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Setti PG, Borra RC, Sassi FDMC, Cioffi MDB, Fukushima HCS. Zebrafish ( Danio rerio) Gynogenetic Production by Heat Shock: Comparison Between Mitotic and Meiotic Treatment. Zebrafish 2023; 20:181-188. [PMID: 37527193 DOI: 10.1089/zeb.2023.0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023] Open
Abstract
Inbred species are useful resources for a variety of biomedical research applications. To create isogenic zebrafish, it is feasible to stop meiosis II (repeatedly) or mitosis (two times) in a haploid embryo by applying pressure or by delivering a heat shock, respectively. In this study, to improve the repeatability, we suggest a less complicated approach based on sperm ultraviolet-C (UV-C) exposure for a shorter period followed by heat shock at various temperatures, eliminating the use of pressure in meiotic therapy since heat shock is more accessible to laboratories. In this study, the survivability rates of meiotic (Mei) and mitotic (Mit) gynogenesis offspring produced by various combinations of irradiation (28.5, 105, and 210 mJ/cm2) and temperature (Mei: 40.40°C, 40.60°C, or 40.90°C; Mt: 41.40°C, 41.90°C, or 42.45°C) were compared with diploid (C) and haploid (H) controls. Our findings demonstrated that 40.60°C and 41.90°C were the most suitable temperatures to produce meiotic and mitotic gynogenesis, respectively, whereas 28.5 mJ/cm2 was more successful in ensuring haploid embryos. As a result, we deduced that meiotic gynogenesis produces more viable offspring than the mitotic approach and requires a lower temperature to maintain the second polar body.
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Affiliation(s)
- Príncia Grejo Setti
- Department of Genetic and Evolution, Federal University of São Carlos, São Carlos, Brazil
| | - Ricardo Carneiro Borra
- Department of Genetic and Evolution, Federal University of São Carlos, São Carlos, Brazil
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2
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Shimizu N, Shiraishi H, Hanada T. Zebrafish as a Useful Model System for Human Liver Disease. Cells 2023; 12:2246. [PMID: 37759472 PMCID: PMC10526867 DOI: 10.3390/cells12182246] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/31/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Liver diseases represent a significant global health challenge, thereby necessitating extensive research to understand their intricate complexities and to develop effective treatments. In this context, zebrafish (Danio rerio) have emerged as a valuable model organism for studying various aspects of liver disease. The zebrafish liver has striking similarities to the human liver in terms of structure, function, and regenerative capacity. Researchers have successfully induced liver damage in zebrafish using chemical toxins, genetic manipulation, and other methods, thereby allowing the study of disease mechanisms and the progression of liver disease. Zebrafish embryos or larvae, with their transparency and rapid development, provide a unique opportunity for high-throughput drug screening and the identification of potential therapeutics. This review highlights how research on zebrafish has provided valuable insights into the pathological mechanisms of human liver disease.
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Affiliation(s)
- Nobuyuki Shimizu
- Department of Cell Biology, Oita University Faculty of Medicine, Yufu 879-5593, Oita, Japan;
| | | | - Toshikatsu Hanada
- Department of Cell Biology, Oita University Faculty of Medicine, Yufu 879-5593, Oita, Japan;
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3
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McConnell SC, Hernandez KM, Andrade J, de Jong JLO. Immune gene variation associated with chromosome-scale differences among individual zebrafish genomes. Sci Rep 2023; 13:7777. [PMID: 37179373 PMCID: PMC10183018 DOI: 10.1038/s41598-023-34467-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/30/2023] [Indexed: 05/15/2023] Open
Abstract
Immune genes have evolved to maintain exceptional diversity, offering robust defense against pathogens. We performed genomic assembly to examine immune gene variation in zebrafish. Gene pathway analysis identified immune genes as significantly enriched among genes with evidence of positive selection. A large subset of genes was absent from analysis of coding sequences due to apparent lack of reads, prompting us to examine genes overlapping zero coverage regions (ZCRs), defined as 2 kb stretches without mapped reads. Immune genes were identified as highly enriched within ZCRs, including over 60% of major histocompatibility complex (MHC) genes and NOD-like receptor (NLR) genes, mediators of direct and indirect pathogen recognition. This variation was most highly concentrated throughout one arm of chromosome 4 carrying a large cluster of NLR genes, associated with large-scale structural variation covering more than half of the chromosome. Our genomic assemblies uncovered alternative haplotypes and distinct complements of immune genes among individual zebrafish, including the MHC Class II locus on chromosome 8 and the NLR gene cluster on chromosome 4. While previous studies have shown marked variation in NLR genes between vertebrate species, our study highlights extensive variation in NLR gene regions between individuals of the same species. Taken together, these findings provide evidence of immune gene variation on a scale previously unknown in other vertebrate species and raise questions about potential impact on immune function.
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Affiliation(s)
- Sean C McConnell
- Section of Hematology-Oncology and Stem Cell Transplant, Department of Pediatrics, The University of Chicago, Chicago, IL, 60637, USA
| | - Kyle M Hernandez
- Center for Research Informatics, The University of Chicago, Chicago, IL, 60637, USA
- Department of Medicine, Computational Biomedicine and Biomedical Data Science, Center for Translational Data Science, The University of Chicago, Chicago, IL, 60637, USA
| | - Jorge Andrade
- Center for Research Informatics, The University of Chicago, Chicago, IL, 60637, USA
- Kite Pharma, Santa Monica, CA, 90404, USA
| | - Jill L O de Jong
- Section of Hematology-Oncology and Stem Cell Transplant, Department of Pediatrics, The University of Chicago, Chicago, IL, 60637, USA.
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4
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Pezzotta A, Brioschi L, Carbone S, Mazzoleni B, Bontempi V, Monastra F, Mauri L, Marozzi A, Mione M, Pistocchi A, Viani P. Combined Inhibition of Hedgehog and HDAC6: In Vitro and In Vivo Studies Reveal a New Role for Lysosomal Stress in Reducing Glioblastoma Cell Viability. Int J Mol Sci 2023; 24:ijms24065771. [PMID: 36982845 PMCID: PMC10051748 DOI: 10.3390/ijms24065771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/03/2023] [Accepted: 03/07/2023] [Indexed: 03/22/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most common and malignant brain tumor in adults. The invasiveness and the rapid progression that characterize GBM negatively impact patients’ survival. Temozolomide (TMZ) is currently considered the first-choice chemotherapeutic agent. Unfortunately, over 50% of patients with GBM do not respond to TMZ treatment, and the mutation-prone nature of GBM enables the development of resistance mechanisms. Therefore, efforts have been devoted to the dissection of aberrant pathways involved in GBM insurgence and resistance in order to identify new therapeutic targets. Among them, sphingolipid signaling, Hedgehog (Hh) pathway, and the histone deacetylase 6 (HDAC6) activity are frequently dysregulated and may represent key targets to counteract GBM progression. Given the positive correlation between Hh/HDAC6/sphingolipid metabolism in GBM, we decided to perform a dual pharmacological inhibition of Hh and HDAC6 through cyclopamine and tubastatin A, respectively, in a human GMB cell line and zebrafish embryos. The combined administration of these compounds elicited a more significant reduction of GMB cell viability than did single treatments in vitro and in cells orthotopically transplanted in the zebrafish hindbrain ventricle. We demonstrated, for the first time, that the inhibition of these pathways induces lysosomal stress which results in an impaired fusion of lysosomes with autophagosomes and a block of sphingolipid degradation in GBM cell lines. This condition, which we also recapitulated in zebrafish embryos, suggests an impairment of lysosome-dependent processes involving autophagy and sphingolipid homeostasis and might be instrumental in the reduction of GBM progression.
