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Duan L, Du S, Wang X, Zhou L, Liu Q, Li J. Glial cell line-derived neurotrophic factor (GDNF) is essential for colonization and expansion of turbot (Scophthalmus maximus) germ cells in recipients and in vitro culture. Theriogenology 2024; 214:1-9. [PMID: 37837722 DOI: 10.1016/j.theriogenology.2023.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 10/16/2023]
Abstract
Germ cell transplantation (GCT) is a promising biotechnology that enables the production of donor-derived gametes in surrogate recipients. It plays a crucial role in the protection of endangered species, the propagation of elite species with desired traits, and long-term preservation of genetic resources. This significance is particularly pronounced when GCT is synergistically employed with cryopreservation techniques. However, GCT often encounters challenges due to low colonization rates and, in some cases, complete loss of donor cells in recipients. Glial cell line-derived neurotrophic factor (GDNF) plays a pivotal role in sustaining the self-renewal of spermatogonial stem cells (SSCs) in mammals. Additionally, it has been shown to promote the proliferation of spermatogonia in vitro cultures in certain animal species. In turbot (Scophthalmus maximus), we found that the expressions of gdnf and gfrα1a were predominantly observed in spermatogonia rather than somatic cells, which differed from their expression patterns in mammals. The efficiency of exogenous spermatogonia transplantation in Japanese flounder (Paralichthys olivaceus) larvae could be substantially enhanced by incubating donor cells from turbot with 100 ng/ml GDNF prior to transplantation. This led to a noteworthy increase in the colonization rate, rising from 33%-50%-61.5%. Additionally, the addition of 20 ng/ml GDNF in cell medium could also promote the proliferation of turbot germ cells in vitro. These results demonstrated the gdnf in turbot testis expression characteristics and suggested that addition of GNDF could be an effective way to improve the GCT efficiency and promote the germ cells expansion during in vitro culture.
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Affiliation(s)
- Lei Duan
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shuran Du
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Xueying Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Li Zhou
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Qinghua Liu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
| | - Jun Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
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Octavera A, Yamakawa K, Yoshizaki G. The volume and shape of bitterling eggs are more strongly influenced by germ cell autonomy than by the surrounding somatic cells. FISH PHYSIOLOGY AND BIOCHEMISTRY 2023; 49:967-981. [PMID: 37667149 DOI: 10.1007/s10695-023-01235-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/27/2023] [Indexed: 09/06/2023]
Abstract
There is great variation in the size and shape of teleost eggs from species to species. The size of the teleost egg depends on the amount of yolk accumulated in the egg, which is an important factor directly affecting the survival of hatchlings. Egg shape also contributes significantly to spawning ecology and survival during the prehatching stage. In this study, we used bitterlings, which show a wide variety of egg volumes and shapes, to elucidate whether these factors are determined by germ cells or somatic cells. Reciprocal transplantations of germ cells between two bitterling species revealed that the egg volume was identical to that of the germ cell donor species in both combinations. The egg shape was also very similar to that of the species providing the germ cells. These results suggest that the volume and shape of teleost eggs are greatly influenced by germ cell autonomy.
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Affiliation(s)
- Anna Octavera
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo, 108-8477, Japan
| | - Kohju Yamakawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo, 108-8477, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo, 108-8477, Japan.
- Institute for Reproductive Biotechnology for Aquatic Species (IRBAS), Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo, 108-8477, Japan.
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3
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Cabrita E, Pacchiarini T, Fatsini E, Sarasquete C, Herráez MP. Post-thaw quality assessment of testicular fragments as a source of spermatogonial cells for surrogate production in the flatfish Solea senegalensis. FISH PHYSIOLOGY AND BIOCHEMISTRY 2023:10.1007/s10695-023-01232-2. [PMID: 37644252 DOI: 10.1007/s10695-023-01232-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/16/2023] [Indexed: 08/31/2023]
Abstract
Cryopreservation of germ cells would facilitate the availability of cells at any time allowing the selection of donors and maintaining quality control for further applications such as transplantation and germline recovery. In the present study, we analyzed the efficiency of four cryopreservation protocols applied either to isolated cell suspensions or to testes fragments from Senegalese sole. In testes fragments, the quality of cryopreserved germ cells was analyzed in vitro in terms of cell recovery, integrity and viability, DNA integrity (fragmentation and apoptosis), and lipid peroxidation (malondialdehyde levels). Transplantation of cryopreserved germ cells was performed to check the capacity of cells to in vivo incorporate into the gonadal primordium of Senegalese sole early larval stages (6 days after hatching (dah), pelagic live), during metamorphosis (10 dah) and at post-metamorphic stages (16 dah and 20 dah, benthonic life). Protocols incorporating dimethyl sulfoxide (DMSO) as a cryoprotectant showed higher number of recovered spermatogonia, especially in samples cryopreserved with L-15 + DMSO (0.39 ± 0.18 × 106 cells). Lipid peroxidation and DNA fragmentation were also significantly lower in this treatment compared with other treatments. An important increase in oxidation (MDA levels) was detected in samples containing glycerol as a cryoprotectant, reflected also in terms of DNA damage. Transplantation of L-15 + DMSO cryopreserved germ cells into larvae during early metamorphosis (10 dah, 5.2 mm) showed higher incorporation of cells (27.30 ± 5.27%) than other larval stages (lower than 11%). Cryopreservation of germ cells using testes fragments frozen with L-15 + DMSO was demonstrated to be a useful technique to store Senegalese sole germline.
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Affiliation(s)
- Elsa Cabrita
- Centre of Marine Sciences-CCMAR, University of Algarve, Campus Gambelas, 8005-139, Faro, Portugal.
| | - Tiziana Pacchiarini
- Sea4tech, Incubadora de Alta Tecnología INCUBAZUL, Edificio Europa, Zona Franca de Cádiz, Cádiz, Spain
| | - Elvira Fatsini
- Centre of Marine Sciences-CCMAR, University of Algarve, Campus Gambelas, 8005-139, Faro, Portugal
| | - Carmen Sarasquete
- Institute of Marine Science of Andalusia- ICMAN.CSIC, Av Republica Saharaui 2, 11510 Puerto Real, Cádiz, Spain
| | - María Paz Herráez
- Dept. Biologia Molecular, Facultad de Biologia, Universidad de León, 24071, León, Spain
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Holt WV. Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology. Anim Reprod 2023; 20:e20230026. [PMID: 37700907 PMCID: PMC10494884 DOI: 10.1590/1984-3143-ar2023-0026] [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: 02/19/2023] [Accepted: 07/05/2023] [Indexed: 09/14/2023] Open
Abstract
Mitigation of the widely known threats to the world's biodiversity is difficult, despite the strategies and actions proposed by international agreements such as the United Nations Framework Convention on Climate Change (UNFCCC) and the Convention on Biological Diversity (CBD). Nevertheless, many scientists devote their time and effort to finding and implementing various solutions to the problem. One potential way forward that is gaining popularity involves the establishment of biobank programs aimed at preserving and storing germplasm from threatened species, and then using it to support the future viability and health of threatened populations. This involves developing and using assisted reproductive technologies to achieve their goals. Despite considerable advances in the effectiveness of reproductive technologies, differences between the reproductive behavior and physiology of widely differing taxonomic groups mean that this approach cannot be applied with equal success to many species. Moreover, evidence that epigenetic influences and developmental plasticity, whereby it is now understood that embryonic development, and subsequent health in later life, can be affected by peri-conceptional environmental conditions, is raising the possibility that cryopreservation methods themselves may have to be reviewed and revised when planning the biobanks. Here, I describe the benefits and problems associated with germplasm biobanking across various species, but also offer some realistic assessments of current progress and applications.
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Affiliation(s)
- William Vincent Holt
- Academic Unit of Reproductive and Developmental Medicine, University of Sheffield, Sheffield, United Kingdom
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Majhi SK. Generation of surrogate goldfish Carassius auratus progeny from common carp Cyprinus carpio parents. 3 Biotech 2023; 13:27. [PMID: 36590242 PMCID: PMC9794659 DOI: 10.1007/s13205-022-03424-8] [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: 02/24/2022] [Accepted: 12/07/2022] [Indexed: 12/29/2022] Open
Abstract
Surrogate broodstock technology can increase the production efficiency of commercially important fishes that are difficult to breed in confinement and aid the propagation and recovery of endangered populations. In this study, we report the application of germ cell (GC) transplantation (GCT) for increasing the numbers of progeny produced by small-bodied ornamental fishes by using sexually mature adult fish as recipients. The GCs isolated from prepubertal male goldfish (Carassius auratus) donors (n = 5) were transplanted through the genital papilla into the gonads of adult common carp (Cyprinus carpio) recipients. The endogenous GCs of the recipient were depleted using busulfan (40 mg/kg body weight [BW]; in five doses at 2-week intervals) and high-temperature (38 °C) treatments. Within 4 months after GCT, the donor GCs recolonised the recipients' gonads and resumed gametogenesis. The presence of donor-derived gametes was confirmed through polymerase chain reaction-restriction fragment length polymorphism analysis in all the surrogate common carp males and females. Artificial fertilisation and induced spawning between surrogate males and females yielded pure goldfish progeny; the fertilisation and hatching rates were similar to those of the controls. These results suggest that GCT could also be potentially applied in commercial aquaculture, mainly to increase the numbers of progeny obtained from small-bodied fishes those having low gamete counts.
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Affiliation(s)
- Sullip Kumar Majhi
- ICAR-National Bureau of Fish Genetic Resources, Canal Ring Road, Dilkhusa P.O., Lucknow, Uttar Pradesh 226 002 India
- Visakhapatnam Research Centre of CIFT, Ocean View Layout, Pandurangapuram, Andhra University P.O., Visakhapatnam, 530003 India
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Embryo manipulation in neotropical characiform fish: incubation system, anaesthetic, and PGC transplantation in Prochilodus lineatus. ZYGOTE 2022; 30:773-780. [PMID: 35929453 DOI: 10.1017/s0967199422000211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Primordial germ cells transplantation is a unique approach for conservation and reconstitution of endangered fish species. This study aimed to establish techniques to culture dechorionated embryos in different incubation systems and also to determine anaesthetic concentration for fish recipients in the larval stage for subsequent primordial germ cell transplantation. Intact and dechorionated embryos were divided into three incubation systems: (1) a control group with manual replacement of the solution; (2) a closed environment with high oxygen with manual replacement of the solution; and (3) constant solution recirculation. This combination resulted in six treatments. For the evaluation of anaesthetics for larvae, the concentrations evaluated were 19.5 mM, 24.4 mM, 29.3 mM, and 34.2 mM of 2-phenoxyethanol. Anaesthesia concentration and recovery at different stages were evaluated. For transplantation, primordial germ cells of Astyanax altiparanae were transplanted into anaesthetised larvae (1 dph) of Prochilodus lineatus. Better results were obtained in the recirculation system for dechorionated embryos of P. lineatus for hatching (54.18%) and normal morphology (50.06%). The 2-phenoxyethanol anaesthetic with a dose of 29.3 mM resulted in shorter induction times, in addition to the recovery time between 5 and 10 min. By using this anaesthetic concentration at transplantation, GFP-positive cells were seen in two recipients, but the cells did not proliferate. This study established an effective incubation system for the development of the dechorionated embryo and determined an effective anaesthetic concentration for P. lineatus larvae. In addition, micromanipulation and transplantation of primordial germ cells in neotropical species were conducted for the first time.
