Name: rnai screening to identify postembryonic phenotypes in c. elegans
Uploaded: 2012-02-13T13:00:00
Description: Watch this Scientific Journal Video about RNAi Screening to Identify Postembryonic Phenotypes in C. elegans at JoVE.com

Die Autoren danken Herrn Dr. Rick Padgett (Waksman Institut, Rutgers University, NJ) für das Geschenk des DBL-1 cDNA und Dr. Christopher Rongo (Waksman Institut, Rutgers University, NJ) für eine Injektion Marker danken. Dr. Barth Grants Labor durchgeführt, die das Gen für die Bombardierung Pistole mit geringer Kopienzahl Integration des GFP-markierten DBL-1-Konstrukt. Die René Garcia Labor leistete technische Hilfe bei der Erstellung der texIs100. Die René Garcia, Robyn Lints und Hongmin Qin Laboratorien zur Verfügung gestellt produktive Beratung. Diese Arbeit wurde vom Start-up-Mitteln aus dem TAMHSC Department of Molecular and Cellular Medicine finanziert. Die Verbindung Umfang und Spinning-Disk-konfokale wurden mit Mitteln der Abteilung und der TAMHSC College of Medicine Dekanat zur Verfügung gestellt gekauft.

1. Screening-Stamm Bau Die sorgfältige Gestaltung des Screening-Stamm ist entscheidend für den Erfolg des Bildschirms und wurde an anderer Stelle 3 beschrieben. Für einige Forscher, ist mit einer Belastung, die ein sichtbares Produkt drückt aus einem Transgen für das Experiment benötigt. Viele Stämme mit integrierten Transgenen sind bei den einzelnen Forschern oder CGC. Wenn eine transgene Sorte für den Bildschirm erforderlich ist, aber nicht verfügbar ist, dann kann es unt...

