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Khaledi S, Towhidi A, Movahedin M, Nikkhah M, Halvaei I. Evaluation of the effect of lecithin and nanolecithin in repairing membrane damage, maintaining membrane integrity, and improving human sperm function in the freezing-thawing process. J Assist Reprod Genet 2024:10.1007/s10815-024-03258-8. [PMID: 39316329 DOI: 10.1007/s10815-024-03258-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Accepted: 09/09/2024] [Indexed: 09/25/2024] Open
Abstract
PURPOSE Our study aimed to evaluate the effects of lecithin nanoparticles on sperm quality during cryopreservation. METHODS In phase one, sperm-freezing media were prepared with lecithin concentrations (0.5%, 1%, and 2%) and lecithin nanoparticles of various sizes (50-100, 100-200, and ≥ 200 nm). Post-thaw, sperm motility, viability, mitochondrial membrane potential (MMP), lipid peroxidation (measured by malondialdehyde, MDA), and DNA fragmentation were evaluated. In phase two, the acrosomal reaction was assessed in the best and worst-performing groups from phase one. DiI labeling detected interactions between lecithin nanoparticles and the sperm membrane. Field emission scanning electron microscopy (FESEM) examined the sperm membrane's surface structure and lecithin binding sites. Atomic force microscopy (AFM) assessed height differences in the sperm surface layer in the best-performing group from phase one. RESULTS The group treated with 1% lecithin nanoparticles (50-100 nm) showed significantly increased viability post-thaw compared to other groups, with reduced DNA fragmentation and MDA levels. While motility significantly decreased in all groups compared to before freezing levels, lower concentrations, and smaller particle sizes yielded better results. MMP also significantly decreased across all groups with no significant differences. The acrosomal reaction significantly decreased with 1% lecithin nanoparticles (50-100 nm) compared to the 2% (≥ 200 nm) group. DiI-labeled nanoparticles and FESEM revealed that lecithin nanoparticles primarily bound to and infiltrated the sperm membrane, particularly in the head and postacrosomal regions. CONCLUSIONS Lecithin nanoparticles effectively bind to the sperm membrane, protecting it during the freeze-thaw process and improving sperm viability.
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Affiliation(s)
- Sajed Khaledi
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Jalal-Ale-Ahmad Avenue, Nasr Bridge, Tehran, 14155-331, Iran
| | - Armin Towhidi
- Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mansoureh Movahedin
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Jalal-Ale-Ahmad Avenue, Nasr Bridge, Tehran, 14155-331, Iran
| | - Maryam Nikkhah
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Iman Halvaei
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Jalal-Ale-Ahmad Avenue, Nasr Bridge, Tehran, 14155-331, Iran.
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García MF, Favre RN, Rearte R, Stornelli MC, Jurado S, de la Sota L, Stornelli MA. Effect of seminal plasma cholesterol and triacylglycerides concentrations and sperm morphology on semen freezability in domestic cats (Felis silvestris catus). Top Companion Anim Med 2024; 62:100907. [PMID: 39168446 DOI: 10.1016/j.tcam.2024.100907] [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: 05/12/2023] [Revised: 08/14/2024] [Accepted: 08/14/2024] [Indexed: 08/23/2024]
Abstract
There is scarce information about the effect of sperm morphology and seminal plasma composition on cat semen freezability. Thus, this study aims to assess the effect of cat sperm morphology and seminal plasma cholesterol (CHOL) and triacylglyceride (TAG) concentrations on sperm post-thaw survival. Ejaculates (n = 49) were evaluated, and seminal plasma was separated and frozen until CHOL and TAG concentrations were measured. The sperm pellet was diluted in a tris-based egg yolk extender, frozen (n = 38), or processed for sperm ultrastructure study (n = 11). Abnormalities recorded were abnormal head shape and size, detached heads, knobbed or ruffled acrosomes, eccentric mid-piece insertion, proximal and distal cytoplasmic droplets, folded and coiled tails, and Dag defect. Ultramicroscopic evaluation detected several sperm abnormalities in fresh semen and some sperm damage in frozen semen. Seminal plasma lipids components were positively correlated with post-thaw motility and acrosome integrity. Higher freezability indices for motility and acrosome integrity were observed in frozen-thawed semen with high seminal plasma CHOL and TAG concentrations. No freezability differences were observed between teratozoospermic and normozoospermic ejaculates. Our results showed that even when seminal plasma was removed before cryopreservation, sperm survival after thawing was significantly higher in samples with high seminal plasma CHOL and TAG concentrations, indicating a rapid adherence to these compounds to the sperm plasma membrane, protecting sperm cells from temperature changes. Nevertheless, there were no differences in sperm freezability by sperm morphology.
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Affiliation(s)
- María Florencia García
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Romina Nuñez Favre
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Ramiro Rearte
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - María Cecilia Stornelli
- Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Susana Jurado
- Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - Luzbel de la Sota
- National Scientific and Technical Research Council -CONICET, CABA, Argentina; Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina
| | - María Alejandra Stornelli
- Instituto de Investigaciones en Reproducción Animal, Faculty of Veterinary Sciences, La Plata National University, Argentina.
