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Martins MIM, Silva VW, Hidalgo MMT, Fontbonne A. Insights into alternative cryoprotectants to freeze sperm of domestic cats. Reprod Domest Anim 2024; 59:e14524. [PMID: 38268208 DOI: 10.1111/rda.14524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 12/03/2023] [Accepted: 12/24/2023] [Indexed: 01/26/2024]
Abstract
Globalization and habitat destruction pose a significant threat to wildlife felids. Even though conservation banks for genetic materials have been created, the sperm cryopreservation with minimal cell damage is still a great challenge. Thus, this study aimed to compare the effects of two commercial extenders with different concentrations of alternative cryoprotectants on thawed sperm quality of domestic cats. Five adult cats were anaesthetized (using a combination of 40 μg/kg medetomidine associated to 5 mg/kg ketamine), and the semen was collected by electroejaculation (electrical stimulation of 2-3 V). Semen samples were evaluated for sperm characteristics (kinetics, morphology, membrane integrity and morphometry). Subsequently, they were sorted into two aliquots and centrifuged. The aliquots were added to a commercial extender containing 3% glycerol and 2% methylformamide (extender I) or 2% glycerol and 3% methylformamide (extender II), frozen, thawed (37°C/30 s) and reevaluated. Comparatively, the sperm kinetics and membrane integrity of fresh semen were higher (p < .002) than frozen samples in extender I and II. Total and progressive motility were lowest in the thawed samples. However, the subjective analysis indicated high sperm motility, since the kinetics evaluation was impaired by the low cell number in the thawed samples. There were no differences in sperm morphology between the groups. In the sperm morphometric analysis, a significant difference (p = .04) was identified in the length of the intermediate piece in extender II samples compared with fresh and extender I. Thus, it can be concluded that although the concentrations tested did not maintain the kinetic parameters and membrane integrity of spermatozoa after thawing, the extender with a lower concentration of glycerol was less toxic for maintaining the midpiece length.
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Flores Huarco NH, Giuliano SM, Fumuso FG, Miragaya MH, Cucho Dolmos HC, Carretero MI. Use of dimethylformamide to cryopreserve alpaca semen previously incubated with collagenase. Reprod Domest Anim 2021; 56:1387-1397. [PMID: 34379864 DOI: 10.1111/rda.14003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 08/07/2021] [Indexed: 11/29/2022]
Abstract
The objective of this study was to evaluate the effect of collagenase and two final dimethylformamide (DMF) concentrations (4% and 7%) on alpaca frozen-thawed sperm quality. A total of 25 ejaculates from 5 alpaca were obtained using electroejaculation. Each individual ejaculate was evaluated and then diluted 4:1 in a solution of 1 mg/ml collagenase in HEPES-TALP medium and incubated for 4 min at 37°C. Subsequently, samples were diluted in TRIS-fructose-citric acid-egg yolk and cooled to 5°C. Then, each sample was divided in two aliquots and DMF at final concentration of 4% or 7% was added, equilibrated for 1 hr at 5°C and frozen over liquid nitrogen vapours. A Kruskal-Wallis test was used to evaluate the sperm morphometry, and Completely Random Block designs were used to analyse sperm motility, viability, membrane function and acrosome status. After collagenase incubation, none of the samples showed thread formation, and sperm parameters were preserved. Non-progressive motile sperm were higher (p < .05) in equilibrated samples (4% DMF: 31.8 ± 8.3% and 7% DMF: 36.3 ± 11.8%) compared to raw (10.1 ± 4.3%) and frozen-thawed semen (4% DMF: 9.7 ± 1.8% and 7% DMF: 7.5 ± 3.2%). Sperm membrane function, membrane integrity and intact acrosomes were higher (p < .05) in raw semen (40.1 ± 12.2%, 94.6 ± 3.2% and 91.3 ± 8.1%) compared to frozen-thawed samples (4% DMF: 19.8 ± 4.7%, 53.2 ± 2.7%, 65.7 ± 8.7% and 7% DMF: 20.4 ± 4.5%, 54.1 ± 1.4%, 64.6 ± 9.1%). Length of the sperm head was lower in frozen-thawed samples, being statistically different with 4% DMF compared to pre-freezing samples. The ratio between acrosome and head areas was greater (p < .05) in frozen-thawed samples. Incubation of raw alpaca semen with collagenase decreased the thread formation without affecting sperm quality. Frozen of collagenase treated alpaca semen with 4% or 7% DMF did not preserve the sperm parameters in thawed samples.