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Kayo D, Kanda S, Okubo K. Allogeneic testes transplanted into partially castrated adult medaka (Oryzias latipes) can produce donor-derived offspring by natural mating over a prolonged period. ZOOLOGICAL LETTERS 2022; 8:10. [PMID: 35879745 PMCID: PMC9310406 DOI: 10.1186/s40851-022-00195-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Generally, successful testis transplantation has been considered to require immune suppression in the recipient to avoid rejection of the transplanted tissue. In the present study, we demonstrate in medaka that allogeneic adult testicular tissue will engraft in adult recipients immediately after partial castration without the use of immunosuppressive drugs. The allografted testes are retained in the recipient's body for at least 3 months and are able to produce viable sperm that yield offspring after natural mating. Some recipients showed a high frequency (over 60%) of offspring derived from spermatozoa produced by the transplanted testicular tissue. Histological analyses showed that allografted testicular tissues included both germ cells and somatic cells that had become established within an immunocompetent recipient testis. The relative simplicity of this testis transplantation approach will benefit investigations of the basic processes of reproductive immunology and will improve the technique of gonadal tissue transplantation.
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Affiliation(s)
- Daichi Kayo
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo, Tokyo, 113-8657, Japan.
- Present address: Laboratory of Molecular Ethology, Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi, 980-8577, Japan.
| | - Shinji Kanda
- Laboratory of Physiology, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba, 277-8564, Japan
| | - Kataaki Okubo
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Science, The University of Tokyo, Bunkyo, Tokyo, 113-8657, Japan
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Ryu JH, Xu L, Wong TT. Advantages, Factors, Obstacles, Potential Solutions, and Recent Advances of Fish Germ Cell Transplantation for Aquaculture-A Practical Review. Animals (Basel) 2022; 12:ani12040423. [PMID: 35203131 PMCID: PMC8868515 DOI: 10.3390/ani12040423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/05/2022] [Accepted: 02/06/2022] [Indexed: 12/11/2022] Open
Abstract
Simple Summary This review aims to provide practical information and viewpoints regarding fish germ cell transplantation for enhancing its commercial applications. We reviewed and summarized the data from more than 70 important studies and described the advantages, obstacles, recent advances, and future perspectives of fish germ cell transplantation. We concluded and proposed the critical factors for achieving better success and various options for germ cell transplantation with their pros and cons. Additionally, we discussed why this technology has not actively been utilized for commercial purposes, what barriers need to be overcome, and what potential solutions can advance its applications in aquaculture. Abstract Germ cell transplantation technology enables surrogate offspring production in fish. This technology has been expected to mitigate reproductive barriers, such as long generation time, limited fecundity, and complex broodstock management, enhancing seed production and productivity in aquaculture. Many studies of germ cell transplantation in various fish species have been reported over a few decades. So far, surrogate offspring production has been achieved in many commercial species. In addition, the knowledge of fish germ cell biology and the related technologies that can enhance transplantation efficiency and productivity has been developed. Nevertheless, the commercial application of this technology still seems to lag behind, indicating that the established models are neither beneficial nor cost-effective enough to attract potential commercial users of this technology. Furthermore, there are existing bottlenecks in practical aspects such as impractical shortening of generation time, shortage of donor cells with limited resources, low efficiency, and unsuccessful surrogate offspring production in some fish species. These obstacles need to be overcome through further technology developments. Thus, we thoroughly reviewed the studies on fish germ cell transplantation reported to date, focusing on the practicality, and proposed potential solutions and future perspectives.
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Zhou L, Wang X, Liu Q, Yang J, Xu S, Wu Z, Wang Y, You F, Song Z, Li J. Successful Spermatogonial Stem Cells Transplantation within Pleuronectiformes: First Breakthrough at inter-family Level in Marine Fish. Int J Biol Sci 2021; 17:4426-4441. [PMID: 34803508 PMCID: PMC8579436 DOI: 10.7150/ijbs.63266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 10/06/2021] [Indexed: 11/12/2022] Open
Abstract
As a promising biotechnology, fish germ cell transplantation shows potentials in conservation germplasm resource, propagation of elite species, and generation of transgenic individuals. In this study, we successfully transplanted the Japanese flounder (P. olivaceus), summer flounder (P. dentatus), and turbot (S. maximus) spermatogonia into triploid Japanese flounder larvae, and achieved high transplantation efficiency of 100%, 75-95% and 33-50% by fluorescence tracking and molecular analysis, respectively. Eventually, donor-derived spermatozoa produced offspring by artificial insemination. We only found male and intersex chimeras in inter-family transplantations, while male and female chimeras in both intra-species and intra-genus transplantations. Moreover, the intersex chimeras could mature and produce turbot functional spermatozoa. We firstly realized inter-family transplantation in marine fish species. These results demonstrated successful spermatogonial stem cells transplantation within Pleuronectiformes, suggesting the germ cells migration, incorporation and maturation within order were conserved across a wide range of teleost species.
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Affiliation(s)
- Li Zhou
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,College of Life Science, Ningde Normal University, Engineering Research Center of Mindong Aquatic Product Deep-Processing, Fujian Province University, Ningde, China
| | - Xueying Wang
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Qinghua Liu
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Jingkun Yang
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Shihong Xu
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Zhihao Wu
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Yanfeng Wang
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Feng You
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Zongcheng Song
- Weihai Shenghang Aquatic Product Science and Technology Co. Ltd., Weihai, China
| | - Jun Li
- The Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Ichida K, Jangprai A, Khaosa-Art P, Yoshizaki G, Boonanuntanasarn S. Characterization of a vasa homolog in Mekong giant catfish (Pangasianodon gigas): Potential use as a germ cell marker. Anim Reprod Sci 2021; 234:106869. [PMID: 34656888 DOI: 10.1016/j.anireprosci.2021.106869] [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: 03/18/2021] [Revised: 09/25/2021] [Accepted: 09/27/2021] [Indexed: 11/25/2022]
Abstract
For the long-term preservation of the genetic resources of endangered fish species, a combination of germ cell cryopreservation and transplantation can be an effective technique. To optimize these techniques, it is important to identify undifferentiated germ cells possessing transplantability, such as primordial germ cells, type A spermatogonia (ASGs), and oogonia. In this study, a homolog of vasa cDNA in Mekong giant catfish (MGC-vasa) (Pangasianodon gigas), which is an endangered species inhabiting the Mekong river, was cloned and characterized for use as a putative germ cell marker. Results indicate that MGC-Vasa contained all of the consensus motifs, including the arginine-glycine and arginine-glycine-glycine motifs, as well as the nine conserved motifs belonging to the DEAD-box family of proteins. Results from phylogenetic analysis indicated MGC-vasa also grouped with Vasa and was clearly distinguishable from Pl10 in other teleosts. Results from analysis of abundance of mRNA transcripts using reverse transcription-polymerase chain reaction and in situ hybridization performed on immature Mekong giant catfish testis indicated vasa was present specifically in germ cells, with large abundances of the relevant mRNA in spermatogonia and spermatocytes. Sequence similarity and the specific localization of MGC-vasa in these germ cells suggest that the sequence ascertained in this study was a vasa homolog in Mekong giant catfish. Furthermore, vasa-positive cells were detected in prepared smears of testicular cells, indicating that it may be a useful germ cell marker for enzymatically dissociated cells used for transplantation studies.
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Affiliation(s)
- Kensuke Ichida
- Institute for Reproductive Biotechnology for Aquatic Species (IRBAS), Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan
| | - Araya Jangprai
- School of Animal Technology and Innovation, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Pongsawan Khaosa-Art
- School of Animal Technology and Innovation, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Goro Yoshizaki
- Institute for Reproductive Biotechnology for Aquatic Species (IRBAS), Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan; Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan
| | - Surintorn Boonanuntanasarn
- School of Animal Technology and Innovation, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima, Thailand.
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Surrogate production of genome-edited sperm from a different subfamily by spermatogonial stem cell transplantation. SCIENCE CHINA-LIFE SCIENCES 2021; 65:969-987. [PMID: 34586576 DOI: 10.1007/s11427-021-1989-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/10/2021] [Indexed: 12/25/2022]
Abstract
The surrogate reproduction technique, such as inter-specific spermatogonial stem cells (SSCs) transplantation (SSCT), provides a powerful tool for production of gametes derived from endangered species or those with desirable traits. However, generation of genome-edited gametes from a different species or production of gametes from a phylogenetically distant species such as from a different subfamily, by SSCT, has not succeeded. Here, using two small cyprinid fishes from different subfamilies, Chinese rare minnow (gobiocypris rarus, for brief: Gr) and zebrafish (danio rerio), we successfully obtained Gr-derived genome-edited sperm in zebrafish by an optimized SSCT procedure. The transplanted Gr SSCs supported the host gonadal development and underwent normal spermatogenesis, resulting in a reconstructed fertile testis containing Gr spermatids and zebrafish testicular somatic cells. Interestingly, the surrogate spermatozoa resembled those of host zebrafish but not donor Gr in morphology and swimming behavior. When pou5f3 and chd knockout Gr SSCs were transplanted, Gr-derived genome-edited sperm was successfully produced in zebrafish. This is the first report demonstrating surrogate production of gametes from a different subfamily by SSCT, and surrogate production of genome-edited gametes from another species as well. This method is feasible to be applied to future breeding of commercial fish and livestock.
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12
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de Siqueira-Silva DH, Dos Santos Silva AP, da Silva Costa R, Senhorini JA, Ninhaus-Silveira A, Veríssimo-Silveira R. Preliminary study on testicular germ cell isolation and transplantation in an endangered endemic species Brycon orbignyanus (Characiformes: Characidae). FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:767-776. [PMID: 30937624 DOI: 10.1007/s10695-019-00631-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
We aimed to develop a simplified protocol for transplantation of Brycon orbignyanus spermatogonial stem cells (SSCs) into Astyanax altiparanae testes. Brycon orbignyanus testes were enzymatically digested and SSC purified by a discontinuous density gradient. Endogenous spermatogenesis was suppressed in A. altiparanae using busulfan or by incubation at 35 °C water, and SSCs from B. orbignyanus labeled with PKH26 were injected into their testes via the urogenital papilla. Twenty-two hours post-transplantation, labeled spermatogonia were observed in A. altiparanae tubular lumen. After 7 days, spermatogonia proliferated in the epithelium, and 21 days post-transplantation, sperm was observed in the lumen. Of surviving host fish, nearly 67% of those treated with busulfan and 85% of those held in warm water showed labeled cells in host germinal epithelium. The present study standardized, by a simple and accessible method, germ cell transplantation between sexually mature Characiformes fish species. This is the first report of xenogenic SSC transplantation in this fish order.
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Affiliation(s)
- Diógenes Henrique de Siqueira-Silva
- Campus de Ilha Solteira, Departament of Biology and Animal Science, L.I.NEO - Laboratório de Ictiologia Neotropical, UNESP - Univ. Estadual Paulista, Avenida Brasil Centro, 56, Ilha Solteira, Sao Paulo, 15385-000, Brazil.
- Campus de São José do Rio Preto, Post-Graduation Program in Animal Biology, UNESP - Univ. Estadual Paulista, Rua Cristovão Colombo, Jardim Nazareth, 2265, São José do Rio Preto, Sao Paulo, 15504-000, Brazil.
