1
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Bolarin A, Berndtson J, Tejerina F, Cobos S, Pomarino C, D'Alessio F, Blackburn H, Kaeoket K. Boar semen cryopreservation: State of the art, and international trade vision. Anim Reprod Sci 2024:107496. [PMID: 38763787 DOI: 10.1016/j.anireprosci.2024.107496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/05/2024] [Accepted: 05/06/2024] [Indexed: 05/21/2024]
Abstract
Biosecurity is a major concern in the global pig production. The separation in time of semen collection, processing and insemination in the pig farm is a few days for chilled semen but it can be indefinite when using cryopreserved semen. Field fertility results of boar cryopreserved semen are close to chilled semen, which makes it a valuable resource for the establishment of semen genebanks, long-distance semen trade, and the implementation of other technologies such as the sex-sorted semen. But cryopreserved semen is far from being routine in pig farms. The most recent research efforts to facilitate its implementation include the use of additives before freezing, or in the thawing extender. Long-term preserved semen trade is a biosecurity challenge. To harmonize international trade of germplasm, the World Organization of Animal Health (WOAH) established a regulatory framework for all member countries. The present paper aims to review the latest advances of boar semen cryopreservation with special focus on the benefits of its inclusion as a routine tool in the pig industry. We also review recently reported field fertility results of cryopreserved semen, its international trade compared to chilled semen, and the regulatory framework involved. Boar cryopreserved semen is a valuable tool to control biosecurity risk, implement other technologies, and facilitate international trade. Research already demonstrated good field fertility results, but it still represents less than 0.1 % of the international trade. As boar cryopreserved semen gets closer to implementation, the correspondent authorities are reviewing the trade rules.
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Affiliation(s)
| | | | - F Tejerina
- Ministry of Agriculture, Fisheries and Food. General Sub-directorate of Livestock Inputs, Madrid, Spain
| | - S Cobos
- Ministry of Agriculture, Fisheries and Food. General Sub-directorate of Health Agreements and Border Control, Madrid, Spain
| | - C Pomarino
- Ministry of Agriculture, Fisheries and Food. General Sub-directorate of Animal Health and Hygiene and Traceability, Madrid, Spain
| | - F D'Alessio
- World Organization for Animal Health (OIE), Paris, France
| | - H Blackburn
- USDA-ARS, National Animal Germplasm Program, Fort Collins, CO, United States
| | - K Kaeoket
- Semen Laboratory, Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon-Pathom 73170, Thailand
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2
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Sharafi M, Borghei-Rad SM, Hezavehei M, Shahverdi A, Benson JD. Cryopreservation of Semen in Domestic Animals: A Review of Current Challenges, Applications, and Prospective Strategies. Animals (Basel) 2022; 12:ani12233271. [PMID: 36496792 PMCID: PMC9739224 DOI: 10.3390/ani12233271] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/11/2022] [Accepted: 11/21/2022] [Indexed: 11/26/2022] Open
Abstract
Cryopreservation is a way to preserve germplasm with applications in agriculture, biotechnology, and conservation of endangered animals. Cryopreservation has been available for over a century, yet, using current methods, only around 50% of spermatozoa retain their viability after cryopreservation. This loss is associated with damage to different sperm components including the plasma membrane, nucleus, mitochondria, proteins, mRNAs, and microRNAs. To mitigate this damage, conventional strategies use chemical additives that include classical cryoprotectants such as glycerol, as well as antioxidants, fatty acids, sugars, amino acids, and membrane stabilizers. However, clearly current protocols do not prevent all damage. This may be due to the imperfect function of antioxidants and the probable conversion of media components to more toxic forms during cryopreservation.
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Affiliation(s)
- Mohsen Sharafi
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
- Semex Alliance, Guelph, ON N1H 6J2, Canada
- Correspondence: (M.S.); (J.D.B.)
| | - Seyyed Mohsen Borghei-Rad
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran 16635-148, Iran
| | - Maryam Hezavehei
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran 16635-148, Iran
| | - Abdolhossein Shahverdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran 16635-148, Iran
| | - James D. Benson
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
- Correspondence: (M.S.); (J.D.B.)