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Affiliation(s)
- Alex Pezzotta
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
| | - Loredana Brioschi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
| | - Sabrina Carbone
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
| | - Beatrice Mazzoleni
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
- Molecular Mechanisms Unit, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Via Giacomo Venezian, 1, 20133 Milano, Italy
| | - Vittorio Bontempi
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Federica Monastra
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
| | - Laura Mauri
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
| | - Anna Marozzi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
| | - Marina Mione
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Anna Pistocchi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
- Correspondence: (A.P.); (P.V.)
| | - Paola Viani
- Department of Medical Biotechnology and Translational Medicine, University of Milan, L.I.T.A., Via Fratelli Cervi 93, Segrate, 20054 Milano, Italy
- Correspondence: (A.P.); (P.V.)
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5
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Zhong X, Bao X, Zhong H, Zhou Y, Zhang Z, Lu Y, Dai Q, Yang Q, Ke P, Xia Y, Wu L, Sui Z, Lu Y, Han M, Xu W, Gao J. Mitochondrial targeted drug delivery combined with manganese catalyzed Fenton reaction for the treatment of breast cancer. Int J Pharm 2022; 622:121810. [PMID: 35580685 DOI: 10.1016/j.ijpharm.2022.121810] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/18/2022] [Accepted: 05/05/2022] [Indexed: 02/07/2023]
Abstract
In previous studies, we found that triphenylphosphine-modified doxorubicin (TPP-DOX) can effectively kill drug-resistant tumor cells, but its effect on sensitive tumor cells is weakened. In this research, with albumin from Bovine Serum (BSA) as a carrier, TPP-DOX@MnBSA (TD@MB) nanoparticles were prepared by co-loading TPP-DOX and manganese which can realize the combination of chemotherapy and chemodynamic therapy (CDT). The uniform and stable nano-spherical nanoparticle can promote drug uptake, achieve mitochondrial-targeted drug delivery, increase intracellular reactive oxygen species (ROS) and catalyze the production of highly toxic oxidative hydroxyl radicals (OH·), further inhibiting the growth of both sensitive and drug-resistant MCF-7 cells. Besides, TD@MB can down-regulate the stemness-related proteins and the metastasis-related proteins, potentially decreasing the tumor stemness and metastasis. In vivo experiment indicated that TD@MB was able to exert desired antitumor effect, good tumor targeting and biocompatibility.
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Affiliation(s)
- Xincheng Zhong
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Xiaoyan Bao
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Haiqing Zhong
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Yi Zhou
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Zhentao Zhang
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Yiying Lu
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Qi Dai
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Qiyao Yang
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Peng Ke
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Yiyi Xia
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Linjie Wu
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Zaiyun Sui
- Shandong Academy of Chinese Medicine, Jinan 250000, PR China
| | - Yan Lu
- Department of Pharmacy, the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, PR China
| | - Min Han
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou 310058, PR China.
| | - WenHong Xu
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310058, PR China.
| | - Jianqing Gao
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, PR China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou 310058, PR China.
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6
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Lewandowski V, Sary C, Casetta J, De Souza FP, De Castro PL, Goes ESDR, De Oliveira CAL, Ribeiro RP, Vargas L. GENETIC VARIABILITY AND REPRODUCTIVE CHARACTERISTICS OF ZEBRAFISH (Cyprinidae Danio rerio) STOCKS. ACTA BIOLÓGICA COLOMBIANA 2021. [DOI: 10.15446/abc.v27n2.87739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Specimens of cultured zebrafish acquired from different fish farms in Brazil may show genetic variability and alteration in allele frequency due to genetic drift and selective pressure in a captive environment, resulting in the differentiation of productive and reproductive characteristics. The aim of this study was to evaluate the genetic variability and reproductive characteristics of 180 zebrafish specimens from six Brazilian fish farms. A deviation from the Hardy-Weinberg equilibrium was observed in all evaluated stocks. Differentiation among stocks was observed in the amount of genetic variability with respect to observed heterozygosity and the inbreeding coefficient (FIS). Genetic distance between stocks was determined through the Fst index, and the formation of four distinct groups was observed by plotting the dendrogram based on Nei’s genetic distance. Differences were observed among reproductive parameters, such as the average number of eggs per female and hatchability. This second parameter proved to be related to the level of inbreeding of the population, whereas this effect was not observed for spawning frequency. We conclude that zebrafish stocks from the 6 different Brazilian fish farms present significant genetic and phenotypic variability. The genetic structure affects fecundity and should be considered when carrying out work where reproductive rates are evaluated.
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7
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Lee AQ, Li Y, Gong Z. Inducible Liver Cancer Models in Transgenic Zebrafish to Investigate Cancer Biology. Cancers (Basel) 2021; 13:5148. [PMID: 34680297 PMCID: PMC8533791 DOI: 10.3390/cancers13205148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/08/2021] [Accepted: 10/09/2021] [Indexed: 12/20/2022] Open
Abstract
Primary liver cancer is one of the most prevalent and deadly cancers, which incidence continues to increase while treatment response remains poor; thus, in-depth understanding of tumour events is necessary to develop more effective therapies. Animal models for liver cancer are powerful tools to reach this goal. Over the past decade, our laboratory has established multiple oncogene transgenic zebrafish lines that can be robustly induced to develop liver cancer. Histological, transcriptomic and molecular analyses validate the use of these transgenic zebrafish as experimental models for liver cancer. In this review, we provide a comprehensive summary of our findings with these inducible zebrafish liver cancer models in tumour initiation, oncogene addiction, tumour microenvironment, gender disparity, cancer cachexia, drug screening and others. Induced oncogene expression causes a rapid change of the tumour microenvironment such as inflammatory responses, increased vascularisation and rapid hepatic growth. In several models, histologically-proven carcinoma can be induced within one week of chemical inducer administration. Interestingly, the induced liver tumours show the ability to regress when the transgenic oncogene is suppressed by the withdrawal of the chemical inducer. Like human liver cancer, there is a strong bias of liver cancer severity in male zebrafish. After long-term tumour progression, liver cancer-bearing zebrafish also show symptoms of cancer cachexia such as muscle-wasting. In addition, the zebrafish models have been used to screen for anti-metastasis drugs as well as to evaluate environmental toxicants in carcinogenesis. These findings demonstrated that these inducible zebrafish liver cancer models provide rapid and convenient experimental tools for further investigation of fundamental cancer biology, with the potential for the discovery of new therapeutic approaches.
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Affiliation(s)
| | | | - Zhiyuan Gong
- Department of Biological Sciences, National University of Singapore, Singapore 119077, Singapore; (A.Q.L.); (Y.L.)
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8
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A fish is not a mouse: understanding differences in background genetics is critical for reproducibility. Lab Anim (NY) 2020; 50:19-25. [PMID: 33268901 DOI: 10.1038/s41684-020-00683-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/23/2020] [Indexed: 02/06/2023]
Abstract
Poorly controlled background genetics in animal models contributes to the lack of reproducibility that is increasingly recognized in biomedical research. The laboratory zebrafish, Danio rerio, has been an important model organism for decades in many research areas, yet inbred strains and traditionally managed outbred stocks are not available for this species. Sometimes incorrectly referred to as 'inbred strains' or 'strains', zebrafish wild-type lines possess background genetics that are often not well characterized, and breeding practices for these lines have not been consistent over time or among institutions. In this Perspective, we trace key milestones in the history of one of the most widely used genetic backgrounds, the AB line, to illustrate the dynamic complexity within an example background that is largely invisible when reading the scientific literature. Failure to adequately control for genetic background compromises the validity of experimental outcomes. We therefore propose that authors provide as much specific detail about the origin and genetic makeup of zebrafish lines as is reasonable and possible, and that the terms used to describe background genetics be applied in a way that is consistent with other fish and mammalian model organisms. We strongly encourage the adoption of genetic monitoring for the characterization of existing zebrafish lines, to help detect genetic contamination in breeding colonies and to verify the level of genetic heterogeneity in breeding colonies over time. Careful attention to background genetics will improve transparency and reproducibility, therefore improving the utility of the zebrafish as a model organism.
