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Pessoa G, Martini A, Trentin J, Minela T, Rubin M. Effect of plasma separation techniques and sperm selection on sperm recovery and viability of cooled pony stallion semen for 48h at 5°C. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-11986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Separation techniques of seminal plasma [centrifugation (SC) and Sperm Filter® (SF)] and sperm selection [Androcoll-E (SCA) and filtration glass wool (GW)] were used in 24 ejaculates from 6 stallions. In experiment 1, the ejaculates were allocated into control (no spin), centrifugation at 600 g x 10min, SF and GW. In experiment 2, semen was submitted to SC, SGA and filtered through GW. Following the treatments in both experiments, samples were kept chilled at 5°C to 50 x 106 sperm/ml for 48h. The variables measured on fresh and cooling semen were pH, motility, membrane viability function by 6-carboxyfluorescein diacetate and propidium iodide (CFDA / PI), viability or vitality (eosin / nigrosine) and mitochondrial activity. In experiment 1, centrifugation to remove seminal plasma resulted in greater damage to sperm than separation by sperm filter, and selection by glass wool was more efficient in separating viable cells and maintaining viability during cooling. In experiment 2 Androcoll-E and glass wool treatments resulted in higher (P <0.0001) motility, membrane function, mitochondrial activity, and viability than centrifuged semen. Both selection by Androcoll- E and glass wool improved the quality of semen pony stallions for preservation for up to 48h to 5ºC.
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Affiliation(s)
- G.A. Pessoa
- Universidade Federal Santa Maria, Brazil; Universidade Federal do Rio Grande do Sul, Brazil
| | | | | | | | - M.I.B. Rubin
- Universidade Federal Santa Maria, Brazil; Universidade Federal do Rio Grande do Sul, Brazil
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2
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Does Coenzyme Q10 Exert Antioxidant Effect on Frozen Equine Sperm? J Equine Vet Sci 2020; 88:102964. [PMID: 32303314 DOI: 10.1016/j.jevs.2020.102964] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/03/2020] [Accepted: 02/05/2020] [Indexed: 11/23/2022]
Abstract
During semen cryopreservation, the sensitivity of equine sperm to oxidative stress is increased by the eliminated seminal plasma. Thus, antioxidant addition to the semen extender can be helpful to the sperm survival after freezing and thawing. This work aimed to test whether coenzyme Q10 (CoQ10) added in different concentrations to the INRA 82 freezing extender has antioxidant function on equine sperm to improve its fertilizing ability. Semen samples from five stallions were frozen with the extenders: (T1) INRA 82, control, (T2) T1+ 5 μM CoQ10, (T3) T1+ 25 μM CoQ10, and (T4) T1+ 50 μM CoQ10. After sample thawing, sperm motility and kinetics characteristics were evaluated using a computer-assisted sperm analysis and sperm membrane functionality and integrity were evaluated with a hypo-osmotic swelling test and an epifluorescence microscopy, respectively. The nitrite (NO2-) and hydrogen peroxide (H2O2) concentrations of the semen samples were measured with spectrophotometry. There was no difference on the sperm characteristics among all treatments (P > .05). However, the 25 μM CoQ10 (T3) decreased NO2- concentration (6.7 ± 2.2 μM/μg protein) compared with the treatments T1, T2, and T4 (64.3 ± 3.7, 59.4 ± 5.3, 45.1 ± 8.6 μM/μg protein), respectively, as well H2O2 concentration (1.8 ± 0.3 μM/μg protein) compared with the control (4.6 ± 0.4 μM/μg protein) and 5 μM CoQ10 treatments (4.8 ± 0.2 μM/μg protein, P < .05). In conclusion, 25 μM CoQ10 plays a significant role as antioxidant to the frozen equine sperm, decreasing NO2- and H2O2 concentrations. Thus, its addition to the INRA 82 freezing extender may be beneficial to the fertilizing ability of equine semen.