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3
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Shepherd MJ, Herickhoff LA. A novel experimental design for boar sperm cryopreservation. J Anim Sci 2022; 100:6586253. [PMID: 35575130 PMCID: PMC9271989 DOI: 10.1093/jas/skac169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 05/13/2022] [Indexed: 11/12/2022] Open
Abstract
Cryopreservation of sperm is a routine technology in many livestock species, but not in swine. Frozen sperm must result in acceptable conception rates and produce 11-12 piglets/litter to be competitive with traditional cooled semen. The development of an extender that results in high post-thaw sperm quality and acceptable litter size requires identification of factors that markedly impact post-thaw semen quality. The present study aims to first identify factors in boar sperm cryopreservation that significantly impacts post-thaw sperm quality using an efficient, cost-effective, and relatively rapid approach. The Plackett-Burman experimental design is ideal for the screening of factors at their extreme, greatly reducing the amount of time and resources needed for a follow-up, full factorial design. Using commercial semen, a 9 factor, 12 run Plackett-Burman design was used on 10 boars split between 12 treatments. Via this method glycerol concentration, cooling rate, antioxidant supplementation with GameteGuard(Membrane Protective Technologies, Inc. Fort Collins, CO), and straw size were identified as highly influential factors that impact post-thaw sperm quality. Extender type, starting osmolality, sodium dodecyl sulfate addition, and stepwise addition of glycerol were also influential for some but not all post-thaw sperm parameters (p<0.05). Equilibration time in the straws before freezing was determined to have no impact on post thaw sperm quality parameters. Using the Plackett-Burman design, it can be concluded that four of the nine factors warrant detailed investigation in a full factorial experiments in development of boar sperm cryopreservation extenders.
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Affiliation(s)
- Myles J Shepherd
- Department of Biomedical Sciences, Colorado State University, Fort Collins - CO 80526 USA.,Membrane Protective Technologies Inc. Fort Collins, CO 80524 USA
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4
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de Brito CRC, Varela Junior AS, Gheller SMM, Acosta IB, Anciuti AN, Gatti NLS, Silva EA, Knabah NW, Corcini CD. High-speed centrifugation of extender of freeze-thaw boar semen. Reprod Domest Anim 2021; 56:821-825. [PMID: 33569811 DOI: 10.1111/rda.13915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/03/2021] [Accepted: 02/08/2021] [Indexed: 11/29/2022]
Abstract
In semen cryopreservation, egg yolk is still widely used as a non-penetrating cryoprotectant. Much has been developed in the search for alternatives for this biological product. This work aimed to evaluate the processed egg yolk through ultracentrifugation and/or sonication in the cryopreservation of swine semen. Twenty-seven semen doses were purchased from a commercial boar stud and processed for cryopreservation using egg yolk lactose 11% (control) extender, processed using two different methods: high-speed centrifugation and sonication. Then, they were submitted to freeze-thawing protocol and were assessed for kinematic and cell structural parameters. Samples in which extenders underwent centrifugation had better results in velocity parameters, meanwhile those that only sonication was performed had poorest results in this parameter. The preservation of the membrane and mitochondria structure had better results when the diluent was only centrifuged in comparison with the other treatments. Therefore, centrifugation of extender containing egg yolk is important for better cryopreservation of swine semen.
