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Saratsi A, Samartzi F, Panagiotidis I, Basioura A, Tsiokos D, Ligda C, Rekkas CA. Post-Thaw Parameters of Buck Semen Quality after Soy Lecithin Extender Supplementation with Fumaric Acid. Vet Sci 2023; 10:569. [PMID: 37756091 PMCID: PMC10534350 DOI: 10.3390/vetsci10090569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/23/2023] [Accepted: 09/07/2023] [Indexed: 09/28/2023] Open
Abstract
The supplementation of cryopreservation media with antioxidants improves the post-thaw quality and fertilizing ability of spermatozoa. To maximize the fertility of frozen-thawed buck spermatozoa, further research is required to overcome obstacles that have yielded controversial results and standardize protocols. In the present work, the effect of adding fumaric acid (a well-described antioxidant) to a soy lecithin semen extender on certain quality parameters of spermatozoa following freezing and thawing was examined for the first time. Five sexually mature Skopelos bucks were used, and ejaculates were collected with an artificial vagina. The semen samples (98 samples, five replicates) were diluted (400 × 106 spermatozoa/mL) with OviXcell®, supplemented with fumaric acid (0 mM, 2.15 mM, 10 mM or 30 mM), equilibrated (5 °C; 3 h), packed (0.5 mL straws), frozen and stored (-196 °C) until further processing. After thawing, the spermatozoa total and progressive motility (CASA), viability (eosin-nigrosin), membrane functional integrity (HOST), acrosome integrity (SpermBlue®) and mitochondrial function (Rhodamine-123/SYBR-14/PI) were evaluated. Statistical analysis was performed with one-way ANOVA, followed by Duncan's test; significance was set at 0.05. The addition of 2.15 mM fumaric acid improved (p < 0.05) spermatozoa viability, membrane functional integrity, acrosome integrity and mitochondrial function compared to all other concentrations. The addition of 30 mM fumaric acid decreased (p < 0.05) spermatozoa viability and mitochondrial function compared to all other concentrations. These results indicate a beneficial effect of a 2.15 mM fumaric acid addition to a soy lecithin extender on post-thaw buck spermatozoa quality. Further research is required to evaluate the in vivo fertility of frozen-thawed buck spermatozoa treated with fumaric acid, as well as to elucidate the mechanism of action of fumaric acid in spermatozoa.
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Affiliation(s)
- Aikaterini Saratsi
- Veterinary Research Institute, Hellenic Agricultural Organization—DIMITRA, ELGO Campus, 57001 Thermi-Thessaloniki, Greece; (A.S.); (F.S.); (C.L.)
| | - Foteini Samartzi
- Veterinary Research Institute, Hellenic Agricultural Organization—DIMITRA, ELGO Campus, 57001 Thermi-Thessaloniki, Greece; (A.S.); (F.S.); (C.L.)
| | - Ioannis Panagiotidis
- Department of Animal Reproduction & Artificial Insemination, Directorate of Veterinary Center of Thessaloniki, Ministry of Rural Development and Food, 9 Verias Str., 57008 Thessaloniki, Greece;
| | - Athina Basioura
- Department of Agriculture, University of Western Macedonia, Terma Kontopoulou, 53100 Florina, Greece;
| | - Dimitrios Tsiokos
- Research Institute of Animal Science, Hellenic Agricultural Organization—DIMITRA, 58100 Paralimni Giannitsa, Greece;
| | - Christina Ligda
- Veterinary Research Institute, Hellenic Agricultural Organization—DIMITRA, ELGO Campus, 57001 Thermi-Thessaloniki, Greece; (A.S.); (F.S.); (C.L.)
| | - Constantinos A. Rekkas
- Veterinary Research Institute, Hellenic Agricultural Organization—DIMITRA, ELGO Campus, 57001 Thermi-Thessaloniki, Greece; (A.S.); (F.S.); (C.L.)
