1
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Klbik I. Is post-hypertonic lysis of human red blood cells caused by excessive cell volume regulation? Cryobiology 2024; 114:104795. [PMID: 37984597 DOI: 10.1016/j.cryobiol.2023.104795] [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: 05/10/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/22/2023]
Abstract
Human red blood cells (RBC) exposed to hypertonic media are subject to post-hypertonic lysis - an injury that only develops during resuspension to an isotonic medium. The nature of post-hypertonic lysis was previously hypothesized to be osmotic when cation leaks were observed, and salt loading was suggested as a cause of the cell swelling upon resuspension in an isotonic medium. However, it was problematic to account for the salt loading since the plasma membrane of human RBCs was considered impermeable to cations. In this study, the hypertonicity-related behavior of human RBCs is revisited within the framework of modern cell physiology, considering current knowledge on membrane ion transport mechanisms - an account still missing. It is recognized here that the hypertonic behavior of human RBCs is consistent with the acute regulatory volume increase (RVI) response - a healthy physiological reaction initiated by cells to regulate their volume by salt accumulation. It is shown by reviewing the published studies that human RBCs can increase cation conductance considerably by activating cell volume-regulated ion transport pathways inactive under normal isotonic conditions and thus facilitate salt loading. A simplified physiological model accounting for transmembrane ion fluxes and membrane voltage predicts the isotonic cell swelling associated with increased cation conductance, eventually reaching hemolytic volume. The proposed involvement of cell volume regulation mechanisms shows the potential to explain the complex nature of the osmotic response of human RBCs and other cells. Cryobiological implications, including mechanisms of cryoprotection, are discussed.
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Affiliation(s)
- Ivan Klbik
- Institute of Physics SAS, Dúbravská cesta 9, 845 11, Bratislava, Slovak Republic; Department of Experimental Physics, FMFI UK, Mlynská dolina F1, 842 48, Bratislava, Slovak Republic.
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2
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Fan Y, Li X, Li J, Xiong X, Yin S, Fu W, Wang P, Liu J, Xiong Y. Differential metabolites screening in yak (Bos grunniens) seminal plasma after cryopreservation and the evaluation of the effect of galactose on post-thaw sperm motility. Theriogenology 2024; 215:249-258. [PMID: 38103402 DOI: 10.1016/j.theriogenology.2023.12.011] [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: 08/27/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
Sperm survival and activity depend on the provision of energy and nutrients from seminal plasma (SP). This study aimed to investigate the variations of metabolites within SP before and after freezing and subsequently explore the potential regulatory mechanisms affecting yak sperm cryodamage due to changes in metabolites in the SP. Untargeted metabolomics analysis was performed to screen for differential metabolites, followed by KEGG analysis to identify enriched signaling pathways. The combinatorial analysis of metabolomics and sperm proteomics revealed the influence of key SP metabolites on sperm proteins. Subsequently, the relevant differentially expressed proteins were verified by Western blot analysis. Finally, the mechanism underlying the positive effect of galactose on sperm motility was determined by assessing the change in ATP content in sperm before and after freezing and thawing. The data showed that a total of 425 and 269 metabolites were identified in the positive and negative ion modes, respectively. Freezing and thawing resulted in the up-regulation of 70 metabolites and the down-regulation of 29 metabolites in SP. The primary impact of freezing and thawing was observed in carbohydrate metabolism, including pyruvate metabolism, pentose phosphate pathway, galactose metabolism, the TCA cycle, and butanoate metabolism. In the combined analysis and Western blot results, a significant positive correlation was observed between galactose and Aldo-keto reductase family 1 member B1 (AKR1B1) (P < 0.05), which has the ability to convert galactose into galactol. Furthermore, the addition of galactose to thawed semen improved sperm motility by increasing AKR1B1 protein in sperm and was associated with the content of ATP. These data identify differential metabolites between fresh and frozen-thawed SP and suggest that galactose is a valuable additive for cryopreserved sperm, providing a theoretical basis for further exploration of the refrigerant formula for yak sperm cryopreservation.
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Affiliation(s)
- Yilin Fan
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Reservation and Utilization, Ministry of Education and Sichuan Province, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Xiaowei Li
- Longri Breeding Stock Farm of Sichuan Province, Dujiangyan, 611800, China
| | - Jian Li
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Reservation and Utilization, Ministry of Education and Sichuan Province, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China.
| | - Xianrong Xiong
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Reservation and Utilization, Ministry of Education and Sichuan Province, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Shi Yin
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Reservation and Utilization, Ministry of Education and Sichuan Province, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Wei Fu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Reservation and Utilization, Ministry of Education and Sichuan Province, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China
| | - Peng Wang
- Sichuan Ganzi Tibetan Autonomous Prefecture, Institute of Animal Husbandry Science, Kangding, 626000, China
| | - Jun Liu
- Sichuan Ganzi Tibetan Autonomous Prefecture, Institute of Animal Husbandry Science, Kangding, 626000, China
| | - Yan Xiong
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Reservation and Utilization, Ministry of Education and Sichuan Province, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu, 610041, China.
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3
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Ozimic S, Ban-Frangez H, Stimpfel M. Sperm Cryopreservation Today: Approaches, Efficiency, and Pitfalls. Curr Issues Mol Biol 2023; 45:4716-4734. [PMID: 37367049 DOI: 10.3390/cimb45060300] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/28/2023] Open
Abstract
The cryopreservation of human spermatozoa has been an option for patients undergoing chemo or radiotherapies since the late 1950s. Presently, there are different techniques for the cryopreservation of spermatozoa. The most commonly used techniques are programmable slow freezing and freezing on liquid nitrogen vapors, while the use of vitrification is still not accepted as clinically relevant. Although there have been many improvements, the ideal technique for achieving better post-thaw sperm quality continues to be a mystery. A major obstacle during cryopreservation is the formation of intracellular ice crystals. Cryodamage generated by cryopreservation causes structural and molecular alterations in spermatozoa. Injuries can happen because of oxidative stress, temperature stress, and osmotic stress, which then result in changes in the plasma membrane fluidity, motility, viability, and DNA integrity of the spermatozoa. To prevent cryodamage as much as possible, cryoprotectants are added, and in some clinical trial cases, even antioxidants that may improve post-thaw sperm quality are added. This review discusses cryopreservation techniques, cryodamage on molecular and structural levels, and cryoprotectants. It provides a comparison of cryopreservation techniques and describes recent advances in those techniques.
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Affiliation(s)
- Sanja Ozimic
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
| | - Helena Ban-Frangez
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Martin Stimpfel
- Department of Human Reproduction, Division of Obstetrics and Gynecology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
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4
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Málková A, Savvulidi FG, Ptáček M, Machová K, Janošíková M, Nagy S, Stádník L. Glycerol-Free Equilibration with the Addition of Glycerol Shortly before the Freezing Procedure: A Perspective Strategy for Cryopreservation of Wallachian Ram Sperm. Animals (Basel) 2023; 13:ani13071200. [PMID: 37048456 PMCID: PMC10093609 DOI: 10.3390/ani13071200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/20/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
This study investigated the effect of glycerol added in different phases of sperm equilibration on CASA and flow cytometry parameters of thawed ram spermatozoa. Sperm was collected from adult Wallachian rams. The freezing extender was glycerol-free ANDROMED® (Minitub GmbH, Tiefenbach, Germany) supplied by 6% exogenous glycerol at different stages of the cryopreservation process. The purpose of this study was to compare two strategies of glycerol addition for sperm cryopreservation. The first strategy included the use of a glycerol-free extender for the procedure of glycerol-free equilibration and chilling, with the glycerolation of the extender by 6% glycerol shortly before sperm slow freezing (GFA). The second strategy included the use of a freezing extender already glycerolated by 6% glycerol before the equilibration and chilling of sperm and following slow freezing (GA). Sperm samples were analyzed after equilibration (but before freezing) and after thawing (at T0, T1 h, and T2 h time points). iSperm® mCASA (Aidmics Biotechnology Co., LTD., Taipei, Taiwan) was used for the evaluation of sperm kinematics. Flow cytometry was used to measure sperm viability (plasma membrane/acrosome intactness) and mitochondrial membrane potential. The obtained results significantly demonstrated that the glycerol-free equilibration with the addition of glycerol shortly before freezing is a perspective strategy for cryopreservation of Wallachian ram sperm.
