Name: dissection of larval zebrafish gonadal tissue
Uploaded: 2017-04-26T14:00:00
Description: Watch this Scientific Journal Video about Dissection of Larval Zebrafish Gonadal Tissue at JoVE.com

Vi takker C Zhang for fisk pleje. Dette arbejde blev støttet af National Natural Science Foundation of China (31171074, 31371099 og 31571067 til GP) og af Pujiang Talent Projekt (09PJ1401900 til GP).

Zebrafisk eksperimenter blev godkendt af Fudan University Institutional Animal Care og brug Udvalg. Zebrafisk er blevet rejst og opdrættet ifølge standardprocedurer 20. 1. Præparater <ol><li> Dyrk 17 dpf og 25 dpf larve zebrafisk <ol><li> Overførsel 2 hanner og 2 kvinder voksne zebrafisk (sund, 3 til 6 måneder gamle, laboratorium AB stamme) til en passage tank i den sene eftermiddag før dagen passage. Adskille hanner og hunner med en barriere. Den næste morge...

<ol>
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R., N&#252;sslein-Volhard, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Germ+line+control+of+female+sex+determination+in+zebrafish.">Germ line control of female sex determination in zebrafish.</a> Dev. Biol. 324 (2), 277-287 (2008).</li><li>Uchida, D., Yamashita, M., Kitano, T., Iguchi, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Oocyte+apoptosis+during+the+transition+from+ovary-like+tissue+to+testes+during+sex+differentiation+of+juvenile+zebrafish.">Oocyte apoptosis during the transition from ovary-like tissue to testes during sex differentiation of juvenile zebrafish.</a> J. Exp. Biol. 205 (Pt 6), 711-718 (2002).</li><li>Groh, K. J., Sch&#246;nenberger, R., Eggen, R. I. L., Segner, H., Suter, M. J. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Analysis+of+protein+expression+in+zebrafish+during+gonad+differentiation+by+targeted+proteomics.">Analysis of protein expression in zebrafish during gonad differentiation by targeted proteomics.</a> Gen. Comp. Endocr. 193, 210-220 (2013).</li><li>Siegfried, K. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+search+of+determinants:+gene+expression+during+gonadal+sex+differentiation.">In search of determinants: gene expression during gonadal sex differentiation.</a> J. Fish Biol. 76 (8), 1879-1902 (2010).</li><li>Small, C. M., Carney, G. E., Mo, Q., Vannucci, M., Jones, A. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+microarray+analysis+of+sex-+and+gonad-biased+gene+expression+in+the+zebrafish:+evidence+for+masculinization+of+the+transcriptome.">A microarray analysis of sex- and gonad-biased gene expression in the zebrafish: evidence for masculinization of the transcriptome.</a> BMC Genomics. 10, 579 (2009).</li><li>Chiang, E. F., Yan, Y. L., Guiguen, Y., Postlethwait, J., Chung, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Two+Cyp19+(P450+aromatase)+genes+on+duplicated+zebrafish+chromosomes+are+expressed+in+ovary+or+brain.">Two Cyp19 (P450 aromatase) genes on duplicated zebrafish chromosomes are expressed in ovary or brain.</a> Mol. Biol. Evol. 18 (4), 542-550 (2001).</li><li>Kishida, M., Callard, G. V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Distinct+cytochrome+P450+aromatase+isoforms+in+zebrafish+(Danio+rerio)+brain+and+ovary+are+differentially+programmed+and+estrogen+regulated+during+early+development.">Distinct cytochrome P450 aromatase isoforms in zebrafish (Danio rerio) brain and ovary are differentially programmed and estrogen regulated during early development.</a> Endocrinology. 142 (2), 740-750 (2001).</li><li>Rodr&#237;guez-Mar&#237;, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Characterization+and+expression+pattern+of+zebrafish+anti-M&#252;llerian+hormone+(amh)+relative+to+sox9a,+sox9b,+and+cyp19a1a,+during+gonad+development.">Characterization and expression pattern of zebrafish anti-M&#252;llerian hormone (amh) relative to sox9a, sox9b, and cyp19a1a, during gonad development.</a> Gene Expr.Patterns. 5 (5), 655-667 (2005).</li><li>Krovel, A. V., Olsen, L. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Expression+of+a+vas::EGFP+transgene+in+primordial+germ+cells+of+the+zebrafish.">Expression of a vas::EGFP transgene in primordial germ cells of the zebrafish.</a> Mech Dev. 116 (1-2), 141-150 (2002).</li><li>Krovel, A. V., Olsen, L. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sexual+dimorphic+expression+pattern+of+a+splice+variant+of+zebrafish+vasa+during+gonadal+development.">Sexual dimorphic expression pattern of a splice variant of zebrafish vasa during gonadal development.</a> Dev. Biol. 271 (1), 190-197 (2004).</li><li>Tzung, K. W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Early+depletion+of+primordial+germ+cells+in+zebrafish+promotes+testis+formation.">Early depletion of primordial germ cells in zebrafish promotes testis formation.</a> Stem Cell Reports. 4 (1), 61-73 (2015).</li><li>Hsiao, C., Tsai, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Transgenic+zebrafish+with+fluorescent+germ+cell:+a+useful+tool+to+visualize+germ+cell+proliferation+and+juvenile+hermaphroditism+in+vivo.">Transgenic zebrafish with fluorescent germ cell: a useful tool to visualize germ cell proliferation and juvenile hermaphroditism in vivo.</a> Dev. Biol. 262 (2), 313-323 (2003).</li><li>Jorgensen, A., Nielsen, J. E., Morthorst, J. E., Bjerregaard, P., Leffers, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Laser+capture+microdissection+of+gonads+from+juvenile+zebrafish.">Laser capture microdissection of gonads from juvenile zebrafish.</a> Reprod Biol Endocrinol. 7, 97 (2009).</li><li>Chen, S., Zhang, H., Wang, F., Zhang, W., Peng, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=nr0b1+(DAX1)+mutation+in+zebrafish+causes+female-to-male+sex+reversal+through+abnormal+gonadal+proliferation+and+differentiation.">nr0b1 (DAX1) mutation in zebrafish causes female-to-male sex reversal through abnormal gonadal proliferation and differentiation.</a> Mol. Cell. Endocrinol. 433, 105-116 (2016).</li><li>Westerfield, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> The Zebrafish Book: A Guide for The Laboratory Use of Zebrafish (Danio rerio). , (2000).</li><li>Liew, W. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Polygenic+sex+determination+system+in+zebrafish.">Polygenic sex determination system in zebrafish.</a> PLoS One. 7 (4), e34397 (2012).</li><li>Parichy, D. M., Elizondo, M. R., Mills, M. G., Gordon, T. N., Engeszer, R. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Normal+table+of+postembryonic+zebrafish+development:+staging+by+externally+visible+anatomy+of+the+living+fish.">Normal table of postembryonic zebrafish development: staging by externally visible anatomy of the living fish.</a> Dev Dyn. 238 (12), 2975-3015 (2009).</li><li>Gupta, T., Mullins, M. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dissection+of+Organs+from+the+Adult+Zebrafish.">Dissection of Organs from the Adult Zebrafish.</a> J. Vis Exp. (37), (2010).</li><li>Arnaout, R., Reischauer, S., Stainier, D. Y. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recovery+of+Adult+Zebrafish+Hearts+for+High-throughput+Applications.">Recovery of Adult Zebrafish Hearts for High-throughput Applications.</a> J. Vis Exp. (94), (2014).</li><li>Gerlach, G. F., Schrader, L. N., Wingert, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dissection+of+the+Adult+Zebrafish+Kidney.">Dissection of the Adult Zebrafish Kidney.</a> J. Vis Exp. (54), (2011).</li><li>Yoon, C., Kawakami, K., Hopkins, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Zebrafish+vasa+homologue+RNA+is+localized+to+the+cleavage+planes+of+2-+and+4-cell-stage+embryos+and+is+expressed+in+the+primordial+germ+cells.">Zebrafish vasa homologue RNA is localized to the cleavage planes of 2- and 4-cell-stage embryos and is expressed in the primordial germ cells.</a> Development. 124 (16), 3157-3165 (1997).</li><li>Braat, A. K., Speksnijder, J. E., Zivkovic, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Germ+line+development+in+fishes.">Germ line development in fishes.</a> Int. J. Dev. Biol. 43 (7), 745-760 (1999).</li><li>Huang, H. Y., Ketting, R. 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Zebrafisken er blevet et stærkt model og benyttes flittigt i udvikling og sygdomsrelaterede forskning. Fremgangsmåderne til isolering af organer hos voksne zebrafisk såsom hjerne, hjerte, gonade, og nyre, er veldokumenteret 23, 24, 25. På grund af den lille størrelse og dynamisk remodellering af de gonadale væv i larve zebrafisk, isolering af gonadal væv er en udfordrende opgave. Tidligere undersøgelser anvendes hele di...