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Wojtusik J, Roth TL, Curry E. Case Studies in Polar Bear (Ursus maritimus) Sperm Collection and Cryopreservation Techniques. Animals (Basel) 2022; 12:ani12040430. [PMID: 35203138 PMCID: PMC8868262 DOI: 10.3390/ani12040430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary Polar bears are threatened by habitat loss, decreased food availability, and reduced reproductive success due to climate change. Zoo populations can support species survival through preservation of genetic diversity and maintenance of insurance populations, but in the US, the zoo polar bear population is currently not sustainable. The development of sperm collection and cryopreservation can help to support the population by providing the biomaterial needed for assisted reproductive techniques, such as artificial insemination. However, these procedures are not well described for polar bears. Data from 38 opportunistic sperm collections, that were conducted between 2011 and 2021, were assessed to establish best practices to date for collecting and preserving polar bear sperm. The information gathered demonstrates that urethral catheterization is an efficient method of sperm collection, sperm can be rescued postmortem from the vasa deferentia and epididymides, and polar bear sperm collection appears to be most effective during the breeding season. Furthermore, polar bear sperm can survive cryopreservation. Further studies will optimize these techniques, but this summary provides information that is immediately applicable to enhancing sample collection and cryopreservation success that could support the long-term genetic management of polar bears in zoos. Abstract Assisted reproductive technologies can aid conservation efforts via support of ex situ population management and preservation of genetic material. Data from 38 sperm collection attempts from 17 polar bears (1–5 procedures/bear) were evaluated. Sample collections were attempted via electroejaculation (EEJ; n = 6), urethral catheterization (UC; n = 25), or sperm rescue (SR; n = 7) during the breeding season (Jan. 1-May 21; n = 27) and nonbreeding season (May 22-Dec. 31; n = 11). Sperm retrieval was successful in 1 EEJ (16.7%), 18 UC (72.0%) and 4 SR (57.1%) collections. Initial sperm motility and viability were 50.0% and 77.0% for EEJ, 64.3 ± 7.4% and 80.9 ± 3.8% for UC, and 56.7 ± 8.8% and 80.5 ± 0.5% for SR. UC and SR were more likely to be successful during the breeding season (84.2–100%) than the nonbreeding season (25.0–33.3%). Testicular tumors were observed in four males (57%) during SR. In total, 13 samples were cryopreserved (n = 1 EEJ, 9 UC, and 3 SR) with egg-yolk-based equine extender (EQ) or OptiXcell (OP). For both extenders, post-thaw motility and viability were reduced by 20–60% and 30–65%, respectively. Further efforts to optimize procedures are warranted, but this summary provides data useful for enhancing the success of polar bear sperm collection and cryopreservation.
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Alvarez-Rodriguez M, Martinez CA, Roca J, Rodriguez-Martinez H. mRNA expression of oxidative-reductive proteins in boars with documented different fertility can identify relevant prognostic biomarkers. Res Vet Sci 2021; 141:195-202. [PMID: 34763256 DOI: 10.1016/j.rvsc.2021.10.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 09/27/2021] [Accepted: 10/28/2021] [Indexed: 11/20/2022]
Abstract
Oxidative stress unbalance is a major factor causing impairment of sperm function and, ultimately, sperm death. In this study, we identified transcriptomic and proteomic markers for oxidative-related protectors from the generation of reactive oxygen species (ROS) in spermatozoa from breeding boars with documented high- or low-fertility. Particular attention was paid to glutathione peroxidases, and to transcripts related to DNA stabilization and compaction, as protamine and transition proteins. mRNA cargo analysis was performed using porcine-specific micro-arrays (GeneChip® miRNA 4.0 and GeneChip® Porcine Gene 1.0 ST) and qPCR validation. Differences between fertility-classed boars were ample among biomarkers; some upregulated only at protein level (catalase (CAT), superoxide dismutase 1 (SOD1) and glutathione proteins), or only at the mRNA level (ATOX1, Antioxidant Protein 1). In addition, protamines 2 and 3, essential for sperm DNA condensation and also transition proteins 1 and 2 (TNP1 and TNP2), required during histone-to-protamine replacement, were overexpressed in spermatozoa from high-fertile boars. This up-regulation seems concerted to reduce DNA accessibility to ROS attack, protecting the DNA. The upregulated intracellular phospholipid hydroperoxide glutathione peroxidase (GPx4), in high-fertile boars at mRNA level, can be considered a most relevant biomarker for fertility disclosure during sperm evaluation.
