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Caamaño JN, Santiago-Moreno J, Martínez-Pastor F, Tamargo C, Salman A, Fernández Á, Merino MJ, Lacalle E, Toledano-Díaz A, Hidalgo CO. Use of the flavonoid taxifolin for sperm cryopreservation from the threatened Bermeya goat breed. Theriogenology 2023; 206:18-27. [PMID: 37172535 DOI: 10.1016/j.theriogenology.2023.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 04/24/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023]
Abstract
Taxifolin is a plant flavonoid effective as an antioxidant. This study aimed to assess the effect of adding taxifolin to the semen extender during the cooling period before freezing on the overall post-thawing sperm variables of Bermeya goats. In the first experiment, a dose-response experiment was performed with four experimental groups: Control, 10, 50, and 100 μg/ml of taxifolin using semen from 8 Bermeya males. In the second experiment, semen from 7 Bermeya bucks was collected and extended at 20 °C using a Tris-citric acid-glucose medium supplemented with different concentrations of taxifolin and glutathione (GSH): control, 5 μM taxifolin, 1 mM GSH, and both antioxidants. In both experiments, two straws per buck were thawed in a water bath (37 °C, 30 s), pooled, and incubated at 38 °C. Motility (CASA) was assessed at 0, 2, and 5 h, and sperm physiology was assessed at 0 and 5 h by flow cytometry (viability, intact acrosome membrane, mitochondria membrane potential, capacitation, intracellular reactive oxygen species -ROS-, mitochondrial superoxide, and chromatin status). In experiment 2, an artificial insemination trial (AI) was included with 29 goats for testing the taxifolin 5-μM treatment on fertility. Data were analyzed with the R statistical environment using linear mixed-effects models. In experiment 1 and compared to the control, T10 increased progressive motility (P < 0.001) but taxifolin decreased total and progressive motility at higher concentrations (P < 0.001), both post-thawing and after the incubation. Viability decreased post-thawing in the three concentrations (P < 0.001). Cytoplasmic ROS decreased at 0 and 5 h at T10 (P = 0.049), and all doses decreased mitochondrial superoxide post-thawing (P = 0.024). In experiment 2, 5 μM taxifolin or 1 mM GSH (alone or combined) increased total and progressive motility vs. the control (P < 0.01), and taxifolin increased kinematic parameters such as VCL, ALH, and DNC (P < 0.05). Viability was not affected by taxifolin in this experiment. Both antioxidants did not significantly affect other sperm physiology parameters. The incubation significantly affected all the parameters (P < 0.004), overall decreasing sperm quality. Fertility after artificial insemination with doses supplemented with 5 μM taxifolin was 76.9% (10/13), not significantly different from the control group (69.2%, 9/13). In conclusion, taxifolin showed a lack of toxicity in the low micromolar range and could benefit goat semen cryopreservation.
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Affiliation(s)
- J N Caamaño
- Department of Animal Selection and Reproduction, Regional Service for Agrifood Research and Development (SERIDA), Gijón, Asturias, Spain.
| | | | - F Martínez-Pastor
- INDEGSAL, Universidad de León, León, Spain; Molecular Biology (Cell Biology), Universidad de León, León, Spain
| | - C Tamargo
- Department of Animal Selection and Reproduction, Regional Service for Agrifood Research and Development (SERIDA), Gijón, Asturias, Spain
| | - A Salman
- INDEGSAL, Universidad de León, León, Spain
| | - Á Fernández
- Department of Animal Selection and Reproduction, Regional Service for Agrifood Research and Development (SERIDA), Gijón, Asturias, Spain
| | - M J Merino
- Department of Animal Selection and Reproduction, Regional Service for Agrifood Research and Development (SERIDA), Gijón, Asturias, Spain
| | - E Lacalle
- INDEGSAL, Universidad de León, León, Spain
| | | | - C O Hidalgo
- Department of Animal Selection and Reproduction, Regional Service for Agrifood Research and Development (SERIDA), Gijón, Asturias, Spain
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Dziekońska A, Niedźwiecka E, Niklewska ME, Koziorowska-Gilun M, Kordan W. Viability longevity and quality of epididymal sperm stored in the liquid state of European red deer (Cervus elaphus elaphus). Anim Reprod Sci 2019; 213:106269. [PMID: 31987322 DOI: 10.1016/j.anireprosci.2019.106269] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 12/11/2019] [Accepted: 12/27/2019] [Indexed: 11/25/2022]
Abstract
The aim of the study was to evaluate viability longevity and quality of liquid-stored epididymal sperm of European red deer (Cervus elaphus elaphus). Sperm samples were recovered from epididymides of 15 mature stags. Samples were diluted to 100 × 106 sperm⁄mL in modified Salomon's extender and stored at 5 °C for 25 days. Sperm were analyzed to determine total motility (TMOT), progressive motility (PMOT) and motion variables [CASA system], acrosomes with normal apical ridges (NAR), viability and acrosomal status (FITC-PNA/PI), plasma membrane integrity (PMI) and mitochondrial membrane potential (MMP) on the first day (D1) and every other day of storage (D3-D25). Data were analyzed using a one-way analysis of variance (ANOVA). Spermatozoa remained motile until D25, whereas TMOT exceeded 60%, NAR and PMI exceeded 80%, FITC-PNA/PI exceeded 75%, and MMP approximated 70% until D11. There was a lesser (P < 0.05) value for these variables on D5 (relative to D1). Furthermore, there was a decrease in values for motility variables as duration of storage increased, excluding amplitude of lateral head displacement, on D3. The results indicate that liquid-stored epididymal sperm of European red deer are characterized as having a long viability (25 days) with a retention of sperm quality for as long as 11 days in the liquid storage state. In vitro or in vivo studies, however, are required to confirm the findings in the present study.