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Affiliation(s)
- Nils H Flores Huarco
- Facultad de Ciencias Agrarias, Universidad Nacional de San Antonio Abad del Cusco, Cusco, Perú.,Escuela de Postgrado, Universidad Nacional del Altiplano de Puno, Puno, Perú
| | - Susana M Giuliano
- Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fernanda G Fumuso
- Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Universidad de Buenos Aires, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Marcelo H Miragaya
- Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Hernán C Cucho Dolmos
- Facultad de Ciencias Agrarias, Universidad Nacional de San Antonio Abad del Cusco, Cusco, Perú
| | - María I Carretero
- Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Universidad de Buenos Aires, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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Characterization of Bottlenose Dolphin (Tursiops truncatus) Sperm Based on Morphometric Traits. BIOLOGY 2021; 10:biology10050355. [PMID: 33922110 PMCID: PMC8143526 DOI: 10.3390/biology10050355] [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: 03/18/2021] [Revised: 04/08/2021] [Accepted: 04/19/2021] [Indexed: 11/19/2022]
Abstract
Simple Summary Dolphins are one of the best adapted aquatic mammalians in captivity. While these animals can reproduce naturally in aquaria, many aspects related to their reproduction are still unknown. Their behavior, sociability with humans and ability to learn make dolphins ideal subjects for investigating their reproduction features for conservation programs aimed at this aquatic species and others. It is known that dolphins use a multi-male mating strategy, in which sperm competition could play a fundamental role. This study aims to characterize the shape and dimensions of dolphin sperm from two mature males and putatively classifies them into subpopulations. Moreover, the influence of sex hormone levels (testosterone) and refrigeration (temperature and storage period) with sperm dimension was evaluated. The results indicated that sperm dimensions and shape differed between the two males studied and that the sperm of both males could be classified into two subpopulations depending on their dimensions. Moreover, both testosterone levels and refrigeration were seen to influence sperm dimensions. This investigation provides new insights into sperm competition in dolphin species, and the results could be extrapolated to other endangered aquatic mammalian species. Abstract Bottlenose dolphin (Tursiops truncatus) males follow many reproductive strategies to ensure their paternity. However, little is known about the sperm traits, including morphometric features, that contribute to their reproductive success. Our aim was to study dolphin sperm morphometry (a total of 13 parameters) in two adult males to evaluate (i) presumptive sperm subpopulations, (ii) the correlation of sperm morphometry with testosterone levels and (iii) the effect of refrigerated storage on the sperm morphometry. Sperm populations were classified into four principal components (PCs) based on morphometry (>94% of cumulative variance). The PCs clustered into two different sperm subpopulations, which differed between males. Furthermore, the levels of serum testosterone were positively correlated with the length of the midpiece but negatively correlated with head width and the principal piece, flagellum and total sperm lengths. Most of the sperm morphometric parameters changed during the storage period (day 1 vs. day 7), but only the principal piece length was affected by the storage temperature (5 °C vs. 15 °C). This is the first study to identify dolphin sperm subpopulations based on morphometry and the influence of serum testosterone and refrigeration on sperm morphometry.
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Santiago-Moreno J, Castaño C, Bóveda P, Mejía O, Velázquez R, Martínez-Fresneda L, Flores-Gil VN, Marcos-Beltrán JL, González-Guirado AM, Esteso MC, Toledano-Díaz A, López-Sebastián A. Slow and ultra-rapid freezing protocols for cryopreserving roe deer (Capreolus capreolus) epididymal sperm collected at different times of year. EUR J WILDLIFE RES 2021. [DOI: 10.1007/s10344-021-01468-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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O'Brien E, Esteso M, Castaño C, Toledano-Díaz A, Bóveda P, Martínez-Fresneda L, López-Sebastián A, Martínez-Nevado E, Guerra R, López Fernández M, Vega R, Guillamón F, Santiago-Moreno J. Effectiveness of ultra-rapid cryopreservation of sperm from endangered species, examined by morphometric means. Theriogenology 2019; 129:160-167. [DOI: 10.1016/j.theriogenology.2019.02.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 01/21/2019] [Accepted: 02/24/2019] [Indexed: 12/29/2022]
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6
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Martínez-Rodríguez C, Anel-López L, Alvarez M, Ortega-Ferrusola C, Boixo JC, Peña FJ, Anel L, de Paz P. Progesterone stimulates the long-distance migration of capacitated ram spermatozoa through viscous media under geotactic condition. Theriogenology 2018; 118:7-15. [PMID: 29859396 DOI: 10.1016/j.theriogenology.2018.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 05/11/2018] [Accepted: 05/12/2018] [Indexed: 11/18/2022]
Abstract
Forward progressive motility of spermatozoa is an essential prerequisite for reproductive success, and sperm navigation is assisted by guidance mechanisms that may depend on micro-environmental factors. In the present study, we performed an integrated analysis of long-distance ram sperm migration in vitro that combined two environmental factors (10 μM progesterone and a geotactic effect) and the physiological status of the cells (capacitation treatment). A penetration assay was used in which spermatozoa had to travel 20 mm in a viscous medium (two media of differing viscosity: acrylamide and hyaluronic acid) through a tube device. The number of migrating spermatozoa, the physiology of the cells (motility analyzed using a CASA system; acrosomal status, viability and active mitochondria evaluated by flow cytometry; DNA fragmentation index calculated by quantitative PCR) and the morphometry of sperm heads (performed using an image analysis system) were evaluated after long-distance sperm migration. Ram sperm capacitation significantly stimulates cell migration through viscous media under geotactic conditions, and this effect is enhanced by progesterone induction. The rheological characteristics of viscous media have a marked impact on ram sperm migration, and acrylamide more favorably facilitates navigation over a large distance. The migrating spermatozoa are morphologically better adapted (high ellipticity) for displacement in viscous media and exhibit remarkably depleted mitochondrial membrane potential.