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Affiliation(s)
- Manuel Alvarez-Rodriguez
- Department of Biomedical & Clinical Sciences (BKV), BKH/Obstetrics & Gynecology, Faculty of Medicine and Health Sciences, Linköping University, SE-58185 Linköping, Sweden; Department of Animal Health and Anatomy, Universitat Autònoma de Barcelona, 08193, Bellaterra, (Cerdanyola del Vallès), Barcelona, Spain.
| | - Cristina A Martinez
- Department of Biomedical & Clinical Sciences (BKV), BKH/Obstetrics & Gynecology, Faculty of Medicine and Health Sciences, Linköping University, SE-58185 Linköping, Sweden
| | - Jordi Roca
- Department of Medicine and Animal Surgery, Faculty of Veterinary Medicine, International Campus for Higher Education and Research "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain
| | - Heriberto Rodriguez-Martinez
- Department of Biomedical & Clinical Sciences (BKV), BKH/Obstetrics & Gynecology, Faculty of Medicine and Health Sciences, Linköping University, SE-58185 Linköping, Sweden
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Sun L, He M, Wu C, Zhang S, Dai J, Zhang D. Beneficial Influence of Soybean Lecithin Nanoparticles on Rooster Frozen-Thawed Semen Quality and Fertility. Animals (Basel) 2021; 11:ani11061769. [PMID: 34199159 PMCID: PMC8231592 DOI: 10.3390/ani11061769] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary Soy lecithin (SL) can be used in to prevent spermatozoa cryodamage during cryopreservation by mitigating the efflux of cholesterol or phospholipids, thus reducing the formation of intracellular ice crystals. SL nanoparticles (nano-SL) have a smaller particle size and higher solubilizing capacity as compared with those that have not undergone nanotreatment. Thus, they allow for a better interaction or coating of sperm, decreasing cold shock injury during freezing–thawing processes. The objective of this study was to determine the optimal concentration of nano-SL. In order to achieve this, we assessed the quality of frozen–thawed semen in vitro and in vivo. We found that a nano-SL dosage of 1.0% in the semen extender had an affirmative influence on post-thawing quality in roosters, improving various parameters related to sperm motion, protecting the membrane and acrosome integrities, increasing mitochondrial activity and antioxidant capacity, and reducing the oxidative stress caused by the cryopreservation process. Moreover, enrichment of 1.0% nano-SL in the semen extender improved the fertilizing capacity of rooster sperm after artificial insemination. Abstract The present study aimed to investigate the impact of different concentrations (0%, 0.5%, 1.0%, 1.5%, and 2.0%) of nano-soybean lecithin (SL) in the extender on sperm quality, sperm motion characteristics, and fertility outcomes of post-thawed rooster semen. Adult Ross broiler breeder roosters (n = 20) were subjected to semen collections twice a week for three weeks. At each collection, semen samples were pooled and allocated into five treatments corresponding to different nano-SL concentrations (control, SL0.5, SL1.0, SL1.5, and SL2.0). Sperm parameters, including motility (collected using a computer-assisted sperm analysis system), plasma membrane and acrosome integrities, and mitochondrial activity were assessed. Sperm malondialdehyde (MDA) and antioxidant activities (total antioxidant capacity (TAC); superoxide dismutase (SOD); glutathione peroxidase (GPx)) were evaluated. The fertility and hatchability obtained with frozen–thawed rooster semen supplemented with the optimum nano-SL concentration were assessed after artificial insemination. The results showed that the addition of 1% nano-SL into the extender led to a higher semen motility in roosters, improved plasma membrane and acrosome integrities, and higher mitochondrial activity of post-thawed rooster semen in comparison to controls (p < 0.05). The MDA levels in the SL0.5 and SL1.0 groups were lower than the other groups (p < 0.05). TAC activities in SL0.5, SL1.0, and SL1.5 groups were significantly higher than those in the other groups (p < 0.05). It was observed that the concentration of SOD was higher in the SL1.0 group than in the other groups (p < 0.05). The activity of GPx was not influenced in any of the cases (p > 0.05). Moreover, the percentages of fertility and hatchability in the SL1.0 group were higher (56.36% and 58.06%) than those in the control group (42.72% and 40.43%). In summary, the addition of nano-SL to the extenders enhanced the post-thawed semen quality and fertility of roosters by reducing the level of oxidative stress. The optimum nano-SL concentration was 1.0%. These results may be beneficial for improving the efficacy of semen cryopreservation procedures in poultry breeding.
