Name: real-time imaging of leukotriene b4 mediated cell migration and blt1 interactions with &beta;-arrestin
Uploaded: 2010-12-23T15:00:00
Description: Watch this Scientific Journal Video about Real-time Imaging of Leukotriene B4 Mediated Cell Migration and BLT1 Interactions with ÃŽÂ²-arrestin at JoVE.com

La ricerca è sostenuta dal National Institutes of concede Salute AI-52381, CA138623 e Kentucky consiglio Lung Cancer Research e il sostegno istituzionale di James Graham Brown Cancer Center.

Metodologia Descrizione del microscopio Dal vivo gli esperimenti di imaging cellulare eseguita utilizzando TE-FM Epi-Fluorescenza sistema collegato al microscopio invertito Nikon Eclipse TE300. Il microscopio dotato fase di riscaldamento. Un fresco scatto HQ digitale B / N CCD (Roper scientifico) della fotocamera e LAMDA 10-2 filtro ottico changer (società strumento Sutter) è collegata al microscopio. Lunghezze d&#39;onda di eccitazione ed emissione sono controllati...

<ol>
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C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lipid+mediator+networks+in+cell+signaling:+update+and+impact+of+cytokines.">Lipid mediator networks in cell signaling: update and impact of cytokines.</a> Faseb J. 10, 1147-1158 (1996).</li><li>Tager, A. M., Luster, A. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=BLT1+and+BLT2:+the+leukotriene+B(4)+receptors.">BLT1 and BLT2: the leukotriene B(4) receptors.</a> Prostaglandins Leukot Essent Fatty Acids. 69, 123-134 (2003).</li><li>Toda, A., Yokomizo, T., Shimizu, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Leukotriene+B4+receptors.">Leukotriene B4 receptors.</a> Prostaglandins Other Lipid Mediat. 68-69, 575-585 (2002).</li><li>Haribabu, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Targeted+disruption+of+the+leukotriene+B(4)+receptor+in+mice+reveals+its+role+in+inflammation+and+platelet-activating+factor-induced+anaphylaxis.">Targeted disruption of the leukotriene B(4) receptor in mice reveals its role in inflammation and platelet-activating factor-induced anaphylaxis.</a> J Exp Med. 192, 433-438 (2000).</li><li>Subbarao, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Role+of+leukotriene+B4+receptors+in+the+development+of+atherosclerosis:+potential+mechanisms.">Role of leukotriene B4 receptors in the development of atherosclerosis: potential mechanisms.</a> Arterioscler Thromb Vasc Biol. 24, 369-375 (2004).</li><li>Jala, V. R., Haribabu, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Leukotrienes+and+atherosclerosis:+new+roles+for+old+mediators.">Leukotrienes and atherosclerosis: new roles for old mediators.</a> Trends Immunol. 25, 315-322 (2004).</li><li>Heller, E. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inhibition+of+atherogenesis+in+BLT1-deficient+mice+reveals+a+role+for+LTB4+and+BLT1+in+smooth+muscle+cell+recruitment.">Inhibition of atherogenesis in BLT1-deficient mice reveals a role for LTB4 and BLT1 in smooth muscle cell recruitment.</a> Circulation. 112, 578-586 (2005).</li><li>Miyahara, N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Requirement+for+leukotriene+B4+receptor+1+in+allergen-induced+airway+hyperresponsiveness.">Requirement for leukotriene B4 receptor 1 in allergen-induced airway hyperresponsiveness.</a> Am J Respir Crit Care Med. 172, 161-167 (2005).</li><li>Terawaki, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Absence+of+leukotriene+B4+receptor+1+confers+resistance+to+airway+hyperresponsiveness+and+Th2-type+immune+responses.">Absence of leukotriene B4 receptor 1 confers resistance to airway hyperresponsiveness and Th2-type immune responses.</a> J Immunol. 175, 4217-4225 (2005).</li><li>Shao, W. H., Del Prete, A., Bock, C. B., Haribabu, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Targeted+disruption+of+leukotriene+B4+receptors+BLT1+and+BLT2:+a+critical+role+for+BLT1+in+collagen-induced+arthritis+in+mice.">Targeted disruption of leukotriene B4 receptors BLT1 and BLT2: a critical role for BLT1 in collagen-induced arthritis in mice.</a> J Immunol. 176, 6254-6261 (2006).</li><li>Kim, N. D., Chou, R. C., Seung, E., Tager, A. M., Luster, A. 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+unique+requirement+for+the+leukotriene+B4+receptor+BLT1+for+neutrophil+recruitment+in+inflammatory+arthritis.">A unique requirement for the leukotriene B4 receptor BLT1 for neutrophil recruitment in inflammatory arthritis.</a> J Exp Med. 203, 829-835 (2006).</li><li>Jala, V. R., Shao, W. H., Haribabu, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Phosphorylation-independent+beta-arrestin+translocation+and+internalization+of+leukotriene+B4+receptors.">Phosphorylation-independent beta-arrestin translocation and internalization of leukotriene B4 receptors.</a> J Biol Chem. 280, 4880-4887 (2005).</li><li>Jala, V. R., Haribabu, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Real-time+analysis+of+G+protein-coupled+receptor+signaling+in+live+cells.">Real-time analysis of G protein-coupled receptor signaling in live cells.</a> Methods Mol Biol. 332, 159-165 (2006).</li><li>Del Prete, A., A, . <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Regulation+of+dendritic+cell+migration+and+adaptive+immune+response+by+leukotriene+B4+receptors:+a+role+for+LTB4+in+up-regulation+of+CCR7+expression+and+function.">Regulation of dendritic cell migration and adaptive immune response by leukotriene B4 receptors: a role for LTB4 in up-regulation of CCR7 expression and function.</a> Blood. 109, 626-631 (2007).</li><li>Salogni, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Activin+A+induces+dendritic+cell+migration+through+the+polarized+release+of+CXC+chemokine+ligands+12+and+14.">Activin A induces dendritic cell migration through the polarized release of CXC chemokine ligands 12 and 14.</a> Blood. 113, 5848-5856 (2009).</li><li>Boudreau, J., Koshy, S., Cummings, D., Wan, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Culture+of+myeloid+dendritic+cells+from+bone+marrow+precursors.">Culture of myeloid dendritic cells from bone marrow precursors.</a> J Vis Exp. , (2008).</li></ol>

