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Abstract
Oryzias dancena (Beloniformes; Teleostei), is a euryhaline teleost that mainly inhabits the brackish or freshwater of river mouths and estuaries around the Bay of Bengal and the Malay Peninsula. It also has a short interval between generations, with spawning possibilities just 60 days after hatching. The aim of this paper is to provide a review for the study of O. dancena based on the studies collected so far, and could form the basis for a wide category of researches including zootoxy, cytogenetics, anesthesia, tagging, salinity tolerance, reproduction, fish disease, chromosome engineering, and trnasgenesis in order to highlight the recent progress in different fields of study using this species.
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Affiliation(s)
- In-Seok Park
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime & Ocean University, Busan, 49112, Republic of Korea.
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Maeng S, Yoon SW, Kim EJ, Nam YK, Sohn YC. Transcriptional Activity of an Estrogen Receptor β Subtype in the Medaka Oryzias dancena. Dev Reprod 2020; 23:333-344. [PMID: 31993539 PMCID: PMC6985291 DOI: 10.12717/dr.2019.23.4.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 09/20/2019] [Accepted: 09/29/2019] [Indexed: 11/17/2022]
Abstract
In vertebrate reproductive system, estrogen receptor (ER) plays a pivotal role in
mediation of estrogenic signaling pathways. In the present study, we report the
cDNA cloning, expression analysis, and transcriptional activity of ERβ1
subtype from medaka Oryzias dancena. The deduced O.
dancena ERβ1 (odERβ1; 519 amino acids) contained six
characteristic A/B to E/F domains with very short activation function 2 region
(called AF2). A phylogenetic analysis indicated that odERβ1 was highly
conserved among teleost ERβ1 subgroup. A conventional RT-PCR revealed
that the odERβ1 transcripts were widely distributed in
the multiple tissues, the ovary, brain, gill, intestine, kidney, and muscle.
Further, the relatively higher odERβ1 expressions in the
ovary and brain were clearly reproduced in RT-qPCR assay. When HA-fused
odERβ1 expression vector was transfected into HEK293 cells, an
immunoreactivity for odERβ1 was mainly detected in the nucleus part.
Finally, an estrogen responsive element driven luciferase reporter assays
demonstrated that the transcriptional activity of odERβ1 significantly
increased by estradiol-17β (E2) in a dose dependent manner
(p<0.05). However, fold-activation of odERβ1
in the presence of E2 was markedly weak, when it compared with those of
O. latipes ERβ1. Taken together, these data suggest
that odERβ1 represents a functional variant of teleost ERβ subtype
and provides a basic tool allowing future studies examining the function of F
domain of ERβ1 subtype and expanding our knowledge of ERβ
evolution.
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Affiliation(s)
- Sejung Maeng
- Dept. of Marine Molecular Biosciences, Gangneung-Wonju National University, Gangneung 25457, Korea
| | - Sung Woo Yoon
- Dept. of Marine Molecular Biosciences, Gangneung-Wonju National University, Gangneung 25457, Korea
| | - Eun Jeong Kim
- Dept. of Marine Bio-Materials and Aquaculture, Pukyong National University, Busan 48513, Korea
| | - Yoon Kwon Nam
- Dept. of Marine Bio-Materials and Aquaculture, Pukyong National University, Busan 48513, Korea
| | - Young Chang Sohn
- Dept. of Marine Molecular Biosciences, Gangneung-Wonju National University, Gangneung 25457, Korea
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Park IS, Baek SW, Moon KH. The Sterilization Effect of Methylene Blue, Formalin, and Iodine on Egg and Adult Stage of Marine Medaka, Oryzias dancena. Dev Reprod 2019; 23:199-211. [PMID: 31660447 PMCID: PMC6812971 DOI: 10.12717/dr.2019.23.3.199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/27/2019] [Indexed: 11/17/2022]
Abstract
The sterilization effects of methylene blue (MB), formalin, and iodine on the egg of marine medaka, Oryzias dancena, were investigated for disinfecting naididae worm, Chaetogaster diastrophus through sterilization. To determine harmfulness of MB, formalin, and iodine, lethal concentrations 50 (LC50) of three chemicals were analyzed in the eggs of marine medaka. The sterilized periods of each chemical were set at 1 hr. Sterilized rates of naididae worm in each chemical were significantly affected and increased drastically as the concentration of each chemical increased (p<0.05). Sterilization abilities of naididae worm were most effective for formalin, but survival rates of egg and hatched rates for formalin were lowest among each chemical. The LC50 of MB over 96 hrs were 185.26, 103.84, and 127.15 ppm for adults, juveniles, and eggs respectively. The toxic effects of MB were clearly dose dependent for each life stage (p<0.05). The toxicity sensitivity of juveniles to MB was dramatically higher than that of other groups. In 48 hrs after sterilization, cortisol and glucose concentrations of the adult group with MB treatment were significantly higher than those of the adult group with no treatment (p<0.05). This research provides useful data on sterilization effect of MB, formalin, and iodine, acute toxicity in marine medaka egg and toxicity, sensitivity of life stage of MB in marine medaka.
