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Cinar B, Bollwein H, Siuda M, Lautner M, Leiding C, Malama E. Impact of bull age, sperm processing, and microclimatic conditions on the viability and DNA integrity of cryopreserved bovine sperm. Reprod Fertil Dev 2024; 36:RD23219. [PMID: 38713807 DOI: 10.1071/rd23219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 04/11/2024] [Indexed: 05/09/2024] Open
Abstract
Context Seasonal microclimatic fluctuations can cause changes in sperm quality even in dairy bulls bred under temperate climate. These changes can vary between sires of different age and affect sperm freezability. Aims We aimed to evaluate the modulating effect of bull age and equilibration time before freezing on the seasonal pattern of sperm viability and DNA integrity post-thaw. Methods In the frame of systematic sperm quality control, we assessed the integrity of sperm plasma membrane and acrosome (PMAI) in 15,496 cryopreserved bovine batches, and the percentage of sperm with high DNA fragmentation index (%DFI) after 0h and 3h incubation at 38°C post-thaw (3h) in 3422 batches. Semen was equilibrated for 24h before freezing if collected on Monday or Wednesday and 72h if produced on Friday. We investigated the effect of season, bull age, equilibration, and temperature-humidity index (THI) on the day of semen collection on sperm traits using mixed-effects linear models. Key results PMAI and %DFI (0h and 3h) deteriorated with increasing THI. The effect of THI on %DFI was detected with a 30-day time lag. Seasonal fluctuations of sperm quality were similar between young, mature, and older sires. Prolonged equilibration did not affect PMAI but was linked to elevated %DFI (3h) in summer. Conclusions Extending equilibration from 24 to 72h is compatible with commercial standards of bovine sperm quality post-thaw; however, it could interfere with the seasonal pattern of the latter. Implications Systematic monitoring of bovine sperm quality enables the prompt detection of stress factors related to microclimate and semen processing.
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Affiliation(s)
- Burcu Cinar
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, Zurich 8057, Switzerland
| | - Heinrich Bollwein
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, Zurich 8057, Switzerland
| | - Mathias Siuda
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, Zurich 8057, Switzerland
| | - Matthias Lautner
- Besamungsverein Neustadt a.d. Aisch e.V., Karl-Eibl-Straße 17-27, Neustadt a.d. Aisch 91413, Germany
| | - Claus Leiding
- Besamungsverein Neustadt a.d. Aisch e.V., Karl-Eibl-Straße 17-27, Neustadt a.d. Aisch 91413, Germany
| | - Eleni Malama
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, Zurich 8057, Switzerland
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Pieper L, Meschede T, Jung M, Janowitz U, Schulze M. Influence of Equilibration Time and Bull-Specific Extender for Cryopreservation on Semen Quality and Fertility in German Holstein Friesian Bulls: A Controlled Field Trial. Animals (Basel) 2023; 13:2285. [PMID: 37508061 PMCID: PMC10376470 DOI: 10.3390/ani13142285] [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: 06/19/2023] [Revised: 07/06/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Equilibration with an extender is necessary to allow cryopreservation of bovine sperm. The aim of trial 1 was to assess the effect of 24 h versus 4 h equilibration time with three different extenders on sperm quality and to select the preferred extender for each bull. The aim of trial 2 was to investigate the effect of using a 24 h equilibration time with a bull-specific extender on field fertility. For trial 1, three ejaculates each from eight Holstein Friesian breeding bulls were used as the split-sample, including two equilibration times (4 h and 24 h) and three extenders (BioXcell, Triladyl, and OptiXcell). For trial 2, from 5 to 10 ejaculates from the same bulls were collected and treated (split-sample) as BioXcell with 4 h equilibration and either Triladyl or OptiXcell, both with 24 h equilibration. A total of 11,059 straws were used for insemination of cows and heifers. For Triladyl, progressive sperm motility, acrosome defects, and plasma membrane and acrosome integrity improved with a 24 h compared to a 4 h equilibration time. Four bulls each were used with Triladyl and OptiXcell for trial 2. In trial 2, non-return rates did not differ among groups. Therefore, using a 24 h equilibration time might improve in vitro sperm parameters, depending on the extender used. Moreover, it would be possible to change from 4 h to 24 h equilibration time without impairing field fertility.