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Ligocka Z, Partyka A, Bonarska-Kujawa D, Mucha A, Niżański W. Addition of low concentration of cholesterol-loaded cyclodextrin (CLC) has a positive effect on cryopreserved canine spermatozoa evaluated by andrological and biophysical methods. BMC Vet Res 2024; 20:7. [PMID: 38172806 PMCID: PMC10763487 DOI: 10.1186/s12917-023-03851-6] [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: 01/04/2023] [Accepted: 12/13/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND This study was conducted to find the best concentration of cholesterol-loaded cyclodextrin (CLC) which has a positive impact on canine post thaw semen quality. Three different concentrations of CLC (0.83 mg/ml; 1.66 mg/ml; 3.32 mg/ml) and 2-hydroxylpropyl-beta-cyclodextrin (HBCD) (1.66 mg/ml) were used in addition to cryopreservation extender and compared with the control after thawing. Samples were assessed using computer-assisted semen analyzer (CASA), flow cytometry, fluorimeter by measuring the fluorescence anisotropy (ANISO) and determining the generalized membrane polarization (GP). RESULTS An addition of 0.83 mg/ml CLC significantly increased the percentage of progressive motile (PROG) and rapid spermatozoa (RAP) (P < 0.05). 1.66 mg/ml HBCD decreased progressive motility of spermatozoa and population with rapid movement relative to the control (P < 0.05). Furthermore, the groups with an addition of 1.66 mg/ml and 3.32 mg/ml of CLC, as well as the group with only cyclodextrin, increased percentage of dead spermatozoa without lipid peroxidation and decreased percentage of viable spermatozoa without LPO which was lower in these groups than in the control (P < 0.05). Other sperm parameters assessed on flow cytometer were not significantly different. The addition of CLC at 0.83 mg/ml and 3.32 mg/ml concentrations and 1.66 mg/ml of HBCD caused an increase in ANISO measured at 23 ºC (P < 0.05). CONCLUSIONS In conclusion, the results suggest that increasing cholesterol in the plasma membrane of canine spermatozoa can improve their freezability. However, only low concentrations of CLC may improve semen quality after thawing without adversely affecting other parameters.
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Affiliation(s)
- Zuzanna Ligocka
- Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Plac Grunwaldzki 49, 50-366, Wroclaw, Poland
| | - Agnieszka Partyka
- Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Plac Grunwaldzki 49, 50-366, Wroclaw, Poland
| | - Dorota Bonarska-Kujawa
- Department of Physics and Biophysics, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, Norwida 25, 50-375, Wroclaw, Poland
| | - Anna Mucha
- Department of Genetics, Faculty of Biology and Animal Science, Wroclaw University of Environmental and Life Sciences, Kożuchowska 7, 51-631, Wroclaw, Poland
| | - Wojciech Niżański
- Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Plac Grunwaldzki 49, 50-366, Wroclaw, Poland.
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Ligocka Z, Partyka A, Schäfer-Somi S, Mucha A, Niżański W. Does Better Post-Thaw Motility of Dog Sperm Frozen with CLC Mean Better Zona Pellucida Binding Ability? Animals (Basel) 2023; 13:ani13101580. [PMID: 37238010 DOI: 10.3390/ani13101580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/01/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023] Open
Abstract
Even though the search for methods improving cryopreservation of canine spermatozoa led to an improvement of post-thaw quality, fertilizing results after insemination with frozen-thawed semen are still not satisfying. In this study, we focused on modification of spermatozoa membrane fluidity and investigated whether kinematic parameters as assessed by computer-assisted semen analyzer (CASA) can be improved. The primary aim of our study was to investigate whether the use of cholesterol-loaded cyclodextrins (CLC; 0.5 mg, 1 mg, 2 mg) and 2-Hydroxypropyl-ß-cyclodextrin (HBCD; 1 mg) positively influence capacitation status as examined by tyrosinphosphorylation, cholesterol efflux and zona binding assay (ZBA) of spermatozoa. The use of 0.5 mg of CLC increased the percentage of motile, progressive and rapid spermatozoa compared to the control. Addition of HBCD decreased motility and progressive motility of spermatozoa and the population with rapid movement in comparison to the control. The percentage of live spermatozoa without efflux of cholesterol compared to the control was increased when extender with 0.5 mg of CLC was used. There was no change in capacitation status. The zona binding ability of spermatozoa was significantly lower in the group with 0.5 mg of CLC than in the control. In conclusion, these results suggest that improvement of kinematic parameters does not necessarily coincide with better zona pellucida binding ability of spermatozoa.
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Affiliation(s)
- Zuzanna Ligocka
- Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Plac Grunwaldzki 49, 50-366 Wrocław, Poland
| | - Agnieszka Partyka
- Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Plac Grunwaldzki 49, 50-366 Wrocław, Poland
| | - Sabine Schäfer-Somi
- Platform for Artificial Insemination and Embryo Transfer, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Anna Mucha
- Department of Genetics, Faculty of Biology and Animal Science, Wroclaw University of Environmental and Life Sciences, Kożuchowska 7, 51-631 Wrocław, Poland
| | - Wojciech Niżański
- Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Plac Grunwaldzki 49, 50-366 Wrocław, Poland
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El-Sheshtawy R, Mostafa A, El-Belely M, Ismail S, Shahba M. Effect of cholesterol-loaded cyclodextrin enriched extenders on the quality of prefrozen and frozen buffalo semen. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2022. [DOI: 10.4103/2305-0500.346093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Application of High Hydrostatic Pressure (HHP) to Improve Cryopreservation of Young Bull Semen. ANNALS OF ANIMAL SCIENCE 2021. [DOI: 10.2478/aoas-2021-0059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
The objective of the study was to determine the effect of high hydrostatic pressure (HHP) on quality of cryopreserved semen of young bulls. Semen for this study was collected from 8 bulls aged between 13 and 18 months at monthly intervals, from June to September. After collection, semen was diluted in a commercial Bioxcell® extender (one part at 1:1 and a second part to give a sperm concentration of 20 million/0.2 mL), filled into straws and treated with HHP at 30 MPa for 90 min. After HHP treatment, pre-diluted semen (1:1) was diluted to a sperm concentration 20 million/0.2 mL and filled into straws. In addition, part of the semen diluted to a concentration of 20 million/0.2 mL was not treated with HHP (control). All of it was held at +4°C and frozen in a freezer after 2.5-h equilibration. Semen was thawed in a water bath at 38°C and subjected to estimation of the percentage of motile sperm both subjectively and using a computer-assisted semen analyzer and cytometric assessment of sperm cell membrane integrity. Subjective motility and fast progressive motility were significantly higher with pre-diluted (1:1) and HHP treated semen compared to control (P<0.05). No significant differences were observed in percentage of membraneintact spermatozoa between control and experimental groups. Additionally, the influence of HHP on the sperm of individual bulls was assessed. In bull number 2, the HHP treatment after semen pre-dilution significantly improved progressive motility from 54.1 to 63.4 percent (P<0.05). In bull number 4, the HHP treatment after semen pre-dilution significantly improved subjective motility, rapid motility and progressive motility by 12.5, 16.8 and 16.3 percent, respectively (P<0.05). No effect was seen for 6 bulls. It is concluded that for some bulls, the application of HHP before semen freezing may improve the cryopreservation outcome. However, this requires further research in this area, also to determine the fertilizing capacity of bull semen exposed to high hydrostatic pressure.