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Affiliation(s)
- In-Seok Park
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime & Ocean University, Busan 49112, Korea
| | - Se-Won Baek
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime & Ocean University, Busan 49112, Korea
| | - Ki Hwan Moon
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime & Ocean University, Busan 49112, Korea
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Yan J, Gao Q, Cui Z, Yang G, Long Y. Molecular characterization of the giant freshwater prawn ( Macrobrachium rosenbergii) beta-actin gene promoter. PeerJ 2018; 6:e5701. [PMID: 30386688 PMCID: PMC6202971 DOI: 10.7717/peerj.5701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/06/2018] [Indexed: 12/30/2022] Open
Abstract
Constitutive promoters are important tools for gene function studies and transgenesis. The Beta-actin (actb1) gene promoter has been isolated from many species but remains to be cloned from the giant freshwater prawn (Macrobrachium rosenbergii). In this study, we cloned and characterized the Mractb1 gene promoter. Two alternative promoters were identified for the Mractb1 gene, which direct the generation of two transcripts with different 5′ untranslated regions. Three CpG islands were predicted in the upstream sequence, which are intimately related to transcription initiation and promoter activity. In addition to the CCAAT-box and the CArG-box, molecular dissection of the flanking sequence revealed the existence of one negative and two positive elements in the upstream region and the first intron. Finally, the Mractb1 promoter demonstrated comparative activity to the carp (Cyprinus carpio) actb1 promoter. Our investigations provide a valuable genetic tool for gene function studies and shed light on the regulation of the Mractb1 gene.
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Affiliation(s)
- Junjun Yan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Qiang Gao
- Zhejiang Institute of Freshwater Fisheries, Huzhou, China
| | - Zongbin Cui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | | | - Yong Long
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
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Functional Analysis of the Promoter Region of Japanese Flounder ( Paralichthys olivaceus) β-actin Gene: A Useful Tool for Gene Research in Marine Fish. Int J Mol Sci 2018; 19:ijms19051401. [PMID: 29738459 PMCID: PMC5983668 DOI: 10.3390/ijms19051401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/21/2018] [Accepted: 05/02/2018] [Indexed: 12/16/2022] Open
Abstract
A newly isolated Japanese flounder (Paralichthys olivaceus) β-actin promoter and its derivative compact construct Poβ-actinΔ−1080/−801Δ−500/−201 have recently been demonstrated to promote ectopic gene expression in cell lines. Different Poβ-actin promoter deletion mutants were constructed and functionally characterized. Mutational analyses by dual-luciferase detected that three regulatory elements, including one enhancer (−1399/−1081) and two silencers (−1080/−801, −500/−201) in the first intron. The sequence located at −1399/−1081 was determined to significantly affect promoter activity. Additionally, the first exon (−1489/−1400) could also remarkably promote the β-actin promoter activity. In the following transduction application, we removed the two silencers and generated a compact reconstruct promoter/enhancer (Poβ-actinΔ−1080/−801Δ−500/−201), which exhibited relatively stronger promoter activity compared with Poβ-actin. Furthermore, the green fluorescent protein (GFP) transgenic stable flounder cell line was obtained by the reconstructed Poβ-actinΔ−1080/−801Δ−500/−201 promoter. Our study provided the potential application of Japanese flounder β-actin, particularly Poβ-actinΔ−1080/−801Δ−500/−201, in ectopic gene expression in the future.