- Campus de Ilha Solteira, Departamento de Biologia e Zootecnia, L.I.NEO - Laboratório de Ictiologia Neotropical, UNESP -Univ. Estadual Paulista, Rua Monção, 226, Zona Norte, Sao Paulo, Brazil.
| | - Amanda Pereira Dos Santos Silva
- Campus de São José do Rio Preto, Post-Graduation Program in Animal Biology, UNESP - Univ. Estadual Paulista, Rua Cristovão Colombo, Jardim Nazareth, 2265, São José do Rio Preto, Sao Paulo, 15504-000, Brazil
| | - Raphael da Silva Costa
- Campus de São José do Rio Preto, Post-Graduation Program in Animal Biology, UNESP - Univ. Estadual Paulista, Rua Cristovão Colombo, Jardim Nazareth, 2265, São José do Rio Preto, Sao Paulo, 15504-000, Brazil
| | - José Augusto Senhorini
- CEPTA-ICMBIO - National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Rodovia Pref. Euberto Nemesio Pereira de Godoy, Pirassununga, Sao Paulo, 13630-970, Brazil
| | - Alexandre Ninhaus-Silveira
- Campus de Ilha Solteira, Departament of Biology and Animal Science, L.I.NEO - Laboratório de Ictiologia Neotropical, UNESP - Univ. Estadual Paulista, Avenida Brasil Centro, 56, Ilha Solteira, Sao Paulo, 15385-000, Brazil
- Campus de São José do Rio Preto, Post-Graduation Program in Animal Biology, UNESP - Univ. Estadual Paulista, Rua Cristovão Colombo, Jardim Nazareth, 2265, São José do Rio Preto, Sao Paulo, 15504-000, Brazil
| | - Rosicleire Veríssimo-Silveira
- Campus de Ilha Solteira, Departament of Biology and Animal Science, L.I.NEO - Laboratório de Ictiologia Neotropical, UNESP - Univ. Estadual Paulista, Avenida Brasil Centro, 56, Ilha Solteira, Sao Paulo, 15385-000, Brazil
- Campus de São José do Rio Preto, Post-Graduation Program in Animal Biology, UNESP - Univ. Estadual Paulista, Rua Cristovão Colombo, Jardim Nazareth, 2265, São José do Rio Preto, Sao Paulo, 15504-000, Brazil
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Jin YH, Robledo D, Hickey JM, McGrew MJ, Houston RD. Surrogate broodstock to enhance biotechnology research and applications in aquaculture. Biotechnol Adv 2021; 49:107756. [PMID: 33895331 PMCID: PMC8192414 DOI: 10.1016/j.biotechadv.2021.107756] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/23/2021] [Accepted: 04/17/2021] [Indexed: 01/08/2023]
Abstract
Aquaculture is playing an increasingly important role in meeting global demands for seafood, particularly in low and middle income countries. Genetic improvement of aquaculture species has major untapped potential to help achieve this, with selective breeding and genome editing offering exciting avenues to expedite this process. However, limitations to these breeding and editing approaches include long generation intervals of many fish species, alongside both technical and regulatory barriers to the application of genome editing in commercial production. Surrogate broodstock technology facilitates the production of donor-derived gametes in surrogate parents, and comprises transplantation of germ cells of donors into sterilised recipients. There are many successful examples of intra- and inter-species germ cell transfer and production of viable offspring in finfish, and this leads to new opportunities to address the aforementioned limitations. Firstly, surrogate broodstock technology raises the opportunity to improve genome editing via the use of cultured germ cells, to reduce mosaicism and potentially enable in vivo CRISPR screens in the progeny of surrogate parents. Secondly, the technology has pertinent applications in preservation of aquatic genetic resources, and in facilitating breeding of high-value species which are otherwise difficult to rear in captivity. Thirdly, it holds potential to drastically reduce the effective generation interval in aquaculture breeding programmes, expediting the rate of genetic gain. Finally, it provides new opportunities for dissemination of tailored, potentially genome edited, production animals of high genetic merit for farming. This review focuses on the state-of-the-art of surrogate broodstock technology, and discusses the next steps for its applications in research and production. The integration and synergy of genomics, genome editing, and reproductive technologies have exceptional potential to expedite genetic gain in aquaculture species in the coming decades. Genetic improvement in aquaculture species has a major role in global food security. Advances in biotechnology provide new opportunities to support aquaculture breeding. Advances in biotechnology provide new opportunities to support aquaculture breeding. Donor-derived gametes can be produced from surrogate broodstock of several aquaculture species. Surrogate broodstock technology provides new opportunities for application of genome editing. Surrogate broodstock can accelerate genetic gain, and improve dissemination of elite germplasm.
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Affiliation(s)
- Ye Hwa Jin
- The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin EH25 9RG, UK
| | - Diego Robledo
- The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin EH25 9RG, UK
| | - John M Hickey
- The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin EH25 9RG, UK
| | - Mike J McGrew
- The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin EH25 9RG, UK
| | - Ross D Houston
- The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin EH25 9RG, UK.
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14
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Morita T, Miwa M, Kumakura N, Morishima K, Miki T, Takeuchi Y, Yoshizaki G. Production of functional sperm from cryopreserved testicular germ cells following intraperitoneal transplantation into allogeneic surrogate in yellowtail (Seriola quinqueradiata). Cryobiology 2021; 100:32-39. [PMID: 33831369 DOI: 10.1016/j.cryobiol.2021.04.001] [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] [Received: 12/04/2020] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 11/25/2022]
Abstract
The aim of this study was to establish a method for the cryopreservation of spermatogonia of the yellowtail (Seriola quinqueradiata), which is the most commonly farmed fish in Japan. Testicular cells were prepared by enzymatic dissociation of testicular fragments containing an abundance of type A spermatogonia and were added to cryomedium containing dimethyl sulfoxide (DMSO), ethylene glycol, glycerol, or propylene glycol at concentrations of 0.5-2.5 M. The cells were then frozen and stored in liquid nitrogen for 3 days. After thawing, their survival and transplantability were evaluated. Testicular cells were most successfully cryopreserved in 1.0 M DMSO as indicated by survival of 34% of cells. Furthermore, in situ hybridization using the yellowtail vasa probe showed that these recovered cells contained a similar proportion of germ cells to fresh testicular cells before freezing. Transplantation of the recovered cells into the peritoneal cavities of allogeneic larvae resulted in 94% of surviving recipients having donor-derived germ cells in their gonads after 28 days. Sperm were then collected from seven randomly selected recipients once they reached 2 years of age and used to fertilize wild-type eggs, which led to an average of 26% of the first filial (F1) offspring being derived from donor fish, as confirmed through the use of microsatellite markers. Thus, we successfully cryopreserved yellowtail spermatogonia and produced functional sperm via intraperitoneal transplantation into allogeneic recipients.
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Affiliation(s)
- Tetsuro Morita
- Central Research Laboratory, Nippon Suisan Kaisha, Ltd., 1-32-3 Nanakuni, Hachioji-shi, Tokyo, 192-0991, Japan.
| | - Misako Miwa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
| | - Naoki Kumakura
- Central Research Laboratory, Nippon Suisan Kaisha, Ltd., 1-32-3 Nanakuni, Hachioji-shi, Tokyo, 192-0991, Japan
| | - Kagayaki Morishima
- Central Research Laboratory, Nippon Suisan Kaisha, Ltd., 1-32-3 Nanakuni, Hachioji-shi, Tokyo, 192-0991, Japan
| | - Takahisa Miki
- Central Research Laboratory, Nippon Suisan Kaisha, Ltd., 1-32-3 Nanakuni, Hachioji-shi, Tokyo, 192-0991, Japan
| | - Yutaka Takeuchi
- Noto Center for Fisheries Science and Technology, Faculty of Biological Science and Technology, Kanazawa University, 11-4-1 Otsusaka, Noto-cho, Ishikawa, 927-0552, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
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Kawamura W, Tani R, Yahagi H, Kamio S, Morita T, Takeuchi Y, Yazawa R, Yoshizaki G. Suitability of hybrid mackerel (Scomber australasicus × S. japonicus) with germ cell-less sterile gonads as a recipient for transplantation of bluefin tuna germ cells. Gen Comp Endocrinol 2020; 295:113525. [PMID: 32502497 DOI: 10.1016/j.ygcen.2020.113525] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/25/2020] [Accepted: 05/30/2020] [Indexed: 01/11/2023]
Abstract
We aim to establish a small-bodied surrogate broodstock, such as mackerel, which produces functional bluefin tuna gametes by spermatogonial transplantation. When reproductively fertile fish are used as recipients, endogenous gametogenesis outcompetes donor-derived gametogenesis, and recipient fish predominantly produce their gametes. In this study, we assessed fertility of hybrid mackerel, Scomber australasicus × S. japonicus, and its suitability as a recipient for transplantation of bluefin tuna germ cells. Hybrid mackerel were produced by artificially inseminating S. australasicus eggs with S. japonicus spermatozoa. Cellular DNA content and PCR analyses revealed that F1 offspring were diploid carrying both paternal and maternal genomes. Surprisingly, histological observations found no germ cells in hybrid mackerel gonads at 120 days post-hatch (dph), although they were present in the gonad of 30- and 60-dph hybrid mackerel. The frequency of germ cell-less fish was 100% at 120-dph, 63.1% at 1-year-old, and 81.8% at 2-year-old. We also confirmed a lack of expression of germ cell marker (DEAD-box helicase 4, ddx4) in the germ cell-less gonads of hybrid mackerel. By contrast, expression of Sertoli cell marker (gonadal soma-derived growth factor, gsdf) and of Leydig cell marker (steroid 11-beta-hydroxlase, cyp11b1) were clearly detected in hybrid mackerel gonads. Together these results showed that most of the hybrid gonads were germ cell-less sterile, but still possessed supporting cells and steroidogenic cells, both of which are indispensable for nursing donor-derived germ cells. To determine whether hybrid gonads could attract and incorporate donor bluefin tuna germ cells, testicular cells labeled with PKH26 fluorescent dye were intraperitoneally transplanted. Fluorescence observation of hybrid recipients at 14 days post-transplantation revealed that donor cells had been incorporated into the recipient's gonads. This suggests that hybrid mackerel show significant promise for use as a recipient to produce bluefin tuna gametes.
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Affiliation(s)
- Wataru Kawamura
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Reoto Tani
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Hana Yahagi
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Shigeharu Kamio
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Tetsuro Morita
- Oita Marine Biological Technology Center, Nippon Suisan Kaisha, Ltd., 508-8, Ariakrura Turumi, Saiki-shi, Oita 876-1204, Japan
| | - Yutaka Takeuchi
- Noto Center for Fisheries Science and Technology, Faculty of Biological Science and Technology, Kanazawa University, 11-4-1 Otsusaka, Noto-cho, Ishikawa 927-0552, Japan
| | - Ryosuke Yazawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan.
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan.
