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Kanamori A, Kitani R, Oota A, Hirano K, Myosho T, Kobayashi T, Kawamura K, Kato N, Ansai S, Kinoshita M. Wnt4a Is Indispensable for Genital Duct Elongation but Not for Gonadal Sex Differentiation in the Medaka, Oryzias latipes. Zoolog Sci 2023; 40:348-359. [PMID: 37818883 DOI: 10.2108/zs230050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/24/2023] [Indexed: 10/13/2023]
Abstract
In most vertebrates, the oviducts and sperm ducts are derived from the Müllerian ducts and Wolffian ducts, respectively. However, in teleosts, the genital ducts are formed by the posterior extension of gonads in both sexes. Whether the genital ducts of teleosts are newly evolved organs or variants of Müllerian ducts is an important question for understanding evolutionary mechanisms of morphogenesis. One of the genes essential for Müllerian duct formation in mice is Wnt4, which is expressed in the mesenchyme and induces invagination of the coelomic epithelium and its posterior elongation. Here, we addressed the above question by examining genital duct development in mutants of two Wnt4 genes in the medaka (wnt4a is orthologous to mouse Wnt4, and wnt4b is paralogous). The wnt4b mutants had a short body but were fertile with normal genital ducts. In contrast, both male and female wnt4a mutants had their posterior elongation of the gonads stopped within or just outside the coelom. The mutants retained the posterior parts of ovarian cavities or sperm duct primordia, which are potential target tissues of Wnt4a. The gonads of female scl mutants (unable to synthesize sex steroids) lacked these tissues and did not develop genital ducts. Medaka wnt4a was expressed in the mesenchyme ventral to the genital ducts in both sexes. Taken together, the data strongly suggest that the mouse Müllerian ducts and the medaka genital ducts share homologous developmental processes. Additionally, the wnt4a or wnt4b single mutants and the double mutants did not show sex-reversal, implying that both genes are dispensable for gonadal sex differentiation in the medaka.
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Affiliation(s)
- Akira Kanamori
- Division of Biological Science, Graduate School of Science, Nagoya University, Aichi 464-8602, Japan,
| | - Ryota Kitani
- Division of Biological Science, Graduate School of Science, Nagoya University, Aichi 464-8602, Japan
| | - Atsuko Oota
- Division of Biological Science, Graduate School of Science, Nagoya University, Aichi 464-8602, Japan
| | - Koudai Hirano
- Division of Biological Science, Graduate School of Science, Nagoya University, Aichi 464-8602, Japan
| | - Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Kouichi Kawamura
- Department of Marine Bioresources, Graduate School of Bioresources, Mie University, Mie 514-8507, Japan
| | - Naoyuki Kato
- Department of Environmental Science, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Satoshi Ansai
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
- Laboratory of Bioresources, National Institute for Basic Biology, Aichi 445-8585, Japan
- Graduate School of Life Sciences, Tohoku University, Miyagi 980-8577, Japan
| | - Masato Kinoshita
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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Watanabe A, Myosho T, Ishibashi A, Yamamoto J, Toda M, Onishi Y, Kobayashi T. Levonorgestrel causes feminization and dose-dependent masculinization in medaka fish (Oryzias latipes): Endocrine-disruption activity and its correlation with sex reversal. Sci Total Environ 2023; 876:162740. [PMID: 36921849 DOI: 10.1016/j.scitotenv.2023.162740] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/02/2023] [Accepted: 03/05/2023] [Indexed: 06/18/2023]
Abstract
