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Park JE, Kim MS, Lee E, Lee ST. In vitro maturation using an agarose matrix with incorporated extracellular matrix proteins improves porcine oocyte developmental competence by enhancing cytoplasmic maturation. J Tissue Eng Regen Med 2021; 15:807-817. [PMID: 34310055 DOI: 10.1002/term.3228] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/22/2021] [Accepted: 05/26/2021] [Indexed: 11/09/2022]
Abstract
Here, we present a novel in vitro maturation (IVM) system comprising an agarose matrix supplemented with extracellular matrix (ECM) proteins for enhanced maturation of immature oocytes within cumulus-oocyte complexes (COCs) derived from porcine medium antral follicles (MAFs). Immunocytochemical analyses of integrin subunit α2 , α5 , α6 , β1 , and β4 expression suggested that integrin α2 β1 , α5 β1 , α6 β1 , and α6 β4 play pivotal roles in IVM of porcine immature oocytes. Combinatorial supplementation of fibronectin interacting with integrin α5 β1 , collagen interacting with integrin α2 β1 , and laminin interacting with integrin α6 β1 and α6 β4 to the agarose matrix had no significant effect on nuclear maturation. However, the number of parthenogenetic embryos that developed into blastocysts increased when oocytes were matured using agarose IVM matrices supplemented with fibronectin, collagen, or laminin. Furthermore, significant increases in cytoplasmic maturation-related parameters (BMP15 level, cumulus cell expansion score, intra-oocyte ATP level, and index of cortical granule distribution) were observed in COCs matured in vitro using ECM protein-incorporated agarose matrices. Our data suggest that mature porcine oocytes with enhanced developmental competence and high-quality cytoplasm can be generated via IVM using agarose matrices supplemented with fibronectin, collagen, or laminin.
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Affiliation(s)
- Ji Eun Park
- Department of Animal Life Science, Kangwon National University, Chuncheon, Korea
| | - Min Seong Kim
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
| | - Eunsong Lee
- Institute of Veterinary Science, Kangwon National University, Chuncheon, Korea
| | - Seung Tae Lee
- Department of Animal Life Science, Kangwon National University, Chuncheon, Korea.,Department of Applied Animal Science, Kangwon National University, Chuncheon, Korea.,KustoGen Inc., Chuncheon, Korea
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2
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In vitro maturation on an agarose matrix improves the developmental competence of porcine oocytes. Theriogenology 2020; 157:7-17. [PMID: 32768724 DOI: 10.1016/j.theriogenology.2020.07.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/10/2020] [Accepted: 07/14/2020] [Indexed: 12/24/2022]
Abstract
Oocytes in vivo generally mature in ovarian follicles that are soft, whereas oocytes that mature in vitro are on the hard surface of culture dishes. Embryonic ontogeny through organogenesis has greater ability in in vivo matured oocytes than it does in in vitro matured oocytes, indicating the importance of a soft culture matrix. In this study, we report the effect of using an agarose matrix as a culture substrate on the development of pig oocytes derived from medium antral follicles. The cumulus-oocyte complexes (COCs) retrieved from medium antral follicles were matured on noncoated (control) culture dishes or dishes coated with 1% and 2% (w/v) agarose matrices. Subsequently, the effect of the soft culture matrix on the developmental competence of porcine oocytes was assessed by analyzing cumulus expansion, blastocyst formation after parthenogenetic activation (PA), gene expression levels (ACTN4, BMP15, BAX, HIF1A, PFKP and VEGFA), TUNEL indices, BMP15 protein expression levels, cortical granule (CG) distribution, and intraoocyte ATP levels. In vitro maturation (IVM) of pig COCs using a 1% (w/v) agarose matrix resulted in significantly higher blastocyst formation, cumulus expansion, gene expression of BMP15, HIF1A and VEGFA, protein expression of BMP15, and intraoocyte ATP levels, and there was significantly reduced expression of a pro-apoptotic gene and ACTN4 gene and a reduction in TUNEL indices. These results demonstrate that the developmental competence of porcine oocytes can be effectively improved through IVM on a soft culture matrix made of agarose over what is observed using hard culture dishes.
