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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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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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53
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Benhenia K, Lamara A, Fatmi S, Iguer-Ouada M. Effect of cyclodextrins, cholesterol and vitamin E and their complexation on cryopreserved epididymal ram semen. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2016.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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54
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Abstract
This study was conducted to determine the changes in chicken sperm plasma membranes fluidity and polarity as lipid packing arrangement induced by cholesterol-loaded cyclodextrin (CLC) and 2-hydroxypropyl-β-cyclodextrin (HBCD) and how sperm cryopreservation outcomes are improved by these changes. Treatment with 2 mg HBCD supported the highest (P < 0.01) percentage of viable spermatozoa compared with the control and CLCs groups after cryopreservation. The percentage of post-thaw progressive and rapid sperm motility was highest in 2 mg HBCD (P < 0.01). After thawing, sperm treated with 1 or 2 mg CLC showed the highest anisotropy at 5, 21, 25 and 40°C (P < 0.01). At 25°C, the lowest anisotropy was observed in the thawed semen from the control group. The highest value (P < 0.01) of generalized polarization (GP) (0.5) at 5°C was observed in the 1 mg CLC treated sample. After 2 h of incubation, the highest percentage of viable spermatozoa was observed in the HBCD group in relation to the other treatments (P < 0.01). Exposure to 1 mg or 2 mg of CLC significantly decreased the percentage of live spermatozoa after thawing (P < 0.01). In conclusion, HBCD appears to play a role in the modification of sperm membranes, increasing their fluidity and preventing them against membrane phase transition to gel, thus minimizing freezing-thaw sperm damage. HBCD treatment enhances chicken sperm viability and motility after cryopreservation and subsequent storage. This novel procedure may be useful for improving the technology for cryopreservation of fowl spermatozoa.
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55
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Uçan U, Küçük N, Ahmad E, Naseer Z, Aksoy M, Serin İ, Ceylan A. Effect of different sugars supplemented to the extender in combination with cholesterol-loaded cyclodextrin (CLC) on post-thaw quality of ram spermatozoa. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2016.01.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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56
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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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57
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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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58
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Behera S, Harshan HM, Bhai KL, Ghosh KNA. Effect of cholesterol supplementation on cryosurvival of goat spermatozoa. Vet World 2015; 8:1386-91. [PMID: 27047048 PMCID: PMC4774814 DOI: 10.14202/vetworld.2015.1386-1391] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 10/24/2015] [Accepted: 10/31/2015] [Indexed: 12/02/2022] Open
Abstract
Aim: Sperm membrane cholesterol influences cryodamage during cryopreservation. The present study was carried out to evaluate the effect of varying cholesterol levels in Tris based extenders on the freezability of sexually healthy Malabari buck semen. Materials and Methods: A total of 48 ejaculates from two adults healthy sexually healthy Malabari bucks were utilized for the study. The collected and pooled ejaculates were divided into four groups with Group I serving as Control - I, Group II and III were treated with 1 mg and 2 mg of cholesterol-loaded-cyclodextrin (CLC)/120 × 106 spermatozoa, respectively, and Group IV, treated with 1 mg methyl-β-cyclodextrin (MβCD) served as Control - II. Manual freezing was carried out to cryopreserve the treated and control spermatozoa. Results: Treatment of semen samples with CLC resulted in improved maintenance of sperm motility at pre-freeze and post-thaw stages of cryopreservation without affecting hypo-osmotic swelling response. Treatment of semen with 1 mg of CLC/120 × 106 spermatozoa was observed to be better than treatment with 2 mg of CLC/120 × 106 spermatozoa. In general, MβCD treatment was found to result in significantly lower sperm characteristics than those of Control - I and CLC treatment at pre-feeze and post-thaw stages and when incubated up to 4 h. Conclusion: Cholesterol treatment of sexually healthy Malabari buck semen was found to hold promise for improving cryopreservability of spermatozoa.