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Affiliation(s)
- Laura Pieper
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321 Bernau, Germany
| | - Tristan Meschede
- Rinder-Union West eG, Schifffahrter Damm 235a, D-48147 Muenster, Germany
| | - Markus Jung
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321 Bernau, Germany
| | - Ulrich Janowitz
- Rinder-Union West eG, Schifffahrter Damm 235a, D-48147 Muenster, Germany
| | - Martin Schulze
- Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321 Bernau, Germany
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3
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Salman A, Fernández-Alegre E, Francisco-Vázquez R, Gómez-Martín R, Fernández-Fernández A, Areán-Dablanca H, Domínguez JC, González-Montaña JR, Caamaño JN, Martínez-Pastor F. Extension of the equilibration period up to 24 h maintains the post-thawing quality of Holstein bull semen frozen with OPTIXcell®. Anim Reprod Sci 2023; 250:107209. [PMID: 36889162 DOI: 10.1016/j.anireprosci.2023.107209] [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: 12/19/2022] [Revised: 02/27/2023] [Accepted: 02/27/2023] [Indexed: 03/04/2023]
Abstract
Semen cryopreservation in bovine livestock is well established, but logistics often require deviations from standard protocols. Extending the equilibration time to the following day is convenient in many situations. To improve our knowledge of the effects of this modification, we studied the post-thawing and post-incubation (4 h, 38 °C) sperm quality after freezing with 4 or 24-h extension in the OPTIXcell extender by using an ample panel of analyses: CASA for motility; flow cytometry for viability, physiology, oxidative stress, and chromatin parameters (DNA fragmentation, chromatin compaction, and thiol groups status); and spectrometry for malondialdehyde production. Semen was obtained from 12 Holstein bulls. The 24-h equilibration time showed few significant effects, with only a tiny decrease in progressive motility and a positive impact on chromatin structure. The incubation removed some of these effects, with the pattern for chromatin compaction remaining the same. No detrimental oxidative stress or increase in apoptotic or capacitation markers was detected. Additionally, the individual bull interacted with the effects of the incubation and the equilibration, especially regarding the chromatin status. Whereas this interaction did not critically affect sperm quality, it could be relevant in practice. Bull fertility as non-return rates (NRR56) was associated with some sperm parameters (especially with an improved chromatin structure) but not in the 4-h post-thawing analysis. Our study supports that extending the equilibration time by at least 24-h is feasible for bull semen freezing with the OPTIXcell extender.
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Affiliation(s)
| | | | | | | | | | | | - Juan Carlos Domínguez
- INDEGSAL, Universidad de León, León, Spain; Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, Spain
| | - J Ramiro González-Montaña
- INDEGSAL, Universidad de León, León, Spain; Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, Spain
| | - J Néstor Caamaño
- Selección y Reproducción Animal-SERIDA, Principado de Asturias, Gijón, Spain
| | - Felipe Martínez-Pastor
- INDEGSAL, Universidad de León, León, Spain; Department of Molecular Biology (Cell Biology), Universidad de León, León, Spain.
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4
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Liang J, Larbi A, Lv C, Ali S, Wu G, Quan G. Fertility results after exocervical insemination using goat semen cryopreserved with extenders based on egg yolk, skim milk, or soybean lecithin. Reprod Domest Anim 2023; 58:431-442. [PMID: 36510740 DOI: 10.1111/rda.14304] [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: 10/07/2022] [Revised: 11/10/2022] [Accepted: 12/01/2022] [Indexed: 12/15/2022]
Abstract
To evaluate the effects of four extenders on the post-thaw quality and fertility of goat semen, six Yunshang Black bucks' semen was collected, pooled, diluted with Andromed® (Andr®), Optidyl® (Opt®), P3644 Sigma l-phosphatidylcholine (l-α SL), and skim milk-based (Milk) extenders, and then cryopreserved. The sperm motilities, abnormalities, membrane and acrosome integrity, mitochondrial activity, apoptosis, and reactive oxygen species (ROS) production were evaluated after thawing. After exocervical insemination with the thawed semen, the pregnancy, lambing, and twinning rates were recorded and compared. The results showed that sperm motilities, membrane integrity, acrosome integrity, mitochondrial activity, and viable spermatozoa were significantly higher in the Andr® and Opt® groups than those in the l-α SL and Milk groups (p < .05). Furthermore, there was no difference between Andr® and Opt® (p > .05). The sperm abnormality was lower in semen frozen with the Andr® or Opt® extenders, as compared to the l-α SL or Milk extender (p < .05). Regarding, the viable cells with low ROS production, the optimal results were obtained in the semen frozen with Andr® and Opt® extenders. Following exocervical insemination, the pregnancy and lambing rates in the Milk group were significantly lower than those in the other groups (p < .05). No difference was found in the pregnancy and lambing rates between Andr®, Opt®, and l-α SL (p > .05). Furthermore, the twinning rates were similar between these four groups (p > .05). In conclusion, egg yolk or skim milk can be substituted by soybean lecithin during cryopreservation of goat semen.