The effect of a synthetic progestin, levonorgestrel (LNG), on the sex of exposed embryos was examined in medaka fish (Oryzias latipes). The aims of this study are to clarify the dual effect of LNG on sex and the correlation with its androgenic/estrogenic potential in medaka. LNG exposure causes significant dose-dependent masculinization (0.1-100 μg/L), whereas a decrease in the masculinization ratio is observed at 100 μg/L. LNG also causes significant feminization at 1-100 μg/L, but not in a dose-dependent manner. Exposure of estrogen-responsive gene (choriogeninH-EGFP) transgenic embryos to 100 μg/L LNG produced significant fluorescent signals in hatched fry. In vitro transcriptional assays indicated that LNG at 10-7-10-5 M induced significant activity for estrogen receptor (ESR)2a and ESR2b, but not for ESR1. In pre-self-feeding fry at 5 days post hatching (dph), 1-100 μg/L LNG caused a significant increase in the mRNA of choriogeninH, irrespective of genetic sex. Moreover, LNG (10-10-10-5 M) also caused a significant increase in the transcriptional activity of androgen receptor (AR) α and ARβ in vitro, and 0.1 μg/L LNG significantly increased the mRNA levels of a testis-differentiation initiation factor, gonadal soma-derived factor (gsdf), as an androgen-upregulated and estrogen-downregulated gene, in 5 dph XX fry to levels similar to those in the control XY fry. However, 100 and 10 μg/L LNG suppressed or did not induce gsdf mRNA expression in XY and XX fry, respectively. Together, these findings show that LNG exerts estrogenic and androgenic activities in different concentration ranges, which correlate with the ratio of LNG-induced sex reversal. These results suggest for the first time, that medaka exposure to LNG can induce masculinization and feminization, based on the balance between androgenic and estrogenic activities, and the protocol applied in this study represents an alternative to the traditional animal model used to screen for endocrine-disrupting potential.
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Affiliation(s)
- Akiho Watanabe
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Taijun Myosho
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Ayaka Ishibashi
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Jun Yamamoto
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Misa Toda
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Yuta Onishi
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Tohru Kobayashi
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan.
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Fujimoto S, Yaguchi H, Myosho T, Aoyama H, Sato Y, Kimura R. Population admixtures in medaka inferred by multiple arbitrary amplicon sequencing. Sci Rep 2022; 12:19989. [PMID: 36411327 PMCID: PMC9678866 DOI: 10.1038/s41598-022-24498-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 11/16/2022] [Indexed: 11/23/2022] Open
Abstract
Cost-effective genotyping can be achieved by sequencing PCR amplicons. Short 3-10 base primers can arbitrarily amplify thousands of loci using only a few primers. To improve the sequencing efficiency of the multiple arbitrary amplicon sequencing (MAAS) approach, we designed new primers and examined their efficiency in sequencing and genotyping. To demonstrate the effectiveness of our method, we applied it to examining the population structure of the small freshwater fish, medaka (Oryzias latipes). We obtained 2987 informative SNVs with no missing genotype calls for 67 individuals from 15 wild populations and three artificial strains. The estimated phylogenic and population genetic structures of the wild populations were consistent with previous studies, corroborating the accuracy of our genotyping method. We also attempted to reconstruct the genetic backgrounds of a commercial orange mutant strain, Himedaka, which has caused a genetic disturbance in wild populations. Our admixture analysis focusing on Himedaka showed that at least two wild populations had genetically been contributed to the nuclear genome of this mutant strain. Our genotyping methods and results will be useful in quantitative assessments of genetic disturbance by this commercially available strain.
