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Stachurski P, Świątkowski W, Ciszewski A, Sarna-Boś K, Michalak A. A Short Review of the Toxicity of Dentifrices-Zebrafish Model as a Useful Tool in Ecotoxicological Studies. Int J Mol Sci 2023; 24:14339. [PMID: 37762640 PMCID: PMC10531698 DOI: 10.3390/ijms241814339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/12/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023] Open
Abstract
This review aims to summarize the literature data regarding the effects of different toothpaste compounds in the zebrafish model. Danio rerio provides an insight into the mechanisms of the ecotoxicity of chemicals as well as an assessment of their fate in the environment to determine long-term environmental impact. The regular use of adequate toothpaste with safe active ingredients possessing anti-bacterial, anti-inflammatory, anti-oxidant, and regenerative properties is one of the most effective strategies for oral healthcare. In addition to water, a typical toothpaste consists of a variety of components, among which three are of predominant importance, i.e., abrasive substances, fluoride, and detergents. These ingredients provide healthy teeth, but their environmental impact on living organisms are often not well-known. Each of them can influence a higher level of organization: subcellular, cellular, tissue, organ, individual, and population. Therefore, it is very important that the properties of a chemical are detected before it is released into the environment to minimize damage. An important part of a chemical risk assessment is the estimation of the ecotoxicity of a compound. The zebrafish model has unique advantages in environmental ecotoxicity research and has been used to study vertebrate developmental biology. Among others, the advantages of this model include its external, visually accessible development, which allows for providing many experimental manipulations. The zebrafish has a significant genetic similarity with other vertebrates. Nevertheless, translating findings from zebrafish studies to human risk assessment requires careful consideration of these differences.
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Affiliation(s)
- Piotr Stachurski
- Department of Paediatric Dentistry, Medical University of Lublin, 20-059 Lublin, Poland
| | - Wojciech Świątkowski
- Department of Oral Surgery, Medical University of Lublin, 20-059 Lublin, Poland;
| | - Andrzej Ciszewski
- Department of Paediatric Orthopaedics and Rehabilitation, Medical University of Lublin, 20-093 Lublin, Poland;
| | - Katarzyna Sarna-Boś
- Department of Dental Prosthetics, Medical University of Lublin, 20-059 Lublin, Poland;
| | - Agnieszka Michalak
- Independent Laboratory of Behavioral Studies, Medical University of Lublin, 20-059 Lublin, Poland;
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2
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Hydrogel encapsulation as a handling and vitrification tool for zebrafish ovarian tissue. Theriogenology 2023; 198:153-163. [PMID: 36586353 DOI: 10.1016/j.theriogenology.2022.12.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/10/2022] [Accepted: 12/11/2022] [Indexed: 12/25/2022]
Abstract
Zebrafish is an important animal model, thousands lines have been developed, thus having a great need for their preservation. However, the cryopreservation of fish oocytes is still limited and needs improvement. The sodium alginate hydrogel, in addition to providing support for the cells, has been shown to be a potential cryoprotectant. Therefore, the aim of this study was to evaluate the sodium alginate hydrogel encapsulation technique efficiency during zebrafish ovarian tissue vitrification. The encapsulation methodology was standardized in the first experiment. In Experiment 2, we evaluated four vitrified groups: standard protocol without encapsulation (VS); encapsulated with cryoprotectants (VS1-A); encapsulated with half the cryoprotectants concentration (VS2-A); encapsulated without cryoprotectants (VA). VS treatment (54.6 ± 12.3%; 23.7 ± 9.9%; 12.6 ± 5.0%) did not differ from the VS1-A and VA showed a lower membrane integrity percentage (1.2 ± 1.4%; 0.3 ± 0.6%; 0.5 ± 1.5%). Mitochondrial activity was significantly greater in non-encapsulated treatment (VS) when compared to the encapsulated treatments. VS1-A and VS obtained the lowest lipid peroxidation (39.4 ± 4.4 and 40.5 ± 3.3 nmol MDA/mg respectively) in which VS was not significantly different from the VS2-A treatment (63.6 ± 3.1 nmol MDA/mg), unlike, VA obtained the highest lipid peroxidation level (124.7 ± 7.9 nmol MDA/mg). The results obtained in this study demonstrate that the sodium alginate hydrogel encapsulation technique did not have a cryoprotective action, but maintained the membrane integrity when used the standard concentration of cryoprotectants. However, halving the cryoprotectant concentration of fragments encapsulated in alginate hydrogel did not cause an increase in lipid peroxidation. In addition, it provided support and prevented the oocytes from loosening from the tissue during the vitrification process, being an interesting alternative for later in vitro maturation.