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Affiliation(s)
- Carmen Martínez-Rodríguez
- Animal Reproduction and Obstetrics, University of León, Spain; Molecular Biology (Cell Biology), University of León, Spain
| | - Luis Anel-López
- Animal Reproduction and Obstetrics, University of León, Spain; ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain
| | - Mercedes Alvarez
- Animal Reproduction and Obstetrics, University of León, Spain; ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain
| | - Cristina Ortega-Ferrusola
- Animal Reproduction and Obstetrics, University of León, Spain; ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain
| | - Juan Carlos Boixo
- Animal Reproduction and Obstetrics, University of León, Spain; ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain
| | - Fernando J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Luis Anel
- Animal Reproduction and Obstetrics, University of León, Spain; ITRA-ULE, INDEGSAL, University of León, 24071, León, Spain
| | - Paulino de Paz
- Animal Reproduction and Obstetrics, University of León, Spain; Molecular Biology (Cell Biology), University of León, Spain.
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7
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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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8
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Kondracki S, Wysokińska A, Kania M, Górski K. Application of Two Staining Methods for Sperm Morphometric Evaluation in Domestic Pigs. J Vet Res 2017; 61:345-349. [PMID: 29978093 PMCID: PMC5894426 DOI: 10.1515/jvetres-2017-0045] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 08/23/2017] [Indexed: 11/28/2022] Open
Abstract
Introduction The effect of two smear staining methods on the dimensions and shape of sperm cells in the semen of domestic pigs was evaluated. Material and Methods The studies were carried out on 30 ejaculates collected from 15 boars, which included five Duroc boars, five Pietrain boars, and five hybrid Duroc × Pietrain boars. Each ejaculate was next sampled to make two microscopic slides, of which one was stained with eosin-nigrosin and the other with eosin-gentian dye. In total, 600 measurements of sperm cells were made. Each sperm was measured for the following morphometric parameters: head length, head width, head area, head perimeter, tail length, and the total sperm length. Results Sperms measured on slides stained with eosin-nigrosin showed lower dimensions as compared with those stained with the eosin-gentian dye method. Sperm stained with eosin-nigrosin had shorter and narrower heads than sperm stained with eosin-gentian dye. The method of staining, therefore, affected not only the dimensions of the sperm, but also the proportions of the dimensions defining the shape of the sperm. Conclusions The size and shape parameters in porcine sperm may take on different values depending on the method of semen staining. Sperm cells stained with eosin-nigrosin are smaller than the sperm stained with eosin-gentian dye. The sensitivity of the sperm to the type of dye used for the fixation may be associated with genetic factors.
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Affiliation(s)
- Stanisław Kondracki
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - Anna Wysokińska
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - Magdalena Kania
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - Krzysztof Górski
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
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9
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Maroto-Morales A, García-Álvarez O, Ramón M, Martínez-Pastor F, Fernández-Santos MR, Soler AJ, Garde JJ. Current status and potential of morphometric sperm analysis. Asian J Androl 2017; 18:863-870. [PMID: 27678465 PMCID: PMC5109877 DOI: 10.4103/1008-682x.187581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The spermatozoon is the most diverse cell type known and this diversity is considered to reflect differences in sperm function. How the diversity in sperm morphology arose during speciation and what role the different specializations play in sperm function, however, remain incompletely characterized. This work reviews the hypotheses proposed to explain sperm morphological evolution, with a focus on some aspects of sperm morphometric evaluation; the ability of morphometrics to predict sperm cryoresistance and male fertility is also discussed. For this, the evaluation of patterns of change of sperm head morphometry throughout a process, instead of the study of the morphometric characteristics of the sperm head at different stages, allows a better identification of the males with different sperm cryoconservation ability. These new approaches, together with more studies employing a greater number of individuals, are needed to obtain novel results concerning the role of sperm morphometry on sperm function. Future studies should aim at understanding the causes of sperm design diversity and the mechanisms that generate them, giving increased attention to other sperm structures besides the sperm head. The implementation of scientific and technological advances could benefit the simultaneous examination of sperm phenotype and sperm function, demonstrating that sperm morphometry could be a useful tool for sperm assessment.