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9
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Abstract
Metastasis, the dispersal of cancer cells from a primary tumor to secondary sites within the body, is the leading cause of cancer-related death. Animal models have been an indispensable tool to investigate the complex interactions between the cancer cells and the tumor microenvironment during the metastatic cascade. The zebrafish (Danio rerio) has emerged as a powerful vertebrate model for studying metastatic events in vivo. The zebrafish has many attributes including ex-utero development, which facilitates embryonic manipulation, as well as optically transparent tissues, which enables in vivo imaging of fluorescently labeled cells in real time. Here, we summarize the techniques which have been used to study cancer biology and metastasis in the zebrafish model organism, including genetic manipulation and transgenesis, cell transplantation, live imaging, and high-throughput compound screening. Finally, we discuss studies using the zebrafish, which have complemented and benefited metastasis research.
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Affiliation(s)
- Katy R Astell
- The Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh EH16 4SB, United Kingdom
| | - Dirk Sieger
- The Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh EH16 4SB, United Kingdom
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10
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Venta PJ, Nguyen AK, Senut MC, Poulos WG, Prukudom S, Cibelli JB. A 13-plex of tetra- and penta-STRs to identify zebrafish. Sci Rep 2020; 10:3851. [PMID: 32123258 PMCID: PMC7052278 DOI: 10.1038/s41598-020-60842-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 01/09/2020] [Indexed: 11/09/2022] Open
Abstract
The zebrafish species Danio rerio has become one of the major vertebrate model organisms used in biomedical research. However, there are aspects of the model that need to be improved. One of these is the ability to identify individual fish and fish lines by DNA profiling. Although many dinucleotide short tandem repeat (diSTR) markers are available for this and similar purposes, they have certain disadvantages such as an excessive polymerase slippage ("stutter") that causes difficulties in automated genotyping and cross-laboratory comparisons. Here we report on the development of a 13-plex of tetranucleotide and pentanucleotide STRs (tetraSTRs and pentaSTRs, respectively) that have low stutter. The system uses an inexpensive universal primer labelling system, which can easily be converted to a direct labeling system if desired. This 13-plex was examined in three zebrafish lines (NHGRI-1, kca33Tg, and kca66Tg, originally obtained from ZIRC). The average observed heterozygosity (Ho) and expected heterozygosity (He) in these highly inbred lines were 0.291 and 0.359, respectively, which is very similar to what has been found with diSTRs. The probability of identity (PI) for all fish tested was 2.1 × 10-5 and the PI for siblings (PIsib) was 6.4 × 10-3, as calculated by the Genalex package. Ninety percent of the fish tested were correctly identified with their respective strains. It is also demonstrated that this panel can be used to confirm doubled-haploid cell lines. This multiplex should find multiple uses for improving the accuracy and reproducibility of studies using the zebrafish model.
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Affiliation(s)
- Patrick J Venta
- Microbiology & Molecular Genetics, Michigan State University, East Lansing, MI, 48823, USA. .,Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI, 48823, USA.
| | - Anthony K Nguyen
- Microbiology & Molecular Genetics, Michigan State University, East Lansing, MI, 48823, USA
| | - Marie-Claude Senut
- Biomilab LLC, Lansing, MI, 48910, USA.,Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, 48823, USA
| | - William G Poulos
- Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, 48823, USA
| | - Sukumal Prukudom
- Center for Advanced Studies for Agriculture and Food, Kasetsart University Institute for Advanced Studies, Kasetsart University (CASAF, NRU-KU), Bangkok, 10900, Thailand
| | - Jose B Cibelli
- Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, 48823, USA. .,Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI, 48823, USA.
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11
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La transplantation de cellules tumorales chez le poisson zèbre : de la recherche translationnelle à la médecine personnalisée. Bull Cancer 2020; 107:30-40. [DOI: 10.1016/j.bulcan.2019.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 12/24/2022]
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12
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Lewandowski V, Sary C, Casetta J, Seccatto Garcia AL, Lopes de Oliveira CA, Pereira Ribeiro R, Vargas Mendez LD. Zebrafish breeding program: genetic parameters estimates for growth traits. J Appl Genet 2019; 60:209-216. [PMID: 30997663 DOI: 10.1007/s13353-019-00497-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 04/02/2019] [Accepted: 04/08/2019] [Indexed: 11/28/2022]
Abstract
The objective of this study was to evaluate the genetic parameters of two generations of zebrafish breeding program. The base population was formed by crossing individuals of six commercial stocks of zebrafish, resulting in a nucleus with 60 families. Two generations were evaluated, with a total of 780 and 781 individuals for the first and second generation, respectively. The selection was made based on the mean genetic value of each family, followed by mass selection of the breeders. Mathematical models that considered the fixed (age, density in the larval stage, sex, and generation) and random (animal additive genetics, common to full-sibs, and residual) effects were evaluated using BLUPF90 program family. Weight and total length were used as response variables. Total length was the best selection criterion because it had a higher heritability (0.30) than weight (0.22). There was a high common to full-sib effect, especially in the first generation of animals. For second-generation data, the heritability was 0.26 for total length, as well as a lower common to full-sib effect for length. The best model obtained for this evaluation was considering all effects, being age and density as first and second polynomial, respectively. The genetic and phenotypic correlations for weight and length were 0.87 and 0.75, respectively. These results indicate that genetic breeding using total length as the selection criterion may produce a larger and heavier zebrafish strain.
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Affiliation(s)
- Vanessa Lewandowski
- Faculty of Agrarian Sciences, Federal University of Grande Dourados - UFGD, Dourados, Brazil.
| | - Cesar Sary
- Department of Animal Science, State University of Maringá - UEM, Maringá, Brazil
| | - Jaisa Casetta
- Department of Animal Science, State University of Maringá - UEM, Maringá, Brazil
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13
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Avci ME, Keskus AG, Targen S, Isilak ME, Ozturk M, Atalay RC, Adams MM, Konu O. Development of a novel zebrafish xenograft model in ache mutants using liver cancer cell lines. Sci Rep 2018; 8:1570. [PMID: 29371671 PMCID: PMC5785479 DOI: 10.1038/s41598-018-19817-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 01/05/2018] [Indexed: 01/09/2023] Open
Abstract
Acetylcholinesterase (AChE), an enzyme responsible for degradation of acetylcholine, has been identified as a prognostic marker in liver cancer. Although in vivo Ache tumorigenicity assays in mouse are present, no established liver cancer xenograft model in zebrafish using an ache mutant background exists. Herein, we developed an embryonic zebrafish xenograft model using epithelial (Hep3B) and mesenchymal (SKHep1) liver cancer cell lines in wild-type and ache sb55 sibling mutant larvae after characterization of cholinesterase expression and activity in cell lines and zebrafish larvae. The comparison of fluorescent signal reflecting tumor size at 3-days post-injection (dpi) revealed an enhanced tumorigenic potential and a reduced migration capacity in cancer cells injected into homozygous ache sb55 mutants when compared with the wild-type. Increased tumor load was confirmed using an ALU based tumor DNA quantification method modified for use in genotyped xenotransplanted zebrafish embryos. Confocal microscopy using the Huh7 cells stably expressing GFP helped identify the distribution of tumor cells in larvae. Our results imply that acetylcholine accumulation in the microenvironment directly or indirectly supports tumor growth in liver cancer. Use of this model system for drug screening studies holds potential in discovering new cholinergic targets for treatment of liver cancers.