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3
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A preliminary study on the use of jenny colostrum to improve quality in extenders for freezing donkey semen. Cryobiology 2019; 87:110-114. [DOI: 10.1016/j.cryobiol.2019.01.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/20/2019] [Accepted: 01/21/2019] [Indexed: 11/20/2022]
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4
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Álvarez C, Luño V, González N, Guerra P, Gil L. Effect of Mare Colostrum in Extenders for Freezing Stallion Semen. J Equine Vet Sci 2019; 77:23-27. [PMID: 31133311 DOI: 10.1016/j.jevs.2019.02.010] [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: 12/07/2018] [Revised: 01/22/2019] [Accepted: 02/13/2019] [Indexed: 10/27/2022]
Abstract
This study aimed to evaluate the addition of mare colostrum in stallion freezing extenders to improve sperm quality. First, colostrum samples were collected from four mares after the foal's birth and their composition was determined. Ejaculates were collected from nine fertile stallions. Sperm samples were pooled, diluted, and cryopreserved into three experimental extender groups: Lactose-based extender supplemented with mare colostrum (20%), lactose-based extender supplemented with egg yolk (20%), and BotuCrio. The quality of the post-thaw semen samples were evaluated assessing sperm motility by means of computer-assisted analysis, viability by SYBR-14 and propidium iodine (PI) stain, acrosome integrity by fluorescein isothiocyanate and peanut agglutinine (FITC-PNA) and PI stain, plasma membrane functionality by hypo-osmotic swelling (HOS) test, and DNA denaturation by acridine orange (AO) test. There were no significant differences in the percentages of total motility, acrosome integrity, and DNA fragmentation among the extenders after thawing. Kinematics parameters showed significantly higher values in BotuCrio than in lactose extenders (P < .05). BotuCrio and lactose colostrum extender yielded significantly better rates for HOS-test, linearity, straightness, and wobble than egg-yolk extender (P < .05). However, in relation to sperm viability, lactose egg yolk extender showed significantly better results in comparison to the others seminal experimental media (P < .05). In conclusion, the incorporation of mare colostrum into cryopreservation media protected the sperm against cold-shock; therefore, it may be a good cryoprotectant agent alternative in extenders for freezing stallion semen.
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Affiliation(s)
- Cristina Álvarez
- Chief Veterinary Officer of the Veterinary Unit, Zaragoza, Spain.
| | - Victoria Luño
- Department of Animal Pathology, Faculty of Veterinary Medicine, Instituto Agroalimentario de Aragón IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Noelia González
- Department of Animal Pathology, Faculty of Veterinary Medicine, Instituto Agroalimentario de Aragón IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Pilar Guerra
- Chief Veterinary Officer of the Veterinary Unit, Jerez de la Frontera, Cádiz, Spain
| | - Lydia Gil
- Department of Animal Pathology, Faculty of Veterinary Medicine, Instituto Agroalimentario de Aragón IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
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5
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Ferreira-Silva JC, Basto SRL, Moura MT, Rocha JM, Freitas Neto LM, Santos Filho JP, Silva Filho ML, Oliveira MAL. Freezing of Stallion Semen: In Vitro Evaluation of Motility and Acrosin Activity in Sperm Cells Cryopreserved Using Different Semen Extenders. Biopreserv Biobank 2018; 16:439-443. [PMID: 30059255 DOI: 10.1089/bio.2018.0022] [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: 11/12/2022] Open
Abstract
The work described here aimed to verify the efficiency of different extenders for cryopreservation of equine semen using sperm motility and acrosin activity as spermatic parameters. The semen was fractioned into two equal parts and resuspended in an 11% lactose solution in a 1:1 proportion, where it remained for 20 minutes at room temperature. The semen was centrifuged at 600 g for 10 minutes, and after the second centrifugation, each pellet received the freezing extender (Merck or Zorlesco) and was loaded into 4 mL straws. Each straw was placed in liquid nitrogen vapor steam for 15 minutes and further immersion in liquid nitrogen at -196°C for long-term storage. After thawing, semen samples were initially evaluated for sperm motility, both total and progressive, and acrosin activity. Moreover, semen was incubated at 37°C and further assessed at 60 and 120 minutes in a thermoresistance test (TRT) for sperm motility and acrosin activity. Immediately after thawing, both progressive and total motility, and acrosin activity were lower (p < 0.05) in thawed semen than in fresh semen. During the TRT, total sperm motility and acrosin activity after 60 minutes were lower (p < 0.05) than those obtained after thawing. Similarly, total sperm motility and acrosin activity were lower (p < 0.05) after 120 minutes than at 60 minutes of the TRT. The analysis of motility and acrosin activity allowed the conclusion that both extenders have a similar capacity to preserve the integrity of sperm cells subject to freezing and thawing.