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Characteristics of bull sperm acrosome associated 1 proteins. Anim Reprod Sci 2020; 218:106479. [PMID: 32507260 DOI: 10.1016/j.anireprosci.2020.106479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 04/23/2020] [Accepted: 04/23/2020] [Indexed: 11/22/2022]
Abstract
An atypical distribution of sperm acrosomal tyrosine-phosphorylated proteins [which include sperm acrosome associated 1 (SPACA1) proteins] may be related to the relatively lesser pregnancy rates when semen of some bulls are used for artificial insemination (AI). There may also be these associations with bull SPACA1 proteins that are translocated from the equatorial segment to the anterior part in the acrosomes during sperm maturation in the normally functioning epididymis. The aim of the present study, therefore, was assessment of the characteristics of bull SPACA1 proteins. Results from immunocytochemical evaluations indicate there were large variations in sperm percentages with typically distributed SPACA1 proteins in acrosomes of cauda epididymal sperm samples (7%-95%). These values were positively correlated with percentages of epididymal spermatozoa with typically distributed acrosomal tyrosine-phosphorylated proteins (r=0.8564, P<0.001). Results indicate there are individual differences in translocation of SPACA1 proteins in the epididymis during sperm maturation, and that SPACA1 protein is one of the main determinants for the typical distribution of acrosomal tyrosine-phosphorylated proteins. In addition, conception rates as a result of AI using cryopreserved spermatozoa tended to be associated with percentages of epididymal spermatozoa with typically distributed SPACA1 proteins. Results from sucrose gradient centrifugation fractionation experiments indicate SPACA1 proteins are sperm membrane raft-associated proteins. Based on these results, it is hypothesized that there is an association between bull subfertility when semen is used for AI and epididymal dysfunctions in the arrangement of membrane lipid rafts during sperm maturation.
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Rajoriya JS, Prasad JK, Ramteke SS, Perumal P, De AK, Ghosh SK, Bag S, Raje A, Singh M, Kumar A, Kumaresan A. Exogenous cholesterol prevents cryocapacitation‐like changes, membrane fluidity, and enhances in vitro fertility in bubaline spermatozoa. Reprod Domest Anim 2020; 55:726-736. [DOI: 10.1111/rda.13674] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 02/18/2020] [Accepted: 03/11/2020] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | - Ponraj Perumal
- ICAR‐Central Island Agricultural Research Institute Port Blair India
| | - Arun Kumar De
- ICAR‐Central Island Agricultural Research Institute Port Blair India
| | | | - Sadhan Bag
- ICAR‐Indian Veterinary Research Institute Bareilly India
| | - Archana Raje
- ICAR‐Indian Veterinary Research Institute Bareilly India
| | - Mahak Singh
- ICAR‐ICAR Research Complex for NEH Region Medziphema India
| | - Anuj Kumar
- DUVASU‐College of Veterinary Science and Animal Husbandry Mathura India
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Gungor S, Inanc ME, Ozturk C, Korkmaz F, Bastan I, Cil B, Kastelic JP. Gallic and carnosic acids improve quality of frozen-thawed ram spermatozoa. Andrologia 2019; 51:e13393. [PMID: 31423610 DOI: 10.1111/and.13393] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/18/2019] [Accepted: 07/19/2019] [Indexed: 12/15/2022] Open
Abstract
The objective was to determine effects of gallic acid (GA) and carnosic acid (CA), present in carob pods and rosemary extract respectively, on frozen-thawed ram spermatozoa. Thirty ejaculates were collected from five Merino rams, pooled, diluted in Tris-based extender and divided into five equal portions containing: 0.05 or 2 mM of GA; 0.05 or 0.2 mM of CA; or no additive (control). Extended semen was equilibrated at +4°C, loaded into straws, held 5 cm above liquid nitrogen for 12 min then plunged. Computer-aided sperm analysis was used to assess motility, whereas flow cytometry was used to assess high mitochondrial membrane potential (HMMP) and percentages of spermatozoa with plasma membrane and acrosome integrity (PMAI). Spermatozoa supplemented with 2 mM GA had greater total motility than control spermatozoa (39.9 ± 3.01 vs. 29.2 ± 1.31%, mean ± SEM, p < .05). The PMAI was greatest in 0.2 mM CA (13.3 ± 0.68%), whereas HMMP was highest in 0.05 mM CA but lowest in control (22.9 ± 4.95 and 11.4 ± 3.64% respectively; p < .05). In conclusion, for cryopreservation of ram semen in Tris-based extender, supplementation with 2 mM GA increased post-thaw motility, whereas supplementation with 0.05 mM CA enhanced mitochondrial function.