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Affiliation(s)
- M Ender Avci
- Department of Molecular Biology and Genetics, Bilkent University, 06800, Ankara, Turkey.
- Izmir International Biomedicine and Genome Institute (iBG-izmir), Dokuz Eylul University, 35340, Izmir, Turkey.
| | - Ayse Gokce Keskus
- Interdisciplinary Program in Neuroscience, Bilkent University, 06800, Ankara, Turkey
| | - Seniye Targen
- Department of Molecular Biology and Genetics, Bilkent University, 06800, Ankara, Turkey
| | - M Efe Isilak
- Department of Molecular Biology and Genetics, Bilkent University, 06800, Ankara, Turkey
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara, Turkey
| | - Mehmet Ozturk
- Department of Molecular Biology and Genetics, Bilkent University, 06800, Ankara, Turkey
- Izmir International Biomedicine and Genome Institute (iBG-izmir), Dokuz Eylul University, 35340, Izmir, Turkey
| | - Rengul Cetin Atalay
- Medical Informatics Department, Graduate School of Informatics, Middle East Technical University, 06800, Ankara, Turkey
| | - Michelle M Adams
- Department of Psychology, Bilkent University, 06800, Ankara, Turkey
- Interdisciplinary Program in Neuroscience, Bilkent University, 06800, Ankara, Turkey
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara, Turkey
| | - Ozlen Konu
- Department of Molecular Biology and Genetics, Bilkent University, 06800, Ankara, Turkey.
- Interdisciplinary Program in Neuroscience, Bilkent University, 06800, Ankara, Turkey.
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara, Turkey.
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14
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Huang D, Li H, He Q, Yuan W, Chen Z, Yang H. Developmental Toxicity of Diethylnitrosamine in Zebrafish Embryos/Juveniles Related to Excessive Oxidative Stress. WATER, AIR, AND SOIL POLLUTION 2018; 229:81. [PMID: 29503482 PMCID: PMC5823957 DOI: 10.1007/s11270-018-3739-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 02/07/2018] [Indexed: 05/18/2023]
Abstract
Diethylnitrosamine (DEN) is present in food, water, and daily supplies and is regarded as a toxicant of carcinogenicity. The developmental toxicity of DEN has been rarely reported as yet. In this study, zebrafish were exposed to different concentrations of DEN at 6 h post-fertilization (hpf) to access embryonic toxicity of the compound. The results show that DEN resulted in negative effects of hatching rate, heartbeat, body length, and spontaneous movement. Deformities, including notochord malformation, pericardium edema, embryonic membrane turbidity, tail hypoplasia, yolk sac deformity, and growth retardation, happened during exposure period. Moreover, production of reactive oxygen species (ROS) significantly increased after DEN treatment. Then, alterations of the expression level of oxidative stress-related genes were observed in our results. To our knowledge, this is the first study concerning the effect of DEN on zebrafish. And from the information of our research, we speculated that development toxicity of DEN should be related to the excessive oxidative stress.
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Affiliation(s)
- Danping Huang
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Tianhe Road No. 600, Guangzhou, 510000 China
| | - Hanmin Li
- Hubei Provincial Hospital of Traditional Chinese Medicine, Garden Hill No. 4 Wuchang District, Wuhan, 430061 China
- Hubei Province Academy of Traditional Chinese Medicine, No.856 Luoyu Road, Hongshan District, Wuhan, 430074 China
| | - Qidi He
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006 China
| | - Weiqu Yuan
- The fourth Clinical Medical College of Guangzhou University Chinese Med, Shen zhen, 518000 China
| | - Zuanguang Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006 China
| | - Hongzhi Yang
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Tianhe Road No. 600, Guangzhou, 510000 China
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15
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Berrun AC, Stachura DL. Development of an In Vitro Assay to Quantitate Hematopoietic Stem and Progenitor Cells (HSPCs) in Developing Zebrafish Embryos. J Vis Exp 2017:56836. [PMID: 29286381 PMCID: PMC5755513 DOI: 10.3791/56836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Hematopoiesis is an essential cellular process in which hematopoietic stem and progenitor cells (HSPCs) differentiate into the multitude of different cell lineages that comprise mature blood. Isolation and identification of these HSPCs is difficult because they are defined ex post facto; they can only be defined after their differentiation into specific cell lineages. Over the past few decades, the zebrafish (Danio rerio) has become a model organism to study hematopoiesis. Zebrafish embryos develop ex utero, and by 48 h post-fertilization (hpf) have generated definitive HSPCs. Assays to assess HSPC differentiation and proliferation capabilities have been developed, utilizing transplantation and subsequent reconstitution of the hematopoietic system in addition to visualizing specialized transgenic lines with confocal microscopy. However, these assays are cost prohibitive, technically difficult, and time consuming for many laboratories. Development of an in vitro model to assess HSPCs would be cost effective, quicker, and present fewer difficulties compared to previously described methods, allowing laboratories to quickly assess mutagenesis and drug screens that affect HSPC biology. This novel in vitro assay to assess HSPCs is performed by plating dissociated whole zebrafish embryos and adding exogenous factors that promote only HSPC differentiation and proliferation. Embryos are dissociated into single cells and plated with HSPC-supportive colony stimulating factors that cause them to generate colony forming units (CFUs) that arise from a single progenitor cell. These assays should allow more careful examination of the molecular pathways responsible for HSPC proliferation, differentiation, and regulation, which will allow researchers to understand the underpinnings of vertebrate hematopoiesis and its dysregulation during disease.
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Affiliation(s)
- A C Berrun
- Department of Biological Sciences, California State University, Chico
| | - D L Stachura
- Department of Biological Sciences, California State University, Chico;
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16
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Casey MJ, Modzelewska K, Anderson D, Goodman J, Boer EF, Jimenez L, Grossman D, Stewart RA. Transplantation of Zebrafish Pediatric Brain Tumors into Immune-competent Hosts for Long-term Study of Tumor Cell Behavior and Drug Response. J Vis Exp 2017. [PMID: 28570545 PMCID: PMC5607995 DOI: 10.3791/55712] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Tumor cell transplantation is an important technique to define the mechanisms controlling cancer cell growth, migration, and host response, as well as to assess potential patient response to therapy. Current methods largely depend on using syngeneic or immune-compromised animals to avoid rejection of the tumor graft. Such methods require the use of specific genetic strains that often prevent the analysis of immune-tumor cell interactions and/or are limited to specific genetic backgrounds. An alternative method in zebrafish takes advantage of an incompletely developed immune system in the embryonic brain before 3 days, where tumor cells are transplanted for use in short-term assays (i.e., 3 to 10 days). However, these methods cause host lethality, which prevents the long-term study of tumor cell behavior and drug response. This protocol describes a simple and efficient method for the long-term orthotopic transplantation of zebrafish brain tumor tissue into the fourth ventricle of a 2-day-old immune-competent zebrafish. This method allows: 1) long-term study of tumor cell behaviors, such as invasion and dissemination; 2) durable tumor response to drugs; and 3) re-transplantation of tumors for the study of tumor evolution and/or the impact of different host genetic backgrounds. In summary, this technique allows cancer researchers to assess engraftment, invasion, and growth at distant sites, as well as to perform chemical screens and cell competition assays over many months. This protocol can be extended to studies of other tumor types and can be used to elucidate mechanisms of chemoresistance and metastasis.