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Affiliation(s)
- Anežka Málková
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic; (A.M.)
| | - Filipp Georgijevič Savvulidi
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic; (A.M.)
- Correspondence: ; Tel.: +420-223-383-069
| | - Martin Ptáček
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic; (A.M.)
| | - Karolína Machová
- Department of Genetics and Breeding, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic
| | - Martina Janošíková
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic; (A.M.)
| | - Szabolcs Nagy
- Institute of Animal Sciences, Hungarian University of Agriculture and Life Sciences, Georgikon Campus, H8360 Keszthely, Hungary
| | - Luděk Stádník
- Department of Animal Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic; (A.M.)
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5
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Viera MN, Santiago-Moreno J, Ungerfeld R. Comparison of the Conventional and Ultra-Rapid Freezing Techniques in Gabon Bucks Throughout the Year. Biopreserv Biobank 2021; 19:312-317. [PMID: 33751902 DOI: 10.1089/bio.2020.0155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The aim of this work was to compare the effectiveness of ultra-rapid freezing (UF) and conventional slow freezing (CF) to cryopreserve buck sperm throughout the year. During 1 year, semen from 10 adult Gabon bucks was collected by electroejaculation every 2 weeks. Before and after freezing, samples were selected by density gradient centrifugation, and after sperm selection, the sample was divided into two aliquots. One aliquot was CF with an extender based on Tris, citric acid, and glucose (TCG) +6% yolk +5% glycerol, and maintained at 5°C for 3 hours of equilibration before freezing. The other aliquot was frozen using an UF method with an extender based on TCG +6% yolk +100 mM sucrose, and maintained at 5°C for 30 minutes. The evaluations included the percentages of motile sperm, sperm with progressive motility, quality of sperm motility, and the percentages of sperm with functional membrane, live sperm, sperm with morphoabnormalities, and sperm with intact acrosome. The percentage of sperm with intact acrosome was higher using the conventional freezing method (p < 0.05). After thawing and at pre- and postselection stages, the quality of motility, and the percentages of motile sperm, progressive motile sperm, sperm with functional membrane, and with intact acrosome were greater using CF than UF (p < 0.005). Conventional freezing was more effective than UF to cryopreserve sperm from Gabon bucks, at least in our experimental conditions. Most differences in favor of CF were observed in the quality of motility, and the percentages of motile sperm, progressive motile sperm, sperm with functional membrane, and with intact acrosome during long periods of the year, or even remained throughout it.
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Affiliation(s)
- Maria Noel Viera
- Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de la República, Montevideo, Uruguay
| | - Julián Santiago-Moreno
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain
| | - Rodolfo Ungerfeld
- Departamento de Biociencias Veterinarias, Facultad de Veterinaria, Universidad de la República, Montevideo, Uruguay
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6
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Zhou D, Wang XM, Li RX, Wang YZ, Chao YC, Liu ZZ, Huang ZH, Nie HC, Zhu WB, Tan YQ, Fan LQ. Improving native human sperm freezing protection by using a modified vitrification method. Asian J Androl 2021; 23:91-96. [PMID: 32567578 PMCID: PMC7831840 DOI: 10.4103/aja.aja_29_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Slow freezing is the most commonly used technique for the cryopreservation of spermatozoa in clinical practice. However, it has been shown to have a negative impact on sperm function and structure. Vitrification as a successful alternative method has been proved to have better protective effects on human embryos, but vitrification of spermatozoa is still subject to low recovery rates. In this study, a modified vitrification method for native spermatozoa was developed. A total of 28 semen samples were included; each sample was divided into three equal parts and assigned to fresh, slow freezing, and vitrification groups. Sperm vitality, motility, morphology, DNA integrity, and acrosome reaction were assessed for each of the groups. The results showed that vitrification achieves better results for several sperm protection parameters than slow freezing; vitrification achieves a higher recovery rate (P < 0.05), motility (P < 0.05), morphology (P < 0.05), and curve line velocity (P < 0.05) than slow freezing. Furthermore, DNA fragmentation was decreased (P < 0.05) and better acrosome protection (P < 0.05) was exhibited in the spermatozoa after vitrification. Principal component analysis of all sperm parameters revealed that the vitrification cluster was closer to the fresh cluster, indicating that spermatozoa are better preserved through vitrification. In conclusion, while both slow freezing and vitrification have negative effects on sperm function and structure, the vitrification protocol described here had a relatively better recovery rate (65.8%) and showed improved preservation of several sperm quality parameters compared with slow freezing.
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Affiliation(s)
- Dai Zhou
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410000, China
| | - Xing-Ming Wang
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China
| | - Rui-Xue Li
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China
| | - Yi-Ze Wang
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China
| | - Yuan-Chi Chao
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China
| | - Zhi-Zhong Liu
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Department of Urology, Hunan Cancer Hospital, Changsha 410000, China
| | - Zeng-Hui Huang
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410000, China
| | - Hong-Chuan Nie
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410000, China
| | - Wen-Bing Zhu
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410000, China
| | - Yue-Qiu Tan
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410000, China
| | - Li-Qing Fan
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medicine Science, Central South University, Changsha 410000, China.,Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha 410000, China
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7
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Abstract
Cryobiology is a multiscale and interdisciplinary field. The scope and scale of interactions limit the gains that can be made by one theory or experiment alone. Because of this, modeling has played a critical role in both explaining cryobiological phenomena and predicting improved protocols. Modeling facilitates understanding of the biophysical and some of the biochemical mechanisms of damage during all phases of cryopreservation including CPA equilibration and cooling and warming. Moreover, as a tool for optimization of cryopreservation protocols, modeling has yielded many successes. Modern cryobiological modeling includes very detailed descriptions of the physical phenomena that occur during freezing, including ice growth kinetics and spatial gradients that define heat and mass transport models. Here we reduce the complexity and approach only a small but classic subset of these problems. Namely, here we describe the process of building and using a mathematical model of a cell in suspension where spatial homogeneity is assumed for all quantities. We define the models that describe the critical cell quantities used to describe optimal and suboptimal protocols and then give an overview of classical methods of how to determine optimal protocols using these models. We include practical considerations of modeling in cryobiology, including fitting transport models to cell volume data, performing optimization with cell volume constraints, and a look at expanding cost functions to cooling regimes.
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Affiliation(s)
- James D Benson
- Department of Biology, University of Saskatchewan, Saskatoon, SK, Canada.
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8
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Wang S, Jin S, Li G, Sun R, Shu Q, Wu S. Decompression Process of Glycerol Shock Treatment Can Overcome Endo-Lysosomal Barriers for Intracellular Delivery. ACS OMEGA 2020; 5:33133-33139. [PMID: 33403275 PMCID: PMC7774252 DOI: 10.1021/acsomega.0c04771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 10/28/2020] [Indexed: 06/12/2023]
Abstract
The glycerol shock treatment has been used to improve the calcium phosphate transfection efficacy for several decades because of its high effectiveness and low toxicity. However, the mechanism of glycerol shock treatment is still obscure. In this study, the endo-lysosomal leakage assay demonstrated that the decompression process of glycerol shock treatment could enhance endo-lysosomal membrane permeabilization, which resulted in facilitating endo-lysosomal escape for effective intracellular delivery. The enhanced decompression treatment derived from glycerol shock treatment could increase the change of osmotic pressure further, which showed higher efficacy for intracellular delivery. Herein, we speculated that the endo-lysosomal swelling originated from the decompression process of glycerol shock treatment could cause endo-lysosomal damage.