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3
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Mogas T. Update on the vitrification of bovine oocytes and invitro-produced embryos. Reprod Fertil Dev 2019; 31:105-117. [PMID: 32188546 DOI: 10.1071/rd18345] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The combined use of reproductive technologies, such as transvaginal ovum-pick up and invitro embryo production followed by direct transfer of cryopreserved embryos, has great potential for enhancing genetic selection and optimising cross-breeding schemes in beef and dairy cattle production systems. This, along with an effective cryopreservation procedure for cow oocytes, will enable the long-term conservation of female genetic traits and the advance of embryo biotechnology in this species. However, the low fertilisation rates and developmental competence of cryopreserved oocytes still need to be improved. Over the past two decades, many research efforts tried to overcome individual features of the bovine oocyte that make it notoriously difficult to cryopreserve. In addition, pregnancy rates associated with invitro-produced (IVP) embryos remain lower than those obtained using invivo counterparts. This, together with a lack of a standard methodology for IVP embryo cryopreservation that provides easier and more practical logistics for the transfer of IVP embryos on farms, has hindered international genetic trade and the management of embryo banks. This review updates developments in oocyte and IVP embryo vitrification strategies targeting high production efficiency and better outcomes.
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Affiliation(s)
- Teresa Mogas
- Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Spain. Email
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4
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Loren P, Cheuquemán C, Sánchez E, Risopatrón J, Arias ME, Felmer R, Sánchez R. Effect of short-term exposure of cumulus-oocyte complex to 3-morpholinosydnonimine on in vitro embryo development and gene expression in cattle. Reprod Domest Anim 2016; 51:1010-1019. [PMID: 27644683 DOI: 10.1111/rda.12788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 08/04/2016] [Indexed: 11/28/2022]
Abstract
Short-term exposure of gametes to different types of stress might induce stress tolerance in mammalian embryos. The aim of this study was to evaluate the effect of short-term exposure of bovine mature cumulus-oocyte complex (COC) to 3-morpholinosydnonimine (SIN-1) on subsequent in vitro embryo development, embryo quality and relative gene expression. Matured COCs were incubated with SIN-1 (0, 0.1, 1, 10 and 100 μM SIN-1) for 1 hr before in vitro fertilization and zygotes were cultured until Day 7. The cleavage rate at 72 hr did not show any differences among groups. However, the blastocyst rate on Day 7 decreased with all treatments evaluated, with the embryos generated with 10 μM SIN-1 showing the lowest embryo production rate. Embryo quality analysis did not show any differences in total cell number (TCN) or inner cell mass (ICM) among groups. Relative gene expression analysis showed a downregulation of eNOS expression and an upregulation of nNOS expression in all treatments evaluated compared to the control group. Also, a downregulation was observed in some treatments: SOD2 at 0.1 μM; SOD1 at 0.1 and 100 μM; PRDX5 at 0.1, 10 and 100 μM; and NANOG at 10 and 100 μM; and an upregulation of CDX2 expression was observed at 100 μM. The other genes (OCT4, HIF1A, HSPA1A, BCL2A and iNOS) did not show any differences in the relative gene expression. These results suggest that the short-term exposure of mature bovine COCs to SIN-1 does not induce stress tolerance and has no beneficial effect on bovine in vitro embryo production.
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Affiliation(s)
- P Loren
- Student of Doctoral Program in Sciences major in Applied Cellular and Molecular Biology, Universidad de la Frontera, Temuco, Chile.,Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - C Cheuquemán
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - E Sánchez
- Student of Doctoral Program in Sciences major in Applied Cellular and Molecular Biology, Universidad de la Frontera, Temuco, Chile.,Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - J Risopatrón
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Basic Science, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - M E Arias
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Agricultural and Livestock Production, Faculty of Farming, Livestock and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - R Felmer
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Agricultural and Livestock Production, Faculty of Farming, Livestock and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - R Sánchez
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
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Effect of cortisol on bovine oocyte maturation and embryo development in vitro. Theriogenology 2015; 85:323-9. [PMID: 26456184 DOI: 10.1016/j.theriogenology.2015.08.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 07/25/2015] [Accepted: 08/21/2015] [Indexed: 01/25/2023]
Abstract
Glucocorticoids (GCs) are important mediators of key cellular events. Herein, we investigated the effect of adding cortisol to the IVM medium on the acquisition of developmental competency in bovine oocytes. Cortisol (0.01, 0.1, or 1 μg/mL) had no effect on cleavage rates or cell numbers of resulting blastocysts; however, supplementation with 0.1 μg/mL during IVM increased blastocyst rates of in vitro-fertilized bovine oocytes as compared to untreated controls (41 ± 10% vs. 21 ± 1.2%, P < 0.05, respectively). This concentration was chosen to assess changes in the relative expression of potential GC target genes. Oocytes matured in the presence of cortisol and their corresponding cumulus cells did not show changes in expression for genes analyzed as compared to untreated controls. Notably, blastocysts from oocytes matured in cortisol-supplemented medium expressed higher relative levels of glucose transporter 1 (GLUT1), fatty acid synthase (FASN), and heat shock protein 70 (HSP70). This study supports a role for cortisol in the acquisition of bovine oocyte competence. This is evidenced by increased blastocyst development rates and presumably related to elevated embryonic transcripts with roles in glucose and lipid metabolism, as well as the cellular response to stress.