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Affiliation(s)
- Anna Dziekońska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-718 Olsztyn, Poland.
| | - Elżbieta Niedźwiecka
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-718 Olsztyn, Poland
| | - Magdalena Ewa Niklewska
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-718 Olsztyn, Poland
| | - Magdalena Koziorowska-Gilun
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-718 Olsztyn, Poland
| | - Władysław Kordan
- Department of Animal Biochemistry and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 5, 10-718 Olsztyn, Poland
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Martínez-Pastor F, Álvarez M, Guerra C, Chamorro CA, Anel-López L, de Paz P, Anel L, Álvarez-Rodríguez M. Extender osmolality, glycerol and egg yolk on the cryopreservation of epididymal spermatozoa for gamete banking of the Cantabric Chamois (Rupicapra pyrenaica parva). Theriogenology 2019; 125:109-114. [DOI: 10.1016/j.theriogenology.2018.10.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 10/08/2018] [Accepted: 10/26/2018] [Indexed: 11/28/2022]
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Álvarez-Rodriguez M, Álvarez M, Anel-López L, Guerra C, Chamorro CA, Anel L, de Paz P, Martínez-Pastor F. Effect of length of time post-mortem on quality and freezing capacity of Cantabric chamois (Rupicapra pyrenaica parva) epididymal spermatozoa. Anim Reprod Sci 2018; 198:184-192. [PMID: 30301620 DOI: 10.1016/j.anireprosci.2018.09.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/17/2018] [Accepted: 09/27/2018] [Indexed: 12/17/2022]
Abstract
Genome Resource Banks are keystones in the ex-situ conservation of wild species. Post-mortem (PM) collection of epididymal spermatozoa is an opportunistic and valuable source of germplasm, the time from the death of the animal limits its use. Seeking to improve germplasm preservation strategies for the chamois (Rupicapra sp.), the effect of PM time on epididymal sperm quality and freezability was studied using the Cantabrian chamois. Samples were classified according to PM collection time, up to 216 h (refrigerated), and cryopreserved (Tris-citric acid-fructose, 430 mOsm/kg, 15% egg yolk, 8% glycerol; freezing at -20 °C/min). Sperm quality was assessed after recovery and post-thawing (motility by CASA, HOS test, abnormal forms, cytoplasmic droplets, and viability and acrosomal damage by flow cytometry). The sperm mass pH and osmolality showed a positive correlation with time. Total sperm motility dropped after 2 days PM, with progressivity and sperm velocities remained similar up to 3 days PM. Sperm freezability was acceptable, with the post-thawing HOST, motility, progressivity, VAP, VCL, VSL and BCF negatively correlating with PM time. Overall, chamois epidydimal samples were not adequate for preservation after 6 days PM. Freezability capacity could make these spermatozoa suitable for specific ART even if kept refrigerated for several days PM.