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Affiliation(s)
| | - Olga García-Álvarez
- SaBio IREC (CSIC - UCLM - JCCM), Albacete, Spain.,Biomedical Center, Medical Faculty in Pilsen, Charles University in Prague, Pilsen, Czech Republic
| | - Manuel Ramón
- Regional Center of Animal Selection and Reproduction (CERSYRA) JCCM, Valdepeñas, Spain
| | - Felipe Martínez-Pastor
- Institute for Animal Health and Cattle Development, University of León, León, Spain.,Department of Molecular Biology, University of León, León, Spain
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Yániz JL, Vicente-Fiel S, Soler C, Recreo P, Carretero T, Bono A, Berné JM, Santolaria P. Comparison of different statistical approaches to evaluate morphometric sperm subpopulations in men. Asian J Androl 2017; 18:819-823. [PMID: 27624984 PMCID: PMC5109869 DOI: 10.4103/1008-682x.186872] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study was designed to characterize morphometric sperm subpopulations in normozoospermic men by using different statistical methods and examining their suitability to classify correctly different sperm nuclear morphologies present in human ejaculates. Ejaculates from 21 normozoospermic men were collected for the study. After semen collection and analysis, samples were prepared for morphometric determination. At least 200 spermatozoa per sample were assessed for sperm morphometry by computer-assisted sperm morphometry analysis (CASA-Morph) using fluorescence. Clustering and discriminant procedures were performed to identify sperm subpopulations from the morphometric data obtained. Clustering procedures resulted in the classification of spermatozoa into three morphometric subpopulations (large-round 30.4%, small-round 46.6%, and large-elongated 22.9%). In the second analysis, using discriminant methods, the classification was made independently of size and shape. Three morphological categories according to nuclear size (small <10.90 μm2, intermediate 10.91–13.07 μm2, and large >13.07 μm2) and four categories were defined on 400 canonical cells (100 × 4) from 10 men according to sperm nuclear shape (oval, pyriform, round, and elongated). Thereafter, the resulting classification functions were used to categorize 4200 spermatozoa from 21 men. Differences in the class distribution were observed among men from both clustering and discriminant procedures. It was concluded that the combination of CASA-Morph fluorescence-based technology with multivariate cluster or discriminant analyses provides new information on the description of different morphometric sperm subpopulations in normal individuals, and that important variations in the distribution of morphometric sperm subpopulations may exist between men, with possible functional implications.
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Affiliation(s)
- Jesús L Yániz
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Department of Animal Production and Food Sciences, Higher Polytechnic School, University of Zaragoza, Ctra. Cuarte S/N 22071 Huesca, Spain
| | - Sandra Vicente-Fiel
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Department of Animal Production and Food Sciences, Higher Polytechnic School, University of Zaragoza, Ctra. Cuarte S/N 22071 Huesca, Spain
| | - Carles Soler
- Department of Functional Biology and Physical Anthropology, University of Valencia, 46100 Burjassot, Valencia, Spain.,R+D Department, Proiser R+D, Scientific Park, University of Valencia, 46980 Paterna, Valencia, Spain
| | - Pilar Recreo
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Departament of Human Anatomy and Histology, Faculty of Health and Sport Sciences of Huesca, Plaza Universidad 3, 22002, Huesca, Spain
| | - Teresa Carretero
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Departament of Human Anatomy and Histology, Faculty of Health and Sport Sciences of Huesca, Plaza Universidad 3, 22002, Huesca, Spain
| | - Araceli Bono
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Hospital General San Jorge de Huesca, Area de Urología, Av. Martínez de Velasco, 36, 22004, Huesca, Spain
| | - José M Berné
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Hospital General San Jorge de Huesca, Area de Urología, Av. Martínez de Velasco, 36, 22004, Huesca, Spain
| | - Pilar Santolaria
- TECNOGAM research group, Environmental Sciences Institute (IUCA), Department of Animal Production and Food Sciences, Higher Polytechnic School, University of Zaragoza, Ctra. Cuarte S/N 22071 Huesca, Spain
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Urbano M, Ortiz I, Dorado J, Hidalgo M. Identification of sperm morphometric subpopulations in cooled-stored canine sperm and its relation with sperm DNA integrity. Reprod Domest Anim 2017; 52:468-476. [PMID: 28220615 DOI: 10.1111/rda.12935] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/03/2017] [Indexed: 11/30/2022]
Abstract
The aims of this study were to (i) identify different morphometric subpopulations in cooled-stored canine sperm and their patterns of distribution during cool-storage for up to 240 hr and (ii) determine whether or not morphometric sperm subpopulations (sP) are related to sperm DNA integrity. For that purpose, morphometric parameters were analysed by computer-assisted sperm analysis (CASA) and sperm DNA fragmentation (sDFi) using the sperm Halomax test. Four morphometric sperm heads subpopulations were identified: sP1 (large and rounded), sP2 (large and elongated), sP3 (small and rounded) and sP4 (small and elongated). sP1 was the most predominant subpopulation for up to 72 hr and thereafter sP3 increased progressively. sDFi increased after 48 hr of cool-storage. Although sP3 showed a positive correlation with sDFi, and both increased over time, it could not be ensured that only the sperm with fragmented DNA are accumulated in sP3. In conclusion, sP3 and DNA fragmentation increased progressively during cool-storage, becoming possible indicators of sperm damage. However, it cannot be concluded that sP3 only contains sperm with fragmented DNA.