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Arcarons N, Morató R, Spricigo JFW, Ferraz MAMM, Mogas T. Spindle configuration and developmental competence of in vitro-matured bovine oocytes exposed to NaCl or sucrose prior to Cryotop vitrification. Reprod Fertil Dev 2015; 28:RD14516. [PMID: 25897945 DOI: 10.1071/rd14516] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Accepted: 02/26/2015] [Indexed: 11/23/2022] Open
Abstract
In the present study we examined whether exposure to high concentrations of NaCl or sucrose before vitrification improves the cryotolerance of in vitro-matured bovine oocytes. In Experiment 1, oocytes were exposed to different concentrations of NaCl (375-1517 mOsm) or sucrose (375-812 mOsm) for 1h. On the basis of the results of this experiment, in Experiment 2 oocytes were exposed to 0.25% NaCl (375 mOsmol) or 2.77% sucrose (375 mOsmol) solution, vitrified and warmed. Microtubule and chromosome configurations were examined by immunocytochemistry. In Experiment 3, in vitro embryo development was assessed after vitrification of oocytes with or without 2.77% sucrose (375 mOsmol) pretreatment. There was a similar percentage of oocytes showing normal spindle configurations in the sucrose-pretreated and control groups. Higher rates of abnormal spindles were found in groups treated with NaCl or sucrose solutions with >375 mOsmol. After vitrification and warming, a significantly higher percentage of oocytes with normal chromosome configurations was recorded for oocytes exposed to 375 mOsmol sucrose solution before vitrification compared with the control vitrified oocytes. However, these percentages were significantly lower than those recorded in untreated controls. Cleavage and blastocyst rates were higher in non-vitrified than vitrified oocytes. In conclusion, pretreatment with 375 mOsmol NaCl or sucrose solution had no adverse effects on the spindle status of vitrified-warmed cow oocytes. However, sucrose pretreatment offered no benefits for embryo development.
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7
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Lin L, Luo Y, Sørensen P, Prætorius H, Vajta G, Callesen H, Pribenszky C, Bolund L, Kristensen TN. Effects of high hydrostatic pressure on genomic expression profiling of porcine parthenogenetic activated and cloned embryos. Reprod Fertil Dev 2015; 26:469-84. [PMID: 24618454 DOI: 10.1071/rd13037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Accepted: 03/08/2013] [Indexed: 12/31/2022] Open
Abstract
Handmade cloning (HMC) has been used to generate transgenic pigs for biomedical research. Recently, we found that parthenogenetic activation (PA) of porcine oocytes and improved HMC efficiency could be achieved by treatment with sublethal high hydrostatic pressure (HHP). However, the molecular mechanism underlying the effects of HHP treatment on embryonic development is poorly understood and so was investigated in the present study. Thus, in the present study, we undertook genome-wide gene expression analysis in HHP-treated and untreated oocytes, as well as in 4-cell and blastocyst stage embryos derived by PA or HMC. Hierarchical clustering depicted stage-specific genomic expression profiling. At the 4-cell and blastocyst stages, 103 and 163 transcripts were differentially expressed between the HMC and PA embryos, respectively (P<0.05). These transcripts are predominantly involved in regulating cellular differentiation, gene expression and cell-to-cell signalling. We found that 44 transcripts were altered by HHP treatment, with most exhibiting lower expression in HHP-treated oocytes. Genes involved in embryonic development were prominent among the transcripts affected by HHP. Two of these genes (INHBB and ME3) were further validated by quantitative reverse transcription-polymerase chain reaction. We also observed that HHP treatment activated expression of the imprinting gene DLX5 in 4-cell PA embryos. In conclusion, our genomic expression profiling data suggest that HHP alters the RNA constitution in porcine oocytes and affects the expression of imprinting genes during embryonic development.