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Affiliation(s)
- Sukru Gungor
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Muhammed E Inanc
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Caner Ozturk
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Aksaray University, Aksaray, Turkey
| | - Firat Korkmaz
- International Center for Livestock Research and Training, Ankara, Turkey
| | - Ilktan Bastan
- International Center for Livestock Research and Training, Ankara, Turkey
| | - Beste Cil
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Ankara University, Ankara, Turkey
| | - John P Kastelic
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
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SRIVASTAVA N, PANDE MEGHA, RAJA TV, TYAGI S, KUMAR SURESH, KUMAR SUSHIL, KUMAR RAVINDER, SIROHI AS, CHAND NAIMI, ARYA S, KUMAR AMIT, DIN OMER. Prognostic value of post thaw semen quality parameters, mitochondrial integrity and cholesterol content of sperm membrane vis-à-vis conception rate in Frieswal bulls. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2018. [DOI: 10.56093/ijans.v88i8.82911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The present study aimed to analyze the quantitative relationship of membrane cholesterol content (Chol content), mitochondrial integrity (Δψm), and quality parameters of spermatozoa (SQP) at post-thaw stage with conception rate (CR) and estimated relative conception rate (ERCR) in Frieswal bulls. For the experiment, frozen semen straws (32) were collected from the SF laboratory and CR (Total insemination 3482) was obtained from Field Progeny Testing units. Based on the CR, bulls were grouped into low, medium or high groups (G I, G II and G III, respectively). SQP, viz. viability (Eosin Nigrosin), post thaw motility, biochemical integrity of the membrane (HOS res), acrosome integrity (Giemsa, and fluorochromes fluorescein isothiocyanate Pisum sativum agglutinin and propidium iodide, respectively), chol-content, and Δψm using fluorescent probe JC-1 (5,5’,6,6’-tetrachloro- 1,1’,3,3’-tetraethylbenzimi-dazolylcarbocyanine iodide) were determined. The values thus obtained were subjected to the stepwise regression analysis using the least squares principles for each group, and the CR and ERCR were regressed on the various SQP. Pearson’s correlation coefficients were estimated between the CR and ERCR values and the various SQPs. The coefficient of determination (R2) moderately higher for all the models and ranged from 63.70–93.40% (high and medium group, respectively). High R2 value of the prediction equation for the herd and bulls with medium CR (75.9 and 93.4%, respectively) reveal their suitability to predict the CR and ERCR potential of the cryopreserved semen. Study results point to inclusion of cholesterol content and Δψm estimation in routine semen analysis before long-term storage or usage for insemination purposes.
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Abstract
Many biotechnologies are currently used in livestock breeding with the aim of improving reproductive efficiency and increasing the rate of genetic progress in production animals. Semen cryopreservation is the most widely used cryobiotechnology, although vitrification techniques now allow embryos and oocytes to be banked in ever-increasing numbers. Cryopreservation of other types of germplasm (reproductive tissue in general) is also possible, although the techniques are still in the early stages of development for use in livestock species. Although still in their infancy, these techniques are increasingly being used in aquaculture. Germplasm conservation enables reproductive tissues from both animals and fish to be preserved to generate offspring in the future without having to maintain large numbers of living populations of these species. However, such measures need careful planning and coordination. This review explains why the preservation of genetic diversity is needed for livestock and fish, and describes some of the issues involved in germplasm banking. Furthermore, some recent developments in semen handling leading to improved semen cryopreservation and biosecurity measures are also discussed.
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Free cholesterol and cholesterol esters in bovine oocytes: Implications in survival and membrane raft organization after cryopreservation. PLoS One 2017; 12:e0180451. [PMID: 28686720 PMCID: PMC5501518 DOI: 10.1371/journal.pone.0180451] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 05/20/2017] [Indexed: 01/01/2023] Open
Abstract
Part of the damage caused by cryopreservation of mammalian oocytes occurs at the plasma membrane. The addition of cholesterol to cell membranes as a strategy to make it more tolerant to cryopreservation has been little addressed in oocytes. In order to increase the survival of bovine oocytes after cryopreservation, we proposed not only to increase cholesterol level of oocyte membranes before vitrification but also to remove the added cholesterol after warming, thus recovering its original level. Results from our study showed that modulation of membrane cholesterol by methyl-β-cyclodextrin (MβCD) did not affect the apoptotic status of oocytes and improved viability after vitrification yielding levels of apoptosis closer to those of fresh oocytes. Fluorometric measurements based on an enzyme-coupled reaction that detects both free cholesterol (membrane) and cholesteryl esters (stored in lipid droplets), revealed that oocytes and cumulus cells present different levels of cholesterol depending on the seasonal period. Variations at membrane cholesterol level of oocytes were enough to account for the differences found in total cholesterol. Differences found in total cholesterol of cumulus cells were explained by the differences found in both the content of membrane cholesterol and of cholesterol esters. Cholesterol was incorporated into the oocyte plasma membrane as evidenced by comparative labeling of a fluorescent cholesterol. Oocytes and cumulus cells increased membrane cholesterol after incubation with MβCD/cholesterol and recovered their original level after cholesterol removal, regardless of the season. Finally, we evaluated the effect of vitrification on the putative raft molecule GM1. Cholesterol modulation also preserved membrane organization by maintaining ganglioside level at the plasma membrane. Results suggest a distinctive cholesterol metabolic status of cumulus-oocyte complexes (COCs) among seasons and a dynamic organizational structure of cholesterol homeostasis within the COC. Modulation of membrane cholesterol by MβCD improved survival of bovine oocytes and preserved integrity of GM1-related rafts after vitrification.