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Affiliation(s)
- Shupeng Wang
- School
of Material Science and Engineering, Beijing
Institute of Technology, Beijing 100081, China
- The
Affiliated Luohu Hospital of Shenzhen University, Shenzhen University, Shenzhen 518001, China
| | - Shaohua Jin
- School
of Material Science and Engineering, Beijing
Institute of Technology, Beijing 100081, China
| | - Guangzhi Li
- The
Affiliated Luohu Hospital of Shenzhen University, Shenzhen University, Shenzhen 518001, China
| | - Rui Sun
- The
Affiliated Luohu Hospital of Shenzhen University, Shenzhen University, Shenzhen 518001, China
| | - Qinghai Shu
- School
of Material Science and Engineering, Beijing
Institute of Technology, Beijing 100081, China
| | - Song Wu
- The
Affiliated Luohu Hospital of Shenzhen University, Shenzhen University, Shenzhen 518001, China
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9
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Hu H, Shi X, Ji G, Liu R, Zhang J, Zhang H, Li M. Studies on the basic issues relevant to sperm cryopreservation in humans. Ther Adv Reprod Health 2020; 14:2633494120909375. [PMID: 32518916 PMCID: PMC7254583 DOI: 10.1177/2633494120909375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 01/27/2020] [Indexed: 11/16/2022] Open
Abstract
Rapid freezing and vitrification are becoming popular for sperm freezing in humans; however, basic and critical issues relevant to sperm cryopreservation remain to be resolved. The aims of the present study were to study the effects of osmolality of freezing medium, sperm concentrations, thawing methods, and sugars (sucrose and trehalose) on sperm motility and DNA integrity by rapid freezing using 0.5 ml standard straws loaded with 100 µl sperm each. The results showed that (1) the post-thaw recovery rates of total motility and progressive motility of sperm cryopreserved in freezing medium containing 0.25 M sucrose with 442 mOsm/kg osmolality were significantly higher (p < 0.05) than that of sperm cryopreserved in freezing medium containing 0.25 M sucrose with 536 mOsm/kg osmolality (36.5 ± 2.8% and 36.9 ± 1.7% versus 30.4 ± 1.9% and 30.3 ± 2.9%, respectively), (2) cryopreservation of both total and progressive motilities was not significantly affected (p > 0.05) by sperm concentrations in the range from 5 to 20 × 106 sperm/ml, (3) thawing method 37°C for 2 min was better than 42°C for 15 s in terms of post-thaw recovery rates of both total and progressive motilities (p < 0.05), (4) 0.25 M trehalose was better than 0.25 M sucrose in cryopreserving both total and progressive motilities (p < 0.05), and (5) sperm nuclear DNA is relatively resistant to the changes of the above factors compared with sperm motility. It was concluded that human sperm can be best cryopreserved by rapid freezing using 0.25 M sucrose or trehalose with osmolality 442 to 457 mOsm/kg at high sperm concentration followed by thawing at 37°C. Trehalose is a stronger cryoprotectant than sucrose for sperm cryopreservation.
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Affiliation(s)
- Huanhuan Hu
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Xiaowei Shi
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Guojie Ji
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Rui Liu
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Jing Zhang
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Han Zhang
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang, China
| | - Mingwen Li
- Key Laboratory of Fertility Preservation, School of Life Sciences and Technologies, Sanquan College of Xinxiang Medical University, Xinxiang 453003, China
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10
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Ebrahimi M, Parham A. Using Herbal dyes as an alternative staining method for sperm evaluation. Vet Med Sci 2020; 6:441-446. [PMID: 32323476 PMCID: PMC7397902 DOI: 10.1002/vms3.268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/07/2020] [Accepted: 03/23/2020] [Indexed: 11/20/2022] Open
Abstract
Staining, as a valuable method for sperm morphological assessment, has been used to determine sperm abnormalities, fertilization capability and sperm suitability during freezing‐thawing process. Synthetic dyes have been used for sperm viability and morphological evaluation. However, most of them have been made from chemical substances and have a perilous effect on the environment. In the current study, we evaluated three different natural dyes as the natural sources of dye for sperm staining. Bull frozen semen was used and prepared on slides for staining. Aqueous extract dye of black mulberry (BM), henna (HA), safflower (SA) and eosin‐nigrosine (control group) were used for sperm staining. Additionally, the effect of staining dyes on viability and some morphological parameters (head area: HR, head abnormality: HB and tail abnormality: TA) were evaluated. Although none of the natural dyes could detect viability of the sperm cells, safflower stain (HR: 26.55 µm, HB: 0% TA: 28%) and black mulberry stain (HR: 25.07 µm, HB: 2% TA: 3%) compared to control group (HR: 34.29 µm, HB: 4%, TA: 4%) provoked a strong reaction in the sperm cells, so that the sperms were observed yellow and red respectively. The reaction of sperm cells to the henna dye was very poor and it did not stain the sperm cells. Thus, the present study demonstrated that SA and BM dyes are able to stain the spermatozoa and with further modification could be used as alternative dyes for sperm staining in the study of sperm morphology, but not viability. Staining with these dyes can be an alternative to current costly chemical staining methods.
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Affiliation(s)
- Mohammadreza Ebrahimi
- Division of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Abbas Parham
- Division of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.,Stem Cell Biology and Regenerative Medicine Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
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11
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Does Coenzyme Q10 Exert Antioxidant Effect on Frozen Equine Sperm? J Equine Vet Sci 2020; 88:102964. [PMID: 32303314 DOI: 10.1016/j.jevs.2020.102964] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/03/2020] [Accepted: 02/05/2020] [Indexed: 11/23/2022]
Abstract
During semen cryopreservation, the sensitivity of equine sperm to oxidative stress is increased by the eliminated seminal plasma. Thus, antioxidant addition to the semen extender can be helpful to the sperm survival after freezing and thawing. This work aimed to test whether coenzyme Q10 (CoQ10) added in different concentrations to the INRA 82 freezing extender has antioxidant function on equine sperm to improve its fertilizing ability. Semen samples from five stallions were frozen with the extenders: (T1) INRA 82, control, (T2) T1+ 5 μM CoQ10, (T3) T1+ 25 μM CoQ10, and (T4) T1+ 50 μM CoQ10. After sample thawing, sperm motility and kinetics characteristics were evaluated using a computer-assisted sperm analysis and sperm membrane functionality and integrity were evaluated with a hypo-osmotic swelling test and an epifluorescence microscopy, respectively. The nitrite (NO2-) and hydrogen peroxide (H2O2) concentrations of the semen samples were measured with spectrophotometry. There was no difference on the sperm characteristics among all treatments (P > .05). However, the 25 μM CoQ10 (T3) decreased NO2- concentration (6.7 ± 2.2 μM/μg protein) compared with the treatments T1, T2, and T4 (64.3 ± 3.7, 59.4 ± 5.3, 45.1 ± 8.6 μM/μg protein), respectively, as well H2O2 concentration (1.8 ± 0.3 μM/μg protein) compared with the control (4.6 ± 0.4 μM/μg protein) and 5 μM CoQ10 treatments (4.8 ± 0.2 μM/μg protein, P < .05). In conclusion, 25 μM CoQ10 plays a significant role as antioxidant to the frozen equine sperm, decreasing NO2- and H2O2 concentrations. Thus, its addition to the INRA 82 freezing extender may be beneficial to the fertilizing ability of equine semen.
