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Liu Q, Hu J, Lin Y, Wu X, Feng Y, Ye J, Zhang K, Zheng S. Effects of exogenous steroid hormones on growth, body color, and gonadal development in the Opsariichthys bidens. FISH PHYSIOLOGY AND BIOCHEMISTRY 2024; 50:449-461. [PMID: 38079050 DOI: 10.1007/s10695-023-01275-5] [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: 09/15/2023] [Accepted: 11/24/2023] [Indexed: 04/17/2024]
Abstract
To investigate the effects of exogenous steroid hormones on growth, body color, and gonadal development in the Opsariichthys bidens (O. bidens), synthetic methyltestosterone (MT) and 17β-estradiol (E2) were used for 28 days' treatment of 4-month-old O. bidens before the breeding season. Our results suggested that MT had a significant growth-promoting effect (P < 0.05), whereas E2 played an inhibitory role. On the body surface, the females in the MT group showed gray stripes, and the fish in other groups showed no obvious stripes. The males with MT treatment displayed brighter blue-green stripes compared to the CK and E2 groups. The histological analysis showed that the MT significantly promoted testes development in males, blocked oocyte development, and caused massive apoptosis in females, whereas the E2 group promoted ovarian development and inhibited testes development. Based on qRT-PCR analysis, in females, the expression of igf-1, dmrt1, and cyp19a1a genes revealed that E2 treatment resulted in down-regulation of igf-1 expression and up-regulation of cyp19a1a expression. In males, igf-1 and dmrt1 were significantly up-regulated after MT treatment, and E2 treatment led to down-regulation of igf-1. Therefore, this study demonstrates that MT and E2 play an important role in reversing the morphological sex characteristics of females and males.
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Affiliation(s)
- Qingyuan Liu
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China
| | - Jinchun Hu
- Quzhou Aquatic Technology Promotion Station, Quzhou, China
| | - Yurui Lin
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China
| | - Xinrui Wu
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China
| | - Yujun Feng
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China
| | - Jiazheng Ye
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China
| | - Kai Zhang
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China
| | - Shanjian Zheng
- College of Life Sciences, Zhejiang Normal University, Room 203, 10 teaching buildings, 688 Yingbin Avenue, Jinhua, 321004, China.
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Yostawonkul J, Kitiyodom S, Supchukun K, Thumrongsiri N, Saengkrit N, Pinpimai K, Hajitou A, Thompson KD, Rattanapinyopituk K, Maita M, Kamble MT, Yata T, Pirarat N. Masculinization of Red Tilapia ( Oreochromis spp.) Using 17α-Methyltestosterone-Loaded Alkyl Polyglucosides Integrated into Nanostructured Lipid Carriers. Animals (Basel) 2023; 13:ani13081364. [PMID: 37106927 PMCID: PMC10135129 DOI: 10.3390/ani13081364] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/31/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023] Open
Abstract
The aim of the present study was to optimize a masculinization platform for the production of all-male red tilapia fry by oral administration of 30 and 60 ppm of MT and alkyl polyglucoside nanostructured lipid carriers (APG-NLC) loaded with MT, respectively, for 14 and 21 days. The characterization, encapsulation efficiency and release kinetics of MT in lipid-based nanoparticles were assessed in vitro. The results showed that the MT-loaded nanoparticles were spherical, ranging from 80 to 125 nm in size, and had a negative charge with a narrow particle distribution. The APG-NLC loaded with MT provided higher physical stability and encapsulation efficacy than the NLC. The release rate constants of MT from MT-NLC and MT-APG-NLC were higher than those of free MT, which is insoluble in aqueous media. There was no significant difference in survival between the fish administered MT or the those fed orally with MT-APG-NLC fish. According to the logistic regression analysis, the sex reversal efficacy of MT-APG-NLC (30 ppm) and MT (60 ppm), resulted in significantly higher numbers of males after 21 days of treatment compared with the controls. The production cost of MT-APG-NLC (30 ppm) after 21 days of treatment was reduced by 32.9% compared with the conventional MT treatment group (60 ppm). In all the treatments, the length-weight relationship (LWR) showed negatively allomeric growth behavior (b < 3), with a relative condition factor (Kn) of more than 1. Therefore, MT-APG-NLC (30 ppm) would seem to be a promising, cost-effective way to reduce the dose of MT used for the masculinization of farmed red tilapia.
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Affiliation(s)
- Jakarwan Yostawonkul
- The International Graduate Course of Veterinary Science and Technology (VST), Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani 12120, Thailand
| | - Sirikorn Kitiyodom
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kittipat Supchukun
- The International Graduate Course of Veterinary Science and Technology (VST), Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nutthanit Thumrongsiri
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani 12120, Thailand
| | - Nattika Saengkrit
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani 12120, Thailand
| | - Komkiew Pinpimai
- Aquatic Resources Research Institute, Chulalongkorn University, Bangkok 10330, Thailand
| | - Amin Hajitou
- Cancer Phagotherapy, Department of Brain Sciences, Imperial College London, London W12 0NN, UK
| | | | - Kasem Rattanapinyopituk
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Masashi Maita
- Laboratory of Fish Health Management, Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato, Tokyo 108-8477, Japan
| | - Manoj Tukaram Kamble
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Teerapong Yata
- Unit of Biochemistry, Department of Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nopadon Pirarat
- Wildlife, Exotic and Aquatic Animal Pathology Research Unit, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
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Karaket T, Reungkhajorn A, Ponza P. The optimum dose and period of 17α-methyltestosterone immersion on masculinization of red tilapia (Oreochromis spp.). AQUACULTURE AND FISHERIES 2023. [DOI: 10.1016/j.aaf.2021.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Henry-Silva GG, da Silva Cacho JC, Moura RST, Flickinger DL, Valenti WC. Economic, social, and environmental assessment of farming Nile tilapia in net-cages in a reservoir in hot semi-arid region during an extended drought event. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:78768-78779. [PMID: 35697987 DOI: 10.1007/s11356-022-20998-1] [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: 12/30/2021] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Water reservoirs have been constructed in hot semi-arid regions, which may be used to produce fish. The present study described major features of the economic, social, and environmental characteristics of a net-cage Nile tilapia production system, stocked with 100 and 120 fish/m3, implemented in a reservoir in the hot semi-arid region of Brazil during an extended drought event. The production cycle was reduced from 6-8 to 4 months because of the lack of water in the reservoir. This resulted in the harvest of small fish weighting ~300-350 g that reached a low value in the market. As a consequence, indicators of financial feasibility showed low values, which were not attractive for entrepreneurs. Nevertheless, for both stocking densities, the monthly income was about US$ 1,500.00, which is 5-fold the minimum wage in the region. In general, the activity has a positive social impact, despite the low contribution to development of the local economy and food security because most supply came from outside and fish were sold to distant regions. Various age and ethnic groups were represented among the employees, but the enterprise was operated only by men. Phosphorus accumulations in the reservoir were 2.1 and 2.0 kg/t of fish produced and particulate material accumulations of 110 and 100 kg/t of fish production for 125 fish/m3 and 100 fish/m3, respectively. The study indicated that the Nile tilapia culture in hot semi-arid region is strongly affected by long drought events and adaptations in the planning and management should be done when implementing the systems. However, it seems that the activity has some resilience to still provide food, generate wealth, and promote social development for local population with low environmental impact.
