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Li X, Brighton Ndandala C, Zhou Q, Huang C, Li G, Chen H. Molecular cloning of estrogen receptor and its function on vitellogenesis in pompano (Trachinotus ovatus). Gen Comp Endocrinol 2024; 346:114403. [PMID: 37923147 DOI: 10.1016/j.ygcen.2023.114403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/22/2023] [Accepted: 10/31/2023] [Indexed: 11/07/2023]
Abstract
Estrogen receptors (ERs) play a critical role in vitellogenesis (Vtgs). However, the contribution of each ER for the regulation of vtgs expression was not analyzed clearly in teleosts. In the present study, three ers isoforms (erα, erβ1, and erβ2) were cloned in pompano (Trachinotus ovatus). Real-time PCR and enzyme-linked immunosorbent assay (ELISA) was used to detect the effects of 17β-estradiol (E2) on ERs and Vtgs in the liver of pompano. In vivo injection experiments showed that E2 significantly increased the expressions of ers and vtgs. ER broad spectrum antagonist Fulvestrant significantly attenuated the E2- induced up-regulation of ers and vtgs in a dose-dependent manner. ERα antagonist Methyl-piperidino pyrazole (MPP) significantly attenuated the up-regulation of erα, erβ2, vtg-B and vtg-C, and promoted the expressions of erβ1 and vtg-A. ERβ antagonist Cyclofenil significantly inhibited the expressions of erβ1, erβ2, vtg-A and vtg-C, and promoted the expressions of erα and vtg-B. In addition, E2 significantly increased the protein level of Vtg, while Fulvestrant, MPP and Cyclofenil significantly inhibited the protein level of Vtg in a dose-dependent manner. Our results indicate that E2 may regulate the expression of each vtg with different subtypes of ERs, and shows a distinct compensatory expression effect on the regulation for ers and vtgs, which provides a theoretical basis for reproductive endocrinology study in pompano.
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Affiliation(s)
- Xiaomeng Li
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China; Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources of Ministry of Education, Hainan Key Laboratory for Conservation and Utilization of Tropical Marine Fishery Resources, Yazhou Bay Innovation Institute, Hainan Tropical Ocean University, Sanya 572022, China
| | - Charles Brighton Ndandala
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China
| | - Qi Zhou
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Chunyan Huang
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Guangli Li
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Huapu Chen
- Guangdong Research Center on Reproductive Control and Breeding Technology of Indigenous Valuable Fish Species, Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China; Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources of Ministry of Education, Hainan Key Laboratory for Conservation and Utilization of Tropical Marine Fishery Resources, Yazhou Bay Innovation Institute, Hainan Tropical Ocean University, Sanya 572022, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524025, China.
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Xu X, Wang X, Liu Q, Qi X, Zhou L, Liu H, Li J. New insights on folliculogenesis and follicular placentation in marine viviparous fish black rockfish (Sebastes schlegelii). Gene X 2022; 827:146444. [PMID: 35378250 DOI: 10.1016/j.gene.2022.146444] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 01/28/2022] [Accepted: 03/18/2022] [Indexed: 02/04/2023] Open
Abstract
In viviparous fish, a considerable degree of variation in placental structures have been described. However, no distinct structures are reported in Scorpaenidae. In this study, we demonstrate a new type of folliculogenesis and follicular placentation in Sebastes schlegelii. Before copulation, the germinal epithelium gradually surrounds the oocytes and develops into individually follicles with a stalk-like structure hanging on the ovigerous lamella, which ensures each follicle have access to spermatozoa after copulation. From V to early gestation stage, the cyp17-I highly expressesaccompanied by cyp19a1a signals disappearance, and 11-ketotestosterone level keeps rising and peaks at blastula stage, while 17β-estradiol declines to the bottom. Meanwhile, the theca cells rapidly proliferate and invade outwards forming a highly hypertrophied and folded microvillous placenta. This unbalance of hormone might be an important factor driving the theca cells proliferation and invasion. Additionally, some conserved genes related to mammalian placentation are significantly high expression in follicular placenta suggesting the high convergence in vertebrate placenta evolution.