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16
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Ichida K, Kawamura W, Miwa M, Iwasaki Y, Kubokawa T, Hayashi M, Yazawa R, Yoshizaki G. Specific visualization of live type A spermatogonia of Pacific bluefin tuna using fluorescent dye-conjugated antibodies†. Biol Reprod 2020; 100:1637-1647. [PMID: 30934056 DOI: 10.1093/biolre/ioz047] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 01/31/2019] [Accepted: 03/31/2019] [Indexed: 11/12/2022] Open
Abstract
During our previous work toward establishing surrogate broodstock that can produce donor-derived gametes by germ cell transplantation, we found that only type A spermatogonia (ASGs) have the potency to colonize recipient gonads. Therefore, the ability to visualize ASGs specifically would allow the sequential analysis of donor cell behavior in the recipient gonads. Here we produced monoclonal antibodies that could recognize the cell surface antigens of ASGs in Pacific bluefin tuna (Thunnus orientalis), with the aim of visualizing live ASGs. We generated monoclonal antibodies by inoculating Pacific bluefin tuna testicular cells containing ASGs into mice and then screened them using cell-based enzyme-linked immunosorbent assay (ELISA), immunocytochemistry, flow cytometry (FCM), and immunohistochemistry, which resulted in the selection of two antibodies (Nos. 152 and 180) from a pool of 1152 antibodies. We directly labeled these antibodies with fluorescent dye, which allowed ASG-like cells to be visualized in a one-step procedure using immunocytochemistry. Molecular marker analyses against the FCM-sorted fluorescent cells confirmed that ASGs were highly enriched in the antibody-positive fraction. To evaluate the migratory capability of the ASGs, we transplanted visualized cells into the peritoneal cavity of nibe croaker (Nibea mitsukurii) larvae. This resulted in incorporated fluorescent cells labeled with antibody No. 152 being detected in the recipient gonads, suggesting that the visualized ASGs possessed migratory and incorporation capabilities. Thus, the donor germ cell visualization method that was developed in this study will facilitate and simplify Pacific bluefin tuna germ cell transplantation.
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Affiliation(s)
- Kensuke Ichida
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Wataru Kawamura
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Misako Miwa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Yoshiko Iwasaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Tsubasa Kubokawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Makoto Hayashi
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Ibaraki, Japan
| | - Ryosuke Yazawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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Duangkaew R, Kezuka F, Ichida K, Boonanuntanasarn S, Yoshizaki G. Aging- and temperature-related activity of spermatogonial stem cells for germ cell transplantation in medaka. Theriogenology 2020; 155:213-221. [PMID: 32726705 DOI: 10.1016/j.theriogenology.2020.05.049] [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: 10/19/2019] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 01/15/2023]
Abstract
Spermatogonial transplantation can contribute to developing a novel method of producing seedlings for both aquaculture and biotic conservation. This study's purpose was to investigate aging- and temperature-related changes in the numbers and stem cell functions of type-A spermatogonia (ASG) in the model fish medaka (Oryzias latipes). The ASG numbers in medaka of different ages were quantified via histological observation and enzymatic dissociation of vasa-Gfp medaka testes. The ASG numbers were higher in eight-month-old medaka (maturation) than in four-month-old medaka (the onset of maturation). However, ASG numbers decreased in 18-month-old medaka (senescence). Low water temperature appeared to slow down both testis development and aging processes. To study the effects of aging on ASG stem cell activity, testicular cell suspensions containing GFP-expressed ASG were prepared from vasa-Gfp medaka donors at 4 and 18 months of age and transplanted into recipient hybrid larvae of medaka (O. latipes x O. curvinotus), which provided young stem-cell-niches. The findings revealed no significant differences in ASG colonization rates isolated from medaka of different ages. Each group displayed similar rates of germ-line transmission. Furthermore, water temperature had no significant effects on each ASG's stem cell activity. Taken together, these results indicated that aging and temperature affect ASG numbers. However, ASG isolated from medaka with different ages were transplanted into gonads with a young niche microenvironment, and there was no evidence of donor aging on stem cell activity.
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Affiliation(s)
- Rungsun Duangkaew
- School of Animal Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima, 30000, Thailand
| | - Fumi Kezuka
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato-Ku, Tokyo, 108-8477, Japan
| | - Kensuke Ichida
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato-Ku, Tokyo, 108-8477, Japan
| | - Surintorn Boonanuntanasarn
- School of Animal Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima, 30000, Thailand.
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato-Ku, Tokyo, 108-8477, Japan
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Meagre Argyrosomus regius (Asso, 1801) Stem Spermatogonia: Histological Characterization, Immunostaining, In Vitro Proliferation, and Cryopreservation. Animals (Basel) 2020; 10:ani10050851. [PMID: 32423131 PMCID: PMC7278407 DOI: 10.3390/ani10050851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/11/2020] [Accepted: 05/12/2020] [Indexed: 01/01/2023] Open
Abstract
The meagre, Argyrosomus regius, is a valued fish species of which aquaculture production might be supported by the development of a stem germ cell xenotransplantation technology. Meagre males were sampled at a fish farm in the Ionian Sea (Italy) at the beginning and end of the reproductive season. Small and large Type A undifferentiated spermatogonia were histologically identified in the germinal epithelium. Among the tested stemness markers, anti-oct4 and anti-vasa antibodies labeled cells likely corresponding to the small single Type A spermatogonia; no labeling was obtained with anti-GFRA1 and anti-Nanos2 antibodies. Two types of single A spermatogonia were purified via density gradient centrifugation of enzymatically digested testes. Testes from fish in active spermatogenesis resulted in a more efficient spermatogonial stem cell (SSC) yield. After cell seeding, meagre SSCs showed active proliferation from Day 7 to Day 21 and were cultured up to Day 41. After cryopreservation in dimethyl-sulfoxide-based medium, cell viability was 28.5%. In conclusion, these results indicated that meagre SSCs could be isolated, characterized, cultured in vitro, successfully cryopreserved, and used after thawing. This is a first step towards the development of a xenotransplantation technology that might facilitate the reproduction of this valuable species in captivity.
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Nagasawa K, Ishida M, Octavera A, Kusano K, Kezuka F, Kitano T, Yoshiura Y, Yoshizaki G. Novel method for mass producing genetically sterile fish from surrogate broodstock via spermatogonial transplantation†. Biol Reprod 2020; 100:535-546. [PMID: 30252024 DOI: 10.1093/biolre/ioy204] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 08/12/2018] [Accepted: 09/21/2018] [Indexed: 11/13/2022] Open
Abstract
A stable system for producing sterile domesticated fish is required to prevent genetic contamination to native populations caused by aquaculture escapees. The objective of this study was to develop a system to mass produce stock for aquaculture that is genetically sterile by surrogate broodstock via spermatogonial transplantation (SGTP). We previously discovered that female medaka carrying mutations on the follicle-stimulating hormone receptor (fshr) gene become sterile. In this study, we demonstrated that sterile hybrid recipient females that received spermatogonia isolated from sex-reversed XX males (fshr (-/-)) recovered their fertility and produced only donor-derived fshr (-) X eggs. Natural mating between these females and fshr (-/-) sex-reversed XX males successfully produced large numbers of sterile fshr (-/-) female offspring. In conclusion, we established a new strategy for efficient mass production of sterile fish. This system can be applied to any aquaculture species for which SGTP and methods for producing sterile recipients can be established.
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Affiliation(s)
- Kazue Nagasawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Mariko Ishida
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Anna Octavera
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Kazunari Kusano
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Fumi Kezuka
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Takeshi Kitano
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan
| | - Yasutoshi Yoshiura
- Yashima Station, Stock Enhancement and Management Department, National Research Institute of Fisheries and Enhancement of Inland Sea, Fisheries Research Agency, Kagawa, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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20
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Ichida K, Hayashi M, Miwa M, Kitada R, Takahashi M, Fujihara R, Boonanuntanasarn S, Yoshizaki G. Enrichment of transplantable germ cells in salmonids using a novel monoclonal antibody by magnetic-activated cell sorting. Mol Reprod Dev 2019; 86:1810-1821. [PMID: 31544311 DOI: 10.1002/mrd.23275] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/30/2019] [Indexed: 01/24/2023]
Abstract
In the fish germ cell transplantation system, only type A spermatogonia (ASGs) and oogonia are known to be incorporated into the recipient genital ridges, where they undergo gametogenesis. Therefore, high colonization efficiency can be achieved by enriching undifferentiated germ cells out of whole testicular cells. In this study, we used magnetic-activated cell sorting (MACS) for enriching undifferentiated germ cells of rainbow trout using a monoclonal antibody that recognizes a specific antigen located on the germ cell membrane. We screened the antibodies to be used for MACS by performing immunohistochemistry on rainbow trout gonads. Two antibodies, nos. 172 and 189, showed strong signals for ASGs and oogonia. Next, we performed MACS with antibody no. 172 using gonadal cells isolated from vasa-gfp rainbow trout showing GFP in undifferentiated germ cells. We found that GFP-positive cells are highly enriched in antibody no. 172-positive fractions. Finally, to examine the transplantability of MACS-enriched cells, we intraperitoneally transplanted sorted or unsorted cells into recipient larvae. We observed that transplantability of sorted cells, particularly ovarian cells, were significantly higher than that of unsorted cells. Therefore, MACS with antibody no. 172 could enrich ASGs and oogonia and become a powerful tool to improve transplantation efficiency in salmonids.
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Affiliation(s)
- Kensuke Ichida
- School of Animal Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Makoto Hayashi
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Ibaraki, Japan
| | - Misako Miwa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Ryota Kitada
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Momo Takahashi
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Ryo Fujihara
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Surintorn Boonanuntanasarn
- School of Animal Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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21
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A state-of-the-art review of surrogate propagation in fish. Theriogenology 2019; 133:216-227. [DOI: 10.1016/j.theriogenology.2019.03.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Accepted: 03/30/2019] [Indexed: 12/20/2022]
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22
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Duangkaew R, Jangprai A, Ichida K, Yoshizaki G, Boonanuntanasarn S. Characterization and expression of a vasa homolog in the gonads and primordial germ cells of the striped catfish (Pangasianodon hypophthalmus). Theriogenology 2019; 131:61-71. [DOI: 10.1016/j.theriogenology.2019.01.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 01/19/2019] [Accepted: 01/27/2019] [Indexed: 10/27/2022]
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23
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Higuchi K, Goto R, Konishi J, Ina Y, Kazeto Y, Gen K. Early development of primordial germ cells in Pacific bluefin tuna Thunnus orientalis. Theriogenology 2019; 131:106-112. [DOI: 10.1016/j.theriogenology.2019.03.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/29/2019] [Accepted: 03/30/2019] [Indexed: 01/24/2023]
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24
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Vasconcelos ACN, Streit DP, Octavera A, Miwa M, Kabeya N, Freitas Garcia RR, Rotili DA, Yoshizaki G. Isolation and characterization of a germ cell marker in teleost fish Colossoma macropomum. Gene 2019; 683:54-60. [DOI: 10.1016/j.gene.2018.10.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/24/2018] [Accepted: 10/11/2018] [Indexed: 10/28/2022]
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de Siqueira-Silva DH, Saito T, Dos Santos-Silva AP, da Silva Costa R, Psenicka M, Yasui GS. Biotechnology applied to fish reproduction: tools for conservation. FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:1469-1485. [PMID: 29707740 DOI: 10.1007/s10695-018-0506-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
This review discusses the new biotechnological tools that are arising and promising for conservation and enhancement of fish production, mainly regarding the endangered and the most economically important species. Two main techniques, in particular, are available to avoid extinction of endangered fish species and to improve the production of commercial species. Germ cell transplantation technology includes a number of approaches that have been studied, such as the transplantation of embryo-to-embryo blastomere, embryo-to-embryo differentiated PGC, larvae to larvae and embryo differentiated PGC, transplantation of spermatogonia from adult to larvae or between adults, and oogonia transplantation. However, the success of germ cell transplantation relies on the prior sterilization of fish, which can be performed at different stages of fish species development by means of several protocols that have been tested in order to achieve the best approach to produce a sterile fish. Among them, fish hybridization and triploidization, germline gene knockdown, hyperthermia, and chemical treatment deserve attention based on important results achieved thus far. This review currently used technologies and knowledge about surrogate technology and fish sterilization, discussing the stronger and the weaker points of each approach.