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Affiliation(s)
- Sunita Behera
- Department of Veterinary Gynaecology and Obstetrics, Veterinary College, Bengaluru, Karnataka, India
| | - Hiron M Harshan
- Department of Animal Reproduction Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode, Kerala, India
| | - K Lekshmi Bhai
- Department of Animal Reproduction Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode, Kerala, India
| | - K N Aravinda Ghosh
- Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
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59
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Blommaert D, Franck T, Donnay I, Lejeune JP, Detilleux J, Serteyn D. Substitution of egg yolk by a cyclodextrin-cholesterol complex allows a reduction of the glycerol concentration into the freezing medium of equine sperm. Cryobiology 2015; 72:27-32. [PMID: 26687387 DOI: 10.1016/j.cryobiol.2015.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/08/2015] [Accepted: 11/27/2015] [Indexed: 11/27/2022]
Abstract
The aim of this work was to completely replace the egg yolk a classical diluent for freezing equine semen by a cyclodextrin-cholesterol complex. At the same time, the reduction in the glycerol content used for cryopreservation and the incubation time between sperm and the freezing media were evaluated. Horse ejaculates were frozen with four different freezing extenders: a frozen reference medium (IF) containing egg yolk and 2.5% glycerol and media without egg yolk but supplemented with 1.5 mg 2-hydroxypropyl-beta-cyclodextrin cholesterol (HPβCD-C) complex and containing either 1% (G1), 2% (G2) or 3% glycerol (G3). Three incubation times (90, 120 and 180 min) at 4 °C between the fresh semen and the different media were tested before freezing. Viability and motility analyses were performed with computer assisted semen analysis (CASA). Results showed that the freezing media containing the HPβCD-C complex with 1%, 2% and 3% glycerol significantly improve the 3 in vitro parameters of post thawing semen quality (viability, progressive and total mobilities) compared to IF. The best improvement of the parameters was obtained with G1 medium and the longest contact time. The substitution of egg yolk by HPβCD-C complex allows the decrease of protein charge of the medium while favouring the cholesterol supply to membrane spermatozoa offering it a better resistance to osmotic imbalance and a better tolerance to the glycerol toxicity. Our results highlight that the egg yolk of an extender for the freezing of horse semen can be completely substituted by HPβCD-C complex.
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Affiliation(s)
| | - Thierry Franck
- Center for Oxygen Research and Development (CORD), University of Liège, Liège, Belgium
| | - Isabelle Donnay
- Institut des Sciences de la Vie, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | | | - Johann Detilleux
- Department of Quantitative Genetics, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Didier Serteyn
- LINALUX-MLS, Centre Européen du Cheval, Vielsalm, Belgium; Center for Oxygen Research and Development (CORD), University of Liège, Liège, Belgium; Equine Clinic, Veterinary Medicine Faculty, University of Liège, Liège, Belgium
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60
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Protective effect of cholesterol-loaded cyclodextrin pretreatment against hydrogen peroxide induced oxidative damage in ram sperm. Cryobiology 2015; 71:18-23. [DOI: 10.1016/j.cryobiol.2015.06.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 05/28/2015] [Accepted: 06/18/2015] [Indexed: 11/20/2022]
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61
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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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62
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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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63
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Vecsernyés M, Fenyvesi F, Bácskay I, Deli MA, Szente L, Fenyvesi É. Cyclodextrins, blood-brain barrier, and treatment of neurological diseases. Arch Med Res 2014; 45:711-29. [PMID: 25482528 DOI: 10.1016/j.arcmed.2014.11.020] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 11/24/2014] [Indexed: 12/20/2022]
Abstract
Biological barriers are the main defense systems of the homeostasis of the organism and protected organs. The blood-brain barrier (BBB), formed by the endothelial cells of brain capillaries, not only provides nutrients and protection to the central nervous system but also restricts the entry of drugs, emphasizing its importance in the treatment of neurological diseases. Cyclodextrins are increasingly used in human pharmacotherapy. Due to their favorable profile to form hydrophilic inclusion complexes with poorly soluble active pharmaceutical ingredients, they are present as excipients in many marketed drugs. Application of cyclodextrins is widespread in formulations for oral, parenteral, nasal, pulmonary, and skin delivery of drugs. Experimental and clinical data suggest that cyclodextrins can be used not only as excipients for centrally acting marketed drugs like antiepileptics, but also as active pharmaceutical ingredients to treat neurological diseases. Hydroxypropyl-β-cyclodextrin received orphan drug designation for the treatment of Niemann-Pick type C disease. In addition to this rare lysosomal storage disease with neurological symptoms, experimental research revealed the potential therapeutic use of cyclodextrins and cyclodextrin nanoparticles in neurodegenerative diseases, stroke, neuroinfections and brain tumors. In this context, the biological effects of cyclodextrins, their interaction with plasma membranes and extraction of different lipids are highly relevant at the level of the BBB.