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Affiliation(s)
- Jiachong Liang
- Yunnan Animal Science and Veterinary Institute, Kunming City, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Kunming City, China
| | - Allai Larbi
- Yunnan Animal Science and Veterinary Institute, Kunming City, China.,Laboratory of Sustainable Agriculture Management, Higher School of Technology-Sidi Bennour, Chouaıb Doukkali University, El Jadida, Morocco
| | - Chunrong Lv
- Yunnan Animal Science and Veterinary Institute, Kunming City, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Kunming City, China
| | - Sikandar Ali
- Dow Institute for Advanced Biological and Animal Research, Dow University of Health Sciences, Karachi, Pakistan
| | - Guoquan Wu
- Yunnan Animal Science and Veterinary Institute, Kunming City, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Kunming City, China.,Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming City, China
| | - Guobo Quan
- Yunnan Animal Science and Veterinary Institute, Kunming City, China.,Yunnan Provincial Genebank of Livestock and Poultry Genetic Resources, Kunming City, China.,Yunnan Provincial Engineering Laboratory of Animal Genetic Resource Conservation and Germplasm Enhancement, Kunming City, China
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5
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Pytlík J, Ducháček J, Codl R, Georgijevič Savvulidi F, Vrhel M, Stádník L. Effect of Different Equilibration Times and Freezing Rates on Bull Spermatozoa Cryotolerance. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2023. [DOI: 10.11118/actaun.2023.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023] Open
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6
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Freezing Protocol Optimization for Iberian Red Deer (Cervus elaphus hispanicus) Epididymal Sperm under Field Conditions. Animals (Basel) 2022; 12:ani12070869. [PMID: 35405858 PMCID: PMC8996857 DOI: 10.3390/ani12070869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/21/2022] [Accepted: 03/27/2022] [Indexed: 12/23/2022] Open
Abstract
Creating germplasm banks of wild species, such as the Iberian red Deer (Cervus elaphus hispanicus) can be challenging. One of the main difficulties is the obtention and cryopreservation of good-quality reproductive cells when the spermatozoa are obtained from epididymides after death. To avoid a loss of seminal quality during transport, developing alternative methods for cooling and freezing sperm samples under field conditions is necessary. The objective of this study was to evaluate the effects of different durations of equilibrium and different techniques of cooling and freezing on Iberian red deer epididymal sperm quality after thawing to optimize the processing conditions in this species. Three experiments were carried out: (I) evaluation of refrigeration in straws or tubes of 15 mL; (II) study of equilibration period (0, 30, 60, or 120 min); and (III) comparison of four freezing techniques (liquid nitrogen vapor in a tank (C), liquid nitrogen vapor in a polystyrene box (B), dry ice (DY), and placing straws on a solid metallic plate floating on the surface of liquid nitrogen (MP)). For all experiments, sperm motility and kinematic parameters, acrosomal integrity, sperm viability, mitochondrial membrane potential, and DNA integrity were evaluated after thawing. All statistical analyses were performed by GLM-ANOVA analysis. Samples refrigerated in straws showed higher values (p ≤ 0.05) for mitochondrial activity and lower values (p ≤ 0.05) for apoptotic cells. Moreover, the acrosome integrity showed significant differences (p ≤ 0.05) between 0 and 120 min, but not between 30 and 60 min, of equilibration. Finally, no significant differences were found between freezing in liquid nitrogen vapors in a tank or in a box, although there was a low quality after thawing when the samples were cryopreserved in dry ice or by placing straws on a solid metallic plate floating on the surface of liquid nitrogen. In conclusion, under field conditions, it would be possible to refrigerate the sperm samples by storing them in straws with a 120 min equilibration period and freezing them in liquid nitrogen vapors in a tank or box.