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Affiliation(s)
| | - Sarah Romini Lima Basto
- Laboratorio de Biotécnicas Reprodutivas, Universidade Federal Rural de Pernambuco, Recife, Brazil
| | - Marcelo Tigre Moura
- Laboratorio de Biotécnicas Reprodutivas, Universidade Federal Rural de Pernambuco, Recife, Brazil
| | - Jorge Motta Rocha
- Unidade Especializada em Ciências Agrárias, Universidade Federal do Rio Grande do Norte, Natal, Brazil
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6
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Hermes R, Hildebrandt TB, Göritz F. Cryopreservation in rhinoceros-Setting a new benchmark for sperm cryosurvival. PLoS One 2018; 13:e0200154. [PMID: 29995941 PMCID: PMC6040743 DOI: 10.1371/journal.pone.0200154] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 06/20/2018] [Indexed: 11/19/2022] Open
Abstract
At times when rhinoceros are fiercely poached, when some rhinoceros species are closer than ever to extinction, and when the scientific community is in debate over the use of advanced cell technologies as a remaining resort it is time to simplify and improve existing assisted reproduction techniques to enhance breeding and genetic diversity in the living populations under our care. Semen cryopreservation has been performed in all captive rhinoceros species with limited degree of success. Here we tested three freezing extenders, containing different cryoprotectants and various freezing rates for the cryopreservation of rhinoceros sperm from 14 bulls. In experiment I, semen from 9 bulls was used to determine the most suitable diluent, cryoprotectant and freezing rate for the successful cryopreservation of rhinoceros sperm. In experiment II, semen from 5 bulls was used to assess whether the removal of seminal plasma could further improve post thaw sperm quality following cryopreservation with conditions identified in Experiment I. Semen was diluted with Berliner Cryomedia, ButoCrio® or INRA Freeze®, packaged in 0.5 mL straws and frozen 3, 4, and 5 cm over liquid nitrogen (LN) vapour or directly in a dryshipper. It was found that semen extended with ButoCrio® (containing glycerol and methylformamide) and frozen 3cm over LN vapour provided the best protection to rhinoceros spermatozoa during cryopreservation. When pooled over treatments, total and progressive post thaw motility was 75.3 ± 4.2% and 68.5 ± 5.7%, respectively marking a new benchmark for the cryopreservation of rhinoceros sperm. Post thaw total and progressive motility, viability and acrosome integrity of semen diluted in ButoCrio® was significantly higher than semen extended in Berliner Cryomedia or INRA Freeze®. The removal of seminal plasma did not improve post thaw sperm survival (p > 0.05). In conclusion, the cryosurvival of rhinoceros spermatozoa was significantly improved when using a mixture of glycerol and methylformamide in combination with a fast freezing rate at 3 cm. These results describe a new protocol for the improved cryosurvival of rhinoceros spermatozoa and will enable a more successful preservation of genetic diversity between males, especially in donors whose spermatozoa may already be compromised prior to or during collection. The successful reduction of glycerol concentration in favour of methylformamide as a cryoprotectant could be a novel suggestion for the improvement of cryopreservation techniques in other wildlife species.
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Affiliation(s)
- Robert Hermes
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
- * E-mail:
| | | | - Frank Göritz
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
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7
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Hildebrandt TB, Hermes R, Colleoni S, Diecke S, Holtze S, Renfree MB, Stejskal J, Hayashi K, Drukker M, Loi P, Göritz F, Lazzari G, Galli C. Embryos and embryonic stem cells from the white rhinoceros. Nat Commun 2018; 9:2589. [PMID: 29973581 PMCID: PMC6031672 DOI: 10.1038/s41467-018-04959-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/06/2018] [Indexed: 01/12/2023] Open
Abstract
The northern white rhinoceros (NWR, Ceratotherium simum cottoni) is the most endangered mammal in the world with only two females surviving. Here we adapt existing assisted reproduction techniques (ART) to fertilize Southern White Rhinoceros (SWR) oocytes with NWR spermatozoa. We show that rhinoceros oocytes can be repeatedly recovered from live SWR females by transrectal ovum pick-up, matured, fertilized by intracytoplasmic sperm injection and developed to the blastocyst stage in vitro. Next, we generate hybrid rhinoceros embryos in vitro using gametes of NWR and SWR. We also establish embryonic stem cell lines from the SWR blastocysts. Blastocysts are cryopreserved for later embryo transfer. Our results indicate that ART could be a viable strategy to rescue genes from the iconic, almost extinct, northern white rhinoceros and may also have broader impact if applied with similar success to other endangered large mammalian species.