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Affiliation(s)
- Lin Lin
- Department of Biomedicine, Aarhus University, Wilhelm Meyer Alle 4, 8000, Aarhus C, Denmark
| | - Yonglun Luo
- Department of Biomedicine, Aarhus University, Wilhelm Meyer Alle 4, 8000, Aarhus C, Denmark
| | - Peter Sørensen
- Department of Animal Science, Aarhus University, Blichers Alle 20, 8830, Tjele, Denmark
| | - Helle Prætorius
- Department of Biomedicine, Aarhus University, Wilhelm Meyer Alle 4, 8000, Aarhus C, Denmark
| | - Gabor Vajta
- BGI/HuaDa, Beishan Road 10, 518000, Shenzhen, China
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Blichers Alle 20, 8830, Tjele, Denmark
| | - Csaba Pribenszky
- Department of Animal Breeding and Genetics, Szent István University, István u. 2, Budapest, 1078, Hungary
| | - Lars Bolund
- Department of Biomedicine, Aarhus University, Wilhelm Meyer Alle 4, 8000, Aarhus C, Denmark
| | - Torsten Nygård Kristensen
- Department of Molecular Biology and Genetics, Center for Quantitative Genetics and Genomics, Aarhus University, Blichers Alle 20, 8830, Tjele, Denmark
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8
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IVF outcome in women with accidental contamination of follicular fluid with endometrioma content. Eur J Obstet Gynecol Reprod Biol 2014; 181:130-4. [DOI: 10.1016/j.ejogrb.2014.07.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 07/24/2014] [Accepted: 07/29/2014] [Indexed: 11/22/2022]
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9
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Lee J, Lee Y, Park B, Elahi F, Jeon Y, Hyun SH, Lee E. Developmental competence of IVM pig oocytes after SCNT in relation to the shrinkage pattern induced by hyperosmotic treatment. Theriogenology 2014; 81:974-81. [DOI: 10.1016/j.theriogenology.2014.01.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 01/15/2014] [Accepted: 01/22/2014] [Indexed: 11/15/2022]
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10
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Hirose M, Kamoshita M, Fujiwara K, Kato T, Nakamura A, Wojcikiewicz RJH, Parys JB, Ito J, Kashiwazaki N. Vitrification procedure decreases inositol 1,4,5-trisphophate receptor expression, resulting in low fertility of pig oocytes. Anim Sci J 2013; 84:693-701. [PMID: 23607492 DOI: 10.1111/asj.12061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 01/30/2013] [Indexed: 01/25/2023]
Abstract
Although cryopreservation of mammalian oocytes is an important technology, it is well known that unfertilized oocytes, especially in pigs, are highly sensitive to low temperature and that cryopreserved oocytes show low fertility and developmental ability. The aim of the present study was to clarify why porcine in vitro matured (IVM) oocytes at the metaphase II (MII) stage showed low fertility and developmental ability after vitrification. In vitro matured cumulus oocyte complexes (COCs) were vitrified with Cryotop and then evaluated for fertility through in vitro fertilization (IVF). Although sperm-penetrated oocytes were observed to some extent (30-40%), the rate of pronuclear formation was low (9%) and none of them progressed to the two-cell stage. The results suggest that activation ability of cryopreserved oocytes was decreased by vitrification. We examined the localization and expression level of the type 1 inositol 1,4,5 trisphosphate receptor (IP3 R1), the channel responsible for Ca(2+) release during IVF in porcine oocytes. Localization of IP3 R1 close to the plasma membrane and total expression level of IP3 R1 protein were both decreased by vitrification. In conclusion, our present study indicates that vitrified-warmed porcine COCs showed a high survival rate but low fertility after IVF. This low fertility seems to be due to the decrease in IP3 R1 by the vitrification procedure.