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Affiliation(s)
- M Álvarez-Rodriguez
- Department of Clinical and Experimental Medicine (IKE), BKH, Obstetrics and Gynecology, Linköping University, Linköping, Sweden; Department of Animal Health and Anatomy, Veterinary Faculty, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Álvarez
- Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, León, Spain; INDEGSAL, Universidad de León, 24071 León, Spain
| | - L Anel-López
- Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, León, Spain; INDEGSAL, Universidad de León, 24071 León, Spain
| | - C Guerra
- Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, León, Spain
| | - C A Chamorro
- Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, León, Spain; INDEGSAL, Universidad de León, 24071 León, Spain
| | - L Anel
- Department of Medicine, Surgery and Veterinary Anatomy, Universidad de León, León, Spain; INDEGSAL, Universidad de León, 24071 León, Spain
| | - P de Paz
- INDEGSAL, Universidad de León, 24071 León, Spain; Department of Molecular Biology (Cell Biology), Universidad de León, Spain
| | - F Martínez-Pastor
- INDEGSAL, Universidad de León, 24071 León, Spain; Department of Molecular Biology (Cell Biology), Universidad de León, Spain.
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Dialysis of the goat semen and its effect on the quality of frozen/thawed spermatozoa processed in the presence of egg yolk. Anim Reprod Sci 2018; 198:65-73. [PMID: 30217678 DOI: 10.1016/j.anireprosci.2018.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 08/24/2018] [Accepted: 09/04/2018] [Indexed: 11/21/2022]
Abstract
The aim of the present study was to analyze the effect of dialysis on the quality of frozen/thawed buck semen. Ejaculates (n = 15) from three Saanen bucks were divided into three experimental groups. Semen in Group Ce (centrifugation) was processed by standard method and washed two times at 1.085 × g for 20 min. During this time, the diluted control semen (Co) was stored at room temperature. Semen in Group D was dialyzed using 300 kDa cut-off semi-permeable cellulose tubing. The semen from all groups was diluted with extender containing 20% egg yolk and frozen in liquid nitrogen vapor. After thawing, semen samples were evaluated by microscopic and biochemical analyses. Phospholipase A2 was in amounts that was 72.0 ± 11.7% less after dialysis and 21.3 ± 10.0% less after washing with centrifugation compared to the control semen (P < 0.05). Spermatozoa from Group Co had a lesser motility and viability and greater percentage of morphological abnormal spermatozoa in comparison to Groups D and Ce at 3 h after thawing and incubation on 37 °C. At the same time motility and percentage of HOST positive spermatozoa were greater in Group Ce compared with D (P < 0.05). There, however, was no difference in morphology and viability (CFDA/PI analysis) of spermatozoa between Ce and D group. Results from the present study suggest the dialysis is the promising alternative method for reducing phospholipase A2 in the buck semen before cryopreservation.
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Bóveda P, Esteso M, Castaño C, Toledano-Díaz A, López-Sebastián A, Muñiz A, Prieto P, Mejía O, Ungerfeld R, Santiago-Moreno J. Slow and ultra-rapid freezing protocols for cryopreserving mouflon ( Ovis musimon ) and fallow deer ( Dama dama ) epididymal sperm. Anim Reprod Sci 2018; 192:193-199. [DOI: 10.1016/j.anireprosci.2018.03.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/28/2018] [Accepted: 03/07/2018] [Indexed: 12/19/2022]
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Esteso MC, Toledano-Díaz A, Castaño C, Pradiee J, Lopez-Sebastián A, Santiago-Moreno J. Effect of two cooling protocols on the post-thaw characteristics of Iberian ibex sperms. Cryobiology 2018; 80:12-17. [DOI: 10.1016/j.cryobiol.2018.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/11/2018] [Accepted: 01/11/2018] [Indexed: 11/26/2022]
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Effect of different semen extenders for the storage of chilled sperm in Tigrina ( Leopardus tigrinus ). Theriogenology 2017; 89:146-154. [DOI: 10.1016/j.theriogenology.2016.10.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 08/26/2016] [Accepted: 10/10/2016] [Indexed: 11/18/2022]
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Pradiee J, Esteso M, Castaño C, Toledano-Díaz A, López-Sebastián A, Santiago-Moreno J. Cryopreservation of epididymal sperm from ibexes (Capra pyrenaica) using short equilibration time with glycerol. Theriogenology 2014; 82:525-8. [DOI: 10.1016/j.theriogenology.2014.05.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 05/12/2014] [Accepted: 05/12/2014] [Indexed: 11/27/2022]