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Kumar A, Prasad JK, Srivastava N, Ghosh SK. Strategies to Minimize Various Stress-Related Freeze-Thaw Damages During Conventional Cryopreservation of Mammalian Spermatozoa. Biopreserv Biobank 2019; 17:603-612. [PMID: 31429586 DOI: 10.1089/bio.2019.0037] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The aim of the article is to report a review on different sperm cryopreservation techniques, various stress-related freeze-thaw damages altering sperm structure and function during conventional cryopreservation, and strategies to minimize these stresses. Sperm cryopreservation has allowed indefinite storage and successful transportation of valuable germplasm from proven sites at distant locations, for genetic upgradation through implementation of reproductive techniques, such as artificial insemination. Different techniques for sperm cryopreservation have been proposed such as conventional freezing techniques, directional freezing, and sperm vitrification. Drawbacks related to conventional freezing methods, such as heterogeneous ice nucleation and repeated freeze-thaw cycles at the ice front that disrupts and kill sperm cells, led to the emergence of the directional freezing technique. Sperm vitrification is advantageous as there is no ice crystal-induced physical damages to sperm. However, sperm vitrification has less applicability as encouraging results are only reported in human, dog, and cat. In spite of several drawbacks, conventional freezing techniques are still most widely used for sperm cryopreservation. Spermatozoa experience stresses in the form of cold shock, osmotic stress, and mainly oxidative stress during conventional cryopreservation ultimately reduces the sperm viability and fertility. Several attempts have been made in the past to minimize all these stresses individually or in combination. Membrane fluidity was increased to prevent the cold shock and cryocapacitation-like changes by the addition of cholesterol to the membrane. Antifreeze proteins were added in semen extender to minimize freeze-thaw damages due to heterogeneous ice nucleation and ice recrystallization. Oxidative stress was reduced either by neutralizing reactive oxygen species (ROS) through enzymatic, nonenzymatic, plant-based antioxidants or reductants; or by minimizing the level of sources like the semen radiation exposure, leucocytes, and dead and defective spermatozoa, which lead to ROS production during the semen cryopreservation process. A novel approach of minimizing oxidative stress was to reduce the oxygen tension in sperm microenvironment that is, extender by partial deoxygenation process, as a number of literatures pointed out direct link of O2 with ROS production. When compared with other strategies, partial deoxygenation of semen extender with N2 gassing is found as a cost-effective, comparatively easy and a potential approach to large-scale frozen semen production.
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Affiliation(s)
- Abhishek Kumar
- Germ-Plasm Centre, Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - J K Prasad
- Germ-Plasm Centre, Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - N Srivastava
- Germ-Plasm Centre, Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - S K Ghosh
- Germ-Plasm Centre, Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Izatnagar, India
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Arando A, Delgado JV, Arrebola FA, León JM, Alcalá CJ, Pérez-Marín CC. Vitrification induces critical subcellular damages in ram spermatozoa. Cryobiology 2019; 87:52-59. [DOI: 10.1016/j.cryobiol.2019.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 02/25/2019] [Indexed: 10/27/2022]
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14
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Effects of different concentration and combinations of cryoprotectants on sperm quality, functional integrity in three Indian horse breeds. Cryobiology 2019; 86:52-57. [DOI: 10.1016/j.cryobiol.2018.12.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 12/15/2018] [Accepted: 12/17/2018] [Indexed: 11/21/2022]
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El-Ahwany A, Samir H, Alahwany H. Using two different thawing temperatures and their effect on the motility recovery of human cryopreserved sperms in cancer patients. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2018. [DOI: 10.1016/j.mefs.2018.04.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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16
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Wojtusik J, Stoops MA, Roth TL. Comparison of soy lecithin, coconut water, and coconut milk as substitutes for egg-yolk in semen cryodiluent for black rhinoceros (Diceros bicornis) and Indian rhinoceros (Rhinoceros unicornis). Theriogenology 2018; 121:72-77. [PMID: 30138797 DOI: 10.1016/j.theriogenology.2018.07.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 07/30/2018] [Accepted: 07/30/2018] [Indexed: 11/15/2022]
Abstract
Semen cryopreservation for the black rhinoceros (Diceros bicornis) and Indian rhinoceros (Rhinoceros unicornis) relies on extenders containing egg-yolk (EY). Use of such media is not ideal as inter-batch composition varies and there is risk of pathogenic contamination. The goal of this study was to test animal protein-free extenders. Semen collected via electroejaculation from 10 rhinoceros (6 black, 4 Indian) was diluted with extender containing EY, 1% or 2% soy lecithin (1%SL; 2%SL), coconut water (CW), or coconut milk (CM), cryopreserved and evaluated for sperm motility, viability, morphology, progression, and acrosomal integrity at 0, 1, 3, 6 and 24 h post-thaw. Mean ± SD fresh ejaculate motility was 84.5 ± 7.6%, progression: 3.6 ± 0.6 (scale 0-5), viability: 83.4 ± 7.1%, intact acrosomes: 71.3 ± 6.9%, and morphologically normal: 78.8 ± 13.6%. Motility and progression decreased in all groups post-thaw, were greatest in EY, and decreased over time (P ≤ 0.05). Motility and progression did not differ (P > 0.05) between 1%SL and 2%SL, but were lower (P ≤ 0.05) in CM and CW, and acrosomal integrity was higher (P ≤ 0.05) in EY, 1%SL and 2%SL than in CM and CW. Post-thaw viability was greatest in EY and 2%SL followed by 1%SL, then CM and CW (P ≤ 0.05). Morphology did not differ among treatments (P > 0.05). Morphology, acrosomal integrity, and viability were maintained over time (P > 0.05). Although some rhinoceros sperm survived cryopreservation in SL treatments, reduced post-thaw motility rendered all treatments inadequate substitutes for EY-based extenders.
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Affiliation(s)
- Jessye Wojtusik
- Cincinnati Zoo and Botanical Garden, Center for Conservation and Research of Endangered Wildlife, 3400 Vine St., Cincinnati, OH, 45220, USA.
| | - Monica A Stoops
- Cincinnati Zoo and Botanical Garden, Center for Conservation and Research of Endangered Wildlife, 3400 Vine St., Cincinnati, OH, 45220, USA
| | - Terri L Roth
- Cincinnati Zoo and Botanical Garden, Center for Conservation and Research of Endangered Wildlife, 3400 Vine St., Cincinnati, OH, 45220, USA
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Andraszek K, Banaszewska D, Biesiada-Drzazga B. The use of two staining methods for identification of spermatozoon structure in roosters. Poult Sci 2018; 97:2575-2581. [PMID: 29617901 DOI: 10.3382/ps/pey056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 03/28/2018] [Indexed: 11/20/2022] Open
Abstract
Many of the methods used to stain semen result in very pronounced coloring of the sperm, but unfortunately they do not distinguish their individual structures, which play a key role in the fertilization process. Hence the aim of this study was to identify sperm structures using two staining techniques in the semen of roosters from breeding flocks. The subject of the study was the sperm of roosters from a Ross 308 breeding flock. To capture the differences in the dimensions of sperm subjected to the effect of different chemical substances in dyes, microscope slides were stained by two techniques: with an AgNO3 solution and by a differential method (eosin-nigrosin test). Assessment was made of the degree of coloration and the number of details that could be identified in the morphological structure of the sperm. The use of AgNO3 allowed accurate identification of the acrosome, nucleus, and midpiece, which were visible in the slides stained with eosin-nigrosin, but only in dead spermatozoa. The AGNO3 staining technique used in this study reveals the cell nucleus within the head and can be an alternative method to analysis with a scanning electron microscope. This staining technique can be used to stain sperm structures that cannot be seen in other methods of slide preparation, which means that it can be considered for routine use in assessing the fertility of roosters in breeder flocks.
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Affiliation(s)
- K Andraszek
- Department of Animal Genetics and Horse Breeding
| | - D Banaszewska
- Department of Breeding Methods and Poultry Breeding, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - B Biesiada-Drzazga
- Department of Breeding Methods and Poultry Breeding, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
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Bóveda P, Esteso M, Castaño C, Toledano-Díaz A, López-Sebastián A, Muñiz A, Prieto P, Mejía O, Ungerfeld R, Santiago-Moreno J. Slow and ultra-rapid freezing protocols for cryopreserving mouflon ( Ovis musimon ) and fallow deer ( Dama dama ) epididymal sperm. Anim Reprod Sci 2018; 192:193-199. [DOI: 10.1016/j.anireprosci.2018.03.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/28/2018] [Accepted: 03/07/2018] [Indexed: 12/19/2022]
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Benson JD, Higgins AZ, Desai K, Eroglu A. A toxicity cost function approach to optimal CPA equilibration in tissues. Cryobiology 2018; 80:144-155. [PMID: 28966012 PMCID: PMC8183460 DOI: 10.1016/j.cryobiol.2017.09.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/26/2017] [Accepted: 09/27/2017] [Indexed: 11/27/2022]
Abstract
There is growing need for cryopreserved tissue samples that can be used in transplantation and regenerative medicine. While a number of specific tissue types have been successfully cryopreserved, this success is not general, and there is not a uniform approach to cryopreservation of arbitrary tissues. Additionally, while there are a number of long-established approaches towards optimizing cryoprotocols in single cell suspensions, and even plated cell monolayers, computational approaches in tissue cryopreservation have classically been limited to explanatory models. Here we develop a numerical approach to adapt cell-based CPA equilibration damage models for use in a classical tissue mass transport model. To implement this with real-world parameters, we measured CPA diffusivity in three human-sourced tissue types, skin, fibroid and myometrium, yielding propylene glycol diffusivities of 0.6 × 10-6 cm2/s, 1.2 × 10-6 cm2/s and 1.3 × 10-6 cm2/s, respectively. Based on these results, we numerically predict and compare optimal multistep equilibration protocols that minimize the cell-based cumulative toxicity cost function and the damage due to excessive osmotic gradients at the tissue boundary. Our numerical results show that there are fundamental differences between protocols designed to minimize total CPA exposure time in tissues and protocols designed to minimize accumulated CPA toxicity, and that "one size fits all" stepwise approaches are predicted to be more toxic and take considerably longer than needed.