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Affiliation(s)
- Mattie J Casey
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine
| | - Katarzyna Modzelewska
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine
| | - Daniela Anderson
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine
| | - James Goodman
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine
| | - Elena F Boer
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine
| | - Laura Jimenez
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine
| | - Douglas Grossman
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine; Department of Dermatology, University of Utah Health Sciences Center, Salt Lake City
| | - Rodney A Stewart
- Department of Oncological Sciences and Huntsman Cancer Institute, University of Utah School of Medicine;
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17
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Ren J, Liu S, Cui C, Ten Dijke P. Invasive Behavior of Human Breast Cancer Cells in Embryonic Zebrafish. J Vis Exp 2017. [PMID: 28518096 DOI: 10.3791/55459] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
In many cases, cancer patients do not die of a primary tumor, but rather because of metastasis. Although numerous rodent models are available for studying cancer metastasis in vivo, other efficient, reliable, low-cost models are needed to quickly access the potential effects of (epi)genetic changes or pharmacological compounds. As such, we illustrate and explain the feasibility of xenograft models using human breast cancer cells injected into zebrafish embryos to support this goal. Under the microscope, fluorescent proteins or chemically labeled human breast cancer cells are transplanted into transgenic zebrafish embryos, Tg (fli:EGFP), at the perivitelline space or duct of Cuvier (Doc) 48 h after fertilization. Shortly afterwards, the temporal-spatial process of cancer cell invasion, dissemination, and metastasis in the living fish body is visualized under a fluorescent microscope. The models using different injection sites, i.e., perivitelline space or Doc are complementary to one another, reflecting the early stage (intravasation step) and late stage (extravasation step) of the multistep metastatic cascade of events. Moreover, peritumoral and intratumoral angiogenesis can be observed with the injection into the perivitelline space. The entire experimental period is no more than 8 days. These two models combine cell labeling, micro-transplantation, and fluorescence imaging techniques, enabling the rapid evaluation of cancer metastasis in response to genetic and pharmacological manipulations.
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Affiliation(s)
- Jiang Ren
- Department of Molecular Cell Biology, Cancer Genomics Centre Netherlands, Leiden University Medical Center
| | - Sijia Liu
- Department of Molecular Cell Biology, Cancer Genomics Centre Netherlands, Leiden University Medical Center
| | - Chao Cui
- Department of Molecular Cell Biology, Cancer Genomics Centre Netherlands, Leiden University Medical Center
| | - Peter Ten Dijke
- Department of Molecular Cell Biology, Cancer Genomics Centre Netherlands, Leiden University Medical Center;
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18
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Banach M, Robert J. Tumor immunology viewed from alternative animal models-the Xenopus story. CURRENT PATHOBIOLOGY REPORTS 2017; 5:49-56. [PMID: 28944105 DOI: 10.1007/s40139-017-0125-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A PURPOSE OF REVIEW Nonmammalian comparative animal models are important not only to gain fundamental evolutionary understanding of the complex interactions of tumors with the immune system, but also to better predict the applicability of novel immunotherapeutic approaches to humans. After reviewing recent advances in developing alternative models, we focus on the amphibian Xenopus laevis and its usefulness in deciphering the perplexing roles of MHC class I-like molecules and innate (i)T cells in tumor immunity. B RECENT FINDINGS Experiments using MHC-defined inbred and cloned animals, tumor cell lines, effective reagents, sequenced genomes, and adapted gene editing techniques in Xenopus, have revealed that the critical involvement of class I-like molecules and iT cells in tumor immunity has been conserved during evolution. C SUMMARY Comparative studies with the X. laevis tumor immunity model can contribute to the development of better and more efficient cancer immunotherapies.
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Affiliation(s)
- Maureen Banach
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, USA
| | - Jacques Robert
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, USA
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19
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Hou J, Wang G, Zhang X, Wang Y, Sun Z, Si F, Jiang X, Liu H. Production and verification of a 2 nd generation clonal group of Japanese flounder, Paralichthys olivaceus. Sci Rep 2016; 6:35776. [PMID: 27767055 PMCID: PMC5073307 DOI: 10.1038/srep35776] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 10/05/2016] [Indexed: 12/02/2022] Open
Abstract
Clonal fishes are useful tools in biology and aquaculture studies due to their isogenicity. In Japanese flounder (Paralichthys olivaceus), a group of homozygous clones was created by inducing meiogynogenesis in eggs from a mitogynogenetic homozygous diploid. As the clones reached sexual maturity, meiogynogenesis was again induced in order to produce a 2nd generation clonal group of Japanese flounder. After 3 months, there were 611 healthy, surviving individuals. Twenty-four microsatellite markers, that covered all the linkage groups of Japanese flounder, were used to identify the homozygosity of the 2nd generation clones; no heterozygous locus was detected. This indicates that the production of a 2nd generation clonal group of Japanese flounder was successful. Restriction-site DNA associated sequencing at the genomic level also confirmed the homozygosity and clonality of the 2nd generation clonal group. Furthermore, these 2nd generation clones had a small coefficient of variation for body shape indices at 210 days of age and showed a high degree of similarity in body characteristics among individuals. The successful production of 2nd generation clones has laid the foundation for the large-scale production of clonal Japanese flounder.
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Affiliation(s)
- Jilun Hou
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Guixing Wang
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Xiaoyan Zhang
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Yufen Wang
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Zhaohui Sun
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Fei Si
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Xiufeng Jiang
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
| | - Haijin Liu
- Beidaihe Central Experiment Station, Chinese Academy of Fishery Sciences, Qinhuangdao 066100, China
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20
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Alternative haplotypes of antigen processing genes in zebrafish diverged early in vertebrate evolution. Proc Natl Acad Sci U S A 2016; 113:E5014-23. [PMID: 27493218 DOI: 10.1073/pnas.1607602113] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Antigen processing and presentation genes found within the MHC are among the most highly polymorphic genes of vertebrate genomes, providing populations with diverse immune responses to a wide array of pathogens. Here, we describe transcriptome, exome, and whole-genome sequencing of clonal zebrafish, uncovering the most extensive diversity within the antigen processing and presentation genes of any species yet examined. Our CG2 clonal zebrafish assembly provides genomic context within a remarkably divergent haplotype of the core MHC region on chromosome 19 for six expressed genes not found in the zebrafish reference genome: mhc1uga, proteasome-β 9b (psmb9b), psmb8f, and previously unknown genes psmb13b, tap2d, and tap2e We identify ancient lineages for Psmb13 within a proteasome branch previously thought to be monomorphic and provide evidence of substantial lineage diversity within each of three major trifurcations of catalytic-type proteasome subunits in vertebrates: Psmb5/Psmb8/Psmb11, Psmb6/Psmb9/Psmb12, and Psmb7/Psmb10/Psmb13. Strikingly, nearby tap2 and MHC class I genes also retain ancient sequence lineages, indicating that alternative lineages may have been preserved throughout the entire MHC pathway since early diversification of the adaptive immune system ∼500 Mya. Furthermore, polymorphisms within the three MHC pathway steps (antigen cleavage, transport, and presentation) are each predicted to alter peptide specificity. Lastly, comparative analysis shows that antigen processing gene diversity is far more extensive than previously realized (with ancient coelacanth psmb8 lineages, shark psmb13, and tap2t and psmb10 outside the teleost MHC), implying distinct immune functions and conserved roles in shaping MHC pathway evolution throughout vertebrates.
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21
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Abstract
Zebrafish represents a powerful model for cancer research. Particularly, the xenotransplantation of human cancer cells into zebrafish has enormous potential for further evaluation of cancer progression and drug discovery. Various cancer models have been established in adults, juveniles and embryos of zebrafish. This xenotransplantation zebrafish model provides a unique opportunity to monitor cancer proliferation, tumor angiogenesis, metastasis, self-renewal of cancer stem cells, and drug response in real time in vivo. This review summarizes the use of zebrafish as a model for cancer xenotransplantation, and highlights its advantages and disadvantages.