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Yadav HP, Kumar A, Shah N, Chauhan DS, Saxena A, Yadav S, Swain DK. Effect of cholesterol loaded cyclodextrin supplementation on tyrosine phosphorylation and apoptosis like changes in frozen thawed Hariana bull spermatozoa. Theriogenology 2017; 96:164-171. [DOI: 10.1016/j.theriogenology.2017.04.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 04/07/2017] [Accepted: 04/08/2017] [Indexed: 11/26/2022]
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Chuaychu-noo N, Thananurak P, Chankitisakul V, Vongpralub T. Supplementing rooster sperm with Cholesterol-Loaded-Cyclodextrin improves fertility after cryopreservation. Cryobiology 2017; 74:8-12. [DOI: 10.1016/j.cryobiol.2016.12.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/06/2016] [Accepted: 12/29/2016] [Indexed: 11/26/2022]
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Khan J, Tahir MZ, Khalid A, Sattar A, Ahmad N. Effect of cholesterol-loaded cyclodextrins on cryosurvival of dog spermatozoa. Reprod Domest Anim 2017; 52 Suppl 2:265-268. [DOI: 10.1111/rda.12893] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J Khan
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
| | - MZ Tahir
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
| | - A Khalid
- Pet Center; University of Veterinary and Animal Sciences; Lahore Pakistan
| | - A Sattar
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
| | - N Ahmad
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
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Wojtusik J, Pennington P, Songsasen N, Padilla LR, Citino SB, Pukazhenthi BS. Pretreatment of Addra gazelle (Nanger dama ruficollis) spermatozoa with cholesterol-loaded cyclodextrins improves cryosurvival. Cryobiology 2016; 73:388-395. [DOI: 10.1016/j.cryobiol.2016.08.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/30/2016] [Accepted: 08/31/2016] [Indexed: 11/30/2022]
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17
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Crichton EG, Malo C, Pukazhenthi BS, Nagy P, Skidmore JA. Evaluation of cholesterol- treated dromedary camel sperm function by heterologous IVF and AI. Anim Reprod Sci 2016; 174:20-28. [PMID: 27622555 DOI: 10.1016/j.anireprosci.2016.08.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 08/13/2016] [Accepted: 08/31/2016] [Indexed: 11/18/2022]
Abstract
Cholesterol (cholesterol-loaded cyclodextrins: CLC) treatment of dromedary camel sperm prior to freezing enhances cryosurvival. The present study first validated the efficacy of a heterologous zona-free goat oocyte assay (n=115 oocytes) to evaluate camel sperm function in vitro (Experiment 1: n=6 bulls), then examined the effects of CLC treatment (1.5mg/mL CLC; CLC+) versus no treatment (0 CLC) of fresh (Experiment 2: n=4 bulls) and frozen-thawed (Experiment 3: n=5 bulls) camel sperm to penetrate, de-condense and form pro-nuclei in in vitro-matured goat oocytes. Finally, the ability of fresh 0 CLC and CLC+ sperm to fertilize in vivo was studied by artificially inseminating super-ovulated females (n=7-9 per treatment) and examining embryo production (Experiment 4: n=4-5 bulls/treatment). Camel spermatozoa penetrated (60%) and formed pro-nuclei (33%) in goat oocytes demonstrating the utility of this heterologous system for assessing sperm function in vitro. For fresh spermatozoa, 0 CLC-treated sperm performed better than their CLC+ counterparts for all parameters measured (P<0.05). In contrast, cryopreservation resulted in a sharp decline in sperm-oocyte interaction in 0 CLC aliquots but remained unaltered in CLC+ aliquots demonstrating a protective effect of cholesterol treatment. There was no difference between treatments in the in vitro fertilizing ability of frozen-thawed sperm or in the numbers of embryos retrieved following AI with fresh 0 CLC or CLC+ sperm. We conclude that although CLC treatment of dromedary camel sperm improves sperm motility it fails to confer an advantage to them in terms of improved in vitro sperm-oocyte interaction or in vivo fertilization under the conditions tested.
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Affiliation(s)
| | - Clara Malo
- Camel Reproduction Centre, PO Box 79914, Dubai, United Arab Emirates
| | - Budhan S Pukazhenthi
- Smithsonian Conservation Biology Institute, Center for Species Survival, Front Royal, VA, USA
| | - Peter Nagy
- Emirates Industries for Camel Milk and Products (EICMP), Dubai, United Arab Emirates
| | - Julian A Skidmore
- Camel Reproduction Centre, PO Box 79914, Dubai, United Arab Emirates
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18
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Fayyaz MH, Ahmad M, Ahmad N. Survival of buffalo bull spermatozoa: effect on structure and function due to alpha-lipoic acid and cholesterol-loaded cyclodextrin. Andrologia 2016; 49. [DOI: 10.1111/and.12652] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2016] [Indexed: 12/18/2022] Open
Affiliation(s)
- M. H. Fayyaz
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
- Arid Zone Research Institute; Pakistan Agricultural Research Council; Bahawalpur Pakistan
| | - M. Ahmad
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
| | - N. Ahmad
- Department of Theriogenology; University of Veterinary and Animal Sciences; Lahore Pakistan
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19
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Pinho R, Lima D, Shiomi H, Siqueira J, Silveira C, Faria V, Lopes P, Guimarães S, Guimarães J. Effect of cyclodextrin-loaded cholesterol conjugates on plasma membrane viability of Piau swine breed frozen/thawed spermatozoa. Cryobiology 2016; 73:1-6. [DOI: 10.1016/j.cryobiol.2016.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 05/21/2016] [Accepted: 07/04/2016] [Indexed: 11/24/2022]
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20
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Salmon VM, Leclerc P, Bailey JL. Cholesterol-Loaded Cyclodextrin Increases the Cholesterol Content of Goat Sperm to Improve Cold and Osmotic Resistance and Maintain Sperm Function after Cryopreservation. Biol Reprod 2016; 94:85. [PMID: 26888968 DOI: 10.1095/biolreprod.115.128553] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 01/28/2016] [Indexed: 11/01/2022] Open
Abstract
The success of semen cryopreservation depends on sperm membrane integrity and function after thawing. Cholesterol-loaded cyclodextrin (CLC) is used for in vitro incorporation of cholesterol to protect cells against cold temperatures. We hypothesized that CLC treatment also enhances sperm cholesterol content to increase tolerance to osmotic shock and cryoresistance, thereby improving fertility. We confirmed the fact that treatment of goat semen with 3 mg/ml CLC increases sperm cholesterol content using both the Liebermann-Burchard approach and filipin III labeling of membrane cholesterol. Sperm were then treated with or without CLC and cryopreserved. After thawing, sperm cholesterol dramatically fell, even in the presence of CLC, which explains the mechanism of cryocapacitation. CLC treatment, however, maintained a normal prefreeze cholesterol level in sperm after cryopreservation. Furthermore, fresh sperm treated with CLC and subjected to either cold shock or incubated in hypo-, iso-, and hyperosmotic media, designed to mimic stresses associated with freezing/thawing, displayed increased temperature and osmotic tolerance. CLC treatment also improved sperm viability, motility, and acrosome integrity after thawing. Furthermore, CLC treatment did not affect the sperm's ability to undergo in vitro capacitation according to chlortetracycline fluorescence and protein tyrosine phosphorylation. A pilot field trial demonstrated that artificial insemination with sperm that underwent increased cholesterol levels following CLC treatment yielded higher fertility ( ITALIC! P< 0.1) and proliferation ( ITALIC! P< 0.05) rates in vivo than untreated semen from the same ejaculate samples. These observations suggest that CLC treatment could be used to improve cryoprotection during the freezing and thawing of goat sperm.