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Affiliation(s)
- Thomas B Hildebrandt
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany. .,Freie Universität Berlin, D-14195, Berlin, Germany.
| | - Robert Hermes
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany
| | - Silvia Colleoni
- Avantea, Laboratory of Reproductive Technologies, 26100, Cremona, Italy
| | - Sebastian Diecke
- Max Delbrück Center, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Susanne Holtze
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany
| | - Marilyn B Renfree
- School of BioSciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Jan Stejskal
- ZOO Dvůr Králové, Štefánikova 1029, 544 01, Dvůr Králové nad Labem, Czech Republic
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-0054, Japan
| | - Micha Drukker
- Institute of Stem Cell Research and the Induced Pluripotent Stem Cell Core Facility, Helmholtz Center Munich, 85764, Neuherberg, Germany
| | - Pasqualino Loi
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - Frank Göritz
- Leibniz Institute for Zoo and Wildlife Research, D-10315, Berlin, Germany
| | - Giovanna Lazzari
- Avantea, Laboratory of Reproductive Technologies, 26100, Cremona, Italy.,Fondazione Avantea, 26100, Cremona, Italy
| | - Cesare Galli
- Avantea, Laboratory of Reproductive Technologies, 26100, Cremona, Italy. .,Fondazione Avantea, 26100, Cremona, Italy.
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8
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Larentis GR, Camozzato GC, Bastos HB, Gregory RM, Mattos RC. Equine Sperm Selection by Synthetic Membrane Filter. J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2018.01.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Martins HS, da Silva GC, Cortes SF, Paes FO, Martins Filho OA, Araujo M, Stahlberg R, Lagares MA. Lactoferrin increases sperm membrane functionality of frozen equine semen. Reprod Domest Anim 2018; 53:617-623. [PMID: 29431233 DOI: 10.1111/rda.13148] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 12/23/2017] [Indexed: 11/30/2022]
Abstract
During cryopreservation, sperm was submitted to an increase in reactive oxygen species generation. This work aimed to improve the quality of frozen equine sperm after the addition of antioxidants lactoferrin (Lf) and catalase (Cat) to a freezing extender. Semen from six stallions was frozen with the extenders: F1) control, INRA 82 freezing extender, F2) F1 + 500 μg/ml Lf and F3) F1 + 200 IU/ml Cat. After thawing, sperm motility parameters, membrane functionality and integrity, and acrosome integrity and spontaneous acrosome-reacted sperm were evaluated with a computer-assisted sperm analysis, a hypoosmotic swelling test and epifluorescent microscopy, respectively. Nitrite, hydroperoxide and iron concentrations of frozen semen were measured with spectrophotometry. The percentage of functional membrane sperm treated with Lf was higher (50.7% ± 11.6%) compared to that of the control (37.6% ± 15.6%), while the iron (61.4 ± 11.6 vs 73.3 ± 13.8 mg/dl) and nitrite concentrations (16.3 ± 7.1 vs 25.9 ± 4.2 μM/μg protein) were lower, respectively (p < .05). Thus, it can be suggested that Lf protect stallion spermatozoon during freezing as it has increased the percentage of sperm with functional membrane and decreased the lipid oxidant agents.