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Affiliation(s)
- Xiaojie Xu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xueying Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Qinghua Liu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
| | - Xin Qi
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Ocean University of China, Qingdao 266003, PR China
| | - Li Zhou
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haoming Liu
- Weihai Shenghang Aquatic Science and Technology Co., LTD, Weihai, China; Fisheries Research Institute of Huancui District, Weihai, China
| | - Jun Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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3
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Li J, Lyu L, Wen H, Li Y, Wang X, Zhang Y, Yao Y, Qi X. Comparative transcriptomic analysis of gonadal development and renewal in the ovoviviparous black rockfish (Sebastes schlegelii). BMC Genomics 2021; 22:874. [PMID: 34863110 PMCID: PMC8642938 DOI: 10.1186/s12864-021-08169-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 11/10/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The black rockfish (Sebastes schlegelii) has an ovoviviparous reproductive pattern and long-term sperm storage, resulting in asynchronous gonadal development between the sexes. However, the comprehensive understanding of gonadal development in black rockfish has not yet been achieved. Here, we studied gonadal development and germ cell renewal using histology and RNA-seq. RESULTS In this study, RNA-seq was performed on testes and ovaries to characterize key pathways and genes that are active during development and gamete maturation in black rockfish. Differentially expressed genes (DEGs) were identified and annotated in 4 comparisons (F_III vs. F_IV, F_IV vs. F_V, M_III vs. M_IV and M_IV vs. M_V). Based on analysis of DEGs enriched in the testis, 11 and 14 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways were mapped to the M_III vs. M_IV group and the M_IV vs. M_V group, respectively. DEGs in ovarian development were also classified into 10 groups according to their biological functions. The expression patterns of the selected genes determined by qPCR were significantly correlated with the RNA-Seq results, supporting the reliability and accuracy of the RNA-Seq analysis. E2 levels showed down regulation from previtellogenesis to mature stage in female and T level showed down regulation from spermatogenesis to regressed stage in the male. CONCLUSIONS The categories "intercellular interaction and cytoskeleton", "molecule amplification" and "repair in the cell cycle" were revealed to be crucial in testis development and spermatogenesis, as was the biosynthesis of a series of metabolites. Our results provide comprehensive insight into black rockfish gonadal development and provide a basis for further study of reproductive physiology and molecular biology in ovoviviparity teleosts.
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Affiliation(s)
- Jianshuang Li
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Likang Lyu
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Haishen Wen
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Yun Li
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Xiaojie Wang
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Ying Zhang
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Yijia Yao
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China
| | - Xin Qi
- College of Fishery, Ocean University of China, Qingdao, 266000, P. R. China.
- Key Laboratory of Mariculture, Ocean University of China, Ministry of Education, Qingdao, 266003, P. R. China.
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Zapater C, Molés G, Muñoz I, Pinto PIS, Canario AVM, Gómez A. Differential involvement of the three nuclear estrogen receptors during oogenesis in European sea bass (Dicentrarchus labrax)†. Biol Reprod 2018; 100:757-772. [DOI: 10.1093/biolre/ioy227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 08/06/2018] [Accepted: 10/25/2018] [Indexed: 11/13/2022] Open
Affiliation(s)
- Cinta Zapater
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre la Sal, Consejo Superior de Investigaciones Científicas (CSIC), Torre la Sal, Castellón, Spain
| | - Gregorio Molés
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre la Sal, Consejo Superior de Investigaciones Científicas (CSIC), Torre la Sal, Castellón, Spain
| | - Iciar Muñoz
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre la Sal, Consejo Superior de Investigaciones Científicas (CSIC), Torre la Sal, Castellón, Spain
| | - Patricia I S Pinto
- Centre of Marine Sciences (CCMAR), University of Algarve, Gambelas, Faro, Portugal
| | - Adelino V M Canario
- Centre of Marine Sciences (CCMAR), University of Algarve, Gambelas, Faro, Portugal
| | - Ana Gómez
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre la Sal, Consejo Superior de Investigaciones Científicas (CSIC), Torre la Sal, Castellón, Spain
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Hou ZS, Wen HS, Li JF, He F, Li Y, Tao YX. Expression of estrogen receptors in female rainbow trout (Oncorhynchus mykiss) during first ovarian development and under dense rearing condition. Gen Comp Endocrinol 2018; 259:1-11. [PMID: 29017850 DOI: 10.1016/j.ygcen.2017.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 09/07/2017] [Accepted: 10/06/2017] [Indexed: 10/18/2022]
Abstract
To study the expression of four estrogen receptor genes (erα1, erα2, erβ1, erβ2) of female rainbow trout (Oncorhynchus mykiss) during first ovarian development, trouts were sampled from different ovarian stages. Serum E2 (estradiol) was measured by ELISA and estrogen receptors mRNA expression were examined by qRT-PCR. Our results showed a close association between increased erα1 and vitellogenin mRNA expression during ovarian maturation and increased erα2 mRNA expression in mature ovarian stages. Correlation analysis revealed that a negative relationship between serum E2 and ovarian erβ1 (or hepatic erβ2), but ovarian erβ2 mRNA expression was relatively unchanged during first ovarian development. Trout were also reared in different densities as stocking density 1, 2 and 3 (SD1, 4.6-31.1 kg/m3; SD2, 6.6-40.6 kg/m3; SD3, 8.6-49.3 kg/m3) to elucidate effects of high density on estrogen receptor expression. Histology observation showed ovarian development of trout in higher densities were retard with a relatively early stage and fewer vitellogenin accumulation. Trout in high densities showed significantly decreased serum E2, erα mRNA expression and increasing trends of erβ mRNA expression. A noticeable increase of ovarian erβ2 mRNA expression was seen in trout when density is approaching to 50 kg/m3. In conclusion, we may hypothesize that increased erβ mRNA expression triggered by high density result in decreased erα mRNA expression and vitellogenesis. As a result, ovarian development in higher densities was retard.