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Affiliation(s)
- Gustavo Gonzaga Henry-Silva
- Centro de Ciências Biológicas e da Saúde, Universidade Federal Rural do Semi-Árido (UFERSA), Campus Mossoró, Mossoró, RN, 59625-900, Brazil.
| | - Júlio César da Silva Cacho
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte (IFRN), Campus Macau, Macau, RN, 59500-000, Brazil
| | - Rodrigo Sávio Teixeira Moura
- Centro de Ciências Humanas, Naturais, Saúde e Tecnologia, Universidade Federal do Maranhão (UFMA), Campus Pinheiro, Pinheiro, MA, 65200-000, Brazil
| | - Dallas Lee Flickinger
- Department of Agriculture and Environmental Sciences, Lincoln University, Jefferson City, MO, 65101, USA
| | - Wagner C Valenti
- São Paulo State University (UNESP), Aquaculture Center, Via Paulo Donato Castelane s/n, Jaboticabal, SP, 14 884-900, Brazil
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Miller DH, Villeneuve DL, Santana-Rodriguez KJ, Ankley GT. A Multidimensional Matrix Model for Predicting the Effects of Male-Biased Sex Ratios on Fish Populations. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:1066-1077. [PMID: 35020961 PMCID: PMC9586198 DOI: 10.1002/etc.5287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 12/13/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Laboratory experiments have established that exposure to certain endocrine-active substances prior to and/or during the period of sexual differentiation can lead to skewed sex ratios in fish. However, the potential long-term population impact of biased sex ratio depends on multiple factors including the life history of the species and whether the ratio is male or female-biased. In the present study, we describe a novel multidimensional, density-dependent matrix model that analyzes age class-structure of both males and females over time, allowing for the quantitative evaluation of the effects of biased sex ratio on population status. This approach can be used in conjunction with field monitoring efforts and/or laboratory testing to link effects on sex ratio due to chemical and/or nonchemical stressors to adverse outcomes in whole organisms and populations. For demonstration purposes, we applied the model to evaluate population trajectories for fathead minnow (Pimephales promelas) exposed to prochloraz, an aromatase inhibitor, during sexual differentiation. The model also was used to explore the population impact in a more realistic exposure scenario in which both adult and early life stages of fish are exposed concurrently to prochloraz, which, in addition to altering sex ratio during development, can decrease vitellogenin and egg production in adult females. For each exposure scenario, the model was used to analyze total population size, numbers of females and of males, and sex specific recruitment of the F1 generation. The present study illustrates the utility of multidimensional matrix population models for ecological risk assessment in terms of integrating effects across a population of an organism even when chemical effects on individuals are manifested via different pathways depending on life stage. Environ Toxicol Chem 2022;41:1066-1077. Published 2022. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- David H. Miller
- United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, Ann Arbor, Michigan
| | - Daniel L. Villeneuve
- United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota
| | - Kelvin J. Santana-Rodriguez
- Oak Ridge Institute for Science and Education Participant at the United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota
| | - Gerald T. Ankley
- United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, Duluth, Minnesota
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Varela ES, Bekaert M, Ganeco-Kirschnik LN, Torati LS, Shiotsuki L, de Almeida FL, Villela LCV, Rezende FP, da Silva Barroso A, de Freitas LEL, Taggart JB, Migaud H. A high-density linkage map and sex-linked markers for the Amazon Tambaqui Colossoma macropomum. BMC Genomics 2021; 22:709. [PMID: 34598670 PMCID: PMC8487117 DOI: 10.1186/s12864-021-08037-8] [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: 05/27/2021] [Accepted: 09/15/2021] [Indexed: 11/12/2022] Open
Abstract
Background Tambaqui (Colossoma macropomum, Cuvier, 1818) is the most economically important native freshwater fish species in Brazil. It can reach a total length of over 1 m and a weight of over 40 kg. The species displays a clear sex dimorphism in growth performance, with females reaching larger sizes at harvest. In aquaculture, the production of monosex populations in selective breeding programmes has been therefore identified as a key priority. Results In the present study, a genetic linkage map was generated by double digest restriction-site associated DNA (ddRAD) sequencing from 248 individuals sampled from two F1 families. The map was constructed using 14,805 informative SNPs and spanned 27 linkage groups. From this, the tambaqui draft genome was improved, by ordering the scaffolds into chromosomes, and sex-linked markers were identified. A total of 235 markers on linkage group 26 showed a significant association with the phenotypic sex, supporting an XX/XY sex determination system in the species. The four most informative sex-linked markers were validated on another 206 sexed individuals, demonstrating an accuracy in predicting sex ranging from 90.0 to 96.7%. Conclusions The genetic mapping and novel sex-linked DNA markers identified and validated offer new tools for rapid progeny sexing, thus supporting the development of monosex female production in the industry while also supporting breeding programmes of the species. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-08037-8.
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Affiliation(s)
- Eduardo Sousa Varela
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil.
| | - Michaël Bekaert
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK
| | - Luciana Nakaghi Ganeco-Kirschnik
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | - Lucas Simon Torati
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | - Luciana Shiotsuki
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | | | - Luciana Cristine Vasques Villela
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | - Fabrício Pereira Rezende
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | - Aurisan da Silva Barroso
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | - Luiz Eduardo Lima de Freitas
- Embrapa Pesca e Aquicultura, Prolongamento da Av. NS 10, Cruzamento com AV. LO 18, Sentido Norte, loteamento Água Fria, CEP, Palmas, TO, 77008-900, Brazil
| | - John Bernard Taggart
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK
| | - Herve Migaud
- Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK
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Sex Determination and Differentiation in Teleost: Roles of Genetics, Environment, and Brain. BIOLOGY 2021; 10:biology10100973. [PMID: 34681072 PMCID: PMC8533387 DOI: 10.3390/biology10100973] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 09/19/2021] [Accepted: 09/20/2021] [Indexed: 01/19/2023]
Abstract
The fish reproductive system is a complex biological system. Nonetheless, reproductive organ development is conserved, which starts with sex determination and then sex differentiation. The sex of a teleost is determined and differentiated from bipotential primordium by genetics, environmental factors, or both. These two processes are species-specific. There are several prominent genes and environmental factors involved during sex determination and differentiation. At the cellular level, most of the sex-determining genes suppress the female pathway. For environmental factors, there are temperature, density, hypoxia, pH, and social interaction. Once the sexual fate is determined, sex differentiation takes over the gonadal developmental process. Environmental factors involve activation and suppression of various male and female pathways depending on the sexual fate. Alongside these factors, the role of the brain during sex determination and differentiation remains elusive. Nonetheless, GnRH III knockout has promoted a male sex-biased population, which shows brain involvement during sex determination. During sex differentiation, LH and FSH might not affect the gonadal differentiation, but are required for regulating sex differentiation. This review discusses the role of prominent genes, environmental factors, and the brain in sex determination and differentiation across a few teleost species.