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Park IS, Gil HW, Lee TH, Nam YK, Kim DS. Comparative Study of Growth and Gonad Maturation in Diploid and Triploid Marine Medaka, Oryzias dancena. Dev Reprod 2016; 20:305-314. [PMID: 28144636 PMCID: PMC5270606 DOI: 10.12717/dr.2016.20.4.305] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 11/19/2016] [Accepted: 12/12/2016] [Indexed: 01/18/2023]
Abstract
The marine medaka, Oryzias dancena is a suitable sample as a laboratory animal
because it has a small size and clearly distinguishes between female and male. Data on the growth
and maturity of the diploid and triploid sea cucurbit species suitable for laboratory animals are
very useful for studying other species. Triploidy was induced in the marine medaka by cold shock
treatment (0°C) of fertilized eggs for 45 min, applied two minutes after fertilization. The diploid
and triploid male fish were larger than their female counterparts
(P<0.05), and the concentrations of thyroid stimulating
hormone (TSH) and thyroxine (T4) were higher in the induced triploids over 1 year
(P<0.05). In both the diploid and tri-ploid groups the
concentrations of TSH and T4 were higher in the male fish than in the females
(P<0.05), while the testo-sterone and estradiol-17ß
concentrations in the induced triploids were lower than in the diploids
(P<0.05). The gonadosomatic index (GSI) of the triploid
fish was lower than that for the diploids, and the GSI for females in each ploidy group were higher
than that for the males. For both groups the GSI was highest at 4 months of age, and decreased
thereafter to 12 months. Analysis of the gonads of one-year-old triploid fish suggested that the
induction of triploidy probably causes sterility in this species; this effect was more apparent in
females than in males.
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Affiliation(s)
- In-Seok Park
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime and Ocean University, Busan 49112, Korea
| | - Hyun Woo Gil
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime and Ocean University, Busan 49112, Korea
| | - Tae Ho Lee
- Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime and Ocean University, Busan 49112, Korea
| | - Yoon Kwon Nam
- Institute of Marine Living Modified Organism (iMLMO), Pukyung National University, Busan 48513, Korea
| | - Dong Soo Kim
- Institute of Marine Living Modified Organism (iMLMO), Pukyung National University, Busan 48513, Korea
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Goo IB, Im JH, Gil HW, Lim SG, Park IS. Comparison of Cell and Nuclear Size Difference between Diploid and Induced Triploid in Marine Medaka, Oryzias dancena. Dev Reprod 2016; 19:127-34. [PMID: 27004269 PMCID: PMC4801045 DOI: 10.12717/dr.2015.19.3.127] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The influence of triploidization on cell and nucleus size characteristics of the same tissues of erythrocyte, retina, kidney, hepatocyte and midgut epithelium in marine medaka, Oryzias dancena has been determined histologically. Induced triploid fish are produced by cold shock treatments. Likewise, the size of horizontal cell nucleus in inner nuclear layer of retina, ganglion cell nucleus in ganglion cell layer of retina, proximal tubule cell of kidney, hepatocytes and nuclear height of midgut epithelium all appear to be significantly larger than diploid (p<0.05). On the other hand, retina thickness is larger in diploid than induced triploid (p<0.05). Induced triploid shows low density of cell number. Results of this study suggest that same characteristics in the induced triploid exhibiting larger cells and nucleus sizes with fewer number of cells than the diploid can be useful criteria for the distinction between diploid and induced triploid, and also the ploidy level in marine medaka.