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7
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Vozaf J, Makarevich AV, Balazi A, Vasicek J, Svoradova A, Olexikova L, Chrenek P. Cryopreservation of ram semen: Manual versus programmable freezing and different lengths of equilibration. Anim Sci J 2021; 92:e13670. [PMID: 34951508 DOI: 10.1111/asj.13670] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/04/2021] [Accepted: 11/08/2021] [Indexed: 12/19/2022]
Abstract
The aim of our study was to examine effects of the length of semen equilibration as well as two freezing techniques on ram sperm post-thaw quality. The ejaculates of Wallachian sheep rams (n = 12) were collected by an electro-ejaculation, equilibrated in a Triladyl® (0, 2, 4, 6, and 8 h) containing glycerol and egg yolk and frozen by programmable freezing (PF) or manual freezing (MF). After thawing, sperm samples were subjected to the motility (computer-assisted sperm analysis [CASA]), viability (SYBR-14/PI), and fertilizing ability (FA) (in vitro penetration/fertilization test on bovine oocytes) assays. It was found that the equilibration of 6 h (E-6) ensured higher post-thaw sperm motility and progressive movement compared with other lengths tested, irrespective of a freezing technique. The E-6 sperm viability did not differ between PF and MF but was lower (P < 0.05) than control. Sperm FA (E-6) was similar in PF (60.44%) and MF (62%) but slightly lower than in fresh (72.8%). Our data demonstrate that the use of MF was comparable with PF, which can be applied in the field conditions without need in a piece of cost-expensive equipment, which can greatly benefit the gene bank of animal genetic resources.
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Affiliation(s)
- Jakub Vozaf
- Institute of Biotechnology, Faculty of Biotechnology and Food Science, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra, 949 76, Slovak Republic
| | - Alexander V Makarevich
- NPPC, Research Institute for Animal Production in Nitra, Hlohovecka 2, Lužianky, 951 41, Slovak Republic
| | - Andrej Balazi
- NPPC, Research Institute for Animal Production in Nitra, Hlohovecka 2, Lužianky, 951 41, Slovak Republic
| | - Jaromir Vasicek
- Institute of Biotechnology, Faculty of Biotechnology and Food Science, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra, 949 76, Slovak Republic.,NPPC, Research Institute for Animal Production in Nitra, Hlohovecka 2, Lužianky, 951 41, Slovak Republic
| | - Andrea Svoradova
- NPPC, Research Institute for Animal Production in Nitra, Hlohovecka 2, Lužianky, 951 41, Slovak Republic.,Department of Animal Morphology, Physiology and Genetics, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1/1665, Brno, 613 00, Czech Republic
| | - Lucia Olexikova
- NPPC, Research Institute for Animal Production in Nitra, Hlohovecka 2, Lužianky, 951 41, Slovak Republic
| | - Peter Chrenek
- Institute of Biotechnology, Faculty of Biotechnology and Food Science, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra, 949 76, Slovak Republic.,NPPC, Research Institute for Animal Production in Nitra, Hlohovecka 2, Lužianky, 951 41, Slovak Republic
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8
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Effect of Extender, Storage Time and Temperature on Kinetic Parameters (CASA) on Bull Semen Samples. BIOLOGY 2021; 10:biology10080806. [PMID: 34440041 PMCID: PMC8389670 DOI: 10.3390/biology10080806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/05/2021] [Accepted: 08/17/2021] [Indexed: 11/17/2022]
Abstract