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Affiliation(s)
- Lingwei Sun
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; (L.S.); (M.H.); (C.W.); (S.Z.)
- Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai 201106, China
| | - Mengqian He
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; (L.S.); (M.H.); (C.W.); (S.Z.)
- Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai 201106, China
| | - Caifeng Wu
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; (L.S.); (M.H.); (C.W.); (S.Z.)
- Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai 201106, China
| | - Shushan Zhang
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; (L.S.); (M.H.); (C.W.); (S.Z.)
- Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai 201106, China
| | - Jianjun Dai
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; (L.S.); (M.H.); (C.W.); (S.Z.)
- Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai 201106, China
- Correspondence: (J.D.); (D.Z.)
| | - Defu Zhang
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; (L.S.); (M.H.); (C.W.); (S.Z.)
- Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-Genetics and Breeding, Shanghai 201106, China
- Correspondence: (J.D.); (D.Z.)
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Sun L, Fan W, Wu C, Zhang S, Dai J, Zhang D. Effect of substituting different concentrations of soybean lecithin and egg yolk in tris-based extender on goat semen cryopreservation. Cryobiology 2020; 92:146-150. [PMID: 31883445 DOI: 10.1016/j.cryobiol.2019.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 12/24/2019] [Accepted: 12/24/2019] [Indexed: 11/29/2022]
Abstract
This study aimed to investigate the effects of different concentrations of soybean lecithin (SL; 0.5%, 1%, and 1.5%) and egg yolk (EY) in Tris-based extenders on the semen quality parameters of post-thawed goat semen. Sixteen ejaculates were collected from eight healthy, mature Chongming White goats (3-5 years of age). Each ejaculate was divided into five equal aliquots, and then each pellet was diluted with one of the five Tris-based extenders containing 20% EY, 0.5% SL, 1% SL, 2% SL, or 3% SL. The cooled diluted semen was loaded into 0.5 mL polyvinyl French straws and cryopreserved in liquid nitrogen. Frozen semen samples were thawed at 37 °C and assessed for sperm motility, viability, plasma acrosome integrity, membrane integrity, and mitochondria integrity, and the spermatozoa were assessed for reactive oxygen species (ROS), superoxide dismutase (SOD), and malondialdehyde (MDA). The semen extended in the 2.0% SL extract tended to have a higher sperm viability (57.44%), motility (52.14%), membrane integrity (45.31%), acrosome integrity (52.96%), and mitochondrial activity (50.21%) than the other SL-based extender concentrations (P < 0.05). The 2.0% SL treatment group was equivalent to the semen extended in 20% EY (P > 0.05). The extenders supplemented 20% EY or 2.0% SL significantly increased the SOD activity and decreased the ROS and MDA activities compared to the other groups (P < 0.05). In conclusion, the extenders supplemented with 20% EY and 2.0% SL had similar effects on spermatozoa preservation. These results indicate that a soybean lecithin-based diluent may be used as an alternative extender to egg yolk for the cryopreservation of goat semen.
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Affiliation(s)
- Lingwei Sun
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China; Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-genetics and Breeding, Shanghai, 201106, China
| | - Wenhua Fan
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China; Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-genetics and Breeding, Shanghai, 201106, China
| | - Caifeng Wu
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China; Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-genetics and Breeding, Shanghai, 201106, China
| | - Shushan Zhang
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China; Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-genetics and Breeding, Shanghai, 201106, China
| | - Jianjun Dai
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China; Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-genetics and Breeding, Shanghai, 201106, China.
| | - Defu Zhang
- Institute of Animal Science and Veterinary Medicine, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China; Division of Animal Genetic Engineering, Shanghai Municipal Key Laboratory of Agri-genetics and Breeding, Shanghai, 201106, China.