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Affiliation(s)
- M Urbano
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, Cordoba, Spain
| | - I Ortiz
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, Cordoba, Spain
| | - J Dorado
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, Cordoba, Spain
| | - M Hidalgo
- Veterinary Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, Cordoba, Spain
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12
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Sperm head phenotype and male fertility in ram semen. Theriogenology 2015; 84:1536-41. [DOI: 10.1016/j.theriogenology.2015.07.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 11/18/2022]
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13
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Pradiee J, Esteso M, Lopez-Sebastián A, Toledano-Díaz A, Castaño C, Carrizosa J, Urrutia B, Santiago-Moreno J. Successful ultrarapid cryopreservation of wild Iberian ibex (Capra pyrenaica) spermatozoa. Theriogenology 2015; 84:1513-22. [DOI: 10.1016/j.theriogenology.2015.07.036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 07/28/2015] [Accepted: 07/28/2015] [Indexed: 12/28/2022]
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14
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Santiago-Moreno J, Esteso MC, Pradiee J, Castaño C, Toledano-Díaz A, O'Brien E, Lopez-Sebastián A, Martínez-Nevado E, Delclaux M, Fernández-Morán J, Zhihe Z. Giant panda (Ailuropoda melanoleuca) sperm morphometry and function after repeated freezing and thawing. Andrologia 2015; 48:470-4. [PMID: 26268795 DOI: 10.1111/and.12468] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2015] [Indexed: 01/17/2023] Open
Abstract
This work examines the effects of subsequent cycles of freezing-thawing on giant panda (Ailuropoda melanoleuca) sperm morphometry and function, and assesses whether density-gradient centrifugation (DGC) can increase the number of freezing-thawing cycles this sperm can withstand. A sperm sample was collected by electroejaculation from a mature giant panda and subjected to five freezing-thawing cycles. Although repeated freezing-thawing negatively affected (P < 0.05) sperm motility and membrane integrity, in both nonselected and DCG-selected sperm samples, >60% of the sperm cells in both treatments showed acrosome integrity even after the fifth freezing cycle. In fresh semen, the sperm head length was 4.7 μm, the head width 3.6 μm, area 14.3 μm(2) and perimeter length 14.1 μm. The present results suggest that giant panda sperm trends to be resistant to repeated freezing-thawing, even without DGC selection.
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Affiliation(s)
| | - M C Esteso
- Departamento de Reproducción Animal, INIA, Madrid, Spain
| | - J Pradiee
- Departamento de Reproducción Animal, INIA, Madrid, Spain.,Conselho Nacional de Desenvolvimento Cientifico e Tecnológico - Cnpq, Brasília, Brasil
| | - C Castaño
- Departamento de Reproducción Animal, INIA, Madrid, Spain
| | | | - E O'Brien
- Departamento de Reproducción Animal, INIA, Madrid, Spain
| | | | | | | | | | - Z Zhihe
- Chengdu Research Base of Giant Panda Breeding, Chengdu, China
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15
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Martínez-Rodríguez C, Alvarez M, López-Urueña E, Gomes-Alves S, Anel-López L, Tizado JE, Anel L, de Paz P. Head morphology of ram spermatozoa is associated with their ability to migrate in vitro and correlates with fertility. Reprod Fertil Dev 2015; 28:RD15022. [PMID: 26008853 DOI: 10.1071/rd15022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 04/26/2015] [Indexed: 11/23/2022] Open
Abstract
Fertility is a highly complex biological function that depends on several properties of spermatozoa that are necessary for them to overcome various barriers in the female reproductive tract to reach the fertilisation site. This ability has been evaluated in vitro using cervical mucus migration tests. Head morphology has been widely studied, and various studies have reported correlations between head morphology and motility, fertility and DNA fragmentation. In the present study, we first evaluated the relationship between the ability of ram spermatozoa to overcome the mucus surrogate barrier in an in vitro migration test and sperm head morphology. Sperm motility (determined by computer-aided sperm analysis) and the acrosomal status, viability and mitochondrial status (determined by flow cytometry) of control and migrating spermatozoa were assessed. Principal component analysis and clustering analysis of the values for the morphometric parameters assessed defined three cell subpopulations. One of these subpopulations, namely spermatozoa with a short and wide head, was absent from samples collected after conclusion of the migration test. Second, we evaluated relationships among head morphology characteristics, the ability to penetrate the artificial mucus and fertility. We did not find any correlation between fertility and the number of spermatozoa that migrated, whereas there was a negative correlation between the proportion of spermatozoa with a short and wide head in the fresh sperm sample and fertility. In conclusion, the head morphology of spermatozoa was associated with their ability to overcome a mucus barrier in a migration test, and the relative size of the non-migrating subpopulation was negatively related to male fertility.