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Affiliation(s)
- In Bon Goo
- Inland Aquaculture Research Center, National Fisheries Research & Development Institute, Jinhae 645-758, Korea
| | - Jae Hyun Im
- Inland Aquaculture Research Center, National Fisheries Research & Development Institute, Jinhae 645-758, Korea
| | - Hyun Woo Gil
- Dept. of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime and Ocean University, Busan 606-791, Korea
| | - Sang Gu Lim
- Future Aquaculture Research Center, National Fisheries Research & Development Institute, Jeju 690-192, Korea
| | - In-Seok Park
- Dept. of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime and Ocean University, Busan 606-791, Korea
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Kim BM, Kim J, Choi IY, Raisuddin S, Au DWT, Leung KMY, Wu RSS, Rhee JS, Lee JS. Omics of the marine medaka (Oryzias melastigma) and its relevance to marine environmental research. MARINE ENVIRONMENTAL RESEARCH 2016; 113:141-152. [PMID: 26716363 DOI: 10.1016/j.marenvres.2015.12.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 12/11/2015] [Accepted: 12/12/2015] [Indexed: 06/05/2023]
Abstract
In recent years, the marine medaka (Oryzias melastigma), also known as the Indian medaka or brackish medaka, has been recognized as a model fish species for ecotoxicology and environmental research in the Asian region. O. melastigma has several promising features for research, which include a short generation period (3-4 months), daily spawning, small size (3-4 cm), transparent embryos, sexual dimorphism, and ease of mass culture in the laboratory. There have been extensive transcriptome and genome studies on the marine medaka in the past decade. Such omics data can be useful in understanding the signal transduction pathways of small teleosts in response to environmental stressors. An omics-integrated approach in the study of the marine medaka is important for strengthening its role as a small fish model for marine environmental studies. In this review, we present current omics information about the marine medaka and discuss its potential applications in the study of various molecular pathways that can be targets of marine environmental stressors, such as chemical pollutants. We believe that this review will encourage the use of this small fish as a model species in marine environmental research.
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Affiliation(s)
- Bo-Mi Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Jaebum Kim
- Department of Animal Biotechnology, College of Animal Bioscience & Technology, Konkuk University, Seoul, 05029, South Korea
| | - Ik-Young Choi
- National Instrumentation Center for Environmental Management, College of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Sheikh Raisuddin
- Department of Medical Elementology & Toxicology, Hamdard University, 110062, New Delhi, India
| | - Doris W T Au
- State Key Laboratory on Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Kenneth M Y Leung
- School of Biological Sciences, University of Hong Kong, Hong Kong, China
| | - Rudolf S S Wu
- School of Biological Sciences, University of Hong Kong, Hong Kong, China
| | - Jae-Sung Rhee
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon, 22012, South Korea.
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea.
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Lee D, Ryu JH, Lee ST, Nam YK, Kim DS, Gong SP. Identification of embryonic stem cell activities in an embryonic cell line derived from marine medaka (Oryzias dancena). FISH PHYSIOLOGY AND BIOCHEMISTRY 2015; 41:1569-1576. [PMID: 26239820 DOI: 10.1007/s10695-015-0108-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 07/28/2015] [Indexed: 06/04/2023]
Abstract
This study was conducted to identify embryonic stem cell (ESC) activities of a long-term cultured embryonic cell line previously derived from blastula-stage Oryzias dancena embryos. Five sub-cell lines were established from the embryonic cell line via clonal expansion of single cells. ESC activities, including clonogenicity, alkaline phosphatase (AP) activity, and differentiation capacity, were examined in the five sub-cell lines. We observed both clonogenicity and AP activity in all five sub-cell lines, but the proportion of cells that exhibited both properties was significantly different among them. Even though we detected different formation rates and sizes of embryoid body (EB) among these cells, all lines were stably able to form EBs and further induction for differentiation showed their capability to differentiate into other cell types in a spontaneous manner. From this study, we determined that the embryonic cell lines examined possessed heterogeneous ESC activities and can be utilized as a marine model system for fish ESC-based research.
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Affiliation(s)
- Dongwook Lee
- Department of Fisheries Biology, Pukyong National University, Busan, 608-737, Korea
| | - Jun Hyung Ryu
- Department of Fisheries Biology, Pukyong National University, Busan, 608-737, Korea
| | - Seung Tae Lee
- Department of Animal Life Science, Kangwon National University, Chuncheon, 200-701, Korea
| | - Yoon Kwon Nam
- Department of Fisheries Biology, Pukyong National University, Busan, 608-737, Korea
- Department of Marine Biomaterials and Aquaculture, Pukyong National University, Busan, 608-737, Korea
| | - Dong Soo Kim
- Department of Fisheries Biology, Pukyong National University, Busan, 608-737, Korea
- Department of Marine Biomaterials and Aquaculture, Pukyong National University, Busan, 608-737, Korea
| | - Seung Pyo Gong
- Department of Fisheries Biology, Pukyong National University, Busan, 608-737, Korea.
- Department of Marine Biomaterials and Aquaculture, Pukyong National University, Busan, 608-737, Korea.