<ol>
	<li>Giacomotto, J., Segalat, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-throughput+screening+and+small+animal+models,+where+are+we.">High-throughput screening and small animal models, where are we.</a> Br. J. Pharmacol. 160, 204-216 (2010).</li><li>Lamitina, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Functional+genomic+approaches+in+C.+elegans.">Functional genomic approaches in C. elegans.</a> Methods in Molecular Biology. 351, 127-138 (2006).</li><li>Boutros, M., Ahringer, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+art+and+design+of+genetic+screens:+RNA+interference.">The art and design of genetic screens: RNA interference.</a> Nat. Rev. Genet. 9, 554-566 (2008).</li><li>Praitis, V., Casey, E., Collar, D., Austin, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Creation+of+low-copy+integrated+transgenic+lines+in+Caenorhabditis+elegans.">Creation of low-copy integrated transgenic lines in Caenorhabditis elegans.</a> Genetics. 157, 1217-1226 (2001).</li><li>Yandell, M. D., Edgar, L. G., Wood, W. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Trimethylpsoralen+induces+small+deletion+mutations+in+Caenorhabditis+elegans.">Trimethylpsoralen induces small deletion mutations in Caenorhabditis elegans.</a> Proceedings of the National Academy of Sciences of the United States of America. 91, 1381-1385 (1994).</li><li>Frokjaer-Jensen, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Single-copy+insertion+of+transgenes+in+Caenorhabditis+elegans.">Single-copy insertion of transgenes in Caenorhabditis elegans.</a> Nature Genetics. 40, 1375-1383 (2008).</li><li>Giordano-Santini, R., Dupuy, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Selectable+genetic+markers+for+nematode+transgenesis.">Selectable genetic markers for nematode transgenesis.</a> Cell. Mol. Life. Sci. , (2011).</li><li>Berkowitz, L. A., Knight, A. L., Caldwell, G. A., Caldwell, K. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+of+Stable+Transgenic+C.+elegans+Using+Microinjection.">Generation of Stable Transgenic C. elegans Using Microinjection.</a> J. Vis. Exp. (18), e833 (2008).</li><li>Mello, C., Fire, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=DNA+transformation.">DNA transformation.</a> Methods in Cell Biology. 48, 451-482 (1995).</li><li>Simmer, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Loss+of+the+putative+RNA-directed+RNA+polymerase+RRF-3+makes+C.+elegans+hypersensitive+to+RNAi.">Loss of the putative RNA-directed RNA polymerase RRF-3 makes C. elegans hypersensitive to RNAi.</a> Curr. Biol. 12, 1317-1319 (2002).</li><li>Zhuang, J. J., Hunter, C. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tissue-specificity+of+Caenorhabditis+elegans+enhanced+RNAi+mutants.">Tissue-specificity of Caenorhabditis elegans enhanced RNAi mutants.</a> Genetics. , (2011).</li><li>Samuelson, A. V., Klimczak, R. R., Thompson, D. B., Carr, C. E., Ruvkun, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+Caenorhabditis+elegans+genes+regulating+longevity+using+enhanced+RNAi-sensitive+strains.">Identification of Caenorhabditis elegans genes regulating longevity using enhanced RNAi-sensitive strains.</a> Cold Spring Harbor Symposia on Quantitative Biology. 72, 489-497 (2007).</li><li>Wang, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Somatic+misexpression+of+germline+P+granules+and+enhanced+RNA+interference+in+retinoblastoma+pathway+mutants.">Somatic misexpression of germline P granules and enhanced RNA interference in retinoblastoma pathway mutants.</a> Nature. 436, 593-597 (2005).</li><li>Fraser, 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=Functional+genomic+analysis+of+C.+elegans+chromosome+I+by+systematic+RNA+interference.">Functional genomic analysis of C. elegans chromosome I by systematic RNA interference.</a> Nature. 408, 325-330 (2000).</li><li>Kamath, R. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Systematic+functional+analysis+of+the+Caenorhabditis+elegans+genome+using+RNAi.">Systematic functional analysis of the Caenorhabditis elegans genome using RNAi.</a> Nature. 421, 231-237 (2003).</li><li>Peters, K., McDowall, J., Rose, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mutations+in+the+bli-4+(I)+locus+of+Caenorhabditis+elegans+disrupt+both+adult+cuticle+and+early+larval+development.">Mutations in the bli-4 (I) locus of Caenorhabditis elegans disrupt both adult cuticle and early larval development.</a> Genetics. , 129-195 (1991).</li><li>Thacker, C., Peters, K., Srayko, M., Rose, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+bli-4+locus+of+Caenorhabditis+elegans+encodes+structurally+distinct+kex2/subtilisin-like+endoproteases+essential+for+early+development+and+adult+morphology.">The bli-4 locus of Caenorhabditis elegans encodes structurally distinct kex2/subtilisin-like endoproteases essential for early development and adult morphology.</a> Genes &#38; Development. 9, 956-971 (1995).</li><li>Byerly, L., Cassada, R. C., Russell, R. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+life+cycle+of+the+nematode+Caenorhabditis+elegans.+I.+Wild-type+growth+and+reproduction.">The life cycle of the nematode Caenorhabditis elegans. I. Wild-type growth and reproduction.</a> Dev. Biol. 51, 23-33 (1976).</li><li>Stiernagle, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Maintenance+of+C.+elegans.">Maintenance of C. elegans.</a> WormBook. , 1-11 (2006).</li><li>Savage-Dunn, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Genetic+screen+for+small+body+size+mutants+in+C.+elegans+reveals+many+TGFbeta+pathway+components.">Genetic screen for small body size mutants in C. elegans reveals many TGFbeta pathway components.</a> Genesis. 35, 239-247 (2003).</li><li>Qu, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Reliability+analysis+of+the+Ahringer+Caenorhabditis+elegans+RNAi+feeding+library:+a+guide+for+genome-wide+screens.">Reliability analysis of the Ahringer Caenorhabditis elegans RNAi feeding library: a guide for genome-wide screens.</a> BMC Genomics. 12, 1471-2164 (2011).</li><li>Nelson, M. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Bow-Tie+Genetic+Architecture+for+Morphogenesis+Suggested+by+a+Genome-Wide+RNAi+Screen+in+Caenorhabditis+elegans.">A Bow-Tie Genetic Architecture for Morphogenesis Suggested by a Genome-Wide RNAi Screen in Caenorhabditis elegans.</a> PLoS Genetics. 7, e1002010 (2011).</li><li>Timmons, L., Fire, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Specific+interference+by+ingested+dsRNA.">Specific interference by ingested dsRNA.</a> Nature. 395, 854 (1998).</li><li>Sarin, S., Prabhu, S., O'Meara, M. M., Pe'er, I., Hobert, O. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Caenorhabditis+elegans+mutant+allele+identification+by+whole-genome+sequencing.">Caenorhabditis elegans mutant allele identification by whole-genome sequencing.</a> Nature Methods. 5, 865-867 (2008).</li><li>Lewis, J. A., Fleming, J. T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Basic+culture+methods.">Basic culture methods.</a> Methods in Cell Biology. 48, 3-29 (1995).</li><li>Brenner, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+genetics+of+Caenorhabditis+elegans.">The genetics of Caenorhabditis elegans.</a> Genetics. 77, 71-94 (1974).</li></ol>

