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Wang X, Lu F, Bai S, Wu L, Huang L, Zhou N, Xu B, Wan Y, Jin R, Jiang X, Tong X. A Simple and Efficient Method to Cryopreserve Human Ejaculated and Testicular Spermatozoa in −80°C Freezer. Front Genet 2022; 12:815270. [PMID: 35154258 PMCID: PMC8831890 DOI: 10.3389/fgene.2021.815270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/27/2021] [Indexed: 11/13/2022] Open
Abstract
Human autologous sperm freezing involves ejaculated sperm, and testicular or epididymal puncture sperm freezing, and autologous sperm freezing is widely used in assisted reproductive technology. In previous studies, researchers have tried to cryopreserve sperm from mammals (rats, dogs, etc.) using a −80°C freezer and have achieved success. It is common to use liquid nitrogen vapor rapid freezing to cryopreserve human autologous sperm. However, the operation of this cooling method is complicated, and the temperature drop is unstable. In this study, we compared the quality of human ejaculation and testicular sperm after liquid nitrogen vapor rapid freezing and −80°C freezing for the first time. By analyzing sperm quality parameters of 93 ejaculated sperm and 10 testicular sperm after liquid nitrogen vapor rapid freezing and −80°C freezing, we found reactive oxygen species (ROS) of sperm of the −80°C freezer was significantly lower than liquid nitrogen vapor rapid freezing. Regression analysis showed that progressive motility, ROS, and DNA fragmentation index (DFI) in post-thaw spermatozoa were correlated with sperm progressive motility, ROS, and DFI before freezing. For the freezing method, the −80°C freezer was positively correlated with the sperm progressive motility. Among the factors of freezing time, long-term freezing was negatively correlated with sperm progressive motility and ROS. Although freezing directly at −80°C freezer had a slower temperature drop than liquid nitrogen vapor rapid freezing over the same period, the curves of the temperature drop were similar, and slight differences in the freezing point were observed. Furthermore, there were no statistically significant differences between the two methods for freezing testicular sperm. The method of direct −80°C freezing could be considered a simplified alternative to vapor freezing for short-term human sperm storage. It could be used for cryopreservation of autologous sperm (especially testicular sperm) by in vitro fertilization centers. Clinical Trial Registration: (website), identifier (ChiCTR2100050190).
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Affiliation(s)
- Xiaohan Wang
- Provincial Hospital Affiliated to Anhui Medical University, Hefei, China
| | - Fangting Lu
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Shun Bai
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Limin Wu
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Lingli Huang
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Naru Zhou
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Bo Xu
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Yangyang Wan
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Rentao Jin
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
- *Correspondence: Xiaohua Jiang, ; Xianhong Tong, , Rentao Jin,
| | - Xiaohua Jiang
- Division of Life Sciences and Medicine, Reproductive and Genetic Hospital, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
- *Correspondence: Xiaohua Jiang, ; Xianhong Tong, , Rentao Jin,
| | - Xianhong Tong
- Provincial Hospital Affiliated to Anhui Medical University, Hefei, China
- *Correspondence: Xiaohua Jiang, ; Xianhong Tong, , Rentao Jin,
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Yang S, Chen X, Fan B, Hua Y, Meng Z. Successful short term sperm cryopreservation in brown-marbled grouper (Epinephelus fuscoguttatus) with the utility of ultra-freezer (-80 ℃). Reprod Domest Anim 2021; 57:444-449. [PMID: 34958694 DOI: 10.1111/rda.14072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 12/23/2021] [Indexed: 11/30/2022]
Abstract
Production of cryopreserved semen in fish generally requires liquid nitrogen (LN), which is not always easily available in remote areas. To reduce reliance on LN, the aim of the present study was to evaluate if electric freezer could be a feasible LN-free alternative to cryopreserve brown-marbled grouper sperm. After loading, semen straws were put directly in freezers (-30 or -80 ℃) for frozen and then transferred to LN for storage. Compared with the conventional LN vapor freezing (straws were put horizontally 3 cm above the surface of LN), there was a significant reduction in all tested post-thaw sperm quality parameters in samples frozen at -30 ℃ for 10 min, including kinetic parameters (total motility: 85.0% vs 48.6%), viability (84.7% vs 51.7%), high mitochondrial membrane potential (86.4% vs 63.7%), ATP content (106.9 nM/109 cells vs 72.9 nM/109 cells) and hatching rate (86.3% vs 45.7%), accompanied with an increasing lipid peroxidation level (MDA content: 11.9 nM/109 cells vs 4.9 nM/109 cells). In contrast, frozen with -80 ℃ ultra-freezer (10 min or 12 h) produced similar sperm quality parameters to those using LN, except that temporary storage (12 h) at -80 ℃ yielded lower average path velocity. In conclusion, this study confirmed that -80 ℃ ultra-freezer is an effective alternative to LN for sperm freezing in brown-marbled grouper.