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Shi H, Ru X, Mustapha UF, Jiang D, Huang Y, Pan S, Zhu C, Li G. Characterization, expression, and regulatory effects of nr0b1a and nr0b1b in spotted scat (Scatophagus argus). Comp Biochem Physiol B Biochem Mol Biol 2021; 256:110644. [PMID: 34224854 DOI: 10.1016/j.cbpb.2021.110644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 12/20/2022]
Abstract
Nuclear receptor subfamily 0 group B member 1 (Nr0b1) belongs to the nuclear receptor (NR) superfamily. It plays critical roles in sex determination, sex differentiation, and gonadal development in mammals. In this study, the duplicated genes nr0b1a and nr0b1b were identified in spotted scat (Scatophagus argus). Phylogenetic and synteny analyses revealed that, unlike nr0b1a, nr0b1b was retained in several species of teleosts after an nr0b1 gene duplication event but was secondarily lost in other fish species, amphibians, reptiles, birds, and mammals. In a sequence analysis, only 1.5 LXXLL-related repeat motifs were identified in spotted scat Nr0b1a, Nr0b1b, and non-mammalian Nr0b1a/Nr0b1, different from the 3.5 repeat motifs in mammalian Nr0b1. By qPCR, nr0b1a and nr0b1b were highly expressed in testes from stages IV to V and in ovaries from stages II to IV, respectively. Male-to-female sex reversal was induced in XY spotted scat by the administration of exogenous E2. A qPCR analysis showed that nr0b1b mRNA expression was higher in sex-reversed XY fish than in control XY fish, with no difference in nr0b1a. A luciferase assay showed that spotted scat Nr0b1a and Nr0b1b did not individually activate cyp19a1a gene transcription. As in mammals, spotted scat Nr0b1a suppressed Nr5a1-mediated cyp19a1a expression, despite containing only 1.5 LXXLL-related repeat motifs in its N-terminal region, while Nr0b1b stimulated Nr5a1-mediated cyp19a1a transcription. These results demonstrated that nr0b1a and nr0b1b in spotted scat have distinct expression patterns and regulatory effects and further indicate that nr0b1b might be involved in ovarian development by regulating Nr5a1-mediated cyp19a1a expression.
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Affiliation(s)
- Hongjuan Shi
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Xiaoying Ru
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Umar Farouk Mustapha
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Dongneng Jiang
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yang Huang
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Shuhui Pan
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Chunhua Zhu
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China
| | - Guangli Li
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Key Laboratory of Marine Ecology and Aquaculture Environment of Zhanjiang, Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, Fisheries College, Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Ocean University, Zhanjiang 524088, China.
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Teng J, Zhao Y, Chen HJ, Xue LY, Ji XS. Global expression response of genes in sex-undifferentiated Nile tilapia gonads after exposure to trace letrozole. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 217:112255. [PMID: 33915448 DOI: 10.1016/j.ecoenv.2021.112255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 04/06/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
The aromatase inhibitor letrozole can be found in rivers, effluents, and even drinking water. Studies have demonstrated that letrozole affects various metabolic pathways and may cause reproductive toxicity, especially in fish exposed during development. However, studies on the effect of a low concentration of letrozole at the whole-gonad transcriptomic level in the early stage of fish sexual development have not been investigated. The aim of our study was to explore the potential effects of a low concentration of letrozole on the gonad transcriptome of Nile tilapia at an early stage of sexual development. In this study, 9 dpf (days postfertilization) Nile tilapia were exposed to trace letrozole for 12 days. Letrozole exposure from 9 dpf to 21 dpf persistently altered phenotypic sex development and induced the male-biased sex ratio. The transcriptome results showed that 1173 differentially expressed genes (DEGs) were present in the female control vs 1.5 μg/L letrozole-treated female comparison group and that 1576 DEGs were present in the 1.5 μg/L letrozole-treated female vs male control comparison group. Differentially expressed gene enrichment analysis revealed several crucial pathways, including the drug metabolism-cytochrome P450 pathway, the ErbB-PI3K/Akt/mTOR pathway, and the calcium signalling pathway. Further analysis of these identified DEGs indicated that some key genes correlated with metabolism and epigenetic regulation were significantly affected by letrozole, such as UDP-glucuronosyltransferase (Ugt), glutathione S-transferase omega-1 (Gsto1), lysine-specific demethylase 6bb (Kdm6bb, original name is Kdm6a), jumonji and AT-rich interaction domain containing 2 (Jarid2b, original name is Jarid2), growth arrest and DNA damage inducible gamma (Gadd45g), and chromobox protein 7 (Cbx7). The qRT-PCR validation results for twelve DEGs showed that the Pearson's correlation of the log10fold change values between the qPCR and RNA-Seq results was 0.90, indicating the accuracy and reliability of the RNA-Seq results. Our study is the first to report the effect of letrozole on the transcriptome of gonads from fish during early-stage sexual development. These findings will be useful for understanding the toxic effects and molecular mechanisms of letrozole exposure at the early stage of gonad development on the sexual development of aquatic organisms.
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Affiliation(s)
- Jian Teng
- College of Marine Sciences, Ningbo University, Ningbo, Zhejiang, China; College of Animal Science and Technology, Shandong Agricultural University, Taian, Shandong, China
| | - Yan Zhao
- College of Animal Science and Technology, Shandong Agricultural University, Taian, Shandong, China
| | - Hong Ju Chen
- College of Animal Science and Technology, Shandong Agricultural University, Taian, Shandong, China
| | - Liang Yi Xue
- College of Marine Sciences, Ningbo University, Ningbo, Zhejiang, China.
| | - Xiang Shan Ji
- College of Animal Science and Technology, Shandong Agricultural University, Taian, Shandong, China.
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Bhagat J, Singh N, Nishimura N, Shimada Y. A comprehensive review on environmental toxicity of azole compounds to fish. CHEMOSPHERE 2021; 262:128335. [PMID: 33182121 DOI: 10.1016/j.chemosphere.2020.128335] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/04/2020] [Accepted: 09/11/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Azoles are considered as one of the most efficient fungicides for the treatment of humans, animals, and plant fungal pathogens. They are of significant clinical importance as antifungal drugs and are widely used in personal care products, ultraviolet stabilizers, and in aircraft for its anti-corrosive properties. The prevalence of azole compounds in the natural environment and its accumulation in fish raises questions about its impact on aquatic organisms. OBJECTIVES The objective of this paper is to review the scientific studies on the effects of azole compounds in fish and to discuss future opportunities for the risk evaluation. METHODS A systematic literature search was conducted on Web of Science, PubMed, and ScienceDirect to locate peer-reviewed scientific articles on occurrence, environmental fate, and toxicological impact of azole fungicides on fish. RESULTS Studies included in this review provide ample evidence that azole compounds are not only commonly detected in the natural environment but also cause several detrimental effects on fish. Future studies with environmentally relevant concentrations of azole alone or in combination with other commonly occurring contaminants in a multigenerational study could provide a better understanding. CONCLUSION Based on current knowledge and studies reporting adverse biological effects of azole on fish, considerable attention is required for better management and effective ecological risk assessment of these emerging contaminants.
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Affiliation(s)
- Jacky Bhagat
- Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, 514-8507, Japan; Mie University Zebrafish Drug Screening Center, Tsu, Mie, 514-8507, Japan.
| | - Nisha Singh
- Environment Nanoscience Laboratory, Department of Earth Science, Indian Institute of Science Education and Research, Kolkata, 741246, India.
| | - Norihiro Nishimura
- Graduate School of Regional Innovation Studies, Mie University, Tsu, Mie, 514-8507, Japan; Mie University Zebrafish Drug Screening Center, Tsu, Mie, 514-8507, Japan.
| | - Yasuhito Shimada
- Mie University Zebrafish Drug Screening Center, Tsu, Mie, 514-8507, Japan; Department of Integrative Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie, 514-8507, Japan; Department of Bioinformatics, Mie University Advanced Science Research Promotion Center, Tsu, Mie, 514-8507, Japan.