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22
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Abstract
Zebrafish as a model system have been instrumental in understanding early vertebrate development, especially of the hematopoietic system. The external development of zebrafish and their genetic amenability have allowed in-depth studies of multiple blood cell types and their respective genetic regulation. This chapter highlights some new data in zebrafish hematopoiesis regarding primitive and definitive hematopoiesis in the embryonic and adult fish, allowing the isolation of prospective progenitor subsets. It also highlights assays developed to examine the function of these progenitors in vivo and in vitro, allowing an evolutionary understanding of the hematopoietic system and how zebrafish can be better utilized as a model system for a multitude of hematopoietic disorders.
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Affiliation(s)
- D L Stachura
- California State University, Chico, Chico, CA, United States
| | - D Traver
- University of California, San Diego, San Diego, CA, United States
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23
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Allograft Cancer Cell Transplantation in Zebrafish. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 916:265-87. [PMID: 27165358 DOI: 10.1007/978-3-319-30654-4_12] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Allogeneic cell transplantation is the transfer of cells from one individual into another of the same species and has become an indispensable technique for studying development, immunology, regeneration and cancer biology. In experimental settings, tumor cell engraftment into immunologically competent recipients has greatly increased our understanding of the mechanisms that drive self-renewal, progression and metastasis in vivo. Zebrafish have quickly emerged as a powerful genetic model of cancer that has benefited greatly from allogeneic transplantation. Efficient engraftment can be achieved by transplanting cells into either early larval stage zebrafish that have not yet developed a functional acquired immune system or adult zebrafish following radiation or chemical ablation of the immune system. Alternatively, transplantation can be completed in adult fish using either clonal syngeneic strains or newly-generated immune compromised zebrafish models that have mutations in genes required for proper immune cell function. Here, we discuss the current state of cell transplantation as it pertains to zebrafish cancer and the available models used for dissecting important processes underlying cancer. We will also use the zebrafish model to highlight the power of cell transplantation, including its capacity to dynamically assess functional heterogeneity within individual cancer cells, visualize cancer progression and evolution, assess tumor-propagating potential and self-renewal, image cancer cell invasion and dissemination and identify novel therapies for treating cancer.
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24
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25
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Astin JW, Crosier PS. Lymphatics, Cancer and Zebrafish. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 916:199-218. [DOI: 10.1007/978-3-319-30654-4_9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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26
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Kawasaki T, Sakai N. Allogeneic Transplantation of Testicular Hyperplasia in rag1 Mutant Zebrafish. Bio Protoc 2016. [DOI: 10.21769/bioprotoc.1992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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27
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Campbell C, Su T, Lau RP, Shah A, Laurie PC, Avalos B, Aggio J, Harris E, Traver D, Stachura DL. Zebrafish embryonic stromal trunk (ZEST) cells support hematopoietic stem and progenitor cell (HSPC) proliferation, survival, and differentiation. Exp Hematol 2015; 43:1047-61. [PMID: 26391449 DOI: 10.1016/j.exphem.2015.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 08/11/2015] [Accepted: 09/03/2015] [Indexed: 10/23/2022]
Abstract
Forward genetic screens in zebrafish have been used to identify genes essential for the generation of primitive blood and the emergence of hematopoietic stem cells (HSCs), but have not elucidated the genes essential for hematopoietic stem and progenitor cell (HSPC) proliferation and differentiation because of the lack of methodologies to functionally assess these processes. We previously described techniques used to test the developmental potential of HSPCs by culturing them on zebrafish kidney stromal (ZKS) cells, derived from the main site of hematopoiesis in the adult teleost. Here we describe an additional primary stromal cell line we refer to as zebrafish embryonic stromal trunk (ZEST) cells, derived from tissue surrounding the embryonic dorsal aorta, the site of HSC emergence in developing fish. ZEST cells encouraged HSPC differentiation toward the myeloid, lymphoid, and erythroid pathways when assessed by morphologic and quantitative reverse transcription polymerase chain reaction analyses. Additionally, ZEST cells significantly expanded the number of cultured HSPCs in vitro, indicating that these stromal cells are supportive of both HSPC proliferation and multilineage differentiation. Examination of ZEST cells indicates that they express numerous cytokines and Notch ligands and possess endothelial characteristics. Further characterization of ZEST cells should prove to be invaluable in understanding the complex signaling cascades instigated by the embryonic hematopoietic niche required to expand and differentiate HSPCs. Elucidating these processes and identifying possibilities for the modulation of these molecular pathways should allow the in vitro expansion of HSPCs for a multitude of therapeutic uses.
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Affiliation(s)
- Clyde Campbell
- Department of Cellular and Molecular Medicine, University of California at San Diego School of Medicine, La Jolla, California, USA
| | - Tammy Su
- Department of Cellular and Molecular Medicine, University of California at San Diego School of Medicine, La Jolla, California, USA
| | - Ryan P Lau
- Department of Cellular and Molecular Medicine, University of California at San Diego School of Medicine, La Jolla, California, USA
| | - Arpit Shah
- Department of Biological Sciences, California State University, Chico, California, USA
| | - Payton C Laurie
- Department of Biological Sciences, California State University, Chico, California, USA
| | - Brenda Avalos
- Department of Biological Sciences, California State University, Chico, California, USA
| | - Julian Aggio
- Department of Biological Sciences, California State University, Chico, California, USA
| | - Elena Harris
- Department of Biological Sciences, California State University, Chico, California, USA
| | - David Traver
- Department of Cellular and Molecular Medicine, University of California at San Diego School of Medicine, La Jolla, California, USA
| | - David L Stachura
- Department of Biological Sciences, California State University, Chico, California, USA.
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28
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Generation of clonal zebrafish line by androgenesis without egg irradiation. Sci Rep 2015; 5:13346. [PMID: 26289165 PMCID: PMC4542340 DOI: 10.1038/srep13346] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/22/2015] [Indexed: 12/02/2022] Open
Abstract
Generation of clonal zebrafish will facilitate large-scale genetic screening and help us to overcome other biological and biotechnological challenges due to their isogenecity. However, protocols for the development of clonal lines have not been optimized. Here, we sought to develop a novel method for generation of clonal zebrafish by androgenesis induced by cold shock. Androgenetic zebrafish doubled haploids (DHs) were induced by cold shock of just-fertilized eggs, and the eggs were then heat shocked to double the chromosome set. The yield rate of putative DHs relative to the total number of eggs used was 1.10% ± 0.19%. Microsatellite genotyping of the putative DHs using 30 loci that covered all 25 linkage groups detected no heterozygous loci, confirming the homozygosity of the DHs. Thus, a clonal line was established from sperm of a DH through a second cycle of cold-shock androgenesis and heat-shock chromosome doubling, followed by genetic verification of the isogenic rate confirming the presence of identical DNA fingerprints by using amplified fragment length polymorphism markers. In addition, our data provided important insights into the cytological mechanisms of cold-shock–induced androgenesis.
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29
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Zhao S, Huang J, Ye J. A fresh look at zebrafish from the perspective of cancer research. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2015; 34:80. [PMID: 26260237 PMCID: PMC4531851 DOI: 10.1186/s13046-015-0196-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 07/28/2015] [Indexed: 12/31/2022]
Abstract
Zebrafish represent a vertebrate model organism that has been widely, and increasingly, employed over the last decade in the study of developmental processes, wound healing, microbe-host interactions, and drug screening. With the increase in the laboratory use of zebrafish, several advantages, such as a high genetic homology to humans and transparent embryos, which allow clear disease evaluation, have greatly widened its use as a model for studying tumor development in vivo. The use of zebrafish has been applied in several areas of cancer research, mainly in the following domains: (1) establishing cancer models by carcinogenic chemical, genetic technology, and xenotransplantation; (2) evaluating tumor angiogenesis; (3) studying tumor metastasis; and (4) anti-tumor drug screening and drug toxicity evaluation. In this study, we provide a comprehensive overview of the role of zebrafish in order to underline the advantages of using them as a model organism in cancer research. Several related successful events are also reviewed.