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Affiliation(s)
- James D Benson
- Department of Biology, University of Saskatchewan, Canada.
| | - Adam Z Higgins
- School of Chemical, Biological and Environmental Engineering, Oregon State University, USA
| | - Kunjan Desai
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, USA
| | - Ali Eroglu
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, USA
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Kondracki S, Wysokińska A, Kania M, Górski K. Application of Two Staining Methods for Sperm Morphometric Evaluation in Domestic Pigs. J Vet Res 2017; 61:345-349. [PMID: 29978093 PMCID: PMC5894426 DOI: 10.1515/jvetres-2017-0045] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 08/23/2017] [Indexed: 11/28/2022] Open
Abstract
Introduction The effect of two smear staining methods on the dimensions and shape of sperm cells in the semen of domestic pigs was evaluated. Material and Methods The studies were carried out on 30 ejaculates collected from 15 boars, which included five Duroc boars, five Pietrain boars, and five hybrid Duroc × Pietrain boars. Each ejaculate was next sampled to make two microscopic slides, of which one was stained with eosin-nigrosin and the other with eosin-gentian dye. In total, 600 measurements of sperm cells were made. Each sperm was measured for the following morphometric parameters: head length, head width, head area, head perimeter, tail length, and the total sperm length. Results Sperms measured on slides stained with eosin-nigrosin showed lower dimensions as compared with those stained with the eosin-gentian dye method. Sperm stained with eosin-nigrosin had shorter and narrower heads than sperm stained with eosin-gentian dye. The method of staining, therefore, affected not only the dimensions of the sperm, but also the proportions of the dimensions defining the shape of the sperm. Conclusions The size and shape parameters in porcine sperm may take on different values depending on the method of semen staining. Sperm cells stained with eosin-nigrosin are smaller than the sperm stained with eosin-gentian dye. The sensitivity of the sperm to the type of dye used for the fixation may be associated with genetic factors.
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Affiliation(s)
- Stanisław Kondracki
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - Anna Wysokińska
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - Magdalena Kania
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
| | - Krzysztof Górski
- Department of Bioengineering and Animal Breeding, Faculty of Natural Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland
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Arando A, Gonzalez A, Delgado J, Arrebola F, Perez-Marín C. Storage temperature and sucrose concentrations affect ram sperm quality after vitrification. Anim Reprod Sci 2017; 181:175-185. [DOI: 10.1016/j.anireprosci.2017.04.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/16/2017] [Accepted: 04/21/2017] [Indexed: 11/15/2022]
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22
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Schulz M, Risopatrón J, Matus G, Pineda E, Rojas C, Isachenko V, Isachenko E, Sánchez R. Trehalose sustains a higher post-thaw sperm motility than sucrose in vitrified human sperm. Andrologia 2017; 49. [PMID: 28543267 DOI: 10.1111/and.12757] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2016] [Indexed: 01/13/2023] Open
Abstract
One of the cryopreservation methods that best preserves sperm function is vitrification. However, comparative studies have not been performed to evaluate the effect of nonpermeable cryoprotectors on sperm function for prolonged periods of time post-devitrification. These times are necessary, especially in in vitro fertilisation and intrauterine insemination, for gamete interaction and then fertilisation to occur, while maintaining motility to arrive at the fertilisation site. In this study, sucrose (.25 m) and trehalose (.1 and .05 m) were compared in essential parameters like motility and plasma membrane integrity for 12 hr. Post-devitrification sperm motility using .1 m trehalose was 68.9%, higher than that obtained with .05 m trehalose (59.9%, p < .0081) and .25 m sucrose (57.9%, p < .0002). Similar results were obtained at 6 and 12 hr with .1 m trehalose (58.0% and 42.3% respectively) compared to .05 m trehalose (p < .0184 and p < .033) and .25 m sucrose (p < .0001 and p < .0012).There was no difference between .25 m sucrose and .05 m trehalose. Membrane integrity was best preserved at time 0 by .1 m trehalose (p < .05), but there was no significance at 6 and 12 hr compared to sucrose. Our results suggest that for assisted reproduction techniques that require motile spermatozoa for a longer period of time, use of .1 m trehalose is recommended in the sperm vitrification technique.
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Affiliation(s)
- M Schulz
- Center for Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Doctorate in Morphological Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - J Risopatrón
- Center for Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Basic Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - G Matus
- Center for Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - E Pineda
- Center for Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - C Rojas
- Center for Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - V Isachenko
- Department of Obstetrics and Gynecology, University of Cologne, Köln, Germany
| | - E Isachenko
- Department of Obstetrics and Gynecology, University of Cologne, Köln, Germany
| | - R Sánchez
- Center for Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
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Pradiee J, O’Brien E, Esteso M, Castaño C, Toledano-Díaz A, Lopez-Sebastián A, Marcos-Beltrán J, Vega R, Guillamón F, Martínez-Nevado E, Guerra R, Santiago-Moreno J. Effect of shortening the prefreezing equilibration time with glycerol on the quality of chamois (Rupicapra pyrenaica), ibex (Capra pyrenaica), mouflon (Ovis musimon) and aoudad (Ammotragus lervia) ejaculates. Anim Reprod Sci 2016; 171:121-8. [DOI: 10.1016/j.anireprosci.2016.06.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/02/2016] [Accepted: 06/10/2016] [Indexed: 12/26/2022]
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Zou L, Ding W, Sun S, Tang F, Gao D. Fatigue damage to pig erythrocytes during repeated swelling and shrinkage. Cryobiology 2015; 71:210-5. [PMID: 26143742 DOI: 10.1016/j.cryobiol.2015.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 06/05/2015] [Accepted: 07/02/2015] [Indexed: 01/28/2023]
Abstract
During the removal of cryoprotectants from cryopreserved-thawed blood with the dialysis-based or dilution-filtration method, due to the change in the extracellular osmolality, erythrocytes usually undergo repeated swelling and shrinkage. However, the erythrocyte fatigue damage induced by this repeated volume change has not yet been studied. In this work, by successively loading hypotonic and hypertonic solutions, we mimicked the repeated swelling and shrinkage of pig erythrocytes and then examined the effect of the number of cycle loops on the steady-state volume and the mortality of the pig erythrocytes. The results suggest that because of cell leakage in the swelling process, the steady-state volume of the pig erythrocytes after one cycle is smaller than the volume before the cycle, even though the cell performs a self-protective regulatory procedure. If the number of cycle loops is increased, the repeated swelling and shrinkage will cause a continuous decrease in the steady-state volume, and the ability of the pig erythrocytes to resist osmotic damage will decrease; as a result, the mortality of the pig erythrocytes increases as the number of cycle loops increases. The viability of the cells is also affected by the hypotonic and isotonic processing times: a short processing time may contribute to a decrease in the mortality of the pig erythrocytes. This work is of significance to optimizing the process of removing cryoprotectants.