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Affiliation(s)
- Zhi-Shuai Hou
- Fisheries College, Ocean University of China, Qingdao 266003, China; Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, United States
| | - Hai-Shen Wen
- Fisheries College, Ocean University of China, Qingdao 266003, China.
| | - Ji-Fang Li
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Feng He
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Yun Li
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Ya-Xiong Tao
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, United States
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Lü ZM, Liu W, Liu LQ, Wang TM, Shi HL, Ping HL, Chi CF, Yang JW, Wu CW. Cloning, Characterization, and Expression Profile of Estrogen Receptor in Common Chinese Cuttlefish, Sepiella japonica. ACTA ACUST UNITED AC 2017; 325:181-93. [PMID: 27076436 DOI: 10.1002/jez.2011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 02/18/2016] [Indexed: 01/08/2023]
Abstract
Sex steroid hormones are widely detected in molluscs and play important roles in sex determination, gonadal tissue maturation, and gametogenesis. Nevertheless, the signaling pathways of sex steroids in cephalopod have not yet been clearly elucidated. In the present study, a full-length sequence encoding the estrogen receptor (ER) was isolated from common Chinese cuttlefish, Sepiella japonica. The sjER cDNA clone was found to contain 1,788 nucleotides including a 1,470 bp open reading frame encoding 489 amino acid (aa) residues. The deduced ER protein consisted of six nuclear receptor characteristic domains. Based on a phylogenetic analysis, the ER DNA-binding domain and ligand-binding domain are highly conserved compared to other mollusc ERs. Highest aa identities were found for sjER with common octopus (Octopus vulgaris) ER (89%) and pacific oyster (Crassostrea gigas) ER (61%). Tissue expression analysis confirmed that sjER was widely distributed among tissues and predominantly expressed in the brain, liver, gonad (testis and ovary), and other accessory sexual gland (nidamental gland). The ER expression was temporally upregulated in the brain, liver, and ovary during the early sexual maturation period in S. japonica, which is coincident with the fluctuation of ovary estradiol content. These suggest that sjER may be involved in regulating the reproductive cycle of S. japonica. A fusion protein transient transfections assay showed that sjER was mainly located in the nucleus, suggesting a possible orthodox working mechanism of S. japonica ER in the nucleus through a ligand-dependent activation of specific gene transcription.