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Shi Y, Soderlund M, Xiang J, Lu Y. Function and regulation domains of a newly isolated putative β-actin promoter from pacific white shrimp. PLoS One 2015; 10:e0122262. [PMID: 25835297 PMCID: PMC4383542 DOI: 10.1371/journal.pone.0122262] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 02/12/2015] [Indexed: 11/18/2022] Open
Abstract
Current development of transgenic shrimp research has been hampered due to the lack of the suitable promoters and efficient transfection methods for crustaceans. A 1642 bp sequence, containing 5'-upstream sequence, exon 1, intron 1 and partial exon 2, which is responsible for transcriptional initiation of the newly reported shrimp β-actin (actinT1), has been isolated from the Pacific white shrimp (Litopenaeus vannamei) and named as SbaP. To determine its function and potential application in marine biotechnology, the sequence and functional domains were examined by constitutive expression of the luciferase reporter gene. We have identified 5' regions that play a central role in the expression of the β-actin gene. The proximal promoter (-1642/-1325) contains two highly conserved transcriptional sites, CCAAT box and CArG motif. Two negative (-1140/-924, -222/-21) and one positive (-810/-425) regulatory elements have been identified in intron1. Transient transfection assay with a construct containing proximal promoter and enhancer (SbaPΔ-222/+1Δ-1325/-924) regions of the shrimp β-actin coupled with luciferase and EGFP (enhanced green fluorescent protein) showed that the promoter was not only functional in sf21 cells, but promoter activity was more than 8-fold higher than a viral-origin promoter (ie1, white spot syndrome virus immediate early gene promoter). Furthermore, SbaPΔ-222/+1Δ-1325/-924 drove a successful expression of luciferase injection assay in vivo injection and also showed higher promoter activity than the ie1 promoter, suggesting that the expression vectors constructed with SbaPΔ-222/+1Δ-1325/-924 have important potential in gene transfer studies for shrimp and other crustacean species.
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Affiliation(s)
- Yingli Shi
- Department of Public Health Sciences, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Marcus Soderlund
- Department of Public Health Sciences, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
| | - Jianhai Xiang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, China
| | - Yuanan Lu
- Department of Public Health Sciences, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America
- * E-mail:
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Genomic cloning and promoter analysis of the β-actin gene from Korean rose bitterling (Rhodeus uyekii). Genes Genomics 2014. [DOI: 10.1007/s13258-014-0221-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Isolation and mRNA expression analysis of aquaporin isoforms in marine medaka Oryzias dancena, a euryhaline teleost. Comp Biochem Physiol A Mol Integr Physiol 2014; 171:1-8. [PMID: 24480540 DOI: 10.1016/j.cbpa.2014.01.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 01/22/2014] [Accepted: 01/23/2014] [Indexed: 12/24/2022]
Abstract
We have identified six putative aquaporin (AQP) genes from marine medaka Oryzias dancena (named odAQPs 1, 3, 8, 10, 11 and 12). The marine medaka AQP cDNAs encode polypeptides of 259-298 amino acids, respectively. Topology predictions showed six transmembrane domains, five connecting loops, and cytoplasmic N- and C-terminal domains, all of which is conserved among AQP molecules. Although asparagine-proline-alanine (NPA) motifs are highly conserved in most odAQP isoforms, several AQPs revealed variant types of motifs such as asparagine-proline-proline (NPP), asparagine-proline-valine (NPV) or/and asparagine-proline-serine (NPS) motifs. The phylogenic analysis showed that marine medaka AQPs had closet relationship with Japanese ricefish (medaka; Oryzias latipes) counterparts. Reverse transcription (RT)-PCR analyses showed that marine medaka AQP transcripts would be expressed in not only osmoregulatory tissues but also nonosmoregulatory tissues, and also that the expression levels of certain AQP isoforms in nonosmoregulatory tissues were readily comparable or even higher than those in typically known osmoregulatory organs. Although the overall tissue distribution patterns of AQPs were not significantly different between 0- and 30-ppt acclimated fish, the expression levels under different salinities were largely variable among isoforms and tissues. This is the first report to investigate tissue expression profiles of teleostean AQPs 11 and 12 during the long-term acclimation to freshwater and salted water.