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Affiliation(s)
- Vianney M Salmon
- Centre de Recherche en Biologie de la Reproduction Département des Sciences Animales, Université Laval, Québec, Québec, Canada
| | - Pierre Leclerc
- Département d'Obstétrique et de Gynécologie, Centre de recherche en biologie de la reproduction, Université Laval, Axe reproduction, santé périnatale et santé de l'enfant, Centre de recherche du CHUQ-CHUL, Québec, Québec, Canada
| | - Janice L Bailey
- Centre de Recherche en Biologie de la Reproduction Département des Sciences Animales, Université Laval, Québec, Québec, Canada
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21
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Enriching membrane cholesterol improves stability and cryosurvival of buffalo spermatozoa. Anim Reprod Sci 2016; 164:72-81. [DOI: 10.1016/j.anireprosci.2015.11.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 11/04/2015] [Accepted: 11/14/2015] [Indexed: 11/22/2022]
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22
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Holt WV, Del Valle I, Fazeli A. Heat shock protein A8 stabilizes the bull sperm plasma membrane during cryopreservation: Effects of breed, protein concentration, and mode of use. Theriogenology 2015; 84:693-701. [PMID: 26047707 DOI: 10.1016/j.theriogenology.2015.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 05/03/2015] [Accepted: 05/03/2015] [Indexed: 12/13/2022]
Abstract
Heat shock protein A8 (HSPA8) is a highly conserved member of the Hsp70 family, which is expressed in oviductal cells, translocated into oviductal fluid, and becomes attached to the sperm surface during sperm transport. Previous research has shown that HSPA8 supports mammalian sperm viability during in vitro incubation at both 5 °C and body temperature. The present series of experiments was designed to explore the possibility that bovine recombinant HSPA8 might therefore protect bull spermatozoa during cryopreservation through its beneficial effects on the sperm plasma membrane. Soy-based cryopreservation media were used in these experiments. The effects of HSPA8 addition before freezing were examined at concentrations ranging from 0.2 to 6.4 μg/mL, whereas the effects of postthaw HSPA8 addition were tested between 0.2 and 12.8 μg/mL. When bull spermatozoa (from beef and dairy breeds) were frozen in the presence of HSPA8, beneficial but complex effects on postthaw viability were observed. Low HSPA8 concentrations (0.2 and 0.4 μg/mL) resulted in significantly reduced postthaw sperm viability, but concentrations above 0.8 μg/mL improved plasma membrane integrity. If HSPA8 was added to spermatozoa after thawing, outcomes were also biphasic and beneficial effects on viability were only seen if the HSPA8 concentration exceeded 3.2 μg/mL. Beneficial effects were significantly more apparent with beef rather than dairy breeds. When HSPA8 was used in combination with cholesterol-loaded cyclodextrin, spermatozoa from the beef breeds showed significantly lower apoptotic effects. This was not observed with the dairy breeds.
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Affiliation(s)
- W V Holt
- Department of Human Metabolism, Academic Unit of Reproductive and Developmental Medicine, Sheffield, UK.
| | - I Del Valle
- Department of Human Metabolism, Academic Unit of Reproductive and Developmental Medicine, Sheffield, UK
| | - A Fazeli
- Department of Human Metabolism, Academic Unit of Reproductive and Developmental Medicine, Sheffield, UK
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Abstract
Cell membranes can be modified using cyclodextrins loaded with lipids or unilamellar liposomes. Lipid choice can greatly influence the organization of the targeted membrane and result in a cell that is more capable of surviving cryopreservation due to altered membrane-phase transition properties or membrane reorganization that may alter the normal physiologic processes of the treated cell. The protocols described here explain the preparation of the cyclodextrins and liposomes, impact of the amount and type of lipids, and general principles for treating cells using either of these technologies.