Simple Summary The bull accounts for a great part of the economic value of beef herds managed with natural mating, with the Bull Breeding Soundness Evaluation (BBSE) performed in the field becoming essential. Part of the BBSE is the semen-quality evaluation (classical and kinetic parameters) that can be performed in situ (by trained practitioners) or at laboratories, with semen being short-term stored and shipped. The extender used as well as the storage temperature and duration may affect its quality. Thus, our aim was to explore the best conditions to preserve CASA kinetic parameters, to be reliably assessed afterwards. CASA parameters were preserved for up to 4–6 h post-ejaculation, except for AndroMed® in most of the parameters. Motility decreased from 4–6 h up to 24 h, with the best values obtained with BIOXcell® at 5 °C. The rest of kinetic parameters worsened when analyses were performed at 24 h. Therefore, we suggest evaluating seminal quality as soon as possible. However, using BIOXcell®, either at 5 °C or room temperature, and INRA96® at room temperature, sperm motility can be reliably evaluated for up to 6 h. These results help to fix adequate protocols for the short-term storage and shipment of bovine semen collected under field conditions. Abstract CASA kinetic parameters are often evaluated in a diagnostic centre. How storage conditions affect ejaculates up to evaluation is unclear. We assessed, in 25 commercial bulls electroejaculated in the field, the impact of time until evaluation (0–2 h, 4–6 h, and 24 h post-ejaculation), holding temperature (5 °C vs. room temperature), and extender (AndroMed®, BIOXcell® or INRA96®) on CASA kinetic parameters. Total and progressive motility, VCL, VAP, VCL, ALH, BCF, STR, LIN, and WOB were assessed. CASA kinetic parameters were preserved for up to 4–6 h post-ejaculation, except for AndroMed®. Regardless of extender or temperature, motility decreased from 4–6 h up to 24 h, with the best values obtained with BIOXcell® at 5 °C. Our results suggest that BIOXcell® can preserve sperm motility for up to 6 h, either at 5 °C or room temperature, and also INRA96® at room temperature, with motility assessments and the percentage of the most rapid sperms being the lowest with INRA96® at 5 °C. The kinetic parameters decreased when analyses were performed at 24 h. Therefore, we suggest evaluating seminal quality as soon as possible, before 6 h after collection. These results help to fix adequate protocols for the short-term storage and shipment of bovine semen collected under field conditions.
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Upadhyay VR, Ramesh V, Dewry RK, Kumar G, Raval K, Patoliya P. Implications of cryopreservation on structural and functional attributes of bovine spermatozoa: An overview. Andrologia 2021; 53:e14154. [PMID: 34143907 DOI: 10.1111/and.14154] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/12/2021] [Accepted: 06/03/2021] [Indexed: 01/31/2023] Open
Abstract
Sperm cryopreservation is an important adjunct to assisted reproduction techniques (ART) for improving the reproductive efficiency of dairy cattle and buffaloes. Improved understanding of mechanisms and challenges of bovine semen cryopreservation is vital for artificial insemination on a commercial basis. Although cryopreservation of bovine spermatozoa is widely practiced and advanced beyond that of other species, there are still major gaps in the knowledge and technology. Upon cryopreservation, disruption of spermatozoal plasma membrane configuration due to alterations in metabolic pathways, enzymes and antioxidants activity add to lower efficiency with loss of sperm longevity and fertilising ability. Therefore, the effective amalgamation of cryo-variables like ambient temperature, cooling and thawing rates, nucleation temperature, type and concentration of the cryoprotectant, seminal plasma composition, free radicals and antioxidant status are required to optimise cryopreservation. Novel strategies like supplementation of cholesterol-loaded cyclodextrins (CLC), nanovesicles, osteopontin, antioxidants, etc., in an extender and recent techniques like nano-purification and modified packaging have to be optimised to ameliorate the cryodamage. This article is intended to describe the basic facts about the sperm cryopreservation process in bovine and the associated biochemical, biophysical, ultra-structural, molecular and functional alterations.