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Jin YX, Jeon Y, Lee SH, Kwon MS, Kim T, Cui XS, Hyun SH, Kim NH. Production of pigs expressing a transgene under the control of a tetracycline-inducible system. PLoS One 2014; 9:e86146. [PMID: 24454957 PMCID: PMC3893280 DOI: 10.1371/journal.pone.0086146] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 12/06/2013] [Indexed: 11/21/2022] Open
Abstract
Pigs are anatomically and physiologically closer to humans than other laboratory animals. Transgenic (TG) pigs are widely used as models of human diseases. The aim of this study was to produce pigs expressing a tetracycline (Tet)-inducible transgene. The Tet-on system was first tested in infected donor cells. Porcine fetal fibroblasts were infected with a universal doxycycline-inducible vector containing the target gene enhanced green fluorescent protein (eGFP). At 1 day after treatment with 1 µg/ml doxycycline, the fluorescence intensity of these cells was increased. Somatic cell nuclear transfer (SCNT) was then performed using these donor cells. The Tet-on system was then tested in the generated porcine SCNT-TG embryos. Of 4,951 porcine SCNT-TG embryos generated, 850 were cultured in the presence of 1 µg/ml doxycycline in vitro. All of these embryos expressed eGFP and 15 embryos developed to blastocyst stage. The remaining 4,101 embryos were transferred to thirty three surrogate pigs from which thirty eight cloned TG piglets were obtained. PCR analysis showed that the transgene was inserted into the genome of each of these piglets. Two TG fibroblast cell lines were established from these TG piglets, and these cells were used as donor cells for re-cloning. The re-cloned SCNT embryos expressed the eGFP transgene under the control of doxycycline. These data show that the expression of transgenes in cloned TG pigs can be regulated by the Tet-on/off systems.
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Affiliation(s)
- Yong-Xun Jin
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Yubyeol Jeon
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Sung-Hyun Lee
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Mo-Sun Kwon
- School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
| | - Teoan Kim
- School of Medicine, Catholic University of Daegu, Daegu, Republic of Korea
| | - Xiang-Shun Cui
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
- * E-mail: (NHK); (SHH)
| | - Nam-Hyung Kim
- Department of Animal Science, Chungbuk National University, Cheongju, Republic of Korea
- * E-mail: (NHK); (SHH)
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Cho YS, Lee SY, Kim DS, Nam YK. Characterization of stable fluorescent transgenic marine medaka (Oryzias dancena) lines carrying red fluorescent protein gene driven by myosin light chain 2 promoter. Transgenic Res 2013; 22:849-59. [PMID: 23188170 DOI: 10.1007/s11248-012-9675-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 11/14/2012] [Indexed: 01/09/2023]
Abstract
Stable transgenic germlines carrying the red fluorescence protein (RFP) gene (rfp) driven by fast skeletal myosin light chain-2 gene (mlc2f) promoter were established in a truly euryhaline fish species, the marine medaka (Oryzias dancena; Beloniformes). Transgenic lines contained transgene copy numbers varying from a single copy to more than 230 copies per genome. Although the transgenic founders displayed mosaic and/or ectopic expression of the RFP signal, the resultant F1 transgenics and their progeny showed consistently stable transmission of the transgenic locus and uniform RFP signal through several subsequent generations. In adult transgenics, an authentic brilliant red fluorescence was achieved over the skeletal muscles of the transgenic individuals, which might be sufficient for ornamental display. Expression analysis of the transgenic mRNAs indicated that rfp transcripts were predominantly expressed in the skeletal muscles. Different transgenic lines displayed different levels of transgene expression at the mRNA, protein, and phenotypic levels. However, the efficiency of transgene expression was independent of the transgene copy number. The RFP protein levels were consistently stable in the transgenic fish muscles through several generations, up to F5. The results of this study suggest that transgenic marine medaka that acquire strong fluorescent signals in their skeletal muscles can be developed as a promising, novel ornamental fish for display in both freshwater and seawater aquaria.