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Affiliation(s)
- Shuai Zhao
- Department of Surgical oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Jian Huang
- Department of Surgical oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.
| | - Jun Ye
- Department of Gastroenterology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.
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30
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Abstract
The liver performs a large number of essential synthetic and regulatory functions that are acquired during fetal development and persist throughout life. Their disruption underlies a diverse group of heritable and acquired diseases that affect both pediatric and adult patients. Although experimental analyses used to study liver development and disease are typically performed in cell culture models or rodents, the zebrafish is increasingly used to complement discoveries made in these systems. Forward and reverse genetic analyses over the past two decades have shown that the molecular program for liver development is largely conserved between zebrafish and mammals, and that the zebrafish can be used to model heritable human liver disorders. Recent work has demonstrated that zebrafish can also be used to study the mechanistic basis of acquired liver diseases. Here, we provide a comprehensive summary of how the zebrafish has contributed to our understanding of human liver development and disease.
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Affiliation(s)
- Benjamin J Wilkins
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
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31
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Abstract
The zebrafish is a recent addition to animal models of human cancer, and studies using this model are rapidly contributing major insights. Zebrafish develop cancer spontaneously, after mutagen exposure and through transgenesis. The tumours resemble human cancers at the histological, gene expression and genomic levels. The ability to carry out in vivo imaging, chemical and genetic screens, and high-throughput transgenesis offers a unique opportunity to functionally characterize the cancer genome. Moreover, increasingly sophisticated modelling of combinations of genetic and epigenetic alterations will allow the zebrafish to complement what can be achieved in other models, such as mouse and human cell culture systems.
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Affiliation(s)
- Richard White
- Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.
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32
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Spaink HP, Cui C, Wiweger MI, Jansen HJ, Veneman WJ, Marín-Juez R, de Sonneville J, Ordas A, Torraca V, van der Ent W, Leenders WP, Meijer AH, Snaar-Jagalska BE, Dirks RP. Robotic injection of zebrafish embryos for high-throughput screening in disease models. Methods 2013; 62:246-54. [PMID: 23769806 DOI: 10.1016/j.ymeth.2013.06.002] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 05/31/2013] [Accepted: 06/03/2013] [Indexed: 12/31/2022] Open
Abstract
The increasing use of zebrafish larvae for biomedical research applications is resulting in versatile models for a variety of human diseases. These models exploit the optical transparency of zebrafish larvae and the availability of a large genetic tool box. Here we present detailed protocols for the robotic injection of zebrafish embryos at very high accuracy with a speed of up to 2000 embryos per hour. These protocols are benchmarked for several applications: (1) the injection of DNA for obtaining transgenic animals, (2) the injection of antisense morpholinos that can be used for gene knock-down, (3) the injection of microbes for studying infectious disease, and (4) the injection of human cancer cells as a model for tumor progression. We show examples of how the injected embryos can be screened at high-throughput level using fluorescence analysis. Our methods open up new avenues for the use of zebrafish larvae for large compound screens in the search for new medicines.
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Affiliation(s)
- Herman P Spaink
- Department of Molecular Cell Biology, Institute of Biology, Leiden University, The Netherlands.
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Choorapoikayil S, Overvoorde J, den Hertog J. Deriving cell lines from zebrafish embryos and tumors. Zebrafish 2013; 10:316-25. [PMID: 23672287 DOI: 10.1089/zeb.2013.0866] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Over the last two decades the zebrafish has emerged as a powerful model organism in science. The experimental accessibility, the broad range of zebrafish mutants, and the highly conserved genetic and biochemical pathways between zebrafish and mammals lifted zebrafish to become one of the most attractive vertebrate models to study gene function and to model human diseases. Zebrafish cell lines are highly attractive to investigate cell biology and zebrafish cell lines complement the experimental tools that are available already. We established a straightforward method to culture cells from a single zebrafish embryo or a single tumor. Here we describe the generation of fibroblast-like cell lines from wild-type and ptenb(-/-) embryos and an endothelial-like cell line from a tumor of an adult ptena(+/-)ptenb(-/-) zebrafish. This protocol can easily be adapted to establish stable cell lines from any mutant or transgenic zebrafish line and the average time to obtain a pro-stable cell line is 3-5 months.
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Through the looking glass: visualizing leukemia growth, migration, and engraftment using fluorescent transgenic zebrafish. Adv Hematol 2012; 2012:478164. [PMID: 22829834 PMCID: PMC3399386 DOI: 10.1155/2012/478164] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 05/23/2012] [Indexed: 01/29/2023] Open
Abstract
Zebrafish have emerged as a powerful model of development and cancer. Human, mouse, and zebrafish malignancies exhibit striking histopathologic and molecular similarities, underscoring the remarkable conservation of genetic pathways required to induce cancer. Zebrafish are uniquely suited for large-scale studies in which hundreds of animals can be used to investigate cancer processes. Moreover, zebrafish are small in size, optically clear during development, and amenable to genetic manipulation. Facile transgenic approaches and new technologies in gene inactivation have provided much needed genomic resources to interrogate the function of specific oncogenic and tumor suppressor pathways in cancer. This manuscript focuses on the unique attribute of labeling leukemia cells with fluorescent proteins and directly visualizing cancer processes in vivo including tumor growth, dissemination, and intravasation into the vasculature. We will also discuss the use of fluorescent transgenic approaches and cell transplantation to assess leukemia-propagating cell frequency and response to chemotherapy.
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Histocompatibility and hematopoietic transplantation in the zebrafish. Adv Hematol 2012; 2012:282318. [PMID: 22778744 PMCID: PMC3388487 DOI: 10.1155/2012/282318] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Accepted: 05/01/2012] [Indexed: 12/14/2022] Open
Abstract
The zebrafish has proven to be an excellent model for human disease, particularly hematopoietic diseases, since these fish make similar types of blood cells as humans and other mammals. The genetic program that regulates the development and differentiation of hematopoietic cells is highly conserved. Hematopoietic stem cells (HSCs) are the source of all the blood cells needed by an organism during its lifetime. Identifying an HSC requires a functional assay, namely, a transplantation assay consisting of multilineage engraftment of a recipient and subsequent serial transplant recipients. In the past decade, several types of hematopoietic transplant assays have been developed in the zebrafish. An understanding of the major histocompatibility complex (MHC) genes in the zebrafish has lagged behind transplantation experiments, limiting the ability to perform unbiased competitive transplantation assays. This paper summarizes the different hematopoietic transplantation experiments performed in the zebrafish, both with and without immunologic matching, and discusses future directions for this powerful experimental model of human blood diseases.
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Generation of highly homogeneous strains of zebrafish through full sib-pair mating. G3-GENES GENOMES GENETICS 2011; 1:377-86. [PMID: 22384348 PMCID: PMC3276154 DOI: 10.1534/g3.111.000851] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2011] [Accepted: 08/23/2011] [Indexed: 12/21/2022]
Abstract
Genetically homogeneous populations, such as inbred strains, are powerful experimental tools that are ideally suited for studying immunology, cancer, and genetics of complex traits. The zebrafish, Danio rerio, has been underutilized in these research areas because homogeneous strains of experimental fish have not been available in tractable condition. Here, we attempted to inbreed two zebrafish wild-type strains, Tübingen and India, through full sib-pair mating. Although the inbred Tübingen strain failed to thrive and was lost after 13 generations, an inbred India strain (IM) has been maintained successfully. The IM strain has endured 16 generations of inbreeding and has maintained a healthy condition. Two additional strains, IM12m and IM14m, were established as closed colonies from the branches of the IM strain. Genotype analyses using genetic markers revealed a dramatic decrease in polymorphisms (62% dropped to 5%) in both IM (generation 14) and the two closed colonies. This indicates a high level of homogeneity in these strains. Furthermore, scale transplantations between individuals within each strain were successful. These data suggest that extremely homogeneous zebrafish strains have been established, thereby creating a valuable resource for practical application.