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Santos Marques L, Rodrigues de Freitas T, Batista Rodrigues R, Dos Santos Teixeira N, Pérez-Atehortúa M, Rosa-Silva HT, Fonseca Moreira JC, Streit DP. Vitrification protocol for immature Brycon orbignyanus ovarian tissue as an extinction escape strategy. Cryobiology 2021; 103:116-122. [PMID: 34464611 DOI: 10.1016/j.cryobiol.2021.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 08/23/2021] [Accepted: 08/26/2021] [Indexed: 11/18/2022]
Abstract
Piracanjunba (Brycon orbignyanus) is an endangered South American fish, and ovarian tissue cryopreservation is an alternative method for preserving maternal germplasm and genetic diversity. Therefore, our aim was to test a vitrification protocol for ovarian tissue containing primary growth (PG) oocytes of B. orbignyanus as a strategy to avoid the threat of extinction. Two vitrification solutions were evaluated (VS1: 1.5 M methanol + 4.5 M propylene glycol and VS2: 1.5 M methanol + 5.5 M Me2SO) and compared using control/fresh ovarian tissue. After vitrification, the following factors were analyzed: membrane integrity using trypan blue, morphology using a histological assessment, oxidative stress (total reactive antioxidant potential (TRAP) and reduced thiol [-SH]), mitochondrial activity using MTT, and DNA damage using a comet assay. The vitrified oocytes (VS1= 24.3 ± 0.49% and VS2= 24.8 ± 0.69%) showed higher DNA damage than the control group (control= 20.7 ± 1.03%) (P = 0.004). In contrast, in most evaluations (membrane integrity, membrane damage, oxidative stress, and mitochondrial activity), there were no discernible differences between the control group and the vitrified samples. In addition, oocyte (P = 0.883) and nuclear diameter (P = 0.118) did not change after vitrification. VS2 treatment resulted in higher nuclear damage (15.7 ± 1.45%) than in the control treatment (3.5 ± 1.19%); however, VS1 treatment did not result in significantly more damage (9.5 ± 3.01%) than in the control (P = 0.015). Therefore, the protocol for ovarian tissue vitrification tested in this study resulted in high maintenance of PG oocyte cell integrity, making it a promising alternative for B. orbignyanus maternal genome preservation.
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Affiliation(s)
- Lis Santos Marques
- Animal Science Research Program of Federal University of Rio Grande Do Sul, Bento Gonçalves, 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Thaiza Rodrigues de Freitas
- Animal Science Research Program of Federal University of Rio Grande Do Sul, Bento Gonçalves, 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Rômulo Batista Rodrigues
- Animal Science Research Program of Federal University of Rio Grande Do Sul, Bento Gonçalves, 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Nathalia Dos Santos Teixeira
- Animal Science Research Program of Federal University of Rio Grande Do Sul, Bento Gonçalves, 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Maritza Pérez-Atehortúa
- Animal Science Research Program of Federal University of Rio Grande Do Sul, Bento Gonçalves, 7712, 91540-000, Porto Alegre, RS, Brazil
| | - H T Rosa-Silva
- Postgraduate Program in Biological Sciences: Biochemistry, Department of Biochemistry of Federal University of Rio Grande Do Sul, Ramiro Barcelos, 2600, 90035-003, Porto Alegre, RS, Brazil
| | - José Cláudio Fonseca Moreira
- Postgraduate Program in Biological Sciences: Biochemistry, Department of Biochemistry of Federal University of Rio Grande Do Sul, Ramiro Barcelos, 2600, 90035-003, Porto Alegre, RS, Brazil
| | - Danilo Pedro Streit
- Animal Science Research Program of Federal University of Rio Grande Do Sul, Bento Gonçalves, 7712, 91540-000, Porto Alegre, RS, Brazil.