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Affiliation(s)
- Young Sun Cho
- Institute of Marine Living Modified Organisms, Pukyong National University, Busan 608-737, Korea
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Lee SY, Kim DS, Nam YK. Molecular characterization of fast skeletal muscle-specific myosin light chain 2 gene (mlc2f) in marine medaka Oryzias dancena. Genes Genomics 2013. [DOI: 10.1007/s13258-013-0071-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cho YS, Kim DS, Nam YK. Characterization of estrogen-responsive transgenic marine medaka Oryzias dancena germlines harboring red fluorescent protein gene under the control by endogenous choriogenin H promoter. Transgenic Res 2013; 22:501-17. [PMID: 22972478 DOI: 10.1007/s11248-012-9650-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 08/30/2012] [Indexed: 10/27/2022]
Abstract
Transgenic marine medaka (Oryzias dancena) germlines were generated by the microinjection of the red fluorescent protein (RFP) reporter gene (rfp) driven by the endogenous choriogenin H gene (chgH) promoter. The selected transgenic lines contained multiple copies of the transgene (3-42 copies per cell) in their genomes. Although all the founders were mosaic, the transgene was stably transmitted from the F1 generation to all subsequent generations following a Mendelian pattern. Different transgenic lines showed different responsiveness to estradiol-17β (E2) exposure at the mRNA and protein levels, and the expression efficiency was dependent upon the transgene copy number. The induction of RFP was significantly affected by the developmental stage of transgenic larvae: later-stage larvae (older than 7 days post-hatching) showed higher sensitivity to E2 exposure than earlier-stage larvae. The response of transgenic expression to E2 was fairly dependent upon the E2 dose (200-3,200 ng/L) and exposure period (1-7 days), according to both a microscopic examination of RFP intensity and a qRT-PCR assay. The transgenic marine medaka showed similar transgenic responses to E2 under freshwater, brackish, and seawater conditions. In addition to E2, the transgenic RFP signal was also successfully induced during 1-week exposure to various other natural (1 μg/L estrone and 10 μg/L estriol) and synthetic (xeno)estrogens (0.1 μg/L 17α-ethynylestradiol, 1 μg/L diethylstilbestrol, and 10 mg/L bisphenol A). The efficiency of transgene expression varied greatly among the chemicals tested. The results of this study suggest that the chgH-rfp transgenic marine medaka species will be useful in the in vivo detection of waterborne estrogens under a wide range of salinity conditions.
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Affiliation(s)
- Young Sun Cho
- Institute of Marine Living Modified Organisms, Pukyong National University, Busan 608-737, South Korea
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Yoshinari N, Ando K, Kudo A, Kinoshita M, Kawakami A. Colored medaka and zebrafish: transgenics with ubiquitous and strong transgene expression driven by the medaka β-actin promoter. Dev Growth Differ 2012; 54:818-28. [PMID: 23157381 DOI: 10.1111/dgd.12013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Revised: 09/28/2012] [Accepted: 09/30/2012] [Indexed: 11/29/2022]
Abstract
Conditional cell labeling, cell tracing, and genetic manipulation approaches are becoming increasingly important in developmental and regenerative biology. Such approaches in zebrafish research are hampered by the lack of an ubiquitous transgene driver element that is active at all developmental stages. Here, we report the isolation and characterization of the medaka fish (Oryzias latipes) β-actin (Olactb) promoter, which drives constitutive transgene expression during all developmental stages, and the analysis of adult organs except blood cell types. Taking advantage of the compact medaka promoter, we succeeded in generating a zebrafish transgenic (Tg) line with unprecedentedly strong and widespread transgene expression from embryonic to adult stages. Moreover, the Tg carries a pair of loxP sites, which enables the reporter fluorophore to switch from DsRed2 to enhanced green fluorescent protein (EGFP). We induced Cre/loxP recombination with Tg(hsp70l: mCherry-t2a-Cre(ERt2) ) in the double Tg embryo and generated a Tg line that constitutively expresses EGFP. We further demonstrate the powerful application of Olactb-driven Tgs for cell lineage tracing using transplantation experiments with embryonic cells at the shield stage and adult cells of regenerating fin. Thus, the use of promoter elements from medaka is an alternative approach to generate Tgs with stronger and even novel expression patterns in zebrafish. The Olactb promoter and the Tg lines presented here represent an important advancement for the broader use of Cre/loxP-based Tg applications in zebrafish.
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Affiliation(s)
- Nozomi Yoshinari
- Department of Biological Information, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8501, Japan
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Hartmann N, Englert C. A microinjection protocol for the generation of transgenic killifish (Species: Nothobranchius furzeri). Dev Dyn 2012; 241:1133-41. [DOI: 10.1002/dvdy.23789] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2012] [Indexed: 01/10/2023] Open
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