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Affiliation(s)
- H S Martins
- Departamento de Clinica e Cirurgia Veterinárias da Escola de Veterinária da, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - G C da Silva
- Departamento de Farmacologia do Instituto de Ciências Biológicas da UFMG, Belo Horizonte, Brazil
| | - S F Cortes
- Departamento de Farmacologia do Instituto de Ciências Biológicas da UFMG, Belo Horizonte, Brazil
| | - F O Paes
- Departamento de Clinica e Cirurgia Veterinárias da Escola de Veterinária da, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - O A Martins Filho
- Centro de Pesquisas René Rachou - Fiocruz, Laboratório de Biomarcadores de Diagnóstico e Monitoração, Belo Horizonte, Brazil
| | - Mss Araujo
- Centro de Pesquisas René Rachou - Fiocruz, Laboratório de Biomarcadores de Diagnóstico e Monitoração, Belo Horizonte, Brazil
| | - R Stahlberg
- Faculdade de Medicina Veterinária da Pontifícia, Universidade Católica- PUC Minas, Betim, Brazil
| | - M A Lagares
- Departamento de Clinica e Cirurgia Veterinárias da Escola de Veterinária da, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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10
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Pessoa GA, Martini AP, Trentin JM, Minela T, Fiorenza MF, Rubin MIB. Response to cooling of pony stallion semen selected by glass wool filtration. Andrologia 2017; 49. [DOI: 10.1111/and.12771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2016] [Indexed: 11/28/2022] Open
Affiliation(s)
- G. A. Pessoa
- Graduate Program in Veterinary Medicine: Equine; Universidade Federal do Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
- Embryolab - Laboratory of Animal Embryology; Department of Large Animals; Veterinary Hospital; Universidade Federal Santa Maria (UFSM); Santa Maria RS Brazil
| | - A. P. Martini
- Embryolab - Laboratory of Animal Embryology; Department of Large Animals; Veterinary Hospital; Universidade Federal Santa Maria (UFSM); Santa Maria RS Brazil
| | - J. M. Trentin
- Graduate Program in Veterinary Medicine: Equine; Universidade Federal do Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
- Embryolab - Laboratory of Animal Embryology; Department of Large Animals; Veterinary Hospital; Universidade Federal Santa Maria (UFSM); Santa Maria RS Brazil
| | - T. Minela
- Embryolab - Laboratory of Animal Embryology; Department of Large Animals; Veterinary Hospital; Universidade Federal Santa Maria (UFSM); Santa Maria RS Brazil
| | - M. F. Fiorenza
- Graduate Program in Veterinary Medicine: Equine; Universidade Federal do Rio Grande do Sul (UFRGS); Porto Alegre RS Brazil
- Embryolab - Laboratory of Animal Embryology; Department of Large Animals; Veterinary Hospital; Universidade Federal Santa Maria (UFSM); Santa Maria RS Brazil
| | - M. I. B. Rubin
- Embryolab - Laboratory of Animal Embryology; Department of Large Animals; Veterinary Hospital; Universidade Federal Santa Maria (UFSM); Santa Maria RS Brazil
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11
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Oldenhof H, Blässe AK, Wolkers WF, Bollwein H, Sieme H. Osmotic properties of stallion sperm subpopulations determined by simultaneous assessment of cell volume and viability. Theriogenology 2011; 76:386-91. [DOI: 10.1016/j.theriogenology.2011.02.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 02/25/2011] [Accepted: 02/27/2011] [Indexed: 11/29/2022]
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12
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Vasconcelos AB, Santana MA, Santos AMC, Santoro MM, Lagares MA. Metabolic evaluation of cooled equine spermatozoa. Andrologia 2010; 42:106-11. [DOI: 10.1111/j.1439-0272.2009.00963.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Gączarzewicz D, Piasecka M, Udała J, Błaszczyk B, Stankiewicz T, Laszczyńska M. Plasma membrane changes during the liquid storage of boar spermatozoa: a comparison of methods. Acta Vet Hung 2010; 58:105-16. [PMID: 20159744 DOI: 10.1556/avet.58.2010.1.11] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Studies were performed on boar semen routinely used at the local artificial insemination (AI) centre. The semen was stored in a Safe Cell Plus commercial extender at 17 degrees C for nine days. The aim of our research was focused on changes in sperm plasma membrane integrity. The integrity of the sperm plasma membrane and acrosome as well as sperm motility decreased after dilution and during storage of the semen. The highest percentage of live sperm was identified by the eosin-nigrosin method, a lower percentage by the SYBR-14/PI test, and the lowest percentage of live cells was discovered by the hypoosmotic swelling (HOS) test (P < 0.01). There were significant differences between the results of staining methods and sperm motility (P < 0.01). No significant differences were found between the HOS test results and sperm motility. The plasma membrane integrity parameters positively correlated (P < 0.001) with each other and with sperm motility but negatively with aspartate aminotransferase activity. Our findings confirmed that the boar sperm aging changes, which increased during liquid semen preservation, were connected with the loss of function and integrity of the sperm plasma membrane. The employed complementary tests are comprehensive indicators of sperm membrane integrity during long-term semen preservation, and they can help establish the actual number of 'healthy' cells. The assays may be used in AI laboratories and should be incorporated into the routine of semen analysis.