L&#39;imaging cellulare Live è un potente strumento per dimostrare la funzione e le interazioni delle proteine ​​specifiche che si verificano in tempo reale. I metodi descritti in questo manoscritto mostrano chiaramente che LTB 4 può provocare una rapida migrazione delle cellule dendritiche. Questi metodi non solo ampliare gli aspetti della funzione di LTB 4 tipi di cellule diverse, consentono metodi simili da applicare ad una varietà di altre chemochine e prova la loro efficacia come agenti...

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		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>Cell lines:</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Rat Basophilic Leukomia Cell line (RBL-2H3) or HEK293 cells.</td>
<td>&nbsp;</td>
<td>ATCC</td>
<td>CRL-2256</td>
<td>&nbsp;</td>
<tr>
<td>Media:</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Delbecco's modified Eagle&#x2019;s Medium (DMEM)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>11995</td>
<td>&nbsp;</td>
<tr>
<td>Phenol red free RPMI or DMEM</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>11835-030</td>
<td>&nbsp;</td>
<tr>
<td>Fetal Bovine Serum</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>16000-044</td>
<td>&nbsp;</td>
<tr>
<td>L-Glutamine (200 mM)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>25030</td>
<td>&nbsp;</td>
<tr>
<td>Penicillin-streptomycin (10000 U/mL)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>15140</td>
<td>&nbsp;</td>
<tr>
<td>Trypsin, 0.05% (1X) with EDTA 4Na, liquid</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>25300</td>
<td>&nbsp;</td>
<tr>
<td>HEPES (1M)</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>15630</td>
<td>&nbsp;</td>
<tr>
<td>Others:</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>35 mm sterile glass coverslip-bottomed Fluoro dishes (0.17 mm thick) (WillCo-dish)</td>
<td>&nbsp;</td>
<td>WPI</td>
<td>FD35-100</td>
<td>&nbsp;</td>
<tr>
<td>Sterile Gene Pulser Cuvette (0.4 cm electrode gap) (Bio-Rad)</td>
<td>&nbsp;</td>
<td>Bio-Rad</td>
<td>16552088</td>
<td>&nbsp;</td>
<tr>
<td>Instruments/software:</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Gene Pulser II electroporater </td>
<td>&nbsp;</td>
<td>Bio-Rad</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>TE-FM Epi-Fluorescence system attached to Nikon Inverted Microscope Eclipse TE300</td>
<td>&nbsp;</td>
<td>Nikon</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Metamorph Software</td>
<td>&nbsp;</td>
<td>Universal Imaging</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Vertical Micro-pipette puller</td>
<td>&nbsp;</td>
<td>Narishige International </td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Micro-Forge M-900</td>
<td>&nbsp;</td>
<td>Narishige International </td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Hadraulic Micromanipulator MO-188NE</td>
<td>&nbsp;</td>
<td>Narishige International </td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Coarse Manual Manipulator, MN-188NE</td>
<td>&nbsp;</td>
<td>Narishige International </td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>cDNA constructs:</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>cDNA of G-Protein coupled receptor tagged with red fluorescence protein at C-terminus (hBLT1-RFP)</td>
<td>&nbsp;</td>
<td>Jala et al 2005</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td> cDNA of cytosolic protein tagged with GFP (&beta;-arrestin1-GFP in present study).</td>
<td>&nbsp;</td>
<td>Jala et al 2005</td>
<td>&nbsp;</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>

real-time imaging of leukotriene b4 mediated cell migration and blt1 interactions with &beta;-arrestin