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Affiliation(s)
- Miklós Vecsernyés
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary.
| | - Ferenc Fenyvesi
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary
| | - Ildikó Bácskay
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary
| | - Mária A Deli
- Department of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Lajos Szente
- Cyclolab Cyclodextrin Research and Development Laboratory Ltd., Budapest, Hungary
| | - Éva Fenyvesi
- Cyclolab Cyclodextrin Research and Development Laboratory Ltd., Budapest, Hungary
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64
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Rajoriya JS, Prasad JK, Ghosh SK, Ramteke SS, Barik NC, Das GK, Pande M. Cholesterol loaded cyclodextrin increases freezability of buffalo bull (Bubalus bubalis) spermatozoa by increasing cholesterol to phospholipid ratio. Vet World 2014. [DOI: 10.14202/vetworld.2014.702-706] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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65
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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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66
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Johnson AEM, Freeman EW, Wildt DE, Songsasen N. Spermatozoa from the maned wolf (Chrysocyon brachyurus) display typical canid hyper-sensitivity to osmotic and freezing-induced injury, but respond favorably to dimethyl sulfoxide. Cryobiology 2014; 68:361-70. [PMID: 24731851 DOI: 10.1016/j.cryobiol.2014.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 04/04/2014] [Accepted: 04/07/2014] [Indexed: 10/25/2022]
Abstract
We assessed the influences of medium osmolality, cryoprotectant and cooling and warming rate on maned wolf (Chrysocyon brachyurus) spermatozoa. Ejaculates were exposed to Ham's F10 medium (isotonic control) or to this medium plus NaCl (350-1000mOsm), sucrose (369 and 479mOsm), 1M glycerol (1086mOsm) or dimethyl sulfoxide (Me2SO, 1151mOsm) for 10 min. Each sample then was diluted back into Ham's medium and assessed for sperm motility and plasma membrane integrity. Although glycerol and Me2SO had no influence (P>0.05), NaCl and sucrose solutions affected sperm motility (P<0.05), but not membrane integrity. Motility of sperm exposed to <600mOsm NaCl or sucrose was less (P<0.05) than fresh ejaculate, but comparable (P>0.05) to the control. As osmolality of the NaCl solution increased, motility decreased to <5%. In a separate study, ejaculates were diluted in Test Yolk Buffer containing 1M glycerol or Me2SO and cooled from 5°C to -120°C at -57.8°C, -124.2°C or -67.0°C/min, frozen in LN2, thawed in a water bath for 30s at 37°C or 10s at 50°C, and then assessed for motility, plasma- and acrosomal membrane integrity. Cryopreservation markedly (P<0.05) reduced sperm motility by 70% compared to fresh samples. Higher (P<0.05) post-thaw motility (20.0±1.9% versus 13.5±2.1%) and membrane integrity (51.2±1.7% versus 41.5±2.2%) were observed in samples cryopreserved in Me2SO than in glycerol. Cooling rates influenced survival of sperm cryopreserved in glycerol with -57.8°C/min being advantageous (P<0.05). The findings demonstrate that although maned wolf spermatozoa are similar to domestic dog sperm in their sensitivity to osmotic-induced motility damage, the plasma membranes tolerate dehydration, and the cells respond favorably to Me2SO as a cryoprotectant.
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Affiliation(s)
- Amy E M Johnson
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA; Department of Environmental Science and Policy, George Mason University, Fairfax, VA, USA
| | | | - David E Wildt
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA
| | - Nucharin Songsasen
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, USA.