Den største kvindelige køn determinant i vild zebrafisk kromosom 4 går tabt eller ændret i den domesticerede zebrafisk (dvs. fælles lab stammer) 1. I stedet har de en polygenisk kønsbestemmelse systemet ledsages af miljømæssige faktorer, såsom temperatur, hypoxi, fødevarer tilgængelighed og befolkningstæthed. De detaljerede mekanismer i zebrafisk sex udvikling er ikke fuldt forstået. Grundlæggende spørgsmål såsom når zebrafisk kønsbestemmelse sker, hvad den primære kønsbestemmelse signal (er) er / er, og hvilke gener regulerer det første trin af gonade transformation mangler at blive besvaret 2, 3. I processen med zebrafisk sex udvikling, har flere vigtige etaper blevet anerkendt. I den tidlige fase af udviklingen, ud fra 4 HPF (timer efter befrugtning) primordiale kønsceller-celler (PGC) undergår specifikation, migration til genitalkammen ogproliferation. PGC numre og gensidige interaktioner mellem kimceller og somatiske celler er vigtige for gonade differentiering 4. Ved 13 dpf (dage efter befrugtning), gonaderne er på den udifferentierede stadie. Ved 17 dpf, kønskirtlerne udvikle sig til bi-potentielle æggestokke i både fremtidige hunner og hanner. Den apoptose-afhængige overgang fra æggestok til testiklerne begynde på 21 til 25 dpf og kan fortsætte i flere uger. Med 35 dpf, har køn gonaden blevet bestemt og kønsspecifik produktion gamet er undervejs i begge æggestokke og testikler 5, 6, 7. Til dato er der blevet foreslået forskellige kandidatgener og mekanismer kønsbestemmelse. Proteomics og transkriptom analyse har isoleret mange gener med seksuelt dimorfe ekspression og disse gener er blevet anvendt til at studere sex differentiering i zebrafisk 8, </sup&gt; 9, 10. For eksempel i larvernes zebrafisk, den cyp19a1a genet udtrykkes specifikt i ovariet, men ikke i testiklerne 11, 12. Desuden er AMH gen svagt udtrykt i ovariefolliklen granulosaceller, men kraftigt i testis Sertoli-celler 13. I modsætning hertil er vasa gen udtrykkes kontinuerligt i kimceller både kvindelige og mandlige zebrafisk, hvilket gør det til et egnet gonadedosis markør 14, 15. Undersøge gonadale genekspressionsniveauer er vigtigt at forstå den molekylære mekanisme for kønsbestemmelse og differentiering især i bi-potentialet æggestok trin 3, 9. Men den lille størrelse af larvestadiet zebrafisk og tilsvarende små gonader komplicere isoleringen af ​​gonadal væv til yderligere molekylær analyse. Tidligere undersøgelser anvendte dissekeret hele bagagerum område mellem gællelåg og anal pore 16. Dette præparat, selvom indeholdende kønskirtler, består af flere væv og organer. Alternativt transgene dyr med gonade-specifik GFP-ekspression såsom vasa: blev EGFP anvendt til gonadal væv isolation via fluorescensaktiveret cellesortering (FACS) og laser capture mikrodissektion 17, 18. Men deres udbredte anvendelse er begrænset. Her beskriver vi en enkel procedure til isolering gonadal væv fra larve zebrafisk ved 17 dpf og 25 dpf. Vi demonstrerer placeringen af ​​kønskirtlerne med hensyn til andre organer og isolere de morfologisk intakte gonaderne fra de omgivende væv. Vi viser yderligere gonaden-specifikke gener, såsom vasa og cyp19a1a er højt udtrykt i de isolerede gonader sammenlignet med stammen væv gennem kvantitativ PCR (qPCR) analyse. Den foreliggende protokol tillader identifikation, isolering, RNA oprensning og amplifikation af gonadale specifikke gener fra larve zebrafisk, hvorved efterfølgende molekylær analyse af gonadal væv 19.