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Ondřej Š, Jiří Š, Jan B, Pavla MP, Lucie T, Doležalová M, Petra F, Luděk S, Radko R. Low Density Lipoprotein - important player in increasing cryoprotective efficiency of soybean lecithin-based bull semen extenders. Anim Reprod 2019; 16:267-276. [PMID: 33224286 PMCID: PMC7673600 DOI: 10.21451/1984-3143-ar2018-0107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Currently, considering cryopreservation of bull semen, there is no clear consensus over the comparability of cryoprotective efficacy of extenders with soybean lecithin and those based on egg yolk. The objective of this study was to prove the use of Low Density Lipoprotein (LDL) extracted from hen-egg yolk as an enhancing factor for soybean lecithin-based extenders. In total, 35 ejaculates of (seven bulls x five ejaculates per bull) were collected and cryopreserved at a commercial insemination centre. The effect of the LDL addition to the extenders AndroMed® and Bioxcell® was tested in a 6% (v/v) concentration on spermatozoa after thawing. Modified extender composition effects were assessed on sperm functional parameters motility, plasma membrane, mitochondrial membrane potential and acrosomal integrity after thawing by CASA, flow cytometry and fluorescent microscopy, respectively. Based on kinematic parameters determined from CASA, k-means cluster analysis was used to classify individual spermatozoon into specific subpopulations (fast, medium fast and slow). A subpopulation of fast spermatozoa was increased in the presence of LDL in both selected extenders (P < 0.05). Moreover, the positive effect of LDL on sperm motility was confirmed by decreasing the percentage of sperm in slow subpopulation (P < 0.05). The effect of LDL addition on the incidence of spermatozoa with intact plasma membrane was not demonstrated in any case of extender used (P > 0.05). The percentage of sperm with intact acrosome was improved when LDL was added to Bioxcell® extender (P < 0.05). On the other hand, addition of LDL to AndroMed® extender improved mitochondrial intactness after thawing (P < 0.05). In conclusion, our results showed that adding LDL to selected soybean lecithin-based extenders considerably ameliorated the functional parameters of spermatozoa after thawing and thus this lipoprotein could represent an improving agent for soybean lecithin-based extender for bull semen cryopreservation.
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Affiliation(s)
- Šimoník Ondřej
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic.,Institute of Biotechnology of the Czech Academy of Sciences, Laboratory of Reproductive Biology, v.v.i., Biocev, Průmyslová, Czech Republic
| | - Šichtař Jiří
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Beran Jan
- Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic.,Department of Zootechnical Sciences, Faculty of Agriculture, University of South Bohemia in České Budějovice, České Budějovice, Czech Republic
| | - Maňásková-Postlerová Pavla
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic.,Institute of Biotechnology of the Czech Academy of Sciences, Laboratory of Reproductive Biology, v.v.i., Biocev, Průmyslová, Czech Republic
| | - Tůmová Lucie
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Martina Doležalová
- Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Folková Petra
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Stádník Luděk
- Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Rajmon Radko
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic
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Anel-López L, Ortega-Ferrusola C, Martínez-Rodríguez C, Álvarez M, Borragán S, Chamorro C, Peña FJ, Anel L, de Paz P. Analysis of seminal plasma from brown bear (Ursus arctos) during the breeding season: Its relationship with testosterone levels. PLoS One 2017; 12:e0181776. [PMID: 28771486 PMCID: PMC5542667 DOI: 10.1371/journal.pone.0181776] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 07/06/2017] [Indexed: 02/06/2023] Open
Abstract
Seminal plasma (SP) plays an important role in the motility, viability and maintenance of the fertilizing capacity of mammalian spermatozoa. This study is the first on brown bear (Ursus arctos) SP components, and has two main objectives: 1) to define the SP composition in bear ejaculate and 2) to identify variations in SP composition in relation to high and low levels of testosterone in serum during the breeding season. Forty-eight sperm samples from 30 sexually mature male brown bears (Ursus arctos) were obtained by electroejaculation, and their serum testosterone levels were assessed to sort the animals into 2 groups (high and low testosterone levels, threshold 5 ng/dl). The biochemical and protein compositions of the SP samples were assessed, and sperm motility was analyzed. We found that lactate dehydrogenase was significantly higher in the low-serum-testosterone samples, while concentrations of lipase and Mg+ values were significantly higher in the high-serum-testosterone samples. In contrast, sperm motility did not significantly differ (P>0.05) between the testosterone level groups (total motility: 74.42.8% in the high-level group vs. 77.1±4.7% in the low-level group). A reference digital model was constructed since there is no information for this wild species. To do this, all gel images were added in a binary multidimensional image and thirty-three spots were identified as the most-repeated spots. An analysis of these proteins was done by qualitative equivalency (isoelectric point and molecular weight) with published data for a bull. SP protein composition was compared between bears with high and low serum testosterone, and three proteins (binder of sperm and two enzymes not identified in the reference bull) showed significant (P<0.05) quantitative differences. We conclude that male bears with high or low serum testosterone levels differs only in some properties of their SP, differences in enzyme LDIP2, energy source LACT2, one protein (similar to BSP1) and Mg ion were identified between these two groups. These data may inform the application of SP to improve bear semen extenders.
