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Arregui L, Koch JC, Tiersch TR. Transitioning from a research protocol to a scalable applied pathway for Xenopus laevis sperm cryopreservation at a national stock center: The effect of cryoprotectants. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART B, MOLECULAR AND DEVELOPMENTAL EVOLUTION 2024; 342:291-300. [PMID: 37984495 PMCID: PMC11094805 DOI: 10.1002/jez.b.23228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/17/2023] [Accepted: 10/27/2023] [Indexed: 11/22/2023]
Abstract
Sperm cryopreservation is a critical tool for safeguarding and managing valuable genetic resources. Protocols for cryopreservation of Xenopus laevis sperm were available but lacking sperm quality evaluation and scalability and the outcomes were inconsistent. The goal of this study was to begin developing a center-level cryopreservation pathway for this species by integrating French straws as containers that would facilitate germplasm repository development. The objectives were to analyze the effect of: (1) three sperm concentrations (33, 50, and 100 × 106 sperm/mL) on post-thaw fertilization, (2) three final concentrations (2.5%, 5%, and 10%) of dimethyl sulfoxide, methanol, and dimethylformamide (DMFA) on sperm membrane integrity of fresh and frozen samples, (3) two concentrations (5% and 10%) of DMFA with and without 5% sucrose at four cooling rates (5, 10, 20, and 40°C/min) on sperm membrane integrity and motility, and (4) egg exposure to different concentrations of DMFA on fertilization. Few differences in sperm viability were found among fresh samples incubated in cryoprotectants, but thawed samples frozen in methanol or DMFA presented higher membrane integrity. Samples frozen in 10% DMFA at 20°C/min showed higher membrane integrity (60 ± 7%) than other DMFA concentrations and cooling rates, and the same total motility (30 ± 7%) as at 10°C/min. Higher DMFA concentrations (10%-13%) were detrimental for embryo development compared to lower concentrations (<6%). This study provided a reliable protocol for sperm cryopreservation in Xenopus laevis to yield an application pathway with potential for high throughput that can be used as a roadmap for work with other species.
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Affiliation(s)
- Lucía Arregui
- School of Renewable Natural Resources, Aquatic Germplasm and Genetic Resources Center, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
| | - Jack C Koch
- School of Renewable Natural Resources, Aquatic Germplasm and Genetic Resources Center, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
| | - Terrence R Tiersch
- School of Renewable Natural Resources, Aquatic Germplasm and Genetic Resources Center, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
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Du C, Zheng X, Jiang J, Meng J, Wu Y, Gao X, Zhu J. The effects of extenders, cryoprotectants and conditions in two-step cooling method on Varicorhinus barbatulus sperm. Cryobiology 2021; 100:133-141. [PMID: 33640316 DOI: 10.1016/j.cryobiol.2021.02.007] [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] [Received: 11/14/2020] [Revised: 02/02/2021] [Accepted: 02/22/2021] [Indexed: 11/25/2022]
Abstract
In this study, we developed an optimal cryopreservation procedure for Varicorhinus barbatulus sperm. To this end, we optimized (1) the types and dilution ratios of extenders; (2) types and final concentration of cryoprotectants; and (3) freezing conditions, including equilibration time, height above the surface of liquid nitrogen (LN), and the cooling times in the two-step cooling method. The optimum result was obtained when the sperm was diluted at a 1:9 ratio in D-17 with 10% methanol, equilibrated at 4 °C for 10 min, held at 7 cm above LN for 2 min, and finally stored in LN. After storage for 12 h in LN, the sperm was thawed in a water bath at 40 °C for 6s, the post-thaw sperm motility was 66.10 ± 7.12%, while the corresponding rate for fresh sperm was 87.08 ± 2.38%. Using computer-assisted sperm analysis, we found a significant decrease in the motility parameters of post-thaw sperm, especially the parameters related to velocity. To evaluate the effects of cryopreservation on the structural integrity of sperm, transmission electron microscopy and scanning electron microscopy were employed, which showed the defects in frozen sperm, including: abnormal heads, damaged plasma membranes, broken tails, and the disappearance of the mitochondrial internal crest. In addition, we determined the mitochondrial membrane potential to assess the functional integrity of frozen sperm. Our results showed a decrease in the mitochondrial function of frozen sperm. This procedure could be used alongside cryopreservation of V. barbatulus and supports its commercial-scale production and species conservation.
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Affiliation(s)
- Chen Du
- Key Laboratory of Applied Marine Biotechnology By the Ministry of Education, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China.
| | - Xuebin Zheng
- Key Laboratory of Applied Marine Biotechnology By the Ministry of Education, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China.
| | - Jianhu Jiang
- Zhejiang Institute of Freshwater Fisheries, Huzhou, Zhejiang, 313001, China.
| | - Jiajie Meng
- Key Laboratory of Applied Marine Biotechnology By the Ministry of Education, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China.
| | - Yuanjie Wu
- Key Laboratory of Applied Marine Biotechnology By the Ministry of Education, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China.
| | - Xinming Gao
- Key Laboratory of Applied Marine Biotechnology By the Ministry of Education, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China.
| | - Junquan Zhu
- Key Laboratory of Applied Marine Biotechnology By the Ministry of Education, Ningbo University, Ningbo, Zhejiang, 315211, People's Republic of China.
