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Back to Top LOGIN TO YOUR ACCOUNT Username Password Forgot password? Keep me logged in OpenAthens New User Institutional Login CHANGE PASSWORD Old Password New Password Too Short Weak Medium Strong Very Strong Too Long PASSWORD CHANGED SUCCESSFULLY Your password has been changed CREATE A NEW ACCOUNT Email Returning user Can't sign in? Forgot your password? Enter your email address below and we will send you the reset instructions Email Cancel If the address matches an existing account you will receive an email with instructions to reset your password. Close REQUEST USERNAME Can't sign in? Forgot your username? Enter your email address below and we will send you your username Email Close If the address matches an existing account you will receive an email with instructions to retrieve your username * This Journal * This Journal * Anywhere Quick Search in Journals Enter words / phrases / DOI / ISBN / keywords / authors / etc SearchSearch Quick Search anywhere Enter words / phrases / DOI / ISBN / keywords / authors / etc SearchSearch Advanced Search * * Institutional Access * 0 Home * About Us * Publications Journal Collections Biomedical ResearchBiotechnology and Regenerative MedicineMedicine and SurgeryEnvironmental Research and PolicyIntegrative MedicineLaw and PolicyNursingPublic Health Research and PolicySurgeryTechnology and Engineering Publications by Type Journals (Print/Online)Journals (Open Access)Journals (Video)Books/eBooksTrade MagazineseNewsletters All Publications A to ZRecommend a Title to Your Library * For Authors * Librarians * Open Access * Advertising * Custom ZebrafishVol. 17, No. 1 TechnoFish—MethodsFree Access RAPID AND EFFICIENT LIVE ZEBRAFISH EMBRYO GENOTYPING * Xue Zhang, * Zhaojunjie Zhang, * Qinshun Zhao, and * Xin Lou Xue Zhang Model Animal Research Centre, Nanjing University, Nanjing, China. *These authors contributed equally to this work. Search for more papers by this author , Zhaojunjie Zhang Model Animal Research Centre, Nanjing University, Nanjing, China. *These authors contributed equally to this work. Search for more papers by this author , Qinshun Zhao Model Animal Research Centre, Nanjing University, Nanjing, China. Search for more papers by this author , and Xin Lou Address correspondence to: Xin Lou, PhD, Model Animal Research Centre, Nanjing University, Room 403B, 12 Xuefu Road, Nanjing 210093, China E-mail Address: xin.lou@nju.edu.cn Model Animal Research Centre, Nanjing University, Nanjing, China. Search for more papers by this author Published Online:28 Jan 2020https://doi.org/10.1089/zeb.2019.1796 About * Figures * References * Related * Details * Sections * Abstract * Ethics Approval * Acknowledgments * Authors' Contributions * Disclosure Statement * Funding Information * Supplementary Material * View article * Supplemental Material * PDF/EPUB * View Supplemental Data * Permissions & Citations * Permissions * Download Citations * Track Citations * Add to favorites * Back To Publication * Share Share on * Facebook * Twitter * Linked In * Reddit * Email View article * Supplemental Material * PDF/EPUB * View Supplemental Data ABSTRACT Most current methods for genotyping zebrafish embryos require sacrifice or raising the animal to at least 1 month of age for fin amputation. These limitations restrict the use of zebrafish and increase time and costs for experiments. This article introduces an innovative method for genotyping live zebrafish embryos. The method utilizes enzyme to extract a small amount of genetic material from the skin tissue of the embryo. Then, using conventional polymerase chain reaction (PCR) strategy, the embryo is genotyped. This approach was successful >95% of the time while maintaining high viability (>90%) of the embryo. This effective method can facilitate high-throughput screening and other applications in zebrafish. As a powerful vertebrate model system, zebrafish is being widely used in research fields ranging from developmental biology, disease modeling, and drug discovery. One of the advantages of zebrafish as a model is its amenability to genetic manipulation, which has been dramatically improved with recently developed genetic tools such as clustered regularly interspaced short palindromic repeats (CRISPR) technology. However, using current methods for genotyping zebrafish, embryos must be sacrificed; or fish must be raised to at least 1 month old to have a fin clip collected.1 Methods have been described for genotyping of live embryos; however, these require special instruments2,3 or tedious surgical procedures.4,5 These limitations increase time and cost for experiments and prohibit larger-scale phenotypic screens. Methods to enable fast genotyping of live zebrafish embryos