Die RNAi-Screening hier vorgestellte Methode ermöglicht eine schnelle und sensitive Analyse von Gen-Produkten für einen normalen (oder transgene) postembryonalen Phänotyp erforderlich. Das gezeigte Beispiel ist ein Bildschirm für die Gene in der subzellulären Lokalisation eines fluoreszenzmarkierten Proteins beteiligt. Allerdings ist dieses Protokoll modifiziert werden, um Gene, die anderen postembryonalen Phänotypen von Interesse zu identifizieren. Diese Methode nutzt eine Kandidateng...

<table border="1"><tbody><tr><td> Name des Reagenzes </td><td> Firma </td><td> Katalog-Nummer </td><td> Kommentare </td></tr><tr><td> NGM-Agar </td><td> Nematoden Wachstumsmedium </td><td> IPM Scientific, Inc </td><td> Kann nach der NGM-Agar-Protokoll 25 vorbereitet werden </td></tr><tr><td> M9 Medium </td><td> 22mm KH 2 PO 4, 42mm Na 2 HPO 4, 86mm NaCl, 1 mM MgSO 4 </td><td></td><td> 26 </td></tr><tr><td> Agar-Agar </td><td> EMD Chemicals Inc. </td><td> 1.01614.1000 </td><td> 2% in Wasser für NGM Platten. 4% in Wasser für Objektträger-Pads (Autoklav zunächst Mikrowelle und danach zu schmelzen). </td></tr><tr><td> Bacto Peptone </td><td> Becton Dickinson - Difco CP </td><td> 211677 </td><td> 0,25% </td&gt; </tr><tr><td> IPTG </td><td> Research Products International Corp </td><td> I56000-5.0 </td><td> 1 mM Endkonzentration </td></tr><tr><td> Carbenicillin </td><td> Research Products International Corp </td><td> C46000-5.0 </td><td> 50 ug / ml Gebrauchsverdünnung </td></tr><tr><td> LB-Nährlösung Lennox </td><td> Becton Dickinson - Difco CP </td><td> 240230 </td><td> 20 g / Liter </td></tr><tr><td> Tetracyclin </td><td> Sigma </td><td> 268054 </td><td> 12,5 pg / ml Gebrauchsverdünnung </td></tr><tr><td> Natriumhypochlorit </td><td> Jede Marke </td><td> 5% Haushaltsbleiche </td><td> Verwenden Sie frische Bleiche. </td></tr><tr><td> Natriumhydroxid </td><td> Beliebige Marke </td><td> CAS 1310-73-2 </td><td> 5 N Lager </td></tr><tr><td> M9-Medium </td><td> Wormlab Rezept-Buch </td><td> <a href="http://130.15.90.245/wormlab_recipe_book.htm#Commonlab">http://1</a>30.15.90.245/wormlab_recipe_book.htm # Commonlab </td><td> 26 </td></tr><tr><td> Levamisol </td><td> Sigma </td><td> 31742 </td><td> 100 pM - 1 mM Gebrauchsverdünnung </td></tr><tr><td> Natriumazid </td><td> Fisher Scientific </td><td> S227 </td><td> 10 mM in M9 Gebrauchsverdünnung </td></tr><tr><td> 24-Well-Platte </td><td> Greiner Bio-One </td><td> 662160 </td><td> VWR Distributor </td></tr><tr><td> Objektträger </td><td> Jede Marke </td><td> 75 x 25 x 1 mm </td><td></td></tr><tr><td> Mikroskop Deckgläser </td><td> Jede Marke </td><td> 22 x 22 mm No.1.5 </td><td> Verwenden Sie die Stärke durch das Mikroskop Hersteller empfohlen wird. </td></tr><tr><td> zusammengesetztes Mikroskop </td><td> Carl Zeiss, Inc. </td><td> A1m </td><td> Verwendung Ziele und Filter können die Bedürfnisse des Experiments lassen. </td></tr><tr><td> Medien Pumpe</td><td> Manostat Varistaltic Pumpe </td><td> Kate Modell # 72-620-000 </td><td> Verwenden Sie Schläuche und die passenden Einstellungen für die Maschine </td></tr></tbody></table>