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Affiliation(s)
- Camila R C de Brito
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Antonio Sergio Varela Junior
- RAC, Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal de Rio Grande (FURG), Rio Grande, Brazil
| | - Stela Mari M Gheller
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Izani B Acosta
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Andreia N Anciuti
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Norton Luiz S Gatti
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Edenara A Silva
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Nathalia W Knabah
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
| | - Carine D Corcini
- ReproPel Research Group, Veterinary Faculty, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil
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5
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Chen G, Ren L, Chang Z, Zhao Y, Zhang Y, Xia D, Zhao R, He B. Lysine acetylation participates in boar spermatozoa motility and acrosome status regulation under different glucose conditions. Theriogenology 2020; 159:140-146. [PMID: 33152539 DOI: 10.1016/j.theriogenology.2020.10.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/21/2020] [Accepted: 10/21/2020] [Indexed: 12/22/2022]
Abstract
Efficient artificial insemination (AI) with liquid preserved boar semen is essential for the swine industry. Glucose is the most widely utilized energy source in refrigerated boar semen extenders. However, the relationship between glucose concentration and spermatozoa quality is not fully understood. In the present study, boar spermatozoa were used as a model to investigate the impact of different glucose concentrations on spermatozoa motility, mitochondrial activity, and acrosome integrity at physiological temperature (37 °C) and during refrigeration (17 °C). The proportion of progressively motile spermatozoa and mitochondrial activity in the high glucose group were significantly lower than in the low glucose group when incubated at 37 °C for 3 h or 17 °C for 3 d, but not at 17 °C for 7 d. Lysine acetylation is a reversible post-translational modification that plays a crucial role in spermatozoa function. Our results show that spermatozoa protein acetylation levels were higher in the high glucose group than in the low glucose group. The proportions of progressively motile and acrosome-intact spermatozoa were higher in acetyltransferase inhibitor (WM-1119)-treated spermatozoa than in the control. Spermatozoa acetyl-CoA concentration, which is directly linked to acetylation, was significantly higher in the high glucose group than in the low glucose group. Taken together, spermatozoa motility and acrosome integrity can be altered by changing the concentration of glucose in the extender. High glucose concentration-induced lysine acetylation participates in the regulation of boar spermatozoa motility and acrosome integrity during preservation. These results can provide insights into spermatozoa preservation and AI in the swine industry.
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Affiliation(s)
- Guo Chen
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Li Ren
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Zhanglin Chang
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Yuting Zhao
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Yanwen Zhang
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Dong Xia
- Shanghai Engineering Research Center of Breeding Pig, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, PR China
| | - Ruqian Zhao
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China; MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Bin He
- Key Laboratory of Animal Physiology & Biochemistry, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China; MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, PR China.
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6
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Dorado J, Hidalgo M, Acha D, Ortiz I, Bottrel M, Azcona F, Carrasco JJ, Gómez-Arrones V, Demyda-Peyrás S. Cryopreservation of Andalusian donkey (Equus asinus) spermatozoa: Use of alternative energy sources in the freezing extender affects post-thaw sperm motility patterns but not DNA stability. Anim Reprod Sci 2019; 208:106126. [PMID: 31405480 DOI: 10.1016/j.anireprosci.2019.106126] [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: 05/02/2019] [Revised: 06/29/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022]
Abstract
The aim of this study was to compare the effect of three sugars and Equex paste in a freezing extender for donkey sperm cryopreservation. Ejaculates (n = 18) were collected from six Andalusian donkeys of proven fertility were pooled (two ejaculates per pool) and cryopreserved using a freezing extender containing three different sugars (glucose, fructose and sorbitol), with or without the addition of Equex paste. Sperm quality was assessed before and after freezing-thawing for motility, morphology, plasma membrane integrity, acrosome integrity and DNA integrity. The use of sorbitol in the freezing extender improved total and progressive sperm motility (P < 0.05) and amplitude of lateral head displacement (P < 0.01), but it reduced the values for other sperm motility variables compared with glucose (P < 0.001). The use of fructose resulted in a reduction in values for most CASA variables (P < 0.05), whereas addition of Equex paste did not have any beneficial effect on values for these variables (P > 0.05). Glucose was more effective in maintaining sperm morphology (P < 0.05), while there was no beneficial effect with the addition of Equex paste (P > 0.05). Supplementation of fructose and Equex paste in the freezing extender decreased plasma membrane integrity (P < 0.05) as compared with glucose, but there were no differences between treatments for acrosome and DNA integrity (P > 0.05), even after 24 h of incubation. The use of different sugar sources in the extender could affect the in vitro post-thaw quality of cryopreserved donkey spermatozoa, with sorbitol being an interesting alternative for improving the sperm quality. Results of the present study indicate the use of Equex paste could negatively affect post-thaw outcomes for sperm viability in this species.