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11
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Patil JG, Norazmi-Lokman NH, Kwan TN. Reproductive viability of paradoxically masculinised Gambusia holbrooki generated following diethylstilbestrol (DES) treatment. Comp Biochem Physiol B Biochem Mol Biol 2020; 248-249:110468. [PMID: 32710933 DOI: 10.1016/j.cbpb.2020.110468] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 06/01/2020] [Accepted: 06/29/2020] [Indexed: 01/22/2023]
Abstract
Hormonal sex reversal can produce monosex fish stocks and provide insights into their gamity and reproductive physiology. However, paradoxical effects have been reported in several fish species that remain largely ignored as anomalies, particularly those of masculinisation. As a first step, this study examined reproductive viability of paradoxically masculinised Gambusia holbrooki produced following oral administration (20-100 mg/kg feed) of a feminizing hormone diethylstilbestrol (DES). Contrary to expectation, all treatment groups produced 100% male populations. Survival, mating behaviour, gamete production, breeding output as well as expression of anti-Mullerian hormone (amh), ovarian (cyp19a1a) and brain (cyp19a1b) aromatase of masculinised fish were also examined. Survival (≤ 54.1 ± 7.3%) at termination of DES treatment was significantly lower compared with controls (88.6 ± 4.3%) but remained unaffected post treatment. Gonopodium thrusting frequency (33 ± 9.8 per 10 min) was not significantly different to untreated males just as sperm abundance (3.9 ± 1.5 × 108/male) and their motility (88.6 ± 29.1%). Importantly, paradoxically masculinised fish mated with virgin females and produced clutch sizes (22 ± 4) and progeny survival (87.0 ± %) that were comparable to that of untreated males. Masculinised testes showed high amh and low cyp19a1a expression, a pattern resembling those of untreated males. Production of paradoxically sex-reversed males with a capability to produce viable offspring has not been reported previously in this or other fish species. The outcomes support a feed-back regulation of oestrogenic pathways in this viviparous fish and could be useful for ecological applications such as controlling invasive fish populations.
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Affiliation(s)
- Jawahar G Patil
- Fisheries and Aquaculture Centre, IMAS, University of Tasmania, Australia; Inland Fisheries Service Tasmania, Australia.
| | - Nor Hakim Norazmi-Lokman
- Fisheries and Aquaculture Centre, IMAS, University of Tasmania, Australia; Faculty of Fisheries and Food Sciences, Universiti Malaysia Terengganu, Malaysia
| | - Tzu Nin Kwan
- Fisheries and Aquaculture Centre, IMAS, University of Tasmania, Australia
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12
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Seale AP, Pavlosky KK, Celino-Brady FT, Lerner DT. Sex, salinity and sampling period dependent patterns of growth hormone mRNA expression in Mozambique tilapia. AQUACULTURE (AMSTERDAM, NETHERLANDS) 2020; 519:734766. [PMID: 32863453 PMCID: PMC7451021 DOI: 10.1016/j.aquaculture.2019.734766] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tilapias comprise the second most aquacultured finfish group in the world. Such popularity stems in part from their tolerance to a wide range of environmental conditions and their sexually dimorphic nature, where males grow larger than females. As in other vertebrates, growth in tilapia is regulated by the growth hormone/ insulin like growth factor (GH/IGF) system. Moreover, environmental salinity has previously been shown to directly modulate growth in tilapia. Less is known, however, regarding how salinity may modulate sexually dimorphic growth. Utilizing a species of tilapia of high salinity tolerance, the Mozambique tilapia, Oreochromis mossambicus, we compared gh expression from the pituitary of male and female adults reared in fresh water (FW), seawater (SW), and a tidal regime (TR) characterized by dynamically changing salinities between FW and SW every six hours, over a 24 h period. We found significant effects of sex, salinity regime and whether fish were sampled during daylight or dark hours. In both sexes, gh expression was greater in fish reared in SW and TR compared with those in FW, and greater in fish sampled during dark hours, compared with those sampled in daylight hours. Pituitary gh expression was greater in males than in females reared in SW and TR, but not in FW. These results provide insight on the sex-specific modulation of gh expression by environmental factors in Mozambique tilapia.
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Affiliation(s)
- Andre P. Seale
- Department of Human Nutrition, Food, and Animal Sciences, University of Hawai’i at Mānoa, Honolulu, HI 96822, USA
- Hawai’i Institute of Marine Biology, University of Hawai’i, Kāne’ohe, HI 96744, USA
| | - K. Keano Pavlosky
- Hawai’i Institute of Marine Biology, University of Hawai’i, Kāne’ohe, HI 96744, USA
- Department of Molecular Biosciences and Bioengineering, University of Hawai’i at Mānoa, Honolulu, HI 96822, USA
| | - Fritzie T. Celino-Brady
- Department of Human Nutrition, Food, and Animal Sciences, University of Hawai’i at Mānoa, Honolulu, HI 96822, USA
| | - Darren T. Lerner
- University of Hawai’i Sea Grant College Program, University of Hawai’i at Mānoa, Honolulu, HI 96822, USA
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13
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Breton TS, Kenter LW, Greenlaw K, Montgomery J, Goetz GW, Berlinsky DL, Luckenbach JA. Initiation of sex change and gonadal gene expression in black sea bass (Centropristis striata) exposed to exemestane, an aromatase inhibitor. Comp Biochem Physiol A Mol Integr Physiol 2018; 228:51-61. [PMID: 30414915 DOI: 10.1016/j.cbpa.2018.10.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/24/2018] [Accepted: 10/30/2018] [Indexed: 12/25/2022]
Abstract
Many teleost fishes exhibit sequential hermaphroditism, where male or female gonads develop first and later undergo sex change. Model sex change species are characterized by social hierarchies and coloration changes, which enable experimental manipulations to better understand these processes. However, other species such as the protogynous black sea bass (Centropristis striata) do not exhibit these characteristics and instead receive research attention due to their importance in fisheries or aquaculture. Black sea bass social structure is unknown, which makes sex change sampling difficult, and few molecular resources are available. The purpose of the present study was to induce sex change using exemestane, an aromatase inhibitor, and assess gonadal gene expression using sex markers (amh, zpc2) and genes involved in steroidogenesis (cyp19a1a, cyp11b), estrogen signaling (esr1, esr2b), and apoptosis or atresia (aen, casp9, fabp11, parg, pdcd4, rif1). Overall, dietary exemestane treatment was effective, and most exposed females exhibited early histological signs of sex change and significantly higher rates of ovarian atresia relative to control females. Genes associated with atresia did not reflect this, however, as expression patterns in sex changing gonads were overall similar to those of ovaries, likely due to a whole ovary dilution effect of the RNA. Still, small but insignificant expression decreases during early sex change were detected for ovary-related genes (aen, casp9, fabp11, zpc2) and anti-apoptotic factors (parg, rif1). Exemestane treatment did not impact spermatogenesis or testicular gene expression, but testes were generally characterized by elevated steroidogenic enzyme and estrogen receptor mRNAs. Further research will be needed to understand these processes in black sea bass, using isolated ovarian follicles and multiple stages of sex change.