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Affiliation(s)
- Sen Yang
- College of Food Science and Technology, Guangdong Ocean University (Yangjiang Campus), Yangjiang, 529500, China
| | - Xinghan Chen
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.,Department of Food and Environmental Engineering, Yangjiang Polytechnic, Yangjiang, 529500, China
| | - Bin Fan
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.,Department of Food and Environmental Engineering, Yangjiang Polytechnic, Yangjiang, 529500, China
| | - Yanglin Hua
- College of Food Science and Technology, Guangdong Ocean University (Yangjiang Campus), Yangjiang, 529500, China
| | - Zining Meng
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.,Southern Laboratory of Ocean Science and Engineering, Zhuhai, 519000, China
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Mochida K, Hasegawa A, Shikata D, Itami N, Hada M, Watanabe N, Tomishima T, Ogura A. Easy and quick (EQ) sperm freezing method for urgent preservation of mouse strains. Sci Rep 2021; 11:14149. [PMID: 34239008 PMCID: PMC8266870 DOI: 10.1038/s41598-021-93604-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/28/2021] [Indexed: 11/08/2022] Open
Abstract
Cryopreservation of mouse spermatozoa is widely used for the efficient preservation and safe transport of valuable mouse strains. However, the current cryopreservation method requires special containers (plastic straws), undefined chemicals (e.g., skim milk), liquid nitrogen, and expertise when handling sperm suspensions. Here, we report an easy and quick (EQ) sperm freezing method. The main procedure consists of only one step: dissecting a single cauda epididymis in a microtube containing 20% raffinose solution, which is then stored in a -80 °C freezer. The frozen-thawed spermatozoa retain practical fertilization rates after 1 (51%) or even 3 months (25%) with the C57BL/6 J strain, the most sensitive strain for sperm freezing. More than half of the embryos thus obtained developed into offspring after embryo transfer. Importantly, spermatozoa stored at -80 °C can be transferred into liquid nitrogen for indefinite storage. As far as we know, our EQ method is the easiest and quickest method for mouse sperm freezing and should be applicable in all laboratories without expertise in sperm cryopreservation. This technique can help avoid the loss of irreplaceable strains because of closure of animal rooms in emergency situations such as unexpected microbiological contamination or social emergencies such as the COVID-19 threat.
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Affiliation(s)
- Keiji Mochida
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan.
| | - Ayumi Hasegawa
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Daiki Shikata
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan
- Graduate School of Life and Environmental Science, University of Tsukuba, Tsukuba, Ibaraki, 305- 8572, Japan
| | - Nobuhiko Itami
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Masashi Hada
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Naomi Watanabe
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan
- Graduate School of Life and Environmental Science, University of Tsukuba, Tsukuba, Ibaraki, 305- 8572, Japan
| | | | - Atsuo Ogura
- RIKEN BioResouce Research Center, Tsukuba, Ibaraki, 305-0074, Japan.
- Graduate School of Life and Environmental Science, University of Tsukuba, Tsukuba, Ibaraki, 305- 8572, Japan.
- Center for Disease Biology and Integrative Medicine, Faculty of Medicine, University of Tokyo, Bunkyo-ku, Tokyo, Japan.
- RIKEN Cluster for Pioneering Research, Hirosawa, Wako, Saitama, 351-0198, Japan.
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Hart-Johnson S, Mankelow K. Archiving genetically altered animals: a review of cryopreservation and recovery methods for genome edited animals. Lab Anim 2021; 56:26-34. [PMID: 33847177 DOI: 10.1177/00236772211007306] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
With the ever-expanding numbers of genetically altered (GA) animals created in this new age of CRISPR/Cas, tools for helping the management of this vast and valuable resource are essential. Cryopreservation of embryos and germplasm of GA animals has been a widely used tool for many years now, allowing for the archiving, distribution and colony management of stock. However, each year brings an array of advances, improving survival rates of embryos, success rates of in-vitro fertilisation and the ability to better share lines and refine the methods to preserve them. This article will focus on the mouse field, referencing the latest developments and assessing their efficacy and ease of implementation, with a brief note on other common genetically altered species (rat, zebrafish, Xenopus, avian species and non-human Primates).
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Ferrer MS, Canisso IF, Ellerbrock RE, Podico G, Lister BN, Hurley DJ, Kline K, Palomares RA. Optimization of cryopreservation protocols for cooled-transported stallion semen. Anim Reprod Sci 2020; 221:106581. [PMID: 32891911 DOI: 10.1016/j.anireprosci.2020.106581] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 08/14/2020] [Accepted: 08/14/2020] [Indexed: 10/23/2022]
Abstract
Freezing cooled-transported semen allows veterinarians and breeders to collect and process the semen of stallions on farm, and then ship the semen to a semen freezing center. There, however, is a lack of standardization of shipping and freezing protocols. The objectives were to optimize and simplify protocols to freeze cooled-shipped semen. In Experiment 1, cooled-transported semen was centrifuged at room temperature or 5 °C before freezing. Sperm variables (motility, membrane integrity, acrosome integrity, membrane fluidity) were evaluated before and after freezing. Centrifugation temperature had no effect on post-thaw semen quality. In Experiment 2, cooled-transported semen was centrifuged at room temperature and cryopreserved in three semen freezing extenders. With use of the improved modified French formula, there was less post-thaw total and progressive motility compared with use of Botucrio or the improved lactose-EDTA formula (P<0.0001). Semen cryopreserved in the improved modified French formula also had a lesser percentage of sperm with intact membranes compared with lactose-EDTA, and a greater percentage of sperm with capacitation-like changes compared with Botucrio (P<0.0001). In Experiment 3, semen diluted in each extender was frozen conventionally or placed directly in a -80 °C ultra-freezer. Freezing in the ultra-freezer resulted in a lesser post-thaw sperm motility, but not membrane and acrosome integrity and capacitation-like changes. In conclusion, centrifugation and addition of freezing extender to cooled transported semen can be performed at room temperature or 5 °C. The Botucrio and lactose-EDTA formula are recommended for conventional cryopreservation of cooled-transported stallion semen as compared with the modified French formula.
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Affiliation(s)
- M S Ferrer
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.
| | - I F Canisso
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL, USA
| | - R E Ellerbrock
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - G Podico
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL, USA
| | - B N Lister
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - D J Hurley
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - K Kline
- Department of Animal Sciences, College of Agricultural, Environment and Nutritional Sciences, Urbana, IL, USA
| | - R A Palomares
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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