in a high-throughput manner would have extensive applicability and practical significance. As the zebrafish embryo has a remarkable capacity to regenerate, we set out to establish a cost-efficient live embryo genotyping method based on limited proteinase digestion. First, we tested the DNA extraction ability of different types of proteinases on 72 h postfertilization (hpf) embryos in embryo culture medium. To enhance the digestion efficacy, the samples were incubated at 37°C and constantly mixed on a multiwell plate shaker (Fig. 1A). The results showed both pronase and proteinase K could release DNA from embryo skin tissue, with embryos treated by proteinase K showing higher viability. We, therefore, optimized the procedure with proteinase K (Supplementary Fig. S1A). To further improve the genotyping sensitivity, we prepared four different types of buffer after literature review and compared the DNA extraction efficiency and embryo viability for each. The results showed that when using 30 mM Tris (pH8.0), genotyping polymerase chain reaction (PCR) could be successfully performed in 90% of samples, with a 90% survival rate of genotyped embryos (Fig. 1B and Supplementary Fig. S1B). For applications, including drug screens, mutant genotyping, and genetic screens, researchers require genotype information as rapidly as possible. To minimize the damage of enzyme treatment to the early stage embryo, we optimized the concentration of proteinase K, treatment time, and shaking speed for embryos from 24 to 96 hpf (Supplementary Fig. S1C–F) and listed the recommended treatment conditions in a detailed protocol (Supplementary Data). To test the quality of DNA obtained from the method, we deployed PCR for a variety of amplicon and DNA sequences, and found that up to 1.2 kb could be successfully amplified (Fig. 1C and Supplementary Table S1). We also assessed the possible adverse effects of the treatment on larva behavior, fish survival, and fecundity (Supplementary Fig. S2), with no significant effects observed. FIG. 1. Rapid and efficient live zebrafish embryo genotyping. (A) The step procedure for the method. (B) Representative image of genotyped zebrafish larva at 7 dpf. Lateral view, head to left. (C) Representative PCR results. dpf, days postfertilization; NC, negative control; PC, positive control; PCR, polymerase chain reaction. To further enhance the throughput of this method, we established a two-round procedure. At 48 hpf, up to eight embryos could be pooled into 1 well of a 24-well plate, and the mixed DNA was prepared and tested in first-round genotyping. The embryos from positive pools were cultured to allow recovery. At 96 hpf, these embryos were individually re-genotyped (Supplementary Fig. S3). This procedure (see note in the protocol) is suitable for genotyping screens especially those with a low germline transmission rate (such as CRISPR/Cas9-mediated knock-in, base-editing, and large fragment deletion), such that up to 800 embryos could be processed by one person in one round of genotyping. Our results show that this method provides a fast, cost-efficient, and high-throughput compatible solution to genotyping live zebrafish embryos. The genetic material obtained from this method is suitable for detecting SNPs, transgenes, and mutations, including single base-pair changes, insertions, or deletions. To our knowledge, this is the first report of a limited digestion method and could facilitate the use of zebrafish embryos in biomedical research. ETHICS APPROVAL Zebrafish were housed and handled as per Nanjing University Laboratory Animal Services guidelines. All the protocols involving the use of animals were in accordance with approved guidelines of the Institutional Animal Care and Use Committee of the Nanjing University. ACKNOWLEDGMENTS We thank Prof. Ian C. Scott at University of Toronto, for help in editing the article, and members of Di Chen Laboratory at Nanjing University, for the help during this project. AUTHORS' CONTRIBUTIONS X.L. and Q.Z. conceived and supervised the project. X.Z. and Z.Z. performed experiments and analyzed the data. X.L. wrote the article. DISCLOSURE STATEMENT No competing financial interests exist. FUNDING INFORMATION This research was undertaken, in part, thanks to grant funding from National Natural Science Foundation of China (NSFC 31671505 and 31970765 to X.L). SUPPLEMENTARY MATERIAL Supplementary Data Supplementary Figure S1 Supplementary Figure S2 Supplementary Figure S3 Supplementary Table S1 * Figures * References * Related * Details REFERENCES * 1. Parant JM, George SA, Pryor R, Wittwer CT, Yost HJ. A rapid and efficient method of genotyping zebrafish mutants. Dev Dyn 2009;238:3168–3174. Crossref, Medline, Google Scholar * 2. Samuel R, Stephenson R, Roy