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Affiliation(s)
- Timothy S Breton
- Division of Natural Sciences, University of Maine at Farmington, 173 High Street, Farmington, ME 04938, USA.
| | - Linas W Kenter
- Department of Biological Sciences, University of New Hampshire, 38 College Road, Durham, NH 03824, USA
| | - Katherine Greenlaw
- Division of Natural Sciences, University of Maine at Farmington, 173 High Street, Farmington, ME 04938, USA
| | - Jacob Montgomery
- Division of Natural Sciences, University of Maine at Farmington, 173 High Street, Farmington, ME 04938, USA
| | - Giles W Goetz
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA
| | - David L Berlinsky
- Department of Agriculture, Nutrition, and Food Systems, University of New Hampshire, 46 College Road, Durham, NH 03824, USA
| | - J Adam Luckenbach
- Environmental and Fisheries Sciences Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, WA 98112, USA; Center for Reproductive Biology, Washington State University, Pullman, WA 99164, USA
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14
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Hoga CA, Almeida FL, Reyes FGR. A review on the use of hormones in fish farming: Analytical methods to determine their residues. CYTA - JOURNAL OF FOOD 2018. [DOI: 10.1080/19476337.2018.1475423] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Celia A. Hoga
- Department of Food Science, School of Food Engineering, University of Campinas – UNICAMP, Campinas, Brazil
| | - Fernanda L. Almeida
- Brazilian Agricultural Research Corporation, Embrapa Amazônia Ocidental, Manaus, Brazil
| | - Felix G. R. Reyes
- Department of Food Science, School of Food Engineering, University of Campinas – UNICAMP, Campinas, Brazil
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15
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Scheider J, Afonso-Grunz F, Jessl L, Hoffmeier K, Winter P, Oehlmann J. Morphological and transcriptomic effects of endocrine modulators on the gonadal differentiation of chicken embryos: The case of tributyltin (TBT). Toxicol Lett 2017; 284:143-151. [PMID: 29191790 DOI: 10.1016/j.toxlet.2017.11.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 11/20/2017] [Accepted: 11/22/2017] [Indexed: 11/29/2022]
Abstract
Morphological malformations induced by tributyltin (TBT) exposure during embryonic development have already been characterized in various taxonomic groups, but, nonetheless, the molecular processes underlying these changes remain obscure. The present study provides the first genome-wide screening for differentially expressed genes that are linked to morphological alterations of gonadal tissue from chicken embryos after exposure to TBT. We applied a single injection of TBT (between 0.5 and 30 pg as Sn/g egg) into incubated fertile eggs to simulate maternal transfer of the endocrine disruptive compound. Methyltestosterone (MT) served as a positive control (30 pg/g egg). After 19 days of incubation, structural features of the gonads as well as genome-wide gene expression profiles were assessed simultaneously. TBT induced significant morphological and histological malformations of gonadal tissue from female embryos that show a virilization of the ovaries. This phenotypical virilization was mirrored by altered expression profiles of sex-dependent genes. Among these are several transcription and growth factors (e.g. FGF12, CTCF, NFIB), whose altered expression might serve as a set of markers for early identification of endocrine active chemicals that affect embryonic development by transcriptome profiling without the need of elaborate histological analyses.
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Affiliation(s)
- Jessica Scheider
- Goethe University Frankfurt am Main, Institute for Ecology, Evolution and Diversity, Department Aquatic Ecotoxicology, Max-von-Laue-Str. 13, 60438, Frankfurt/M., Germany.
| | - Fabian Afonso-Grunz
- GenXPro GmbH, Altenhöferallee 3, 60438, Frankfurt/M., Germany; Goethe University Frankfurt am Main, Institute for Molecular BioSciences, Max-von-Laue-Str. 9, 60438, Frankfurt/M., Germany
| | - Luzie Jessl
- Goethe University Frankfurt am Main, Institute for Ecology, Evolution and Diversity, Department Aquatic Ecotoxicology, Max-von-Laue-Str. 13, 60438, Frankfurt/M., Germany; GenXPro GmbH, Altenhöferallee 3, 60438, Frankfurt/M., Germany
| | - Klaus Hoffmeier
- GenXPro GmbH, Altenhöferallee 3, 60438, Frankfurt/M., Germany
| | - Peter Winter
- GenXPro GmbH, Altenhöferallee 3, 60438, Frankfurt/M., Germany
| | - Jörg Oehlmann
- Goethe University Frankfurt am Main, Institute for Ecology, Evolution and Diversity, Department Aquatic Ecotoxicology, Max-von-Laue-Str. 13, 60438, Frankfurt/M., Germany
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16
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Pan ZJ, Zhu CK, Wang H, Zhou FJ, Qiang XG. Gonadal morphogenesis and sex differentiation in cultured Ussuri catfish Tachysurus ussuriensis. JOURNAL OF FISH BIOLOGY 2017; 91:866-879. [PMID: 28744861 DOI: 10.1111/jfb.13388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
The objective of this study was to investigate the optimal developmental time to perform sex reversal in Ussuri catfish Tachysurus ussuriensis, to develop monosex breeding in aquaculture. Systematic observations of gonadal sex differentiation of P. ussiriensis were conducted. The genital ridge formed at 9 days post fertilization (dpf) and germ cells begin to proliferate at 17 dpf. The ovarian cavity began forming on 21 dpf and completed by 25 dpf while presumptive testis remained quiescent. The primary oocytes were at the chromatin nucleolus stage by 30 dpf, the peri-nucleolus stage by 44 dpf and the cortical alveoli stage by 64 dpf. The germinal vesicle migrated towards the animal pole (polarization) at 120 dpf. In presumptive testis, germ cells entered into mitosis and blood vessels appeared in the proximal gonad on 30 dpf. The efferent duct anlage appeared on 36 dpf and formation of seminal lobules with spermatogonia and lobules interstitium occurred at 120 dpf. Therefore, gonadal sex differentiation occurred earlier in females than in males, with the histological differentiation preceding cytologic differentiation in T. ussuriensis. This indicates that undifferentiated gonads directly differentiate into ovary or testis between 17 and 21 dpf and artificial induction of sexual reversal by oral steroid administration must be conducted before 17 dpf.