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Affiliation(s)
- Shingo Fujimoto
- grid.267625.20000 0001 0685 5104Graduate School of Medicine, University of the Ryukyus, Nishihara, Okinawa 903-0125 Japan ,grid.267625.20000 0001 0685 5104Present Address: Research Laboratory Center, Faculty of Medicine, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan ,grid.267625.20000 0001 0685 5104Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan
| | - Hajime Yaguchi
- grid.267625.20000 0001 0685 5104Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan ,grid.258777.80000 0001 2295 9421Present Address: Department of Bioscience, School of Science and Technology, Kwansei Gakuin University, Nishihara, Hyogo 669-1330 Japan
| | - Taijun Myosho
- grid.469280.10000 0000 9209 9298Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Nishihara, 422-8526 Japan
| | - Hiroaki Aoyama
- grid.267625.20000 0001 0685 5104Center for Strategic and Research Center, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan ,grid.267625.20000 0001 0685 5104Research Planning Office, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan
| | - Yukuto Sato
- grid.267625.20000 0001 0685 5104Present Address: Research Laboratory Center, Faculty of Medicine, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan ,grid.267625.20000 0001 0685 5104Center for Strategic and Research Center, University of the Ryukyus, Nishihara, Okinawa 903-0213 Japan
| | - Ryosuke Kimura
- grid.267625.20000 0001 0685 5104Graduate School of Medicine, University of the Ryukyus, Nishihara, Okinawa 903-0125 Japan
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Myosho T, Ishibashi A, Fujimoto S, Miyagawa S, Iguchi T, Kobayashi T. Preself-Feeding Medaka Fry Provides a Suitable Screening System for in Vivo Assessment of Thyroid Hormone-Disrupting Potential. Environ Sci Technol 2022; 56:6479-6490. [PMID: 35475622 DOI: 10.1021/acs.est.1c06729] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Endocrine-disrupting chemicals are assessed based on their physiological potential and their potential associated adverse effects. However, suitable end points for detection of chemicals that interfere with the thyroid hormone (TH) system have not been established in nonmammals, with the exception of amphibian metamorphosis. The aims of the current study were to develop an in vivo screening system using preself-feeding medaka fry (Oryzias latipes) for the detection of TH-disrupting chemicals and elucidate the underlying molecular mechanism. 17α-Ethinylestradiol (EE2: <100 ng/L) did not induce mRNA expression of estrogen-responsive genes, vitellogenins (vtgs) mRNA. Meanwhile, coexposure with thyroxin (T4) induced an increase of vtg expression. TH-disrupting chemicals (thiourea (TU), perfluorooctanoic acid (PFOA), and tetrabromobisphenol A (TBBPA)) significantly suppressed EE2 (1,000 ng/L)-induced vtg1 expression, while T4 rescued their expression as well as that of thyroid hormone receptor α (tRα) and estrogen receptors (esrs). These results were supported by in silico analysis of the 5'-transcriptional regulatory region of these genes. Furthermore, the esr1 null mutant revealed that EE2-induced vtg1 expression requires mainly esr2a and esr2b in a TH-dependent manner in preself-feeding fry. Application of preself-feeding medaka fry as a screening system might help decipher the in vivo mechanisms of action of TH-disrupting molecules, while providing an alternative to the traditional animal model.
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Affiliation(s)
- Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Ayaka Ishibashi
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Shingo Fujimoto
- Tropical Biosphere Research Center, University of the Ryukyus, Okinawa 903-0213, Japan
| | - Shinichi Miyagawa
- Faculty of Advanced Engineering, Tokyo University of Science, Tokyo 125-8585, Japan
| | - Taisen Iguchi
- Graduate School of Nanobioscience, Yokohama City University, Yokohama 236-0027, Japan
| | - Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
- Graduate School of Integrated Pharmaceutical and Nutrition Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
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Myosho T, Hattori M, Yamamoto J, Toda M, Okamura T, Onishi Y, Takehana Y, Kobayashi T. Effects of synthetic sex steroid hormone exposures on gonadal sex differentiation and dynamics of a male-related gene, Gonadal soma-derived factor (Gsdf) and an estrogen up-regulated gene, Choriogenine-H (ChgH) gene expression in the euryhaline Javafish medaka, Oryzias javanicus, based on genetic sexes. Chemosphere 2021; 274:129893. [PMID: 33979926 DOI: 10.1016/j.chemosphere.2021.129893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/03/2021] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
To clarify the basal aspects of sexual development in Javafish medaka, Oryzias javanicus (ZZ/ZW), a model marine species for ecotoxicity testing, we examined the details of gonadal sex differentiation and exogenous sex hormone-dependent sex reversals using genetic sex-linked DNA markers. Sex differences in germ cell numbers were observed at 5 days post hatching (dph), in which there was a significant increase in the germ cells of ZW. In ZW, diplotene oocytes and the ovarian cavity appeared at approximately 10, and 30 dph, respectively. In ZZ, spermatogonial proliferation was observed at approximately 20 dph. A ZZ-dominant expression of Gonadal soma-derived factor (Gsdf) mRNA was detected before hatching. The exposure of embryos to 17α-ethinylestradiol (EE2; 0.1, 1, 10 ng/mL) did not cause sex reversals in most cases. However, EE2 exposures led to significant Choriogenin-H (ChgH) mRNA expression, an estrogen up-regulated gene, in all fry; these exposures did not suppress Gsdf expression in ZZ fry. The exposure of embryos to 17α-methyltestosterone (MT; 0.1, 1, 10 ng/mL) caused sex reversals but only at low frequencies in ZW and ZZ fish. Although the 10 ng/mL MT exposure was accompanied by induction of significant Gsdf expression in ZW fry, induction of ChgH expression was also observed in several fry. Together, the present study indicates for the first time that male-dominant sexual dimorphic expression of Gsdf precedes the first morphological sex difference, i.e., the sex difference in germ cell number, and results strongly suggest that exogenous sex hormone-dependent sex reversal is not induced easily in O. javanicus.