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Cholesterol addition aids the cryopreservation of dromedary camel (Camelus dromedarius) spermatozoa. Theriogenology 2015; 83:168-74. [DOI: 10.1016/j.theriogenology.2014.09.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 09/03/2014] [Accepted: 09/08/2014] [Indexed: 11/21/2022]
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25
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Almadaly E, Hoshino Y, Ueta T, Mukoujima K, Shukry M, Farrag F, El-Kon I, Kita K, Murase T. Desalted and lyophilized bovine seminal plasma delays induction of the acrosome reaction in frozen-thawed bovine spermatozoa in response to calcium ionophore. Theriogenology 2015; 83:175-85. [DOI: 10.1016/j.theriogenology.2014.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 09/04/2014] [Accepted: 09/08/2014] [Indexed: 11/16/2022]
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26
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Oliveira RR, Rates DM, Pugliesi G, Ker PG, Arruda RP, Moraes EA, Carvalho GR. Use of cholesterol-loaded cyclodextrin in donkey semen cryopreservation improves sperm viability but results in low fertility in mares. Reprod Domest Anim 2014; 49:845-50. [PMID: 25124746 DOI: 10.1111/rda.12379] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 06/19/2014] [Indexed: 11/27/2022]
Abstract
The use of cholesterol-loaded cyclodextrin (CLC) on semen cryopreservation has been related with better sperm viability in several species; however, the effect on fertility is not known in donkey semen. Ejaculates (n = 25) from five donkeys were diluted in S-MEDIUM with 0, 1, 2 or 3 mg of CLC/120 × 10(6) spermatozoa. Semen was frozen, and thawed samples were evaluated by computer-assisted sperm analyser system (CASA), supravital test, hyposmotic swelling test and fluorescent dyes to assess the integrity of sperm membranes. Mares (n = 60) were inseminated with frozen-thawed semen treated with the doses of 0 or 1 mg CLC. Percentages of sperm with progressive motility and with functional plasma membrane were greater (p < 0.05) in the CLC-treated groups than in the control. Percentages of intact plasma membrane and intact plasma membrane and acrosome detected by fluorescent dyes were also greater (p < 0.05) in CLC-treated groups. Although no difference (p > 0.05) in conception rates was detected between groups (control, 3/30, 10%; CLC-treated, 1/30, 3.3%), fertility was low for artificial insemination programs in mares. Therefore, we firstly demonstrated that frozen semen treated with CLC in S-MEDIA extender before freezing improves the in vitro sperm viability, but semen treated or not with CLC in S-MEDIUM extender results in a very low conception rate in mares inseminated with thawed donkey semen.
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Affiliation(s)
- R R Oliveira
- Department of Animal Science, Federal University of Viçosa, Viçosa, MG, Brazil
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27
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Konyali C, Tomás C, Blanch E, Gómez E, Graham J, Mocé E. Optimizing conditions for treating goat semen with cholesterol-loaded cyclodextrins prior to freezing to improve cryosurvival. Cryobiology 2013; 67:124-31. [DOI: 10.1016/j.cryobiol.2013.06.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 05/10/2013] [Accepted: 06/03/2013] [Indexed: 11/25/2022]
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28
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Srivastava N, Srivastava SK, Ghosh SK, Kumar A, Perumal P, Jerome A. Acrosome membrane integrity and cryocapacitation are related to cholesterol content of bull spermatozoa. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2013. [DOI: 10.1016/s2305-0500(13)60132-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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29
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Kiso WK, Asano A, Travis AJ, Schmitt DL, Brown JL, Pukazhenthi BS. Pretreatment of Asian elephant (Elephas maximus) spermatozoa with cholesterol-loaded cyclodextrins and glycerol addition at 4°C improves cryosurvival. Reprod Fertil Dev 2013; 24:1134-42. [PMID: 22954260 DOI: 10.1071/rd11266] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Accepted: 04/04/2012] [Indexed: 11/23/2022] Open
Abstract
Asian elephant spermatozoa are sensitive to chilling and do not respond well to cryopreservation. The objectives of the present study were to: (1) determine whether cholesterol content can be modified by preincubation of Asian elephant spermatozoa with cholesterol-loaded cyclodextrin (CLC); and (2) assess the effects of CLC concentration(s), temperature at time of glycerol addition (22°C vs 4°C) and dilution medium on post-thaw sperm survival. Spermatozoa incubated with ≥1.5 mg CLC exhibited increased (P < 0.05) cholesterol concentrations. Pretreatment of spermatozoa with 1.5 mg CLC resulted in improvements (P < 0.05) in all post-thaw parameters. Glycerol addition at 4°C also improved all post-thaw parameters compared with 22°C. Dilution of thawed spermatozoa in an egg yolk-based medium improved (P < 0.05) motility compared with Ham's F-10 culture medium. In summary, our findings indicate that modifying cholesterol content within the plasma membrane improves the cryosurvival of Asian elephant spermatozoa. The development of an improved cryopreservation method that includes modification of membrane cholesterol and the addition of glycerol at 4°C, as reported in the present study, is an important step towards utilisation of cryopreserved spermatozoa in captive management of this species.
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Affiliation(s)
- Wendy K Kiso
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, DC 20008, USA.
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30
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Benson JD, Woods EJ, Walters EM, Critser JK. The cryobiology of spermatozoa. Theriogenology 2013; 78:1682-99. [PMID: 23062722 DOI: 10.1016/j.theriogenology.2012.06.007] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 05/17/2012] [Accepted: 05/25/2012] [Indexed: 12/11/2022]
Abstract
The impact of successful cryopreservation of spermatozoa can be found in many fields, including agriculture, laboratory animal medicine, and human assisted reproduction, providing a cost-effective and efficient method to preserve genetic material for decades. The success of any cryobiologic protocol depends critically on understanding the fundamentals that underlie the process. In this review, we summarize the biophysical fundamentals critical to much of the research in sperm cryobiology, provide a synopsis of the development of sperm cryobiology as a discipline, and present the current state and directions for future research in sperm cryobiology in the three major areas outlined above-agriculture, laboratory animal medicine, and human clinical assisted reproduction. There is much room for new research, both empiric and fundamental, in all areas, including refinement of mathematical models, optimization of cryoprotective agent addition and removal procedures for spermatozoa from many species, development of effective, efficient, and facile cryopreservation protocols and freezing containers for agricultural sperm cryopreservation, and tailoring cryopreservation protocols for individual human samples.