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Affiliation(s)
- L. Anel-López
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- * E-mail:
| | - C. Ortega-Ferrusola
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
| | - C. Martínez-Rodríguez
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- Molecular Biology (Cell Biology), University of León, León, Spain
| | - M. Álvarez
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
| | | | - C. Chamorro
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- Veterinary Anatomy, University of León, León, Spain
| | - F. J. Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - L. Anel
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
| | - P. de Paz
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- Molecular Biology (Cell Biology), University of León, León, Spain
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Ansari MS, Rakha BA, Akhter S. Cryopreservation of Nili-Ravi buffalo (Bubalus bubalis) semen in AndroMed ® extender; in vitro and in vivo evaluation. Reprod Domest Anim 2017; 52:992-997. [PMID: 28660630 DOI: 10.1111/rda.13008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 05/11/2017] [Indexed: 11/28/2022]
Abstract
The study was designed to evaluate AndroMed® for the freezability and fertility of Nili-Ravi buffalo semen. Semen was collected from four adult Nili-Ravi buffalo (Bubalus bubalis) bulls for 3 weeks (replicate). Semen ejaculates from each buffalo bull were divided into three aliquots. One aliquot was used for evaluation of motility, plasma membrane integrity, livability, viability, DNA integrity and normal apical ridge. Remaining two aliquots were diluted (37°C; 50 × 106 spermatozoa/ml) in tris-citric egg yolk or AndroMed® extender and cryopreserved in 0.5 ml French straws. After thawing, per cent post-thaw motility (47.9 ± 0.8, 49.2 ± 1.7), plasma membrane integrity (44.4 ± 1.2, 46.8 ± 1.8) and normal apical ridge (81.4 ± 0.3, 83.2 ± 0.3) were recorded similar (p > .05) in tris-citric egg yolk and AndroMed® extender. Higher (p < .05) percentage of sperm livability (70.5 ± 1.4 and 64.4 ± 1.0), viability (67.5 ± 1.5 and 61.5 ± 0.6) and DNA integrity (97.0 ± 0.3 and 93.4 ± 0.21) were recorded in AndroMed® compared to tris-citric egg yolk post-thaw. Values for all the aforementioned spermatozoal quality parameters were observed lower (p < .05) in frozen-thawed compared to fresh semen irrespective of the experimental extenders. Fertility rates of buffalo semen did not differ (p > .05) either cryopreserved in tris-citric egg yolk or AndroMed® extender (45.5% vs. 49%). It is concluded that AndroMed® is capable in protecting the buffalo bull sperm during freeze-thawing process and can be adopted safely for routine use replacing the tris-citric egg yolk extender in artificial insemination programme.