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Affiliation(s)
- Diógenes Henrique de Siqueira-Silva
- UNIFESSPA - Federal University of South and Southeast of Para - Institute for Health and Biological Studies - IESB, Faculty of Biology - FACBIO, Laboratory of Neuroscience and Behavior, Marabá, Para, Brazil.
| | - Taiju Saito
- Nishiura Station, South Ehime Fisheries Research Center, Ehime University, Uchidomari, Ainan, Japan
| | | | - Raphael da Silva Costa
- PPG in Animal Biology, UNESP - Paulista State University, São José do Rio Preto, São Paulo, Brazil
| | - Martin Psenicka
- Research Institute of Fish Culture and Hydrobiology, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, Vodnany, Czech Republic
| | - George Shigueki Yasui
- Laboratory of Fish Biotechnology, National Center for Research and Conservation of Continental Fish, Chico Mendes Institute of Biodiversity Conservation, Pirassununga, São Paulo, Brazil
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Octavera A, Yoshizaki G. Production of donor-derived offspring by allogeneic transplantation of spermatogonia in Chinese rosy bitterling†. Biol Reprod 2018; 100:1108-1117. [DOI: 10.1093/biolre/ioy236] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 10/08/2018] [Accepted: 11/14/2018] [Indexed: 12/19/2022] Open
Affiliation(s)
- Anna Octavera
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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Yoshizaki G, Lee S. Production of live fish derived from frozen germ cells via germ cell transplantation. Stem Cell Res 2018; 29:103-110. [DOI: 10.1016/j.scr.2018.03.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 03/17/2018] [Accepted: 03/28/2018] [Indexed: 10/25/2022] Open
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Hybrid Sterility in Fish Caused by Mitotic Arrest of Primordial Germ Cells. Genetics 2018; 209:507-521. [PMID: 29610216 DOI: 10.1534/genetics.118.300777] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 03/23/2018] [Indexed: 11/18/2022] Open
Abstract
Sterility in hybrid animals is widely known to be due to a cytological mechanism of aberrant homologous chromosome pairing during meiosis in hybrid germ cells. In this study, the gametes of four marine fish species belonging to the Sciaenid family were artificially fertilized, and germ cell development was examined at the cellular and molecular levels. One of the intergeneric hybrids had gonads that were testis-like in structure, small in size, and lacked germ cells. Specification of primordial germ cells (PGCs) and their migration toward genital ridges occurred normally in hybrid embryos, but these PGCs did not proliferate in the hybrid gonads. By germ cell transplantation assay, we showed that the gonadal microenvironment in hybrid recipients produced functional donor-derived gametes, suggesting that the germ cell-less phenotype was caused by cell autonomous proliferative defects of hybrid PGCs. This is the first evidence of mitotic arrest of germ cells causing hybrid sterility in animals.
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Yang Y, Liu Q, Xiao Y, Wang X, An H, Song Z, You F, Wang Y, Ma D, Li J. Germ Cell Migration, Proliferation and Differentiation during Gonadal Morphogenesis in All-Female Japanese Flounder (Paralichthys Olivaceus
). Anat Rec (Hoboken) 2018; 301:727-741. [DOI: 10.1002/ar.23698] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 04/23/2017] [Accepted: 05/03/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Yang Yang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
| | - Qinghua Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Yongshuang Xiao
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Xueying Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
| | - Hao An
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
| | - Zongcheng Song
- Weihai Shenghang Aquatic Product Science and Technology Co. Ltd; Weihai 264200 China
| | - Feng You
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
| | - Yanfeng Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
| | - Daoyuan Ma
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
| | - Jun Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology; Chinese Academy of Sciences; Qingdao 266071 China
- Laboratory for Marine Biology and Biotechnology; Qingdao National Laboratory for Marine Science and Technology; Qingdao 266071 China
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Hamasaki M, Takeuchi Y, Yazawa R, Yoshikawa S, Kadomura K, Yamada T, Miyaki K, Kikuchi K, Yoshizaki G. Production of Tiger Puffer Takifugu rubripes Offspring from Triploid Grass Puffer Takifugu niphobles Parents. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2017; 19:579-591. [PMID: 28942506 DOI: 10.1007/s10126-017-9777-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 09/11/2017] [Indexed: 06/07/2023]
Abstract
The tiger puffer Takifugu rubripes is one of the most popular aquacultural fish; however, there are two major obstacles to selective breeding. First, they have a long generation time of 2 or 3 years until maturation. Second, the parental tiger puffer has a body size (2-5 kg) much larger than average market size (0.6-1.0 kg). The grass puffer Takifugu niphobles is closely related to the tiger puffer and matures in half the time. Furthermore, grass puffer can be reared in small areas since their maturation weight is about 1/150 that of mature tiger puffer. Therefore, to overcome the obstacles of maturation size and generation time of tiger puffer, we generated surrogate grass puffer that can produce tiger puffer gametes through germ cell transplantation. Approximately 5000 tiger puffer testicular cells were transplanted into the peritoneal cavity of triploid grass puffer larvae at 1 day post hatching. When the recipient fish matured, both males and females produced donor-derived gametes. Through their insemination, we successfully produced donor-derived tiger puffer offspring presenting the same body surface dot pattern, number of dorsal fin rays, and DNA fingerprint as those of the donor tiger puffer, suggesting that the recipient grass puffer produced functional eggs and sperm derived from the donor tiger puffer. Although fine tunings are still needed to improve efficiencies, surrogate grass puffer are expected to accelerate the breeding process of tiger puffer because of their short generation time and small body size.
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Affiliation(s)
- Masaomi Hamasaki
- Nagasaki Prefectural Institute of Fisheries, 1551-4 Taira, Nagasaki-shi, Nagasaki, 851-2213, Japan.
| | - Yutaka Takeuchi
- Division of Fisheries Resource and Sciences, Faculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima-shi, Kagoshima, 890-0056, Japan
| | - Ryosuke Yazawa
- Department Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
| | - Souta Yoshikawa
- Nagasaki Prefectural Institute of Fisheries, 1551-4 Taira, Nagasaki-shi, Nagasaki, 851-2213, Japan
| | - Kazushi Kadomura
- Nagasaki Prefectural Institute of Fisheries, 1551-4 Taira, Nagasaki-shi, Nagasaki, 851-2213, Japan
| | - Toshiyuki Yamada
- Nagasaki Prefectural Institute of Fisheries, 1551-4 Taira, Nagasaki-shi, Nagasaki, 851-2213, Japan
| | - Kadoo Miyaki
- Nagasaki Prefectural Institute of Fisheries, 1551-4 Taira, Nagasaki-shi, Nagasaki, 851-2213, Japan
| | - Kiyoshi Kikuchi
- Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, University of Tokyo, 2971-4 Bentenjima, Maisaka, Hamamatsu-shi, Shizuoka, 431-0214, Japan
| | - Goro Yoshizaki
- Department Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
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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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Li Q, Fujii W, Naito K, Yoshizaki G. Application of dead end-knockout zebrafish as recipients of germ cell transplantation. Mol Reprod Dev 2017; 84:1100-1111. [PMID: 28731265 DOI: 10.1002/mrd.22870] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 07/17/2017] [Indexed: 01/21/2023]
Abstract
Germ cell transplantation is a promising technology for the propagation of endangered or valuable fishes. In this technique, sterile male and female recipient fish are injected with donor germ cells so they can produce viable gametes derived from the donor cells. The dead end (dnd) gene is involved in the migration of primordial germ cells; therefore, dnd-knockout zebrafish are expected to be germ-cell-free, making them suitable recipients for germ cell transplantation. dnd mutants were produced by microinjecting 2 nl of 10 ng/μl cRNAs encoding zinc finger nucleases against dnd into the blastodisc of zebrafish embryos before the cell- cleavage stage. One of the resulting founder males was mated with a wild-type female, and produced heterozygous mutants in the F1 generation. Mating of these F1 mutants produced an F2 generation with approximately 25% of the clutch being homozygous mutant (dnd-knockout) male, and lacking germ cells (as confirmed by expression analyses of vasa). The resulting dnd-knockout zebrafish males were tested for suitability as germ cell transplantation recipients by intraperitoneal transplantation of testicular cells prepared from vasa-gfp zebrafish. GFP-positive germ cells incorporated into the germ-cell-free gonads of the dnd-knockout recipients matured into functional sperm. Progeny tests revealed that the sperm from these dnd-knockout recipients were derived entirely from donor cells. Thus, we demonstrated that homozygous dnd mutants became germ-cell-free males that are able to nurse donor-derived germ cells.
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Affiliation(s)
- Qian Li
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Wataru Fujii
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Kunihiko Naito
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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33
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Ichida K, Kise K, Morita T, Yazawa R, Takeuchi Y, Yoshizaki G. Flow-cytometric enrichment of Pacific bluefin tuna type A spermatogonia based on light-scattering properties. Theriogenology 2017; 101:91-98. [PMID: 28708521 DOI: 10.1016/j.theriogenology.2017.06.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/31/2017] [Accepted: 06/20/2017] [Indexed: 11/20/2022]
Abstract
We previously established surrogate broodstock in which the donor germ cells transplanted into the peritoneal cavities of xenogeneic recipients were capable of developing into functional eggs and sperm in teleost fish. In this transplantation system, only the undifferentiated germ cells such as type A spermatogonia (ASG) or a portion of the ASG population were capable of being incorporated into the genital ridges of the recipients and undergo gametogenesis. Therefore, the use of enriched ASGs can be expected to achieve efficient donor-cell incorporation. Here, we established a method of isolation and enrichment of the ASG of Pacific bluefin tuna using flow cytometry. Whole testicular cell suspensions were fractionated by forward and side scatter properties, following which ASGs were enriched in a fraction in which the forward scatter signal was relatively high and side scatter signal was relatively low. The diameter of sorted cells using the fraction was identical to the size of ASGs observed in histological analysis, and these cells also expressed the vasa gene. In addition, we succeeded in applying this method to several maturation stages of Pacific bluefin tuna. Since this method was based on light-scattering characteristics of ASGs, it can potentially be applied to various teleosts. We expect that this method can contribute to the production of seeds of Pacific bluefin tuna using surrogate broodstock.
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Affiliation(s)
- Kensuke Ichida
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan
| | - Kazuyoshi Kise
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan
| | - Tetsuro Morita
- Central Research Laboratory, Nippon Suisan Kaisha, Ltd, 1-32-3 Nanakuni, Hachioji, Tokyo 192-0991, Japan
| | - Ryosuke Yazawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan
| | - Yutaka Takeuchi
- Division of Fisheries Resource and Sciences, Faculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima City, Kagoshima 890-0056, Japan.
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan Minato-ku, Tokyo 108-8477, Japan
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34
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Tonelli FMP, Lacerda SMSN, Tonelli FCP, Costa GMJ, de França LR, Resende RR. Progress and biotechnological prospects in fish transgenesis. Biotechnol Adv 2017; 35:832-844. [PMID: 28602961 DOI: 10.1016/j.biotechadv.2017.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/04/2017] [Accepted: 06/05/2017] [Indexed: 12/14/2022]
Abstract
The history of transgenesis is marked by milestones such as the development of cellular transdifferentiation, recombinant DNA, genetic modification of target cells, and finally, the generation of simpler genetically modified organisms (e.g. bacteria and mice). The first transgenic fish was developed in 1984, and since then, continuing technological advancements to improve gene transfer have led to more rapid, accurate, and efficient generation of transgenic animals. Among the established methods are microinjection, electroporation, lipofection, viral vectors, and gene targeting. Here, we review the history of animal transgenesis, with an emphasis on fish, in conjunction with major developments in genetic engineering over the past few decades. Importantly, spermatogonial stem cell modification and transplantation are two common techniques capable of revolutionizing the generation of transgenic fish. Furthermore, we discuss recent progress and future biotechnological prospects of fish transgenesis, which has strong applications for the aquaculture industry. Indeed, some transgenic fish are already available in the current market, validating continued efforts to improve economically important species with biotechnological advancements.