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Affiliation(s)
- Zhen-Ming Lü
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
| | - Wan Liu
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
| | - Li-Qin Liu
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
| | - Tian-Ming Wang
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
| | - Hui-Lai Shi
- Marine Fisheries Research Institute of Zhejiang Province, Zhoushan, China
| | - Hong-Ling Ping
- Marine Fisheries Research Institute of Zhejiang Province, Zhoushan, China
| | - Chang-Feng Chi
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
| | - Jing-Wen Yang
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
| | - Chang-Wen Wu
- National Engineering Research Center for Facilitated Marine Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, China
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Chi ML, Wen HS, Ni M, He F, Li JF, Qian K, Zhang P, Chai SH, Ding YX, Yin XH. Molecular identification of genes involved in testicular steroid synthesis and characterization of the responses to hormones stimulation in testis of Japanese sea bass (Lateolabrax japonicas). Steroids 2014; 84:92-102. [PMID: 24704264 DOI: 10.1016/j.steroids.2014.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 03/21/2014] [Indexed: 11/20/2022]
Abstract
Testicular steroids are critical hormones for the regulation of spermatogenesis in male teleosts and their productions have been reported to be regulated by gonadotropins and gonadotropin-releasing hormone. In the Japanese sea bass (Lateolabrax japonicas), the reproductive endocrine, particularly regarding the production and regulation of testicular steroids, are not well understood. For this reason, we first cloned and characterized the response of several key genes regulating the production of testicular steroids and, second, we analyzed the changes of mRNA profiles of these genes during testicular development cycle and in the administration of hCG and GnRHa with corresponding testosterone level in serum, GSI and histological analyses. We succeeded in cloning the full-length cDNAs for the fushi tarazu factor-1 (FTZ-F1) homologues (FTZ-F1a and FTZ-F1b), steroidogenic acute regulatory protein (StAR) and anti-Müllerian hormone (AMH) in Japanese sea bass. Multiple sequence alignment and phylogenetic analysis of these proteins clearly showed that these genes in Japanese sea bass were homologous to those of other piscine species. During the testicular development cycle and hCG/GnRHa administration, quantification of jsbStAR transcripts revealed a trend similar to their serum testosterone levels, while a reciprocal relationship was founded between the serum concentrations of testosterone and jsbAMH and the links between gonadal expression of jsbStAR, jsbAMH and jsbFTZ-F1 were also observed. Our results have identified for the first time several key genes involved in the regulation of steroid production and spermatogenesis in the Japanese sea bass testis and these genes are all detected under gonadotropic hormone and gonadotropin-releasing hormone control.
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Affiliation(s)
- Mei L Chi
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Hai S Wen
- Fisheries College, Ocean University of China, Qingdao 266003, China.
| | - Meng Ni
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Feng He
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Ji F Li
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Kun Qian
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Pei Zhang
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Sen H Chai
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Yu X Ding
- Fisheries College, Ocean University of China, Qingdao 266003, China
| | - Xiang H Yin
- Fisheries College, Ocean University of China, Qingdao 266003, China
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8
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Nagasawa K, Presslauer C, Kirtiklis L, Babiak I, Fernandes JMO. Sexually dimorphic transcription of estrogen receptors in cod gonads throughout a reproductive cycle. J Mol Endocrinol 2014; 52:357-71. [PMID: 24647045 DOI: 10.1530/jme-13-0187] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The role of sex steroid regulation in gonadal maturation is a very complex process that is far from being fully understood. Hence, we have investigated seasonal changes in gonadal expression of estrogen receptors (ERs) in Atlantic cod (Gadus morhua L.), a batch spawner, throughout the annual reproductive cycle. Three nuclear ER partial cDNA sequences (esr1, esr2a, and esr2b) were cloned and all esr transcripts were detected mainly in liver and gonads of fish of both sexes. In situ hybridization of esrs along with germ cell (vasa) and gonadal somatic cell markers (gonadal soma-derived factor (gsdf), 3β-hydroxysteroid dehydrogenase (3βhsd), and anti-Müllerian hormone (amh) for testicular, or gsdf for ovarian somatic cells) showed that all three esrs were preferentially localized within interstitial fibroblasts composed of immature and mature Leydig cells in testis, whereas they were differentially expressed in both follicular cells and oocytes in ovary. Quantitative real-time PCR analysis revealed a sexually dimorphic expression pattern of the three esr paralogs in testis and ovary. A significant increase in esr2a expression was identified in testis and of esr2b in ovary, whereas esr1 transcripts were elevated in both testis and ovary in February and March before the spawning period. The localization and sexually dimorphic expression of esr genes in gonads indicate a direct function of estrogen via ERs in gonadal somatic cell growth and differentiation for Leydig cell in testis and follicular cells in ovary throughout the annual reproductive cycle in Atlantic cod.