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Blackburn JS, Liu S, Langenau DM. Quantifying the frequency of tumor-propagating cells using limiting dilution cell transplantation in syngeneic zebrafish. J Vis Exp 2011:e2790. [PMID: 21775966 PMCID: PMC3196193 DOI: 10.3791/2790] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Self-renewing cancer cells are the only cell types within a tumor that have an unlimited ability to promote tumor growth, and are thus known as tumor-propagating cells, or tumor-initiating cells. It is thought that targeting these self-renewing cells for destruction will block tumor progression and stop relapse, greatly improving patient prognosis1. The most common way to determine the frequency of self-renewing cells within a tumor is a limiting dilution cell transplantation assay, in which tumor cells are transplanted into recipient animals at increasing doses; the proportion of animals that develop tumors is used the calculate the number of self-renewing cells within the original tumor sample2, 3. Ideally, a large number of animals would be used in each limiting dilution experiment to accurately determine the frequency of tumor-propagating cells. However, large scale experiments involving mice are costly, and most limiting dilution assays use only 10-15 mice per experiment. Zebrafish have gained prominence as a cancer model, in large part due to their ease of genetic manipulation and the economy by which large scale experiments can be performed. Additionally, the cancer types modeled in zebrafish have been found to closely mimic their counterpart human disease4. While it is possible to transplant tumor cells from one fish to another by sub-lethal irradiation of recipient animals, the regeneration of the immune system after 21 days often causes tumor regression5. The recent creation of syngeneic zebrafish has greatly facilitated tumor transplantation studies 6-8. Because these animals are genetically identical, transplanted tumor cells engraft robustly into recipient fish, and tumor growth can be monitored over long periods of time. Syngeneic zebrafish are ideal for limiting dilution transplantation assays in that tumor cells do not have to adapt to growth in a foreign microenvironment, which may underestimate self-renewing cell frequency9, 10. Additionally, one-cell transplants have been successfully completed using syngeneic zebrafish8 and several hundred animals can be easily and economically transplanted at one time, both of which serve to provide a more accurate estimate of self-renewing cell frequency. Here, a method is presented for creating primary, fluorescently-labeled T-cell acute lymphoblastic leukemia (T-ALL) in syngeneic zebrafish, and transplanting these tumors at limiting dilution into adult fish to determine self-renewing cell frequency. While leukemia is provided as an example, this protocol is suitable to determine the frequency of tumor-propagating cells using any cancer model in the zebrafish.
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Affiliation(s)
- Jessica S Blackburn
- Department of Molecular Pathology, Massachusetts General Hospital, Harvard Medical School, USA
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Nguyen AT, Emelyanov A, Koh CHV, Spitsbergen JM, Lam SH, Mathavan S, Parinov S, Gong Z. A high level of liver-specific expression of oncogenic Kras(V12) drives robust liver tumorigenesis in transgenic zebrafish. Dis Model Mech 2011; 4:801-13. [PMID: 21729876 PMCID: PMC3209649 DOI: 10.1242/dmm.007831] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Human liver cancer is one of the deadliest cancers worldwide, with hepatocellular carcinoma (HCC) being the most common type. Aberrant Ras signaling has been implicated in the development and progression of human HCC, but a complete understanding of the molecular mechanisms of this protein in hepatocarcinogenesis remains elusive. In this study, a stable in vivo liver cancer model using transgenic zebrafish was generated to elucidate Ras-driven tumorigenesis in HCC. Using the liver-specific fabp10 (fatty acid binding protein 10) promoter, we overexpressed oncogenic krasV12 specifically in the transgenic zebrafish liver. Only a high level of krasV12 expression initiated liver tumorigenesis, which progressed from hyperplasia to benign and malignant tumors with activation of the Ras-Raf-MEK-ERK and Wnt–β-catenin pathways. Histological diagnosis of zebrafish tumors identified HCC as the main lesion. The tumors were invasive and transplantable, indicating malignancy of these HCC cells. Oncogenic krasV12 was also found to trigger p53-dependent senescence as a tumor suppressive barrier in the pre-neoplastic stage. Microarray analysis of zebrafish liver hyperplasia and HCC uncovered the deregulation of several stage-specific and common biological processes and signaling pathways responsible for krasV12-driven liver tumorigenesis that recapitulated the molecular hallmarks of human liver cancer. Cross-species comparisons of cancer transcriptomes further defined a HCC-specific gene signature as well as a liver cancer progression gene signature that are evolutionarily conserved between human and zebrafish. Collectively, our study presents a comprehensive portrait of molecular mechanisms during progressive Ras-induced HCC. These observations indicate the validity of our transgenic zebrafish to model human liver cancer, and this model might act as a useful platform for drug screening and identifying new therapeutic targets.
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Affiliation(s)
- Anh Tuan Nguyen
- Department of Biological Sciences, National University of Singapore, Singapore, 117543
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High-throughput imaging of adult fluorescent zebrafish with an LED fluorescence macroscope. Nat Protoc 2011; 6:229-41. [PMID: 21293462 DOI: 10.1038/nprot.2010.170] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Zebrafish are a useful vertebrate model for the study of development, behavior, disease and cancer. A major advantage of zebrafish is that large numbers of animals can be economically used for experimentation; however, high-throughput methods for imaging live adult zebrafish had not been developed. Here, we describe protocols for building a light-emitting diode (LED) fluorescence macroscope and for using it to simultaneously image up to 30 adult animals that transgenically express a fluorescent protein, are transplanted with fluorescently labeled tumor cells or are tagged with fluorescent elastomers. These protocols show that the LED fluorescence macroscope is capable of distinguishing five fluorescent proteins and can image unanesthetized swimming adult zebrafish in multiple fluorescent channels simultaneously. The macroscope can be built and used for imaging within 1 day, whereas creating fluorescently labeled adult zebrafish requires 1 hour to several months, depending on the method chosen. The LED fluorescence macroscope provides a low-cost, high-throughput method to rapidly screen adult fluorescent zebrafish and it will be useful for imaging transgenic animals, screening for tumor engraftment, and tagging individual fish for long-term analysis.
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Abstract
Zebrafish are an ideal model organism to research cancer. Zebrafish embryos and larvae are optically translucent, which has made imaging multiple processes in development and disease possible. When coupled with fluorescent imaging techniques, zebrafish are fast becoming a model of choice for following tumor formation. This is highlighted by recent studies using fluorescent proteins to image xenograft transplantation, neovascularization, growth responses to drug treatments, and self-renewal. Fluorescent labeled tumors can be generated in zebrafish by multiple methods including chemical mutagenesis, oncogene expression by mosaic or stable transgenesis, or genetic mutations that are predisposing to cancer. In this chapter, we highlight the studies that have employed fluorescence to follow critical aspects of tumorigenesis, with particular focus on providing methods for labeling, isolating, transplanting, and imaging fluorescently labeled tumors in zebrafish.
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Affiliation(s)
- Myron S Ignatius
- Molecular Pathology Unit, Massachusetts General Hospital, Charlestown, Massachusetts, USA
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Moshal KS, Ferri-Lagneau KF, Leung T. Zebrafish Model: Worth Considering in Defining Tumor Angiogenesis. Trends Cardiovasc Med 2010; 20:114-9. [DOI: 10.1016/j.tcm.2010.10.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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