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16
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Yániz JL, Soler C, Santolaria P. Computer assisted sperm morphometry in mammals: A review. Anim Reprod Sci 2015; 156:1-12. [PMID: 25802026 DOI: 10.1016/j.anireprosci.2015.03.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 02/26/2015] [Accepted: 03/01/2015] [Indexed: 11/19/2022]
Affiliation(s)
- J L Yániz
- TECNOGAM Research Group, Environmental Sciences Institute (IUCA), University of Zaragoza, Huesca, Spain.
| | - C Soler
- Department of Functional Biology and Physical Anthropology, University of Valencia, Valencia, Spain
| | - P Santolaria
- TECNOGAM Research Group, Environmental Sciences Institute (IUCA), University of Zaragoza, Huesca, Spain
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17
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Esteso M, Rodríguez E, Toledano-Díaz A, Castaño C, Pradiee J, López-Sebastián A, Santiago-Moreno J. Descriptive analysis of sperm head morphometry in Iberian ibex (Capra pyrenaica): Optimum sampling procedure and staining methods using Sperm-Class Analyzer®. Anim Reprod Sci 2015; 155:42-9. [DOI: 10.1016/j.anireprosci.2015.01.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 01/28/2015] [Accepted: 01/30/2015] [Indexed: 11/25/2022]
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18
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DNA fragmentation and sperm head morphometry in cat epididymal spermatozoa. Theriogenology 2014; 82:982-7. [PMID: 25129872 DOI: 10.1016/j.theriogenology.2014.07.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 07/07/2014] [Accepted: 07/10/2014] [Indexed: 11/23/2022]
Abstract
Sperm DNA fragmentation is an important parameter to assess sperm quality and can be a putative fertility predictor. Because the sperm head consists almost entirely of DNA, subtle differences in sperm head morphometry might be related to DNA status. Several techniques are available to analyze sperm DNA fragmentation, but they are labor-intensive and require expensive instrumentations. Recently, a kit (Sperm-Halomax) based on the sperm chromatin dispersion test and developed for spermatozoa of different species, but not for cat spermatozoa, became commercially available. The first aim of the present study was to verify the suitability of Sperm-Halomax assay, specifically developed for canine semen, for the evaluation of DNA fragmentation of epididymal cat spermatozoa. For this purpose, DNA fragmentation indexes (DFIs) obtained with Sperm-Halomax and terminal deoxynucleotidyl transferase-mediated nick-end labeling (TUNEL) were compared. The second aim was to investigate whether a correlation between DNA status, sperm head morphology, and morphometry assessed by computer-assisted semen analysis exists in cat epididymal spermatozoa. No differences were observed in DFIs obtained with Sperm-Halomax and TUNEL. This result indicates that Sperm-Halomax assay provides a reliable evaluation of DNA fragmentation of epididymal feline spermatozoa. The DFI seems to be independent from all the measured variables of sperm head morphology and morphometry. Thus, the evaluation of the DNA status of spermatozoa could effectively contribute to the completion of the standard analysis of fresh or frozen semen used in assisted reproductive technologies.
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Urbano M, Dorado J, Ortiz I, Morrell JM, Demyda-Peyrás S, Gálvez MJ, Alcaraz L, Ramírez L, Hidalgo M. Effect of cryopreservation and single layer centrifugation on canine sperm DNA fragmentation assessed by the sperm chromatin dispersion test. Anim Reprod Sci 2013; 143:118-25. [PMID: 24210910 DOI: 10.1016/j.anireprosci.2013.10.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 09/24/2013] [Accepted: 10/16/2013] [Indexed: 11/15/2022]
Abstract
The aims of this study were: 1) to assess the effect of freezing and thawing on dog sperm DNA fragmentation index (sDFI) using the sperm chromatin dispersion test (SCDt); and 2) to determine whether or not the sperm selection by single layer centrifugation (SLC) using Androcoll-C improves sperm DNA longevity in SLC-selected frozen-thawed dog semen samples. Semen samples were collected from 4 dogs using digital manipulation. After collection, ejaculates were pooled and cryopreserved following a standard protocol. Sperm motility and morphology were assessed before freezing and after thawing as a control for the cryopreservation method used. In experiment 1, sDFI was analyzed immediately before freezing and after thawing (baseline values), showing no significant differences between fresh and frozen-thawed semen samples. In experiment 2, frozen-thawed semen samples were processed or not by SLC using Androcoll-C and longevity of DNA were assessed in terms of sDFI after 24h of in vitro incubation at physiological temperature (38°C). The results showed low values of sDFI in SLC-selected semen in comparison to unselected samples. In conclusion, no effect of cryopreservation was observed on baseline values of dog sperm DNA fragmentation. Additionally, SLC-selection using Androcoll-C improved longevity of frozen-thawed sperm DNA assessed by the SCDt.