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Affiliation(s)
- Dariusz Gączarzewicz
- 1 West Pomeranian University of Technology Department of Animal Reproduction Biotechnology and Environmental Hygiene, Faculty of Biotechnology and Animal Breeding Doktora Judyma 6 71466 Szczecin Poland
| | - Małgorzata Piasecka
- 2 Pomeranian Medical University Laboratory of Histology and Developmental Biology Żołnierska 48 Szczecin Poland
| | - Jan Udała
- 1 West Pomeranian University of Technology Department of Animal Reproduction Biotechnology and Environmental Hygiene, Faculty of Biotechnology and Animal Breeding Doktora Judyma 6 71466 Szczecin Poland
| | - Barbara Błaszczyk
- 1 West Pomeranian University of Technology Department of Animal Reproduction Biotechnology and Environmental Hygiene, Faculty of Biotechnology and Animal Breeding Doktora Judyma 6 71466 Szczecin Poland
| | - Tomasz Stankiewicz
- 1 West Pomeranian University of Technology Department of Animal Reproduction Biotechnology and Environmental Hygiene, Faculty of Biotechnology and Animal Breeding Doktora Judyma 6 71466 Szczecin Poland
| | - Maria Laszczyńska
- 2 Pomeranian Medical University Laboratory of Histology and Developmental Biology Żołnierska 48 Szczecin Poland
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14
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Arabi M, Mohammadpour AA. Adverse effects of cadmium on bull spermatozoa. Vet Res Commun 2007; 30:943-51. [PMID: 17139546 DOI: 10.1007/s11259-006-3384-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2005] [Indexed: 11/24/2022]
Abstract
Cadmium (Cd) is a widespread environmental pollutant. Because of its long biological half-life (10-30 years in humans), Cd accumulates in the biological systems such as gonads. The present study was designed to evaluate the effect of Cd in the concentration range 50-750 micromol/L, in vitro, on the membrane integrity, motility and acrosomal status of bull spermatozoa. The samples were processed for sperm analyses using semen-diluting fluid (phosphate-buffered saline, pH 7.2). A significant elevation in the malondialdehyde level/lipid peroxidation (LPO) rate and a decrease in the spermatocrit values, particularly at a concentration of 750 micromol/L Cd, indicated the deleterious effect of Cd on sperm membrane integrity. There was also a negative correlation between LPO rate and percentage of motile spermatozoa (r = 0.992). The gelatin test indicates that Cd may alter the integrity of acrosomal membranes and shows an abnormal acrosome reaction. In this regard, a strong negative correlation was found between LPO rate and % halos (bright clear zone around sperm heads after gelatin digestion) (r = 0.990). Taking the results together, Cd proved to be a potential toxicant in the category of environmental factors that induce membrane impairment, lower motility, and decrease the rate of acrosome reactions, leading to male infertility. Apparently, the presence of Cd in the environment and seminal plasma exerts a toxic effect on sperm cells.
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Affiliation(s)
- M Arabi
- Andrology Unit, Department of Biology, Shahrekord University, POB 115, Shahrekord-88186, Iran.
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15
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Abstract
Defective sperm function is the most prevalent cause of male infertility and is difficult to treat. This study was designed to evaluate the effect of mercuric chloride (HgCl2) at 50-300 micromol/l concentration range, in vitro, on the sperm membrane and DNA integrity, viability, reduced glutathione (GSH) content and acrosomal status of the bull spermatozoa. The samples were processed for sperm analyses using semen-diluting fluid [phosphate-buffered saline (PBS), pH 7.2]. I recorded a meaningful increase in the lipid peroxidation (LPO) rate and a drastic fall in the spermatocrit values under mercury additions, dominantly at 300 microM mercury concentration, indicating a deleterious effect of mercury on the sperm membrane intactness. There was also a strong negative correlation between LPO rate and percentage of viable spermatozoa (r = -0.9, p < 0.001). GSH content was significantly impaired. Data obtained from Comet assay [single-cell gel electrophoresis (SCGE)] technique revealed that mercury is capable of inducing DNA breaks in the sperm nuclei. Interestingly, 90% of DNA breaks were double-stranded. The correlation between LPO rate and percentage of DNA breaks was found to be 0.9 (p < 0.001). Results of the gelatin test indicate that mercury is capable of altering the integrity of acrosomal membranes, showing an abnormal acrosome reaction. In this regard, a strong correlation was found between LPO rate and percentage of halos (r = -0.9, p < 0.001). In conclusion, mercury proved to be a potential oxidant in the category of 'environmental factors' to bull spermatozoa. Hence, considering the widespread use of mercury and its compounds, these metals should be regarded with more concern.