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Affiliation(s)
- M S Ansari
- Department of Zoology, University of Sargodha, Lyallpur Campus, Faislabad, Pakistan.,Department of Zoology, University of Gujrat, Gujrat, Pakistan
| | - B A Rakha
- Department of Wildlife Management, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
| | - S Akhter
- Department of Zoology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
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9
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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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10
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Souza ALP, Lima GL, Peixoto GCX, de Souza Castelo T, Oliveira MGC, de Paula VV, Silva AR. Sperm characteristics following freezing in extenders supplemented with whole egg yolk and different concentrations of low-density lipoproteins in the collared peccary (Pecari tajacu). Reprod Biol 2015; 15:223-8. [DOI: 10.1016/j.repbio.2015.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 10/06/2015] [Accepted: 10/07/2015] [Indexed: 11/28/2022]
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11
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Liu CH, Dong HB, Ma DL, Li YW, Han D, Luo MJ, Chang ZL, Tan JH. Effects of pH during liquid storage of goat semen on sperm viability and fertilizing potential. Anim Reprod Sci 2015; 164:47-56. [PMID: 26612188 DOI: 10.1016/j.anireprosci.2015.11.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 10/16/2015] [Accepted: 11/06/2015] [Indexed: 11/29/2022]
Abstract
A specific problem in goat semen preservation is the detrimental effect of seminal plasma on sperm viability in extenders containing yolk or milk. Thus, the use of chemically defined extenders will have obvious advantages. Although previous studies indicate that the initial pH of an extender is crucial to sustain high sperm motility, changes in extender pH during long-term semen storage have not been observed. Monitoring extender pH at different times of semen storage and modeling its variation according to nonlinear models is thus important for protocol optimization for long-term liquid semen preservation. The present results showed that during long-term liquid storage of goat semen, both sperm motility and semen pH decreased gradually, and a strong correlation was observed between the two. Whereas increasing the initial extender pH from 6.04 to 6.25 or storage with stabilized pH improved, storage with artificially lowered pH impaired sperm motility. Extender renewal improved sperm motility by maintaining a stable pH. Sperm coating with chicken (Gallus gallus) egg yolk improved motility by increasing tolerance to pH decline. A new extender (n-mZAP) with a higher buffering capacity was formulated, and n-mZAP maintained higher sperm motility, membrane integrity and acrosome intactness than the currently used mZAP extender did. Goat semen liquid-stored for 12 d in n-mZAP produced pregnancy and kidding rates similar to those obtained with freshly collected semen following artificial insemination. In conclusion, maintenance of a stable pH during liquid semen storage dramatically improved sperm viability and fertilizing potential.
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Affiliation(s)
- Chang-He Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China
| | - Hai-Bo Dong
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China
| | - Dong-Li Ma
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China
| | - You-Wei Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China
| | - Dong Han
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China
| | - Ming-Jiu Luo
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China
| | - Zhong-Le Chang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China.
| | - Jing-He Tan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City 271018, P.R. China.
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12
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Mata-Campuzano M, Álvarez-Rodríguez M, Álvarez M, Tamayo-Canul J, Anel L, de Paz P, Martínez-Pastor F. Post-thawing quality and incubation resilience of cryopreserved ram spermatozoa are affected by antioxidant supplementation and choice of extender. Theriogenology 2015; 83:520-8. [DOI: 10.1016/j.theriogenology.2014.10.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 10/09/2014] [Accepted: 10/11/2014] [Indexed: 10/24/2022]
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13
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Refrigerated storage of ram sperm in presence of Trolox and GSH antioxidants: Effect of temperature, extender and storage time. Anim Reprod Sci 2014; 151:137-47. [DOI: 10.1016/j.anireprosci.2014.10.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/26/2014] [Accepted: 10/02/2014] [Indexed: 02/02/2023]
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14
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Different concentrations of cysteamine and ergothioneine improve microscopic and oxidative parameters in ram semen frozen with a soybean lecithin extender. Cryobiology 2014; 69:68-73. [DOI: 10.1016/j.cryobiol.2014.05.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 04/28/2014] [Accepted: 05/10/2014] [Indexed: 11/15/2022]
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15
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Gomes-Alves S, Alvarez M, Nicolas M, Lopez -Urueña E, Martínez-Rodríguez C, Borragan S, de Paz P, Anel L. Use of commercial extenders and alternatives to prevent sperm agglutination for cryopreservation of brown bear semen. Theriogenology 2014; 82:469-74. [DOI: 10.1016/j.theriogenology.2014.05.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 05/09/2014] [Accepted: 05/12/2014] [Indexed: 11/30/2022]
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