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Sevryugin VA, Loskutov VV, Kosova GN. Regularities of Conductivity of Aqueous Molecular Solutions. RUSS J ELECTROCHEM+ 2020. [DOI: 10.1134/s1023193519120152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Lopes TDS, Sanches EA, Caneppele D, Silveira MM, Romagosa E. Chilling sensitivity of Steindachneridion parahybae (Siluriformes: Pimelodidae) oocytes in different cryoprotectants. Vet Anim Sci 2019; 7:100046. [PMID: 32734068 PMCID: PMC7386759 DOI: 10.1016/j.vas.2019.100046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 12/28/2018] [Accepted: 01/02/2019] [Indexed: 11/29/2022] Open
Abstract
The viability of post-thaw fish oocytes can be affected by different stages of the freezing process, such as cryoprotectant toxicity, cold sensitivity, freezing curves and thawing. Therefore, these steps need to be investigated for the development of a protocol. In the present study, the aim was to investigate chilling sensitivity at different oocyte stages of Steindachneridion parahybae. Immature and mature oocytes were incubated in Hanks' or 90% L15 solutions containing different CPAs (cryoprotectant solutions) per experiment: (1) 0.1-0.4 M sucrose + 1-2 M methanol and (2) 1-4 M methanol X 1-4 M propylene glycol X 1-4 M DMSO for mature oocytes; (3) 0.5 M sucrose or fructose + 2 M methanol or PG or DMSO and (4) 0.25-1 M fructose + 1-4 M DMSO for immature oocytes. All treatments were kept for 120 min at -5.9 ± 2.8°C. For the control treatment, only Hanks' or 90% L15 solutions were carried out. Evaluations were made by viability tests: membrane integrity staining in 0.4% Trypan blue (TB) and fertilization rate (%F) sole for mature oocytes. Results presented that mature oocytes were the most sensitive to lower temperatures, because there was no %F. All cryoprotectants tested in the different concentrations can be used for immature oocytes, however the statistically superior cryoprotectant was CPA with fructose and DMSO, with the low concentration of this CPA being was the best statistically. This may indicate that for this species the immature stages have presented a lower chilling sensitivity than the mature stages.
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Affiliation(s)
- Tais da Silva Lopes
- Fishery Institute, APTA, SAA. São Paulo, SP, Brazil. Av. Francisco Matarazzo, 455, Água Branca, 05001-970, São Paulo, SP, Brazil
| | | | - Danilo Caneppele
- Hydrobiology and Aquaculture Station of CESP (São Paulo Energy Company), Paraibuna, SP, Brazil
| | | | - Elizabeth Romagosa
- Fishery Institute, APTA, SAA. São Paulo, SP, Brazil. Av. Francisco Matarazzo, 455, Água Branca, 05001-970, São Paulo, SP, Brazil
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6
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Effect of vitrification solutions on survival rate of cryopreserved Epinephelus moara embryos. Theriogenology 2018; 113:183-191. [DOI: 10.1016/j.theriogenology.2018.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 03/09/2018] [Accepted: 03/11/2018] [Indexed: 01/17/2023]
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7
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Jalali F, DiBenedetto AJ, Karlsson JOM. Chilling causes perivitelline granule formation in activated zebrafish oocytes. Cryobiology 2018; 81:210-213. [PMID: 29407225 DOI: 10.1016/j.cryobiol.2018.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 01/24/2018] [Accepted: 01/28/2018] [Indexed: 10/18/2022]
Abstract
Chilling sensitivity in oocytes of the zebrafish represents a potential obstacle to their successful cryopreservation. Here, we report the first cryomicroscopic observations of the response of zebrafish oocytes to chilling conditions. In activated stage V oocytes that had been exposed to hypothermic temperatures, we observed a latent effect of chilling, manifesting as a granular precipitate that appeared in the perivitelline fluid upon return to 28.5 °C. The granules were visible in unstained oocytes under transmitted light microscopy, and the resulting perivitelline turbidity increased in a dose-dependent manner with decreasing chilling temperature (p < 0.001), as well as with increasing time of hypothermic exposure (p < 0.0001). The change in appearance of the perivitelline space in oocytes that had been chilled and rewarmed became statistically significant after a 7-min exposure to 10 °C and after only 30 s at 1 °C (p < 0.05). Thus, even moderate chilling exposures can lead to detectable changes in activated zebrafish oocytes.