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Affiliation(s)
- Z J Pan
- School of Life Science, Huaiyin Normal University, Huaian, 223300, China
| | - C K Zhu
- School of Life Science, Huaiyin Normal University, Huaian, 223300, China
| | - H Wang
- School of Life Science, Huaiyin Normal University, Huaian, 223300, China
| | - F J Zhou
- Huaian Fisheries Research Institute, Jiangsu Province, Huaian, 223001, China
| | - X G Qiang
- Huaian Fisheries Research Institute, Jiangsu Province, Huaian, 223001, China
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17
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Akhtar M, Ciji A, Sarma D, Rajesh M, Kamalam B, Sharma P, Singh A. Reproductive dysfunction in females of endangered golden mahseer ( Tor putitora ) in captivity. Anim Reprod Sci 2017; 182:95-103. [DOI: 10.1016/j.anireprosci.2017.05.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 05/08/2017] [Accepted: 05/14/2017] [Indexed: 11/15/2022]
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18
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Singh AK, Srivastava PP, Verma R, Srivastava SC, Kumar D, Ansari A. Effect of dietary administration of letrozole and tamoxifen on gonadal development, sex differentiation and biochemical changes in common carp (Cyprinus carpio L.). Reprod Fertil Dev 2017; 27:449-57. [PMID: 24411670 DOI: 10.1071/rd13234] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 11/23/2013] [Indexed: 11/23/2022] Open
Abstract
The effect of letrozole and tamoxifen on the specific growth rate (SGR; % day(-1)), gonado-somatic index (GSI), total haemoglobin (g%), gonadal and serum protein as well as lipid, sex differentiation and 17β-oestradiol levels were studied in sexually undifferentiated Cyprinus carpio fingerlings 30 days post fertilisation (30 dpf) for 60 days. Results showed decreased GSI with tamoxifen treatment whereas letrozole increased it. There were reduced protein, lipid, triglyceride and cholesterol levels after treatment with tamoxifen and letrozole during gonadal development. Tamoxifen (200mgkg(-1) feed) induced 82.5% masculinisation, whereas letrozole in the same dose produced 98.5% males. Gonadal 17β-oestradiol significantly declined from 86.0±1.41pg per 100mg (control) to 45.5±1.94pg per 100mg with tamoxifen and 36.0±0.72pg per 100mg with letrozole treatment. Similarly, serum 17β-oestradiol levels also decreased after tamoxifen and letrozole treatments. Testicular development in 37.8% of fish treated with tamoxifen and letrozole was found to be more advanced (spermatocytes) than in the control (spermatogonium); however, there was reduced ovarian growth and increased atresia. It was concluded that letrozole and tamoxifen both significantly affect sex differentiation and gonadal maturity in C. carpio leading to the production of sex-reversed males, yet the effect of letrozole was more potent.
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Affiliation(s)
- Atul K Singh
- Exotic Germplasm Section of Fish Health Management Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow-226002 (Uttar Pradesh), India
| | - P P Srivastava
- Biochemistry and Genomics Laboratory of Molecular Biology and Biotechnology Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow-226002 (Uttar Pradesh), India
| | - Rita Verma
- Exotic Germplasm Section of Fish Health Management Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow-226002 (Uttar Pradesh), India
| | - Sharad C Srivastava
- Exotic Germplasm Section of Fish Health Management Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow-226002 (Uttar Pradesh), India
| | - Dinesh Kumar
- Exotic Germplasm Section of Fish Health Management Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow-226002 (Uttar Pradesh), India
| | - Abubakar Ansari
- Exotic Germplasm Section of Fish Health Management Division, National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow-226002 (Uttar Pradesh), India
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He Y, Fang J, Xue L, Wu J, Dawar FU, Mei J. Potential contributions of heat shock proteins and related genes in sexual differentiation in yellow catfish (Pelteobagrus fulvidraco). FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:465-475. [PMID: 28243861 DOI: 10.1007/s10695-016-0303-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/12/2016] [Indexed: 06/06/2023]
Abstract
Sex determination and differentiation in ectotherms are very complicated affairs and usually affected by both genetic and environmental factors. Because of their temperature-sensitive expression, heat shock proteins (HSPs) are good candidates for temperature-dependent sex determination (TSD). Similar to most thermosensitive fish species, the male to female ratio increases with temperature in yellow catfish (Pelteobagrus fulvidraco). Yellow catfish is also a type of sexual size dimorphic fish, and the male individuals grow much faster than females of the same age. Therefore, research of sex differentiation in yellow catfish is important in aquiculture. In this attempt, a total of seven HSPs and related genes were identified from transcriptomes of yellow catfish by 454 pyrosequencing and Solexa sequencing that we did previously, including five genes with complete open reading frame (ORF). Phylogenetically, all these genes were compared with their counterparts from other vertebrates. All these genes were sex-biased expressed in gonads. Hspa5, Hip, and Cdc37 were expressed more highly in ovary than in testis, whereas Hsp90α, Hspb2, Hspb8, and Hspbp1 were expressed more highly in testis than in ovary. Additionally, the expression of these genes was assessed after 17α-methyltestosterone (MT) and 17α-ethinylestradiol (EE2) treatment, respectively. Our result showed that working as co-chaperones, these HSPs and related genes may regulate sex steroid receptor activities to influence gonad development in yellow catfish. Our work would help in the understanding of the mechanism of sexual differentiation in teleosts.
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Affiliation(s)
- Yan He
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Jie Fang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, 430070, China
| | - Liyao Xue
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, 430070, China
| | - Junjie Wu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, 430070, China
| | - Farman Ullah Dawar
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jie Mei
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Huazhong Agricultural University, Wuhan, 430070, China.
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20
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Shi H, Gao T, Liu Z, Sun L, Jiang X, Chen L, Wang D. Blockage of androgen and administration of estrogen induce transdifferentiation of testis into ovary. J Endocrinol 2017; 233:65-80. [PMID: 28148717 DOI: 10.1530/joe-16-0551] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 02/01/2017] [Indexed: 12/24/2022]
Abstract
Induction of sex reversal of XY fish has been restricted to the sex undifferentiated period. In the present study, differentiated XY tilapia were treated with trilostane (TR), metopirone (MN) and glycyrrhetinic acid (GA) (inhibitor of 3β-HSD, Cyp11b2 and 11β-HSD, respectively) alone or in combination with 17β-estradiol (E2) from 30 to 90 dah (days after hatching). At 180 dah, E2 alone resulted in 8.3%, and TR, MN and GA alone resulted in no secondary sex reversal (SSR), whereas TR + E2, MN + E2 and GA + E2 resulted in 88.3, 60.0 and 46.7% of SSR, respectively. This sex reversal could be rescued by simultaneous administration of 11-ketotestosterone (11-KT). Compared with the control XY fish, decreased serum 11-KT and increased E2 level were detected in SSR fish. Immunohistochemistry analyses revealed that Cyp19a1a, Cyp11b2 and Dmrt1 were expressed in the gonads of GA + E2, MN + E2 and TR + E2 SSR XY fish at 90 dah, but only Cyp19a1a was expressed at 180 dah. When the treatment was applied from 60 to 120 dah, TR + E2 resulted in 3.3% of SSR, MN + E2 and GA + E2 resulted in no SSR. These results demonstrated that once 11-KT was synthesized, it could antagonize E2-induced male-to-female SSR, which could be abolished by simultaneous treatment with the inhibitor of steroidogenic enzymes. The upper the enzyme was located in the steroidogenic pathway, the higher SSR rate was achieved when it was inhibited as some of the precursors, such as androstenedione, testosterone and 5α-dihydrotestosterone, could act as androgens. These results highlight the key role of androgen in male sex maintenance.