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Affiliation(s)
| | - Vikram Ramesh
- Animal Reproduction and Gynecology, ICAR-National Research Centre on Mithun, Medziphema, India
| | - Raju Kumar Dewry
- Artificial Breeding Research Centre, ICAR-National Dairy Research Institute, Karnal, India
| | - Gaurav Kumar
- Division of Animal Physiology, ICAR-National Dairy Research Institute, Karnal, India
| | - Kathan Raval
- Artificial Breeding Research Centre, ICAR-National Dairy Research Institute, Karnal, India
| | - Priyanka Patoliya
- Division of Livestock Production Management, ICAR-National Dairy Research Institute, Karnal, India
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Zoca GB, Celeghini ECC, Pugliesi G, de Carvalho CPT, Assumpção MEOD, Siqueira AFP, Oliveira LZ, Lançoni R, de Arruda RP. Influence of seminal plasma during different stages of bovine sperm cryopreservation. Reprod Domest Anim 2021; 56:872-883. [PMID: 33724558 DOI: 10.1111/rda.13928] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/08/2021] [Indexed: 11/28/2022]
Abstract
This study aimed to evaluate the effect of seminal plasma on bovine sperm cryopreservation and to assess the integrity of plasma and acrosomal membranes, mitochondrial potential, remodelling of F-actin cytoskeleton and sperm chromatin fragmentation during the cooling, equilibrium and freezing/thawing stages. Six ejaculates collected from seven Nelore bulls (n = 42) were used in this study. Each ejaculate was divided into two aliquots (with seminal plasma = SP group; without seminal plasma = NSP group) and packed to a final concentration of 50 × 106 sperm per straw. Statistical analyses were performed using SAS software (version 9.3), and p ≤ .05 was considered significant. A time effect was observed for all sperm characteristics (p < .05), except for chromatin fragmentation (p > .05). The presence of seminal plasma better preserved the acrosomal integrity (SP = 75.2% and NSP = 71.7%; p < .05) and also provided lower F-actin remodelling during cryopreservation process (SP = 29.9% and NSP = 32.4%; p < .05). Regarding to the cryopreservation stages, it was observed that cooling step induced higher remodelling of F-actin than the equilibrium and freezing/thawing stages (56.3%, 32.2% and 23.9%, respectively; p < .05). The equilibrium step had minor influence on overall sperm characteristics while the freezing/thawing stage was responsible for the highest percentage of damage in plasma membrane (-65.2%), acrosomal membrane (-34.0%) and mitochondrial potential (-48.1%). On the other hand, none of the cryopreservation stages affected chromatin integrity. It was concluded that the presence of seminal plasma provides increased acrosomal integrity and reduced remodelling of F-actin cytoskeleton. Higher F-actin remodelling is observed after the cooling step while the freezing/thawing step is most damaging to sperm membranes and mitochondrial potential during bovine sperm cryopreservation.
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Affiliation(s)
- Gabriela Bertaiolli Zoca
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Eneiva Carla Carvalho Celeghini
- Laboratory of Teaching and Research in Pathology of Reproduction - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Guilherme Pugliesi
- Laboratory of Physiology and Molecular Endocrinology, Center of Biotechnology in Animal Reproduction - Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Carla Patricia Teodoro de Carvalho
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Mayra Elena Ortiz D'Avila Assumpção
- Laboratory of Sperm Biology, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Adriano Felipe Perez Siqueira
- Laboratory of Sperm Biology, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Leticia Zoccolaro Oliveira
- Laboratory of Animal Reproduction, Department of Veterinary Clinics and Surgery, Veterinary School, University Federal of Minas Gerais, Belo Horizonte, Brazil
| | - Renata Lançoni
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Rubens Paes de Arruda
- Laboratory of Semen Biotechnology and Andrology - Center of Biotechnology in Animal Reproduction, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
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11
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Cheema RS, Kaur S, Mavi GK, Singh AK, Honparkhe M, Gandotra VK. In vitro evaluation of Labrador dog spermatozoa cryopreserved in Tris-citric acid-fructose buffer supplemented with different combinations of extracellular and intracellular cryoprotectants. Anim Biotechnol 2019; 32:352-365. [PMID: 31814520 DOI: 10.1080/10495398.2019.1698434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Aim of this study was to compare different combinations of penetrating intracellular CPAs, i.e., glycerol (G), ethylene glycol (EG), propylene glycol (PG), dimethyl formamide (DM), and methyl acetamide (MA) and extracellular [egg yolk (EY), egg yolk plasma (EYP), low-density lipoproteins (LDL), and coconut water (CW)] in Tris-citric acid-fructose buffer (T) for Labrador dog semen cryopreservation. The study was conducted in two parts, first trial was conducted to assess optimum glycerol concentration (5-7%) in TEY and equilibration time (ET, 2-4 hrs) for Labrador dog semen cryopreservation. Secondly, compatibility of 15% TEY, 15% TEYP, 13% TLDL, and 25% TCW with G, DMF, MA, D + M, EG, and PG was evaluated for in vitro sperm function tests. Decline in sperm attributes, i.e., motility, viability, plasma membrane integrity (PMI), and acrosome integrity (AI)) was significantly (p < 0.05) less in 7% TEY-G and 4 h compared to other concentrations and ET at post-thaw. There was significantly (p < 0.05) less decline in sperm attributes in TEY-G, TEYP-G, TLDL-G, TLDL-D, TLDL-EG, and TCW-D extenders compared to other combinations at post-thaw. However, these parameters were significantly (p < 0.05) high in TEY-G and TEYP-G compared to TEYP-D, TLDL-G, TLDL-D, TLDL-EG, and TCW-D extenders at post-thaw. However, decline in motility, viability, PMI, and AI was identical in these seven extenders. This study concluded that glycerol at a concentration of 7% in TEY and 4 h ET were optimum for successful cryopreservation and besides TEY-G, other combinations of protectants may be an alternative for canine semen cryopreservation.