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Affiliation(s)
- J Dorado
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14071 Cordoba, Spain.
| | - M Hidalgo
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14071 Cordoba, Spain
| | - D Acha
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14071 Cordoba, Spain
| | - I Ortiz
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14071 Cordoba, Spain
| | - M Bottrel
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14071 Cordoba, Spain
| | - F Azcona
- IGEVET - Instituto de Genética Veterinaria "Ing. Fernando N. Dulout" (UNLP - CONICET LA PLATA), 1900 La Plata, Argentina; Department of Animal Production. Faculty of Veterinary Sciences. National University of La Plata, 1900 La Plata, Argentina
| | - J J Carrasco
- Equine Reproduction Center, Centro de Selección y Reproducción Animal (CENSYRA-Extremadura Government), 06007 Badajoz, Spain
| | - V Gómez-Arrones
- Equine Reproduction Center, Centro de Selección y Reproducción Animal (CENSYRA-Extremadura Government), 06007 Badajoz, Spain
| | - S Demyda-Peyrás
- IGEVET - Instituto de Genética Veterinaria "Ing. Fernando N. Dulout" (UNLP - CONICET LA PLATA), 1900 La Plata, Argentina; Department of Animal Production. Faculty of Veterinary Sciences. National University of La Plata, 1900 La Plata, Argentina; Department of Genetics, Faculty of Veterinary Medicine, University of Cordoba, 14071 Cordoba, Spain.
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7
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Yi YJ, Kamala-Kannan S, Lim JM, Oh BT, Lee SM. Effects of difructose dianhydride (DFA)-IV on in vitro fertilization in pigs. J Biomed Res 2017; 31:453-461. [PMID: 28958997 PMCID: PMC5706438 DOI: 10.7555/jbr.31.20160115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Difructose dianhydride IV (DFA-IV) is produced from levan, which is a natural polysaccharide that belongs to the fructan family, through the activity of levan fructotransferase (LF) derived from microorganisms. Recently, DFA-IV has been expected to have diverse applications in the food and medical industry. Here, we examined the potential application of DFA-IV forin vitro fertilization (IVF) in pigs. In the assessment of acrosomal integrity during incubation, intact acrosomal or viable spermatozoa were highly sustained in 0.1% or 0.25% DFA-IV (69.8%-70.8%,P<0.05). Reactive oxygen species (ROS) levels during sperm incubation decreased following the addition of DFA-IV, and 0.1%-0.5% DFA-IV in particular significantly decreased ROS production relative to that seen with no addition or 0.75% DFA-IV. Total fertilization (mono+ polyspermic oocyte) rate was significantly higher in the addition of 0.1% DFA-IV (94.2%) than with other concentrations (71.8%-86.7%,P<0.05). When using reduced IVF times and lower sperm numbers, we found that addition of 0.1%–0.5% DFA-IV significantly increased the fertilization rate (P<0.05). Fertilized oocytes treated with 0.1% DFA-IV exhibited higher embryonic development and blastocyst formation than those treated with other concentrations (P<0.05). Consequently, the addition of DFA-IV during IVF improved fertilization and embryonic development, suggesting the possible use of novel sugars for enhancement of assisted reproductive technology (ART) in mammals.