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Affiliation(s)
- Hongjuan Shi
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
| | - Tian Gao
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
| | - Zhilong Liu
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
| | - Lina Sun
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
| | - Xiaolong Jiang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
| | - Lili Chen
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
| | - Deshou Wang
- Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)Key Laboratory of Aquatic Science of Chongqing, School of Life Sciences, Southwest University, Chongqing, People's Republic of China
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21
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Dor L, Shirak A, Rosenfeld H, Ashkenazi IM, Band MR, Korol A, Ronin Y, Seroussi E, Weller JI, Ron M. Identification of the sex-determining region in flathead grey mullet (Mugil cephalus). Anim Genet 2016; 47:698-707. [PMID: 27611243 DOI: 10.1111/age.12486] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2016] [Indexed: 11/29/2022]
Abstract
Elucidation of the sex-determination mechanism in flathead grey mullet (Mugil cephalus) is required to exploit its economic potential by production of genetically determined monosex populations and application of hormonal treatment to parents rather than to the marketed progeny. Our objective was to construct a first-generation linkage map of the M. cephalus in order to identify the sex-determining region and sex-determination system. Deep-sequencing data of a single male was assembled and aligned to the genome of Nile tilapia (Oreochromis niloticus). A total 245 M. cephalus microsatellite markers were designed, spanning the syntenic tilapia genome assembly at intervals of 10 Mb. In the mapping family of full-sib progeny, 156 segregating markers were used to construct a first-generation linkage map of 24 linkage groups (LGs), corresponding to the number of chromosomes. The linkage map spanned approximately 1200 cM with an average inter-marker distance of 10.6 cM. Markers segregating on LG9 in two independent mapping families showed nearly complete concordance with gender (R2 = 0.95). The sex determining locus was fine mapped within an interval of 8.6 cM on LG9. The sex of offspring was determined only by the alleles transmitted from the father, thus indicating an XY sex-determination system.
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Affiliation(s)
- L Dor
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, 50250, Israel.,Robert H. Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, 76100, Israel
| | - A Shirak
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, 50250, Israel
| | - H Rosenfeld
- National Center for Mariculture, Israel Oceanographic and Limnological Research, Eilat, 88112, Israel
| | - I M Ashkenazi
- National Center for Mariculture, Israel Oceanographic and Limnological Research, Eilat, 88112, Israel
| | - M R Band
- The Carver Biotechnology Center, University of Illinois, Urbana, IL, 61801, USA
| | - A Korol
- Faculty of Science, Institute of Evolution, University Haifa, Haifa, 31905, Israel
| | - Y Ronin
- Faculty of Science, Institute of Evolution, University Haifa, Haifa, 31905, Israel
| | - E Seroussi
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, 50250, Israel
| | - J I Weller
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, 50250, Israel
| | - M Ron
- Institute of Animal Science, Agricultural Research Organization, Bet Dagan, 50250, Israel.
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22
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Kareem ZH, Abdelhadi YM, Christianus A, Karim M, Romano N. Effects of some dietary crude plant extracts on the growth and gonadal maturity of Nile tilapia (Oreochromis niloticus) and their resistance to Streptococcus agalactiae infection. FISH PHYSIOLOGY AND BIOCHEMISTRY 2016; 42:757-769. [PMID: 26643907 DOI: 10.1007/s10695-015-0173-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
A 90-day feeding trial was conducted on the growth performance, feeding efficacy, body indices, various hematological and plasma biochemical parameters, and histopathological examination of the gonads from male and female Nile tilapia fingerlings when fed different crude plant extracts from Cinnamomum camphora, Euphorbia hirta, Azadirachta indica, or Carica papaya at 2 g kg(-1) compared to a control diet. This was followed by a 14-day challenge to Streptococcus agalactiae. All treatments were triplicated, and each treatment consisted of 30 fish. Results showed that C. papaya extracts were the most effective at delaying gonadal maturation to both male and female tilapia, as well as significantly increasing (P < 0.05) growth performance compared to the control treatment. Similarly, dietary C. camphora and E. hirta extracts also significantly improved growth, while no significant growth effect was detected between the A. indica and control treatments (P > 0.05). Further, crude body lipid was lower in the C. camphora, E. hirta and C. papaya treatments, but was only significantly lower for the E. hirta treatment compared to the control. Meanwhile, none of the hematological or biochemical parameters were significantly affected, although plasma ALT was significantly lower for tilapia fed A. indica compared to the control. After the 14-day bacterial challenge, tilapia fed C. camphora supplementation had significantly higher survival, compared to the control, but was not significantly higher than the other supplemented diets. Results indicate that dietary C. papaya extract can significantly promote growth and delay gonadal maturation to both male and female tilapia, while C. camphora was the most effective prophylactic to S. agalactiae and may be a cost-effective and eco-friendly alternative to antibiotics.
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Affiliation(s)
- Zana H Kareem
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400, Serdang, Selangor, Malaysia
- Fish Resource and Aquatic Animal, College of Agriculture, Salahaddin University, Erbil, 44002, Kurdistan Region, Iraq
| | - Yasser M Abdelhadi
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan (UMK), 16100, Kota Bharu, Kelantan, Malaysia.
- The Central Laboratory for Aquaculture Research (CLAR), Abbassa, Abu-Hammad, Sharkia, 44662, Egypt.
| | - Annie Christianus
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400, Serdang, Selangor, Malaysia
| | - Murni Karim
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400, Serdang, Selangor, Malaysia
| | - Nicholas Romano
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400, Serdang, Selangor, Malaysia
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23
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Yu M, Liu W, Wang J, Qin J, Wang Y, Wang Y. Effects of tamoxifen on autosomal genes regulating ovary maintenance in adult mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:20234-20244. [PMID: 26304810 DOI: 10.1007/s11356-015-5245-5] [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: 05/14/2015] [Accepted: 08/13/2015] [Indexed: 06/04/2023]
Abstract
Environmental endocrine-disrupting chemicals (EDCs), known to bind to estrogen/androgen receptors and mimic native estrogens, have been implicated as a main source for increasing human reproductive and developmental deficiencies and diseases. Tamoxifen (TAM) is one of the most well-known antiestrogens with defined adverse effects on the female reproductive tract, but the mechanisms related to autosomal gene regulation governing ovary maintenance in mammals remain unclear. The expression pattern and levels of key genes and proteins involved in maintaining the ovarian phenotype in mice were analyzed. The results showed that TAM induced significant upregulation of Sox9, which is the testis-determining factor gene. The results showed that TAM induced significant upregulation of Sox9, the testis-determining factor gene, and the expression level of Sox9 mRNA in the ovaries of mice exposed to 75 or 225 mg/kg bw TAM was 2- and 10-fold that in the control group, respectively (p < 0.001). Furthermore, the testicular fibroblast growth factor gene, Fgf9, was also elevated in TAM-treated ovaries. Accordingly, expression of the ovary development marker, forkhead transcription factor (FOXL2), and WNT4/FST signaling, were depressed. The levels of protein expression changed consistently with the target genes. Moreover, the detection of platelet/endothelial cell adhesion molecule 1 (PECAM-1) in TAM-treated ovaries suggested the formation of vascular endothelial cells, which is a further evidence for the differentiation of the ovaries to a testis-like phenotype. During this period, the level of 17β-estradiol, progesterone, and luteinizing hormone decreased, while that of testosterone increased by 3.3-fold (p = 0.013). The activation of a testis-specific molecular signaling cascade was a potentially important mechanism contributing to the gender disorder induced by TAM, which resulted in the differentiation of the ovaries to a testis-like phenotype in adult mice. Limited with a relatively higher exposure, the present study provided preliminary molecular insights into the sexual disorder induced by antiestrogens and compounds that interrupted estrogen signaling by other modes of action.
