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 investigación es apoyada por los Institutos Nacionales de Salud subvenciones AI-52 381, CA138623 y Kentucky, el cáncer de pulmón Junta de Investigaciones y el apoyo institucional de James Graham Brown Cancer Center.

Metodología Descripción del Microscopio Experimentos en vivo de imágenes de células realizó con TE-FM Epi-Fluorescencia sistema conectado al microscopio Nikon Eclipse TE300 invertido. El microscopio equipado con fase de calentamiento. Un fresco presión HQ digitales B / W CCD (Roper científico) de la cámara y LAMDA 10.02 óptico cambiador de filtros (compañía de Sutter instrumento) se une al microscopio. Longitudes de onda de excitación y emisión se control...

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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. 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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>

Imágenes de células vivas es una poderosa herramienta para demostrar la función y las interacciones de las proteínas específicas que se producen en tiempo real. Los métodos descritos en este manuscrito muestra claramente que LTB 4 puede inducir una rápida migración de las células dendríticas. Estos métodos no sólo ampliar los aspectos de LTB 4 en función de diversos tipos de células, que permiten a los mismos métodos que se aplican a una variedad de otras quimiocinas y pruebas de su ...

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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

Receptores acoplados a proteína G (GPCR) pertenecen a la familia de proteínas transmembrana siete y mediar en la transducción de señales extracelulares de respuestas intracelulares. GPCRs control de diversas funciones biológicas como la quimiotaxis, la liberación de calcio intracelular, regulación de los genes de una manera dependiente de ligando a través de heterotrimeric proteínas G 1-2. Unión del ligando induce una serie de cambios conformacionales que conducen a la activación de heterotrimeric G-proteínas que modulan los niveles de segundos mensajeros como el monofosfato de adenosina cíclico (cAMP), inositol trifosfato (IP3) y glicerol diacil (DG). Concomitante con la activación de la unión del ligando del receptor también inicia una serie de eventos para atenuar la señalización del receptor a través de la desensibilización, el secuestro y / o internalización. El proceso de desensibilización de GPCRs se produce a través de la fosforilación de los receptores de las quinasas del receptor de la proteína G (GRKs) y posterior unión de β-arrestins 3. β-arrestins son proteínas citosólicas y trasladar a la membrana de la activación de GPCR, la unión a receptores fosforilados (la mayoría de los casos) que, al facilitar la internalización del receptor 6.4. Leucotrieno B 4 (LTB 4) es una molécula pro-inflamatoria lípidos derivados del ácido araquidónico vía y media sus acciones a través de GPCRs, LTB 4 receptor 1 (BLT1, un receptor de alta afinidad) y LTB 4 receptor 2 (BLT2, un receptor de baja afinidad ) 7-9. El LTB 4 BLT1 vía ha demostrado ser crucial en varias enfermedades inflamatorias, entre ellas, el asma, la artritis y la aterosclerosis 10-17. El presente documento describe las metodologías desarrolladas para controlar LTB 4-inducida por la migración de leucocitos y las interacciones de BLT1 con β-arrestina y translocación de los receptores en las células vivas mediante técnicas de microscopía 18-19. La médula ósea procedentes de células dendríticas de ratones C57BL / 6 fueron aisladas y cultivadas como se describió anteriormente 20-21. Estas células se pusieron a prueba en vivo de imágenes de células métodos para demostrar LTB 4 migración celular inducida. El BLT1 humanos fue etiquetado con la proteína roja fluorescente (RFP BLT1-) en el C-terminal y β-arrestin1 etiquetados con una proteína fluorescente verde (β-arr-GFP) y se transfectaron los plásmidos, tanto en rata basófilos Leukomia (RBL-2H3) las líneas celulares 18-19. La cinética de la interacción entre estas proteínas y la localización se controlaron mediante microscopía de vídeo en directo de la célula. Las metodologías en el presente documento describe el uso de técnicas de microscopía para investigar las respuestas funcionales de los receptores de la proteína G de acoplamiento en las células vivas. El presente documento también describe el uso de software Metamorph para cuantificar la intensidad de fluorescencia para determinar la cinética de los receptores y las interacciones de las proteínas citosólicas.

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

Este trabajo describe la metodología para determinar la respuesta quimiotáctica de los leucocitos a ligandos específicos e identificar las interacciones entre los receptores de superficie celular y proteínas citosólicas utilizando técnicas de imagen en vivo de la célula.

Imágenes en tiempo real de los leucotrienos B 4 La migración mediada por células y BLT1 interacciones 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

En tiempo real de imágenes en vivo de las células T de señalización Formación de complejos

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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Monitoring Dendritic Cell Migration using 19F / 1H Magnetic Resonance Imaging

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Imágenes en tiempo real de heterotypic plaquetas neutrófilos Interacciones en el endotelio activado durante la inflamación vascular y la formación de trombos en ratones vivos

Interaction of activated platelets and leukocytes (mainly neutrophils) on the activated endothelium mediates thrombosis and vascular inflammation.1,2 ...

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Imágenes en tiempo real de las células mieloides en Dinámica<em&gt; Apc<sup&gt; Min / +</sup</em&gt; Intestinal Tumores de Spinning disco microscopía confocal

Myeloid cells are the most abundant immune cells within tumors and have been shown to promote tumor progression. Modern intravital imaging techniques ...

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The ability of CD4 T cells to carry out effector functions is dependent upon the rapid and efficient migration of these cells in inflamed peripheral ...

High Throughput, Real-time, Dual-readout Testing of Intracellular Antimicrobial Activity and Eukaryotic Cell Cytotoxicity

De alto rendimiento, en tiempo real, Prueba de doble lectura de Intracelular Actividad antimicrobiana y la citotoxicidad celular eucariótica

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Real-time Imaging and Quantification of Fungal Biofilm Development Using a Two-Phase Recirculating Flow System

Imagen en tiempo real y cuantificación del desarrollo de biopelículas fúngicas mediante un sistema recirculación de flujo bifásico

In oropharyngeal candidiasis, members of the genus Candida must adhere to and grow on the oral mucosal surface while under the effects of salivary flow. ...

In Vitro Microfluidic Disease Model to Study Whole Blood-Endothelial Interactions and Blood Clot Dynamics in Real-Time

The formation of blood clots involves complex interactions between endothelial cells, their underlying matrix, various blood cells, and proteins. The ...

Monitoring Influenza Virus Survival Outside the Host Using Real-Time Cell Analysis

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Methods for virus particle quantification represent a critical aspect of many virology studies. Although several reliable techniques exist, they are ...