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Affiliation(s)
- Fatemeh Jalali
- Department of Biology, Villanova University, Villanova, PA 19085, USA
| | | | - Jens O M Karlsson
- Department of Mechanical Engineering, Villanova University, Villanova, PA 19085, USA.
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8
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Silva LA, Marques LS, Zhang T, Rodrigues RB, Eloy LR, Streit DP. Production of live larvae following in vitro maturation of zebrafish oocytes. Theriogenology 2018; 105:115-119. [PMID: 28950168 DOI: 10.1016/j.theriogenology.2017.09.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 09/12/2017] [Accepted: 09/17/2017] [Indexed: 11/26/2022]
Abstract
This study aimed to assess the effects of carp pituitary extract (CPE), follicle stimulating hormone (FSH) and luteinizing hormone (LH) on zebrafish oocyte maturation and the ability of these mature oocytes to be fertilized and developed until hatching. Stage III follicles were matured in eight treatments: five concentrations of CPE (16, 32, 48, 64 and 80 μg/mL), one of FSH (0.5 μg/mL), one of LH (0.5 μg/mL), or one combination of FSH (0.5 μg/mL) and LH (0.5 μg/mL). Maturation rates in CPE treatments were 12.8% (16 μg/mL), 24.8% (32 μg/mL), 27.0% (48 μg/mL), 22.7% (64 μg/mL) and 9.6% (80 μg/mL); in FSH was 15.7% (0.5 μg/mL), in LH was 31.8% (0.5 μg/mL) and in FSH (0.5 μg/mL) combined with LH (0.5 μg/mL) it was 50.4%. In vitro fertilization was performed in all treatments; however, only the treatment combining FSH and LH resulted in fertilized oocytes. After maturation using FSH combined with LH, the cleavage rate was 33.3% and hatching rate of live larvae was 20.0%. These results showed that FSH combined with LH was effective in IVM of zebrafish oocyte.
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Affiliation(s)
- Laura A Silva
- Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91540-000, Brazil
| | - Lis S Marques
- Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91540-000, Brazil.
| | - Tiantian Zhang
- Faculty of Science and Technology, Bournemouth University, Dorset, BH12 5BB, UK
| | - Rômulo B Rodrigues
- Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91540-000, Brazil
| | - Lidiane Raquel Eloy
- Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91540-000, Brazil
| | - Danilo P Streit
- Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91540-000, Brazil
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Abstract
Many biotechnologies are currently used in livestock breeding with the aim of improving reproductive efficiency and increasing the rate of genetic progress in production animals. Semen cryopreservation is the most widely used cryobiotechnology, although vitrification techniques now allow embryos and oocytes to be banked in ever-increasing numbers. Cryopreservation of other types of germplasm (reproductive tissue in general) is also possible, although the techniques are still in the early stages of development for use in livestock species. Although still in their infancy, these techniques are increasingly being used in aquaculture. Germplasm conservation enables reproductive tissues from both animals and fish to be preserved to generate offspring in the future without having to maintain large numbers of living populations of these species. However, such measures need careful planning and coordination. This review explains why the preservation of genetic diversity is needed for livestock and fish, and describes some of the issues involved in germplasm banking. Furthermore, some recent developments in semen handling leading to improved semen cryopreservation and biosecurity measures are also discussed.