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67
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Blanch E, Tomás C, Hernández M, Roca J, Martínez EA, Vázquez JM, Mocé E. Egg yolk and glycerol requirements for freezing boar spermatozoa treated with methyl β-cyclodextrin or cholesterol-loaded cyclodextrin. J Reprod Dev 2014; 60:143-9. [PMID: 24492655 PMCID: PMC3999393 DOI: 10.1262/jrd.2013-073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Egg yolk (EY) and glycerol are common constituents of extenders used for sperm
cryopreservation. It has been demonstrated that using cholesterol-loaded cyclodextrins
(CLC) improves sperm cryosurvival in several species. However, standard freezing extenders
might not be the most appropriate for CLC-treated sperm. This study evaluated the EY and
glycerol requirements for freezing CLC-treated boar spermatozoa. Semen samples from 34
ejaculates coming from 4 boars were used. Each ejaculate was split into three aliquots:
one was used untreated (control), and the other two were treated with 1 mg of CLC or
methyl-β-cyclodextrin/120 × 106 sperm for 15 min at 22 C prior to
cryopreservation. Our results indicated that reducing the concentration of EY was
detrimental for sperm viability after thawing (31.57 ± 2 vs. 19.89% ± 2
for 20 and 10% EY, respectively; P <0.05), even in semen treated with CLC. On the other
hand, it was observed that the traditional concentration of glycerol (3%) was not the
appropriate for freezing CLC-treated sperm (61.10 ± 3 vs. 47.87% ± 3 viable sperm for
control and CLC-treated sperm, respectively; P <0.05). Thus, CLC-treated sperm showed a
higher tolerance to high glycerol concentrations (5%) in terms of sperm viability (59.19%
± 3) than non-treated sperm (45.58% ± 3; P<0.05). Therefore, it could be necessary to
modify the freezing extenders for CLC-treated sperm. Nevertheless, additional studies will
be needed to evaluate alternative cryoprotectants and to determine the effect of high
glycerol concentrations on sperm functionality.
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Affiliation(s)
- Eva Blanch
- Centro de Tecnología Animal - Instituto Valenciano de Investigaciones Agrarias (CITA-IVIA), 12400-Segorbe (Castellón), Spain
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68
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Cholesterol-loaded cyclodextrin pretreatment of ram spermatozoa protects structural integrity of plasma membrane during osmotic challenge and reduces their ability to undergo acrosome reaction in vitro. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2013.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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69
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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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70
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Motamedi-Mojdehi R, Roostaei-Ali Mehr M, Rajabi-Toustani R. Effect of different levels of glycerol and cholesterol-loaded cyclodextrin on cryosurvival of ram spermatozoa. Reprod Domest Anim 2013; 49:65-70. [PMID: 23931733 DOI: 10.1111/rda.12225] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 07/09/2013] [Indexed: 11/29/2022]
Abstract
This study was conducted to determine the optimum level of glycerol and cholesterol-loaded cyclodextrin (CLC) in a Tris-based diluent for cryopreservation of ram spermatozoa. Ram semen was treated with 0, 1.5, 3 or 4.5 mg CLC/120 × 10(6) cells in Tris-based diluents containing 3, 5 or 7% glycerol in a factorial arrangement 3 × 4 and frozen in liquid nitrogen vapour. Sperm motility, viability (eosin-nigrosin staining) and functional membrane integrity (hypo-osmotic swelling test) were assessed immediately after thawing (0 h) and subsequently after 3 and 6 h at 37°C. There was an interaction between CLC and glycerol on the functional membrane integrity (p < 0.05). In the presence of 3% glycerol, the highest functional membrane integrity (32.2%) was found in the spermatozoa treated with 1.5 mg CLC/120 × 10(6) sperm. Post-thaw sperm motility was highest in 1.5 mg CLC immediately after thawing (40.5%) and after 3-h (30.6%) incubation at 37°C (p < 0.05). Viability of spermatozoa was higher in all CLC treatments than in the untreated samples, and it was highest (33.9%) in the spermatozoa treated with 1.5 mg CLC (p < 0.05). These data indicate that the addition of cholesterol to sperm membranes by 1.5 mg CLC/120 × 10(6) cells may allow the use of a lower concentration of glycerol (3%), which is sufficient to mitigate the detrimental effects of freezing and thawing.