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Affiliation(s)
- Ranjna S Cheema
- Department of Veterinary Gynecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Sukhjeet Kaur
- Department of Veterinary Gynecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Gurjot K Mavi
- Department of Animal Nutrition, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Ashwani K Singh
- Department of Veterinary Gynecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - M Honparkhe
- Department of Veterinary Gynecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Vinod K Gandotra
- Department of Veterinary Gynecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
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Optimization of sperm freezability in Bactrian camel using various dilution rates and equilibration times. ZYGOTE 2019; 27:362-366. [PMID: 31566149 DOI: 10.1017/s0967199419000261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The effect of different dilution rates and equilibration times on the cryopreservation of Bactrian camel spermatozoa was evaluated in the current study. Semen samples from four healthy adult males were collected, processed and pooled. They were then subjected to a completely randomized 4×2 factorial design including four dilution rates (DR; 1:1, 1:2, 1:4 or 1:8; v:v with SHOTOR diluent) and two equilibration times (ET; 1 or 2 h at 5ºC). After freezing and thawing, sperm kinematic parameters as well as viability, plasma membrane integrity, abnormality and seminal malondialdehyde level were assessed. According to the results, four-fold diluted samples recorded significantly higher values (P < 0.05) for sperm total (39.58 vs 31.83 and 33.33,%) and progressive motility (19.50 vs 14.00 and 14.25,%), viability (55.37 vs 43.50 and 48.75,%) and plasma membrane integrity (46.75 vs 37.25 and 37.37,%) than those of both less (1:1) and high (1:8) concentrated samples, respectively. By contrast, the percentage of abnormal spermatozoa and the concentration of seminal malondialdehyde were comparable among all treated groups. Moreover, ET revealed that 1 h equilibration had significantly higher sperm motility (37.04 vs 33.33%), linearity (42.29 vs 32.26%), beat cross-frequency (13.15 vs 8.70 Hz), plasma membrane integrity (42.25 vs 39.75%) and viability (51.37 vs 48.12%) compared with 2 h of ET (P < 0.05). Taken together, a four-fold dilution along with 1 h equilibration can be an optimal procedure to cryopreserve Bactrian camel sperm.
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Fujii T, Hirayama H, Fukuda S, Kageyama S, Naito A, Yoshino H, Moriyasu S, Yamazaki T, Sakamoto K, Hayakawa H, Takahashi K, Takahashi Y, Sawai K. Expression and localization of aquaporins 3 and 7 in bull spermatozoa and their relevance to sperm motility after cryopreservation. J Reprod Dev 2018; 64:327-335. [PMID: 29798965 PMCID: PMC6105742 DOI: 10.1262/jrd.2017-166] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Artificial insemination with cryopreserved semen is a well-developed technique commonly used for controlled reproduction in cattle. However, despite current technical advances,
cryopreservation continues to damage bull spermatozoa, resulting in a loss of approximately 30 to 50% of viable spermatozoa post thawing. To further improve the efficiency of
cryopreservation of bull spermatozoa, understanding the molecular mechanisms underlying the cryobiological properties that affect cryoinjuries during cryopreservation process of bull
spermatozoa is required. In this study, we examined the expression and localization of aquaporin (AQP) 3 and AQP7 in fresh, cooled, and frozen-thawed bull spermatozoa. Furthermore, we
investigated the relevance of AQP3 and AQP7 to motility and to membrane integrity in frozen-thawed bull spermatozoa. Western blotting against AQP3 and AQP7 in bull spermatozoa revealed bands
with molecular weights of approximately 42 kDa and 53 kDa, respectively. In immunocytochemistry analyses, immunostaining of AQP3 was clearly observed in the principal piece of the sperm
tail. Two immunostaining patterns were observed for AQP7 ―pattern 1: diffuse staining in head and entire tail, and pattern 2: diffuse staining in head and clear staining in mid-piece.