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Puschmann E, Selden C, Butler S, Fuller B. Liquidus Tracking: Large scale preservation of encapsulated 3-D cell cultures using a vitrification machine. Cryobiology 2017; 76:65-73. [DOI: 10.1016/j.cryobiol.2017.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 04/15/2017] [Accepted: 04/19/2017] [Indexed: 12/28/2022]
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Asturiano JF, Cabrita E, Horváth Á. Progress, challenges and perspectives on fish gamete cryopreservation: A mini-review. Gen Comp Endocrinol 2017; 245:69-76. [PMID: 27318279 DOI: 10.1016/j.ygcen.2016.06.019] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 06/10/2016] [Accepted: 06/11/2016] [Indexed: 10/21/2022]
Abstract
Protocols for the cryopreservation of fish gametes have been developed for many different fish species, in special, freshwater salmonids and cyprinids. Methods for sperm freezing have progressed during the last decades due to the increasing number of potential applications: aquaculture (genetic improvement programs, broodstock management, helping with species having reproductive problems), biotechnology studies using model fish species (preservation of transgenic or mutant lines), cryobanking of genetic resources from endangered species, etc. This mini-review tries to give an overview of the present situation of this area of research, identifying the main challenges and perspectives, redirecting the reader to more in-depth reviews and papers.
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Affiliation(s)
- Juan F Asturiano
- Grupo de Acuicultura y Biodiversidad, Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Camino de Vera s/n 46022, Valencia, Spain.
| | - Elsa Cabrita
- CCMAR, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal.
| | - Ákos Horváth
- Department of Aquaculture, Szent István University, 2100 Gödöllő, Páter Károly u. 1., Hungary.
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Martínez-Páramo S, Horváth Á, Labbé C, Zhang T, Robles V, Herráez P, Suquet M, Adams S, Viveiros A, Tiersch TR, Cabrita E. Cryobanking of aquatic species. AQUACULTURE (AMSTERDAM, NETHERLANDS) 2017; 472:156-177. [PMID: 29276317 PMCID: PMC5737826 DOI: 10.1016/j.aquaculture.2016.05.042] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This review is focused on the applications of genome cryobanking of aquatic species including freshwater and marine fish, as well as invertebrates. It also reviews the latest advances in cryobanking of model species, widely used by the scientific community worldwide, because of their applications in several fields. The state of the art of cryopreservation of different cellular types (sperm, oocytes, embryos, somatic cells and primordial germ cells or early spermatogonia) is discussed focusing on the advantages and disadvantages of each procedure according to different applications. A special review on the need of standardization of protocols has also been carried out. In summary, this comprehensive review provides information on the practical details of applications of genome cryobanking in a range of aquatic species worldwide, including the cryobanks established in Europe, USA, Brazil, Australia and New Zealand, the species and type of cells that constitute these banks and the utilization of the samples preserved. STATEMENT OF RELEVANCE This review compiles the last advances on germplasm cryobanking of freshwater and marine fish species and invertebrates, with high value for commercial aquaculture or conservation. It is reviewed the most promising cryopreservation protocols for different cell types, embryos and larvae that could be applied in programs for genetic improvement, broodstock management or conservation of stocks to guarantee culture production.