<table border="0" cellpadding="0" cellspacing="0" width="975">
	<tbody>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Cell culture dish 100 mm</td>
			<td style="width:208px;">Corning</td>
			<td style="width:208px;">430167</td>
			<td style="width:351px;">For embryo incubation</td>
		</tr>
		<tr height="85">
			<td height="85" style="height:85px;width:208px;">20 X EM</td>
			<td style="width:208px;"></td>
			<td style="width:208px;"></td>
			<td style="width:351px;">For a 1 liter needed: add 17.5 g NaCl, 0.75 g KCl and 2.9 g CaCl.2H2O; then add 0.41 g KH2PO4, 0.412 g Na2HPO4 anhydrous and 4.9 g MgSO4. 7H2O.</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">1 X EM</td>
			<td style="width:208px;"></td>
			<td style="width:208px;"></td>
			<td style="width:351px;">Dilute 20 X EM in distilled water</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">AGAROSE G-10</td>
			<td style="width:208px;">Gene</td>
			<td style="width:208px;">121985</td>
			<td style="width:351px;">For preparing the 2% agar plates&#160;</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Trizol Reagent</td>
			<td style="width:208px;">Invitrogen</td>
			<td style="width:208px;">15596-026</td>
			<td style="width:351px;">For RNA isolation&#160;</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Meter glass</td>
			<td style="width:208px;">Shen Bo</td>
			<td style="width:208px;">250 ml</td>
			<td style="width:351px;">For preparing the 2% agar plates&#160;</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Microwave Oven</td>
			<td style="width:208px;">Midea</td>
			<td style="width:208px;">M1-211A</td>
			<td style="width:351px;">For heating the AGAR</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">TWEEZER DUMONT#5INOX</td>
			<td style="width:208px;">World Precision Instrument</td>
			<td style="width:208px;">500341</td>
			<td style="width:351px;">For dissection</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Stereomicroscope</td>
			<td style="width:208px;">Motic</td>
			<td style="width:208px;">SMZ168</td>
			<td style="width:351px;">For dissection</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Pure water equipment</td>
			<td style="width:208px;">Millipore</td>
			<td style="width:208px;"></td>
			<td style="width:351px;"></td>
		</tr>
		<tr height="81">
			<td height="81" style="height:81px;width:208px;">Ringer&#8217;s solution</td>
			<td style="width:208px;"></td>
			<td style="width:208px;"></td>
			<td style="width:351px;">For a 1 liter needed: Add 6.78g NaCl, 0.22 g KCl, 0.26 g CaCl2 and 1.19 g Hepes; then fill to 1 L; Adjust pH to 7.2. Sterilize by filtration and keep in an autoclaved clear polycarbonate container.</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Transfer pipette</td>
			<td style="width:208px;">Samco</td>
			<td style="width:208px;">202, 204</td>
			<td style="width:351px;"></td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Metal bath</td>
			<td style="width:208px;">QiLinbeier</td>
			<td style="width:208px;"></td>
			<td style="width:351px;">Model GL-150</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Microscope</td>
			<td style="width:208px;">Leica&#160;</td>
			<td style="width:208px;">M205 FA</td>
			<td style="width:351px;">For photomicrograph</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Centrifuge</td>
			<td style="width:208px;">Eppendorf</td>
			<td style="width:208px;">5417R</td>
			<td style="width:351px;"></td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Micro Scale RNA Isolation Kit&#160;</td>
			<td style="width:208px;">Ambion</td>
			<td style="width:208px;">AM1931</td>
			<td style="width:351px;">For RNA isolation from gonad tissues</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Dnase I&#160;</td>
			<td style="width:208px;">Sigma</td>
			<td style="width:208px;">AMPD1-1KT</td>
			<td style="width:351px;">For DNA digestion in the RNA solution&#160;</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">RevertAid First Strand cDNA Synthesis Kit</td>
			<td style="width:208px;">Thermo Scientific</td>
			<td style="width:208px;">#K1631</td>
			<td style="width:351px;">For&#160; first-strand cDNA synthesis</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Rnase H&#160;</td>
			<td style="width:208px;">Thermo Scientific</td>
			<td style="width:208px;">#EN0202</td>
			<td style="width:351px;">For digesting the residual RNA in the cDNA solution.</td>
		</tr>
		<tr height="98">
			<td height="98" style="height:98px;width:208px;">SYBR Green Realtime PCR Master Mix</td>
			<td style="width:208px;">TOYOBO</td>
			<td style="width:208px;">QPK-201</td>
			<td style="width:351px;">This product is a Taq DNA polymerase-based 2 x master mix for real-time PCR and&#160; applicable for intercalation assay with SYBR Green I.</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Spectrophotometer</td>
			<td style="width:208px;">Ne Drop</td>
			<td style="width:208px;">OD-2000+</td>
			<td>Measuring the concentration of the total RNA</td>
		</tr>
		<tr height="44">
			<td height="44" style="height:44px;width:208px;">Mastercycler</td>
			<td style="width:208px;">Eppendorf</td>
			<td style="width:208px;">AG 22331 Hamburg</td>
			<td>gene expression profiling</td>
		</tr>
	</tbody>
</table>