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Affiliation(s)
- Mingxi Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, 116024, Dalian, Liaoning, China
| | - Wei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, 116024, Dalian, Liaoning, China
| | - Jingyun Wang
- School of Life Science and Biotechnology, Dalian University of Technology, No. 2 Linggong Road, 116024, Dalian, Liaoning, China.
| | - Junwen Qin
- Department of Developmental and Regenerative Biology, Key Laboratory for Regenerative Medicine (MOE), Jinan University, No. 601 West Huangpu Road, 510632, Guangzhou, Guangdong, China
| | - Yongan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, 116024, Dalian, Liaoning, China
| | - Yu Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, 116024, Dalian, Liaoning, China
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Gennotte V, Mafwila Kinkela P, Ulysse B, Akian Djétouan D, Bere Sompagnimdi F, Tomson T, Mélard C, Rougeot C. Brief exposure of embryos to steroids or aromatase inhibitor induces sex reversal in Nile tilapia (Oreochromis niloticus). ACTA ACUST UNITED AC 2015; 323:31-8. [DOI: 10.1002/jez.1893] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/27/2014] [Accepted: 08/28/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Vincent Gennotte
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
| | - Patrick Mafwila Kinkela
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
| | - Bernard Ulysse
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
| | - Dieudonné Akian Djétouan
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
| | - Frédéric Bere Sompagnimdi
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
| | - Thomas Tomson
- Centre de Recherche pour la Récupération des Energies Résiduelles; CERER Pisciculture; Tihange Belgium
| | - Charles Mélard
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
| | - Carole Rougeot
- Aquaculture Research and Education Center (CEFRA); AFFISH-RC; University of Liè; ge; Tihange Belgium
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25
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Matthiessen P, Weltje L. A review of the effects of azole compounds in fish and their possible involvement in masculinization of wild fish populations. Crit Rev Toxicol 2015; 45:453-67. [PMID: 25899164 DOI: 10.3109/10408444.2015.1018409] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Endocrine-mediated effects in fish populations have been widely documented. Most attention has been focused on feminization caused by estrogenic substances, but this paper reviews evidence for the effects of a group of fungicides and pharmaceuticals, the azoles, which have been reported to cause masculinization in fish. The paper considers information from laboratory studies on the effects of azole compounds on fish endocrinology, and on the potential existence of such effects in wild fish. The occurrence of some azoles in effluents and surface waters has also been briefly reviewed. Under laboratory conditions, many azoles are able to cause masculinization or defeminization in fish by inhibition of the P450 enzyme aromatase (CYP19). However, in no case where such effects have been observed in the field has a link been established with this group of substances. In most instances, other more convincing explanations have been proposed. Peak concentrations of some azoles in surface waters can approach those which, under continuous long-term exposure in the laboratory, might lead to some aromatase inhibition. However, available data on exposure and effects provide reassurance that the concentrations of azoles found in surface waters are too low to cause adverse effects in fish by interference with their endocrine system. Compared to the widespread observations of feminization and estrogenic effects in (male) fish, there are relatively few papers describing masculinization or defeminization in (female) wild fish populations, suggesting that this is quite a rare phenomenon. The significance of this result is emphasized by the fact that fish are among the best studied organisms in the environment.
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Affiliation(s)
- Peter Matthiessen
- Independent Consultant in Ecotoxicology, Old School House , Brow Edge, Backbarrow, Ulverston, Cumbria , UK
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26
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Literman R, Badenhorst D, Valenzuela N. qPCR-based molecular sexing by copy number variation in rRNA genes and its utility for sex identification in soft-shell turtles. Methods Ecol Evol 2014. [DOI: 10.1111/2041-210x.12228] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert Literman
- Department of Ecology, Evolution and Organismal Biology; Iowa State University; 251 Bessey Hall Ames IA 50011 USA
| | - Daleen Badenhorst
- Department of Ecology, Evolution and Organismal Biology; Iowa State University; 251 Bessey Hall Ames IA 50011 USA
| | - Nicole Valenzuela
- Department of Ecology, Evolution and Organismal Biology; Iowa State University; 251 Bessey Hall Ames IA 50011 USA
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27
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Yu M, Wang J, Liu W, Qin J, Zhou Q, Wang Y, Huang H, Chen W, Ma C. Effects of tamoxifen on the sex determination gene and the activation of sex reversal in the developing gonad of mice. Toxicology 2014; 321:89-95. [DOI: 10.1016/j.tox.2014.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 04/13/2014] [Accepted: 04/15/2014] [Indexed: 12/21/2022]
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28
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Garcia CEDO, Araújo BC, Mello PH, Narcizo ADM, Rodrigues-Filho JA, Medrado AT, Zampieri RA, Floeter-Winter LM, Moreira RG. Involvement of pituitary gonadotropins, gonadal steroids and breeding season in sex change of protogynous dusky grouper, Epinephelus marginatus (Teleostei: Serranidae), induced by a non-steroidal aromatase inhibitor. Gen Comp Endocrinol 2013; 192:170-80. [PMID: 23792264 DOI: 10.1016/j.ygcen.2013.06.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 06/06/2013] [Accepted: 06/10/2013] [Indexed: 11/21/2022]
Abstract
Two experiments were performed using the aromatase inhibitor (AI) letrozole (100mg/kg) to promote sex change, from female-to-male, in protogynous dusky grouper. One experiment was performed during the breeding season (spring) and the other at the end of the breeding season (summer). During the spring, AI promoted sex change after 9 weeks and the sperm produced was able to fertilize grouper oocytes. During the summer, the sex change was incomplete; intersex individuals were present and sperm was not released by any of the animals. Sex changed gonads had a lamellar architecture; cysts of spermatocytes and spermatozoa in the lumen of the germinal compartment. In the spring, after 4 weeks, 11ketotestosterone (11KT) levels were higher in the AI than in control fish, and after 9 weeks, coincident with semen release, testosterone levels increased in the AI group, while 11KT returned to the initial levels. Estradiol (E2) levels remained unchanged during the experimental period. Instead of decreasing throughout the period, as in control group, 17 α-OH progesterone levels did not change in the AI-treated fish, resulting in higher values after 9 weeks when compared with control fish. fshβ and lhβ gene expression in the AI animals were lower compared with control fish after 9 weeks. The use of AI was effective to obtain functional males during the breeding season. The increase in androgens, modulated by gonadotropins, triggered the sex change, enabling the development of male germ cells, whereas a decrease in E2 levels was not required to change sex in dusky grouper.
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Affiliation(s)
- Carlos Eduardo de O Garcia
- Instituto de Biociências, Universidade de São Paulo, Rua do Matão, Trav. 14, 321, São Paulo 05508-090, SP, Brazil; Centro de Biologia Marinha da Universidade de São Paulo (CEBIMar/USP), Rodovia Manoel Hypólito do Rego, Km. 131,5, São Sebastião CEP 11600-000, SP, Brazil
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29
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In vivo response of melatonin, gonadal activity and biochemical changes during CYP19 inhibited sex reversal in common carp Cyprinus carpio (L). Anim Reprod Sci 2013; 136:317-25. [DOI: 10.1016/j.anireprosci.2012.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 11/05/2012] [Accepted: 11/06/2012] [Indexed: 11/20/2022]
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