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Affiliation(s)
- Masahiko Hirose
- Laboratory of Animal Reproduction, Graduate School of Veterinary Sciences, Sagamihara, Japan
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11
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A chronologic review of mature oocyte vitrification research in cattle, pigs, and sheep. Theriogenology 2012; 78:1709-19. [DOI: 10.1016/j.theriogenology.2012.06.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 05/28/2012] [Accepted: 05/30/2012] [Indexed: 11/21/2022]
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12
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Pribenszky C, Lin L, Du Y, Losonczi E, Dinnyes A, Vajta G. Controlled Stress Improves Oocyte Performance - Cell Preconditioning in Assisted Reproduction. Reprod Domest Anim 2012; 47 Suppl 4:197-206. [DOI: 10.1111/j.1439-0531.2012.02076.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Luo Y, Lin L, Bolund L, Jensen TG, Sørensen CB. Genetically modified pigs for biomedical research. J Inherit Metab Dis 2012; 35:695-713. [PMID: 22453682 DOI: 10.1007/s10545-012-9475-0] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/09/2012] [Accepted: 03/02/2012] [Indexed: 01/17/2023]
Abstract
During the last two decades, pigs have been used to develop some of the most important large animal models for biomedical research. Advances in pig genome research, genetic modification (GM) of primary pig cells and pig cloning by nuclear transfer, have facilitated the generation of GM pigs for xenotransplantation and various human diseases. This review summarizes the key technologies used for generating GM pigs, including pronuclear microinjection, sperm-mediated gene transfer, somatic cell nuclear transfer by traditional cloning, and somatic cell nuclear transfer by handmade cloning. Broadly used genetic engineering tools for porcine cells are also discussed. We also summarize the GM pig models that have been generated for xenotransplantation and human disease processes, including neurodegenerative diseases, cardiovascular diseases, eye diseases, bone diseases, cancers and epidermal skin diseases, diabetes mellitus, cystic fibrosis, and inherited metabolic diseases. Thus, this review provides an overview of the progress in GM pig research over the last two decades and perspectives for future development.
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Affiliation(s)
- Yonglun Luo
- Department of Biomedicine, Aarhus University, Aarhus C, Denmark.
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14
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Vajta G, Callesen H. Establishment of an efficient somatic cell nuclear transfer system for production of transgenic pigs. Theriogenology 2012; 77:1263-74. [DOI: 10.1016/j.theriogenology.2011.10.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 10/28/2011] [Accepted: 10/30/2011] [Indexed: 10/14/2022]
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15
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Pribenszky C, Horváth A, Végh L, Huang SY, Kuo YH, Szenci O. Stress preconditioning of boar spermatozoa: a new approach to enhance semen quality. Reprod Domest Anim 2011; 46 Suppl 2:26-30. [PMID: 21639865 DOI: 10.1111/j.1439-0531.2011.01812.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Semen preparation and cryopreservation require finely adjusted procedures. Gametes are sensitive to environmental stresses, so in vitro procedures aim to minimize the inevitable harmful conditions. Applying stress to precondition cells has only been investigated recently. Studies demonstrated that by utilizing a well defined and properly applied hydrostatic pressure (HP) stress treatment to spermatozoa before in vitro storage, cryopreservation or insemination, cell survival and fertility improved compared with untreated controls. The birth of healthy piglets from treated fresh or frozen-thawed semen demonstrates the in vivo safety of the procedure. Although the biological mechanism is still unclear, several processes incorporating cellular stress response might explain the observations. This paper summarizes results, background, aspects and considerations of HP treatment for porcine semen. The new principle, i.e. to improve the stress tolerance by a defined sublethal stress may outline a new strategy in assisted reproductive technologies with unique theoretical and practical consequences.
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Affiliation(s)
- C Pribenszky
- Faculty of Veterinary Science, Szent István University, Budapest, Hungary.