dissection of larval zebrafish gonadal tissue

Selvom vild zebrafisk besidder en ZZ / ZW sex-bestemmelsessystem, har tamme zebrafisk mistet køn kromosom. De udnytter en polygenisk kønsbestemmelse systemet, hvor flere gener fordelt over hele genomet kollektivt bestemme sex identitet fisk. I øjeblikket er de gener, der er involveret i reguleringen af ​​gonade udvikling, og hvordan de fungerer forblive undvigende. Normalt isolere gonadal væv er det første skridt til at undersøge sex udviklingsmæssige processer. Her præsenterer vi en fremgangsmåde til isolering gonadal væv fra 17 dpf (dage efter befrugtning) og 25 dpf zebrafisk larver. Det isolerede gonadal væv kan efterfølgende undersøgt ved morfologi og genekspressionsprofilering.

Dissektioner af kønskirtlerne blev udført på AB-stamme larvernes zebrafisk. Figur 1 viser typiske gonadal væv af larvestadiet zebrafisk ved 17 dpf og 25 dpf. For det første er huden og musklerne i den ene side af maven skåret til eksponere de indre organer. Efter fjernelse af massen af ​​indre organer, svømmeblære sammen med gonaden forbliver i bagagerummet. Gonaden blev fastgjort til den ventrale side af svømmeblære (pil i <strong class="xfig"...

Watch this Scientific Journal Video about Dissection of Larval Zebrafish Gonadal Tissue at JoVE.com

Dissection of Larval Zebrafish Gonadal Tissue

Her præsenterer vi en protokol til isolering gonadal væv af larve zebrafisk, der vil lette undersøgelser af zebrafisk køn differentiering og vedligeholdelse.