rnai screening to identify postembryonic phenotypes in c. elegans

C. elegans has proven to be a valuable model system for the discovery and functional characterization of many genes and gene pathways1. More sophisticated tools and resources for studies in this system are facilitating continued discovery of genes with more subtle phenotypes or roles. 
Here we present a generalized protocol we adapted for identifying C. elegans genes with postembryonic phenotypes of interest using RNAi2. This procedure is easily modified to assay the phenotype of choice, whether by light or fluorescence optics on a dissecting or compound microscope. This screening protocol capitalizes on the physical assets of the organism and molecular tools the C. elegans research community has produced. As an example, we demonstrate the use of an integrated transgene that expresses a fluorescent product in an RNAi screen to identify genes required for the normal localization of this product in late stage larvae and adults. First, we used a commercially available genomic RNAi library with full-length cDNA inserts. This library facilitates the rapid identification of multiple candidates by RNAi reduction of the candidate gene product. Second, we generated an integrated transgene that expresses our fluorecently tagged protein of interest in an RNAi-sensitive background. Third, by exposing hatched animals to RNAi, this screen permits identification of gene products that have a vital embryonic role that would otherwise mask a post-embryonic role in regulating the protein of interest. Lastly, this screen uses a compound microscope equipped for single cell resolution.

Watch this Scientific Journal Video about RNAi Screening to Identify Postembryonic Phenotypes in C. elegans at JoVE.com

RNAi Screening to Identify Postembryonic Phenotypes in C. elegans

Wir beschreiben eine Methode, um sensibilisiert postembryonalen Regulatoren der Protein-Expression und Lokalisation in identifizieren<em&gt; C elegans</em&gt; Mit Hilfe eines RNAi-basierter Genom-Bildschirm und einen integrierten Transgen, die eine funktionelle, fluoreszenzmarkierten Protein exprimiert.

RNAi-Screening auf postembryonalen Phänotypen in Identifizieren C elegans</em

C. elegans has proven to be a valuable model system for the discovery and functional characterization of many genes and gene pathways1. More sophisticated ...

Research

JoVE Journal

Biology

RNAi Screening to Identify Postembryonic Phenotypes in C. elegans

Generation of Stable Transgenic C. elegans Using Microinjection

Generierung von stabilen transgenen C. elegans mit Mikroinjektion

Transgenic Caenorhabditis elegans can be readily created via microinjection of a DNA plasmid solution into the gonad 1.  The plasmid DNA rearranges to ...

Forschung

Biologie

MISSION esiRNA for RNAi Screening in Mammalian Cells

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RNA interference (RNAi) is a basic cellular mechanism for the control of gene expression. RNAi is induced by short double-stranded RNAs also known as ...

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RNA interference (RNAi) represents a high effective mechanism for specific inhibition of mRNA expression. Besides its potential as a powerful laboratory ...

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High-Throughput-Screening und Biosensorik mit Fluorescent C. elegans Die Stämme

High-throughput screening (HTS) is a powerful approach for identifying chemical modulators of biological processes.  However, many compounds identified in ...

Quantitative and Automated High-throughput Genome-wide RNAi Screens in C. elegans

Quantitative and Automated High-throughput Genome-wide RNAi Screens in C. elegans

Quantitative und automatisierte Hochdurchsatz-genomweiten RNAi-Screens in C elegans</em

RNA interference is a powerful method to understand gene function, especially when conducted at a whole-genome scale and in a quantitative context. In C. ...

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Oxygen is essential for all metazoans to survive, with one known exception1. Decreased O2 availability (hypoxia) can arise during states of disease, ...

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RNA interference by feeding worms bacteria expressing dsRNAs has been a useful tool to assess gene function in C. elegans. While this strategy works well ...

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Ein Anoxia-Hunger-Modell für Ischämie / Reperfusion in<em&gt; C. elegans</em

Protocols for anoxia/starvation in the genetic model organism C. elegans simulate ischemia/reperfusion. Worms are separated from bacterial food and placed ...