14.0 ± 16.4%) and acrosome integrity (51.5 ± 13.6% vs 28.0 ± 14.7%), respectively. In conclusion, values for donkey sperm quality variables after vitrification were greater using an extender containing egg-yolk and 0.1 M sucrose, at 300 million sperm/mL in 0.25 mL straws with outer covers.
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Consuegra C, Crespo F, Dorado J, Diaz-Jimenez M, Pereira B, Ortiz I, Arenas R, Morrell JM, Hidalgo M. Vitrification of Large Volumes of Stallion Sperm in Comparison With Spheres and Conventional Freezing: Effect of Warming Procedures and Sperm Selection. J Equine Vet Sci 2019; 83:102680. [PMID: 31791531 DOI: 10.1016/j.jevs.2019.01.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/13/2019] [Accepted: 01/23/2019] [Indexed: 10/27/2022]
Abstract
Stallion sperm was vitrified using straws in comparison with spheres and conventional freezing. Vitrification was performed plunging 30 μL of sperm (spheres) or 0.5 mL straws into liquid nitrogen (LN2) and conventional freezing using 0.5 mL straws frozen in LN2 vapors. Sperm vitrified in straws were submitted to different warming procedures (42°C/20 seconds; 60°C/15 seconds) and single-layer centrifugation (SLC). Total (TM, %) and progressive sperm motility (PM, %), plasma membrane (IMS, %) and acrosome integrity (AIS, %) were statistically compared between treatments (mean ± SEM). Significant higher values (P < .001) were obtained after vitrification using spheres in comparison with conventional freezing and vitrification in straws for TM (54.46 ± 3.2 vs. 36.47 ± 3.2 vs. 2.50 ± 1.2, %), PM (38.63 ± 3.4 vs. 15.11 ± 2.0 vs. 1.9 ± 0.9, %), IMS (65.40 ± 2.8 vs. 50.50 ± 2.8 vs. 21.63 ± 2.1, %), and AIS (48.89 ± 2.8 vs. 15.46 ± 1.7 vs. 4.69 ± 0.9, %). No differences were found between warming procedures. Single-layer centrifugation after warming at 42°C/20 seconds obtained higher values (P < .05) than unselected samples for TM (32.52 ± 5.8%), PM (14.22 ± 2.8%), IMS (60.01 ± 3.2%), and AIS (44.5 ± 2.2%), whereas selection after 60°C/15 seconds increased TM (23.11 ± 4.3%) and IMS (67.11 ± 3.9%). In conclusion, vitrification in spheres obtained better sperm quality than conventional freezing and vitrification in straws. Warming procedures did not affect the sperm quality but SLC could be a strategy to enhance the quality of the samples after sperm vitrification using 0.5 mL straws.
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Affiliation(s)
- César Consuegra
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain
| | - Francisco Crespo
- Department of Reproduction, Centro Militar de Cría Caballar (CCFAS-Ministry of Defense), Ávila, Spain
| | - Jesús Dorado
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain
| | - Maria Diaz-Jimenez
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain
| | - Blasa Pereira
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain
| | - Isabel Ortiz
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain
| | - Regina Arenas
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain
| | - Jane M Morrell
- Division of Reproduction, Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Manuel Hidalgo
- Veterinary Reproduction Group, Faculty of Veterinary Medicine, Department of Medicine and Animal Surgery, University of Cordoba, Cordoba, Spain.
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