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Affiliation(s)
- Kazue Nagasawa
- Faculty of Biosciences and AquacultureUniversity of Nordland, 8049 Bodø, NorwayDepartment of ZoologyFaculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-718 Olsztyn, Poland
| | - Christopher Presslauer
- Faculty of Biosciences and AquacultureUniversity of Nordland, 8049 Bodø, NorwayDepartment of ZoologyFaculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-718 Olsztyn, Poland
| | - Lech Kirtiklis
- Faculty of Biosciences and AquacultureUniversity of Nordland, 8049 Bodø, NorwayDepartment of ZoologyFaculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-718 Olsztyn, PolandFaculty of Biosciences and AquacultureUniversity of Nordland, 8049 Bodø, NorwayDepartment of ZoologyFaculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-718 Olsztyn, Poland
| | - Igor Babiak
- Faculty of Biosciences and AquacultureUniversity of Nordland, 8049 Bodø, NorwayDepartment of ZoologyFaculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-718 Olsztyn, Poland
| | - Jorge M O Fernandes
- Faculty of Biosciences and AquacultureUniversity of Nordland, 8049 Bodø, NorwayDepartment of ZoologyFaculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-718 Olsztyn, Poland
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9
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Mu WJ, Wen HS, Li JF, He F. Cloning and expression analysis of Foxl2 during the reproductive cycle in Korean rockfish, Sebastes schlegeli. FISH PHYSIOLOGY AND BIOCHEMISTRY 2013; 39:1419-1430. [PMID: 23546994 DOI: 10.1007/s10695-013-9796-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Accepted: 03/23/2013] [Indexed: 06/02/2023]
Abstract
Foxl2 is a member of the winged helix/forkhead family of transcription factors and is known to regulate ovarian aromatase, which plays a crucial role in ovarian differentiation. To address the role of Foxl2 in gonads and brain during gonadal development, we isolated the full-length cDNA of Foxl2 and analyzed its spatiotemporal expression patterns in the viviparous teleost Korean rockfish, Sebastes schlegeli. Tissue distribution pattern revealed that the Foxl2 was detected in the liver, fat, gill, brain, and ovary, but could hardly be found in the testis. Reverse transcriptase PCR suggested that Foxl2 in Korean rockfish may involve in ovary development in the study of expression level during gonads development. It also revealed that the stage of highest expression level for Foxl2 was almost much earlier than cyp19a1a and cyp19a1b during the gonadal development stage in gonads and brain except for cyp19a1a in brain. Furthermore, the expression pattern of Foxl2 as well as aromatases may imply the role of Foxl2 in the up-regulation of aromatases not only in the female fish but also in male.
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Affiliation(s)
- Wei J Mu
- Fisheries College, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China
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10
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Mu W, Wen H, Li J, He F. Cloning and expression analysis of a HSP70 gene from Korean rockfish (Sebastes schlegeli). FISH & SHELLFISH IMMUNOLOGY 2013; 35:1111-1121. [PMID: 23877000 DOI: 10.1016/j.fsi.2013.07.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 06/27/2013] [Accepted: 07/11/2013] [Indexed: 06/02/2023]
Abstract
The gene encoding HSP70 was isolated from Korean rockfish Sebastes schlegeli by homologous cloning and rapid amplification of cDNA ends (RACE). The full-length of HSP70 cDNA was composed of 2259 bp and encoded a polypeptide of 639 amino acids. BLAST analysis showed that HSP70 of S. schlegeli shared high identities with those of the Lates calcarifer, Oreochromis niloticus, Seriola quinqueradiata HSP70s (88-89%). Our current study also revealed that HSP70 of Korean rockfish was expressed in many tissues by RT-PCR under unstressed condition. Quantitative real-time PCR showed that the expression patterns of Korean rockfish HSP70 were developmental stage-dependency. The expression of HSP70 was measured by quantitative real-time PCR after different oxygen treatments. The results showed that expression of HSP70 increased significantly after exposure to hypoxia for 30 min in gill and ovary, and then decreased for 60 min, and the level in spleen and liver gradually increased and reached the highest at 60 min. In addition, in gill, spleen and liver, the HSP70 mRNA level reached the maximum in hypoxia group after one hour different oxygen concentration stress. Increased amounts of serum thyroxine (T4), and triiodothyronine (T3) were also found during 30 min hypoxia treatment and 60 min normoxia group in our study. All of the results provide information to further study the mechanism of physiology and immune function under stress conditions of ovoviviparous teleosts.