Dissektion af Larver zebrafisk gonadale Tissue

Although wild zebrafish possess a ZZ/ZW sex-determination system, domesticated zebrafish have lost the sex chromosome. They utilize a polygenic sex ...

Research

JoVE Journal

Developmental Biology

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Storstilet zebrafisk Embryonale Heart Dissektion for Transkriptionel Analysis

The zebrafish embryonic heart is composed of only a few hundred cells, representing only a small fraction of the entire embryo. Therefore, to prevent the ...

Live Imaging of Innate Immune and Preneoplastic Cell Interactions Using an Inducible Gal4/UAS Expression System in Larval Zebrafish Skin

Live-Imaging af medfødte immunsystem og præneoplastiske celleinteraktioner Brug en inducerbar Gal4 / UAS Expression System i Larve Zebrafisk Skin

Here we describe a method to conditionally induce epithelial cell transformation by the use of the 4-Hydroxytamoxifen (4-OHT) inducible KalTA4-ERT2/UAS ...

Capturing Tissue Repair in Zebrafish Larvae with Time-lapse Brightfield Stereomicroscopy

Optagelse Tissue Repair i zebrafisk Larver med Time-lapse Lysfelt stereomikroskopi

The zebrafish larval tail fin is ideal for studying tissue regeneration due to the simple architecture of the larval fin-fold, which comprises of two ...

Visualizing the Interrenal Steroidogenic Tissue and Its Vascular Microenvironment in Zebrafish

Visualisere Interrenal steroidogeniske Tissue og dens Vaskulær mikromiljø i Zebrafisk

This protocol introduces how to detect differentiated interrenal steroidogenic cells through a simple whole-mount enzymatic activity assay. Identifying ...

Dissection and Culture of Mouse Embryonic Kidney

Dissektion og kultur af mus embryonisk nyre

The goal of this protocol is to describe a method for the dissection, isolation, and culture of mouse metanephric rudiments. 
During mammalian kidney ...

Establishment of Larval Zebrafish as an Animal Model to Investigate Trypanosoma cruzi Motility In Vivo

Establishment of Larval Zebrafish as an Animal Model to Investigate Trypanosoma cruzi Motility In Vivo

Etablering af larve zebrafisk som en dyr Model til at undersøge Trypanosoma cruzi motilitet In Vivo

Chagas disease is a parasitic infection caused by Trypanosoma cruzi, whose motility is not only important for localization, but also for cellular binding ...

Following Endocardial Tissue Movements via Cell Photoconversion in the Zebrafish Embryo

Følgende endokardial væv bevægelser via celle Photoconversion i zebrafisk Embryo

During embryogenesis, cells undergo dynamic changes in cell behavior, and deciphering the cellular logic behind these changes is a fundamental goal in the ...

Adult Zebrafish Injury Models to Study the Effects of Prednisolone in Regenerating Bone Tissue

Voksen zebrafisk skade modeller at studere virkningerne af Prednisolon i regenererende knoglevæv

Zebrafish are able to regenerate various organs, including appendages (fins) after amputation. This involves the regeneration of bone, which regrows ...

Electroretinogram Recording in Larval Zebrafish using A Novel Cone-Shaped Sponge-tip Electrode

Electroretinogram optagelse i larve zebrafisk ved hjælp af en roman kegle-formede svamp-tip elektrode

The zebrafish (Danio rerio) is commonly used as a vertebrate model in developmental studies and is particularly suitable for visual neuroscience. For ...

Quantifying Liver Size in Larval Zebrafish Using Brightfield Microscopy

Kvantificering leverstørrelse i Larval Zebrafish Ved hjælp af Brightfield Mikroskopi

In several transgenic zebrafish models of hepatocellular carcinoma (HCC), hepatomegaly can be observed during early larval stages. Quantifying larval ...