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Affiliation(s)
- Lili Zou
- Center for Biomedical Engineering, University of Science and Technology of China, Hefei, Anhui 230027, China; Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Weiping Ding
- Center for Biomedical Engineering, University of Science and Technology of China, Hefei, Anhui 230027, China; Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China.
| | - Sijie Sun
- Department of Laboratory Medicine, University of Washington, Seattle, WA 98195, USA
| | - Fangqiong Tang
- Center for Biomedical Engineering, University of Science and Technology of China, Hefei, Anhui 230027, China; Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Dayong Gao
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
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Abstract
Modeling plays a critical role in understanding the biophysical processes behind cryopreservation. It facilitates understanding of the biophysical and some of the biochemical mechanisms of damage during all phases of cryopreservation including CPA equilibration, cooling, and warming. Modeling also provides a tool for optimization of cryopreservation protocols and has yielded a number of successes in this regard. While modern cryobiological modeling includes very detailed descriptions of the physical phenomena that occur during freezing, including ice growth kinetics and spatial gradients that define heat and mass transport models, here we reduce the complexity and approach only a small but classic subset of these problems. Namely, here we describe the process of building and using a mathematical model of a cell in suspension where spatial homogeneity is assumed for all quantities. We define the models that describe the critical cell quantities used to describe optimal and suboptimal protocols and then give an overview of classical methods of how to determine optimal protocols using these models.
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Affiliation(s)
- James D Benson
- Department of Mathematical Sciences, Northern Illinois University, DeKalb, IL, 60115, USA,
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Quan GB, Li DJ, Ma Y, Zhu L, Lv CR, Hong QH. Cryopreservation of ram spermatozoa in the presence of cyclohexanhexol-derived synthetic ice blocker. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2014.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Gomes-Alves S, Alvarez M, Nicolas M, Martínez-Rodríguez C, Borragán S, Chamorro CA, Anel L, de Paz P. Salvaging urospermic ejaculates from brown bear (Ursus arctos). Anim Reprod Sci 2014; 150:148-57. [PMID: 25278437 DOI: 10.1016/j.anireprosci.2014.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 09/09/2014] [Accepted: 09/10/2014] [Indexed: 10/24/2022]
Abstract
The objective of this study was to reverse the osmotic stress of sperm in urine contaminated bear ejaculates that were obtained by electroejaculation using pre-freezing washing or density gradient centrifugation isolation. In Experiment 1, ejaculates were divided into six aliquots, five were diluted in each washing extender: 200, 300, 400, 500 and 700 mOsm/kg (prepared from a Tes-Tris-Fructose base, adding water or fructose as corresponds), at a 1:2 ratio (raw semen: washing solution, v/v); and the other aliquot was handled without washing (Control group). Samples were centrifuged at 600 × g for 6 min prior to freezing. In Experiment 2, ejaculates were divided into two aliquots: one was diluted 1:1 with TCG (Tris-Citric acid-Glucose) and centrifuged at 600 × g for 6 min (Centrifugation Control; C-Control); the other was treated with PureSperm density gradient column. After treatments, samples were cryopreserved. Sperm motility, viability (SYBR-14/propidium iodide (PI)) and acrosomal status (peanut agglutinin-fluorescein isothiocyanate (PNA-FITC)/PI) were analyzed before and after freezing. Ejaculates with an initial osmolality of less than 120 mOsm/kg treated with pre-freezing washing, and the Control sample had greater pre-freezing sperm motility than the raw ejaculate, but sperm viability was not different among these groups. The samples washed with 700 mOsm/kg solutions had the least pre-freezing viability. In the post-thawing evaluation, pre-freezing washing treatments did not provide any improvement in comparison with the Control sample, and treatment with 700 mOsm/kg extender had deleterious effects in all urospermic samples. PureSperm density gradient centrifugation applied to urospermic raw semen was suitable for improving sperm motility and viability of pre-freezing samples and the selected spermatozoa had greater freezing capacity.
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Affiliation(s)
- S Gomes-Alves
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain; Animal Reproduction and Obstetrics, University of León, 24071 León, Spain
| | - M Alvarez
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain; Animal Reproduction and Obstetrics, University of León, 24071 León, Spain
| | - M Nicolas
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain; Animal Reproduction and Obstetrics, University of León, 24071 León, Spain
| | - C Martínez-Rodríguez
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain; Cell Biology, University of León, 24071 León, Spain
| | | | - C A Chamorro
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain
| | - L Anel
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain; Animal Reproduction and Obstetrics, University of León, 24071 León, Spain
| | - P de Paz
- ITRA-ULE, INDEGSAL, University of León, 24071 León, Spain; Cell Biology, University of León, 24071 León, Spain.
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Benson JD, Benson CT, Critser JK. Mathematical model formulation and validation of water and solute transport in whole hamster pancreatic islets. Math Biosci 2014; 254:64-75. [PMID: 24950195 DOI: 10.1016/j.mbs.2014.06.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 05/28/2014] [Accepted: 06/02/2014] [Indexed: 11/15/2022]
Abstract
Optimization of cryopreservation protocols for cells and tissues requires accurate models of heat and mass transport. Model selection often depends on the configuration of the tissue. Here, a mathematical and conceptual model of water and solute transport for whole hamster pancreatic islets has been developed and experimentally validated incorporating fundamental biophysical data from previous studies on individual hamster islet cells while retaining whole-islet structural information. It describes coupled transport of water and solutes through the islet by three methods: intracellularly, intercellularly, and in combination. In particular we use domain decomposition techniques to couple a transmembrane flux model with an interstitial mass transfer model. The only significant undetermined variable is the cellular surface area which is in contact with the intercellularly transported solutes, Ais. The model was validated and Ais determined using a 3×3 factorial experimental design blocked for experimental day. Whole islet physical experiments were compared with model predictions at three temperatures, three perfusing solutions, and three islet size groups. A mean of 4.4 islets were compared at each of the 27 experimental conditions and found to correlate with a coefficient of determination of 0.87±0.06 (mean ± SD). Only the treatment variable of perfusing solution was found to be significant (p<0.05). We have devised a model that retains much of the intrinsic geometric configuration of the system, and thus fewer laboratory experiments are needed to determine model parameters and thus to develop new optimized cryopreservation protocols. Additionally, extensions to ovarian follicles and other concentric tissue structures may be made.
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Affiliation(s)
- James D Benson
- Department of Mathematical Sciences, Northern Illinois University, DeKalb, IL 60178, USA.
| | - Charles T Benson
- Eli Lilly & Co., Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - John K Critser
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, USA
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Zhou X, Gao F, Shu Z, Chung JH, Heimfeld S, Gao D. Theoretical and experimental analyses of optimal experimental design for determination of hydraulic conductivity of cell membrane. Biopreserv Biobank 2014; 8:147-52. [PMID: 24836483 DOI: 10.1089/bio.2010.0011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Determination of cell hydraulic conductivity (Lp) is required to predict the optimal conditions for cell cryopreservation. One of the critical procedures associated with the determination of Lp is to measure the kinetics of cell volume change in response to a sudden cell exposure to anisosmotic media until the cells achieve an osmotic equilibrium state. To achieve accurate measurement, it should be ensured that (1) the cell osmotic equilibration process is sufficiently slow, and (2) the total cell volume change (ΔV) is much larger than the resolution of the measuring device (δ). In this article, a cell's half volume excursion time (t*) was defined as the time in which osmotically active cell water volume increases or decreases by half of its maximum change. Based on the water transport equations, a series of analytical solutions were derived. The t* and ΔV were expressed as functions of 2 control variables: initial intracellular osmolality (Mo) and extracellular osmolality (Me), and the effects of Me and Mo on t* and ΔV were predicted theoretically. The predictions were confirmed by performing experiments using two different cell types. In the light of this study, a strategy to optimize the experiment design for the Lp determination is suggested.