Recettori accoppiati alla proteina G (GPCR) appartengono alla famiglia delle sette proteine ​​transmembrana e mediare la trasduzione di segnali extracellulari alle risposte intracellulari. GPCR controllo diverse funzioni biologiche come la chemiotassi, rilascio del calcio intracellulare, regolazione genica in modo ligando dipendente tramite eterotrimeriche proteine ​​G 1-2. Di legame induce una serie di cambiamenti conformazionali che portano all&#39;attivazione di eterotrimeriche G-proteine ​​che modulano i livelli di secondi messaggeri come adenosina monofosfato ciclico (cAMP), inositolo trifosfato (IP3) e glicerolo diacyl (DG). In concomitanza con l&#39;attivazione del legame con il ligando del recettore avvia anche una serie di eventi per attenuare il recettore di segnalazione tramite desensibilizzazione, sequestro e / o internalizzazione. Il processo di desensibilizzazione dei GPCR avviene attraverso la fosforilazione del recettore per G-proteina chinasi del recettore (GRKs) e vincolante successiva β-arrestine 3. β-arrestine sono proteine ​​citosoliche e traslocare a membrana su attivazione GPCR, legandosi ai recettori fosforilati (la maggior parte dei casi) ci internalizzazione del recettore, facilitando 4-6. Leucotriene B 4 (LTB 4) è un pro-infiammatorie molecola lipidica derivati ​​dal percorso di acido arachidonico e media tramite le sue azioni GPCR, LTB 4 recettore 1 (BLT1, un recettore ad alta affinità) e LTB 4 recettore 2 (BLT2, un recettore a bassa affinità ) 7-9. Il 4-BLT1 LTB percorso ha dimostrato di essere critici in diverse malattie infiammatorie tra cui, l&#39;asma, l&#39;artrite e l&#39;aterosclerosi 10-17. Nel documento descrive le metodologie sviluppate per il monitoraggio LTB4-indotto migrazione dei leucociti e le interazioni di BLT1 con β-arrestina e traslocazione dei recettori in cellule vive utilizzando tecniche di imaging microscopia 18-19. Il midollo osseo le cellule dendritiche derivate da C57BL / 6 topi sono state isolate e coltivate come descritto in precedenza 20-21. Queste cellule sono state testate dal vivo nei metodi di imaging cellulare per dimostrare LTB 4 migrazione cellulare indotta. Il BLT1 umano è stato taggati con rosso proteina fluorescente (BLT1-RFP) a C-terminale e β-arrestin1 taggati con proteina fluorescente verde (β-arr-GFP) e transfettate entrambi i plasmidi in Rat basofili Leukomia (RBL-2H3) linee cellulari 18-19. La cinetica di interazione tra queste proteine ​​e localizzazione sono stati monitorati utilizzando vivere videomicroscopia cellulare. Le metodologie nel documento corrente descrivono l&#39;uso di tecniche microscopiche per studiare le risposte funzionali di G recettori accoppiati alle proteine ​​in cellule vive. Nel documento descrive inoltre l&#39;utilizzo di software Metamorph per quantificare l&#39;intensità di fluorescenza per determinare la cinetica dei recettori e le interazioni proteina citoplasmatica.

Watch this Scientific Journal Video about Real-time Imaging of Leukotriene B4 Mediated Cell Migration and BLT1 Interactions with ÃŽÂ²-arrestin at JoVE.com

Real-time Imaging of Leukotriene B4 Mediated Cell Migration and BLT1 Interactions with ÃƒÅ½Ã‚Â²-arrestin

Questo documento descrive la metodologia per determinare la risposta chemiotattica dei leucociti ai ligandi specifici e identificare le interazioni tra recettori di superficie della cellula e le proteine ​​citosoliche utilizzando vivere tecniche di imaging cellulare.

In tempo reale immagini di leucotriene B 4 Migrazione cellulare mediata e BLT1 Interazioni con β-arrestina

G-protein coupled receptors (GPCRs) belong to the seven transmembrane protein family and mediate the transduction of extracellular signals to ...

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Immunology and Infection

Real-time Imaging of Leukotriene B4 Mediated Cell Migration and BLT1 Interactions with &beta;-arrestin

Real-time Live Imaging of T-cell Signaling Complex Formation

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Protection against infectious diseases is mediated by the immune system 1,2. T lymphocytes are the master coordinators of the immune system, regulating ...

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