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Affiliation(s)
- Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan; Department of Environmental Life Sciences, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Minako Hattori
- Department of Environmental Life Sciences, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan
| | - Jun Yamamoto
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka, 421-0212, Japan
| | - Misa Toda
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka, 421-0212, Japan
| | - Tetsuro Okamura
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka, 421-0212, Japan
| | - Yuta Onishi
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka, 421-0212, Japan
| | - Yusuke Takehana
- Department of Animal Bio-Science, Faculty of Bio-Science, Nagahama Institute of Bioscience and Technology, 1266 Tamura, Nagahama, 526-0829, Japan
| | - Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan; Department of Environmental Life Sciences, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, 422-8526, Japan.
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Myosho T, Sato T, Nishiyama H, Watanabe A, Yamamoto J, Okamura T, Onishi Y, Fujimaki R, Hamaguchi S, Sakaizumi M, Kobayashi T. Inter- and Intraspecific Variation in Sex Hormone-Induced Sex-Reversal in Medaka, Oryzias latipes and Oryzias sakaizumii. Zoolog Sci 2019; 36:425-431. [DOI: 10.2108/zs180194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 03/12/2019] [Indexed: 11/17/2022]
Affiliation(s)
- Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Science, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan
| | - Tadashi Sato
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan
| | - Hiroka Nishiyama
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Science, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan
| | - Akiho Watanabe
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Science, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan
| | - Jun Yamamoto
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Tetsuro Okamura
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Yuta Onishi
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Rei Fujimaki
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan
| | - Satoshi Hamaguchi
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan
| | - Mitsuru Sakaizumi
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan
| | - Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Science, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan
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Myosho T, Takahashi H, Yoshida K, Sato T, Hamaguchi S, Sakamoto T, Sakaizumi M. Hyperosmotic tolerance of adult fish and early embryos are determined by discrete, single loci in the genus Oryzias. Sci Rep 2018; 8:6897. [PMID: 29720646 PMCID: PMC5932013 DOI: 10.1038/s41598-018-24621-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 03/29/2018] [Indexed: 11/09/2022] Open
Abstract
The acquisition of environmental osmolality tolerance traits in individuals and gametes is an important event in the evolution and diversification of organisms. Although teleost fish exhibit considerable intra- and interspecific variation in salinity tolerance, the genetic mechanisms underlying this trait remain unclear. Oryzias celebensis survives in sea and fresh water during both the embryonic and adult stages, whereas its close relative Oryzias woworae cannot survive in sea water at either stage. A linkage analysis using backcross progeny identified a single locus responsible for adult hyperosmotic tolerance on a fused chromosome that corresponds to O. latipes linkage groups (LGs) 6 and 23. Conversely, O. woworae eggs fertilised with O. celebensis sperm died in sea water at the cleavage stages, whereas O. celebensis eggs fertilised with O. woworae sperm developed normally, demonstrating that maternal factor(s) from O. celebensis are responsible for hyperosmotic tolerance during early development. A further linkage analysis using backcrossed females revealed a discrete single locus relating to the maternal hyperosmotic tolerance factor in a fused chromosomal region homologous to O. latipes LGs 17 and 19. These results indicate that a maternal factor governs embryonic hyperosmotic tolerance and maps to a locus distinct from that associated with adult hyperosmotic tolerance.