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Affiliation(s)
- Xiaoming Zhou
- 1 School of Mechatronics Engineering, University of Electronic Science and Technology of China , Chengdu, Sichuan, China
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31
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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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Kashuba CM, Benson JD, Critser JK. Rationally optimized cryopreservation of multiple mouse embryonic stem cell lines: I--Comparative fundamental cryobiology of multiple mouse embryonic stem cell lines and the implications for embryonic stem cell cryopreservation protocols. Cryobiology 2013; 68:166-75. [PMID: 24384367 DOI: 10.1016/j.cryobiol.2013.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 12/19/2013] [Accepted: 12/19/2013] [Indexed: 10/25/2022]
Abstract
The post-thaw recovery of mouse embryonic stem cells (mESCs) is often assumed to be adequate with current methods. However as this publication will show, this recovery of viable cells actually varies significantly by genetic background. Therefore there is a need to improve the efficiency and reduce the variability of current mESC cryopreservation methods. To address this need, we employed the principles of fundamental cryobiology to improve the cryopreservation protocol of four mESC lines from different genetic backgrounds (BALB/c, CBA, FVB, and 129R1 mESCs) through a comparative study characterizing the membrane permeability characteristics and membrane integrity osmotic tolerance limits of each cell line. In the companion paper, these values were used to predict optimal cryoprotectants, cooling rates, warming rates, and plunge temperatures, and then these predicted optimal protocols were validated against standard freezing protocols.
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Affiliation(s)
- Corinna M Kashuba
- Department of Biological Sciences, Northern Illinois University, DeKalb, IL 60115, USA.
| | - James D Benson
- Department of Mathematical Sciences, Northern Illinois University, DeKalb, IL 60115, USA
| | - John K Critser
- University of Missouri Comparative Medicine Center, 4011 Discovery Drive, Columbia, MO 65201, USA
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Lin CY, Wei PL, Chang WJ, Huang YK, Feng SW, Lin CT, Lee SY, Huang HM. Slow freezing coupled static magnetic field exposure enhances cryopreservative efficiency--a study on human erythrocytes. PLoS One 2013; 8:e58988. [PMID: 23520546 PMCID: PMC3592815 DOI: 10.1371/journal.pone.0058988] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 02/09/2013] [Indexed: 11/19/2022] Open
Abstract
The aim of this study was to assess the cryoprotective effect of static magnetic fields (SMFs) on human erythrocytes during the slow cooling procedure. Human erythrocytes suspended in 20% glycerol were slowly frozen with a 0.4-T or 0.8-T SMF and then moved to a -80°C freezer for 24 hr. The changes in survival rate, morphology, and metabolites of the thawed erythrocytes were examined. To understand possible cryoprotective mechanisms of SMF, membrane fluidity and dehydration stability of SMF-exposed erythrocytes were tested. For each test, sham-exposed erythrocytes were used as controls. Our results showed that freezing coupled with 0.4-T or 0.8-T SMFs significantly increased the relative survival ratios of the frozen-thawed erythrocytes by 10% and 20% (p<0.001), respectively. The SMFs had no effect on erythrocyte morphology and metabolite levels. However, membrane fluidity of the samples exposed to 0.8-T SMF decreased significantly (p<0.05) in the hydrophobic regions. For the dehydration stability experiments, the samples exposed to 0.8-T SMF exhibited significantly lower (p<0.05) hemolysis. These results demonstrate that a 0.8-T SMF decreases membrane fluidity and enhances erythrocyte membrane stability to resist dehydration damage caused by slow cooling procedures.
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Affiliation(s)
- Chun-Yen Lin
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Po-Li Wei
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of General Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
| | - Wei-Jen Chang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yung-Kai Huang
- School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Sheng-Wei Feng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Che-Tong Lin
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Sheng-Yang Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
- * E-mail: (SL); (HH)
| | - Haw-Ming Huang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
- * E-mail: (SL); (HH)
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Balasuriya A, Serhal P, Doshi A, Harper JC. Processes involved in assisted reproduction technologies significantly increase sperm DNA fragmentation and phosphatidylserine translocation. Andrologia 2012; 46:86-97. [PMID: 23230887 DOI: 10.1111/and.12052] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2012] [Indexed: 12/26/2022] Open
Abstract
Sperm preparation techniques in assisted reproduction technologies (ART) are potential generators of exogenous stresses that cause additional DNA damage. DNA fragmentation tests, such as the sperm chromatin structure assay, involve freezing sperm samples in the absence of cryoprotectant. Thermal, oxidative stress (OS) and freezing are detrimental to sperm DNA fragmentation and phosphatidylserine (PS) translocation. The primary aim of this study was to subject mature sperm to environmental insults that normally occur during ART. We tested the hypotheses that OS, thermal stress and freeze-thawing caused sperm nuclear and membrane damage and that a positive correlation exists between PS translocation and DNA fragmentation. Sperm DNA integrity deteriorates in semen samples from men with advancing age and a sperm concentration of <15 m ml(-1) . The significant increase in sperm DNA fragmentation at 37 °C after merely 1 h is important clinically as semen liquefaction and short-term sperm storage in an ART cycle involve incubating samples at this temperature. Freezing without a cryoprotectant significantly increases the level of sperm nuclear damage, so it is important not to freeze neat semen prior to DNA fragmentation testing. This study highlights the importance of minimising the production of exogenous stresses during sperm preparation in ART.
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Affiliation(s)
- A Balasuriya
- UCL Centre for PG & D, Institute for Women's Health, University College London, London, UK
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Darvishnia H, Lakpour N, Lahijani MS, Heidari-Vala H, Akhondi MA, Zeraati H, Sadeghi MR. Effects of very rapid versus vapor phase freezing on human sperm parameters. Cell Tissue Bank 2012. [DOI: 10.1007/s10561-012-9351-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Motile sperm subpopulations in frozen–thawed dog semen: Changes after incubation in capacitating conditions and relationship with sperm survival after osmotic stress. Anim Reprod Sci 2012; 133:214-23. [DOI: 10.1016/j.anireprosci.2012.06.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 06/18/2012] [Accepted: 06/21/2012] [Indexed: 01/21/2023]
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González-Fernández L, Morrell J, Peña F, Macías-García B. Osmotic shock induces structural damage on equine spermatozoa plasmalemma and mitochondria. Theriogenology 2012; 78:415-22. [DOI: 10.1016/j.theriogenology.2012.02.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 01/16/2012] [Accepted: 02/20/2012] [Indexed: 11/16/2022]
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Gianaroli L, Magli MC, Stanghellini I, Crippa A, Crivello AM, Pescatori ES, Ferraretti AP. DNA integrity is maintained after freeze-drying of human spermatozoa. Fertil Steril 2012; 97:1067-1073.e1. [DOI: 10.1016/j.fertnstert.2012.02.014] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 02/10/2012] [Accepted: 02/10/2012] [Indexed: 01/06/2023]
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40
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Macías García B, Ortega Ferrusola C, Aparicio I, Miró-Morán A, Morillo Rodriguez A, Gallardo Bolaños J, González Fernández L, Balao da Silva C, Rodríguez Martínez H, Tapia J, Peña F. Toxicity of glycerol for the stallion spermatozoa: Effects on membrane integrity and cytoskeleton, lipid peroxidation and mitochondrial membrane potential. Theriogenology 2012; 77:1280-9. [DOI: 10.1016/j.theriogenology.2011.10.033] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 09/29/2011] [Accepted: 10/25/2011] [Indexed: 11/17/2022]
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41
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Martínez-Soto JC, García-Vazquez FA, Gumbao D, Landeras J, Gadea J. Assessment of two thawing processes of cryopreserved human sperm in pellets. Cryobiology 2011; 63:131-6. [DOI: 10.1016/j.cryobiol.2011.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 06/14/2011] [Accepted: 08/09/2011] [Indexed: 11/26/2022]
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Sood S, Malecki IA, Tawang A, Martin GB. Response of spermatozoa from the emu (Dromaius novaehollandiae) to rapid cooling, hyperosmotic conditions and dimethylacetamide (DMA). Anim Reprod Sci 2011; 129:89-95. [PMID: 22078301 DOI: 10.1016/j.anireprosci.2011.10.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 10/11/2011] [Accepted: 10/15/2011] [Indexed: 11/16/2022]
Abstract
Three experiments conducted to improve the survival of emu sperm during cryopreservation aimed to: (1) minimize chilling injury during the cooling phase; (2) determine the osmotic effects of dimethylacetamide (DMA), sucrose and trehalose; and (3) investigate the timing and nature of cryoprotectant toxicity. We measured sperm membrane integrity, motility, morphology and egg membrane penetration. In Experiment 1, semen diluted 1:1 with a pre-cooled diluent (5°C) prevented chilling injury. In Experiment 2, semen was diluted with DMA, trehalose or sucrose (300-2400mOsm/L) in deionized water. Only added DMA decreased the percentage of morphologically normal sperm. The percentage of motile sperm was higher with DMA than with the sugars, but membrane intact sperm were comparable amongst all cryoprotectants. As for the osmotic effects, the percentage of membrane intact sperm decreased with 2400mOsm/L and sperm motility decreased with 1200-2400mOsm/L, but sperm morphology was similar at all osmolarities. In Experiment 3, sperm membrane integrity, motility and morphology were comparable at all DMA osmolarities between sperm equilibrated for 0 and 15min, and remained unchanged after removal of DMA. We conclude that: (a) loss of sperm function during the cooling phase can be avoided by using a diluent maintained at 5°C; (b) emu spermatozoa tolerate upto 1400mOsm/L; (c) DMA results in a permanent change in sperm morphology when it is dissolved in deionized water, but does not alter sperm membrane integrity and motility; and (d) equilibration time of sperm with DMA can be less than 10min.