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Affiliation(s)
- M Urbano
- Animal Reproduction Group, Department of Animal Medicine and Surgery, University of Cordoba, Cordoba, Spain
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20
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A comparative study of sperm morphometric subpopulations in cattle, goat, sheep and pigs using a computer-assisted fluorescence method (CASMA-F). Anim Reprod Sci 2013; 139:182-9. [DOI: 10.1016/j.anireprosci.2013.04.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/29/2013] [Accepted: 04/05/2013] [Indexed: 11/30/2022]
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21
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Ramón M, Pérez-Guzmán MD, Jiménez-Rabadán P, Esteso MC, García-Álvarez O, Maroto-Morales A, Anel-López L, Soler AJ, Fernández-Santos MR, Garde JJ. Sperm cell population dynamics in ram semen during the cryopreservation process. PLoS One 2013; 8:e59189. [PMID: 23544054 PMCID: PMC3609831 DOI: 10.1371/journal.pone.0059189] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 02/12/2013] [Indexed: 01/07/2023] Open
Abstract
Background Sperm cryopreservation has become an indispensable tool in biology. Initially, studies were aimed towards the development of efficient freezing protocols in different species that would allow for an efficient storage of semen samples for long periods of time, ensuring its viability. Nowadays, it is widely known that an important individual component exists in the cryoresistance of semen, and efforts are aimed at identifying those sperm characteristics that may allow us to predict this cryoresistance. This knowledge would lead, ultimately, to the design of optimized freezing protocols for the sperm characteristics of each male. Methodology/Principal Findings We have evaluated the changes that occur in the sperm head dimensions throughout the cryopreservation process. We have found three different patterns of response, each of one related to a different sperm quality at thawing. We have been able to characterize males based on these patterns. For each male, its pattern remained constant among different ejaculates. This latter would imply that males always respond in the same way to freezing, giving even more importance to this sperm feature. Conclusions/Significance Changes in the sperm head during cryopreservation process have resulted useful to identify the ability of semen of males for freezing. We suggest that analyses of these response patterns would represent an important tool to characterize the cryoresistance of males when implemented within breeding programs. We also propose follow-up experiments to examine the outcomes of the use of different freezing protocols depending on the pattern of response of males.
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Affiliation(s)
- Manuel Ramón
- CERSYRA, Junta de Comunidades de Castilla-La Mancha, Valdepeñas, Spain.
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22
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The percentage of spermatozoa lost during the centrifugation of brown bear (Ursus arctos) ejaculates is associated with some spermatozoa quality and seminal plasma characteristics. Anim Reprod Sci 2012; 135:113-21. [DOI: 10.1016/j.anireprosci.2012.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 09/10/2012] [Accepted: 09/12/2012] [Indexed: 11/22/2022]
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23
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Maroto-Morales A, Ramón M, García-Álvarez O, Soler A, Fernández-Santos M, Roldan E, Gomendio M, Pérez-Guzmán M, Garde J. Morphometrically-distinct sperm subpopulations defined by a multistep statistical procedure in Ram ejaculates: intra- and interindividual variation. Theriogenology 2012; 77:1529-39. [DOI: 10.1016/j.theriogenology.2011.11.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2011] [Revised: 11/27/2011] [Accepted: 11/27/2011] [Indexed: 11/28/2022]
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24
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Nicolas M, Alvarez M, Borragán S, Martinez-Pastor F, Chamorro CA, Alvarez-Rodriguez M, de Paz P, Anel L. Evaluation of the qualitative and quantitative effectiveness of three media of centrifugation (Maxifreeze, Cushion Fluid Equine, and PureSperm 100) in preparation of fresh or frozen-thawed brown bear spermatozoa. Theriogenology 2011; 77:1119-28. [PMID: 22154477 DOI: 10.1016/j.theriogenology.2011.10.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 09/28/2011] [Accepted: 10/08/2011] [Indexed: 11/19/2022]
Abstract
Centrifugation is a crucial procedure in sperm cryopreservation protocols of brown bear (Ursus arctos), because the semen must be processed to increase sperm concentration and/or clean urine-contaminated samples. The efficacy of three media for centrifugation (Maxifreeze [IMV technologies, L'Aigle, France], Cushion Fluid Equine (Minitübe, Tiefenbach, Germany), and PureSperm [Nidacon, Gothenburg, Sweden]) on the quality of bear spermatozoa was evaluated. In experiment one, two cushioned media used for protecting against mechanical stress during centrifugation were analyzed. In experiment two, a density gradient based on PureSperm was assessed in relation to the maximum retrieval and the quality of fresh spermatozoa, and the freezability of the spermatozoa selected in this density gradient was studied in experiment three. Finally, the selection of frozen-thawed sperm using PureSperm was analyzed in experiment four. Our results indicate that the use of dense isotonic cushion solutions (Maxifreeze, Cushion Fluid Equine) in centrifugation did not improve the quality of recovered spermatozoa compared with standard centrifugation. However, a density gradient prepared with PureSperm improved the quality of spermatozoa in fresh semen and frozen-thawed semen, but the spermatozoa selected from the fresh sample with this density gradient did not show a better resistance to freezing with this density gradient in comparison with the control sample.