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Affiliation(s)
- Young-Joo Yi
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Korea.,Safety, Environment and Life Science Institute, Chonbuk National University, Iksan 54596, Korea
| | - S Kamala-Kannan
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Korea
| | - Jeong-Muk Lim
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Korea
| | - Byung-Taek Oh
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Korea
| | - Sang-Myeong Lee
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, Korea.,Safety, Environment and Life Science Institute, Chonbuk National University, Iksan 54596, Korea
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8
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Yeste M. Recent Advances in Boar Sperm Cryopreservation: State of the Art and Current Perspectives. Reprod Domest Anim 2016; 50 Suppl 2:71-9. [PMID: 26174922 DOI: 10.1111/rda.12569] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 06/05/2015] [Indexed: 01/04/2023]
Abstract
While sperm cryopreservation is the best technology to store boar semen for long-term periods, only 1% of all artificial inseminations (AI) conducted worldwide are made using frozen-thawed boar sperm. With the emergence of long-term extenders for liquid storage, the use of cryopreserved sperm in routine AI is less required. However, banks of boar semen contain cryopreserved sperm and planning inseminations in AI centres may benefit from the use of frozen-thawed semen. Therefore, there is an interest in the use of this technology to preserve boar sperm. In this regard, although the first attempts to cryopreserve boar semen date back to the seventies and this technology is still considered as optimal, some relevant improvements have been made in the last decade. After giving a general picture about boar sperm cryodamage, the present review seeks to shed light on these recent cryopreservation advances. These contributions regard to protein markers for predicting ejaculate freezability, sperm selection prior to start cryopreservation procedures, additives to freezing and thawing extenders, relevance of the AI-technique and insemination-to-ovulation interval. In conclusion, most of these progresses have allowed counteracting better boar sperm cryodamage and are thus considered as forward steps for this storage method. It is also worth noting that, despite being lower than fresh/extended semen, reproductive performance outcomes following AI with frozen-thawed boar sperm are currently acceptable.
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Affiliation(s)
- M Yeste
- Nuffield Department of Obstetrics and Gynaecology, Level 3, Women's Centre, John Radcliffe Hospital, University of Oxford, Headington, Oxford, UK
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9
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Funahashi H. Methods for Improving In Vitro and In Vivo Boar Sperm Fertility. Reprod Domest Anim 2016; 50 Suppl 2:40-7. [PMID: 26174918 DOI: 10.1111/rda.12568] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 06/05/2015] [Indexed: 11/30/2022]
Abstract
Fertility of boar spermatozoa is changed after ejaculation in vivo and in vitro. During processing for in vitro fertilization (IVF), although spermatozoa are induced capacitation, resulting in a high penetration rate, persistent obstacle of polyspermic penetration is still observed with a high incidence. For artificial insemination (AI), we still need a large number of spermatozoa and lose a majority of those in the female reproductive tract. Fertility of cryopreserved boar spermatozoa is still injured through freezing and thawing process. In the present brief review, factors affecting fertility of boar sperm during IVF, AI and cryopreservation are discussed in the context of discovering methodologies to improve it.
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Affiliation(s)
- H Funahashi
- Department of Animal Science, Okayama University, Okayama, Japan
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10
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Chanapiwat P, Olanratmanee EO, Kaeoket K, Tummaruk P. Conception rate and litter size in multiparous sows after intrauterine insemination using frozen-thawed boar semen in a commercial swine herd in Thailand. J Vet Med Sci 2014; 76:1347-51. [PMID: 24954517 PMCID: PMC4221167 DOI: 10.1292/jvms.14-0069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of the present study
was to determine the conception rate and litter size in sows after fixed time
intra-uterine insemination using frozen-thawed boar semen in a commercial swine herd in
Thailand. Sixty-nine Landrace multiparous sows were randomly allocated into two groups,
including control (n=36) and treatment (n=33). The control sows were inseminated with
extended fresh semen (3 × 109 motile sperm/dose, 100 ml) at
24, 36 and 48 hr after the onset of estrus. The treatment sows were inseminated with
frozen-thawed semen (2 × 109 motile sperm/dose, 20 ml) at 24
and 36 hr after induction of ovulation by human chorionic gonadotropin. All inseminations
were carried out by using an intra-uterine insemination technique. The time of ovulation
was determined by using transrectal real-time B-mode ultrasonography. The conception rate,
farrowing rate, total number of piglets born/litter (TB) and number of piglets born
alive/litter (BA) were evaluated. The sows inseminated with extended fresh semen yield a
higher TB (10.8 versus 9.0 piglets/l, P=0.015) and
tended to have a higher conception rate (88.9% versus 75.8%, P=0.150)
than sows inseminated with frozen-thawed semen. In conclusion, insemination using
frozen-thawed boar semen can be practiced with convinced fertility under field conditions
by fixed-time intrauterine insemination with 2 × 109 sperm/ dose of 20
ml at 24 and 36 hr after the onset of estrus.