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Affiliation(s)
- Fernanda M P Tonelli
- Laboratório de Sinalização Celular e Nanobiotecnologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Instituto Nanocell, Divinópolis, MG, Brazil
| | - Samyra M S N Lacerda
- Laboratório de Biologia Celular, Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Flávia C P Tonelli
- Laboratório de Sinalização Celular e Nanobiotecnologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Guilherme M J Costa
- Laboratório de Biologia Celular, Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luiz Renato de França
- Laboratório de Biologia Celular, Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, AM, Brazil.
| | - Rodrigo R Resende
- Laboratório de Sinalização Celular e Nanobiotecnologia, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Instituto Nanocell, Divinópolis, MG, Brazil.
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35
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Ye H, Li CJ, Yue HM, Du H, Yang XG, Yoshino T, Hayashida T, Takeuchi Y, Wei QW. Establishment of intraperitoneal germ cell transplantation for critically endangered Chinese sturgeon Acipenser sinensis. Theriogenology 2017; 94:37-47. [PMID: 28407859 DOI: 10.1016/j.theriogenology.2017.02.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 02/11/2017] [Accepted: 02/11/2017] [Indexed: 01/28/2023]
Abstract
Recent progress in germ cell transplantation techniques in fish has paved the way for the conservation of endangered species. Here, we developed an intraperitoneal germ cell transplantation procedure using Chinese and Dabry's sturgeon as donor and recipient species, respectively. Histological analysis revealed that primordial germ cells migrated on the peritoneal wall at 16 days post-hatch (dph) in Dabry's sturgeon. The genital ridges of Dabry's sturgeon (recipient) first formed at 28 dph, suggesting that for successful colonization of donor germ cells in the recipient gonads, the transplantation should be performed earlier than this age. Sexual dimorphism of gonadal structure was first observed at 78 dph. Gonadal germ cell proliferation was not seen in either sex during this period. Immunohistochemistry using the anti-Vasa antibody found that donor testes from 2-year-old Dabry's sturgeon mainly consisted of single- or paired-type A spermatogonia, while donor ovaries from 11.5-year-old Chinese sturgeon had perinucleolus stage oocytes and clusters of oogonia. Donor cells isolated from Dabry's sturgeon testes or Chinese sturgeon ovary labeled with PKH26 fluorescent dye were transplanted into the peritoneal cavity of the 7- or 8-dph Dabry's sturgeon larvae. More than 90% and 70% of transplanted larvae survived after 2 days post-transplantation (dpt) and 51 dpt, respectively. At 51 dpt, PKH26-labeled cells exhibiting germ cell-specific nuclear morphology and diameter were observed in excised recipient gonads by fluorescent and confocal microscopy. The colonization rate of allogeneic testicular germ cell transplantation (Group 1) was 70%, while that of two batches of xenogeneic ovarian germ cell transplantation (Group 2 and Group 3) were 6.7% and 40%, respectively. The ratio of colonized germ cells to endogenous germ cells was 11.96%, 5.35% and 3.56% for Group 1, Group 2 and Group 3, respectively. Thus, we established a germ cell transplantation technique for the critically endangered Chinese sturgeon using the most closely related species as a recipient and demonstrated the successful preparation of transplantable female germ cells from aged adult Chinese sturgeon.
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Affiliation(s)
- Huan Ye
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Institute of Hydrobiology, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Wuhan, 430072, China; Research Center for Advanced Science and Technology, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama-shi, Chiba, 294-0308, Japan
| | - Chuang-Ju Li
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, 214081, China
| | - Hua-Mei Yue
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, 214081, China
| | - Hao Du
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, 214081, China
| | - Xiao-Ge Yang
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Institute of Hydrobiology, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Wuhan, 430072, China
| | - Tasuku Yoshino
- Research Center for Advanced Science and Technology, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama-shi, Chiba, 294-0308, Japan
| | - Takao Hayashida
- Research Center for Advanced Science and Technology, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama-shi, Chiba, 294-0308, Japan
| | - Yutaka Takeuchi
- Research Center for Advanced Science and Technology, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama-shi, Chiba, 294-0308, Japan.
| | - Qi-Wei Wei
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China; Institute of Hydrobiology, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Wuhan, 430072, China; Freshwater Fisheries Research Center, Chinese Academy of Fisheries Science, Wuxi, 214081, China.
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Boonanuntanasarn S, Bunlipatanon P, Ichida K, Yoohat K, Mengyu O, Detsathit S, Yazawa R, Yoshizaki G. Characterization of a vasa homolog in the brown-marbled grouper (Epinephelus fuscoguttatus) and its expression in gonad and germ cells during larval development. FISH PHYSIOLOGY AND BIOCHEMISTRY 2016; 42:1621-1636. [PMID: 27406385 DOI: 10.1007/s10695-016-0245-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 06/01/2016] [Indexed: 06/06/2023]
Abstract
The vasa gene is specifically expressed in the germ cell lineage, and its expression has been used to study germline development in many organisms, including fishes. In this study, we cloned and characterized vasa as Efu-vasa in the brown-marbled grouper (Epinephelus fuscoguttatus). Efu-vasa contained predicted regions that shared consensus motifs with the vasa family in teleosts, including arginine- and glycine-rich repeats, ATPase motifs, and a DEAD box. Phylogenetic-tree construction using various DEAD-box proteins confirmed that Efu-vasa was clustered in the vasa family. Efu-vasa mRNA was detectable only in gonads, by reverse transcription polymerase chain reaction. Primordial germ cells (PGCs) during early gonad development in larvae were characterized by histological examination and in situ hybridization using an Efu-vasa antisense probe. Migrating PGCs were found in larvae at 9-21 days post-hatching, and rapid proliferation of PGCs was initiated in 36 days post-hatching. These findings provide a valuable basis for optimizing the developmental stages for germ cell transplantation in order to produce surrogate broodstock, which may help in the production of larvae of large and endangered grouper species.
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Affiliation(s)
- Surintorn Boonanuntanasarn
- School of Animal Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima, 30000, Thailand.
| | - Paiboon Bunlipatanon
- Krabi Coastal Fisheries Research and Development Center, 141 Moo 6, Saithai, Muang, Krabi, 81000, Thailand
| | - Kensuke Ichida
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-Ku, Tokyo, 108-8477, Japan
| | - Kirana Yoohat
- School of Animal Production Technology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima, 30000, Thailand
| | - Ornkanya Mengyu
- Krabi Coastal Fisheries Research and Development Center, 141 Moo 6, Saithai, Muang, Krabi, 81000, Thailand
| | - Samart Detsathit
- Krabi Coastal Fisheries Research and Development Center, 141 Moo 6, Saithai, Muang, Krabi, 81000, Thailand
| | - Ryosuke Yazawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-Ku, Tokyo, 108-8477, Japan
| | - Goro Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-Ku, Tokyo, 108-8477, Japan
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37
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Bar I, Smith A, Bubner E, Yoshizaki G, Takeuchi Y, Yazawa R, Chen BN, Cummins S, Elizur A. Assessment of yellowtail kingfish (Seriola lalandi) as a surrogate host for the production of southern bluefin tuna (Thunnus maccoyii) seed via spermatogonial germ cell transplantation. Reprod Fertil Dev 2016. [DOI: 10.1071/rd15136] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Germ cell transplantation is an innovative technology for the production of interspecies surrogates, capable of facilitating easier and more economical management of large-bodied broodstock, such as the bluefin tuna. The present study explored the suitability of yellowtail kingfish (Seriola lalandi) as a surrogate host for transplanted southern bluefin tuna (Thunnus maccoyii) spermatogonial cells to produce tuna donor-derived gametes upon sexual maturity. Germ cell populations in testes of donor T. maccoyii males were described using basic histology and the molecular markers vasa and dead-end genes. The peripheral area of the testis was found to contain the highest proportions of dead-end-expressing transplantable Type A spermatogonia. T. maccoyii Type A spermatogonia-enriched preparations were transplanted into the coelomic cavity of 6–10-day-old post-hatch S. lalandi larvae. Fluorescence microscopy and polymerase chain reaction analysis detected the presence of tuna cells in the gonads of the transplanted kingfish fingerlings at 18, 28, 39 and 75 days after transplantation, indicating that the transplanted cells migrated to the genital ridge and had colonised the developing gonad. T. maccoyii germ cell-derived DNA or RNA was not detected at later stages, suggesting that the donor cells were not maintained in the hosts’ gonads.
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Shang M, Su B, Lipke EA, Perera DA, Li C, Qin Z, Li Y, Dunn DA, Cek S, Peatman E, Dunham RA. Spermatogonial stem cells specific marker identification in channel catfish, Ictalurus punctatus and blue catfish, I. furcatus. FISH PHYSIOLOGY AND BIOCHEMISTRY 2015; 41:1545-1556. [PMID: 26251285 DOI: 10.1007/s10695-015-0106-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 07/27/2015] [Indexed: 06/04/2023]
Abstract
Testicular germ cells of channel catfish, Ictalurus punctatus, and blue catfish, I. furcatus were separated into four layers with Percoll density gradient centrifugation, containing different cell types (40% in the first layer were spermatogonial stem cells, SSCs). Expression of seventeen genes was analyzed for cells from different layers by real-time quantitative PCR. Pfkfb4, Urod, Plzf, Integrin6, IntegrinV, Thy1 and Cdh1 genes showed the same expression change pattern in both channel and blue catfish as these genes were down-regulated in the spermatocytes and even more so in spermatids. Plzf and Integrin6 had especially high expression in SSCs and can be used as SSCs specific markers. Sox2 gene was up-regulated in spermatocytes and even more highly up-regulated in spermatids, which indicated it could be a spermatid marker. In contrast to channel catfish, Id4, Smad5 and Prdm14 gene expressions were strongly down-regulated in spermatocyte cells, but up-regulated in spermatid cells in blue catfish. Smad5 gene was down-regulated in spermatocytes, but up-regulated in both spermatogonia and spermatids, allowing identification as a marker for spermatocytes in blue catfish. Oct4, Id4, Gfrα2, Pum2 and Prdm14 genes showed different expression patterns in the testicular germ cells of channel and blue catfish. This may be a partial explanation to the differing responses of channel catfish and blue catfish to induced spawning technologies. The SSCs specific markers can be used for further SSCs labeling, which can increase the SSCs sorting efficiency and be applied in various studies involving SSCs and other germ cells.