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Cryopreservation of Plagiognathops microlepis sperm. Cryobiology 2018; 85:105-112. [DOI: 10.1016/j.cryobiol.2018.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 08/24/2018] [Accepted: 08/24/2018] [Indexed: 11/19/2022]
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Yang S, Han L, Huang R, Liufu Y, Meng Z, Lin H. Optimization of conditions for the cryopreservation of yellow catfish ( Pelteobagrus fulvidraco ) sperm. Cryobiology 2017; 76:104-110. [DOI: 10.1016/j.cryobiol.2017.03.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 03/10/2017] [Accepted: 03/11/2017] [Indexed: 10/19/2022]
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Bernáth G, Żarski D, Kása E, Staszny Á, Várkonyi L, Kollár T, Hegyi Á, Bokor Z, Urbányi B, Horváth Á. Improvement of common carp (Cyprinus carpio) sperm cryopreservation using a programable freezer. Gen Comp Endocrinol 2016; 237:78-88. [PMID: 27570061 DOI: 10.1016/j.ygcen.2016.08.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 06/22/2016] [Accepted: 08/24/2016] [Indexed: 11/20/2022]
Abstract
The applicability of a programmable freezer for the increased-scale cryopreservation of common carp sperm was investigated. The effect of different equilibration times, cryopreservation methods, extenders, dilution ratios, activating solutions on the post-thaw motility of common carp sperm was investigated. The suitable post-thaw storage time-interval as well as fertilizing capacity of cryopreserved sperm was also examined. The motility, curvilinear velocity (VCL) and straightness (STR) values did not decrease significantly during 60min of equilibration neither in equilibrated nor thawed groups. Motility parameters of thawed sperm were similar using a conventional cryopreservation technique using a polystyrene box [motility (33%), VCL (47μm/s) and STR (88%)] and a programmable freezer: [motility (32%), VCL (54μm/s) and STR (89%)]. The highest motility and VCL was measured with a sugar based extender (grayling extender) at a ratio 1:9 (motility: 52%, VCL: 76μm/s) and 1:20 (motility: 49%, VCL: 76μm/s). The activating solution for cyprinids (ASC) could prolong sperm movement up for 2min. A storage time of six hours following thawing did not have a significant effect on the motility parameters of thawed carp sperm. Agglutination was observed during cryopreservation of an elevated volume of sperm whereas motility 47%, VCL 62μm/s and STR 91% were measured after thawing. Fertilization rate with thawed sperm (32%) was significantly lower compared to the control group (73%). According to our results, the developed method using a programmable freezer is suitable for the cryopreservation of elevated number of straws. However, carp sperm agglutination during freezing may have a negative effect on the fertilizing capacity.
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Affiliation(s)
- Gergely Bernáth
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary.
| | - Daniel Żarski
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary; UR AFPA, Université de Lorraine-INRA, 2 Avenue de la Forêt de Haye, BP 172, 54505 Vandœuvre-lès-Nancy, France
| | - Eszter Kása
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Ádám Staszny
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Levente Várkonyi
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Tímea Kollár
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Árpád Hegyi
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Zoltán Bokor
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Béla Urbányi
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
| | - Ákos Horváth
- Department of Aquaculture, Szent István University, Páter Károly u. 1., H-2100 Gödöllő, Hungary
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Commercial-scale out-of-season cryopreservation of Eurasian perch (Perca fluviatilis) sperm and its application for fertilization. Anim Reprod Sci 2016; 170:170-7. [DOI: 10.1016/j.anireprosci.2016.05.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 04/25/2016] [Accepted: 05/03/2016] [Indexed: 11/19/2022]
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Tizkar B, Kazemi R, Alipour A, Seidavi A, Naseralavi G, Ponce-Palafox J. Effects of dietary supplementation with astaxanthin and β-carotene on the semen quality of goldfish (Carassius auratus). Theriogenology 2015; 84:1111-7. [DOI: 10.1016/j.theriogenology.2015.06.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 06/13/2015] [Accepted: 06/13/2015] [Indexed: 10/23/2022]
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Golshahi K, Shabani N, Aramli MS, Noori E. Motility and fertilizing ability of cryopreserved Caspian brown trout (Salmo trutta caspius) sperm: Effect of post-thaw storage time and different sperm-to-egg ratios. Cryobiology 2015; 71:360-3. [PMID: 26255243 DOI: 10.1016/j.cryobiol.2015.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 08/04/2015] [Accepted: 08/05/2015] [Indexed: 11/16/2022]
Abstract
This study was designed to test the effect of post-thaw storage time on sperm motility parameters of Caspian brown trout (n=7). Furthermore, we investigated the effect of sperm-to-egg ratios of 100,000:1, 300,000:1 and 600,000:1 on fertility of cryopreserved Caspian brown semen. Quality was assessed by measuring sperm motility parameters and fertilization rates at the eyed and hatching stages. The percentage of post-thawed sperm motility, curvilinear velocity (VCL) and amplitude of lateral head displacement (ALH) were not affected by 60 min of storage, whereas a decrease in straight line velocity (VSL), average path velocity (VAP) and linearity (LIN) were found in cryopreserved semen. Thus, the cryopreserved sperm of Caspian brown trout could be stored up to 60 min without loss of the percentage of sperm motility. The fertilization rate was not affected by 60 min of post-thaw storage and was over 70% for sperm-to-egg ratios of both 300,000 and 600,000:1. To our knowledge, this study is the first to report the high post-thaw fertilization ability of Caspian brown trout semen at a sperm-to-egg ratio as low as 300,000:1. This procedure after scaling up can be recommended for routine Caspian brown trout sperm cryopreservation.
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Affiliation(s)
- Karim Golshahi
- Young Researchers and Elites Club, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Nariman Shabani
- Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | | | - Elnaz Noori
- Biology Department, Faculty of Sciences, Mohaghegh Ardabili University, Ardabil, Iran
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