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Affiliation(s)
- Sonia Martínez-Páramo
- CCMAR-Centre of Marine Sciences, University of Algarve, Campus Gambelas, 8005-139 Faro, Portugal
| | - Ákos Horváth
- Department of Aquaculture, Szent István University, H-2100 Gödöllő, Hungary
| | - Catherine Labbé
- INRA, Fish Physiology and Genomics, Campus de Beaulieu, F-35000 Rennes, France
| | - Tiantian Zhang
- Faculty of Science and Technology, Bournemouth University, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB, United Kingdom
| | - Vanesa Robles
- IEO, Spanish Oceanographic Institute, Santander Oceanographic Centre, El Bocal, Barrio Corbanera s/n Bocal, 39012 Monte, Santander, Spain
| | - Paz Herráez
- Department of Molecular Biology and INDEGSAL, University of León, 24071 León, Spain
| | - Marc Suquet
- IFREMER, PFOM Dept, Stn Expt Argenton, UMR, 6539 Argenton, France
| | - Serean Adams
- Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand
- AgResearch, Private Bag 3123, Ruakura, Hamilton 3240, New Zealand
| | - Ana Viveiros
- Department of Animal Sciences, Federal University of Lavras, UFLA, MG 37200-000, Brazil
| | - Terrence R. Tiersch
- Aquatic Germplasm and Genetic Resources Center, School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
| | - Elsa Cabrita
- CCMAR-Centre of Marine Sciences, University of Algarve, Campus Gambelas, 8005-139 Faro, Portugal
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Marques LS, Bos-Mikich A, Godoy LC, Silva LA, Maschio D, Zhang T, Streit DP. Viability of zebrafish (Danio rerio) ovarian follicles after vitrification in a metal container. Cryobiology 2015; 71:367-73. [DOI: 10.1016/j.cryobiol.2015.09.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 07/25/2015] [Accepted: 09/09/2015] [Indexed: 11/16/2022]
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Recent advances and prospects in germplasm preservation of rare and endangered species. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 753:331-56. [PMID: 25091916 DOI: 10.1007/978-1-4939-0820-2_14] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Fertility preservation strategies using cryopreservation have enormous potential for helping sustain and protect rare and endangered species, especially to assist managing or 'rescuing' the genomes of genetically valuable individuals. However, wide-scale applications are still limited by significant physiological variations among species and a sheer lack of fundamental knowledge about basic reproductive traits as well as in germplasm cryobiology. Cryo-studies have been conducted in more species (mainly vertebrates) in the recent years but a vast majority still remains un-studied. Semen cryopreservation represents the most extensive effort with live births reported in more and more species after artificial insemination. Oocyte freezing remains challenging and unsuccessful in wild species and will require more research before becoming a standard procedure. As an alternative to fully grown gametes, gonadal tissue preservation has become a promising option in vertebrates. Yet, more fertility preservation options are necessary to save species so a change in strategy might be required. It is worthwhile thinking beyond systematic characterizations and considering the application of cutting edge approaches to universally preserve the fertility of a vast array of species.
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Seki S, Jin B, Mazur P. Extreme rapid warming yields high functional survivals of vitrified 8-cell mouse embryos even when suspended in a half-strength vitrification solution and cooled at moderate rates to -196°C. Cryobiology 2013; 68:71-8. [PMID: 24333434 DOI: 10.1016/j.cryobiol.2013.12.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 10/11/2013] [Accepted: 12/03/2013] [Indexed: 10/25/2022]
Abstract
To cryopreserve cells, it is essential to avoid intracellular ice formation during cooling and warming. One way to do so is to subject them to procedures that convert cell water into a non-crystalline glass. Current belief is that to achieve this vitrification, cells must be suspended in very high concentrations of glass-inducing solutes (i.e., ≥6 molal) and cooled at very high rates (i.e., ≫1000°C/min). We report here that both these beliefs are incorrect with respect to the vitrification of 8-cell mouse embryos. In this study, precompaction 8-cell embryos were vitrified in several dilutions of EAFS10/10 using various cooling rates and warming rates. Survival was based on morphology, osmotic functionality, and on the ability to develop to expanded blastocysts. With a warming rate of 117,500°C/min, the percentages of embryos vitrified in 1×, 0.75×, and 0.5× EAFS that developed to blastocysts were 93%, 92%, and 83%, respectively. And the percentages of morphological survivors that developed to expanded blastocysts were 100%, 92%, and 97%, respectively. Even when the solute concentration of the EAFS was reduced to 33% of normal, we obtained 40% functional survival of these 8-cell embryos.
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Affiliation(s)
- Shinsuke Seki
- Fundamental and Applied Cryobiology Group, Department of Biochemistry and Cellular and Molecular Biology, The University of Tennessee, Knoxville, TN 37996, USA; Present address: Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan
| | - Bo Jin
- Fundamental and Applied Cryobiology Group, Department of Biochemistry and Cellular and Molecular Biology, The University of Tennessee, Knoxville, TN 37996, USA
| | - Peter Mazur
- Fundamental and Applied Cryobiology Group, Department of Biochemistry and Cellular and Molecular Biology, The University of Tennessee, Knoxville, TN 37996, USA.