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Affiliation(s)
- M Nicolas
- ITRA-ULE, INDEGSAL, University of León, León, Spain
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25
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The relationship between ram sperm head morphometry and fertility depends on the procedures of acquisition and analysis used. Theriogenology 2011; 76:1313-25. [DOI: 10.1016/j.theriogenology.2011.05.038] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Revised: 05/27/2011] [Accepted: 05/29/2011] [Indexed: 11/22/2022]
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26
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Butts IAE, Ward MAR, Litvak MK, Pitcher TE, Alavi SMH, Trippel EA, Rideout RM. Automated sperm head morphology analyzer for open-source software. Theriogenology 2011; 76:1756-1761.e1-3. [PMID: 21962916 DOI: 10.1016/j.theriogenology.2011.06.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 06/15/2011] [Accepted: 06/18/2011] [Indexed: 11/25/2022]
Abstract
Sperm head morphology has been identified as a characteristic that can be used to predict a male's semen quality. In the present study, we have developed an automated sperm head morphology analysis (ASMA) plug-in for open-source ImageJ software (http://rsbweb.nih.gov/ij/). We describe the plug-in's functionality, and confirm its validity for sperm head morphology analysis using fish sperm. Sperm head morphological measurements (length and width) made with the ASMA plug-in did not differ from manual measurements. Using the plug-in to measure sperm head-shaped objects of known size, the associated plug-in error rate was < 0.5%. Brightness and contrast ratios influenced sperm head measurements, suggesting the need for standardized protocols. This plug-in was effective at measuring elliptical (i.e., Atlantic cod) as well as slightly irregular (i.e., Chinook salmon) shaped sperm heads. In conclusion, our ASMA plug-in represents a versatile alternative to costly sperm morphology software.
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Affiliation(s)
- I A E Butts
- Department of Biological Sciences, University of Windsor, Windsor, ON, Canada.
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27
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Butts I, Babiak I, Ciereszko A, Litvak M, Słowińska M, Soler C, Trippel E. Semen characteristics and their ability to predict sperm cryopreservation potential of Atlantic cod, Gadus morhua L. Theriogenology 2011; 75:1290-300. [DOI: 10.1016/j.theriogenology.2010.11.044] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 11/10/2010] [Accepted: 11/28/2010] [Indexed: 10/18/2022]
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28
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Martínez-Pastor F, Tizado EJ, Garde JJ, Anel L, de Paz P. Statistical Series: Opportunities and challenges of sperm motility subpopulation analysis. Theriogenology 2011; 75:783-95. [DOI: 10.1016/j.theriogenology.2010.11.034] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Revised: 11/05/2010] [Accepted: 11/17/2010] [Indexed: 11/25/2022]
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29
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The disruption in actin-perinuclear theca interactions are related with changes induced by cryopreservation observed on sperm chromatin nuclear decondensation of boar semen. Cryobiology 2011; 62:32-9. [DOI: 10.1016/j.cryobiol.2010.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 10/19/2010] [Accepted: 11/03/2010] [Indexed: 11/22/2022]
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30
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Brito L, Sertich P, Stull G, Rives W, Knobbe M. Sperm ultrastructure, morphometry, and abnormal morphology in American black bears (Ursus americanus). Theriogenology 2010; 74:1403-13. [DOI: 10.1016/j.theriogenology.2010.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 05/27/2010] [Accepted: 06/11/2010] [Indexed: 10/19/2022]
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31
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Characterization of ram (Ovis aries) sperm head morphometry using the Sperm-Class Analyzer. Theriogenology 2010; 73:437-48. [DOI: 10.1016/j.theriogenology.2009.10.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Revised: 08/05/2009] [Accepted: 10/09/2009] [Indexed: 11/18/2022]
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