P, Pryor R, Zhou L, Bonkowsky JL, et al. Microfluidic-aided genotyping of zebrafish in the first 48 h with 100% viability. Biomed Microdevices 2015;17:43. Crossref, Medline, Google Scholar * 3. Lambert CJ, Freshner BC, Chung A, Stevenson TJ, Bowles DM, Samuel R, et al. An automated system for rapid cellular extraction from live zebrafish embryos and larvae: development and application to genotyping. PLoS One 2018;13:e0193180. Crossref, Medline, Google Scholar * 4. Xing L, Quist TS, Stevenson TJ, Dahlem TJ, Bonkowsky JL. Rapid and efficient zebrafish genotyping using PCR with high-resolution melt analysis. J Vis Exp 2014;e51138. Medline, Google Scholar * 5. Kosuta C, Daniel K, Johnstone DL, Mongeon K, Ban K, Leblanc S, et al.. High-throughput DNA extraction and genotyping of 3dpf zebrafish larvae by fin clipping. J Vis Exp 2018. DOI: 10.3791/58024. Crossref, Medline, Google Scholar * Cited by * Improved selection of zebrafish CRISPR editing by early next-generation sequencing based genotyping 27 January 2023 | Scientific Reports, Vol. 13, No. 1 * Integration of cooperative and opposing molecular programs drives learning-associated behavioral plasticity 27 March 2023 | PLOS Genetics, Vol. 19, No. 3 * blf and the drl cluster synergistically regulate cell fate commitment during zebrafish primitive hematopoiesis 14 December 2022 | Development, Vol. 149, No. 24 * A minimally invasive fin scratching protocol for fast genotyping and early selection of zebrafish embryos 30 December 2022 | Scientific Reports, Vol. 12, No. 1 * Genetic therapy in a mitochondrial disease model suggests a critical role for liver dysfunction in mortality 21 November 2022 | eLife, Vol. 11 * DPP9 deficiency: An inflammasomopathy that can be rescued by lowering NLRP1/IL-1 signaling Science Immunology, Vol. 7, No. 75 * The FusX TALE Base Editor (FusXTBE) for Rapid Mitochondrial DNA Programming of Human Cells In Vitro and Zebrafish Disease Models In Vivo * Ankit Sabharwal, * Bibekananda Kar, * Santiago Restrepo-Castillo, * Shannon R. Holmberg, * Neal D. Mathew, * Benjamin Luke Kendall, * Ryan P. Cotter, * Zachary WareJoncas, * Christoph Seiler, * Eiko Nakamaru-Ogiso, * Karl J. Clark, and * Stephen C. Ekker 16 December 2021 | The CRISPR Journal, Vol. 4, No. 6 * A deterministic genotyping workflow reduces waste of transgenic individuals by two-thirds 28 July 2021 | Scientific Reports, Vol. 11, No. 1 * Modeling Lysosomal Storage Diseases in the Zebrafish 6 May 2020 | Frontiers in Molecular Biosciences, Vol. 7 * Recommended * ADDITIVE MANUFACTURING CAN ASSIST IN THE FIGHT AGAINST COVID-19 AND OTHER PANDEMICS AND IMPACT ON THE GLOBAL SUPPLY CHAIN * Eneko Larrañeta, * Juan Dominguez-Robles, and * Dimitrios A. Lamprou Vol. 7, No. 3 June 2020 * UROLOGIC SURGERY AND COVID-19: HOW THE PANDEMIC IS CHANGING THE WAY WE OPERATE * James E. Steward, * Weston R. Kitley, * C. Max Schmidt, and * Chandru P. Sundaram Vol. 34, No. 5 May 2020 * ROLE OF TISSUE ENGINEERING IN COVID-19 AND FUTURE VIRAL OUTBREAKS * Alexander M. Tatara Vol. 26, No. 9-10 May 2020 * SOFT ROBOTICS IN MINIMALLY INVASIVE SURGERY * Mark Runciman, * Ara Darzi, and * George P. Mylonas Vol. 6, No. 4 August 2019 * COVID-19: GENE TRANSFER TO THE RESCUE? * Luk H. Vandenberghe Vol. 31, No. 11-12 June 2020 Volume 17Issue 1 Feb 2020 Information Copyright 2020, Mary Ann Liebert, Inc., publishers -------------------------------------------------------------------------------- To cite this article: Xue Zhang, Zhaojunjie Zhang, Qinshun Zhao, and Xin Lou.Rapid and Efficient Live Zebrafish Embryo Genotyping.Zebrafish.Feb 2020.56-58.http://doi.org/10.1089/zeb.2019.1796 * Published in Volume: 17 Issue 1: January 28, 2020 * Online Ahead of Print:December 17, 2019 Keywords * basic protocol * genotyping * zebrafish * mutation * transgenes -------------------------------------------------------------------------------- PDF download -------------------------------------------------------------------------------- back Close Figure Viewer Browse All FiguresReturn to FigureChange zoom levelZoom inZoom out Previous FigureNext Figure Caption Back to Top * * * PUBLICATIONS * Publications A-Z * Journal Collections * Publications by Type * Recommend a Title FOR AUTHORS * Fees and Options * Publishing Open Access * Submission Guidelines * Policies LIBRARIANS * Our Journals * Account Support * Archive * Terms & Conditions * Resources * Liebert Link Newsletter * Contact OPEN ACCESS * Open Option * Open Access Journals * Publishing Services * FAQs * Contact CORPORATE CAPABILITIES * Custom Publications * Interactive Media * Other Opportunities * Reprints & ePrints ADVERTISING COMPANY CUSTOMER SUPPORT CONTACT US PRIVACY POLICY © 2023 Mary Ann Liebert, Inc., publishers. 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