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Godoy LC, Streit DP, Zampolla T, Bos-Mikich A, Zhang T. A study on the vitrification of stage III zebrafish (Danio rerio) ovarian follicles. Cryobiology 2013; 67:347-354. [DOI: 10.1016/j.cryobiol.2013.10.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 10/03/2013] [Accepted: 10/03/2013] [Indexed: 11/30/2022]
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Zhang N, Li W, Chen C, Zuo J, Weng L. Molecular dynamics study on water self-diffusion in aqueous mixtures of methanol, ethylene glycol and glycerol: investigations from the point of view of hydrogen bonding. Mol Phys 2013. [DOI: 10.1080/00268976.2012.760050] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Generation of functional eggs and sperm from cryopreserved whole testes. Proc Natl Acad Sci U S A 2013; 110:1640-5. [PMID: 23319620 DOI: 10.1073/pnas.1218468110] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The conservation of endangered fish is of critical importance. Cryobanking could provide an effective backup measure for use in conjunction with the conservation of natural populations; however, methodology for cryopreservation of fish eggs and embryos has not yet been developed. The present study established a methodology capable of deriving functional eggs and sperm from frozen type A spermatogonia (ASGs). Whole testes taken from rainbow trout were slowly frozen in a cryomedium, and the viability of ASGs within these testes did not decrease over a 728-d freezing period. Frozen-thawed ASGs that were intraperitoneally transplanted into sterile triploid hatchlings migrated toward, and were incorporated into, recipient genital ridges. Transplantability of ASGs did not decrease after as much as 939 d of cryopreservation. Nearly half of triploid recipients produced functional eggs or sperm derived from the frozen ASGs and displayed high fecundity. Fertilization of resultant gametes resulted in the successful production of normal, frozen ASG-derived offspring. Feasibility and simplicity of this methodology will call for an immediate application for real conservation of endangered wild salmonids.
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Comparative cryobiological traits and requirements for gametes and gonadal tissues collected from wildlife species. Theriogenology 2012; 78:1666-81. [PMID: 22704386 DOI: 10.1016/j.theriogenology.2012.04.008] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 04/03/2012] [Accepted: 04/06/2012] [Indexed: 01/16/2023]
Abstract
A major challenge to retaining viability of frozen gametes and reproductive tissues is to understand and overcome species-specificities, especially because there is substantial diversity in cryobiological properties and requirements among cell types and tissues. Systematic studies can lead to successful post-thaw recovery, especially after determining: 1) membrane permeability to water and cryoprotectant, 2) cryoprotectant toxicity, 3) tolerance to osmotic changes, and 4) resistance to cooling and freezing temperatures. Although species-dependency ultimately dictates the ability of specific cells and tissues to survive freeze-thawing, there are commonalities between taxa that allow a protocol developed for one species to be useful information for another. This is the reason for performing comparative cryopreservation studies among diverse species. Our laboratory has compared cellular cryotolerance, especially in spermatozoa, in a diverse group of animals-from corals to elephants-for more than 30 yrs. Characterizing the biophysical traits of gametes and tissues is the most efficient way to develop successful storage and recovery protocols, but, such data are only available for a few laboratory, livestock, and fish species, with virtually all others (wild mammals, birds, reptiles, and amphibians) having gone unstudied. Nonetheless, when a rare animal unexpectedly dies, there is no time to understand the fundamentals of biophysics. In these emergencies, it is necessary to rely on experience and the best data from taxonomically-related species. Fortunately, there are some general similarities among most species, which, for example, allow adequate post-thaw viability. Regardless, there is a priority for more information on biophysical traits and freezing tolerance of distinctive biomaterials, especially for oocytes and gonadal tissues, and even for common, domesticated animals. Our colleague, Dr John Critser was a pioneer in cryobiology, earning that moniker because of his advocacy and devotion to understanding the differences (and similarities) among species to better store living genetic material.
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