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16
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Pribenszky C, Vajta G. Cells under pressure: how sublethal hydrostatic pressure stress treatment increases gametes' and embryos' performance. Reprod Fertil Dev 2011; 23:48-55. [DOI: 10.1071/rd10231] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The principal approach in in vitro embryo culture and manipulation has been a defensive one: procedures aim to satisfy passively the supposed or real physiological needs of gametes and embryos. Similarly, during cryopreservation the aim is to cause minimal damage to cells whilst attempting to obtain the highest achievable cell survival. However, carefully chosen and precisely controlled sublethal stress treatment of cells has been described to improve embryos’ and gametes’ performance, and, as a consequence, subsequent morphological survival, fertilisation, in vitro development, pregnancy and farrowing rates improved considerably compared with untreated controls. This review summarises studies that open up a new approach: instead of – and besides – trying to passively reduce the harm to cells during in vitro manipulations and culture, procedures may also prepare the cells themselves to ward off or reduce the damage by turning up the cells’ own, inner capacities.
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17
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Pribenszky C, Vajta G, Molnar M, Du Y, Lin L, Bolund L, Yovich J. Stress for Stress Tolerance? A Fundamentally New Approach in Mammalian Embryology1. Biol Reprod 2010; 83:690-7. [DOI: 10.1095/biolreprod.110.083386] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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18
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Lin L, Pribenszky C, Molnár M, Kragh PM, Du Y, Zhang X, Yang H, Bolund L, Callesen H, Macháty Z, Vajta G. High Hydrostatic Pressure Treatment of Porcine Oocytes Induces Parthenogenetic Activation. Cell Reprogram 2010; 12:475-80. [DOI: 10.1089/cell.2009.0115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Lin Lin
- Department of Genetics and Biotechnology, Aarhus University, Tjele, Denmark
- Institute of Human Genetics, Aarhus University, Aarhus, Denmark
- BGI/HuaDa Shenzhen, Shenzhen, People's Republic of China
| | - Csaba Pribenszky
- Clinic for Large Animals, Faculty of Veterinary Science, Szent István University, Üllő, Dóra major, Hungary
| | - Miklós Molnár
- Clinic for Large Animals, Faculty of Veterinary Science, Szent István University, Üllő, Dóra major, Hungary
| | - Peter M Kragh
- Department of Genetics and Biotechnology, Aarhus University, Tjele, Denmark
| | - Yutao Du
- BGI/HuaDa Shenzhen, Shenzhen, People's Republic of China
| | - Xiuqing Zhang
- BGI/HuaDa Shenzhen, Shenzhen, People's Republic of China
| | - Huanming Yang
- BGI/HuaDa Shenzhen, Shenzhen, People's Republic of China
| | - Lars Bolund
- Institute of Human Genetics, Aarhus University, Aarhus, Denmark
- BGI/HuaDa Shenzhen, Shenzhen, People's Republic of China
| | - Henrik Callesen
- Department of Genetics and Biotechnology, Aarhus University, Tjele, Denmark
| | - Zoltán Macháty
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Gábor Vajta
- Department of Genetics and Biotechnology, Aarhus University, Tjele, Denmark
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19
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Vajta G, Rienzi L, Cobo A, Yovich J. Embryo culture: can we perform better than nature? Reprod Biomed Online 2009; 20:453-69. [PMID: 20202911 DOI: 10.1016/j.rbmo.2009.12.018] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 07/20/2009] [Accepted: 12/09/2009] [Indexed: 11/27/2022]
Abstract
Culture of preimplantation-stage embryos has always been a key element of laboratory embryology and has contributed substantially to the success of many assisted reproduction procedures. During the past decade, its importance has increased as extended in-vitro embryo culture and single blastocyst transfer have become indispensable parts of the approach to decreasing the chance of multiple pregnancy while preserving the overall efficiency of the treatment. However, in spite of the scientific and commercial challenge stimulating research worldwide to optimize embryo culture conditions, a consensus is missing even in the basic principles, including composition and exchange of media, the required physical and biological environment and even the temperature of incubation. This review attempts to summarize the controversies, demonstrate the fragility of some widely accepted dogmas and generate an open-minded debate towards rapid and efficient optimization. New approaches expanding the traditional frames of mammalian embryo culture are also discussed. Although some researchers suppose that the efficiency of the presently applied in-vitro culture systems have already approached the biological limits, authors are confident that substantial improvement may be achieved that may expand considerably the possibilities of future assisted reproduction in humans.
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Affiliation(s)
- Gábor Vajta
- Cairns Fertility Centre, Cairns, QLD 4870, Australia.
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