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CHARACTERIZATION AND CRYOPRESERVATION OF SEMEN FROM ENDANGERED MARKHOR GOATS (CAPRA FALCONERI HEPTNERI) WITH EVALUATION OF REPRODUCTIVE SEASONALITY. J Zoo Wildl Med 2013; 44:672-85. [DOI: 10.1638/2012-0267r.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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[Effects of some extenders and monoamines on sperm cryopreservation in tree shrews (Tupaia belangeri)]. DONG WU XUE YAN JIU = ZOOLOGICAL RESEARCH 2012; 33:19-28. [PMID: 22345004 DOI: 10.3724/sp.j.1141.2012.01019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The tree shrew may be an important experimental animal for disease models in humans. The effects of some extenders and momamines on sperm cryopreservation will provide helpful data for experimentation of strains and conservation of genetic resources in tree shrews. Epididymal sperm were surgically harvested from male tree shrews captured around Kunming, China and sperm motility, acrosome integrity and fertility were assessed during cryopreservation. In Experiment 1 eight extenders (TTE, TCG, TCF, TTG, BWW, BTS, DM, and SR) supplemented with 0.4 mol/L DMSO were used to dilute the sperm: only TTE, DM and SR showed no differences in motility and acrosome integrity compared to fresh controls after equilibration. After freezing and thawing, sperm in any extender showed lower motility than fresh control and sperm in DM showed higher motility than other groups. However, BWW produced the lowest motility. For acrosome integrity, TTE and DM showed higher than BWW, BTS and SR after equilibration. The parameter in DM was higher than other groups (except TTE) after thawing. In Experiment 2 four penetrating cryoprotectant agents (CPA) [dimethyl-formamide (DF), formamide (F), dimethylacetamide (DA), and acetamide (A)] at 0.2 mol/L, 0.4 mol/L, 0.8 mol/L, and 1.2 mol/L, respectively were added to the DM extender. Motility showed no difference among CPA groups and non-CPA group (control) after equilibration, but all thawed sperm showed lower values in motility and acrosome integrity than pre-freezing groups. However, sperm in 0.8 mol/L DF and 0.4 mol/L DMSO showed higher values in both parameters than that in other CPA groups (P>0.05). In Experiment 3 the fertilization rate of oocytes inseminated with 0.4mol/L DMSO (50%) were higher than that with 0.8mol/L DF (16%). In conclusion, non-ion extenders supplemented with egg yolk may be better for sperm cryopreservation in tree shrews and cryoprotectant effects of monoamines agents should be further studied in this species.
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Silva M, Peixoto G, Santos E, Castelo T, Oliveira M, Silva A. Recovery and cryopreservation of epididymal sperm from agouti (Dasiprocta aguti) using powdered coconut water (ACP-109c) and Tris extenders. Theriogenology 2011; 76:1084-9. [DOI: 10.1016/j.theriogenology.2011.05.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 05/03/2011] [Accepted: 05/03/2011] [Indexed: 11/26/2022]
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Webb GW, Burris CL, Harmon SE, Baker RH. Effects of Egg Yolk Source on the Cryopreservation of Stallion Spermatozoa. J Equine Vet Sci 2011. [DOI: 10.1016/j.jevs.2011.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Coloma MA, Toledano-Díaz A, López-Sebastián A, Santiago-Moreno J. The influence of washing Spanish ibex (Capra pyrenaica) sperm on the effects of cryopreservation in dependency of the photoperiod. Theriogenology 2010; 73:900-8. [PMID: 20092881 DOI: 10.1016/j.theriogenology.2009.11.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 11/24/2009] [Accepted: 11/29/2009] [Indexed: 11/29/2022]
Abstract
Extenders containing low concentrations of egg yolk are recommended for cryopreserving ibex spermatozoa. However, the phylogenetic relationship of the Spanish ibex (Capra pyrenaica) with domestic goats suggests that phospholipases in the seminal plasma may have a negative effect on the response to freezing-thawing when egg yolk-based diluents are employed. The aim of the current work was to determine how seminal plasma removal from Spanish ibex semen, collected by electroejaculation over a period of 1 yr, affects its response to freezing-thawing. Semen was collected from six adult ibexes maintained in captivity. The negative effects of freezing-thawing on the quality of sperm motility and on the integrity of the acrosome and plasma membrane were more serious in the nonwashed semen samples than in those from which the seminal plasma had been removed (P<0.01, P<0.05, and P<0.05 respectively). The beneficial effect of removing the seminal plasma was particularly noticeable during the time of decreasing photoperiod. This suggests that ibex semen shows increased phospholipase activity during the rutting season.