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Affiliation(s)
- M Arabi
- Andrology Laboratory, Department of Biology, Shahrekord University, Shahrekord, Iran.
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16
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Abstract
Infertility remains a major problem in society, with recent data suggesting its presence in one of four couples. The objective of the present study was to evaluate the impact of nicotine (0.25, 0.5 and 0.75 mm), as a major component of cigarette smoke, in vitro, on sperm membrane [by spermatocrit and lipoperoxidation (LPO) tests], DNA integrity (by Comet assay), and viability of spermatozoa (by eosin staining) from normozoospermic men. Sperm samples were washed and diluted with phosphate-buffered saline. A drop in spermatocrit values and an increase in thiobarbituric acid-reactive substances/LPO rate was observed with the addition of nicotine, predominantly at a concentration of 0.75 mm, indicating a deleterious effect of nicotine on sperm membrane intactness. There was also a strong negative correlation between LPO rate and percentage viable sperm cell (r = -0.990). Data obtained from Comet assay technique revealed that nicotine could induce double-stranded DNA breaks (11% in 0.75 mm concentration) in the sperm nuclei. The value of r between LPO rate and percentage Comets was found to be +0.976. Taken together, nicotine proved to be a potential oxidant agent in the category of environmental factors to the integrity of sperm plasma membrane and DNA.
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Affiliation(s)
- M Arabi
- Department of Biology, Andrology Unit, Faculty of Sciences, Shahrekord University, Shahrekord-88186, Iran.
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17
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Ball BA, Vo A. Osmotic tolerance of equine spermatozoa and the effects of soluble cryoprotectants on equine sperm motility, viability, and mitochondrial membrane potential. JOURNAL OF ANDROLOGY 2001; 22:1061-9. [PMID: 11700853 DOI: 10.1002/j.1939-4640.2001.tb03446.x] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Osmotic stress attributed to differences in the relative permeability of cryoprotectants, such as glycerol and water, appears to be an important factor in cryodamage. The objective of this study was to characterize the osmotic tolerance of equine spermatozoa, and to evaluate the effects of addition and removal of cryoprotectants from equine spermatozoa on their motility, and membrane and acrosomal integrity, as well as their mitochondrial membrane potential. Equine spermatozoa had a limited osmotic tolerance to anisosmotic conditions. Although the addition of increasing concentrations of glycerol decreased the motility and viability of equine spermatozoa, the rapid removal of glycerol by dilution in isosmotic media resulted in an even greater decline in motility and viability compared with spermatozoa maintained under anisosmotic conditions. Likewise, the addition and rapid removal of 1.0 M glycerol, ethylene glycol, dimethylsulfoxide, or propylene glycol resulted in a significant decline in sperm motility and viability. Among these cryoprotectants, ethylene glycol had the least detrimental effect on either viability or motility of spermatozoa following the rapid addition and removal of these cryoprotectants. These data demonstrate that equine spermatozoa have a limited osmotic tolerance compared with published reports for mouse or human spermatozoa, and appear to be more similar to boar spermatozoa in their osmotic tolerance. Of the 4 cryoprotectants evaluated in equine spermatozoa, the addition and removal of glycerol resulted in a more marked osmotic stress as indicated by alterations in motility, viability, and acrosomal integrity. These data suggest that alternative cryoprotectants should be considered for cryopreservation of equine spermatozoa in order to reduce osmotic stress associated with the addition of these agents during semen freezing.
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Affiliation(s)
- B A Ball
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis 95616, USA.
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