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Affiliation(s)
- R Motamedi-Mojdehi
- Department of Animal Science, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
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71
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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: 16] [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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72
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Forouzanfar M, Fekri Ershad S, Hosseini SM, Hajian M, Ostad-Hosseini S, Abid A, Tavalaee M, Shahverdi A, Vosough Dizaji A, Nasr Esfahani MH. Can permeable super oxide dismutase mimetic agents improve the quality of frozen–thawed ram semen? Cryobiology 2013; 66:126-30. [DOI: 10.1016/j.cryobiol.2012.12.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 12/12/2012] [Accepted: 12/13/2012] [Indexed: 12/28/2022]
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73
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Tomás C, Blanch E, Fazeli A, Mocé E. Effect of a pre-freezing treatment with cholesterol-loaded cyclodextrins on boar sperm longevity, capacitation dynamics, ability to adhere to porcine oviductal epithelial cells in vitro and DNA fragmentation dynamics. Reprod Fertil Dev 2013; 25:935-46. [DOI: 10.1071/rd12079] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 08/23/2012] [Indexed: 11/23/2022] Open
Abstract
The aim of this work was to examine how a pre-freezing treatment with cholesterol-loaded cyclodextrins (CLC) affects boar sperm longevity, capacitation dynamics, ability to bind to a porcine telomerase-immortalised oviductal epithelial cell line (TERT-OPEC) in vitro and DNA integrity dynamics after freeze–thawing. Although the samples treated with CLC exhibited lower sperm quality than the control samples (P < 0.05) immediately after thawing, these differences disappeared (P > 0.05) after long-term incubation (26 h at 37 or 16°C). Additionally, the CLC-treated spermatozoa underwent similar capacitation and DNA fragmentation dynamics as the control spermatozoa (P > 0.05). However, CLC-treated spermatozoa were better able to bind to TERT-OPEC in vitro (P < 0.0001). In conclusion, the pre-freezing treatment of boar spermatozoa with CLC enhanced the ability of the spermatozoa to bind to TERT-OPEC in vitro, which could have an effect on the establishment of the sperm reservoir in the ampullary–isthmic junction in vivo. Additionally, frozen–thawed spermatozoa can be stored at 16°C for at least 6 h without a significant observable decline in sperm quality, which could be beneficial for the transport of thawed diluted doses of spermatozoa from the laboratory to the farm.
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74
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Tapia JA, Macias-Garcia B, Miro-Moran A, Ortega-Ferrusola C, Salido GM, Peña FJ, Aparicio IM. The Membrane of the Mammalian Spermatozoa: Much More Than an Inert Envelope. Reprod Domest Anim 2012; 47 Suppl 3:65-75. [DOI: 10.1111/j.1439-0531.2012.02046.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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75
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Abstract
This review brings together research findings on cervical relaxation in the ewe and its pharmacological stimulation for enhancement of the penetration needed for transcervical insemination and embryo transfer. On the basis that the success of artificial insemination is the percentage of ewes lambing, a review is made of recent research aimed at understanding and minimising the sub-lethal effects of freezing and thawing on the viability of spermatozoa, their membrane integrity and their ability to migrate through cervical mucus, as these characteristics have a major influence on fertility, particularly when semen is deposited, artificially, in the os cervix. Milestones of achievement are given for transcervical intrauterine insemination, embryo recovery and transfer and the birth of lambs of pre-determined sex, firstly following intracytoplasmic sperm injection, then laparoscopic intrauterine insemination using highly diluted flow-cytometrically sorted fresh semen and subsequently by os cervix insemination using sexed semen that had been frozen and thawed. Diversity of research endeavour (applied, cellular, molecular), research discipline (anatomy, histology, immunology, endocrinology) and research focus (cell, tissue, organ, whole animal) is embraced within the review as each has significant contributions to make in advancing recent scientific findings from the laboratory into robust on-farm transcervical insemination and embryo transfer techniques.