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Affiliation(s)
- M A Coloma
- Departamento de Reproducción Animal, INIA, Madrid, Spain
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Cryopreservation of Spanish ibex (Capra pyrenaica) sperm obtained by electroejaculation outside the rutting season. Theriogenology 2009; 71:1253-60. [DOI: 10.1016/j.theriogenology.2008.12.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 12/17/2008] [Accepted: 12/29/2008] [Indexed: 11/24/2022]
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Santiago-Moreno J, Coloma MA, Toledano-Díaz A, Gómez-Brunet A, Pulido-Pastor A, Zamora-Soria A, Carrizosa JA, Urrutia B, López-Sebastián A. A comparison of the protective action of chicken and quail egg yolk in the cryopreservation of Spanish ibex epididymal spermatozoa. Cryobiology 2008; 57:25-9. [DOI: 10.1016/j.cryobiol.2008.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 04/29/2008] [Accepted: 05/13/2008] [Indexed: 10/22/2022]
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Santiago-Moreno J, Toledano-Díaz A, Dorado J, Pulido-Pastor A, Coloma MA, López-Sebastián A. Recovery and cryopreservation of Spanish ibex epididymal spermatozoa. ACTA ACUST UNITED AC 2008; 53:309-16. [PMID: 18357960 DOI: 10.1080/01485010701730674] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A Tris-citric acid-glucose (TCG) diluent containing low concentrations (6%) of egg yolk, and a TCG extender containing lactose (without egg yolk), were compared for use in the cryopreservation of Spanish ibex (Capra pyrenaica) epididymal spermatozoa. To optimize the collection of epididymal spermatozoa, two spermatozoa recovery methods were tested: i) by using small cuts in the cauda epididymides and ii) by the application of air pressure (from a syringe) inside the vas deferens. The percentage of viable spermatozoa recovered was lower (P < 0.05) with the air pressure method. No significant differences were seen in the efficacy of the two diluents as determined by percentage viability of thawed sperm, membrane integrity (as determined by the hypo-osmotic swelling test), or acrosome integrity. The use of the TCG-lactose medium strongly reduced sperm motility (P < 0.001). The sperm samples that had been diluted with TCG-6% egg yolk extender showed a greater incidence (P < 0.05) of morphological abnormalities. TCG-lactose alone, does not well preserve motility when cryopreserving Spanish ibex epididymal spermatozoa.
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Affiliation(s)
- Julián Santiago-Moreno
- Departamento de Reproducción Animal, SGIT-INIA, Avda. Puerta de Hierro km 5.9, 28040 Madrid, Spain.
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Dorado J, Rodríguez I, Hidalgo M. Cryopreservation of goat spermatozoa: Comparison of two freezing extenders based on post-thaw sperm quality and fertility rates after artificial insemination. Theriogenology 2007; 68:168-77. [PMID: 17532460 DOI: 10.1016/j.theriogenology.2007.04.048] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2006] [Revised: 04/02/2007] [Accepted: 04/14/2007] [Indexed: 11/22/2022]
Abstract
TRIS-glucose or skim milk extenders are most commonly used for cryopreserving goat sperm. The aim of this study was to compare the ability of two extenders based on TRIS and skimmed milk buffer to maintain sperm viability after cryopreservation. Goat semen samples (n=110) were frozen with TRIS and with milk extender and thaw. Sperm motion parameters, morphology and acrosomal integrity were assessed in fresh and frozen-thawed samples by Sperm Class Analyzer (SCA) and Diff-Quik and Spermac staining techniques. Pregnancy rates were obtained after cervical insemination with frozen semen doses. The cryopreservation process had a significant effect on acrosome and kinematic parameters. TRIS extender provided more effective preservation of total motility, velocity parameters and amplitude of lateral head displacement after freezing. The percentage of acrosome intact spermatozoa was significantly higher in samples diluted with milk extender. In the insemination doses, mean values of velocity parameters and lateral head displacement were higher in doses processed in TRIS. Spermatozoa frozen in milk extender was mathematically greater than for those frozen with TRIS extenders, though no significant difference exists. We conclude that post-thaw kinematic parameters and acrosome integrity assessed after 1h of incubation was acceptable in both extenders which indicated the feasibility of cryopreserving goat spermatozoa. TRIS extender results in better in vitro performance compared to milk, though these improvements were not reflected in fertility results. Semen doses cryopreserved in milk extender provided greater pregnancy rates after intra-cervical insemination compared to those in TRIS extender (52.4% versus 42.9%).
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Affiliation(s)
- J Dorado
- Animal Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, Campus de Rabanales (Edif. Francisco Santisteban), Ctra. Madrid-Cádiz, km 396, 14014 Cordoba, Spain.
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