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Affiliation(s)
- J D Benson
- Department of Mathematics, Northern Illinois University, DeKalb, Illinois, USA.
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31
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Santos M, Sansinena M, Zaritzky N, Chirife J. Mathematical prediction of freezing times of bovine semen in straws placed in static vapor over liquid nitrogen. Cryobiology 2013; 66:30-7. [DOI: 10.1016/j.cryobiol.2012.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 09/26/2012] [Accepted: 10/01/2012] [Indexed: 11/26/2022]
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32
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Effect of the exposure to methyl-β-cyclodextrin prior to chilling or vitrification on the viability of bovine immature oocytes. Cryobiology 2012; 65:319-25. [DOI: 10.1016/j.cryobiol.2012.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 08/27/2012] [Accepted: 09/04/2012] [Indexed: 11/21/2022]
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33
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Towhidi A, Parks JE. Effect of n-3 fatty acids and α-tocopherol on post-thaw parameters and fatty acid composition of bovine sperm. J Assist Reprod Genet 2012; 29:1051-6. [PMID: 22869241 DOI: 10.1007/s10815-012-9834-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 07/13/2012] [Indexed: 10/28/2022] Open
Abstract
PURPOSE This study was designed to determine the combined effects of adding source of n-3 fatty acids (FA) and α-tocopherol (vitamin E, VE) to semen extender on freezability and FA composition of Brown Swiss bull sperm. METHODS Semen samples were collected from 6 Brown Swiss bulls and pooled. In the first trial, semen was divided into 12 groups including 4 levels of n-3 FA (0, 1, 10, 100 ng ml(-1)) and 3 levels of VE (0. 0.2, 0.4 mM). Motility, viability and fatty acid composition of sperm were measured. RESULTS The treatment of 10 ng ml(-1) n-3 FA and 0.4 mM VE had the best post-thaw sperm characteristics (P < 0.01). In the second trial, sperm lipid composition of this treatment and control (without FA and VE) was determined. Supplementing n-3 fatty acids during cryopreservation increased docosahexaenoic acid (DHA) and the ratio of n-3 to n-6 FA in sperm before freezing and after thawing. CONCLUSIONS The results suggest that combining the optimal level of n-3 FA (10 ng ml(-1)) with the highest level of VE tested (0.4 mM) in a semen extender changed the membrane lipid composition and improved freezablity of Brown Swiss bull sperm.
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Affiliation(s)
- A Towhidi
- Department of Animal Science, Faculty of Agricultural Science and Engineering, University of Tehran, POBox# 4111, Karaj, Iran.
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Kruse R, Dutta PC, Morrell JM. Colloid centrifugation removes seminal plasma and cholesterol from boar spermatozoa. Reprod Fertil Dev 2012; 23:858-65. [PMID: 21871205 DOI: 10.1071/rd10260] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 03/28/2011] [Indexed: 11/23/2022] Open
Abstract
The objective of the present study was to investigate the effect of Single-Layer Centrifugation (SLC) on boar spermatozoa, namely the effect of removal of seminal plasma proteins and cholesterol from the surface of spermatozoa. The presence of porcine seminal plasma proteins I and II (PSP-I/PSP-II) before and after SLC was studied using immunofluorescence, whereas the removal of cholesterol was shown qualitatively by thin-layer chromatography (TLC). Finally, the integrity of the sperm plasma membrane was observed by electron microscopy. It was shown that the seminal plasma proteins PSP-I and -II were removed from spermatozoa during SLC but could be restored by adding seminal plasma to the SLC-selected sperm samples. Some cholesterol was also lost from the spermatozoa during SLC but the plasma membrane itself appeared to be morphologically intact. Further studies are underway to examine the relevance of these findings to boar sperm cryopreservation and sperm fertility.
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Affiliation(s)
- R Kruse
- Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
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35
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Treating boar sperm with cholesterol-loaded cyclodextrins widens the sperm osmotic tolerance limits and enhances the in vitro sperm fertilising ability. Anim Reprod Sci 2011; 129:209-20. [DOI: 10.1016/j.anireprosci.2011.12.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 11/24/2011] [Accepted: 12/03/2011] [Indexed: 11/21/2022]
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36
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Awad M. Effects of sub-optimal glycerol concentration and cholesterol-loaded cyclodextrin in a Tris-based diluent on cryopreserved ram sperm longevity and acrosomal integrity. Small Rumin Res 2011. [DOI: 10.1016/j.smallrumres.2011.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Nasiri AH, Towhidi A, Zeinoaldini S. Combined effect of DHA and α-tocopherol supplementation during bull semen cryopreservation on sperm characteristics and fatty acid composition. Andrologia 2011; 44 Suppl 1:550-5. [DOI: 10.1111/j.1439-0272.2011.01225.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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38
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Effects of cholesterol-loaded cyclodextrin during freezing step of cryopreservation with TCGY extender containing bovine serum albumin on quality of goat spermatozoa. Cryobiology 2010; 61:94-9. [DOI: 10.1016/j.cryobiol.2010.05.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2009] [Revised: 05/27/2010] [Accepted: 05/28/2010] [Indexed: 11/24/2022]
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39
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Mocé E, Blanch E, Tomás C, Graham JK. Use of Cholesterol in Sperm Cryopreservation: Present Moment and Perspectives to Future. Reprod Domest Anim 2010; 45 Suppl 2:57-66. [DOI: 10.1111/j.1439-0531.2010.01635.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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