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Affiliation(s)
- Weijie Mu
- Fisheries College, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
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Mu W, Wen H, Shi D, Yang Y. Molecular cloning and expression analysis of estrogen receptor betas (ERβ1 and ERβ2) during gonad development in the Korean rockfish, Sebastes schlegeli. Gene 2013; 523:39-49. [DOI: 10.1016/j.gene.2013.03.109] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 03/20/2013] [Accepted: 03/25/2013] [Indexed: 10/26/2022]
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Mu WJ, Wen HS, He F, Li JF, Liu M, Zhang YQ, Hu J, Qi BX. Cloning and expression analysis of follicle-stimulating hormone and luteinizing hormone receptor during the reproductive cycle in Korean rockfish (Sebastes schlegeli). FISH PHYSIOLOGY AND BIOCHEMISTRY 2013; 39:287-298. [PMID: 22843313 DOI: 10.1007/s10695-012-9699-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Accepted: 07/18/2012] [Indexed: 06/01/2023]
Abstract
Full-length cDNA sequences encoding the receptors for follicle-stimulating hormone (FSHR) and luteinizing hormone (LHR) were isolated from ovary of Korean rockfish (Sebastes schlegeli) using reverse transcription-polymerase chain reaction (PCR) and rapid amplification of cDNA ends procedures. The cDNA of the KrFSHR encodes a predicted protein of 703 amino acids that showed the greatest homology with European seabass (Dicentrarchus labrax) (78 %) and gilthead seabream (Sparus aurata) (73 %). The cDNA of the KrLHR encodes a predicted protein of 703 amino acids and exhibited the highest homology with European seabass (Dicentrarchus labrax) (79 %) and gilthead seabream (Sparus aurata) (76 %). Besides the gonads, expressions of GTHRs mRNA were also obtained in extra gonadal tissues. Seasonal changes in the gonads expression profiles of KrGTHRs mRNA were examined by quantitative real-time PCR, and the present results suggest that levels for KrFSHR mRNA increase during gonadal growth, whereas KrLHR shows high levels during the late gamete generation period. Our study provides molecular characterization of the GTHRs and expressions profile during reproductive cycles, reinforcing previous knowledge of GTHRs important role in the reproductive endocrine regulation of Korean rockfish.
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Affiliation(s)
- Wei J Mu
- Fisheries College, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
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Kwon JY, Kim J. Differential expression of two distinct aromatase genes (cyp19a1aandcyp19a1b) during vitellogenesis and gestation in the viviparous black rockfishSebastes schlegelii. Anim Cells Syst (Seoul) 2013. [DOI: 10.1080/19768354.2013.773941] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Ding Y, He F, Wen H, Li J, Qian K, Chi M, Ni M, Yin X, Bu Y, Zhao Y, Zhang D. Polymorphism in exons CpG rich regions of the cyp17-II gene affecting its mRNA expression and reproductive endocrine levels in female Japanese flounder (Paralichthys olivaceus). Gen Comp Endocrinol 2012; 179:107-14. [PMID: 22906424 DOI: 10.1016/j.ygcen.2012.08.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 07/28/2012] [Accepted: 08/02/2012] [Indexed: 11/23/2022]
Abstract
Cytochrome P450c17-II (cyp17-II) gene is an important factor affecting the growth, gonad differentiation and development, and other reproductive traits of fish. There are three CpG rich regions in the coding region of cyp17-II gene in Japanese flounder (Paralichthys olivaceus). The aim of this study was to understand whether mutations in exons of the cyp17-II gene occured at CpG sites, and mutations and methylation status of those CpG sites were involved in regulation of the expression level of cyp17-II gene and the reproductive endocrine of Japanese flounder. The results showed that three single nucleotide polymorphisms (SNPs) were identified. SNP1 [(c. G594A (p.Gly 188Arg)] located in exon 4 of L1 locus, and SNP2 (c.A939G) and SNP3 (c.C975T) of L2 locus located in CpG rich region of the exon 6 of cyp17-II gene. Furthermore, the A to G transition at 939bp position added a new methylation site to the cyp17-II coding region. According to multiple-comparison analysis, two loci (L1 and L2) were significantly associated with serum testosterone (T) level (P<0.05) and the expression of cyp17-II in ovary (P<0.01). Intriguingly, individuals with GG genotype of L2 locus containing eight CpG methylation sites had significantly lower serum testosterone level and cyp17-II mRNA expression than those with AA genotype containing seven CpG methylation sites. Moreover, the CpG site was highly methylated (≥77.8%) at 938 bp position of individuals with GG genotype of L2 locus. These implied that the mutation and methylation status of the coding region of cyp17-II could influence the gene expression and the reproductive endocrine levels in female Japanese flounder and L2 locus could be regarded as a candidate genetic or epigenetic marker for Japanese flounder breeding programs.
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Affiliation(s)
- YuXia Ding
- Fisheries College, Ocean University of China, Qingdao 266003, PR China
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