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Affiliation(s)
- Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Science, University of Shizuoka, Shizuoka, 422-8526, Japan. .,Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan.
| | - Hideya Takahashi
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan.,Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Okayama, 701-4303, Japan
| | - Kento Yoshida
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan
| | - Tadashi Sato
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan
| | - Satoshi Hamaguchi
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan
| | - Tatsuya Sakamoto
- Ushimado Marine Institute, Faculty of Science, Okayama University, Setouchi, Okayama, 701-4303, Japan
| | - Mitsuru Sakaizumi
- Department of Environmental Science, Institute of Science and Technology, Niigata University, Ikarashi, Niigata, 950-2181, Japan
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Kobayashi T, Chiba A, Sato T, Myosho T, Yamamoto J, Okamura T, Onishi Y, Sakaizumi M, Hamaguchi S, Iguchi T, Horie Y. Estrogen alters gonadal soma-derived factor (Gsdf)/Foxl2 expression levels in the testes associated with testis-ova differentiation in adult medaka, Oryzias latipes. Aquat Toxicol 2017; 191:209-218. [PMID: 28866280 DOI: 10.1016/j.aquatox.2017.08.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/11/2017] [Accepted: 08/16/2017] [Indexed: 06/07/2023]
Abstract
Testis-ova differentiation in sexually mature male medaka (Oryzias latipes) is easily induced by estrogenic chemicals, indicating that spermatogonia persist in sexual bipotentiality, even in mature testes in medaka. By contrast, the effects of estrogen on testicular somatic cells associated with testis-ova differentiation in medaka remain unclear. In this study, we focused on the dynamics of sex-related genes (Gsdf, Dmrt1, and Foxl2) expressed in Sertoli cells in the mature testes of adult medaka during estrogen-induced testis-ova differentiation. When mature male medaka were exposed to estradiol benzoate (EB; 800ng/L), testis-ova first appeared after EB treatment for 14days (observed as the first oocytes of the leptotene-zygotene stage). However, the testis remained structurally unchanged, even after EB treatment for 28days. Although Foxl2 is a female-specific sex gene, EB treatment for 7days induced Foxl2/FOXL2 expression in all Sertoli cell-enclosed spermatogonia before testis-ova first appeared; however, Foxl2 was not detected in somatic cells in control testes. Conversely, Sertoli-cell-specific Gsdf mRNA expression levels significantly decreased after EB treatment for 14days, and no changes were observed in DMRT1 localization following EB treatment, whereas Dmrt1 mRNA levels increased significantly. Furthermore, after EB exposure, FOXl2 and DMRT1 were co-localized in Sertoli cells during testis-ova differentiation, although FOXL2 localization was undetectable in Sertoli-cell-enclosed apoptotic testis-ova, whereas DMRT1 remained localized in Sertoli cells. These results indicated for the first time that based on the expression of female-specific sex genes, feminization of Sertoli cells precedes testis-ova differentiation induced by estrogen in mature testes in medaka; however, complete feminization of Sertoli cells was not induced in this study. Additionally, it is suggested strongly that Foxl2 and Gsdf expression constitute potential molecular markers for evaluating the effects of estrogenic chemicals on testicular somatic cells associated with estrogen-induced testis-ova differentiation in mature male medaka.
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Affiliation(s)
- Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan.
| | - Ayaka Chiba
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan.
| | - Tadashi Sato
- Institute for Science and Technology, Niigata University, Niigata, Niigata 950-2181, Japan.
| | - Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan.
| | - Jun Yamamoto
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan.
| | - Tetsuro Okamura
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan.
| | - Yuta Onishi
- Institute of Environmental Ecology, IDEA Consultants Inc., 1334-5, Riemon, Yaizu, Shizuoka 421-0212, Japan.
| | - Mitsuru Sakaizumi
- Institute for Science and Technology, Niigata University, Niigata, Niigata 950-2181, Japan.
| | - Satoshi Hamaguchi
- Institute for Science and Technology, Niigata University, Niigata, Niigata 950-2181, Japan.
| | - Taisen Iguchi
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institute of Natural Sciences, Okazaki, Aichi 444-8787, Japan.
| | - Yoshifumi Horie
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Shizuoka 422-8526, Japan; National Institute for Environmental Studies, Tsukuba, 305-8506, Japan.