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Affiliation(s)
- Mei Shang
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
- Key Laboratory of Freshwater Aquatic Biotechnology and Genetic Breeding, Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Ministry of Agriculture, Harbin, 150070, China.
| | - Baofeng Su
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
- Key Laboratory of Freshwater Aquatic Biotechnology and Genetic Breeding, Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Ministry of Agriculture, Harbin, 150070, China
| | - Elizabeth A Lipke
- Department of Chemical Engineering, Auburn University, Auburn, AL, 36849, USA
| | - Dayan A Perera
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
- Gus R. Douglass Land-Grant Institute, West Virginia State University, Institute, WV, 25112, USA
| | - Chao Li
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Zhenkui Qin
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Yun Li
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - David A Dunn
- Department of Chemical Engineering, Auburn University, Auburn, AL, 36849, USA
- Department of Biological Sciences, State University of New York at Oswego, Oswego, NY, 13126-3599, USA
| | - Sehriban Cek
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
- Faculty of Marine Science and Technology, Mustafa Kemal University, 31200, İskenderun, Hatay, Turkey
| | - Eric Peatman
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Rex A Dunham
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA.
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Morita T, Morishima K, Miwa M, Kumakura N, Kudo S, Ichida K, Mitsuboshi T, Takeuchi Y, Yoshizaki G. Functional Sperm of the Yellowtail (Seriola quinqueradiata) Were Produced in the Small-Bodied Surrogate, Jack Mackerel (Trachurus japonicus). MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2015; 17:644-54. [PMID: 26239188 DOI: 10.1007/s10126-015-9657-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 06/12/2015] [Indexed: 05/07/2023]
Abstract
Production of xenogeneic gametes from large-bodied, commercially important marine species in closely related smaller surrogates with short generation times may enable rapid domestication of the targeted species. In this study, we aimed to produce gametes of Japanese yellowtail (Seriola quinqueradiata) using jack mackerel (Trachurus japonicus) as a surrogate with a smaller body size and shorter maturation period. Donor spermatogonia were collected from the testes of yellowtail males and transferred into the peritoneal cavity of 10- and 12-day-old jack mackerel larvae. Twenty days later, 59.5% of the recipients survived of which 88.2% had donor-derived germ cells in their gonads. One year later, genomic DNA templates were prepared from the semen of 96 male recipients and subjected to polymerase chain reaction (PCR) analyses using primers specific for the yellowtail vasa sequence, resulting in the detection of positive signals in semen from two recipients. The milt collected from the recipients was used for fertilization with yellowtail eggs. Of eight hatchlings obtained from the crosses, two were confirmed to be derived from donor yellowtail by DNA markers, although the others were gynogenetic diploids. These findings indicate that it is possible to produce donor-derived sperm in xenogeneic recipients with a smaller body size and shorter generation time by transplanting spermatogonia. Thus, the xenogeneic transplantation of spermatogonia might be a potential tool to produce gametes of large-bodied, commercially important fish, although the efficiency of the method requires further improvement. This is the first report demonstrating that donor-derived sperm could be produced in xenogeneic recipient via spermatogonial transplantation in carangid fishes.
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Affiliation(s)
- Tetsuro Morita
- Central Research Laboratory, Nippon Suisan Kaisha, Ltd., 1-32-3 Nanakuni, Hachioji-shi, Tokyo, 192-0991, Japan,
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The effects of temperature and busulfan (Myleran) on the yellowtail tetra Astyanax altiparanae (Pisces, Characiformes) spermatogenesis. Theriogenology 2015; 84:1033-42. [PMID: 26164805 DOI: 10.1016/j.theriogenology.2015.06.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/02/2015] [Accepted: 06/10/2015] [Indexed: 11/22/2022]
Abstract
We aimed to standardize a protocol to suppress spermatogenesis in the characiform fish, Astyanax altiparanae, for future use as a host in germ cell transplant research, opening opportunities for a range of studies, such as spermatogenesis analyses and transgenesis because this species presents livestock characteristics to be used as a biological model. The effects of the chemotherapeutic busulfan (formulated as Myleran), which is used as medicine, therefore not as toxic to humans manipulation as analytical grade busulfan (Fluka) used in previous studies, were evaluated at physiological temperature of 28 °C, ideal for growth and reproduction of A altiparanae, and also at increased temperature 35 °C. The temperature groups were divided into three treatment groups: busulfan, DMSO only, and an untreated control. Macroscopic, histologic, stereological, and ultrastructure analysis showed that, at 28 °C, busulfan did not cause depletion of germ cells in A altiparanae. However, at 35 °C, sterilization was observed 3 weeks after the initial application. Similar results were obtained with maintenance of fish at 35 °C for a longer period with no accompanying Myleran treatment. This procedure allows reduction in stress and lower mortality resulting from manipulation during busulfan injection and is also suitable for mass treatment because large numbers of fish can be incubated in warm water.
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Fan L, Jiang J, Gao J, Song H, Liu J, Yang L, Li Z, Chen Y, Zhang Q, Wang X. Identification and Characterization of a PRDM14 Homolog in Japanese Flounder (Paralichthys olivaceus). Int J Mol Sci 2015; 16:9097-118. [PMID: 25915026 PMCID: PMC4463580 DOI: 10.3390/ijms16059097] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/10/2015] [Accepted: 04/13/2015] [Indexed: 11/27/2022] Open
Abstract
PRDM14 is a PR (PRDI-BF1-RIZ1 homologous) domain protein with six zinc fingers and essential roles in genome-wide epigenetic reprogramming. This protein is required for the establishment of germ cells and the maintenance of the embryonic stem cell ground state. In this study, we cloned the full-length cDNA and genomic DNA of the Paralichthys olivaceus prdm14 (Po-prdm14) gene and isolated the 5' regulatory region of Po-prdm14 by whole-genome sequencing. Peptide sequence alignment, gene structure analysis, and phylogenetic analysis revealed that Po-PRDM14 was homologous to mammalian PRDM14. Results of real-time quantitative polymerase chain reaction amplification (RT-qPCR) and in situ hybridization (ISH) in embryos demonstrated that Po-prdm14 was highly expressed between the morula and late gastrula stages, with its expression peaking in the early gastrula stage. Relatively low expression of Po-prdm14 was observed in the other developmental stages. ISH of gonadal tissues revealed that the transcripts were located in the nucleus of the oocytes in the ovaries but only in the spermatogonia and not the spermatocytes in the testes. We also presume that the Po-prdm14 transcription factor binding sites and their conserved binding region among vertebrates. The combined results suggest that Po-PRDM14 has a conserved function in teleosts and mammals.
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Affiliation(s)
- Lin Fan
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Jiajun Jiang
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Jinning Gao
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Huayu Song
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Jinxiang Liu
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Likun Yang
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Zan Li
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Yan Chen
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Quanqi Zhang
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
| | - Xubo Wang
- Key Laboratory of Marine Genetics and Breeding (Ocean University of China), Ministry of Education, Qingdao 266003, China.
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Fernández JA, Bubner EJ, Takeuchi Y, Yoshizaki G, Wang T, Cummins SF, Elizur A. Primordial germ cell migration in the yellowtail kingfish (Seriola lalandi) and identification of stromal cell-derived factor 1. Gen Comp Endocrinol 2015; 213:16-23. [PMID: 25708429 DOI: 10.1016/j.ygcen.2015.02.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 02/07/2015] [Accepted: 02/12/2015] [Indexed: 10/24/2022]
Abstract
Primordial germ cells (PGCs) are progenitors of the germ cell lineage, giving rise to either spermatogonia or oogonia after the completion of gonadal differentiation. Currently, there is little information on the mechanism of PGCs migration leading to the formation of the primordial gonad in perciform fish. Yellowtail kingfish (Seriola lalandi) (YTK) (order Perciforms) inhabit tropical and temperate waters in the southern hemisphere. Fundamental details into the molecular basis of larval development in this species can be easily studied in Australia, as they are commercially cultured and readily available. In this study, histological analysis of YTK larvae revealed critical time points for the migration of PGCs to the genital ridge, resulting in the subsequent development of the primordial gonad. In YTK larvae at 3, 5, 7 and 10 days post hatch (DPH), PGCs were not yet enclosed by somatic cells, indicating the primordial gonad had not yet started to form. While at 15, 18 and 20 DPH PGCs had already settled at the genital ridge and started to become enclosed by somatic cells indicating the primordial gonad had started to develop. A higher number of PGCs were observed in the larvae at 15 and 18 DPH indicating PGCs proliferation, which corresponds with them becoming enclosed by the somatic cells. Directional migration of PGCs toward the genital ridge is a critical event in the subsequent development of a gonad. In zebrafish, mouse and chicken, stromal-cell derived factor (SDF1) signalling is one of the key molecules for PGC migration. We subsequently isolated from YTK the SDF1 (Slal-SDF1) gene, which encodes for a 98-residue precursor protein with a signal peptide at the N-terminus. There is spatial conservation between fish species of four cysteine residues at positions C9, C11, C34 and C49, expected to form disulphide bonds and stabilize the SDF structure. In YTK, Slal-SDF1 gene expression analyses shows that this gene is expressed in larvae from 1 to 22 DPH and demonstrates distinct spatial localisation in the larvae at 7 DPH. These results provide a platform for further studies into the molecular machinery of PGC migration in yellowtail kingfish, as well as other perciform fish species.
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Affiliation(s)
- J A Fernández
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, Queensland, Australia
| | - E J Bubner
- School of Biological Science, Lincoln Marine Science Centre, Flinders University, Port Lincoln, South Australia, Australia; Australia Seafood Corporative Research Centre, Bedford Park, South Australia, Australia
| | - Y Takeuchi
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - G Yoshizaki
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - T Wang
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, Queensland, Australia
| | - S F Cummins
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, Queensland, Australia
| | - A Elizur
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore, Queensland, Australia.
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Lacerda SMDSN, Costa GMJ, de França LR. Biology and identity of fish spermatogonial stem cell. Gen Comp Endocrinol 2014; 207:56-65. [PMID: 24967950 DOI: 10.1016/j.ygcen.2014.06.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 06/11/2014] [Accepted: 06/15/2014] [Indexed: 12/29/2022]
Abstract
Although present at relatively low number in the testis, spermatogonial stem cells (SSCs) are crucial for the establishment and maintenance of spermatogenesis in eukaryotes and, until recently, those cells were investigated in fish using morphological criteria. The isolation and characterization of these cells in fish have been so far limited by the lack of specific molecular markers, hampering the high SSCs biotechnological potential for aquaculture. However, some highly conserved vertebrate molecular markers, such as Gfra1 and Pou5f1/Oct4, are now available representing important candidates for studies evaluating the regulation of SSCs in fish and even functional investigations using germ cells transplantation. A technique already used to demonstrate that, different from mammals, fish germ stem cells (spermatogonia and oogonia) present high sexual plasticity that is determined by the somatic microenvironment. As relatively well established in mammals, and demonstrated in zebrafish and dogfish, this somatic environment is very important for the preferential location and regulation of SSCs. Importantly, a long-term in vitro culture system for SSCs has been now established for some fish species. Therefore, besides the aforementioned possibilities, such culture system would allow the development of strategies to in vitro investigate key regulatory and functional aspects of germline stem cells (ex: self-renewal and/or differentiation) or to amplify SSCs of rare, endangered, or commercially valuable fish species, representing an important tool for transgenesis and the development of new biotechnologies in fish production.
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Affiliation(s)
| | - Guilherme Mattos Jardim Costa
- Laboratory of Cellular Biology, Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Luiz Renato de França
- Laboratory of Cellular Biology, Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil.