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Affiliation(s)
- S Sood
- UWA Institute of Agriculture, Faculty of Natural and Agricultural Sciences, The University of Western Australia, Crawley, WA 6009, Australia.
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Coloma MA, Gómez-Brunet A, Velázquez R, Toledano-Díaz A, López-Sebastián A, Santiago-Moreno J. Freezability of Iberian ibex (Capra pyrenaica) spermatozoa according to the glycerolization temperature and plasma testosterone concentration. Cryobiology 2010; 61:204-10. [DOI: 10.1016/j.cryobiol.2010.07.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2010] [Revised: 07/03/2010] [Accepted: 07/15/2010] [Indexed: 11/15/2022]
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Damm OS, Cooper TG. Maturation of sperm volume regulation in the rat epididymis. Asian J Androl 2010; 12:578-90. [PMID: 20531277 PMCID: PMC3739377 DOI: 10.1038/aja.2010.50] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 05/09/2010] [Accepted: 05/12/2010] [Indexed: 11/09/2022] Open
Abstract
Sperm maturation in the epididymis may involve differences between mature and immature spermatozoa in their volume regulatory osmolyte response. Spermatozoa obtained from the rat caput and cauda epididymidis were examined for their ability to regulate volume after transfer from in situ epididymal osmolality (measured to be 343 +/- 13 and 365 +/- 19 mmol kg(-1), respectively) to that of the female tract in single- and multiple-step protocols. Cells withstood the single-step treatment better than the multistep protocol. Sperm volume estimates by flow cytometric measurements of forward scatter of cells with intact head membranes was more sensitive than those by assessing cell coiling microscopically. At osmolalites below 210 mmol kg(-1) both caput and cauda cells ruptured, limiting the use of flow cytometry. Above this critical value, the use of quinine showed that both caput and cauda cells could regulate volume, but cauda cells were the more effective. Of several organic osmolytes studied, myo-inositol, glutamate and KCl caused only temporary and slight swelling of spermatozoa cells in hypotonic medium. Spermatozoa of both maturities seemed to use potassium as the preferred osmolyte for regulating volume.
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Affiliation(s)
- Oliver S. Damm
- Centre of Reproductive Medicine and Andrology of the University Münster, D-48149 Münster, Germany
| | - Trevor G. Cooper
- Centre of Reproductive Medicine and Andrology of the University Münster, D-48149 Münster, Germany
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Said TM, Gaglani A, Agarwal A. Implication of apoptosis in sperm cryoinjury. Reprod Biomed Online 2010; 21:456-62. [PMID: 20800544 DOI: 10.1016/j.rbmo.2010.05.011] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 05/13/2010] [Accepted: 05/18/2010] [Indexed: 12/09/2022]
Abstract
Apoptosis is an ongoing physiological phenomenon that has been documented to play a role in male infertility, if deregulated. Caspase activation, externalization of phosphatidylserine, alteration of mitochondrial membrane potential and DNA fragmentation are markers of apoptosis found in ejaculated human spermatozoa. These markers appear in excess in subfertile men and functionally incompetent spermatozoa. Sperm cryopreservation is a widely used procedure in the context of assisted reproductive techniques. Cryopreservation and thawing is a procedure that inflicts irreversible injury on human spermatozoa. The damage is manifested by a decrease in recovery of viable spermatozoa with optimum fertilization potential. This review describes the implication of apoptosis as one of the possible mechanisms involved in sperm cryoinjury. Evidence shows significant increase in some apoptosis markers following cryopreservation and thawing. On the other hand, the increase in sperm DNA fragmentation following cryopreservation and thawing requires further investigation. Specific technical measures should be applied to minimize the induction of apoptosis in human spermatozoa during cryopreservation and thawing. These include standardization of freezing protocols and cryoprotectant use. Selection of non-apoptotic spermatozoa may also prove to be of benefit.
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Affiliation(s)
- Tamer M Said
- The Toronto Institute for Reproductive Medicine - ReproMed, 56 Aberfoyle Crescent, Toronto, ON, Canada M8X2W4
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46
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Maree L, du Plessis SS, Menkveld R, van der Horst G. Morphometric dimensions of the human sperm head depend on the staining method used. Hum Reprod 2010; 25:1369-82. [DOI: 10.1093/humrep/deq075] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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47
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Burnaugh L, Ball B, Sabeur K, Thomas A, Meyers S. Osmotic stress stimulates generation of superoxide anion by spermatozoa in horses. Anim Reprod Sci 2010; 117:249-60. [DOI: 10.1016/j.anireprosci.2009.05.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Revised: 05/08/2009] [Accepted: 05/18/2009] [Indexed: 10/20/2022]
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48
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Czarny N, Harris M, De Iuliis G, Rodger J. Acrosomal integrity, viability, and DNA damage of sperm from dasyurid marsupials after freezing or freeze drying. Theriogenology 2009; 72:817-25. [DOI: 10.1016/j.theriogenology.2009.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Revised: 05/14/2009] [Accepted: 05/18/2009] [Indexed: 10/20/2022]
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49
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Improving viability of cryopreserved honey bee (Apis mellifera L.) sperm with selected diluents, cryoprotectants, and semen dilution ratios. Theriogenology 2009; 72:149-59. [DOI: 10.1016/j.theriogenology.2009.02.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Revised: 02/17/2009] [Accepted: 02/22/2009] [Indexed: 10/21/2022]
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50
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Chen HH, Zhou X, Shu Z, Woods EJ, Gao D. Electrical conductivity measurements for the ternary systems of glycerol/sodium chloride/water and ethylene glycol/sodium chloride/water and their applications in cryopreservation. Biopreserv Biobank 2009; 7:13-8. [PMID: 24845766 DOI: 10.1089/bio.2009.0001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Electrical conductivity of a solution is a property that can be easily determined through the measurement of a conductivity probe. The present study demonstrates the measurements of electrical conductivity for two ternary solutions: glycerol/sodium chloride/water and ethylene glycol/sodium chloride/water. When the concentration of sodium chloride to water ratio (R) is fixed, the existence of either glycerol or ethylene glycol, both cryoprotective agents (CPAs), can be quantitatively determined by their depressive influence on electrical conductivity of the solution. The measurements were performed on solutions with a set of 10 different concentrations of CPAs, ranging from 3.2% to 50% (v/v), along with five ratios of NaCl/water solutions. Equations to fit the experimental measurements were devised to characterize the relations among electrical conductivity, CPAs concentration, and R. A conductivity meter used in this study required <5 s to read the solution's electrical conductivity, which is faster than the measurement using osmometry method. The charts of ternary solutions associated with their electrical conductivity and concentrations make it especially useful for monitoring the cryopreservation processes, including addition and removal of CPAs, to prevent osmotic damages to biological samples.
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Affiliation(s)
- Hsiu-Hung Chen
- Department of Mechanical Engineering, University of Washington, Seattle, Washington
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