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Tohyama S, Ogino Y, Lange A, Myosho T, Kobayashi T, Hirano Y, Yamada G, Sato T, Tatarazako N, Tyler CR, Iguchi T, Miyagawa S. Establishment of estrogen receptor 1 (ESR1)-knockout medaka: ESR1 is dispensable for sexual development and reproduction in medaka, Oryzias latipes. Dev Growth Differ 2017; 59:552-561. [DOI: 10.1111/dgd.12386] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 06/14/2017] [Accepted: 06/14/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Saki Tohyama
- Graduate School of Nutritional and Environmental Sciences; University of Shizuoka; Shizuoka 422-8526 Japan
- Graduate School of Nanobioscience; Yokohama City University; Yokohama Kanagawa 236-0027 Japan
| | - Yukiko Ogino
- Faculty of Agriculture; Kyushu University; Fukuoka 812-8581 Japan
| | - Anke Lange
- Biosciences; College of Life and Environmental Sciences; University of Exeter; Exeter EX4 4QD UK
| | - Taijun Myosho
- Graduate School of Nutritional and Environmental Sciences; University of Shizuoka; Shizuoka 422-8526 Japan
| | - Tohru Kobayashi
- Graduate School of Nutritional and Environmental Sciences; University of Shizuoka; Shizuoka 422-8526 Japan
| | - Yu Hirano
- Institute of Advanced Medicine; Wakayama Medical University; Wakayama 641-8509 Japan
| | - Gen Yamada
- Institute of Advanced Medicine; Wakayama Medical University; Wakayama 641-8509 Japan
| | - Tomomi Sato
- Graduate School of Nanobioscience; Yokohama City University; Yokohama Kanagawa 236-0027 Japan
| | - Norihisa Tatarazako
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; Tsukuba Ibaraki 305-8506 Japan
| | - Charles R. Tyler
- Biosciences; College of Life and Environmental Sciences; University of Exeter; Exeter EX4 4QD UK
| | - Taisen Iguchi
- Graduate School of Nanobioscience; Yokohama City University; Yokohama Kanagawa 236-0027 Japan
| | - Shinichi Miyagawa
- Institute of Advanced Medicine; Wakayama Medical University; Wakayama 641-8509 Japan
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Horie Y, Myosho T, Sato T, Sakaizumi M, Hamaguchi S, Kobayashi T. Androgen induces gonadal soma-derived factor, Gsdf, in XX gonads correlated to sex-reversal but not Dmrt1 directly, in the teleost fish, northern medaka (Oryzias sakaizumii). Mol Cell Endocrinol 2016; 436:141-9. [PMID: 27452797 DOI: 10.1016/j.mce.2016.07.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/14/2016] [Accepted: 07/20/2016] [Indexed: 11/21/2022]
Abstract
In the inbred HNI-II strain of Oryzias sakaizumii, Dmy and Gsdf are expressed in XY gonads from Stages 35 and 36, respectively, similarly to the inbred Hd-rR strain of Oryzias latipes. However, Dmrt1 respectively becomes detectable at Stage 36 and 5 days post hatching (dph) in the two strains. In XX HNI-II embryos, 17α-methyltestosterone (MT) induces Gsdf mRNA from Stage 36, accompanied by complete sex-reversal in all treated individuals (MT, 10 ng/mL), while Dmrt1 mRNA was first detectable at 5 dph. In XX d-rR, MT induced Gsdf mRNA expression and sex-reversal in only some of the treated individuals. Together, these results suggest the testis differentiation cascade in XY individuals differs between the HNI-II and Hd-rR strains. In addition, it is suggested that androgen-induced XX sex-reversal proceeds via an androgen-Gsdf-Dmrt1 cascade and that Gsdf plays an important role in sex-reversal in medaka.