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Affiliation(s)
- Panida Chanapiwat
- Semen Laboratory, Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Salaya, Nakorn-pathom 73170, Thailand
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11
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Cao H, Sun X, Li Q, Zhou S, Nan X, Hu J, Wang L, He Y. Testing Rhodiola sachalinensis saccharide as cryoprotectant for bovine spermatozoa. J Dairy Sci 2013; 96:6965-6972. [DOI: 10.3168/jds.2013-6623] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 06/29/2013] [Indexed: 11/19/2022]
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12
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Okazaki T, Ikoma E, Tinen T, Akiyoshi T, Mori M, Teshima H. Addition of oxytocin to semen extender improves both sperm transport to the oviduct and conception rates in pigs following AI. Anim Sci J 2013; 85:8-14. [DOI: 10.1111/asj.12089] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 03/13/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Tetsuji Okazaki
- Smaller Livestock and Environment Section; Livestock Research Institute; Oita Prefectural Agriculture, Forestry and Fisheries Research Center; Bungo-ono Oita Japan
| | - Erena Ikoma
- Livestock Research Institute; Kagoshima Prefectural Institute for Agricultural Development; Kirishima Kagoshima Japan
| | - Tukasa Tinen
- Okinawa Prefectural Livestock and Grassland Research Center; Nakijin Okinawa Japan
| | - Teiichi Akiyoshi
- Smaller Livestock and Environment Section; Livestock Research Institute; Oita Prefectural Agriculture, Forestry and Fisheries Research Center; Bungo-ono Oita Japan
| | - Manabu Mori
- Smaller Livestock and Environment Section; Livestock Research Institute; Oita Prefectural Agriculture, Forestry and Fisheries Research Center; Bungo-ono Oita Japan
| | - Hisanori Teshima
- Smaller Livestock and Environment Section; Livestock Research Institute; Oita Prefectural Agriculture, Forestry and Fisheries Research Center; Bungo-ono Oita Japan
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13
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Okazaki T, Shimada M. New strategies of boar sperm cryopreservation: development of novel freezing and thawing methods with a focus on the roles of seminal plasma. Anim Sci J 2012; 83:623-9. [PMID: 22943528 DOI: 10.1111/j.1740-0929.2012.01034.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cryopreservation of boar spermatozoa offers an effective means of long-term storage of important genetic material. Many researchers have investigated how to improve reproductive performance by artificial insemination (AI) using cryopreserved boar spermatozoa. Recently, we and other groups reported that high conception rates (70-80%) can be achieved by AI with frozen-thawed boar spermatozoa using a modified temperature program during freezing, or a novel cryopreservation extender to improve sperm quality (including sperm survivability, motility, membrane status and fertilization ability) after thawing, or a novel sperm infusion method, deep intra uterine insemination. However, these techniques have not yet been used for commercial pig production. The variation in sperm freezability among boars or among ejaculations in an identical boar is one of the main reasons for this problem. In our previous study, it was revealed that some components of seminal plasma have a negative effect on the freezability of boar sperm. One of these factors is bacteria-released endotoxin (lipopolysaccharide: LPS). LPS binds to Toll-like receptor-4 (TLR-4) expressed on the sperm surface, resulting in induction of apoptosis. On the other hand, seminal plasma suppresses cryo-capacitation induced by thawing stress. On the basis of these findings, we designed a novel protocol of AI using frozen-thawed boar sperm.
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Affiliation(s)
- Tetsuji Okazaki
- Smaller Livestock and Environment Section, Livestock Research Institute, Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Oita
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