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Farlora R, Hattori-Ihara S, Takeuchi Y, Hayashi M, Octavera A, Yoshizaki G. Intraperitoneal germ cell transplantation in the Nile tilapia Oreochromis niloticus. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2014; 16:309-320. [PMID: 24096828 DOI: 10.1007/s10126-013-9551-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 09/16/2013] [Indexed: 06/02/2023]
Abstract
Germ cell transplantation offers promising applications in finfish aquaculture and the preservation of endangered species. Here, we describe an intraperitoneal spermatogonia transplantation procedure in the Nile tilapia Oreochromis niloticus. Through histological analysis of early gonad development, we first determined the best suitable stage at which exogenous germ cells should be transplanted into the recipients. For the transplantation procedure, donor testes from a transgenic Nile tilapia strain carrying the medaka β-actin/enhanced green fluorescent protein (EGFP) gene were subjected to enzymatic dissociation. These testicular cells were then stained with PKH26 and microinjected into the peritoneal cavity of the recipient fish. To confirm colonization of the donor-derived germ cells, the recipient gonads were examined by fluorescent and confocal microscopy. PKH26-labeled cells exhibiting typical spermatogonial morphology were incorporated into the recipient gonads and were not rejected within 22 days posttransplantation. Long-term survival of transgenic donor-derived germ cells was then verified in the gonads of 5-month-old recipients and in the milt and vitelogenic oocytes of 1-year-old recipients, by means of PCR using EGFP-specific primers. EGFP-positive milt from adult male recipients was used to fertilize non-transgenic oocytes and produced transgenic offspring expressing the donor-derived phenotype. These results imply that long-term survival, proliferation, and differentiation of the donor-derived spermatogonia into vitelogenic oocytes and functional spermatozoa are all possible. Upon further improvements in the transplantation efficiency, this intraperitoneal transplantation system could become a valuable tool in the conservation of genetic resources for cichlid species.
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Affiliation(s)
- Rodolfo Farlora
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepcion, Concepción, Chile
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Majhi SK, Hattori RS, Rahman SM, Strüssmann CA. Surrogate production of eggs and sperm by intrapapillary transplantation of germ cells in cytoablated adult fish. PLoS One 2014; 9:e95294. [PMID: 24748387 PMCID: PMC3991631 DOI: 10.1371/journal.pone.0095294] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 03/25/2014] [Indexed: 01/15/2023] Open
Abstract
Germ cell transplantation (GCT) is a promising assisted reproductive technology for the conservation and propagation of endangered and valuable genetic resources. In teleost fish, GCT in adult gonads has been achieved only in male recipients, limiting greatly the usefulness of this technique in situations where both sexes need equal and timely attention for conservation and/or propagation. Here we describe a simplified GCT approach that ultimately leads to production of donor-derived eggs and sperm in considerably short time. Donor germ cells isolated from young pejerrey Odontesthes bonariensis (Atherinopsidae) were transplanted non-surgically through the genital papilla into the sexually mature gonads of Patagonian pejerrey O. hatcheri recipients whose gonads have been depleted of endogenous GCs by heat (26°C) and chemical treatment (four doses of Busulfan at 30 mg/kg and 40 mg/kg for females and males, respectively). Transplanted spermatogonial and oogonial cells were able to recolonize the recipients' gonads and produce functional donor origin eggs and sperm within 7 months from the GCT. We confirmed the presence of donor-derived gametes by PCR in 17% and 5% of the surrogate O. hatcheri fathers and mothers, respectively. The crosses between surrogate fathers and O. bonariensis mothers yielded 12.6-39.7% pure O. bonariensis and that between a surrogate mother and an O. bonariensis father yielded 52.2% pure O. bonariensis offspring. Our findings confirm that transplantation of germ cells into sexually competent adult fish by non-surgical methods allows the production of functional donor-derived eggs and sperm in a considerably short time. The methods described here could play a vital role in conservation and rapid propagation of endangered fish genetic resources.
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Affiliation(s)
- Sullip Kumar Majhi
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Minato, Tokyo, Japan
- Division of Molecular Biology & Biotechnology, National Bureau of Fish Genetic Resources, Dilkhusa, Lucknow, India
- * E-mail:
| | - Ricardo Shohei Hattori
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Minato, Tokyo, Japan
| | - Sheikh Mustafizur Rahman
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Minato, Tokyo, Japan
| | - Carlos Augusto Strüssmann
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Minato, Tokyo, Japan
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Herrid M, McFarlane JR. Application of testis germ cell transplantation in breeding systems of food producing species: a review. Anim Biotechnol 2014; 24:293-306. [PMID: 23947666 DOI: 10.1080/10495398.2013.785431] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A major benefit of advanced reproduction technologies (ART) in animal breeding is the ability to produce more progeny per individual parent. This is particularly useful with animals of high genetic merit. Testis germ cell transplantation (TGCT) is emerging as a novel reproductive technology with application in animal breeding systems, including the potential for use as an alternative to artificial insemination (AI), an alternative to transgenesis, part of an approach to reducing generation intervals, or an approach toward development of interspecies hybrids. There is one major difference in TGCT between rodents and some other species associated with immunotolerance in heterologous transplantation. In particular, livestock and aquatic species do not require an immunesuppression procedure to allow donor cell survival in recipient testis. Testicular stem cells from a genetically elite individual transplanted into others can develop and produce a surrogate male-an animal that produces the functional sperm of the original individual. Spermatozoa produced from testis stem cells are the only cells in the body of males that can transmit genetic information to the offspring. The isolation and genetic manipulation of testis stem cells prior to transplantation has been shown to create transgenic animals. However, the current success rate of the transplantation procedure in livestock and aquatic species is low, with a corresponding small proportion of donor spermatozoa in the recipient's semen. The propagation of donor cells in culture and preparation of recipient animals are the two main factors that limit the commercial application of this technique. The current paper reviews and compares recent progress and examines the difficulties of TGCT in both livestock and aquatic species, thereby providing new insights into the application of TGCT in food producing animals.
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Affiliation(s)
- Muren Herrid
- a Center for Bioactive Discovery in Health and Aging, University of New England , Armidale , Australia
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47
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Pacchiarini T, Sarasquete C, Cabrita E. Development of interspecies testicular germ-cell transplantation in flatfish. Reprod Fertil Dev 2014; 26:690-702. [DOI: 10.1071/rd13103] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 04/22/2013] [Indexed: 11/23/2022] Open
Abstract
Interspecific testicular germ cell (TGC) transplantation was investigated in two commercial flatfish species. Testes from donor species (Senegalese sole) were evaluated using classical histological techniques (haematoxylin–eosin staining and haematoxylin–light green–orange G–acid fuchsine staining), in situ hybridisation and immunohistochemical analysis. Both Ssvasa1–2 mRNAs and SsVasa protein allowed the characterisation of TGCs, confirming the usefulness of the vasa gene in the detection of Senegalese sole TGCs. Xenogenic transplants were carried out using TGCs from one-year-old Senegalese sole into turbot larvae. Propidium iodide–SYBR-14 and 4′,6′-diamidino-2-phenylindole (DAPI) staining showed that 87.98% of the extracted testicular cells were viable for microinjection and that 15.63% of the total recovered cells were spermatogonia. The vasa gene was characterised in turbot recipients using cDNA cloning. Smvasa mRNA was confirmed as a germ cell-specific molecular marker in this species. Smvasa expression analysis during turbot ontogeny was carried out before Senegalese sole TGC transplants into turbot larvae. Turbot larvae at 18 days after hatching (DAH) proved to be susceptible to manipulation procedures. High survival rates (83.75 ± 15.90 – 100%) were obtained for turbot larvae at 27, 34 and 42 DAH. These data highlight the huge potential of this species for transplantation studies. Quantitative PCR was employed to detect Senegalese sole vasa mRNAs (Ssvasa1–2) in the recipient turbot larvae. The Ssvasa mRNAs showed a significant increase in relative expression in 42-DAH microinjected larvae three weeks after treatment, showing the proliferation of Senegalese sole spermatogonia in transplanted turbot larvae.
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48
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Weber GM, Lee CS. Current and future assisted reproductive technologies for fish species. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 752:33-76. [PMID: 24170354 DOI: 10.1007/978-1-4614-8887-3_3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The Food and Agriculture Organization of the United Nations (FAO) estimates that in 2012 aquaculture production of fish will meet or exceed that of the capture fisheries for the first time. Thus, we have just turned the corner from a predominantly hunting gathering approach to meeting our nutritional needs from fish, to a farming approach. In 2012, 327 finfish species and five hybrids were covered by FAO aquaculture statistics, although farming of carps, tilapias, salmonids, and catfishes account for most of food-fish production from aquaculture. Although for most major species at least part of production is based on what might be considered domesticated animals, only limited production in most species is based on farming of improved lines of fish or is fully independent of wild seedstock. Consistent with the infancy of most aquaculture industries, much of the development and implementation of reproductive technologies over the past 100 years has been directed at completion of the life cycle in captivity in order to increase seed production and begin the process of domestication. The selection of species to farm and the emphasis of selective breeding must also take into account other ways to modify performance of an animal. Reproductive technologies have also been developed and implemented to affect many performance traits among fishes. Examples include technologies to control gender, alter time of sexual maturation, and induce sterilization. These technologies help take advantage of sexually dimorphic growth, overcome problems with growth performance and flesh quality associated with sexual maturation, and genetic containment. Reproductive technologies developed to advance aquaculture and how these technologies have been implemented to advance various sectors of the aquaculture industry are discussed. Finally, we will present some thoughts regarding future directions for reproductive technologies and their applications in finfish aquaculture.
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Affiliation(s)
- Gregory M Weber
- National Center for Cool and Coldwater Aquaculture, ARS/USDA, 11861 Leetown Road, Kearneysville, WV, 25430, USA,
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49
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Yazawa R, Takeuchi Y, Morita T, Ishida M, Yoshizaki G. The Pacific bluefin tuna (Thunnus orientalis) dead end gene is suitable as a specific molecular marker of type A spermatogonia. Mol Reprod Dev 2013; 80:871-80. [PMID: 23913406 DOI: 10.1002/mrd.22224] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 07/30/2013] [Indexed: 11/10/2022]
Abstract
We developed a spermatogonial transplantation technique to produce donor-derived gametes in surrogate fish. Our ultimate aim is to establish surrogate broodstock that can produce bluefin tuna. We previously determined that only type A spermatogonia (ASG) could colonize recipient gonads in salmonids. Therefore, it is necessary to develop a precise molecular marker that can distinguish ASG in order to develop efficient spermatogonial transplantation methods. In this study, the Pacific bluefin tuna (Thunnus orientalis) dead end (BFTdnd) gene was identified as a specific marker for ASG. In situ hybridization and RT-PCR analysis with various types of spermatogenic cell populations captured by laser microdissection revealed that localization of BFTdnd mRNA was restricted to ASG, and not detected in other differentiated spermatogenic cells. In order to determine if BFTdnd can be used as a molecular marker to identify germ cells with high transplantability, transplantation of dissociated testicular cells isolated from juvenile, immature, and mature Pacific bluefin tuna, which have different proportions of dnd-positive ASG, were performed using chub mackerel as the surrogate recipient species. Colonization of transplanted donor germ cells was only successful with testicular cells from immature Pacific Bluefin tuna, which contained higher proportions of dnd-positive ASG than juvenile and mature fish. Thus, BFTdnd is a useful tool for identifying highly transplantable ASG for spermatogonial transplantation.
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Affiliation(s)
- Ryosuke Yazawa
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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Yoshizaki G, Okutsu T, Morita T, Terasawa M, Yazawa R, Takeuchi Y. Biological Characteristics of Fish Germ Cells and their Application to Developmental Biotechnology. Reprod Domest Anim 2012; 47 Suppl 4:187-92. [DOI: 10.1111/j.1439-0531.2012.02074.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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