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Affiliation(s)
- Yoshifumi Horie
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan.
| | - Taijun Myosho
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan.
| | - Tadashi Sato
- Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan.
| | - Mitsuru Sakaizumi
- Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan.
| | - Satoshi Hamaguchi
- Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan.
| | - Tohru Kobayashi
- Laboratory of Molecular Reproductive Biology, Institute for Environmental Sciences, University of Shizuoka, Shizuoka 422-8526, Japan.
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Takehana Y, Matsuda M, Myosho T, Suster ML, Kawakami K, Shin-I T, Kohara Y, Kuroki Y, Toyoda A, Fujiyama A, Hamaguchi S, Sakaizumi M, Naruse K. Co-option of Sox3 as the male-determining factor on the Y chromosome in the fish Oryzias dancena. Nat Commun 2014; 5:4157. [PMID: 24948391 DOI: 10.1038/ncomms5157] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 05/19/2014] [Indexed: 12/21/2022] Open
Abstract
Sex chromosomes harbour a primary sex-determining signal that triggers sexual development of the organism. However, diverse sex chromosome systems have been evolved in vertebrates. Here we use positional cloning to identify the sex-determining locus of a medaka-related fish, Oryzias dancena, and find that the locus on the Y chromosome contains a cis-regulatory element that upregulates neighbouring Sox3 expression in developing gonad. Sex-reversed phenotypes in Sox3(Y) transgenic fish, and Sox3(Y) loss-of-function mutants all point to its critical role in sex determination. Furthermore, we demonstrate that Sox3 initiates testicular differentiation by upregulating expression of downstream Gsdf, which is highly conserved in fish sex differentiation pathways. Our results not only provide strong evidence for the independent recruitment of Sox3 to male determination in distantly related vertebrates, but also provide direct evidence that a novel sex determination pathway has evolved through co-option of a transcriptional regulator potentially interacted with a conserved downstream component.
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Affiliation(s)
- Yusuke Takehana
- 1] Laboratory of Bioresources, National Institute for Basic Biology, Okazaki 444-8585, Japan [2] Department of Basic Biology, the Graduate University for Advanced Studies (SOKENDAI), Okazaki 444-8585, Japan
| | - Masaru Matsuda
- Center for Bioscience Research and Education, Utsunomiya University, Utsunomiya, Tochigi 321-8505, Japan
| | - Taijun Myosho
- Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Maximiliano L Suster
- 1] Neural Circuits and Behaviour Group, Uni Research AS, Bergen 5008, Norway [2] Division of Molecular and Developmental Biology, National Institute of Genetics, Mishima 411-8540, Japan
| | - Koichi Kawakami
- 1] Division of Molecular and Developmental Biology, National Institute of Genetics, Mishima 411-8540, Japan [2] Department of Genetics, the Graduate University for Advanced Studies (SOKENDAI), Mishima 411-8540, Japan
| | - Tadasu Shin-I
- Center for Genetic Resource Information, National Institute of Genetics, Mishima 411-8540, Japan
| | - Yuji Kohara
- Center for Genetic Resource Information, National Institute of Genetics, Mishima 411-8540, Japan
| | - Yoko Kuroki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Sendai 980-8573, Japan
| | - Atsushi Toyoda
- 1] Department of Genetics, the Graduate University for Advanced Studies (SOKENDAI), Mishima 411-8540, Japan [2] Comparative Genomics Laboratory, National Institute of Genetics, Mishima 411-8540, Japan
| | - Asao Fujiyama
- 1] Department of Genetics, the Graduate University for Advanced Studies (SOKENDAI), Mishima 411-8540, Japan [2] Comparative Genomics Laboratory, National Institute of Genetics, Mishima 411-8540, Japan [3] National Institute of Informatics, Tokyo 101-8430, Japan
| | - Satoshi Hamaguchi
- Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Mitsuru Sakaizumi
- Institute of Science and Technology, Niigata University, Niigata 950-2181, Japan
| | - Kiyoshi Naruse
- 1] Laboratory of Bioresources, National Institute for Basic Biology, Okazaki 444-8585, Japan [2] Department of Basic Biology, the Graduate University for Advanced Studies (SOKENDAI), Okazaki 444-8585, Japan
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