Cooling and freeze-thawing did not affect the localization pattern of AQP7 and the relative abundances of AQP3 and AQP7 evaluated by Western blotting. Furthermore, we demonstrated that the
relative abundances of AQP3 and AQP7 varied among ejaculates, and they were positively related to sperm motility, particularly sperm velocity, post freeze-thawing. Our findings suggest that
AQP3 and AQP7 are possibly involved in the tolerance to freeze-thawing in bull spermatozoa, particularly in the sperm’s tail.
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Affiliation(s)
- Takashi Fujii
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan.,United Graduate School of Agricultural Science, Iwate University, Iwate 020-8550, Japan
| | - Hiroki Hirayama
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan.,Department of Bioproduction, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido 099-2493, Japan
| | - Shigeo Fukuda
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Soichi Kageyama
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Akira Naito
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Hitomi Yoshino
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Satoru Moriyasu
- Animal Biotechnology Group, Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | | | - Kozo Sakamoto
- Genetics Hokkaido Association, Hokkaido 089-0103, Japan
| | | | | | | | - Ken Sawai
- United Graduate School of Agricultural Science, Iwate University, Iwate 020-8550, Japan
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Effect of increasing equilibration time of diluted bull semen up to 72 h prior to freezing on sperm quality parameters and calving rate following artificial insemination. Theriogenology 2018; 108:217-222. [DOI: 10.1016/j.theriogenology.2017.11.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 11/24/2017] [Accepted: 11/26/2017] [Indexed: 11/19/2022]
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Suitability of the hemi-zona assay for the evaluation of the effect of the length of the equilibration period before cryopreservation. Theriogenology 2018; 106:157-163. [PMID: 29059603 DOI: 10.1016/j.theriogenology.2017.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/11/2017] [Accepted: 10/13/2017] [Indexed: 12/17/2022]
Abstract
The aim of this study was to test the suitability of the interspecific hemizona assay (HZA) to predict the fertilizing capacity of bovine sperm after modifying the length of the equilibration period before freezing and thawing. Ejaculates from 10 proven fertile bulls were split after dilution, equilibrated at 4 °C for either 24 h (control sperm = CS) or 6, 48, 72 or 96 h (test sperm = TS) and cryopreserved. Hemizona (HZ) pairs from in vitro matured pig oocytes were used for the heterologous HZA: After thawing and swim-up (1 h) CS and TS were co-incubated with matching HZ (125,000 S/HZ in 25 μL Fert-TALP) for 4 h. Spermatological analyses (progressive motile sperm (PMS), plasma membrane- and acrosome-intact sperm (PMAI), sperm showing a high degree of DNA fragmentation (%DFI)) were performed after 0 and 3 h of incubation after thawing. After an equilibration time of 48 h and 72 h values for PMAI0h were higher (P < 0.05) compared to PMAI0h values of sperm equilibrated for 6 h, and %DFI3h values were higher after 96 h (P < 0.05) compared to 6 h equilibration. Between 12 and 90 TS and 13-97 CS were tightly bound to each HZ, respectively. The mean Hemizona Index (HZI) after a sperm equilibration for 48 h (HZI = 92.3 ± 12.7) or 72 h (HZI = 98.9 ± 16.23) was higher (P < 0.01) than after an equilibration for 6 h (HZI = 73.3 ± 13.93) or 96 h (HZI = 81.3 ± 11.41). The HZI for 96 h equilibration was moderately negatively related to PMS0h and PMS3h (r < -0.35, P < 0.05). Furthermore the HZI for 6 h equilibration was highly negatively correlated with DFI0h (r = -0,46, P < 0.01). On the basis of these results it can be concluded that the hemi-zona assay is a suitable test to detect alterations in the fertilizing capacity of bovine sperm after modifying the equilibration period.
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Schäfer J, Waberski D, Jung M, Schulze M. Impact of holding and equilibration time on post-thaw quality of shipped boar semen. Anim Reprod Sci 2017; 187:109-115. [DOI: 10.1016/j.anireprosci.2017.10.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/20/2017] [Accepted: 10/24/2017] [Indexed: 11/24/2022]
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