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76
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Martínez-Páramo S, Diogo P, Dinis MT, Herráez MP, Sarasquete C, Cabrita E. Sea bass sperm freezability is influenced by motility variables and membrane lipid composition but not by membrane integrity and lipid peroxidation. Anim Reprod Sci 2012; 131:211-8. [PMID: 22503480 DOI: 10.1016/j.anireprosci.2012.03.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 03/09/2012] [Accepted: 03/14/2012] [Indexed: 12/23/2022]
Abstract
Cryopreserved sperm quality depends on the characteristics of fresh sperm. Thus, it is necessary to establish a group of variables to predict the cryopreservation potential of the fresh samples with the aim of optimizing resources. Motility, viability, lipid peroxidation and lipid profile of European sea bass (Dicentrarchus labrax) sperm were determined before and after cryopreservation to establish which variables more accurately predict the sperm cryopreservation potential in this species. Cryopreservation compromised sperm quality, expressed as a reduction of motility (46.5 ± 2.0% to 35.3 ± 2.5%; P<0.01) and viability (91.3 ± 0.7% to 69.9 ± 1.6%; P<0.01), and produced an increase in lipid peroxidation (2.4 ± 0.4 to 4.0 ± 0.4 μmoles MDA/mill spz; P<0.01). Also, significant changes were observed in the lipid composition before and after freezing, resulting in a reduction in the cholesterol/phospholipids ratio (1.4 ± 0.1 to 1.1 ± 0.0; P<0.01), phosphatidylcholine (47.7 ± 0.8% to 44.2 ± 0.8%; P<0.01) and oleic acid (8.7 ± 0.2% to 8.3 ± 0.2%; P<0.05) in cryopreserved sperm, as well as an increase in lysophosphatidylcholine (4.4 ± 0.3% to 4.8 ± 0.3%; P<0.01) and C24:1n9 fatty acid (0.5 ± 0.1% to 0.6 ± 0.1%; P<0.05). Motility, velocity, cholesterol/phospholipids ratio, monounsaturated fatty acids and the n3/n6 ratio were positively correlated (P<0.05) before and after freezing, whereas, viability and lipid peroxidation were not correlated. Motility and the cholesterol/phospholipids (CHO/PL) ratio were negatively correlated (P<0.05) with each other and the CHO/PL ratio was positively correlated (P<0.05) with lipid peroxidation. Therefore, the results demonstrated that motility and plasma membrane lipid composition (CHO/PL) were the most desirable variables determined in fresh samples to predict cryo-resistance in European sea bass sperm, taking into account the effect of both on cryopreserved sperm quality.
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Affiliation(s)
- S Martínez-Páramo
- CCMAR-Center for Marine Science, University of Algarve, Faro, Portugal.
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77
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Blanch E, Tomás C, Graham JK, Mocé E. Response of Boar Sperm to the Treatment with Cholesterol-Loaded Cyclodextrins Added Prior to Cryopreservation. Reprod Domest Anim 2012; 47:959-64. [DOI: 10.1111/j.1439-0531.2012.01999.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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78
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Leahy T, Gadella BM. Sperm surface changes and physiological consequences induced by sperm handling and storage. Reproduction 2011; 142:759-78. [DOI: 10.1530/rep-11-0310] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Spermatozoa interact with their immediate environment and this contact remodels the sperm surface in preparation for fertilisation. These fundamental membrane changes will be critically covered in this review with special emphasis on the very specific surface destabilisation event, capacitation. This process involves very subtle and intricate modifications of the sperm membrane including removal of suppression (decapacitation) factors and changes in the lateral organisation of the proteins and lipids of the sperm surface. Processing of sperm for assisted reproduction (storage, sex-sorting, etc.) subjects spermatozoa to numerous stressors, and it is possible that this processing overrides such delicate processes resulting in sperm instability and cell damage. To improve sperm quality, novel mechanisms must be used to stabilise the sperm surface during handling. In this review, different types of membrane stress are considered, as well as novel surface manipulation methods to improve sperm stability.
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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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80
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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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81
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Am-in N, Kirkwood R, Techakumphu M, Tantasuparuk W. Lipid profiles of sperm and seminal plasma from boars having normal or low sperm motility. Theriogenology 2011; 75:897-903. [DOI: 10.1016/j.theriogenology.2010.10.032] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 10/20/2010] [Accepted: 10/23/2010] [Indexed: 10/18/2022]
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82
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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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83
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Purdy PH, Mocé E, Stobart R, Murdoch WJ, Moss GE, Larson B, Ramsey S, Graham JK, Blackburn HD. The fertility of ram sperm held for 24h at 5°C prior to cryopreservation. Anim Reprod Sci 2010; 118:231-5. [DOI: 10.1016/j.anireprosci.2009.06.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Revised: 05/18/2009] [Accepted: 06/18/2009] [Indexed: 10/20/2022]
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